Commit | Line | Data |
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e0001a05 | 1 | /* tc-xtensa.c -- Assemble Xtensa instructions. |
2571583a | 2 | Copyright (C) 2003-2017 Free Software Foundation, Inc. |
e0001a05 NC |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 8 | the Free Software Foundation; either version 3, or (at your option) |
e0001a05 NC |
9 | any later version. |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to | |
4b4da160 NC |
18 | the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, |
19 | MA 02110-1301, USA. */ | |
e0001a05 | 20 | |
e0001a05 | 21 | #include "as.h" |
df7b86aa | 22 | #include <limits.h> |
e0001a05 NC |
23 | #include "sb.h" |
24 | #include "safe-ctype.h" | |
25 | #include "tc-xtensa.h" | |
e0001a05 NC |
26 | #include "subsegs.h" |
27 | #include "xtensa-relax.h" | |
cda2eb9e | 28 | #include "dwarf2dbg.h" |
b224e962 | 29 | #include "xtensa-istack.h" |
e0001a05 NC |
30 | #include "struc-symbol.h" |
31 | #include "xtensa-config.h" | |
b0b79343 | 32 | #include "elf/xtensa.h" |
e0001a05 | 33 | |
2caa7ca0 BW |
34 | /* Provide default values for new configuration settings. */ |
35 | #ifndef XSHAL_ABI | |
36 | #define XSHAL_ABI 0 | |
37 | #endif | |
38 | ||
e0001a05 NC |
39 | #ifndef uint32 |
40 | #define uint32 unsigned int | |
41 | #endif | |
42 | #ifndef int32 | |
43 | #define int32 signed int | |
44 | #endif | |
45 | ||
46 | /* Notes: | |
47 | ||
e0001a05 NC |
48 | Naming conventions (used somewhat inconsistently): |
49 | The xtensa_ functions are exported | |
50 | The xg_ functions are internal | |
51 | ||
52 | We also have a couple of different extensibility mechanisms. | |
53 | 1) The idiom replacement: | |
54 | This is used when a line is first parsed to | |
55 | replace an instruction pattern with another instruction | |
56 | It is currently limited to replacements of instructions | |
57 | with constant operands. | |
58 | 2) The xtensa-relax.c mechanism that has stronger instruction | |
59 | replacement patterns. When an instruction's immediate field | |
60 | does not fit the next instruction sequence is attempted. | |
61 | In addition, "narrow" opcodes are supported this way. */ | |
62 | ||
63 | ||
64 | /* Define characters with special meanings to GAS. */ | |
65 | const char comment_chars[] = "#"; | |
66 | const char line_comment_chars[] = "#"; | |
67 | const char line_separator_chars[] = ";"; | |
68 | const char EXP_CHARS[] = "eE"; | |
69 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
70 | ||
71 | ||
43cd72b9 BW |
72 | /* Flags to indicate whether the hardware supports the density and |
73 | absolute literals options. */ | |
e0001a05 | 74 | |
f7e16c2a MF |
75 | bfd_boolean density_supported; |
76 | bfd_boolean absolute_literals_supported; | |
43cd72b9 | 77 | |
43cd72b9 BW |
78 | static vliw_insn cur_vinsn; |
79 | ||
77cba8a3 | 80 | unsigned xtensa_num_pipe_stages; |
f7e16c2a | 81 | unsigned xtensa_fetch_width; |
43cd72b9 BW |
82 | |
83 | static enum debug_info_type xt_saved_debug_type = DEBUG_NONE; | |
84 | ||
85 | /* Some functions are only valid in the front end. This variable | |
c138bc38 | 86 | allows us to assert that we haven't crossed over into the |
43cd72b9 BW |
87 | back end. */ |
88 | static bfd_boolean past_xtensa_end = FALSE; | |
e0001a05 NC |
89 | |
90 | /* Flags for properties of the last instruction in a segment. */ | |
91 | #define FLAG_IS_A0_WRITER 0x1 | |
92 | #define FLAG_IS_BAD_LOOPEND 0x2 | |
93 | ||
94 | ||
95 | /* We define a special segment names ".literal" to place literals | |
96 | into. The .fini and .init sections are special because they | |
97 | contain code that is moved together by the linker. We give them | |
98 | their own special .fini.literal and .init.literal sections. */ | |
99 | ||
100 | #define LITERAL_SECTION_NAME xtensa_section_rename (".literal") | |
43cd72b9 | 101 | #define LIT4_SECTION_NAME xtensa_section_rename (".lit4") |
e0001a05 | 102 | #define INIT_SECTION_NAME xtensa_section_rename (".init") |
74869ac7 | 103 | #define FINI_SECTION_NAME xtensa_section_rename (".fini") |
e0001a05 NC |
104 | |
105 | ||
43cd72b9 | 106 | /* This type is used for the directive_stack to keep track of the |
74869ac7 BW |
107 | state of the literal collection pools. If lit_prefix is set, it is |
108 | used to determine the literal section names; otherwise, the literal | |
109 | sections are determined based on the current text section. The | |
110 | lit_seg and lit4_seg fields cache these literal sections, with the | |
111 | current_text_seg field used a tag to indicate whether the cached | |
112 | values are valid. */ | |
e0001a05 NC |
113 | |
114 | typedef struct lit_state_struct | |
115 | { | |
74869ac7 BW |
116 | char *lit_prefix; |
117 | segT current_text_seg; | |
e0001a05 | 118 | segT lit_seg; |
43cd72b9 | 119 | segT lit4_seg; |
e0001a05 NC |
120 | } lit_state; |
121 | ||
122 | static lit_state default_lit_sections; | |
123 | ||
124 | ||
74869ac7 BW |
125 | /* We keep a list of literal segments. The seg_list type is the node |
126 | for this list. The literal_head pointer is the head of the list, | |
127 | with the literal_head_h dummy node at the start. */ | |
e0001a05 NC |
128 | |
129 | typedef struct seg_list_struct | |
130 | { | |
131 | struct seg_list_struct *next; | |
132 | segT seg; | |
133 | } seg_list; | |
134 | ||
135 | static seg_list literal_head_h; | |
136 | static seg_list *literal_head = &literal_head_h; | |
e0001a05 NC |
137 | |
138 | ||
82e7541d BW |
139 | /* Lists of symbols. We keep a list of symbols that label the current |
140 | instruction, so that we can adjust the symbols when inserting alignment | |
141 | for various instructions. We also keep a list of all the symbols on | |
142 | literals, so that we can fix up those symbols when the literals are | |
143 | later moved into the text sections. */ | |
144 | ||
145 | typedef struct sym_list_struct | |
146 | { | |
147 | struct sym_list_struct *next; | |
148 | symbolS *sym; | |
149 | } sym_list; | |
150 | ||
151 | static sym_list *insn_labels = NULL; | |
152 | static sym_list *free_insn_labels = NULL; | |
153 | static sym_list *saved_insn_labels = NULL; | |
154 | ||
155 | static sym_list *literal_syms; | |
156 | ||
157 | ||
43cd72b9 BW |
158 | /* Flags to determine whether to prefer const16 or l32r |
159 | if both options are available. */ | |
160 | int prefer_const16 = 0; | |
161 | int prefer_l32r = 0; | |
162 | ||
e0001a05 NC |
163 | /* Global flag to indicate when we are emitting literals. */ |
164 | int generating_literals = 0; | |
165 | ||
43cd72b9 BW |
166 | /* The following PROPERTY table definitions are copied from |
167 | <elf/xtensa.h> and must be kept in sync with the code there. */ | |
168 | ||
169 | /* Flags in the property tables to specify whether blocks of memory | |
170 | are literals, instructions, data, or unreachable. For | |
171 | instructions, blocks that begin loop targets and branch targets are | |
172 | designated. Blocks that do not allow density, instruction | |
173 | reordering or transformation are also specified. Finally, for | |
174 | branch targets, branch target alignment priority is included. | |
175 | Alignment of the next block is specified in the current block | |
176 | and the size of the current block does not include any fill required | |
177 | to align to the next block. */ | |
178 | ||
179 | #define XTENSA_PROP_LITERAL 0x00000001 | |
180 | #define XTENSA_PROP_INSN 0x00000002 | |
181 | #define XTENSA_PROP_DATA 0x00000004 | |
182 | #define XTENSA_PROP_UNREACHABLE 0x00000008 | |
183 | /* Instruction only properties at beginning of code. */ | |
184 | #define XTENSA_PROP_INSN_LOOP_TARGET 0x00000010 | |
185 | #define XTENSA_PROP_INSN_BRANCH_TARGET 0x00000020 | |
186 | /* Instruction only properties about code. */ | |
187 | #define XTENSA_PROP_INSN_NO_DENSITY 0x00000040 | |
188 | #define XTENSA_PROP_INSN_NO_REORDER 0x00000080 | |
99ded152 BW |
189 | /* Historically, NO_TRANSFORM was a property of instructions, |
190 | but it should apply to literals under certain circumstances. */ | |
191 | #define XTENSA_PROP_NO_TRANSFORM 0x00000100 | |
43cd72b9 BW |
192 | |
193 | /* Branch target alignment information. This transmits information | |
194 | to the linker optimization about the priority of aligning a | |
195 | particular block for branch target alignment: None, low priority, | |
196 | high priority, or required. These only need to be checked in | |
197 | instruction blocks marked as XTENSA_PROP_INSN_BRANCH_TARGET. | |
198 | Common usage is | |
199 | ||
200 | switch (GET_XTENSA_PROP_BT_ALIGN (flags)) | |
201 | case XTENSA_PROP_BT_ALIGN_NONE: | |
202 | case XTENSA_PROP_BT_ALIGN_LOW: | |
203 | case XTENSA_PROP_BT_ALIGN_HIGH: | |
204 | case XTENSA_PROP_BT_ALIGN_REQUIRE: | |
205 | */ | |
206 | #define XTENSA_PROP_BT_ALIGN_MASK 0x00000600 | |
207 | ||
208 | /* No branch target alignment. */ | |
209 | #define XTENSA_PROP_BT_ALIGN_NONE 0x0 | |
210 | /* Low priority branch target alignment. */ | |
211 | #define XTENSA_PROP_BT_ALIGN_LOW 0x1 | |
212 | /* High priority branch target alignment. */ | |
213 | #define XTENSA_PROP_BT_ALIGN_HIGH 0x2 | |
214 | /* Required branch target alignment. */ | |
215 | #define XTENSA_PROP_BT_ALIGN_REQUIRE 0x3 | |
216 | ||
43cd72b9 BW |
217 | #define SET_XTENSA_PROP_BT_ALIGN(flag, align) \ |
218 | (((flag) & (~XTENSA_PROP_BT_ALIGN_MASK)) | \ | |
219 | (((align) << 9) & XTENSA_PROP_BT_ALIGN_MASK)) | |
220 | ||
221 | ||
222 | /* Alignment is specified in the block BEFORE the one that needs | |
223 | alignment. Up to 5 bits. Use GET_XTENSA_PROP_ALIGNMENT(flags) to | |
224 | get the required alignment specified as a power of 2. Use | |
225 | SET_XTENSA_PROP_ALIGNMENT(flags, pow2) to set the required | |
226 | alignment. Be careful of side effects since the SET will evaluate | |
227 | flags twice. Also, note that the SIZE of a block in the property | |
228 | table does not include the alignment size, so the alignment fill | |
229 | must be calculated to determine if two blocks are contiguous. | |
230 | TEXT_ALIGN is not currently implemented but is a placeholder for a | |
231 | possible future implementation. */ | |
232 | ||
233 | #define XTENSA_PROP_ALIGN 0x00000800 | |
234 | ||
235 | #define XTENSA_PROP_ALIGNMENT_MASK 0x0001f000 | |
236 | ||
43cd72b9 BW |
237 | #define SET_XTENSA_PROP_ALIGNMENT(flag, align) \ |
238 | (((flag) & (~XTENSA_PROP_ALIGNMENT_MASK)) | \ | |
239 | (((align) << 12) & XTENSA_PROP_ALIGNMENT_MASK)) | |
240 | ||
241 | #define XTENSA_PROP_INSN_ABSLIT 0x00020000 | |
242 | ||
243 | ||
244 | /* Structure for saving instruction and alignment per-fragment data | |
245 | that will be written to the object file. This structure is | |
246 | equivalent to the actual data that will be written out to the file | |
247 | but is easier to use. We provide a conversion to file flags | |
248 | in frag_flags_to_number. */ | |
249 | ||
250 | typedef struct frag_flags_struct frag_flags; | |
251 | ||
252 | struct frag_flags_struct | |
253 | { | |
254 | /* is_literal should only be used after xtensa_move_literals. | |
255 | If you need to check if you are generating a literal fragment, | |
256 | then use the generating_literals global. */ | |
257 | ||
258 | unsigned is_literal : 1; | |
259 | unsigned is_insn : 1; | |
260 | unsigned is_data : 1; | |
261 | unsigned is_unreachable : 1; | |
262 | ||
99ded152 BW |
263 | /* is_specific_opcode implies no_transform. */ |
264 | unsigned is_no_transform : 1; | |
265 | ||
43cd72b9 BW |
266 | struct |
267 | { | |
268 | unsigned is_loop_target : 1; | |
269 | unsigned is_branch_target : 1; /* Branch targets have a priority. */ | |
270 | unsigned bt_align_priority : 2; | |
271 | ||
272 | unsigned is_no_density : 1; | |
273 | /* no_longcalls flag does not need to be placed in the object file. */ | |
43cd72b9 BW |
274 | |
275 | unsigned is_no_reorder : 1; | |
276 | ||
277 | /* Uses absolute literal addressing for l32r. */ | |
278 | unsigned is_abslit : 1; | |
279 | } insn; | |
280 | unsigned is_align : 1; | |
281 | unsigned alignment : 5; | |
282 | }; | |
283 | ||
284 | ||
285 | /* Structure for saving information about a block of property data | |
286 | for frags that have the same flags. */ | |
287 | struct xtensa_block_info_struct | |
288 | { | |
289 | segT sec; | |
290 | bfd_vma offset; | |
291 | size_t size; | |
292 | frag_flags flags; | |
293 | struct xtensa_block_info_struct *next; | |
294 | }; | |
295 | ||
e0001a05 NC |
296 | |
297 | /* Structure for saving the current state before emitting literals. */ | |
298 | typedef struct emit_state_struct | |
299 | { | |
300 | const char *name; | |
301 | segT now_seg; | |
302 | subsegT now_subseg; | |
303 | int generating_literals; | |
304 | } emit_state; | |
305 | ||
306 | ||
43cd72b9 BW |
307 | /* Opcode placement information */ |
308 | ||
309 | typedef unsigned long long bitfield; | |
310 | #define bit_is_set(bit, bf) ((bf) & (0x01ll << (bit))) | |
311 | #define set_bit(bit, bf) ((bf) |= (0x01ll << (bit))) | |
312 | #define clear_bit(bit, bf) ((bf) &= ~(0x01ll << (bit))) | |
313 | ||
314 | #define MAX_FORMATS 32 | |
315 | ||
316 | typedef struct op_placement_info_struct | |
317 | { | |
318 | int num_formats; | |
319 | /* A number describing how restrictive the issue is for this | |
320 | opcode. For example, an opcode that fits lots of different | |
c138bc38 | 321 | formats has a high freedom, as does an opcode that fits |
43cd72b9 | 322 | only one format but many slots in that format. The most |
c138bc38 | 323 | restrictive is the opcode that fits only one slot in one |
43cd72b9 BW |
324 | format. */ |
325 | int issuef; | |
43cd72b9 | 326 | xtensa_format narrowest; |
43cd72b9 | 327 | char narrowest_size; |
b2d179be | 328 | char narrowest_slot; |
43cd72b9 BW |
329 | |
330 | /* formats is a bitfield with the Nth bit set | |
331 | if the opcode fits in the Nth xtensa_format. */ | |
332 | bitfield formats; | |
333 | ||
334 | /* slots[N]'s Mth bit is set if the op fits in the | |
335 | Mth slot of the Nth xtensa_format. */ | |
336 | bitfield slots[MAX_FORMATS]; | |
337 | ||
338 | /* A count of the number of slots in a given format | |
339 | an op can fit (i.e., the bitcount of the slot field above). */ | |
340 | char slots_in_format[MAX_FORMATS]; | |
341 | ||
342 | } op_placement_info, *op_placement_info_table; | |
343 | ||
344 | op_placement_info_table op_placement_table; | |
345 | ||
346 | ||
347 | /* Extra expression types. */ | |
348 | ||
349 | #define O_pltrel O_md1 /* like O_symbol but use a PLT reloc */ | |
350 | #define O_hi16 O_md2 /* use high 16 bits of symbolic value */ | |
351 | #define O_lo16 O_md3 /* use low 16 bits of symbolic value */ | |
1bbb5f21 | 352 | #define O_pcrel O_md4 /* value is a PC-relative offset */ |
28dbbc02 BW |
353 | #define O_tlsfunc O_md5 /* TLS_FUNC/TLSDESC_FN relocation */ |
354 | #define O_tlsarg O_md6 /* TLS_ARG/TLSDESC_ARG relocation */ | |
355 | #define O_tlscall O_md7 /* TLS_CALL relocation */ | |
356 | #define O_tpoff O_md8 /* TPOFF relocation */ | |
357 | #define O_dtpoff O_md9 /* DTPOFF relocation */ | |
43cd72b9 | 358 | |
bbdd25a8 BW |
359 | struct suffix_reloc_map |
360 | { | |
b9bb4a93 | 361 | const char *suffix; |
bbdd25a8 BW |
362 | int length; |
363 | bfd_reloc_code_real_type reloc; | |
cc34adb2 | 364 | operatorT operator; |
bbdd25a8 BW |
365 | }; |
366 | ||
367 | #define SUFFIX_MAP(str, reloc, op) { str, sizeof (str) - 1, reloc, op } | |
368 | ||
369 | static struct suffix_reloc_map suffix_relocs[] = | |
370 | { | |
371 | SUFFIX_MAP ("l", BFD_RELOC_LO16, O_lo16), | |
372 | SUFFIX_MAP ("h", BFD_RELOC_HI16, O_hi16), | |
373 | SUFFIX_MAP ("plt", BFD_RELOC_XTENSA_PLT, O_pltrel), | |
1bbb5f21 | 374 | SUFFIX_MAP ("pcrel", BFD_RELOC_32_PCREL, O_pcrel), |
28dbbc02 BW |
375 | SUFFIX_MAP ("tlsfunc", BFD_RELOC_XTENSA_TLS_FUNC, O_tlsfunc), |
376 | SUFFIX_MAP ("tlsarg", BFD_RELOC_XTENSA_TLS_ARG, O_tlsarg), | |
377 | SUFFIX_MAP ("tlscall", BFD_RELOC_XTENSA_TLS_CALL, O_tlscall), | |
378 | SUFFIX_MAP ("tpoff", BFD_RELOC_XTENSA_TLS_TPOFF, O_tpoff), | |
379 | SUFFIX_MAP ("dtpoff", BFD_RELOC_XTENSA_TLS_DTPOFF, O_dtpoff), | |
bbdd25a8 BW |
380 | }; |
381 | ||
43cd72b9 | 382 | |
e0001a05 NC |
383 | /* Directives. */ |
384 | ||
385 | typedef enum | |
386 | { | |
387 | directive_none = 0, | |
388 | directive_literal, | |
389 | directive_density, | |
43cd72b9 | 390 | directive_transform, |
e0001a05 NC |
391 | directive_freeregs, |
392 | directive_longcalls, | |
43cd72b9 BW |
393 | directive_literal_prefix, |
394 | directive_schedule, | |
395 | directive_absolute_literals, | |
396 | directive_last_directive | |
e0001a05 NC |
397 | } directiveE; |
398 | ||
399 | typedef struct | |
400 | { | |
401 | const char *name; | |
402 | bfd_boolean can_be_negated; | |
403 | } directive_infoS; | |
404 | ||
405 | const directive_infoS directive_info[] = | |
406 | { | |
43cd72b9 BW |
407 | { "none", FALSE }, |
408 | { "literal", FALSE }, | |
409 | { "density", TRUE }, | |
410 | { "transform", TRUE }, | |
411 | { "freeregs", FALSE }, | |
412 | { "longcalls", TRUE }, | |
413 | { "literal_prefix", FALSE }, | |
414 | { "schedule", TRUE }, | |
415 | { "absolute-literals", TRUE } | |
e0001a05 NC |
416 | }; |
417 | ||
418 | bfd_boolean directive_state[] = | |
419 | { | |
420 | FALSE, /* none */ | |
421 | FALSE, /* literal */ | |
e0001a05 | 422 | FALSE, /* density */ |
43cd72b9 | 423 | TRUE, /* transform */ |
e0001a05 NC |
424 | FALSE, /* freeregs */ |
425 | FALSE, /* longcalls */ | |
43cd72b9 | 426 | FALSE, /* literal_prefix */ |
2caa7ca0 | 427 | FALSE, /* schedule */ |
43cd72b9 | 428 | FALSE /* absolute_literals */ |
e0001a05 NC |
429 | }; |
430 | ||
b46824bd MF |
431 | /* A circular list of all potential and actual literal pool locations |
432 | in a segment. */ | |
433 | struct litpool_frag | |
434 | { | |
435 | struct litpool_frag *next; | |
436 | struct litpool_frag *prev; | |
437 | fragS *fragP; | |
438 | addressT addr; | |
439 | short priority; /* 1, 2, or 3 -- 1 is highest */ | |
440 | short original_priority; | |
441 | }; | |
442 | ||
443 | /* Map a segment to its litpool_frag list. */ | |
444 | struct litpool_seg | |
445 | { | |
446 | struct litpool_seg *next; | |
447 | asection *seg; | |
448 | struct litpool_frag frag_list; | |
449 | int frag_count; /* since last litpool location */ | |
450 | }; | |
451 | ||
452 | static struct litpool_seg litpool_seg_list; | |
453 | ||
e0001a05 NC |
454 | |
455 | /* Directive functions. */ | |
456 | ||
7fa3d080 BW |
457 | static void xtensa_begin_directive (int); |
458 | static void xtensa_end_directive (int); | |
74869ac7 | 459 | static void xtensa_literal_prefix (void); |
7fa3d080 BW |
460 | static void xtensa_literal_position (int); |
461 | static void xtensa_literal_pseudo (int); | |
462 | static void xtensa_frequency_pseudo (int); | |
463 | static void xtensa_elf_cons (int); | |
fb227da0 | 464 | static void xtensa_leb128 (int); |
e0001a05 | 465 | |
7fa3d080 | 466 | /* Parsing and Idiom Translation. */ |
e0001a05 | 467 | |
7fa3d080 | 468 | static bfd_reloc_code_real_type xtensa_elf_suffix (char **, expressionS *); |
e0001a05 | 469 | |
e0001a05 NC |
470 | /* Various Other Internal Functions. */ |
471 | ||
84b08ed9 BW |
472 | extern bfd_boolean xg_is_single_relaxable_insn (TInsn *, TInsn *, bfd_boolean); |
473 | static bfd_boolean xg_build_to_insn (TInsn *, TInsn *, BuildInstr *); | |
7fa3d080 BW |
474 | static void xtensa_mark_literal_pool_location (void); |
475 | static addressT get_expanded_loop_offset (xtensa_opcode); | |
476 | static fragS *get_literal_pool_location (segT); | |
477 | static void set_literal_pool_location (segT, fragS *); | |
478 | static void xtensa_set_frag_assembly_state (fragS *); | |
479 | static void finish_vinsn (vliw_insn *); | |
480 | static bfd_boolean emit_single_op (TInsn *); | |
34e41783 | 481 | static int total_frag_text_expansion (fragS *); |
a82c7d90 DW |
482 | static bfd_boolean use_trampolines = TRUE; |
483 | static void xtensa_check_frag_count (void); | |
484 | static void xtensa_create_trampoline_frag (bfd_boolean); | |
485 | static void xtensa_maybe_create_trampoline_frag (void); | |
486 | struct trampoline_frag; | |
487 | static int init_trampoline_frag (struct trampoline_frag *); | |
b46824bd MF |
488 | static void xtensa_maybe_create_literal_pool_frag (bfd_boolean, bfd_boolean); |
489 | static bfd_boolean auto_litpools = FALSE; | |
490 | static int auto_litpool_limit = 10000; | |
e0001a05 NC |
491 | |
492 | /* Alignment Functions. */ | |
493 | ||
d77b99c9 BW |
494 | static int get_text_align_power (unsigned); |
495 | static int get_text_align_max_fill_size (int, bfd_boolean, bfd_boolean); | |
664df4e4 | 496 | static int branch_align_power (segT); |
e0001a05 NC |
497 | |
498 | /* Helpers for xtensa_relax_frag(). */ | |
499 | ||
7fa3d080 | 500 | static long relax_frag_add_nop (fragS *); |
e0001a05 | 501 | |
b08b5071 | 502 | /* Accessors for additional per-subsegment information. */ |
e0001a05 | 503 | |
7fa3d080 BW |
504 | static unsigned get_last_insn_flags (segT, subsegT); |
505 | static void set_last_insn_flags (segT, subsegT, unsigned, bfd_boolean); | |
b08b5071 BW |
506 | static float get_subseg_total_freq (segT, subsegT); |
507 | static float get_subseg_target_freq (segT, subsegT); | |
508 | static void set_subseg_freq (segT, subsegT, float, float); | |
e0001a05 NC |
509 | |
510 | /* Segment list functions. */ | |
511 | ||
7fa3d080 BW |
512 | static void xtensa_move_literals (void); |
513 | static void xtensa_reorder_segments (void); | |
514 | static void xtensa_switch_to_literal_fragment (emit_state *); | |
515 | static void xtensa_switch_to_non_abs_literal_fragment (emit_state *); | |
516 | static void xtensa_switch_section_emit_state (emit_state *, segT, subsegT); | |
517 | static void xtensa_restore_emit_state (emit_state *); | |
74869ac7 | 518 | static segT cache_literal_section (bfd_boolean); |
e0001a05 | 519 | |
43cd72b9 BW |
520 | /* op_placement_info functions. */ |
521 | ||
7fa3d080 BW |
522 | static void init_op_placement_info_table (void); |
523 | extern bfd_boolean opcode_fits_format_slot (xtensa_opcode, xtensa_format, int); | |
524 | static int xg_get_single_size (xtensa_opcode); | |
525 | static xtensa_format xg_get_single_format (xtensa_opcode); | |
b2d179be | 526 | static int xg_get_single_slot (xtensa_opcode); |
43cd72b9 | 527 | |
e0001a05 | 528 | /* TInsn and IStack functions. */ |
43cd72b9 | 529 | |
7fa3d080 BW |
530 | static bfd_boolean tinsn_has_symbolic_operands (const TInsn *); |
531 | static bfd_boolean tinsn_has_invalid_symbolic_operands (const TInsn *); | |
532 | static bfd_boolean tinsn_has_complex_operands (const TInsn *); | |
533 | static bfd_boolean tinsn_to_insnbuf (TInsn *, xtensa_insnbuf); | |
534 | static bfd_boolean tinsn_check_arguments (const TInsn *); | |
535 | static void tinsn_from_chars (TInsn *, char *, int); | |
536 | static void tinsn_immed_from_frag (TInsn *, fragS *, int); | |
537 | static int get_num_stack_text_bytes (IStack *); | |
538 | static int get_num_stack_literal_bytes (IStack *); | |
a82c7d90 | 539 | static bfd_boolean tinsn_to_slotbuf (xtensa_format, int, TInsn *, xtensa_insnbuf); |
e0001a05 | 540 | |
43cd72b9 BW |
541 | /* vliw_insn functions. */ |
542 | ||
7fa3d080 | 543 | static void xg_init_vinsn (vliw_insn *); |
d8392fd9 | 544 | static void xg_copy_vinsn (vliw_insn *, vliw_insn *); |
7fa3d080 BW |
545 | static void xg_clear_vinsn (vliw_insn *); |
546 | static bfd_boolean vinsn_has_specific_opcodes (vliw_insn *); | |
547 | static void xg_free_vinsn (vliw_insn *); | |
43cd72b9 | 548 | static bfd_boolean vinsn_to_insnbuf |
7fa3d080 BW |
549 | (vliw_insn *, char *, fragS *, bfd_boolean); |
550 | static void vinsn_from_chars (vliw_insn *, char *); | |
43cd72b9 | 551 | |
e0001a05 | 552 | /* Expression Utilities. */ |
43cd72b9 | 553 | |
7fa3d080 BW |
554 | bfd_boolean expr_is_const (const expressionS *); |
555 | offsetT get_expr_const (const expressionS *); | |
556 | void set_expr_const (expressionS *, offsetT); | |
557 | bfd_boolean expr_is_register (const expressionS *); | |
558 | offsetT get_expr_register (const expressionS *); | |
559 | void set_expr_symbol_offset (expressionS *, symbolS *, offsetT); | |
7fa3d080 BW |
560 | bfd_boolean expr_is_equal (expressionS *, expressionS *); |
561 | static void copy_expr (expressionS *, const expressionS *); | |
e0001a05 | 562 | |
9456465c BW |
563 | /* Section renaming. */ |
564 | ||
7fa3d080 | 565 | static void build_section_rename (const char *); |
e0001a05 | 566 | |
e0001a05 NC |
567 | |
568 | /* ISA imported from bfd. */ | |
569 | extern xtensa_isa xtensa_default_isa; | |
570 | ||
571 | extern int target_big_endian; | |
572 | ||
573 | static xtensa_opcode xtensa_addi_opcode; | |
574 | static xtensa_opcode xtensa_addmi_opcode; | |
575 | static xtensa_opcode xtensa_call0_opcode; | |
576 | static xtensa_opcode xtensa_call4_opcode; | |
577 | static xtensa_opcode xtensa_call8_opcode; | |
578 | static xtensa_opcode xtensa_call12_opcode; | |
579 | static xtensa_opcode xtensa_callx0_opcode; | |
580 | static xtensa_opcode xtensa_callx4_opcode; | |
581 | static xtensa_opcode xtensa_callx8_opcode; | |
582 | static xtensa_opcode xtensa_callx12_opcode; | |
43cd72b9 | 583 | static xtensa_opcode xtensa_const16_opcode; |
e0001a05 | 584 | static xtensa_opcode xtensa_entry_opcode; |
d12f9798 | 585 | static xtensa_opcode xtensa_extui_opcode; |
43cd72b9 BW |
586 | static xtensa_opcode xtensa_movi_opcode; |
587 | static xtensa_opcode xtensa_movi_n_opcode; | |
e0001a05 | 588 | static xtensa_opcode xtensa_isync_opcode; |
19e8f41a | 589 | static xtensa_opcode xtensa_j_opcode; |
e0001a05 | 590 | static xtensa_opcode xtensa_jx_opcode; |
43cd72b9 | 591 | static xtensa_opcode xtensa_l32r_opcode; |
e0001a05 NC |
592 | static xtensa_opcode xtensa_loop_opcode; |
593 | static xtensa_opcode xtensa_loopnez_opcode; | |
594 | static xtensa_opcode xtensa_loopgtz_opcode; | |
43cd72b9 | 595 | static xtensa_opcode xtensa_nop_opcode; |
e0001a05 NC |
596 | static xtensa_opcode xtensa_nop_n_opcode; |
597 | static xtensa_opcode xtensa_or_opcode; | |
598 | static xtensa_opcode xtensa_ret_opcode; | |
599 | static xtensa_opcode xtensa_ret_n_opcode; | |
600 | static xtensa_opcode xtensa_retw_opcode; | |
601 | static xtensa_opcode xtensa_retw_n_opcode; | |
43cd72b9 | 602 | static xtensa_opcode xtensa_rsr_lcount_opcode; |
e0001a05 | 603 | static xtensa_opcode xtensa_waiti_opcode; |
62af60e2 | 604 | static int config_max_slots = 0; |
e0001a05 NC |
605 | |
606 | \f | |
607 | /* Command-line Options. */ | |
608 | ||
609 | bfd_boolean use_literal_section = TRUE; | |
19fc3723 | 610 | enum flix_level produce_flix = FLIX_ALL; |
e0001a05 | 611 | static bfd_boolean align_targets = TRUE; |
43cd72b9 | 612 | static bfd_boolean warn_unaligned_branch_targets = FALSE; |
e0001a05 | 613 | static bfd_boolean has_a0_b_retw = FALSE; |
43cd72b9 BW |
614 | static bfd_boolean workaround_a0_b_retw = FALSE; |
615 | static bfd_boolean workaround_b_j_loop_end = FALSE; | |
616 | static bfd_boolean workaround_short_loop = FALSE; | |
e0001a05 | 617 | static bfd_boolean maybe_has_short_loop = FALSE; |
43cd72b9 | 618 | static bfd_boolean workaround_close_loop_end = FALSE; |
e0001a05 | 619 | static bfd_boolean maybe_has_close_loop_end = FALSE; |
03aaa593 | 620 | static bfd_boolean enforce_three_byte_loop_align = FALSE; |
e0001a05 | 621 | |
43cd72b9 BW |
622 | /* When workaround_short_loops is TRUE, all loops with early exits must |
623 | have at least 3 instructions. workaround_all_short_loops is a modifier | |
624 | to the workaround_short_loop flag. In addition to the | |
625 | workaround_short_loop actions, all straightline loopgtz and loopnez | |
626 | must have at least 3 instructions. */ | |
e0001a05 | 627 | |
43cd72b9 | 628 | static bfd_boolean workaround_all_short_loops = FALSE; |
e0001a05 | 629 | |
7fa3d080 BW |
630 | |
631 | static void | |
632 | xtensa_setup_hw_workarounds (int earliest, int latest) | |
633 | { | |
634 | if (earliest > latest) | |
635 | as_fatal (_("illegal range of target hardware versions")); | |
636 | ||
637 | /* Enable all workarounds for pre-T1050.0 hardware. */ | |
638 | if (earliest < 105000 || latest < 105000) | |
639 | { | |
640 | workaround_a0_b_retw |= TRUE; | |
641 | workaround_b_j_loop_end |= TRUE; | |
642 | workaround_short_loop |= TRUE; | |
643 | workaround_close_loop_end |= TRUE; | |
644 | workaround_all_short_loops |= TRUE; | |
03aaa593 | 645 | enforce_three_byte_loop_align = TRUE; |
7fa3d080 BW |
646 | } |
647 | } | |
648 | ||
649 | ||
e0001a05 NC |
650 | enum |
651 | { | |
652 | option_density = OPTION_MD_BASE, | |
653 | option_no_density, | |
654 | ||
19fc3723 SA |
655 | option_flix, |
656 | option_no_generate_flix, | |
657 | option_no_flix, | |
658 | ||
e0001a05 NC |
659 | option_relax, |
660 | option_no_relax, | |
661 | ||
43cd72b9 BW |
662 | option_link_relax, |
663 | option_no_link_relax, | |
664 | ||
e0001a05 NC |
665 | option_generics, |
666 | option_no_generics, | |
667 | ||
43cd72b9 BW |
668 | option_transform, |
669 | option_no_transform, | |
670 | ||
e0001a05 NC |
671 | option_text_section_literals, |
672 | option_no_text_section_literals, | |
673 | ||
43cd72b9 BW |
674 | option_absolute_literals, |
675 | option_no_absolute_literals, | |
676 | ||
e0001a05 NC |
677 | option_align_targets, |
678 | option_no_align_targets, | |
679 | ||
43cd72b9 | 680 | option_warn_unaligned_targets, |
e0001a05 NC |
681 | |
682 | option_longcalls, | |
683 | option_no_longcalls, | |
684 | ||
685 | option_workaround_a0_b_retw, | |
686 | option_no_workaround_a0_b_retw, | |
687 | ||
688 | option_workaround_b_j_loop_end, | |
689 | option_no_workaround_b_j_loop_end, | |
690 | ||
691 | option_workaround_short_loop, | |
692 | option_no_workaround_short_loop, | |
693 | ||
694 | option_workaround_all_short_loops, | |
695 | option_no_workaround_all_short_loops, | |
696 | ||
697 | option_workaround_close_loop_end, | |
698 | option_no_workaround_close_loop_end, | |
699 | ||
700 | option_no_workarounds, | |
701 | ||
e0001a05 | 702 | option_rename_section_name, |
e0001a05 | 703 | |
43cd72b9 BW |
704 | option_prefer_l32r, |
705 | option_prefer_const16, | |
706 | ||
a82c7d90 DW |
707 | option_target_hardware, |
708 | ||
709 | option_trampolines, | |
710 | option_no_trampolines, | |
b46824bd MF |
711 | |
712 | option_auto_litpools, | |
713 | option_no_auto_litpools, | |
714 | option_auto_litpool_limit, | |
e0001a05 NC |
715 | }; |
716 | ||
717 | const char *md_shortopts = ""; | |
718 | ||
719 | struct option md_longopts[] = | |
720 | { | |
43cd72b9 BW |
721 | { "density", no_argument, NULL, option_density }, |
722 | { "no-density", no_argument, NULL, option_no_density }, | |
723 | ||
19fc3723 SA |
724 | { "flix", no_argument, NULL, option_flix }, |
725 | { "no-generate-flix", no_argument, NULL, option_no_generate_flix }, | |
726 | { "no-allow-flix", no_argument, NULL, option_no_flix }, | |
727 | ||
43cd72b9 BW |
728 | /* Both "relax" and "generics" are deprecated and treated as equivalent |
729 | to the "transform" option. */ | |
730 | { "relax", no_argument, NULL, option_relax }, | |
731 | { "no-relax", no_argument, NULL, option_no_relax }, | |
732 | { "generics", no_argument, NULL, option_generics }, | |
733 | { "no-generics", no_argument, NULL, option_no_generics }, | |
734 | ||
735 | { "transform", no_argument, NULL, option_transform }, | |
736 | { "no-transform", no_argument, NULL, option_no_transform }, | |
737 | { "text-section-literals", no_argument, NULL, option_text_section_literals }, | |
738 | { "no-text-section-literals", no_argument, NULL, | |
739 | option_no_text_section_literals }, | |
740 | { "absolute-literals", no_argument, NULL, option_absolute_literals }, | |
741 | { "no-absolute-literals", no_argument, NULL, option_no_absolute_literals }, | |
e0001a05 NC |
742 | /* This option was changed from -align-target to -target-align |
743 | because it conflicted with the "-al" option. */ | |
43cd72b9 | 744 | { "target-align", no_argument, NULL, option_align_targets }, |
7fa3d080 BW |
745 | { "no-target-align", no_argument, NULL, option_no_align_targets }, |
746 | { "warn-unaligned-targets", no_argument, NULL, | |
747 | option_warn_unaligned_targets }, | |
43cd72b9 BW |
748 | { "longcalls", no_argument, NULL, option_longcalls }, |
749 | { "no-longcalls", no_argument, NULL, option_no_longcalls }, | |
750 | ||
751 | { "no-workaround-a0-b-retw", no_argument, NULL, | |
752 | option_no_workaround_a0_b_retw }, | |
753 | { "workaround-a0-b-retw", no_argument, NULL, option_workaround_a0_b_retw }, | |
e0001a05 | 754 | |
43cd72b9 BW |
755 | { "no-workaround-b-j-loop-end", no_argument, NULL, |
756 | option_no_workaround_b_j_loop_end }, | |
757 | { "workaround-b-j-loop-end", no_argument, NULL, | |
758 | option_workaround_b_j_loop_end }, | |
e0001a05 | 759 | |
43cd72b9 BW |
760 | { "no-workaround-short-loops", no_argument, NULL, |
761 | option_no_workaround_short_loop }, | |
7fa3d080 BW |
762 | { "workaround-short-loops", no_argument, NULL, |
763 | option_workaround_short_loop }, | |
e0001a05 | 764 | |
43cd72b9 BW |
765 | { "no-workaround-all-short-loops", no_argument, NULL, |
766 | option_no_workaround_all_short_loops }, | |
767 | { "workaround-all-short-loop", no_argument, NULL, | |
768 | option_workaround_all_short_loops }, | |
769 | ||
770 | { "prefer-l32r", no_argument, NULL, option_prefer_l32r }, | |
771 | { "prefer-const16", no_argument, NULL, option_prefer_const16 }, | |
772 | ||
773 | { "no-workarounds", no_argument, NULL, option_no_workarounds }, | |
774 | ||
775 | { "no-workaround-close-loop-end", no_argument, NULL, | |
776 | option_no_workaround_close_loop_end }, | |
777 | { "workaround-close-loop-end", no_argument, NULL, | |
778 | option_workaround_close_loop_end }, | |
e0001a05 | 779 | |
7fa3d080 | 780 | { "rename-section", required_argument, NULL, option_rename_section_name }, |
e0001a05 | 781 | |
43cd72b9 BW |
782 | { "link-relax", no_argument, NULL, option_link_relax }, |
783 | { "no-link-relax", no_argument, NULL, option_no_link_relax }, | |
784 | ||
785 | { "target-hardware", required_argument, NULL, option_target_hardware }, | |
786 | ||
a82c7d90 DW |
787 | { "trampolines", no_argument, NULL, option_trampolines }, |
788 | { "no-trampolines", no_argument, NULL, option_no_trampolines }, | |
789 | ||
b46824bd MF |
790 | { "auto-litpools", no_argument, NULL, option_auto_litpools }, |
791 | { "no-auto-litpools", no_argument, NULL, option_no_auto_litpools }, | |
792 | { "auto-litpool-limit", required_argument, NULL, option_auto_litpool_limit }, | |
793 | ||
43cd72b9 | 794 | { NULL, no_argument, NULL, 0 } |
e0001a05 NC |
795 | }; |
796 | ||
797 | size_t md_longopts_size = sizeof md_longopts; | |
798 | ||
799 | ||
800 | int | |
17b9d67d | 801 | md_parse_option (int c, const char *arg) |
e0001a05 NC |
802 | { |
803 | switch (c) | |
804 | { | |
805 | case option_density: | |
43cd72b9 | 806 | as_warn (_("--density option is ignored")); |
e0001a05 NC |
807 | return 1; |
808 | case option_no_density: | |
43cd72b9 | 809 | as_warn (_("--no-density option is ignored")); |
e0001a05 | 810 | return 1; |
43cd72b9 BW |
811 | case option_link_relax: |
812 | linkrelax = 1; | |
e0001a05 | 813 | return 1; |
43cd72b9 BW |
814 | case option_no_link_relax: |
815 | linkrelax = 0; | |
e0001a05 | 816 | return 1; |
19fc3723 SA |
817 | case option_flix: |
818 | produce_flix = FLIX_ALL; | |
819 | return 1; | |
820 | case option_no_generate_flix: | |
821 | produce_flix = FLIX_NO_GENERATE; | |
822 | return 1; | |
823 | case option_no_flix: | |
824 | produce_flix = FLIX_NONE; | |
825 | return 1; | |
43cd72b9 BW |
826 | case option_generics: |
827 | as_warn (_("--generics is deprecated; use --transform instead")); | |
828 | return md_parse_option (option_transform, arg); | |
829 | case option_no_generics: | |
830 | as_warn (_("--no-generics is deprecated; use --no-transform instead")); | |
831 | return md_parse_option (option_no_transform, arg); | |
832 | case option_relax: | |
833 | as_warn (_("--relax is deprecated; use --transform instead")); | |
834 | return md_parse_option (option_transform, arg); | |
835 | case option_no_relax: | |
836 | as_warn (_("--no-relax is deprecated; use --no-transform instead")); | |
837 | return md_parse_option (option_no_transform, arg); | |
e0001a05 NC |
838 | case option_longcalls: |
839 | directive_state[directive_longcalls] = TRUE; | |
840 | return 1; | |
841 | case option_no_longcalls: | |
842 | directive_state[directive_longcalls] = FALSE; | |
843 | return 1; | |
844 | case option_text_section_literals: | |
845 | use_literal_section = FALSE; | |
846 | return 1; | |
847 | case option_no_text_section_literals: | |
848 | use_literal_section = TRUE; | |
849 | return 1; | |
43cd72b9 BW |
850 | case option_absolute_literals: |
851 | if (!absolute_literals_supported) | |
852 | { | |
853 | as_fatal (_("--absolute-literals option not supported in this Xtensa configuration")); | |
854 | return 0; | |
855 | } | |
856 | directive_state[directive_absolute_literals] = TRUE; | |
857 | return 1; | |
858 | case option_no_absolute_literals: | |
859 | directive_state[directive_absolute_literals] = FALSE; | |
860 | return 1; | |
861 | ||
e0001a05 NC |
862 | case option_workaround_a0_b_retw: |
863 | workaround_a0_b_retw = TRUE; | |
e0001a05 NC |
864 | return 1; |
865 | case option_no_workaround_a0_b_retw: | |
866 | workaround_a0_b_retw = FALSE; | |
e0001a05 NC |
867 | return 1; |
868 | case option_workaround_b_j_loop_end: | |
869 | workaround_b_j_loop_end = TRUE; | |
e0001a05 NC |
870 | return 1; |
871 | case option_no_workaround_b_j_loop_end: | |
872 | workaround_b_j_loop_end = FALSE; | |
e0001a05 NC |
873 | return 1; |
874 | ||
875 | case option_workaround_short_loop: | |
876 | workaround_short_loop = TRUE; | |
e0001a05 NC |
877 | return 1; |
878 | case option_no_workaround_short_loop: | |
879 | workaround_short_loop = FALSE; | |
e0001a05 NC |
880 | return 1; |
881 | ||
882 | case option_workaround_all_short_loops: | |
883 | workaround_all_short_loops = TRUE; | |
e0001a05 NC |
884 | return 1; |
885 | case option_no_workaround_all_short_loops: | |
886 | workaround_all_short_loops = FALSE; | |
e0001a05 NC |
887 | return 1; |
888 | ||
889 | case option_workaround_close_loop_end: | |
890 | workaround_close_loop_end = TRUE; | |
e0001a05 NC |
891 | return 1; |
892 | case option_no_workaround_close_loop_end: | |
893 | workaround_close_loop_end = FALSE; | |
e0001a05 NC |
894 | return 1; |
895 | ||
896 | case option_no_workarounds: | |
897 | workaround_a0_b_retw = FALSE; | |
e0001a05 | 898 | workaround_b_j_loop_end = FALSE; |
e0001a05 | 899 | workaround_short_loop = FALSE; |
e0001a05 | 900 | workaround_all_short_loops = FALSE; |
e0001a05 | 901 | workaround_close_loop_end = FALSE; |
e0001a05 | 902 | return 1; |
43cd72b9 | 903 | |
e0001a05 NC |
904 | case option_align_targets: |
905 | align_targets = TRUE; | |
906 | return 1; | |
907 | case option_no_align_targets: | |
908 | align_targets = FALSE; | |
909 | return 1; | |
910 | ||
43cd72b9 BW |
911 | case option_warn_unaligned_targets: |
912 | warn_unaligned_branch_targets = TRUE; | |
e0001a05 NC |
913 | return 1; |
914 | ||
e0001a05 NC |
915 | case option_rename_section_name: |
916 | build_section_rename (arg); | |
917 | return 1; | |
e0001a05 NC |
918 | |
919 | case 'Q': | |
920 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section | |
921 | should be emitted or not. FIXME: Not implemented. */ | |
922 | return 1; | |
c138bc38 | 923 | |
43cd72b9 BW |
924 | case option_prefer_l32r: |
925 | if (prefer_const16) | |
926 | as_fatal (_("prefer-l32r conflicts with prefer-const16")); | |
927 | prefer_l32r = 1; | |
928 | return 1; | |
929 | ||
930 | case option_prefer_const16: | |
931 | if (prefer_l32r) | |
932 | as_fatal (_("prefer-const16 conflicts with prefer-l32r")); | |
933 | prefer_const16 = 1; | |
934 | return 1; | |
935 | ||
c138bc38 | 936 | case option_target_hardware: |
43cd72b9 BW |
937 | { |
938 | int earliest, latest = 0; | |
17b9d67d | 939 | char *end; |
43cd72b9 BW |
940 | if (*arg == 0 || *arg == '-') |
941 | as_fatal (_("invalid target hardware version")); | |
942 | ||
17b9d67d | 943 | earliest = strtol (arg, &end, 0); |
43cd72b9 | 944 | |
17b9d67d | 945 | if (*end == 0) |
43cd72b9 | 946 | latest = earliest; |
17b9d67d | 947 | else if (*end == '-') |
43cd72b9 | 948 | { |
17b9d67d | 949 | if (*++end == 0) |
43cd72b9 | 950 | as_fatal (_("invalid target hardware version")); |
17b9d67d | 951 | latest = strtol (end, &end, 0); |
43cd72b9 | 952 | } |
17b9d67d | 953 | if (*end != 0) |
43cd72b9 BW |
954 | as_fatal (_("invalid target hardware version")); |
955 | ||
956 | xtensa_setup_hw_workarounds (earliest, latest); | |
957 | return 1; | |
958 | } | |
959 | ||
960 | case option_transform: | |
961 | /* This option has no affect other than to use the defaults, | |
962 | which are already set. */ | |
963 | return 1; | |
964 | ||
965 | case option_no_transform: | |
966 | /* This option turns off all transformations of any kind. | |
967 | However, because we want to preserve the state of other | |
968 | directives, we only change its own field. Thus, before | |
969 | you perform any transformation, always check if transform | |
970 | is available. If you use the functions we provide for this | |
971 | purpose, you will be ok. */ | |
972 | directive_state[directive_transform] = FALSE; | |
973 | return 1; | |
974 | ||
a82c7d90 DW |
975 | case option_trampolines: |
976 | use_trampolines = TRUE; | |
977 | return 1; | |
978 | ||
979 | case option_no_trampolines: | |
980 | use_trampolines = FALSE; | |
981 | return 1; | |
982 | ||
b46824bd MF |
983 | case option_auto_litpools: |
984 | auto_litpools = TRUE; | |
985 | use_literal_section = FALSE; | |
986 | return 1; | |
987 | ||
988 | case option_no_auto_litpools: | |
989 | auto_litpools = FALSE; | |
990 | auto_litpool_limit = -1; | |
991 | return 1; | |
992 | ||
993 | case option_auto_litpool_limit: | |
994 | { | |
995 | int value = 0; | |
17b9d67d | 996 | char *end; |
b46824bd MF |
997 | if (auto_litpool_limit < 0) |
998 | as_fatal (_("no-auto-litpools is incompatible with auto-litpool-limit")); | |
999 | if (*arg == 0 || *arg == '-') | |
1000 | as_fatal (_("invalid auto-litpool-limit argument")); | |
17b9d67d TS |
1001 | value = strtol (arg, &end, 10); |
1002 | if (*end != 0) | |
b46824bd MF |
1003 | as_fatal (_("invalid auto-litpool-limit argument")); |
1004 | if (value < 100 || value > 10000) | |
1005 | as_fatal (_("invalid auto-litpool-limit argument (range is 100-10000)")); | |
1006 | auto_litpool_limit = value; | |
1007 | auto_litpools = TRUE; | |
1008 | use_literal_section = FALSE; | |
1009 | return 1; | |
1010 | } | |
1011 | ||
e0001a05 NC |
1012 | default: |
1013 | return 0; | |
1014 | } | |
1015 | } | |
1016 | ||
1017 | ||
1018 | void | |
7fa3d080 | 1019 | md_show_usage (FILE *stream) |
e0001a05 | 1020 | { |
43cd72b9 BW |
1021 | fputs ("\n\ |
1022 | Xtensa options:\n\ | |
9456465c BW |
1023 | --[no-]text-section-literals\n\ |
1024 | [Do not] put literals in the text section\n\ | |
1025 | --[no-]absolute-literals\n\ | |
1026 | [Do not] default to use non-PC-relative literals\n\ | |
1027 | --[no-]target-align [Do not] try to align branch targets\n\ | |
1028 | --[no-]longcalls [Do not] emit 32-bit call sequences\n\ | |
1029 | --[no-]transform [Do not] transform instructions\n\ | |
19fc3723 SA |
1030 | --flix both allow hand-written and generate flix bundles\n\ |
1031 | --no-generate-flix allow hand-written but do not generate\n\ | |
1032 | flix bundles\n\ | |
1033 | --no-allow-flix neither allow hand-written nor generate\n\ | |
1034 | flix bundles\n\ | |
a82c7d90 DW |
1035 | --rename-section old=new Rename section 'old' to 'new'\n\ |
1036 | --[no-]trampolines [Do not] generate trampolines (jumps to jumps)\n\ | |
b46824bd MF |
1037 | when jumps do not reach their targets\n\ |
1038 | --[no-]auto-litpools [Do not] automatically create literal pools\n\ | |
1039 | --auto-litpool-limit=<value>\n\ | |
1040 | (range 100-10000) Maximum number of blocks of\n\ | |
1041 | instructions to emit between literal pool\n\ | |
1042 | locations; implies --auto-litpools flag\n", stream); | |
e0001a05 NC |
1043 | } |
1044 | ||
7fa3d080 BW |
1045 | \f |
1046 | /* Functions related to the list of current label symbols. */ | |
43cd72b9 BW |
1047 | |
1048 | static void | |
7fa3d080 | 1049 | xtensa_add_insn_label (symbolS *sym) |
43cd72b9 | 1050 | { |
7fa3d080 | 1051 | sym_list *l; |
43cd72b9 | 1052 | |
7fa3d080 | 1053 | if (!free_insn_labels) |
325801bd | 1054 | l = XNEW (sym_list); |
7fa3d080 | 1055 | else |
43cd72b9 | 1056 | { |
7fa3d080 BW |
1057 | l = free_insn_labels; |
1058 | free_insn_labels = l->next; | |
1059 | } | |
1060 | ||
1061 | l->sym = sym; | |
1062 | l->next = insn_labels; | |
1063 | insn_labels = l; | |
1064 | } | |
1065 | ||
1066 | ||
1067 | static void | |
1068 | xtensa_clear_insn_labels (void) | |
1069 | { | |
1070 | sym_list **pl; | |
1071 | ||
1072 | for (pl = &free_insn_labels; *pl != NULL; pl = &(*pl)->next) | |
1073 | ; | |
1074 | *pl = insn_labels; | |
1075 | insn_labels = NULL; | |
1076 | } | |
1077 | ||
1078 | ||
7fa3d080 | 1079 | static void |
c3ea6048 | 1080 | xtensa_move_labels (fragS *new_frag, valueT new_offset) |
7fa3d080 BW |
1081 | { |
1082 | sym_list *lit; | |
1083 | ||
1084 | for (lit = insn_labels; lit; lit = lit->next) | |
1085 | { | |
1086 | symbolS *lit_sym = lit->sym; | |
c3ea6048 BW |
1087 | S_SET_VALUE (lit_sym, new_offset); |
1088 | symbol_set_frag (lit_sym, new_frag); | |
43cd72b9 BW |
1089 | } |
1090 | } | |
1091 | ||
e0001a05 NC |
1092 | \f |
1093 | /* Directive data and functions. */ | |
1094 | ||
1095 | typedef struct state_stackS_struct | |
1096 | { | |
1097 | directiveE directive; | |
1098 | bfd_boolean negated; | |
1099 | bfd_boolean old_state; | |
1100 | const char *file; | |
1101 | unsigned int line; | |
1102 | const void *datum; | |
1103 | struct state_stackS_struct *prev; | |
1104 | } state_stackS; | |
1105 | ||
1106 | state_stackS *directive_state_stack; | |
1107 | ||
1108 | const pseudo_typeS md_pseudo_table[] = | |
1109 | { | |
43cd72b9 BW |
1110 | { "align", s_align_bytes, 0 }, /* Defaulting is invalid (0). */ |
1111 | { "literal_position", xtensa_literal_position, 0 }, | |
1112 | { "frame", s_ignore, 0 }, /* Formerly used for STABS debugging. */ | |
1113 | { "long", xtensa_elf_cons, 4 }, | |
1114 | { "word", xtensa_elf_cons, 4 }, | |
1bbb5f21 | 1115 | { "4byte", xtensa_elf_cons, 4 }, |
43cd72b9 | 1116 | { "short", xtensa_elf_cons, 2 }, |
1bbb5f21 | 1117 | { "2byte", xtensa_elf_cons, 2 }, |
fb227da0 BW |
1118 | { "sleb128", xtensa_leb128, 1}, |
1119 | { "uleb128", xtensa_leb128, 0}, | |
43cd72b9 BW |
1120 | { "begin", xtensa_begin_directive, 0 }, |
1121 | { "end", xtensa_end_directive, 0 }, | |
43cd72b9 BW |
1122 | { "literal", xtensa_literal_pseudo, 0 }, |
1123 | { "frequency", xtensa_frequency_pseudo, 0 }, | |
1124 | { NULL, 0, 0 }, | |
e0001a05 NC |
1125 | }; |
1126 | ||
1127 | ||
7fa3d080 BW |
1128 | static bfd_boolean |
1129 | use_transform (void) | |
e0001a05 | 1130 | { |
43cd72b9 BW |
1131 | /* After md_end, you should be checking frag by frag, rather |
1132 | than state directives. */ | |
9c2799c2 | 1133 | gas_assert (!past_xtensa_end); |
43cd72b9 | 1134 | return directive_state[directive_transform]; |
e0001a05 NC |
1135 | } |
1136 | ||
1137 | ||
7fa3d080 BW |
1138 | static bfd_boolean |
1139 | do_align_targets (void) | |
e0001a05 | 1140 | { |
7b1cc377 BW |
1141 | /* Do not use this function after md_end; just look at align_targets |
1142 | instead. There is no target-align directive, so alignment is either | |
1143 | enabled for all frags or not done at all. */ | |
9c2799c2 | 1144 | gas_assert (!past_xtensa_end); |
43cd72b9 | 1145 | return align_targets && use_transform (); |
e0001a05 NC |
1146 | } |
1147 | ||
1148 | ||
1149 | static void | |
7fa3d080 | 1150 | directive_push (directiveE directive, bfd_boolean negated, const void *datum) |
e0001a05 | 1151 | { |
3b4dbbbf | 1152 | const char *file; |
e0001a05 | 1153 | unsigned int line; |
325801bd | 1154 | state_stackS *stack = XNEW (state_stackS); |
e0001a05 | 1155 | |
3b4dbbbf | 1156 | file = as_where (&line); |
e0001a05 NC |
1157 | |
1158 | stack->directive = directive; | |
1159 | stack->negated = negated; | |
1160 | stack->old_state = directive_state[directive]; | |
1161 | stack->file = file; | |
1162 | stack->line = line; | |
1163 | stack->datum = datum; | |
1164 | stack->prev = directive_state_stack; | |
1165 | directive_state_stack = stack; | |
1166 | ||
1167 | directive_state[directive] = !negated; | |
1168 | } | |
1169 | ||
7fa3d080 | 1170 | |
e0001a05 | 1171 | static void |
7fa3d080 BW |
1172 | directive_pop (directiveE *directive, |
1173 | bfd_boolean *negated, | |
1174 | const char **file, | |
1175 | unsigned int *line, | |
1176 | const void **datum) | |
e0001a05 NC |
1177 | { |
1178 | state_stackS *top = directive_state_stack; | |
1179 | ||
1180 | if (!directive_state_stack) | |
1181 | { | |
33eaf5de | 1182 | as_bad (_("unmatched .end directive")); |
e0001a05 NC |
1183 | *directive = directive_none; |
1184 | return; | |
1185 | } | |
1186 | ||
1187 | directive_state[directive_state_stack->directive] = top->old_state; | |
1188 | *directive = top->directive; | |
1189 | *negated = top->negated; | |
1190 | *file = top->file; | |
1191 | *line = top->line; | |
1192 | *datum = top->datum; | |
1193 | directive_state_stack = top->prev; | |
1194 | free (top); | |
1195 | } | |
1196 | ||
1197 | ||
1198 | static void | |
7fa3d080 | 1199 | directive_balance (void) |
e0001a05 NC |
1200 | { |
1201 | while (directive_state_stack) | |
1202 | { | |
1203 | directiveE directive; | |
1204 | bfd_boolean negated; | |
1205 | const char *file; | |
1206 | unsigned int line; | |
1207 | const void *datum; | |
1208 | ||
1209 | directive_pop (&directive, &negated, &file, &line, &datum); | |
1210 | as_warn_where ((char *) file, line, | |
1211 | _(".begin directive with no matching .end directive")); | |
1212 | } | |
1213 | } | |
1214 | ||
1215 | ||
1216 | static bfd_boolean | |
7fa3d080 | 1217 | inside_directive (directiveE dir) |
e0001a05 NC |
1218 | { |
1219 | state_stackS *top = directive_state_stack; | |
1220 | ||
1221 | while (top && top->directive != dir) | |
1222 | top = top->prev; | |
1223 | ||
1224 | return (top != NULL); | |
1225 | } | |
1226 | ||
1227 | ||
1228 | static void | |
7fa3d080 | 1229 | get_directive (directiveE *directive, bfd_boolean *negated) |
e0001a05 NC |
1230 | { |
1231 | int len; | |
1232 | unsigned i; | |
b9bb4a93 | 1233 | const char *directive_string; |
e0001a05 NC |
1234 | |
1235 | if (strncmp (input_line_pointer, "no-", 3) != 0) | |
1236 | *negated = FALSE; | |
1237 | else | |
1238 | { | |
1239 | *negated = TRUE; | |
1240 | input_line_pointer += 3; | |
1241 | } | |
1242 | ||
1243 | len = strspn (input_line_pointer, | |
43cd72b9 BW |
1244 | "abcdefghijklmnopqrstuvwxyz_-/0123456789."); |
1245 | ||
1246 | /* This code is a hack to make .begin [no-][generics|relax] exactly | |
1247 | equivalent to .begin [no-]transform. We should remove it when | |
1248 | we stop accepting those options. */ | |
c138bc38 | 1249 | |
43cd72b9 BW |
1250 | if (strncmp (input_line_pointer, "generics", strlen ("generics")) == 0) |
1251 | { | |
1252 | as_warn (_("[no-]generics is deprecated; use [no-]transform instead")); | |
1253 | directive_string = "transform"; | |
1254 | } | |
1255 | else if (strncmp (input_line_pointer, "relax", strlen ("relax")) == 0) | |
1256 | { | |
1257 | as_warn (_("[no-]relax is deprecated; use [no-]transform instead")); | |
1258 | directive_string = "transform"; | |
c138bc38 | 1259 | } |
43cd72b9 BW |
1260 | else |
1261 | directive_string = input_line_pointer; | |
e0001a05 NC |
1262 | |
1263 | for (i = 0; i < sizeof (directive_info) / sizeof (*directive_info); ++i) | |
1264 | { | |
43cd72b9 | 1265 | if (strncmp (directive_string, directive_info[i].name, len) == 0) |
e0001a05 NC |
1266 | { |
1267 | input_line_pointer += len; | |
1268 | *directive = (directiveE) i; | |
1269 | if (*negated && !directive_info[i].can_be_negated) | |
43cd72b9 | 1270 | as_bad (_("directive %s cannot be negated"), |
e0001a05 NC |
1271 | directive_info[i].name); |
1272 | return; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | as_bad (_("unknown directive")); | |
1277 | *directive = (directiveE) XTENSA_UNDEFINED; | |
1278 | } | |
1279 | ||
1280 | ||
1281 | static void | |
7fa3d080 | 1282 | xtensa_begin_directive (int ignore ATTRIBUTE_UNUSED) |
e0001a05 NC |
1283 | { |
1284 | directiveE directive; | |
1285 | bfd_boolean negated; | |
1286 | emit_state *state; | |
e0001a05 NC |
1287 | lit_state *ls; |
1288 | ||
1289 | get_directive (&directive, &negated); | |
1290 | if (directive == (directiveE) XTENSA_UNDEFINED) | |
1291 | { | |
1292 | discard_rest_of_line (); | |
1293 | return; | |
1294 | } | |
1295 | ||
43cd72b9 BW |
1296 | if (cur_vinsn.inside_bundle) |
1297 | as_bad (_("directives are not valid inside bundles")); | |
1298 | ||
e0001a05 NC |
1299 | switch (directive) |
1300 | { | |
1301 | case directive_literal: | |
82e7541d BW |
1302 | if (!inside_directive (directive_literal)) |
1303 | { | |
1304 | /* Previous labels go with whatever follows this directive, not with | |
1305 | the literal, so save them now. */ | |
1306 | saved_insn_labels = insn_labels; | |
1307 | insn_labels = NULL; | |
1308 | } | |
43cd72b9 | 1309 | as_warn (_(".begin literal is deprecated; use .literal instead")); |
325801bd | 1310 | state = XNEW (emit_state); |
e0001a05 NC |
1311 | xtensa_switch_to_literal_fragment (state); |
1312 | directive_push (directive_literal, negated, state); | |
1313 | break; | |
1314 | ||
1315 | case directive_literal_prefix: | |
c138bc38 | 1316 | /* Have to flush pending output because a movi relaxed to an l32r |
43cd72b9 BW |
1317 | might produce a literal. */ |
1318 | md_flush_pending_output (); | |
e0001a05 NC |
1319 | /* Check to see if the current fragment is a literal |
1320 | fragment. If it is, then this operation is not allowed. */ | |
43cd72b9 | 1321 | if (generating_literals) |
e0001a05 NC |
1322 | { |
1323 | as_bad (_("cannot set literal_prefix inside literal fragment")); | |
1324 | return; | |
1325 | } | |
1326 | ||
1327 | /* Allocate the literal state for this section and push | |
1328 | onto the directive stack. */ | |
325801bd | 1329 | ls = XNEW (lit_state); |
9c2799c2 | 1330 | gas_assert (ls); |
e0001a05 NC |
1331 | |
1332 | *ls = default_lit_sections; | |
e0001a05 NC |
1333 | directive_push (directive_literal_prefix, negated, ls); |
1334 | ||
e0001a05 | 1335 | /* Process the new prefix. */ |
74869ac7 | 1336 | xtensa_literal_prefix (); |
e0001a05 NC |
1337 | break; |
1338 | ||
1339 | case directive_freeregs: | |
1340 | /* This information is currently unused, but we'll accept the statement | |
1341 | and just discard the rest of the line. This won't check the syntax, | |
1342 | but it will accept every correct freeregs directive. */ | |
1343 | input_line_pointer += strcspn (input_line_pointer, "\n"); | |
1344 | directive_push (directive_freeregs, negated, 0); | |
1345 | break; | |
1346 | ||
43cd72b9 BW |
1347 | case directive_schedule: |
1348 | md_flush_pending_output (); | |
1349 | frag_var (rs_fill, 0, 0, frag_now->fr_subtype, | |
1350 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
1351 | directive_push (directive_schedule, negated, 0); | |
1352 | xtensa_set_frag_assembly_state (frag_now); | |
1353 | break; | |
1354 | ||
e0001a05 | 1355 | case directive_density: |
43cd72b9 BW |
1356 | as_warn (_(".begin [no-]density is ignored")); |
1357 | break; | |
1358 | ||
1359 | case directive_absolute_literals: | |
1360 | md_flush_pending_output (); | |
1361 | if (!absolute_literals_supported && !negated) | |
e0001a05 | 1362 | { |
43cd72b9 | 1363 | as_warn (_("Xtensa absolute literals option not supported; ignored")); |
e0001a05 NC |
1364 | break; |
1365 | } | |
43cd72b9 BW |
1366 | xtensa_set_frag_assembly_state (frag_now); |
1367 | directive_push (directive, negated, 0); | |
1368 | break; | |
e0001a05 NC |
1369 | |
1370 | default: | |
43cd72b9 BW |
1371 | md_flush_pending_output (); |
1372 | xtensa_set_frag_assembly_state (frag_now); | |
e0001a05 NC |
1373 | directive_push (directive, negated, 0); |
1374 | break; | |
1375 | } | |
1376 | ||
1377 | demand_empty_rest_of_line (); | |
1378 | } | |
1379 | ||
1380 | ||
1381 | static void | |
7fa3d080 | 1382 | xtensa_end_directive (int ignore ATTRIBUTE_UNUSED) |
e0001a05 NC |
1383 | { |
1384 | directiveE begin_directive, end_directive; | |
1385 | bfd_boolean begin_negated, end_negated; | |
1386 | const char *file; | |
1387 | unsigned int line; | |
1388 | emit_state *state; | |
43cd72b9 | 1389 | emit_state **state_ptr; |
e0001a05 NC |
1390 | lit_state *s; |
1391 | ||
43cd72b9 BW |
1392 | if (cur_vinsn.inside_bundle) |
1393 | as_bad (_("directives are not valid inside bundles")); | |
82e7541d | 1394 | |
e0001a05 | 1395 | get_directive (&end_directive, &end_negated); |
43cd72b9 BW |
1396 | |
1397 | md_flush_pending_output (); | |
1398 | ||
87975d2a | 1399 | switch ((int) end_directive) |
e0001a05 | 1400 | { |
87975d2a | 1401 | case XTENSA_UNDEFINED: |
e0001a05 NC |
1402 | discard_rest_of_line (); |
1403 | return; | |
e0001a05 | 1404 | |
87975d2a | 1405 | case (int) directive_density: |
43cd72b9 | 1406 | as_warn (_(".end [no-]density is ignored")); |
e0001a05 | 1407 | demand_empty_rest_of_line (); |
43cd72b9 BW |
1408 | break; |
1409 | ||
87975d2a | 1410 | case (int) directive_absolute_literals: |
43cd72b9 BW |
1411 | if (!absolute_literals_supported && !end_negated) |
1412 | { | |
1413 | as_warn (_("Xtensa absolute literals option not supported; ignored")); | |
1414 | demand_empty_rest_of_line (); | |
1415 | return; | |
1416 | } | |
1417 | break; | |
1418 | ||
1419 | default: | |
1420 | break; | |
e0001a05 NC |
1421 | } |
1422 | ||
43cd72b9 | 1423 | state_ptr = &state; /* use state_ptr to avoid type-punning warning */ |
e0001a05 | 1424 | directive_pop (&begin_directive, &begin_negated, &file, &line, |
43cd72b9 | 1425 | (const void **) state_ptr); |
e0001a05 NC |
1426 | |
1427 | if (begin_directive != directive_none) | |
1428 | { | |
1429 | if (begin_directive != end_directive || begin_negated != end_negated) | |
1430 | { | |
1431 | as_bad (_("does not match begin %s%s at %s:%d"), | |
1432 | begin_negated ? "no-" : "", | |
1433 | directive_info[begin_directive].name, file, line); | |
1434 | } | |
1435 | else | |
1436 | { | |
1437 | switch (end_directive) | |
1438 | { | |
1439 | case directive_literal: | |
1440 | frag_var (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
1441 | xtensa_restore_emit_state (state); | |
43cd72b9 | 1442 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 1443 | free (state); |
82e7541d BW |
1444 | if (!inside_directive (directive_literal)) |
1445 | { | |
1446 | /* Restore the list of current labels. */ | |
1447 | xtensa_clear_insn_labels (); | |
1448 | insn_labels = saved_insn_labels; | |
1449 | } | |
e0001a05 NC |
1450 | break; |
1451 | ||
e0001a05 NC |
1452 | case directive_literal_prefix: |
1453 | /* Restore the default collection sections from saved state. */ | |
1454 | s = (lit_state *) state; | |
9c2799c2 | 1455 | gas_assert (s); |
e8247da7 | 1456 | default_lit_sections = *s; |
e0001a05 | 1457 | |
74869ac7 BW |
1458 | /* Free the state storage. */ |
1459 | free (s->lit_prefix); | |
e0001a05 NC |
1460 | free (s); |
1461 | break; | |
1462 | ||
43cd72b9 BW |
1463 | case directive_schedule: |
1464 | case directive_freeregs: | |
1465 | break; | |
1466 | ||
e0001a05 | 1467 | default: |
43cd72b9 | 1468 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
1469 | break; |
1470 | } | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | demand_empty_rest_of_line (); | |
1475 | } | |
1476 | ||
1477 | ||
1478 | /* Place an aligned literal fragment at the current location. */ | |
1479 | ||
1480 | static void | |
7fa3d080 | 1481 | xtensa_literal_position (int ignore ATTRIBUTE_UNUSED) |
e0001a05 | 1482 | { |
43cd72b9 BW |
1483 | md_flush_pending_output (); |
1484 | ||
e0001a05 NC |
1485 | if (inside_directive (directive_literal)) |
1486 | as_warn (_(".literal_position inside literal directive; ignoring")); | |
43cd72b9 | 1487 | xtensa_mark_literal_pool_location (); |
e0001a05 NC |
1488 | |
1489 | demand_empty_rest_of_line (); | |
82e7541d | 1490 | xtensa_clear_insn_labels (); |
e0001a05 NC |
1491 | } |
1492 | ||
1493 | ||
43cd72b9 | 1494 | /* Support .literal label, expr, ... */ |
e0001a05 NC |
1495 | |
1496 | static void | |
7fa3d080 | 1497 | xtensa_literal_pseudo (int ignored ATTRIBUTE_UNUSED) |
e0001a05 NC |
1498 | { |
1499 | emit_state state; | |
1745fcba | 1500 | char *p, *base_name; |
e0001a05 | 1501 | char c; |
e0001a05 NC |
1502 | segT dest_seg; |
1503 | ||
82e7541d BW |
1504 | if (inside_directive (directive_literal)) |
1505 | { | |
1506 | as_bad (_(".literal not allowed inside .begin literal region")); | |
1507 | ignore_rest_of_line (); | |
1508 | return; | |
1509 | } | |
1510 | ||
43cd72b9 BW |
1511 | md_flush_pending_output (); |
1512 | ||
82e7541d BW |
1513 | /* Previous labels go with whatever follows this directive, not with |
1514 | the literal, so save them now. */ | |
1515 | saved_insn_labels = insn_labels; | |
1516 | insn_labels = NULL; | |
1517 | ||
e0001a05 NC |
1518 | /* If we are using text-section literals, then this is the right value... */ |
1519 | dest_seg = now_seg; | |
1520 | ||
1521 | base_name = input_line_pointer; | |
1522 | ||
1523 | xtensa_switch_to_literal_fragment (&state); | |
1524 | ||
43cd72b9 | 1525 | /* ...but if we aren't using text-section-literals, then we |
e0001a05 | 1526 | need to put them in the section we just switched to. */ |
43cd72b9 | 1527 | if (use_literal_section || directive_state[directive_absolute_literals]) |
e0001a05 NC |
1528 | dest_seg = now_seg; |
1529 | ||
87975d2a AM |
1530 | /* FIXME, despite the previous comments, dest_seg is unused... */ |
1531 | (void) dest_seg; | |
1532 | ||
43cd72b9 BW |
1533 | /* All literals are aligned to four-byte boundaries. */ |
1534 | frag_align (2, 0, 0); | |
1535 | record_alignment (now_seg, 2); | |
e0001a05 | 1536 | |
d02603dc | 1537 | c = get_symbol_name (&base_name); |
e0001a05 NC |
1538 | /* Just after name is now '\0'. */ |
1539 | p = input_line_pointer; | |
1540 | *p = c; | |
d02603dc | 1541 | SKIP_WHITESPACE_AFTER_NAME (); |
e0001a05 NC |
1542 | |
1543 | if (*input_line_pointer != ',' && *input_line_pointer != ':') | |
1544 | { | |
1545 | as_bad (_("expected comma or colon after symbol name; " | |
1546 | "rest of line ignored")); | |
1547 | ignore_rest_of_line (); | |
1548 | xtensa_restore_emit_state (&state); | |
1549 | return; | |
1550 | } | |
e0001a05 | 1551 | |
d02603dc | 1552 | *p = 0; |
e0001a05 | 1553 | colon (base_name); |
e0001a05 | 1554 | *p = c; |
d02603dc | 1555 | |
43cd72b9 | 1556 | input_line_pointer++; /* skip ',' or ':' */ |
e0001a05 | 1557 | |
43cd72b9 | 1558 | xtensa_elf_cons (4); |
e0001a05 NC |
1559 | |
1560 | xtensa_restore_emit_state (&state); | |
82e7541d BW |
1561 | |
1562 | /* Restore the list of current labels. */ | |
1563 | xtensa_clear_insn_labels (); | |
1564 | insn_labels = saved_insn_labels; | |
e0001a05 NC |
1565 | } |
1566 | ||
1567 | ||
1568 | static void | |
74869ac7 | 1569 | xtensa_literal_prefix (void) |
e0001a05 | 1570 | { |
74869ac7 BW |
1571 | char *name; |
1572 | int len; | |
1573 | ||
1574 | /* Parse the new prefix from the input_line_pointer. */ | |
1575 | SKIP_WHITESPACE (); | |
1576 | len = strspn (input_line_pointer, | |
1577 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ" | |
1578 | "abcdefghijklmnopqrstuvwxyz_/0123456789.$"); | |
e0001a05 NC |
1579 | |
1580 | /* Get a null-terminated copy of the name. */ | |
29a2809e | 1581 | name = xmemdup0 (input_line_pointer, len); |
e0001a05 | 1582 | |
74869ac7 BW |
1583 | /* Skip the name in the input line. */ |
1584 | input_line_pointer += len; | |
43cd72b9 | 1585 | |
74869ac7 | 1586 | default_lit_sections.lit_prefix = name; |
43cd72b9 | 1587 | |
74869ac7 | 1588 | /* Clear cached literal sections, since the prefix has changed. */ |
43cd72b9 BW |
1589 | default_lit_sections.lit_seg = NULL; |
1590 | default_lit_sections.lit4_seg = NULL; | |
43cd72b9 BW |
1591 | } |
1592 | ||
1593 | ||
1594 | /* Support ".frequency branch_target_frequency fall_through_frequency". */ | |
1595 | ||
1596 | static void | |
7fa3d080 | 1597 | xtensa_frequency_pseudo (int ignored ATTRIBUTE_UNUSED) |
43cd72b9 BW |
1598 | { |
1599 | float fall_through_f, target_f; | |
43cd72b9 BW |
1600 | |
1601 | fall_through_f = (float) strtod (input_line_pointer, &input_line_pointer); | |
1602 | if (fall_through_f < 0) | |
1603 | { | |
1604 | as_bad (_("fall through frequency must be greater than 0")); | |
1605 | ignore_rest_of_line (); | |
1606 | return; | |
1607 | } | |
1608 | ||
1609 | target_f = (float) strtod (input_line_pointer, &input_line_pointer); | |
1610 | if (target_f < 0) | |
1611 | { | |
1612 | as_bad (_("branch target frequency must be greater than 0")); | |
1613 | ignore_rest_of_line (); | |
1614 | return; | |
1615 | } | |
1616 | ||
b08b5071 | 1617 | set_subseg_freq (now_seg, now_subseg, target_f + fall_through_f, target_f); |
43cd72b9 BW |
1618 | |
1619 | demand_empty_rest_of_line (); | |
1620 | } | |
1621 | ||
1622 | ||
1623 | /* Like normal .long/.short/.word, except support @plt, etc. | |
1624 | Clobbers input_line_pointer, checks end-of-line. */ | |
1625 | ||
1626 | static void | |
7fa3d080 | 1627 | xtensa_elf_cons (int nbytes) |
43cd72b9 BW |
1628 | { |
1629 | expressionS exp; | |
1630 | bfd_reloc_code_real_type reloc; | |
1631 | ||
1632 | md_flush_pending_output (); | |
1633 | ||
1634 | if (cur_vinsn.inside_bundle) | |
1635 | as_bad (_("directives are not valid inside bundles")); | |
1636 | ||
1637 | if (is_it_end_of_statement ()) | |
1638 | { | |
1639 | demand_empty_rest_of_line (); | |
1640 | return; | |
1641 | } | |
1642 | ||
1643 | do | |
1644 | { | |
1645 | expression (&exp); | |
1646 | if (exp.X_op == O_symbol | |
1647 | && *input_line_pointer == '@' | |
1648 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, &exp)) | |
1649 | != BFD_RELOC_NONE)) | |
1650 | { | |
1651 | reloc_howto_type *reloc_howto = | |
1652 | bfd_reloc_type_lookup (stdoutput, reloc); | |
1653 | ||
1654 | if (reloc == BFD_RELOC_UNUSED || !reloc_howto) | |
1655 | as_bad (_("unsupported relocation")); | |
1656 | else if ((reloc >= BFD_RELOC_XTENSA_SLOT0_OP | |
1657 | && reloc <= BFD_RELOC_XTENSA_SLOT14_OP) | |
1658 | || (reloc >= BFD_RELOC_XTENSA_SLOT0_ALT | |
1659 | && reloc <= BFD_RELOC_XTENSA_SLOT14_ALT)) | |
1660 | as_bad (_("opcode-specific %s relocation used outside " | |
1661 | "an instruction"), reloc_howto->name); | |
1662 | else if (nbytes != (int) bfd_get_reloc_size (reloc_howto)) | |
1663 | as_bad (_("%s relocations do not fit in %d bytes"), | |
1664 | reloc_howto->name, nbytes); | |
28dbbc02 BW |
1665 | else if (reloc == BFD_RELOC_XTENSA_TLS_FUNC |
1666 | || reloc == BFD_RELOC_XTENSA_TLS_ARG | |
1667 | || reloc == BFD_RELOC_XTENSA_TLS_CALL) | |
1668 | as_bad (_("invalid use of %s relocation"), reloc_howto->name); | |
43cd72b9 BW |
1669 | else |
1670 | { | |
1671 | char *p = frag_more ((int) nbytes); | |
1672 | xtensa_set_frag_assembly_state (frag_now); | |
1673 | fix_new_exp (frag_now, p - frag_now->fr_literal, | |
1bbb5f21 | 1674 | nbytes, &exp, reloc_howto->pc_relative, reloc); |
43cd72b9 BW |
1675 | } |
1676 | } | |
1677 | else | |
1f7efbae BW |
1678 | { |
1679 | xtensa_set_frag_assembly_state (frag_now); | |
1680 | emit_expr (&exp, (unsigned int) nbytes); | |
1681 | } | |
43cd72b9 BW |
1682 | } |
1683 | while (*input_line_pointer++ == ','); | |
1684 | ||
1685 | input_line_pointer--; /* Put terminator back into stream. */ | |
1686 | demand_empty_rest_of_line (); | |
1687 | } | |
1688 | ||
fb227da0 BW |
1689 | static bfd_boolean is_leb128_expr; |
1690 | ||
1691 | static void | |
1692 | xtensa_leb128 (int sign) | |
1693 | { | |
1694 | is_leb128_expr = TRUE; | |
1695 | s_leb128 (sign); | |
1696 | is_leb128_expr = FALSE; | |
1697 | } | |
1698 | ||
7fa3d080 BW |
1699 | \f |
1700 | /* Parsing and Idiom Translation. */ | |
43cd72b9 BW |
1701 | |
1702 | /* Parse @plt, etc. and return the desired relocation. */ | |
1703 | static bfd_reloc_code_real_type | |
7fa3d080 | 1704 | xtensa_elf_suffix (char **str_p, expressionS *exp_p) |
43cd72b9 | 1705 | { |
43cd72b9 BW |
1706 | char ident[20]; |
1707 | char *str = *str_p; | |
1708 | char *str2; | |
1709 | int ch; | |
1710 | int len; | |
e066bf5f | 1711 | unsigned int i; |
43cd72b9 BW |
1712 | |
1713 | if (*str++ != '@') | |
1714 | return BFD_RELOC_NONE; | |
1715 | ||
1716 | for (ch = *str, str2 = ident; | |
1717 | (str2 < ident + sizeof (ident) - 1 | |
1718 | && (ISALNUM (ch) || ch == '@')); | |
1719 | ch = *++str) | |
1720 | { | |
1721 | *str2++ = (ISLOWER (ch)) ? ch : TOLOWER (ch); | |
1722 | } | |
1723 | ||
1724 | *str2 = '\0'; | |
1725 | len = str2 - ident; | |
1726 | ||
1727 | ch = ident[0]; | |
e066bf5f TS |
1728 | for (i = 0; i < ARRAY_SIZE (suffix_relocs); i++) |
1729 | if (ch == suffix_relocs[i].suffix[0] | |
1730 | && len == suffix_relocs[i].length | |
1731 | && memcmp (ident, suffix_relocs[i].suffix, suffix_relocs[i].length) == 0) | |
43cd72b9 BW |
1732 | { |
1733 | /* Now check for "identifier@suffix+constant". */ | |
1734 | if (*str == '-' || *str == '+') | |
1735 | { | |
1736 | char *orig_line = input_line_pointer; | |
1737 | expressionS new_exp; | |
1738 | ||
1739 | input_line_pointer = str; | |
1740 | expression (&new_exp); | |
1741 | if (new_exp.X_op == O_constant) | |
1742 | { | |
1743 | exp_p->X_add_number += new_exp.X_add_number; | |
1744 | str = input_line_pointer; | |
1745 | } | |
1746 | ||
1747 | if (&input_line_pointer != str_p) | |
1748 | input_line_pointer = orig_line; | |
1749 | } | |
1750 | ||
1751 | *str_p = str; | |
e066bf5f | 1752 | return suffix_relocs[i].reloc; |
43cd72b9 BW |
1753 | } |
1754 | ||
1755 | return BFD_RELOC_UNUSED; | |
e0001a05 NC |
1756 | } |
1757 | ||
e0001a05 | 1758 | |
bbdd25a8 | 1759 | /* Find the matching operator type. */ |
cc34adb2 | 1760 | static operatorT |
bbdd25a8 BW |
1761 | map_suffix_reloc_to_operator (bfd_reloc_code_real_type reloc) |
1762 | { | |
cc34adb2 | 1763 | operatorT operator = O_illegal; |
e066bf5f | 1764 | unsigned int i; |
3739860c | 1765 | |
e066bf5f | 1766 | for (i = 0; i < ARRAY_SIZE (suffix_relocs); i++) |
bbdd25a8 | 1767 | { |
e066bf5f | 1768 | if (suffix_relocs[i].reloc == reloc) |
bbdd25a8 | 1769 | { |
e066bf5f | 1770 | operator = suffix_relocs[i].operator; |
bbdd25a8 BW |
1771 | break; |
1772 | } | |
1773 | } | |
cc34adb2 | 1774 | gas_assert (operator != O_illegal); |
bbdd25a8 BW |
1775 | return operator; |
1776 | } | |
1777 | ||
1778 | ||
1779 | /* Find the matching reloc type. */ | |
1780 | static bfd_reloc_code_real_type | |
28dbbc02 | 1781 | map_operator_to_reloc (unsigned char operator, bfd_boolean is_literal) |
bbdd25a8 | 1782 | { |
e066bf5f | 1783 | unsigned int i; |
bbdd25a8 BW |
1784 | bfd_reloc_code_real_type reloc = BFD_RELOC_UNUSED; |
1785 | ||
e066bf5f | 1786 | for (i = 0; i < ARRAY_SIZE (suffix_relocs); i++) |
bbdd25a8 | 1787 | { |
e066bf5f | 1788 | if (suffix_relocs[i].operator == operator) |
bbdd25a8 | 1789 | { |
e066bf5f | 1790 | reloc = suffix_relocs[i].reloc; |
bbdd25a8 BW |
1791 | break; |
1792 | } | |
1793 | } | |
1794 | ||
28dbbc02 BW |
1795 | if (is_literal) |
1796 | { | |
1797 | if (reloc == BFD_RELOC_XTENSA_TLS_FUNC) | |
1798 | return BFD_RELOC_XTENSA_TLSDESC_FN; | |
1799 | else if (reloc == BFD_RELOC_XTENSA_TLS_ARG) | |
1800 | return BFD_RELOC_XTENSA_TLSDESC_ARG; | |
1801 | } | |
1802 | ||
bbdd25a8 BW |
1803 | if (reloc == BFD_RELOC_UNUSED) |
1804 | return BFD_RELOC_32; | |
1805 | ||
1806 | return reloc; | |
1807 | } | |
1808 | ||
1809 | ||
e0001a05 | 1810 | static const char * |
7fa3d080 | 1811 | expression_end (const char *name) |
e0001a05 NC |
1812 | { |
1813 | while (1) | |
1814 | { | |
1815 | switch (*name) | |
1816 | { | |
43cd72b9 | 1817 | case '}': |
e0001a05 NC |
1818 | case ';': |
1819 | case '\0': | |
1820 | case ',': | |
43cd72b9 | 1821 | case ':': |
e0001a05 NC |
1822 | return name; |
1823 | case ' ': | |
1824 | case '\t': | |
1825 | ++name; | |
1826 | continue; | |
1827 | default: | |
1828 | return 0; | |
1829 | } | |
1830 | } | |
1831 | } | |
1832 | ||
1833 | ||
1834 | #define ERROR_REG_NUM ((unsigned) -1) | |
1835 | ||
1836 | static unsigned | |
7fa3d080 | 1837 | tc_get_register (const char *prefix) |
e0001a05 NC |
1838 | { |
1839 | unsigned reg; | |
1840 | const char *next_expr; | |
1841 | const char *old_line_pointer; | |
1842 | ||
1843 | SKIP_WHITESPACE (); | |
1844 | old_line_pointer = input_line_pointer; | |
1845 | ||
1846 | if (*input_line_pointer == '$') | |
1847 | ++input_line_pointer; | |
1848 | ||
1849 | /* Accept "sp" as a synonym for "a1". */ | |
1850 | if (input_line_pointer[0] == 's' && input_line_pointer[1] == 'p' | |
1851 | && expression_end (input_line_pointer + 2)) | |
1852 | { | |
1853 | input_line_pointer += 2; | |
1854 | return 1; /* AR[1] */ | |
1855 | } | |
1856 | ||
1857 | while (*input_line_pointer++ == *prefix++) | |
1858 | ; | |
1859 | --input_line_pointer; | |
1860 | --prefix; | |
1861 | ||
1862 | if (*prefix) | |
1863 | { | |
1864 | as_bad (_("bad register name: %s"), old_line_pointer); | |
1865 | return ERROR_REG_NUM; | |
1866 | } | |
1867 | ||
1868 | if (!ISDIGIT ((unsigned char) *input_line_pointer)) | |
1869 | { | |
1870 | as_bad (_("bad register number: %s"), input_line_pointer); | |
1871 | return ERROR_REG_NUM; | |
1872 | } | |
1873 | ||
1874 | reg = 0; | |
1875 | ||
1876 | while (ISDIGIT ((int) *input_line_pointer)) | |
1877 | reg = reg * 10 + *input_line_pointer++ - '0'; | |
1878 | ||
1879 | if (!(next_expr = expression_end (input_line_pointer))) | |
1880 | { | |
1881 | as_bad (_("bad register name: %s"), old_line_pointer); | |
1882 | return ERROR_REG_NUM; | |
1883 | } | |
1884 | ||
1885 | input_line_pointer = (char *) next_expr; | |
1886 | ||
1887 | return reg; | |
1888 | } | |
1889 | ||
1890 | ||
e0001a05 | 1891 | static void |
7fa3d080 | 1892 | expression_maybe_register (xtensa_opcode opc, int opnd, expressionS *tok) |
e0001a05 | 1893 | { |
43cd72b9 | 1894 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 | 1895 | |
43cd72b9 BW |
1896 | /* Check if this is an immediate operand. */ |
1897 | if (xtensa_operand_is_register (isa, opc, opnd) == 0) | |
e0001a05 | 1898 | { |
43cd72b9 | 1899 | bfd_reloc_code_real_type reloc; |
e0001a05 | 1900 | segT t = expression (tok); |
91d6fa6a | 1901 | |
43cd72b9 BW |
1902 | if (t == absolute_section |
1903 | && xtensa_operand_is_PCrelative (isa, opc, opnd) == 1) | |
e0001a05 | 1904 | { |
9c2799c2 | 1905 | gas_assert (tok->X_op == O_constant); |
e0001a05 NC |
1906 | tok->X_op = O_symbol; |
1907 | tok->X_add_symbol = &abs_symbol; | |
1908 | } | |
43cd72b9 BW |
1909 | |
1910 | if ((tok->X_op == O_constant || tok->X_op == O_symbol) | |
bbdd25a8 BW |
1911 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, tok)) |
1912 | != BFD_RELOC_NONE)) | |
e0001a05 | 1913 | { |
1bbb5f21 | 1914 | switch (reloc) |
43cd72b9 | 1915 | { |
1bbb5f21 BW |
1916 | case BFD_RELOC_LO16: |
1917 | if (tok->X_op == O_constant) | |
bbdd25a8 | 1918 | { |
43cd72b9 | 1919 | tok->X_add_number &= 0xffff; |
bbdd25a8 | 1920 | return; |
1bbb5f21 BW |
1921 | } |
1922 | break; | |
1923 | case BFD_RELOC_HI16: | |
1924 | if (tok->X_op == O_constant) | |
1925 | { | |
43cd72b9 | 1926 | tok->X_add_number = ((unsigned) tok->X_add_number) >> 16; |
bbdd25a8 | 1927 | return; |
bbdd25a8 | 1928 | } |
1bbb5f21 BW |
1929 | break; |
1930 | case BFD_RELOC_UNUSED: | |
1931 | as_bad (_("unsupported relocation")); | |
1932 | return; | |
1933 | case BFD_RELOC_32_PCREL: | |
1934 | as_bad (_("pcrel relocation not allowed in an instruction")); | |
1935 | return; | |
1936 | default: | |
1937 | break; | |
43cd72b9 | 1938 | } |
bbdd25a8 | 1939 | tok->X_op = map_suffix_reloc_to_operator (reloc); |
e0001a05 | 1940 | } |
e0001a05 NC |
1941 | } |
1942 | else | |
1943 | { | |
43cd72b9 BW |
1944 | xtensa_regfile opnd_rf = xtensa_operand_regfile (isa, opc, opnd); |
1945 | unsigned reg = tc_get_register (xtensa_regfile_shortname (isa, opnd_rf)); | |
e0001a05 NC |
1946 | |
1947 | if (reg != ERROR_REG_NUM) /* Already errored */ | |
1948 | { | |
1949 | uint32 buf = reg; | |
43cd72b9 | 1950 | if (xtensa_operand_encode (isa, opc, opnd, &buf)) |
e0001a05 NC |
1951 | as_bad (_("register number out of range")); |
1952 | } | |
1953 | ||
1954 | tok->X_op = O_register; | |
1955 | tok->X_add_symbol = 0; | |
1956 | tok->X_add_number = reg; | |
1957 | } | |
1958 | } | |
1959 | ||
1960 | ||
1961 | /* Split up the arguments for an opcode or pseudo-op. */ | |
1962 | ||
1963 | static int | |
7fa3d080 | 1964 | tokenize_arguments (char **args, char *str) |
e0001a05 NC |
1965 | { |
1966 | char *old_input_line_pointer; | |
1967 | bfd_boolean saw_comma = FALSE; | |
1968 | bfd_boolean saw_arg = FALSE; | |
43cd72b9 | 1969 | bfd_boolean saw_colon = FALSE; |
e0001a05 NC |
1970 | int num_args = 0; |
1971 | char *arg_end, *arg; | |
1972 | int arg_len; | |
43cd72b9 BW |
1973 | |
1974 | /* Save and restore input_line_pointer around this function. */ | |
e0001a05 NC |
1975 | old_input_line_pointer = input_line_pointer; |
1976 | input_line_pointer = str; | |
1977 | ||
1978 | while (*input_line_pointer) | |
1979 | { | |
1980 | SKIP_WHITESPACE (); | |
1981 | switch (*input_line_pointer) | |
1982 | { | |
1983 | case '\0': | |
43cd72b9 | 1984 | case '}': |
e0001a05 NC |
1985 | goto fini; |
1986 | ||
43cd72b9 BW |
1987 | case ':': |
1988 | input_line_pointer++; | |
1989 | if (saw_comma || saw_colon || !saw_arg) | |
1990 | goto err; | |
1991 | saw_colon = TRUE; | |
1992 | break; | |
1993 | ||
e0001a05 NC |
1994 | case ',': |
1995 | input_line_pointer++; | |
43cd72b9 | 1996 | if (saw_comma || saw_colon || !saw_arg) |
e0001a05 NC |
1997 | goto err; |
1998 | saw_comma = TRUE; | |
1999 | break; | |
2000 | ||
2001 | default: | |
43cd72b9 | 2002 | if (!saw_comma && !saw_colon && saw_arg) |
e0001a05 NC |
2003 | goto err; |
2004 | ||
2005 | arg_end = input_line_pointer + 1; | |
2006 | while (!expression_end (arg_end)) | |
2007 | arg_end += 1; | |
43cd72b9 | 2008 | |
e0001a05 | 2009 | arg_len = arg_end - input_line_pointer; |
325801bd | 2010 | arg = XNEWVEC (char, (saw_colon ? 1 : 0) + arg_len + 1); |
e0001a05 NC |
2011 | args[num_args] = arg; |
2012 | ||
43cd72b9 BW |
2013 | if (saw_colon) |
2014 | *arg++ = ':'; | |
e0001a05 NC |
2015 | strncpy (arg, input_line_pointer, arg_len); |
2016 | arg[arg_len] = '\0'; | |
43cd72b9 | 2017 | |
e0001a05 NC |
2018 | input_line_pointer = arg_end; |
2019 | num_args += 1; | |
c138bc38 | 2020 | saw_comma = FALSE; |
43cd72b9 | 2021 | saw_colon = FALSE; |
c138bc38 | 2022 | saw_arg = TRUE; |
e0001a05 NC |
2023 | break; |
2024 | } | |
2025 | } | |
2026 | ||
2027 | fini: | |
43cd72b9 | 2028 | if (saw_comma || saw_colon) |
e0001a05 NC |
2029 | goto err; |
2030 | input_line_pointer = old_input_line_pointer; | |
2031 | return num_args; | |
2032 | ||
2033 | err: | |
43cd72b9 BW |
2034 | if (saw_comma) |
2035 | as_bad (_("extra comma")); | |
2036 | else if (saw_colon) | |
2037 | as_bad (_("extra colon")); | |
2038 | else if (!saw_arg) | |
c138bc38 | 2039 | as_bad (_("missing argument")); |
43cd72b9 BW |
2040 | else |
2041 | as_bad (_("missing comma or colon")); | |
e0001a05 NC |
2042 | input_line_pointer = old_input_line_pointer; |
2043 | return -1; | |
2044 | } | |
2045 | ||
2046 | ||
43cd72b9 | 2047 | /* Parse the arguments to an opcode. Return TRUE on error. */ |
e0001a05 NC |
2048 | |
2049 | static bfd_boolean | |
7fa3d080 | 2050 | parse_arguments (TInsn *insn, int num_args, char **arg_strings) |
e0001a05 | 2051 | { |
43cd72b9 | 2052 | expressionS *tok, *last_tok; |
e0001a05 NC |
2053 | xtensa_opcode opcode = insn->opcode; |
2054 | bfd_boolean had_error = TRUE; | |
43cd72b9 BW |
2055 | xtensa_isa isa = xtensa_default_isa; |
2056 | int n, num_regs = 0; | |
e0001a05 | 2057 | int opcode_operand_count; |
43cd72b9 BW |
2058 | int opnd_cnt, last_opnd_cnt; |
2059 | unsigned int next_reg = 0; | |
e0001a05 NC |
2060 | char *old_input_line_pointer; |
2061 | ||
2062 | if (insn->insn_type == ITYPE_LITERAL) | |
2063 | opcode_operand_count = 1; | |
2064 | else | |
43cd72b9 | 2065 | opcode_operand_count = xtensa_opcode_num_operands (isa, opcode); |
e0001a05 | 2066 | |
43cd72b9 | 2067 | tok = insn->tok; |
e0001a05 NC |
2068 | memset (tok, 0, sizeof (*tok) * MAX_INSN_ARGS); |
2069 | ||
2070 | /* Save and restore input_line_pointer around this function. */ | |
43cd72b9 BW |
2071 | old_input_line_pointer = input_line_pointer; |
2072 | ||
2073 | last_tok = 0; | |
2074 | last_opnd_cnt = -1; | |
2075 | opnd_cnt = 0; | |
2076 | ||
2077 | /* Skip invisible operands. */ | |
2078 | while (xtensa_operand_is_visible (isa, opcode, opnd_cnt) == 0) | |
2079 | { | |
2080 | opnd_cnt += 1; | |
2081 | tok++; | |
2082 | } | |
e0001a05 NC |
2083 | |
2084 | for (n = 0; n < num_args; n++) | |
43cd72b9 | 2085 | { |
e0001a05 | 2086 | input_line_pointer = arg_strings[n]; |
43cd72b9 BW |
2087 | if (*input_line_pointer == ':') |
2088 | { | |
2089 | xtensa_regfile opnd_rf; | |
2090 | input_line_pointer++; | |
2091 | if (num_regs == 0) | |
2092 | goto err; | |
9c2799c2 | 2093 | gas_assert (opnd_cnt > 0); |
43cd72b9 BW |
2094 | num_regs--; |
2095 | opnd_rf = xtensa_operand_regfile (isa, opcode, last_opnd_cnt); | |
2096 | if (next_reg | |
2097 | != tc_get_register (xtensa_regfile_shortname (isa, opnd_rf))) | |
2098 | as_warn (_("incorrect register number, ignoring")); | |
2099 | next_reg++; | |
2100 | } | |
2101 | else | |
2102 | { | |
2103 | if (opnd_cnt >= opcode_operand_count) | |
2104 | { | |
2105 | as_warn (_("too many arguments")); | |
2106 | goto err; | |
2107 | } | |
9c2799c2 | 2108 | gas_assert (opnd_cnt < MAX_INSN_ARGS); |
43cd72b9 BW |
2109 | |
2110 | expression_maybe_register (opcode, opnd_cnt, tok); | |
2111 | next_reg = tok->X_add_number + 1; | |
2112 | ||
2113 | if (tok->X_op == O_illegal || tok->X_op == O_absent) | |
2114 | goto err; | |
2115 | if (xtensa_operand_is_register (isa, opcode, opnd_cnt) == 1) | |
2116 | { | |
2117 | num_regs = xtensa_operand_num_regs (isa, opcode, opnd_cnt) - 1; | |
2118 | /* minus 1 because we are seeing one right now */ | |
2119 | } | |
2120 | else | |
2121 | num_regs = 0; | |
e0001a05 | 2122 | |
43cd72b9 BW |
2123 | last_tok = tok; |
2124 | last_opnd_cnt = opnd_cnt; | |
1ec520b7 | 2125 | demand_empty_rest_of_line (); |
e0001a05 | 2126 | |
43cd72b9 BW |
2127 | do |
2128 | { | |
2129 | opnd_cnt += 1; | |
2130 | tok++; | |
2131 | } | |
2132 | while (xtensa_operand_is_visible (isa, opcode, opnd_cnt) == 0); | |
2133 | } | |
2134 | } | |
e0001a05 | 2135 | |
43cd72b9 BW |
2136 | if (num_regs > 0 && ((int) next_reg != last_tok->X_add_number + 1)) |
2137 | goto err; | |
e0001a05 NC |
2138 | |
2139 | insn->ntok = tok - insn->tok; | |
c138bc38 | 2140 | had_error = FALSE; |
e0001a05 NC |
2141 | |
2142 | err: | |
43cd72b9 | 2143 | input_line_pointer = old_input_line_pointer; |
e0001a05 NC |
2144 | return had_error; |
2145 | } | |
2146 | ||
2147 | ||
43cd72b9 | 2148 | static int |
7fa3d080 | 2149 | get_invisible_operands (TInsn *insn) |
43cd72b9 BW |
2150 | { |
2151 | xtensa_isa isa = xtensa_default_isa; | |
2152 | static xtensa_insnbuf slotbuf = NULL; | |
2153 | xtensa_format fmt; | |
2154 | xtensa_opcode opc = insn->opcode; | |
2155 | int slot, opnd, fmt_found; | |
2156 | unsigned val; | |
2157 | ||
2158 | if (!slotbuf) | |
2159 | slotbuf = xtensa_insnbuf_alloc (isa); | |
2160 | ||
2161 | /* Find format/slot where this can be encoded. */ | |
2162 | fmt_found = 0; | |
2163 | slot = 0; | |
2164 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
2165 | { | |
2166 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
2167 | { | |
2168 | if (xtensa_opcode_encode (isa, fmt, slot, slotbuf, opc) == 0) | |
2169 | { | |
2170 | fmt_found = 1; | |
2171 | break; | |
2172 | } | |
2173 | } | |
2174 | if (fmt_found) break; | |
2175 | } | |
2176 | ||
2177 | if (!fmt_found) | |
2178 | { | |
2179 | as_bad (_("cannot encode opcode \"%s\""), xtensa_opcode_name (isa, opc)); | |
2180 | return -1; | |
2181 | } | |
2182 | ||
2183 | /* First encode all the visible operands | |
2184 | (to deal with shared field operands). */ | |
2185 | for (opnd = 0; opnd < insn->ntok; opnd++) | |
2186 | { | |
2187 | if (xtensa_operand_is_visible (isa, opc, opnd) == 1 | |
2188 | && (insn->tok[opnd].X_op == O_register | |
2189 | || insn->tok[opnd].X_op == O_constant)) | |
2190 | { | |
2191 | val = insn->tok[opnd].X_add_number; | |
2192 | xtensa_operand_encode (isa, opc, opnd, &val); | |
2193 | xtensa_operand_set_field (isa, opc, opnd, fmt, slot, slotbuf, val); | |
2194 | } | |
2195 | } | |
2196 | ||
2197 | /* Then pull out the values for the invisible ones. */ | |
2198 | for (opnd = 0; opnd < insn->ntok; opnd++) | |
2199 | { | |
2200 | if (xtensa_operand_is_visible (isa, opc, opnd) == 0) | |
2201 | { | |
2202 | xtensa_operand_get_field (isa, opc, opnd, fmt, slot, slotbuf, &val); | |
2203 | xtensa_operand_decode (isa, opc, opnd, &val); | |
2204 | insn->tok[opnd].X_add_number = val; | |
2205 | if (xtensa_operand_is_register (isa, opc, opnd) == 1) | |
2206 | insn->tok[opnd].X_op = O_register; | |
2207 | else | |
2208 | insn->tok[opnd].X_op = O_constant; | |
2209 | } | |
2210 | } | |
2211 | ||
2212 | return 0; | |
2213 | } | |
2214 | ||
2215 | ||
e0001a05 | 2216 | static void |
7fa3d080 | 2217 | xg_reverse_shift_count (char **cnt_argp) |
e0001a05 NC |
2218 | { |
2219 | char *cnt_arg, *new_arg; | |
2220 | cnt_arg = *cnt_argp; | |
2221 | ||
2222 | /* replace the argument with "31-(argument)" */ | |
78fb7e37 | 2223 | new_arg = concat ("31-(", cnt_arg, ")", (char *) NULL); |
e0001a05 NC |
2224 | |
2225 | free (cnt_arg); | |
2226 | *cnt_argp = new_arg; | |
2227 | } | |
2228 | ||
2229 | ||
2230 | /* If "arg" is a constant expression, return non-zero with the value | |
2231 | in *valp. */ | |
2232 | ||
2233 | static int | |
7fa3d080 | 2234 | xg_arg_is_constant (char *arg, offsetT *valp) |
e0001a05 NC |
2235 | { |
2236 | expressionS exp; | |
2237 | char *save_ptr = input_line_pointer; | |
2238 | ||
2239 | input_line_pointer = arg; | |
2240 | expression (&exp); | |
2241 | input_line_pointer = save_ptr; | |
2242 | ||
2243 | if (exp.X_op == O_constant) | |
2244 | { | |
2245 | *valp = exp.X_add_number; | |
2246 | return 1; | |
2247 | } | |
2248 | ||
2249 | return 0; | |
2250 | } | |
2251 | ||
2252 | ||
2253 | static void | |
b9bb4a93 | 2254 | xg_replace_opname (char **popname, const char *newop) |
e0001a05 NC |
2255 | { |
2256 | free (*popname); | |
4ec9d7d5 | 2257 | *popname = xstrdup (newop); |
e0001a05 NC |
2258 | } |
2259 | ||
2260 | ||
2261 | static int | |
7fa3d080 BW |
2262 | xg_check_num_args (int *pnum_args, |
2263 | int expected_num, | |
2264 | char *opname, | |
2265 | char **arg_strings) | |
e0001a05 NC |
2266 | { |
2267 | int num_args = *pnum_args; | |
2268 | ||
43cd72b9 | 2269 | if (num_args < expected_num) |
e0001a05 NC |
2270 | { |
2271 | as_bad (_("not enough operands (%d) for '%s'; expected %d"), | |
2272 | num_args, opname, expected_num); | |
2273 | return -1; | |
2274 | } | |
2275 | ||
2276 | if (num_args > expected_num) | |
2277 | { | |
2278 | as_warn (_("too many operands (%d) for '%s'; expected %d"), | |
2279 | num_args, opname, expected_num); | |
2280 | while (num_args-- > expected_num) | |
2281 | { | |
2282 | free (arg_strings[num_args]); | |
2283 | arg_strings[num_args] = 0; | |
2284 | } | |
2285 | *pnum_args = expected_num; | |
2286 | return -1; | |
2287 | } | |
2288 | ||
2289 | return 0; | |
2290 | } | |
2291 | ||
2292 | ||
43cd72b9 BW |
2293 | /* If the register is not specified as part of the opcode, |
2294 | then get it from the operand and move it to the opcode. */ | |
2295 | ||
e0001a05 | 2296 | static int |
7fa3d080 | 2297 | xg_translate_sysreg_op (char **popname, int *pnum_args, char **arg_strings) |
e0001a05 | 2298 | { |
43cd72b9 BW |
2299 | xtensa_isa isa = xtensa_default_isa; |
2300 | xtensa_sysreg sr; | |
e0001a05 | 2301 | char *opname, *new_opname; |
43cd72b9 BW |
2302 | const char *sr_name; |
2303 | int is_user, is_write; | |
e0001a05 NC |
2304 | |
2305 | opname = *popname; | |
2306 | if (*opname == '_') | |
80ca4e2c | 2307 | opname += 1; |
43cd72b9 BW |
2308 | is_user = (opname[1] == 'u'); |
2309 | is_write = (opname[0] == 'w'); | |
e0001a05 | 2310 | |
43cd72b9 | 2311 | /* Opname == [rw]ur or [rwx]sr... */ |
e0001a05 | 2312 | |
43cd72b9 BW |
2313 | if (xg_check_num_args (pnum_args, 2, opname, arg_strings)) |
2314 | return -1; | |
e0001a05 | 2315 | |
43cd72b9 BW |
2316 | /* Check if the argument is a symbolic register name. */ |
2317 | sr = xtensa_sysreg_lookup_name (isa, arg_strings[1]); | |
2318 | /* Handle WSR to "INTSET" as a special case. */ | |
2319 | if (sr == XTENSA_UNDEFINED && is_write && !is_user | |
2320 | && !strcasecmp (arg_strings[1], "intset")) | |
2321 | sr = xtensa_sysreg_lookup_name (isa, "interrupt"); | |
2322 | if (sr == XTENSA_UNDEFINED | |
2323 | || (xtensa_sysreg_is_user (isa, sr) == 1) != is_user) | |
2324 | { | |
2325 | /* Maybe it's a register number.... */ | |
2326 | offsetT val; | |
e0001a05 NC |
2327 | if (!xg_arg_is_constant (arg_strings[1], &val)) |
2328 | { | |
43cd72b9 BW |
2329 | as_bad (_("invalid register '%s' for '%s' instruction"), |
2330 | arg_strings[1], opname); | |
e0001a05 NC |
2331 | return -1; |
2332 | } | |
43cd72b9 BW |
2333 | sr = xtensa_sysreg_lookup (isa, val, is_user); |
2334 | if (sr == XTENSA_UNDEFINED) | |
e0001a05 | 2335 | { |
43cd72b9 | 2336 | as_bad (_("invalid register number (%ld) for '%s' instruction"), |
dd49a749 | 2337 | (long) val, opname); |
e0001a05 NC |
2338 | return -1; |
2339 | } | |
43cd72b9 | 2340 | } |
e0001a05 | 2341 | |
43cd72b9 BW |
2342 | /* Remove the last argument, which is now part of the opcode. */ |
2343 | free (arg_strings[1]); | |
2344 | arg_strings[1] = 0; | |
2345 | *pnum_args = 1; | |
2346 | ||
2347 | /* Translate the opcode. */ | |
2348 | sr_name = xtensa_sysreg_name (isa, sr); | |
2349 | /* Another special case for "WSR.INTSET".... */ | |
2350 | if (is_write && !is_user && !strcasecmp ("interrupt", sr_name)) | |
2351 | sr_name = "intset"; | |
4ec9d7d5 | 2352 | new_opname = concat (*popname, ".", sr_name, (char *) NULL); |
43cd72b9 BW |
2353 | free (*popname); |
2354 | *popname = new_opname; | |
2355 | ||
2356 | return 0; | |
2357 | } | |
2358 | ||
2359 | ||
2360 | static int | |
7fa3d080 | 2361 | xtensa_translate_old_userreg_ops (char **popname) |
43cd72b9 BW |
2362 | { |
2363 | xtensa_isa isa = xtensa_default_isa; | |
2364 | xtensa_sysreg sr; | |
2365 | char *opname, *new_opname; | |
2366 | const char *sr_name; | |
2367 | bfd_boolean has_underbar = FALSE; | |
2368 | ||
2369 | opname = *popname; | |
2370 | if (opname[0] == '_') | |
2371 | { | |
2372 | has_underbar = TRUE; | |
2373 | opname += 1; | |
2374 | } | |
2375 | ||
2376 | sr = xtensa_sysreg_lookup_name (isa, opname + 1); | |
2377 | if (sr != XTENSA_UNDEFINED) | |
2378 | { | |
2379 | /* The new default name ("nnn") is different from the old default | |
2380 | name ("URnnn"). The old default is handled below, and we don't | |
2381 | want to recognize [RW]nnn, so do nothing if the name is the (new) | |
2382 | default. */ | |
2383 | static char namebuf[10]; | |
2384 | sprintf (namebuf, "%d", xtensa_sysreg_number (isa, sr)); | |
2385 | if (strcmp (namebuf, opname + 1) == 0) | |
2386 | return 0; | |
2387 | } | |
2388 | else | |
2389 | { | |
2390 | offsetT val; | |
2391 | char *end; | |
2392 | ||
2393 | /* Only continue if the reg name is "URnnn". */ | |
2394 | if (opname[1] != 'u' || opname[2] != 'r') | |
2395 | return 0; | |
2396 | val = strtoul (opname + 3, &end, 10); | |
2397 | if (*end != '\0') | |
2398 | return 0; | |
2399 | ||
2400 | sr = xtensa_sysreg_lookup (isa, val, 1); | |
2401 | if (sr == XTENSA_UNDEFINED) | |
2402 | { | |
2403 | as_bad (_("invalid register number (%ld) for '%s'"), | |
dd49a749 | 2404 | (long) val, opname); |
43cd72b9 BW |
2405 | return -1; |
2406 | } | |
2407 | } | |
2408 | ||
2409 | /* Translate the opcode. */ | |
2410 | sr_name = xtensa_sysreg_name (isa, sr); | |
add39d23 | 2411 | new_opname = XNEWVEC (char, strlen (sr_name) + 6); |
43cd72b9 BW |
2412 | sprintf (new_opname, "%s%cur.%s", (has_underbar ? "_" : ""), |
2413 | opname[0], sr_name); | |
2414 | free (*popname); | |
2415 | *popname = new_opname; | |
2416 | ||
2417 | return 0; | |
2418 | } | |
2419 | ||
2420 | ||
2421 | static int | |
b9bb4a93 TS |
2422 | xtensa_translate_zero_immed (const char *old_op, |
2423 | const char *new_op, | |
7fa3d080 BW |
2424 | char **popname, |
2425 | int *pnum_args, | |
2426 | char **arg_strings) | |
43cd72b9 BW |
2427 | { |
2428 | char *opname; | |
2429 | offsetT val; | |
2430 | ||
2431 | opname = *popname; | |
9c2799c2 | 2432 | gas_assert (opname[0] != '_'); |
43cd72b9 BW |
2433 | |
2434 | if (strcmp (opname, old_op) != 0) | |
2435 | return 0; | |
e0001a05 | 2436 | |
43cd72b9 BW |
2437 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) |
2438 | return -1; | |
2439 | if (xg_arg_is_constant (arg_strings[1], &val) && val == 0) | |
2440 | { | |
2441 | xg_replace_opname (popname, new_op); | |
2442 | free (arg_strings[1]); | |
2443 | arg_strings[1] = arg_strings[2]; | |
2444 | arg_strings[2] = 0; | |
2445 | *pnum_args = 2; | |
e0001a05 NC |
2446 | } |
2447 | ||
2448 | return 0; | |
2449 | } | |
2450 | ||
2451 | ||
2452 | /* If the instruction is an idiom (i.e., a built-in macro), translate it. | |
2453 | Returns non-zero if an error was found. */ | |
2454 | ||
2455 | static int | |
7fa3d080 | 2456 | xg_translate_idioms (char **popname, int *pnum_args, char **arg_strings) |
e0001a05 NC |
2457 | { |
2458 | char *opname = *popname; | |
2459 | bfd_boolean has_underbar = FALSE; | |
2460 | ||
2461 | if (*opname == '_') | |
2462 | { | |
2463 | has_underbar = TRUE; | |
2464 | opname += 1; | |
2465 | } | |
2466 | ||
2467 | if (strcmp (opname, "mov") == 0) | |
2468 | { | |
43cd72b9 | 2469 | if (use_transform () && !has_underbar && density_supported) |
e0001a05 NC |
2470 | xg_replace_opname (popname, "mov.n"); |
2471 | else | |
2472 | { | |
2473 | if (xg_check_num_args (pnum_args, 2, opname, arg_strings)) | |
2474 | return -1; | |
2475 | xg_replace_opname (popname, (has_underbar ? "_or" : "or")); | |
4ec9d7d5 | 2476 | arg_strings[2] = xstrdup (arg_strings[1]); |
e0001a05 NC |
2477 | *pnum_args = 3; |
2478 | } | |
2479 | return 0; | |
2480 | } | |
2481 | ||
2482 | if (strcmp (opname, "bbsi.l") == 0) | |
2483 | { | |
2484 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) | |
2485 | return -1; | |
2486 | xg_replace_opname (popname, (has_underbar ? "_bbsi" : "bbsi")); | |
2487 | if (target_big_endian) | |
2488 | xg_reverse_shift_count (&arg_strings[1]); | |
2489 | return 0; | |
2490 | } | |
2491 | ||
2492 | if (strcmp (opname, "bbci.l") == 0) | |
2493 | { | |
2494 | if (xg_check_num_args (pnum_args, 3, opname, arg_strings)) | |
2495 | return -1; | |
2496 | xg_replace_opname (popname, (has_underbar ? "_bbci" : "bbci")); | |
2497 | if (target_big_endian) | |
2498 | xg_reverse_shift_count (&arg_strings[1]); | |
2499 | return 0; | |
2500 | } | |
2501 | ||
eb6d9dce | 2502 | /* Don't do anything special with NOPs inside FLIX instructions. They |
3739860c | 2503 | are handled elsewhere. Real NOP instructions are always available |
eb6d9dce BW |
2504 | in configurations with FLIX, so this should never be an issue but |
2505 | check for it anyway. */ | |
2506 | if (!cur_vinsn.inside_bundle && xtensa_nop_opcode == XTENSA_UNDEFINED | |
43cd72b9 | 2507 | && strcmp (opname, "nop") == 0) |
e0001a05 | 2508 | { |
43cd72b9 | 2509 | if (use_transform () && !has_underbar && density_supported) |
e0001a05 NC |
2510 | xg_replace_opname (popname, "nop.n"); |
2511 | else | |
2512 | { | |
2513 | if (xg_check_num_args (pnum_args, 0, opname, arg_strings)) | |
2514 | return -1; | |
2515 | xg_replace_opname (popname, (has_underbar ? "_or" : "or")); | |
4ec9d7d5 TS |
2516 | arg_strings[0] = xstrdup ("a1"); |
2517 | arg_strings[1] = xstrdup ("a1"); | |
2518 | arg_strings[2] = xstrdup ("a1"); | |
e0001a05 NC |
2519 | *pnum_args = 3; |
2520 | } | |
2521 | return 0; | |
2522 | } | |
2523 | ||
43cd72b9 BW |
2524 | /* Recognize [RW]UR and [RWX]SR. */ |
2525 | if ((((opname[0] == 'r' || opname[0] == 'w') | |
2526 | && (opname[1] == 'u' || opname[1] == 's')) | |
2527 | || (opname[0] == 'x' && opname[1] == 's')) | |
2528 | && opname[2] == 'r' | |
2529 | && opname[3] == '\0') | |
e0001a05 NC |
2530 | return xg_translate_sysreg_op (popname, pnum_args, arg_strings); |
2531 | ||
43cd72b9 BW |
2532 | /* Backward compatibility for RUR and WUR: Recognize [RW]UR<nnn> and |
2533 | [RW]<name> if <name> is the non-default name of a user register. */ | |
2534 | if ((opname[0] == 'r' || opname[0] == 'w') | |
2535 | && xtensa_opcode_lookup (xtensa_default_isa, opname) == XTENSA_UNDEFINED) | |
2536 | return xtensa_translate_old_userreg_ops (popname); | |
e0001a05 | 2537 | |
43cd72b9 BW |
2538 | /* Relax branches that don't allow comparisons against an immediate value |
2539 | of zero to the corresponding branches with implicit zero immediates. */ | |
2540 | if (!has_underbar && use_transform ()) | |
2541 | { | |
2542 | if (xtensa_translate_zero_immed ("bnei", "bnez", popname, | |
2543 | pnum_args, arg_strings)) | |
2544 | return -1; | |
e0001a05 | 2545 | |
43cd72b9 BW |
2546 | if (xtensa_translate_zero_immed ("beqi", "beqz", popname, |
2547 | pnum_args, arg_strings)) | |
2548 | return -1; | |
e0001a05 | 2549 | |
43cd72b9 BW |
2550 | if (xtensa_translate_zero_immed ("bgei", "bgez", popname, |
2551 | pnum_args, arg_strings)) | |
2552 | return -1; | |
e0001a05 | 2553 | |
43cd72b9 BW |
2554 | if (xtensa_translate_zero_immed ("blti", "bltz", popname, |
2555 | pnum_args, arg_strings)) | |
2556 | return -1; | |
2557 | } | |
e0001a05 | 2558 | |
43cd72b9 BW |
2559 | return 0; |
2560 | } | |
e0001a05 | 2561 | |
43cd72b9 BW |
2562 | \f |
2563 | /* Functions for dealing with the Xtensa ISA. */ | |
e0001a05 | 2564 | |
43cd72b9 BW |
2565 | /* Currently the assembler only allows us to use a single target per |
2566 | fragment. Because of this, only one operand for a given | |
2567 | instruction may be symbolic. If there is a PC-relative operand, | |
2568 | the last one is chosen. Otherwise, the result is the number of the | |
2569 | last immediate operand, and if there are none of those, we fail and | |
2570 | return -1. */ | |
e0001a05 | 2571 | |
7fa3d080 BW |
2572 | static int |
2573 | get_relaxable_immed (xtensa_opcode opcode) | |
43cd72b9 BW |
2574 | { |
2575 | int last_immed = -1; | |
2576 | int noperands, opi; | |
e0001a05 | 2577 | |
43cd72b9 BW |
2578 | if (opcode == XTENSA_UNDEFINED) |
2579 | return -1; | |
e0001a05 | 2580 | |
43cd72b9 BW |
2581 | noperands = xtensa_opcode_num_operands (xtensa_default_isa, opcode); |
2582 | for (opi = noperands - 1; opi >= 0; opi--) | |
2583 | { | |
2584 | if (xtensa_operand_is_visible (xtensa_default_isa, opcode, opi) == 0) | |
2585 | continue; | |
2586 | if (xtensa_operand_is_PCrelative (xtensa_default_isa, opcode, opi) == 1) | |
2587 | return opi; | |
2588 | if (last_immed == -1 | |
2589 | && xtensa_operand_is_register (xtensa_default_isa, opcode, opi) == 0) | |
2590 | last_immed = opi; | |
e0001a05 | 2591 | } |
43cd72b9 | 2592 | return last_immed; |
e0001a05 NC |
2593 | } |
2594 | ||
e0001a05 | 2595 | |
43cd72b9 | 2596 | static xtensa_opcode |
7fa3d080 | 2597 | get_opcode_from_buf (const char *buf, int slot) |
e0001a05 | 2598 | { |
43cd72b9 BW |
2599 | static xtensa_insnbuf insnbuf = NULL; |
2600 | static xtensa_insnbuf slotbuf = NULL; | |
2601 | xtensa_isa isa = xtensa_default_isa; | |
2602 | xtensa_format fmt; | |
2603 | ||
2604 | if (!insnbuf) | |
e0001a05 | 2605 | { |
43cd72b9 BW |
2606 | insnbuf = xtensa_insnbuf_alloc (isa); |
2607 | slotbuf = xtensa_insnbuf_alloc (isa); | |
e0001a05 | 2608 | } |
e0001a05 | 2609 | |
d77b99c9 | 2610 | xtensa_insnbuf_from_chars (isa, insnbuf, (const unsigned char *) buf, 0); |
43cd72b9 BW |
2611 | fmt = xtensa_format_decode (isa, insnbuf); |
2612 | if (fmt == XTENSA_UNDEFINED) | |
2613 | return XTENSA_UNDEFINED; | |
e0001a05 | 2614 | |
43cd72b9 BW |
2615 | if (slot >= xtensa_format_num_slots (isa, fmt)) |
2616 | return XTENSA_UNDEFINED; | |
e0001a05 | 2617 | |
43cd72b9 BW |
2618 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); |
2619 | return xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
e0001a05 NC |
2620 | } |
2621 | ||
2622 | ||
43cd72b9 | 2623 | #ifdef TENSILICA_DEBUG |
e0001a05 | 2624 | |
43cd72b9 | 2625 | /* For debugging, print out the mapping of opcode numbers to opcodes. */ |
e0001a05 | 2626 | |
7fa3d080 BW |
2627 | static void |
2628 | xtensa_print_insn_table (void) | |
43cd72b9 BW |
2629 | { |
2630 | int num_opcodes, num_operands; | |
2631 | xtensa_opcode opcode; | |
2632 | xtensa_isa isa = xtensa_default_isa; | |
e0001a05 | 2633 | |
43cd72b9 BW |
2634 | num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa); |
2635 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
e0001a05 | 2636 | { |
43cd72b9 BW |
2637 | int opn; |
2638 | fprintf (stderr, "%d: %s: ", opcode, xtensa_opcode_name (isa, opcode)); | |
2639 | num_operands = xtensa_opcode_num_operands (isa, opcode); | |
2640 | for (opn = 0; opn < num_operands; opn++) | |
2641 | { | |
2642 | if (xtensa_operand_is_visible (isa, opcode, opn) == 0) | |
2643 | continue; | |
2644 | if (xtensa_operand_is_register (isa, opcode, opn) == 1) | |
2645 | { | |
2646 | xtensa_regfile opnd_rf = | |
2647 | xtensa_operand_regfile (isa, opcode, opn); | |
2648 | fprintf (stderr, "%s ", xtensa_regfile_shortname (isa, opnd_rf)); | |
2649 | } | |
2650 | else if (xtensa_operand_is_PCrelative (isa, opcode, opn) == 1) | |
2651 | fputs ("[lLr] ", stderr); | |
2652 | else | |
2653 | fputs ("i ", stderr); | |
2654 | } | |
2655 | fprintf (stderr, "\n"); | |
e0001a05 | 2656 | } |
e0001a05 NC |
2657 | } |
2658 | ||
2659 | ||
43cd72b9 | 2660 | static void |
7fa3d080 | 2661 | print_vliw_insn (xtensa_insnbuf vbuf) |
e0001a05 | 2662 | { |
e0001a05 | 2663 | xtensa_isa isa = xtensa_default_isa; |
43cd72b9 BW |
2664 | xtensa_format f = xtensa_format_decode (isa, vbuf); |
2665 | xtensa_insnbuf sbuf = xtensa_insnbuf_alloc (isa); | |
2666 | int op; | |
e0001a05 | 2667 | |
43cd72b9 | 2668 | fprintf (stderr, "format = %d\n", f); |
e0001a05 | 2669 | |
43cd72b9 BW |
2670 | for (op = 0; op < xtensa_format_num_slots (isa, f); op++) |
2671 | { | |
2672 | xtensa_opcode opcode; | |
2673 | const char *opname; | |
2674 | int operands; | |
2675 | ||
2676 | xtensa_format_get_slot (isa, f, op, vbuf, sbuf); | |
2677 | opcode = xtensa_opcode_decode (isa, f, op, sbuf); | |
2678 | opname = xtensa_opcode_name (isa, opcode); | |
2679 | ||
2680 | fprintf (stderr, "op in slot %i is %s;\n", op, opname); | |
2681 | fprintf (stderr, " operands = "); | |
2682 | for (operands = 0; | |
2683 | operands < xtensa_opcode_num_operands (isa, opcode); | |
2684 | operands++) | |
2685 | { | |
2686 | unsigned int val; | |
2687 | if (xtensa_operand_is_visible (isa, opcode, operands) == 0) | |
2688 | continue; | |
2689 | xtensa_operand_get_field (isa, opcode, operands, f, op, sbuf, &val); | |
2690 | xtensa_operand_decode (isa, opcode, operands, &val); | |
2691 | fprintf (stderr, "%d ", val); | |
2692 | } | |
2693 | fprintf (stderr, "\n"); | |
2694 | } | |
2695 | xtensa_insnbuf_free (isa, sbuf); | |
e0001a05 NC |
2696 | } |
2697 | ||
43cd72b9 BW |
2698 | #endif /* TENSILICA_DEBUG */ |
2699 | ||
e0001a05 NC |
2700 | |
2701 | static bfd_boolean | |
7fa3d080 | 2702 | is_direct_call_opcode (xtensa_opcode opcode) |
e0001a05 | 2703 | { |
43cd72b9 BW |
2704 | xtensa_isa isa = xtensa_default_isa; |
2705 | int n, num_operands; | |
e0001a05 | 2706 | |
64b607e6 | 2707 | if (xtensa_opcode_is_call (isa, opcode) != 1) |
e0001a05 NC |
2708 | return FALSE; |
2709 | ||
43cd72b9 BW |
2710 | num_operands = xtensa_opcode_num_operands (isa, opcode); |
2711 | for (n = 0; n < num_operands; n++) | |
2712 | { | |
2713 | if (xtensa_operand_is_register (isa, opcode, n) == 0 | |
2714 | && xtensa_operand_is_PCrelative (isa, opcode, n) == 1) | |
2715 | return TRUE; | |
2716 | } | |
2717 | return FALSE; | |
e0001a05 NC |
2718 | } |
2719 | ||
2720 | ||
43cd72b9 BW |
2721 | /* Convert from BFD relocation type code to slot and operand number. |
2722 | Returns non-zero on failure. */ | |
e0001a05 | 2723 | |
43cd72b9 | 2724 | static int |
7fa3d080 | 2725 | decode_reloc (bfd_reloc_code_real_type reloc, int *slot, bfd_boolean *is_alt) |
e0001a05 | 2726 | { |
43cd72b9 BW |
2727 | if (reloc >= BFD_RELOC_XTENSA_SLOT0_OP |
2728 | && reloc <= BFD_RELOC_XTENSA_SLOT14_OP) | |
e0001a05 | 2729 | { |
43cd72b9 BW |
2730 | *slot = reloc - BFD_RELOC_XTENSA_SLOT0_OP; |
2731 | *is_alt = FALSE; | |
e0001a05 | 2732 | } |
43cd72b9 BW |
2733 | else if (reloc >= BFD_RELOC_XTENSA_SLOT0_ALT |
2734 | && reloc <= BFD_RELOC_XTENSA_SLOT14_ALT) | |
e0001a05 | 2735 | { |
43cd72b9 BW |
2736 | *slot = reloc - BFD_RELOC_XTENSA_SLOT0_ALT; |
2737 | *is_alt = TRUE; | |
e0001a05 | 2738 | } |
43cd72b9 BW |
2739 | else |
2740 | return -1; | |
2741 | ||
2742 | return 0; | |
e0001a05 NC |
2743 | } |
2744 | ||
2745 | ||
43cd72b9 BW |
2746 | /* Convert from slot number to BFD relocation type code for the |
2747 | standard PC-relative relocations. Return BFD_RELOC_NONE on | |
2748 | failure. */ | |
e0001a05 | 2749 | |
43cd72b9 | 2750 | static bfd_reloc_code_real_type |
7fa3d080 | 2751 | encode_reloc (int slot) |
e0001a05 | 2752 | { |
43cd72b9 BW |
2753 | if (slot < 0 || slot > 14) |
2754 | return BFD_RELOC_NONE; | |
2755 | ||
2756 | return BFD_RELOC_XTENSA_SLOT0_OP + slot; | |
e0001a05 NC |
2757 | } |
2758 | ||
2759 | ||
43cd72b9 BW |
2760 | /* Convert from slot numbers to BFD relocation type code for the |
2761 | "alternate" relocations. Return BFD_RELOC_NONE on failure. */ | |
e0001a05 | 2762 | |
43cd72b9 | 2763 | static bfd_reloc_code_real_type |
7fa3d080 | 2764 | encode_alt_reloc (int slot) |
e0001a05 | 2765 | { |
43cd72b9 BW |
2766 | if (slot < 0 || slot > 14) |
2767 | return BFD_RELOC_NONE; | |
2768 | ||
2769 | return BFD_RELOC_XTENSA_SLOT0_ALT + slot; | |
e0001a05 NC |
2770 | } |
2771 | ||
2772 | ||
2773 | static void | |
7fa3d080 BW |
2774 | xtensa_insnbuf_set_operand (xtensa_insnbuf slotbuf, |
2775 | xtensa_format fmt, | |
2776 | int slot, | |
2777 | xtensa_opcode opcode, | |
2778 | int operand, | |
2779 | uint32 value, | |
2780 | const char *file, | |
2781 | unsigned int line) | |
e0001a05 | 2782 | { |
e0001a05 NC |
2783 | uint32 valbuf = value; |
2784 | ||
43cd72b9 | 2785 | if (xtensa_operand_encode (xtensa_default_isa, opcode, operand, &valbuf)) |
e0001a05 | 2786 | { |
43cd72b9 BW |
2787 | if (xtensa_operand_is_PCrelative (xtensa_default_isa, opcode, operand) |
2788 | == 1) | |
2789 | as_bad_where ((char *) file, line, | |
3739860c | 2790 | _("operand %d of '%s' has out of range value '%u'"), |
d7c531cd BW |
2791 | operand + 1, |
2792 | xtensa_opcode_name (xtensa_default_isa, opcode), | |
2793 | value); | |
43cd72b9 BW |
2794 | else |
2795 | as_bad_where ((char *) file, line, | |
d7c531cd BW |
2796 | _("operand %d of '%s' has invalid value '%u'"), |
2797 | operand + 1, | |
2798 | xtensa_opcode_name (xtensa_default_isa, opcode), | |
2799 | value); | |
43cd72b9 | 2800 | return; |
e0001a05 NC |
2801 | } |
2802 | ||
43cd72b9 BW |
2803 | xtensa_operand_set_field (xtensa_default_isa, opcode, operand, fmt, slot, |
2804 | slotbuf, valbuf); | |
e0001a05 NC |
2805 | } |
2806 | ||
2807 | ||
2808 | static uint32 | |
7fa3d080 BW |
2809 | xtensa_insnbuf_get_operand (xtensa_insnbuf slotbuf, |
2810 | xtensa_format fmt, | |
2811 | int slot, | |
2812 | xtensa_opcode opcode, | |
2813 | int opnum) | |
e0001a05 | 2814 | { |
43cd72b9 BW |
2815 | uint32 val = 0; |
2816 | (void) xtensa_operand_get_field (xtensa_default_isa, opcode, opnum, | |
2817 | fmt, slot, slotbuf, &val); | |
2818 | (void) xtensa_operand_decode (xtensa_default_isa, opcode, opnum, &val); | |
2819 | return val; | |
e0001a05 NC |
2820 | } |
2821 | ||
e0001a05 | 2822 | \f |
7fa3d080 | 2823 | /* Checks for rules from xtensa-relax tables. */ |
e0001a05 | 2824 | |
7fa3d080 BW |
2825 | /* The routine xg_instruction_matches_option_term must return TRUE |
2826 | when a given option term is true. The meaning of all of the option | |
19e8f41a | 2827 | terms is given interpretation by this function. */ |
e0001a05 | 2828 | |
7fa3d080 | 2829 | static bfd_boolean |
19e8f41a | 2830 | xg_instruction_matches_option_term (TInsn *insn, const ReqOrOption *option) |
e0001a05 | 2831 | { |
7fa3d080 BW |
2832 | if (strcmp (option->option_name, "realnop") == 0 |
2833 | || strncmp (option->option_name, "IsaUse", 6) == 0) | |
2834 | { | |
2835 | /* These conditions were evaluated statically when building the | |
2836 | relaxation table. There's no need to reevaluate them now. */ | |
2837 | return TRUE; | |
2838 | } | |
19e8f41a BW |
2839 | else if (strcmp (option->option_name, "FREEREG") == 0) |
2840 | return insn->extra_arg.X_op == O_register; | |
7fa3d080 BW |
2841 | else |
2842 | { | |
2843 | as_fatal (_("internal error: unknown option name '%s'"), | |
2844 | option->option_name); | |
2845 | } | |
e0001a05 NC |
2846 | } |
2847 | ||
2848 | ||
7fa3d080 BW |
2849 | static bfd_boolean |
2850 | xg_instruction_matches_or_options (TInsn *insn, | |
2851 | const ReqOrOptionList *or_option) | |
e0001a05 | 2852 | { |
7fa3d080 BW |
2853 | const ReqOrOption *option; |
2854 | /* Must match each of the AND terms. */ | |
2855 | for (option = or_option; option != NULL; option = option->next) | |
e0001a05 | 2856 | { |
7fa3d080 BW |
2857 | if (xg_instruction_matches_option_term (insn, option)) |
2858 | return TRUE; | |
e0001a05 | 2859 | } |
7fa3d080 | 2860 | return FALSE; |
e0001a05 NC |
2861 | } |
2862 | ||
2863 | ||
7fa3d080 BW |
2864 | static bfd_boolean |
2865 | xg_instruction_matches_options (TInsn *insn, const ReqOptionList *options) | |
e0001a05 | 2866 | { |
7fa3d080 BW |
2867 | const ReqOption *req_options; |
2868 | /* Must match each of the AND terms. */ | |
2869 | for (req_options = options; | |
2870 | req_options != NULL; | |
2871 | req_options = req_options->next) | |
e0001a05 | 2872 | { |
7fa3d080 BW |
2873 | /* Must match one of the OR clauses. */ |
2874 | if (!xg_instruction_matches_or_options (insn, | |
2875 | req_options->or_option_terms)) | |
2876 | return FALSE; | |
e0001a05 | 2877 | } |
7fa3d080 | 2878 | return TRUE; |
e0001a05 NC |
2879 | } |
2880 | ||
2881 | ||
7fa3d080 | 2882 | /* Return the transition rule that matches or NULL if none matches. */ |
e0001a05 | 2883 | |
7fa3d080 BW |
2884 | static bfd_boolean |
2885 | xg_instruction_matches_rule (TInsn *insn, TransitionRule *rule) | |
e0001a05 | 2886 | { |
7fa3d080 | 2887 | PreconditionList *condition_l; |
e0001a05 | 2888 | |
7fa3d080 BW |
2889 | if (rule->opcode != insn->opcode) |
2890 | return FALSE; | |
e0001a05 | 2891 | |
7fa3d080 BW |
2892 | for (condition_l = rule->conditions; |
2893 | condition_l != NULL; | |
2894 | condition_l = condition_l->next) | |
e0001a05 | 2895 | { |
7fa3d080 BW |
2896 | expressionS *exp1; |
2897 | expressionS *exp2; | |
2898 | Precondition *cond = condition_l->precond; | |
e0001a05 | 2899 | |
7fa3d080 | 2900 | switch (cond->typ) |
e0001a05 | 2901 | { |
7fa3d080 BW |
2902 | case OP_CONSTANT: |
2903 | /* The expression must be the constant. */ | |
9c2799c2 | 2904 | gas_assert (cond->op_num < insn->ntok); |
7fa3d080 BW |
2905 | exp1 = &insn->tok[cond->op_num]; |
2906 | if (expr_is_const (exp1)) | |
2907 | { | |
2908 | switch (cond->cmp) | |
2909 | { | |
2910 | case OP_EQUAL: | |
2911 | if (get_expr_const (exp1) != cond->op_data) | |
2912 | return FALSE; | |
2913 | break; | |
2914 | case OP_NOTEQUAL: | |
2915 | if (get_expr_const (exp1) == cond->op_data) | |
2916 | return FALSE; | |
2917 | break; | |
2918 | default: | |
2919 | return FALSE; | |
2920 | } | |
2921 | } | |
2922 | else if (expr_is_register (exp1)) | |
2923 | { | |
2924 | switch (cond->cmp) | |
2925 | { | |
2926 | case OP_EQUAL: | |
2927 | if (get_expr_register (exp1) != cond->op_data) | |
2928 | return FALSE; | |
2929 | break; | |
2930 | case OP_NOTEQUAL: | |
2931 | if (get_expr_register (exp1) == cond->op_data) | |
2932 | return FALSE; | |
2933 | break; | |
2934 | default: | |
2935 | return FALSE; | |
2936 | } | |
2937 | } | |
2938 | else | |
2939 | return FALSE; | |
2940 | break; | |
2941 | ||
2942 | case OP_OPERAND: | |
9c2799c2 NC |
2943 | gas_assert (cond->op_num < insn->ntok); |
2944 | gas_assert (cond->op_data < insn->ntok); | |
7fa3d080 BW |
2945 | exp1 = &insn->tok[cond->op_num]; |
2946 | exp2 = &insn->tok[cond->op_data]; | |
2947 | ||
2948 | switch (cond->cmp) | |
2949 | { | |
2950 | case OP_EQUAL: | |
2951 | if (!expr_is_equal (exp1, exp2)) | |
2952 | return FALSE; | |
2953 | break; | |
2954 | case OP_NOTEQUAL: | |
2955 | if (expr_is_equal (exp1, exp2)) | |
2956 | return FALSE; | |
2957 | break; | |
2958 | } | |
2959 | break; | |
2960 | ||
2961 | case OP_LITERAL: | |
2962 | case OP_LABEL: | |
2963 | default: | |
2964 | return FALSE; | |
2965 | } | |
2966 | } | |
2967 | if (!xg_instruction_matches_options (insn, rule->options)) | |
2968 | return FALSE; | |
2969 | ||
2970 | return TRUE; | |
2971 | } | |
2972 | ||
2973 | ||
2974 | static int | |
2975 | transition_rule_cmp (const TransitionRule *a, const TransitionRule *b) | |
2976 | { | |
2977 | bfd_boolean a_greater = FALSE; | |
2978 | bfd_boolean b_greater = FALSE; | |
2979 | ||
2980 | ReqOptionList *l_a = a->options; | |
2981 | ReqOptionList *l_b = b->options; | |
2982 | ||
2983 | /* We only care if they both are the same except for | |
2984 | a const16 vs. an l32r. */ | |
2985 | ||
2986 | while (l_a && l_b && ((l_a->next == NULL) == (l_b->next == NULL))) | |
2987 | { | |
2988 | ReqOrOptionList *l_or_a = l_a->or_option_terms; | |
2989 | ReqOrOptionList *l_or_b = l_b->or_option_terms; | |
2990 | while (l_or_a && l_or_b && ((l_a->next == NULL) == (l_b->next == NULL))) | |
2991 | { | |
2992 | if (l_or_a->is_true != l_or_b->is_true) | |
2993 | return 0; | |
2994 | if (strcmp (l_or_a->option_name, l_or_b->option_name) != 0) | |
2995 | { | |
2996 | /* This is the case we care about. */ | |
2997 | if (strcmp (l_or_a->option_name, "IsaUseConst16") == 0 | |
2998 | && strcmp (l_or_b->option_name, "IsaUseL32R") == 0) | |
2999 | { | |
3000 | if (prefer_const16) | |
3001 | a_greater = TRUE; | |
3002 | else | |
3003 | b_greater = TRUE; | |
3004 | } | |
3005 | else if (strcmp (l_or_a->option_name, "IsaUseL32R") == 0 | |
3006 | && strcmp (l_or_b->option_name, "IsaUseConst16") == 0) | |
3007 | { | |
3008 | if (prefer_const16) | |
3009 | b_greater = TRUE; | |
3010 | else | |
3011 | a_greater = TRUE; | |
3012 | } | |
3013 | else | |
3014 | return 0; | |
3015 | } | |
3016 | l_or_a = l_or_a->next; | |
3017 | l_or_b = l_or_b->next; | |
3018 | } | |
3019 | if (l_or_a || l_or_b) | |
3020 | return 0; | |
3021 | ||
3022 | l_a = l_a->next; | |
3023 | l_b = l_b->next; | |
3024 | } | |
3025 | if (l_a || l_b) | |
3026 | return 0; | |
3027 | ||
3028 | /* Incomparable if the substitution was used differently in two cases. */ | |
3029 | if (a_greater && b_greater) | |
3030 | return 0; | |
3031 | ||
3032 | if (b_greater) | |
3033 | return 1; | |
3034 | if (a_greater) | |
3035 | return -1; | |
3036 | ||
3037 | return 0; | |
3038 | } | |
3039 | ||
3040 | ||
3041 | static TransitionRule * | |
3042 | xg_instruction_match (TInsn *insn) | |
3043 | { | |
3044 | TransitionTable *table = xg_build_simplify_table (&transition_rule_cmp); | |
3045 | TransitionList *l; | |
9c2799c2 | 3046 | gas_assert (insn->opcode < table->num_opcodes); |
7fa3d080 BW |
3047 | |
3048 | /* Walk through all of the possible transitions. */ | |
3049 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3050 | { | |
3051 | TransitionRule *rule = l->rule; | |
3052 | if (xg_instruction_matches_rule (insn, rule)) | |
3053 | return rule; | |
3054 | } | |
3055 | return NULL; | |
3056 | } | |
3057 | ||
3058 | \f | |
3059 | /* Various Other Internal Functions. */ | |
3060 | ||
3061 | static bfd_boolean | |
3062 | is_unique_insn_expansion (TransitionRule *r) | |
3063 | { | |
3064 | if (!r->to_instr || r->to_instr->next != NULL) | |
3065 | return FALSE; | |
3066 | if (r->to_instr->typ != INSTR_INSTR) | |
3067 | return FALSE; | |
3068 | return TRUE; | |
3069 | } | |
3070 | ||
3071 | ||
84b08ed9 BW |
3072 | /* Check if there is exactly one relaxation for INSN that converts it to |
3073 | another instruction of equal or larger size. If so, and if TARG is | |
3074 | non-null, go ahead and generate the relaxed instruction into TARG. If | |
3075 | NARROW_ONLY is true, then only consider relaxations that widen a narrow | |
3076 | instruction, i.e., ignore relaxations that convert to an instruction of | |
3077 | equal size. In some contexts where this function is used, only | |
c138bc38 | 3078 | a single widening is allowed and the NARROW_ONLY argument is used to |
84b08ed9 BW |
3079 | exclude cases like ADDI being "widened" to an ADDMI, which may |
3080 | later be relaxed to an ADDMI/ADDI pair. */ | |
7fa3d080 | 3081 | |
84b08ed9 BW |
3082 | bfd_boolean |
3083 | xg_is_single_relaxable_insn (TInsn *insn, TInsn *targ, bfd_boolean narrow_only) | |
7fa3d080 BW |
3084 | { |
3085 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3086 | TransitionList *l; | |
84b08ed9 | 3087 | TransitionRule *match = 0; |
7fa3d080 | 3088 | |
9c2799c2 NC |
3089 | gas_assert (insn->insn_type == ITYPE_INSN); |
3090 | gas_assert (insn->opcode < table->num_opcodes); | |
7fa3d080 BW |
3091 | |
3092 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3093 | { | |
3094 | TransitionRule *rule = l->rule; | |
3095 | ||
3096 | if (xg_instruction_matches_rule (insn, rule) | |
84b08ed9 BW |
3097 | && is_unique_insn_expansion (rule) |
3098 | && (xg_get_single_size (insn->opcode) + (narrow_only ? 1 : 0) | |
3099 | <= xg_get_single_size (rule->to_instr->opcode))) | |
7fa3d080 | 3100 | { |
84b08ed9 BW |
3101 | if (match) |
3102 | return FALSE; | |
3103 | match = rule; | |
7fa3d080 BW |
3104 | } |
3105 | } | |
84b08ed9 BW |
3106 | if (!match) |
3107 | return FALSE; | |
3108 | ||
3109 | if (targ) | |
3110 | xg_build_to_insn (targ, insn, match->to_instr); | |
3111 | return TRUE; | |
7fa3d080 BW |
3112 | } |
3113 | ||
3114 | ||
3115 | /* Return the maximum number of bytes this opcode can expand to. */ | |
3116 | ||
3117 | static int | |
3118 | xg_get_max_insn_widen_size (xtensa_opcode opcode) | |
3119 | { | |
3120 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3121 | TransitionList *l; | |
3122 | int max_size = xg_get_single_size (opcode); | |
3123 | ||
9c2799c2 | 3124 | gas_assert (opcode < table->num_opcodes); |
7fa3d080 BW |
3125 | |
3126 | for (l = table->table[opcode]; l != NULL; l = l->next) | |
3127 | { | |
3128 | TransitionRule *rule = l->rule; | |
3129 | BuildInstr *build_list; | |
3130 | int this_size = 0; | |
3131 | ||
3132 | if (!rule) | |
3133 | continue; | |
3134 | build_list = rule->to_instr; | |
3135 | if (is_unique_insn_expansion (rule)) | |
3136 | { | |
9c2799c2 | 3137 | gas_assert (build_list->typ == INSTR_INSTR); |
7fa3d080 BW |
3138 | this_size = xg_get_max_insn_widen_size (build_list->opcode); |
3139 | } | |
3140 | else | |
3141 | for (; build_list != NULL; build_list = build_list->next) | |
3142 | { | |
3143 | switch (build_list->typ) | |
3144 | { | |
3145 | case INSTR_INSTR: | |
3146 | this_size += xg_get_single_size (build_list->opcode); | |
3147 | break; | |
3148 | case INSTR_LITERAL_DEF: | |
3149 | case INSTR_LABEL_DEF: | |
e0001a05 NC |
3150 | default: |
3151 | break; | |
3152 | } | |
3153 | } | |
3154 | if (this_size > max_size) | |
3155 | max_size = this_size; | |
3156 | } | |
3157 | return max_size; | |
3158 | } | |
3159 | ||
3160 | ||
3161 | /* Return the maximum number of literal bytes this opcode can generate. */ | |
3162 | ||
7fa3d080 BW |
3163 | static int |
3164 | xg_get_max_insn_widen_literal_size (xtensa_opcode opcode) | |
e0001a05 | 3165 | { |
43cd72b9 | 3166 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); |
e0001a05 NC |
3167 | TransitionList *l; |
3168 | int max_size = 0; | |
3169 | ||
9c2799c2 | 3170 | gas_assert (opcode < table->num_opcodes); |
e0001a05 NC |
3171 | |
3172 | for (l = table->table[opcode]; l != NULL; l = l->next) | |
3173 | { | |
3174 | TransitionRule *rule = l->rule; | |
3175 | BuildInstr *build_list; | |
3176 | int this_size = 0; | |
3177 | ||
3178 | if (!rule) | |
3179 | continue; | |
3180 | build_list = rule->to_instr; | |
3181 | if (is_unique_insn_expansion (rule)) | |
3182 | { | |
9c2799c2 | 3183 | gas_assert (build_list->typ == INSTR_INSTR); |
e0001a05 NC |
3184 | this_size = xg_get_max_insn_widen_literal_size (build_list->opcode); |
3185 | } | |
3186 | else | |
3187 | for (; build_list != NULL; build_list = build_list->next) | |
3188 | { | |
3189 | switch (build_list->typ) | |
3190 | { | |
3191 | case INSTR_LITERAL_DEF: | |
43cd72b9 | 3192 | /* Hard-coded 4-byte literal. */ |
e0001a05 NC |
3193 | this_size += 4; |
3194 | break; | |
3195 | case INSTR_INSTR: | |
3196 | case INSTR_LABEL_DEF: | |
3197 | default: | |
3198 | break; | |
3199 | } | |
3200 | } | |
3201 | if (this_size > max_size) | |
3202 | max_size = this_size; | |
3203 | } | |
3204 | return max_size; | |
3205 | } | |
3206 | ||
3207 | ||
7fa3d080 BW |
3208 | static bfd_boolean |
3209 | xg_is_relaxable_insn (TInsn *insn, int lateral_steps) | |
3210 | { | |
3211 | int steps_taken = 0; | |
3212 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); | |
3213 | TransitionList *l; | |
3214 | ||
9c2799c2 NC |
3215 | gas_assert (insn->insn_type == ITYPE_INSN); |
3216 | gas_assert (insn->opcode < table->num_opcodes); | |
7fa3d080 BW |
3217 | |
3218 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3219 | { | |
3220 | TransitionRule *rule = l->rule; | |
3221 | ||
3222 | if (xg_instruction_matches_rule (insn, rule)) | |
3223 | { | |
3224 | if (steps_taken == lateral_steps) | |
3225 | return TRUE; | |
3226 | steps_taken++; | |
3227 | } | |
3228 | } | |
3229 | return FALSE; | |
3230 | } | |
3231 | ||
3232 | ||
3233 | static symbolS * | |
3234 | get_special_literal_symbol (void) | |
3235 | { | |
3236 | static symbolS *sym = NULL; | |
3237 | ||
3238 | if (sym == NULL) | |
3239 | sym = symbol_find_or_make ("SPECIAL_LITERAL0\001"); | |
3240 | return sym; | |
3241 | } | |
3242 | ||
3243 | ||
3244 | static symbolS * | |
3245 | get_special_label_symbol (void) | |
3246 | { | |
3247 | static symbolS *sym = NULL; | |
3248 | ||
3249 | if (sym == NULL) | |
3250 | sym = symbol_find_or_make ("SPECIAL_LABEL0\001"); | |
3251 | return sym; | |
3252 | } | |
3253 | ||
3254 | ||
3255 | static bfd_boolean | |
3256 | xg_valid_literal_expression (const expressionS *exp) | |
3257 | { | |
3258 | switch (exp->X_op) | |
3259 | { | |
3260 | case O_constant: | |
3261 | case O_symbol: | |
3262 | case O_big: | |
3263 | case O_uminus: | |
3264 | case O_subtract: | |
3265 | case O_pltrel: | |
1bbb5f21 | 3266 | case O_pcrel: |
28dbbc02 BW |
3267 | case O_tlsfunc: |
3268 | case O_tlsarg: | |
3269 | case O_tpoff: | |
3270 | case O_dtpoff: | |
7fa3d080 BW |
3271 | return TRUE; |
3272 | default: | |
3273 | return FALSE; | |
3274 | } | |
3275 | } | |
3276 | ||
3277 | ||
3278 | /* This will check to see if the value can be converted into the | |
3279 | operand type. It will return TRUE if it does not fit. */ | |
3280 | ||
3281 | static bfd_boolean | |
3282 | xg_check_operand (int32 value, xtensa_opcode opcode, int operand) | |
3283 | { | |
3284 | uint32 valbuf = value; | |
3285 | if (xtensa_operand_encode (xtensa_default_isa, opcode, operand, &valbuf)) | |
3286 | return TRUE; | |
3287 | return FALSE; | |
3288 | } | |
3289 | ||
3290 | ||
3291 | /* Assumes: All immeds are constants. Check that all constants fit | |
3292 | into their immeds; return FALSE if not. */ | |
3293 | ||
3294 | static bfd_boolean | |
3295 | xg_immeds_fit (const TInsn *insn) | |
3296 | { | |
3297 | xtensa_isa isa = xtensa_default_isa; | |
3298 | int i; | |
3299 | ||
3300 | int n = insn->ntok; | |
9c2799c2 | 3301 | gas_assert (insn->insn_type == ITYPE_INSN); |
7fa3d080 BW |
3302 | for (i = 0; i < n; ++i) |
3303 | { | |
91d6fa6a NC |
3304 | const expressionS *exp = &insn->tok[i]; |
3305 | ||
7fa3d080 BW |
3306 | if (xtensa_operand_is_register (isa, insn->opcode, i) == 1) |
3307 | continue; | |
3308 | ||
91d6fa6a | 3309 | switch (exp->X_op) |
7fa3d080 BW |
3310 | { |
3311 | case O_register: | |
3312 | case O_constant: | |
91d6fa6a | 3313 | if (xg_check_operand (exp->X_add_number, insn->opcode, i)) |
7fa3d080 BW |
3314 | return FALSE; |
3315 | break; | |
3316 | ||
3317 | default: | |
3318 | /* The symbol should have a fixup associated with it. */ | |
9c2799c2 | 3319 | gas_assert (FALSE); |
7fa3d080 BW |
3320 | break; |
3321 | } | |
3322 | } | |
3323 | return TRUE; | |
3324 | } | |
3325 | ||
3326 | ||
3327 | /* This should only be called after we have an initial | |
3328 | estimate of the addresses. */ | |
3329 | ||
3330 | static bfd_boolean | |
3331 | xg_symbolic_immeds_fit (const TInsn *insn, | |
3332 | segT pc_seg, | |
3333 | fragS *pc_frag, | |
3334 | offsetT pc_offset, | |
3335 | long stretch) | |
e0001a05 | 3336 | { |
7fa3d080 BW |
3337 | xtensa_isa isa = xtensa_default_isa; |
3338 | symbolS *symbolP; | |
3339 | fragS *sym_frag; | |
3340 | offsetT target, pc; | |
3341 | uint32 new_offset; | |
3342 | int i; | |
3343 | int n = insn->ntok; | |
e0001a05 | 3344 | |
9c2799c2 | 3345 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 | 3346 | |
7fa3d080 | 3347 | for (i = 0; i < n; ++i) |
e0001a05 | 3348 | { |
91d6fa6a NC |
3349 | const expressionS *exp = &insn->tok[i]; |
3350 | ||
7fa3d080 BW |
3351 | if (xtensa_operand_is_register (isa, insn->opcode, i) == 1) |
3352 | continue; | |
e0001a05 | 3353 | |
91d6fa6a | 3354 | switch (exp->X_op) |
e0001a05 | 3355 | { |
7fa3d080 BW |
3356 | case O_register: |
3357 | case O_constant: | |
91d6fa6a | 3358 | if (xg_check_operand (exp->X_add_number, insn->opcode, i)) |
7fa3d080 BW |
3359 | return FALSE; |
3360 | break; | |
e0001a05 | 3361 | |
7fa3d080 BW |
3362 | case O_lo16: |
3363 | case O_hi16: | |
3364 | /* Check for the worst case. */ | |
3365 | if (xg_check_operand (0xffff, insn->opcode, i)) | |
3366 | return FALSE; | |
3367 | break; | |
e0001a05 | 3368 | |
7fa3d080 | 3369 | case O_symbol: |
7c834684 | 3370 | /* We only allow symbols for PC-relative references. |
7fa3d080 | 3371 | If pc_frag == 0, then we don't have frag locations yet. */ |
7c834684 BW |
3372 | if (pc_frag == 0 |
3373 | || xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 0) | |
7fa3d080 | 3374 | return FALSE; |
e0001a05 | 3375 | |
8e6bc631 BW |
3376 | /* If it is a weak symbol or a symbol in a different section, |
3377 | it cannot be known to fit at assembly time. */ | |
91d6fa6a NC |
3378 | if (S_IS_WEAK (exp->X_add_symbol) |
3379 | || S_GET_SEGMENT (exp->X_add_symbol) != pc_seg) | |
7c834684 | 3380 | { |
8e6bc631 | 3381 | /* For a direct call with --no-longcalls, be optimistic and |
38f9cb7f BW |
3382 | assume it will be in range. If the symbol is weak and |
3383 | undefined, it may remain undefined at link-time, in which | |
3384 | case it will have a zero value and almost certainly be out | |
3385 | of range for a direct call; thus, relax for undefined weak | |
3386 | symbols even if longcalls is not enabled. */ | |
8e6bc631 | 3387 | if (is_direct_call_opcode (insn->opcode) |
38f9cb7f | 3388 | && ! pc_frag->tc_frag_data.use_longcalls |
91d6fa6a NC |
3389 | && (! S_IS_WEAK (exp->X_add_symbol) |
3390 | || S_IS_DEFINED (exp->X_add_symbol))) | |
7c834684 | 3391 | return TRUE; |
7c834684 | 3392 | |
8e6bc631 BW |
3393 | return FALSE; |
3394 | } | |
e0001a05 | 3395 | |
91d6fa6a | 3396 | symbolP = exp->X_add_symbol; |
7fa3d080 | 3397 | sym_frag = symbol_get_frag (symbolP); |
91d6fa6a | 3398 | target = S_GET_VALUE (symbolP) + exp->X_add_number; |
7fa3d080 | 3399 | pc = pc_frag->fr_address + pc_offset; |
e0001a05 | 3400 | |
7fa3d080 BW |
3401 | /* If frag has yet to be reached on this pass, assume it |
3402 | will move by STRETCH just as we did. If this is not so, | |
3403 | it will be because some frag between grows, and that will | |
3404 | force another pass. Beware zero-length frags. There | |
3405 | should be a faster way to do this. */ | |
3406 | ||
3407 | if (stretch != 0 | |
3408 | && sym_frag->relax_marker != pc_frag->relax_marker | |
3409 | && S_GET_SEGMENT (symbolP) == pc_seg) | |
3410 | { | |
3411 | target += stretch; | |
3412 | } | |
c138bc38 | 3413 | |
7fa3d080 BW |
3414 | new_offset = target; |
3415 | xtensa_operand_do_reloc (isa, insn->opcode, i, &new_offset, pc); | |
3416 | if (xg_check_operand (new_offset, insn->opcode, i)) | |
3417 | return FALSE; | |
3418 | break; | |
3419 | ||
3420 | default: | |
3421 | /* The symbol should have a fixup associated with it. */ | |
3422 | return FALSE; | |
3423 | } | |
3424 | } | |
3425 | ||
3426 | return TRUE; | |
e0001a05 NC |
3427 | } |
3428 | ||
3429 | ||
43cd72b9 | 3430 | /* Return TRUE on success. */ |
e0001a05 | 3431 | |
7fa3d080 BW |
3432 | static bfd_boolean |
3433 | xg_build_to_insn (TInsn *targ, TInsn *insn, BuildInstr *bi) | |
e0001a05 NC |
3434 | { |
3435 | BuildOp *op; | |
3436 | symbolS *sym; | |
3437 | ||
60242db2 | 3438 | tinsn_init (targ); |
b224e962 BW |
3439 | targ->debug_line = insn->debug_line; |
3440 | targ->loc_directive_seen = insn->loc_directive_seen; | |
e0001a05 NC |
3441 | switch (bi->typ) |
3442 | { | |
3443 | case INSTR_INSTR: | |
3444 | op = bi->ops; | |
3445 | targ->opcode = bi->opcode; | |
3446 | targ->insn_type = ITYPE_INSN; | |
3447 | targ->is_specific_opcode = FALSE; | |
3448 | ||
3449 | for (; op != NULL; op = op->next) | |
3450 | { | |
3451 | int op_num = op->op_num; | |
3452 | int op_data = op->op_data; | |
3453 | ||
9c2799c2 | 3454 | gas_assert (op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3455 | |
3456 | if (targ->ntok <= op_num) | |
3457 | targ->ntok = op_num + 1; | |
3458 | ||
3459 | switch (op->typ) | |
3460 | { | |
3461 | case OP_CONSTANT: | |
3462 | set_expr_const (&targ->tok[op_num], op_data); | |
3463 | break; | |
3464 | case OP_OPERAND: | |
9c2799c2 | 3465 | gas_assert (op_data < insn->ntok); |
e0001a05 NC |
3466 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); |
3467 | break; | |
19e8f41a BW |
3468 | case OP_FREEREG: |
3469 | if (insn->extra_arg.X_op != O_register) | |
3470 | return FALSE; | |
3471 | copy_expr (&targ->tok[op_num], &insn->extra_arg); | |
3472 | break; | |
e0001a05 NC |
3473 | case OP_LITERAL: |
3474 | sym = get_special_literal_symbol (); | |
3475 | set_expr_symbol_offset (&targ->tok[op_num], sym, 0); | |
28dbbc02 BW |
3476 | if (insn->tok[op_data].X_op == O_tlsfunc |
3477 | || insn->tok[op_data].X_op == O_tlsarg) | |
19e8f41a | 3478 | copy_expr (&targ->extra_arg, &insn->tok[op_data]); |
e0001a05 NC |
3479 | break; |
3480 | case OP_LABEL: | |
3481 | sym = get_special_label_symbol (); | |
3482 | set_expr_symbol_offset (&targ->tok[op_num], sym, 0); | |
3483 | break; | |
43cd72b9 BW |
3484 | case OP_OPERAND_HI16U: |
3485 | case OP_OPERAND_LOW16U: | |
9c2799c2 | 3486 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3487 | if (expr_is_const (&insn->tok[op_data])) |
3488 | { | |
3489 | long val; | |
3490 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3491 | val = xg_apply_userdef_op_fn (op->typ, | |
3492 | targ->tok[op_num]. | |
3493 | X_add_number); | |
3494 | targ->tok[op_num].X_add_number = val; | |
3495 | } | |
3496 | else | |
3497 | { | |
3498 | /* For const16 we can create relocations for these. */ | |
3499 | if (targ->opcode == XTENSA_UNDEFINED | |
3500 | || (targ->opcode != xtensa_const16_opcode)) | |
3501 | return FALSE; | |
9c2799c2 | 3502 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3503 | /* Need to build a O_lo16 or O_hi16. */ |
3504 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3505 | if (targ->tok[op_num].X_op == O_symbol) | |
3506 | { | |
3507 | if (op->typ == OP_OPERAND_HI16U) | |
3508 | targ->tok[op_num].X_op = O_hi16; | |
3509 | else if (op->typ == OP_OPERAND_LOW16U) | |
3510 | targ->tok[op_num].X_op = O_lo16; | |
3511 | else | |
3512 | return FALSE; | |
3513 | } | |
3514 | } | |
3515 | break; | |
e0001a05 NC |
3516 | default: |
3517 | /* currently handles: | |
3518 | OP_OPERAND_LOW8 | |
3519 | OP_OPERAND_HI24S | |
3520 | OP_OPERAND_F32MINUS */ | |
3521 | if (xg_has_userdef_op_fn (op->typ)) | |
3522 | { | |
9c2799c2 | 3523 | gas_assert (op_data < insn->ntok); |
e0001a05 NC |
3524 | if (expr_is_const (&insn->tok[op_data])) |
3525 | { | |
3526 | long val; | |
3527 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); | |
3528 | val = xg_apply_userdef_op_fn (op->typ, | |
3529 | targ->tok[op_num]. | |
3530 | X_add_number); | |
3531 | targ->tok[op_num].X_add_number = val; | |
3532 | } | |
3533 | else | |
3534 | return FALSE; /* We cannot use a relocation for this. */ | |
3535 | break; | |
3536 | } | |
9c2799c2 | 3537 | gas_assert (0); |
e0001a05 NC |
3538 | break; |
3539 | } | |
3540 | } | |
3541 | break; | |
3542 | ||
3543 | case INSTR_LITERAL_DEF: | |
3544 | op = bi->ops; | |
3545 | targ->opcode = XTENSA_UNDEFINED; | |
3546 | targ->insn_type = ITYPE_LITERAL; | |
3547 | targ->is_specific_opcode = FALSE; | |
3548 | for (; op != NULL; op = op->next) | |
3549 | { | |
3550 | int op_num = op->op_num; | |
3551 | int op_data = op->op_data; | |
9c2799c2 | 3552 | gas_assert (op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3553 | |
3554 | if (targ->ntok <= op_num) | |
3555 | targ->ntok = op_num + 1; | |
3556 | ||
3557 | switch (op->typ) | |
3558 | { | |
3559 | case OP_OPERAND: | |
9c2799c2 | 3560 | gas_assert (op_data < insn->ntok); |
43cd72b9 BW |
3561 | /* We can only pass resolvable literals through. */ |
3562 | if (!xg_valid_literal_expression (&insn->tok[op_data])) | |
3563 | return FALSE; | |
e0001a05 NC |
3564 | copy_expr (&targ->tok[op_num], &insn->tok[op_data]); |
3565 | break; | |
3566 | case OP_LITERAL: | |
3567 | case OP_CONSTANT: | |
3568 | case OP_LABEL: | |
3569 | default: | |
9c2799c2 | 3570 | gas_assert (0); |
e0001a05 NC |
3571 | break; |
3572 | } | |
3573 | } | |
3574 | break; | |
3575 | ||
3576 | case INSTR_LABEL_DEF: | |
3577 | op = bi->ops; | |
3578 | targ->opcode = XTENSA_UNDEFINED; | |
3579 | targ->insn_type = ITYPE_LABEL; | |
3580 | targ->is_specific_opcode = FALSE; | |
43cd72b9 | 3581 | /* Literal with no ops is a label? */ |
9c2799c2 | 3582 | gas_assert (op == NULL); |
e0001a05 NC |
3583 | break; |
3584 | ||
3585 | default: | |
9c2799c2 | 3586 | gas_assert (0); |
e0001a05 NC |
3587 | } |
3588 | ||
3589 | return TRUE; | |
3590 | } | |
3591 | ||
3592 | ||
43cd72b9 | 3593 | /* Return TRUE on success. */ |
e0001a05 | 3594 | |
7fa3d080 BW |
3595 | static bfd_boolean |
3596 | xg_build_to_stack (IStack *istack, TInsn *insn, BuildInstr *bi) | |
e0001a05 NC |
3597 | { |
3598 | for (; bi != NULL; bi = bi->next) | |
3599 | { | |
3600 | TInsn *next_insn = istack_push_space (istack); | |
3601 | ||
3602 | if (!xg_build_to_insn (next_insn, insn, bi)) | |
3603 | return FALSE; | |
3604 | } | |
3605 | return TRUE; | |
3606 | } | |
3607 | ||
3608 | ||
43cd72b9 | 3609 | /* Return TRUE on valid expansion. */ |
e0001a05 | 3610 | |
7fa3d080 BW |
3611 | static bfd_boolean |
3612 | xg_expand_to_stack (IStack *istack, TInsn *insn, int lateral_steps) | |
e0001a05 NC |
3613 | { |
3614 | int stack_size = istack->ninsn; | |
3615 | int steps_taken = 0; | |
43cd72b9 | 3616 | TransitionTable *table = xg_build_widen_table (&transition_rule_cmp); |
e0001a05 NC |
3617 | TransitionList *l; |
3618 | ||
9c2799c2 NC |
3619 | gas_assert (insn->insn_type == ITYPE_INSN); |
3620 | gas_assert (insn->opcode < table->num_opcodes); | |
e0001a05 NC |
3621 | |
3622 | for (l = table->table[insn->opcode]; l != NULL; l = l->next) | |
3623 | { | |
3624 | TransitionRule *rule = l->rule; | |
3625 | ||
3626 | if (xg_instruction_matches_rule (insn, rule)) | |
3627 | { | |
3628 | if (lateral_steps == steps_taken) | |
3629 | { | |
3630 | int i; | |
3631 | ||
3632 | /* This is it. Expand the rule to the stack. */ | |
3633 | if (!xg_build_to_stack (istack, insn, rule->to_instr)) | |
3634 | return FALSE; | |
3635 | ||
3636 | /* Check to see if it fits. */ | |
3637 | for (i = stack_size; i < istack->ninsn; i++) | |
3638 | { | |
91d6fa6a | 3639 | TInsn *tinsn = &istack->insn[i]; |
e0001a05 | 3640 | |
91d6fa6a NC |
3641 | if (tinsn->insn_type == ITYPE_INSN |
3642 | && !tinsn_has_symbolic_operands (tinsn) | |
3643 | && !xg_immeds_fit (tinsn)) | |
e0001a05 NC |
3644 | { |
3645 | istack->ninsn = stack_size; | |
3646 | return FALSE; | |
3647 | } | |
3648 | } | |
3649 | return TRUE; | |
3650 | } | |
3651 | steps_taken++; | |
3652 | } | |
3653 | } | |
3654 | return FALSE; | |
3655 | } | |
3656 | ||
43cd72b9 | 3657 | \f |
43cd72b9 | 3658 | /* Relax the assembly instruction at least "min_steps". |
b81bf389 BW |
3659 | Return the number of steps taken. |
3660 | ||
3661 | For relaxation to correctly terminate, every relaxation chain must | |
3662 | terminate in one of two ways: | |
3663 | ||
3664 | 1. If the chain from one instruction to the next consists entirely of | |
3665 | single instructions, then the chain *must* handle all possible | |
3666 | immediates without failing. It must not ever fail because an | |
3667 | immediate is out of range. The MOVI.N -> MOVI -> L32R relaxation | |
3668 | chain is one example. L32R loads 32 bits, and there cannot be an | |
3669 | immediate larger than 32 bits, so it satisfies this condition. | |
3670 | Single instruction relaxation chains are as defined by | |
3671 | xg_is_single_relaxable_instruction. | |
3672 | ||
3673 | 2. Otherwise, the chain must end in a multi-instruction expansion: e.g., | |
3674 | BNEZ.N -> BNEZ -> BNEZ.W15 -> BENZ.N/J | |
3675 | ||
3676 | Strictly speaking, in most cases you can violate condition 1 and be OK | |
3677 | -- in particular when the last two instructions have the same single | |
3678 | size. But nevertheless, you should guarantee the above two conditions. | |
3679 | ||
3680 | We could fix this so that single-instruction expansions correctly | |
3681 | terminate when they can't handle the range, but the error messages are | |
3682 | worse, and it actually turns out that in every case but one (18-bit wide | |
3683 | branches), you need a multi-instruction expansion to get the full range | |
3684 | anyway. And because 18-bit branches are handled identically to 15-bit | |
3685 | branches, there isn't any point in changing it. */ | |
e0001a05 | 3686 | |
7fa3d080 BW |
3687 | static int |
3688 | xg_assembly_relax (IStack *istack, | |
3689 | TInsn *insn, | |
3690 | segT pc_seg, | |
3691 | fragS *pc_frag, /* if pc_frag == 0, not pc-relative */ | |
3692 | offsetT pc_offset, /* offset in fragment */ | |
3693 | int min_steps, /* minimum conversion steps */ | |
3694 | long stretch) /* number of bytes stretched so far */ | |
e0001a05 NC |
3695 | { |
3696 | int steps_taken = 0; | |
3697 | ||
b81bf389 BW |
3698 | /* Some of its immeds don't fit. Try to build a relaxed version. |
3699 | This may go through a couple of stages of single instruction | |
3700 | transformations before we get there. */ | |
e0001a05 NC |
3701 | |
3702 | TInsn single_target; | |
3703 | TInsn current_insn; | |
3704 | int lateral_steps = 0; | |
3705 | int istack_size = istack->ninsn; | |
3706 | ||
3707 | if (xg_symbolic_immeds_fit (insn, pc_seg, pc_frag, pc_offset, stretch) | |
3708 | && steps_taken >= min_steps) | |
3709 | { | |
3710 | istack_push (istack, insn); | |
3711 | return steps_taken; | |
3712 | } | |
43cd72b9 | 3713 | current_insn = *insn; |
e0001a05 | 3714 | |
7c834684 | 3715 | /* Walk through all of the single instruction expansions. */ |
84b08ed9 | 3716 | while (xg_is_single_relaxable_insn (¤t_insn, &single_target, FALSE)) |
e0001a05 | 3717 | { |
21af2bbd | 3718 | steps_taken++; |
e0001a05 NC |
3719 | if (xg_symbolic_immeds_fit (&single_target, pc_seg, pc_frag, pc_offset, |
3720 | stretch)) | |
3721 | { | |
e0001a05 NC |
3722 | if (steps_taken >= min_steps) |
3723 | { | |
3724 | istack_push (istack, &single_target); | |
3725 | return steps_taken; | |
3726 | } | |
3727 | } | |
43cd72b9 | 3728 | current_insn = single_target; |
e0001a05 NC |
3729 | } |
3730 | ||
3731 | /* Now check for a multi-instruction expansion. */ | |
3732 | while (xg_is_relaxable_insn (¤t_insn, lateral_steps)) | |
3733 | { | |
3734 | if (xg_symbolic_immeds_fit (¤t_insn, pc_seg, pc_frag, pc_offset, | |
3735 | stretch)) | |
3736 | { | |
3737 | if (steps_taken >= min_steps) | |
3738 | { | |
3739 | istack_push (istack, ¤t_insn); | |
3740 | return steps_taken; | |
3741 | } | |
3742 | } | |
3743 | steps_taken++; | |
3744 | if (xg_expand_to_stack (istack, ¤t_insn, lateral_steps)) | |
3745 | { | |
3746 | if (steps_taken >= min_steps) | |
3747 | return steps_taken; | |
3748 | } | |
3749 | lateral_steps++; | |
3750 | istack->ninsn = istack_size; | |
3751 | } | |
3752 | ||
3753 | /* It's not going to work -- use the original. */ | |
3754 | istack_push (istack, insn); | |
3755 | return steps_taken; | |
3756 | } | |
3757 | ||
3758 | ||
7fa3d080 BW |
3759 | static void |
3760 | xg_finish_frag (char *last_insn, | |
3761 | enum xtensa_relax_statesE frag_state, | |
3762 | enum xtensa_relax_statesE slot0_state, | |
3763 | int max_growth, | |
3764 | bfd_boolean is_insn) | |
e0001a05 NC |
3765 | { |
3766 | /* Finish off this fragment so that it has at LEAST the desired | |
3767 | max_growth. If it doesn't fit in this fragment, close this one | |
3768 | and start a new one. In either case, return a pointer to the | |
3769 | beginning of the growth area. */ | |
3770 | ||
3771 | fragS *old_frag; | |
43cd72b9 | 3772 | |
542f8b94 | 3773 | frag_grow (max_growth); |
e0001a05 NC |
3774 | old_frag = frag_now; |
3775 | ||
3776 | frag_now->fr_opcode = last_insn; | |
3777 | if (is_insn) | |
3778 | frag_now->tc_frag_data.is_insn = TRUE; | |
3779 | ||
3780 | frag_var (rs_machine_dependent, max_growth, max_growth, | |
43cd72b9 BW |
3781 | frag_state, frag_now->fr_symbol, frag_now->fr_offset, last_insn); |
3782 | ||
3783 | old_frag->tc_frag_data.slot_subtypes[0] = slot0_state; | |
3784 | xtensa_set_frag_assembly_state (frag_now); | |
e0001a05 NC |
3785 | |
3786 | /* Just to make sure that we did not split it up. */ | |
9c2799c2 | 3787 | gas_assert (old_frag->fr_next == frag_now); |
e0001a05 NC |
3788 | } |
3789 | ||
3790 | ||
7fa3d080 BW |
3791 | /* Return TRUE if the target frag is one of the next non-empty frags. */ |
3792 | ||
3793 | static bfd_boolean | |
3794 | is_next_frag_target (const fragS *fragP, const fragS *target) | |
3795 | { | |
3796 | if (fragP == NULL) | |
3797 | return FALSE; | |
3798 | ||
3799 | for (; fragP; fragP = fragP->fr_next) | |
3800 | { | |
3801 | if (fragP == target) | |
3802 | return TRUE; | |
3803 | if (fragP->fr_fix != 0) | |
3804 | return FALSE; | |
3805 | if (fragP->fr_type == rs_fill && fragP->fr_offset != 0) | |
3806 | return FALSE; | |
3807 | if ((fragP->fr_type == rs_align || fragP->fr_type == rs_align_code) | |
3808 | && ((fragP->fr_address % (1 << fragP->fr_offset)) != 0)) | |
3809 | return FALSE; | |
3810 | if (fragP->fr_type == rs_space) | |
3811 | return FALSE; | |
3812 | } | |
3813 | return FALSE; | |
3814 | } | |
3815 | ||
3816 | ||
e0001a05 | 3817 | static bfd_boolean |
7fa3d080 | 3818 | is_branch_jmp_to_next (TInsn *insn, fragS *fragP) |
e0001a05 NC |
3819 | { |
3820 | xtensa_isa isa = xtensa_default_isa; | |
3821 | int i; | |
43cd72b9 | 3822 | int num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
e0001a05 NC |
3823 | int target_op = -1; |
3824 | symbolS *sym; | |
3825 | fragS *target_frag; | |
3826 | ||
64b607e6 BW |
3827 | if (xtensa_opcode_is_branch (isa, insn->opcode) != 1 |
3828 | && xtensa_opcode_is_jump (isa, insn->opcode) != 1) | |
e0001a05 NC |
3829 | return FALSE; |
3830 | ||
3831 | for (i = 0; i < num_ops; i++) | |
3832 | { | |
43cd72b9 | 3833 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1) |
e0001a05 NC |
3834 | { |
3835 | target_op = i; | |
3836 | break; | |
3837 | } | |
3838 | } | |
3839 | if (target_op == -1) | |
3840 | return FALSE; | |
3841 | ||
3842 | if (insn->ntok <= target_op) | |
3843 | return FALSE; | |
3844 | ||
3845 | if (insn->tok[target_op].X_op != O_symbol) | |
3846 | return FALSE; | |
3847 | ||
3848 | sym = insn->tok[target_op].X_add_symbol; | |
3849 | if (sym == NULL) | |
3850 | return FALSE; | |
3851 | ||
3852 | if (insn->tok[target_op].X_add_number != 0) | |
3853 | return FALSE; | |
3854 | ||
3855 | target_frag = symbol_get_frag (sym); | |
3856 | if (target_frag == NULL) | |
3857 | return FALSE; | |
3858 | ||
c138bc38 | 3859 | if (is_next_frag_target (fragP->fr_next, target_frag) |
e0001a05 NC |
3860 | && S_GET_VALUE (sym) == target_frag->fr_address) |
3861 | return TRUE; | |
3862 | ||
3863 | return FALSE; | |
3864 | } | |
3865 | ||
3866 | ||
3867 | static void | |
7fa3d080 | 3868 | xg_add_branch_and_loop_targets (TInsn *insn) |
e0001a05 NC |
3869 | { |
3870 | xtensa_isa isa = xtensa_default_isa; | |
7fa3d080 | 3871 | int num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
43cd72b9 | 3872 | |
7fa3d080 BW |
3873 | if (xtensa_opcode_is_loop (isa, insn->opcode) == 1) |
3874 | { | |
3875 | int i = 1; | |
3876 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1 | |
3877 | && insn->tok[i].X_op == O_symbol) | |
3878 | symbol_get_tc (insn->tok[i].X_add_symbol)->is_loop_target = TRUE; | |
3879 | return; | |
3880 | } | |
e0001a05 | 3881 | |
7fa3d080 BW |
3882 | if (xtensa_opcode_is_branch (isa, insn->opcode) == 1 |
3883 | || xtensa_opcode_is_loop (isa, insn->opcode) == 1) | |
e0001a05 | 3884 | { |
7fa3d080 BW |
3885 | int i; |
3886 | ||
3887 | for (i = 0; i < insn->ntok && i < num_ops; i++) | |
3888 | { | |
3889 | if (xtensa_operand_is_PCrelative (isa, insn->opcode, i) == 1 | |
3890 | && insn->tok[i].X_op == O_symbol) | |
3891 | { | |
3892 | symbolS *sym = insn->tok[i].X_add_symbol; | |
3893 | symbol_get_tc (sym)->is_branch_target = TRUE; | |
3894 | if (S_IS_DEFINED (sym)) | |
3895 | symbol_get_frag (sym)->tc_frag_data.is_branch_target = TRUE; | |
3896 | } | |
3897 | } | |
e0001a05 | 3898 | } |
e0001a05 NC |
3899 | } |
3900 | ||
3901 | ||
43cd72b9 | 3902 | /* Return FALSE if no error. */ |
e0001a05 | 3903 | |
7fa3d080 BW |
3904 | static bfd_boolean |
3905 | xg_build_token_insn (BuildInstr *instr_spec, TInsn *old_insn, TInsn *new_insn) | |
e0001a05 NC |
3906 | { |
3907 | int num_ops = 0; | |
3908 | BuildOp *b_op; | |
3909 | ||
3910 | switch (instr_spec->typ) | |
3911 | { | |
3912 | case INSTR_INSTR: | |
3913 | new_insn->insn_type = ITYPE_INSN; | |
3914 | new_insn->opcode = instr_spec->opcode; | |
e0001a05 NC |
3915 | break; |
3916 | case INSTR_LITERAL_DEF: | |
3917 | new_insn->insn_type = ITYPE_LITERAL; | |
3918 | new_insn->opcode = XTENSA_UNDEFINED; | |
e0001a05 NC |
3919 | break; |
3920 | case INSTR_LABEL_DEF: | |
b224e962 | 3921 | abort (); |
e0001a05 | 3922 | } |
b224e962 BW |
3923 | new_insn->is_specific_opcode = FALSE; |
3924 | new_insn->debug_line = old_insn->debug_line; | |
3925 | new_insn->loc_directive_seen = old_insn->loc_directive_seen; | |
e0001a05 NC |
3926 | |
3927 | for (b_op = instr_spec->ops; b_op != NULL; b_op = b_op->next) | |
3928 | { | |
3929 | expressionS *exp; | |
3930 | const expressionS *src_exp; | |
3931 | ||
3932 | num_ops++; | |
3933 | switch (b_op->typ) | |
3934 | { | |
3935 | case OP_CONSTANT: | |
3936 | /* The expression must be the constant. */ | |
9c2799c2 | 3937 | gas_assert (b_op->op_num < MAX_INSN_ARGS); |
e0001a05 NC |
3938 | exp = &new_insn->tok[b_op->op_num]; |
3939 | set_expr_const (exp, b_op->op_data); | |
3940 | break; | |
3941 | ||
3942 | case OP_OPERAND: | |
9c2799c2 NC |
3943 | gas_assert (b_op->op_num < MAX_INSN_ARGS); |
3944 | gas_assert (b_op->op_data < (unsigned) old_insn->ntok); | |
e0001a05 NC |
3945 | src_exp = &old_insn->tok[b_op->op_data]; |
3946 | exp = &new_insn->tok[b_op->op_num]; | |
3947 | copy_expr (exp, src_exp); | |
3948 | break; | |
3949 | ||
3950 | case OP_LITERAL: | |
3951 | case OP_LABEL: | |
3952 | as_bad (_("can't handle generation of literal/labels yet")); | |
9c2799c2 | 3953 | gas_assert (0); |
e0001a05 NC |
3954 | |
3955 | default: | |
3956 | as_bad (_("can't handle undefined OP TYPE")); | |
9c2799c2 | 3957 | gas_assert (0); |
e0001a05 NC |
3958 | } |
3959 | } | |
3960 | ||
3961 | new_insn->ntok = num_ops; | |
3962 | return FALSE; | |
3963 | } | |
3964 | ||
3965 | ||
43cd72b9 | 3966 | /* Return TRUE if it was simplified. */ |
e0001a05 | 3967 | |
7fa3d080 BW |
3968 | static bfd_boolean |
3969 | xg_simplify_insn (TInsn *old_insn, TInsn *new_insn) | |
e0001a05 | 3970 | { |
43cd72b9 | 3971 | TransitionRule *rule; |
e0001a05 | 3972 | BuildInstr *insn_spec; |
43cd72b9 BW |
3973 | |
3974 | if (old_insn->is_specific_opcode || !density_supported) | |
3975 | return FALSE; | |
3976 | ||
3977 | rule = xg_instruction_match (old_insn); | |
e0001a05 NC |
3978 | if (rule == NULL) |
3979 | return FALSE; | |
3980 | ||
3981 | insn_spec = rule->to_instr; | |
3982 | /* There should only be one. */ | |
9c2799c2 NC |
3983 | gas_assert (insn_spec != NULL); |
3984 | gas_assert (insn_spec->next == NULL); | |
e0001a05 NC |
3985 | if (insn_spec->next != NULL) |
3986 | return FALSE; | |
3987 | ||
3988 | xg_build_token_insn (insn_spec, old_insn, new_insn); | |
3989 | ||
3990 | return TRUE; | |
3991 | } | |
3992 | ||
3993 | ||
3994 | /* xg_expand_assembly_insn: (1) Simplify the instruction, i.e., l32i -> | |
3995 | l32i.n. (2) Check the number of operands. (3) Place the instruction | |
7c834684 BW |
3996 | tokens into the stack or relax it and place multiple |
3997 | instructions/literals onto the stack. Return FALSE if no error. */ | |
e0001a05 NC |
3998 | |
3999 | static bfd_boolean | |
7fa3d080 | 4000 | xg_expand_assembly_insn (IStack *istack, TInsn *orig_insn) |
e0001a05 NC |
4001 | { |
4002 | int noperands; | |
4003 | TInsn new_insn; | |
7c834684 BW |
4004 | bfd_boolean do_expand; |
4005 | ||
60242db2 | 4006 | tinsn_init (&new_insn); |
e0001a05 | 4007 | |
43cd72b9 BW |
4008 | /* Narrow it if we can. xg_simplify_insn now does all the |
4009 | appropriate checking (e.g., for the density option). */ | |
4010 | if (xg_simplify_insn (orig_insn, &new_insn)) | |
4011 | orig_insn = &new_insn; | |
e0001a05 | 4012 | |
43cd72b9 BW |
4013 | noperands = xtensa_opcode_num_operands (xtensa_default_isa, |
4014 | orig_insn->opcode); | |
e0001a05 NC |
4015 | if (orig_insn->ntok < noperands) |
4016 | { | |
4017 | as_bad (_("found %d operands for '%s': Expected %d"), | |
4018 | orig_insn->ntok, | |
4019 | xtensa_opcode_name (xtensa_default_isa, orig_insn->opcode), | |
4020 | noperands); | |
4021 | return TRUE; | |
4022 | } | |
4023 | if (orig_insn->ntok > noperands) | |
4024 | as_warn (_("found too many (%d) operands for '%s': Expected %d"), | |
4025 | orig_insn->ntok, | |
4026 | xtensa_opcode_name (xtensa_default_isa, orig_insn->opcode), | |
4027 | noperands); | |
4028 | ||
43cd72b9 | 4029 | /* If there are not enough operands, we will assert above. If there |
e0001a05 | 4030 | are too many, just cut out the extras here. */ |
e0001a05 NC |
4031 | orig_insn->ntok = noperands; |
4032 | ||
e0001a05 NC |
4033 | if (tinsn_has_invalid_symbolic_operands (orig_insn)) |
4034 | return TRUE; | |
4035 | ||
d12f9798 BW |
4036 | /* Special case for extui opcode which has constraints not handled |
4037 | by the ordinary operand encoding checks. The number of operands | |
4038 | and related syntax issues have already been checked. */ | |
4039 | if (orig_insn->opcode == xtensa_extui_opcode) | |
4040 | { | |
4041 | int shiftimm = orig_insn->tok[2].X_add_number; | |
4042 | int maskimm = orig_insn->tok[3].X_add_number; | |
4043 | if (shiftimm + maskimm > 32) | |
4044 | { | |
4045 | as_bad (_("immediate operands sum to greater than 32")); | |
4046 | return TRUE; | |
4047 | } | |
4048 | } | |
4049 | ||
7c834684 BW |
4050 | /* If the instruction will definitely need to be relaxed, it is better |
4051 | to expand it now for better scheduling. Decide whether to expand | |
4052 | now.... */ | |
4053 | do_expand = (!orig_insn->is_specific_opcode && use_transform ()); | |
4054 | ||
4055 | /* Calls should be expanded to longcalls only in the backend relaxation | |
4056 | so that the assembly scheduler will keep the L32R/CALLX instructions | |
4057 | adjacent. */ | |
4058 | if (is_direct_call_opcode (orig_insn->opcode)) | |
4059 | do_expand = FALSE; | |
e0001a05 NC |
4060 | |
4061 | if (tinsn_has_symbolic_operands (orig_insn)) | |
4062 | { | |
7c834684 BW |
4063 | /* The values of symbolic operands are not known yet, so only expand |
4064 | now if an operand is "complex" (e.g., difference of symbols) and | |
4065 | will have to be stored as a literal regardless of the value. */ | |
4066 | if (!tinsn_has_complex_operands (orig_insn)) | |
4067 | do_expand = FALSE; | |
e0001a05 | 4068 | } |
7c834684 BW |
4069 | else if (xg_immeds_fit (orig_insn)) |
4070 | do_expand = FALSE; | |
4071 | ||
4072 | if (do_expand) | |
4073 | xg_assembly_relax (istack, orig_insn, 0, 0, 0, 0, 0); | |
e0001a05 | 4074 | else |
7c834684 | 4075 | istack_push (istack, orig_insn); |
e0001a05 | 4076 | |
e0001a05 NC |
4077 | return FALSE; |
4078 | } | |
4079 | ||
4080 | ||
7fa3d080 | 4081 | /* Return TRUE if the section flags are marked linkonce |
74869ac7 BW |
4082 | or the name is .gnu.linkonce.*. */ |
4083 | ||
4084 | static int linkonce_len = sizeof (".gnu.linkonce.") - 1; | |
7fa3d080 BW |
4085 | |
4086 | static bfd_boolean | |
4087 | get_is_linkonce_section (bfd *abfd ATTRIBUTE_UNUSED, segT sec) | |
4088 | { | |
4089 | flagword flags, link_once_flags; | |
4090 | ||
4091 | flags = bfd_get_section_flags (abfd, sec); | |
4092 | link_once_flags = (flags & SEC_LINK_ONCE); | |
4093 | ||
4094 | /* Flags might not be set yet. */ | |
74869ac7 BW |
4095 | if (!link_once_flags |
4096 | && strncmp (segment_name (sec), ".gnu.linkonce.", linkonce_len) == 0) | |
4097 | link_once_flags = SEC_LINK_ONCE; | |
7fa3d080 | 4098 | |
7fa3d080 BW |
4099 | return (link_once_flags != 0); |
4100 | } | |
4101 | ||
4102 | ||
4103 | static void | |
4104 | xtensa_add_literal_sym (symbolS *sym) | |
4105 | { | |
4106 | sym_list *l; | |
4107 | ||
325801bd | 4108 | l = XNEW (sym_list); |
7fa3d080 BW |
4109 | l->sym = sym; |
4110 | l->next = literal_syms; | |
4111 | literal_syms = l; | |
4112 | } | |
4113 | ||
4114 | ||
4115 | static symbolS * | |
4116 | xtensa_create_literal_symbol (segT sec, fragS *frag) | |
4117 | { | |
4118 | static int lit_num = 0; | |
4119 | static char name[256]; | |
4120 | symbolS *symbolP; | |
4121 | ||
4122 | sprintf (name, ".L_lit_sym%d", lit_num); | |
4123 | ||
4124 | /* Create a local symbol. If it is in a linkonce section, we have to | |
4125 | be careful to make sure that if it is used in a relocation that the | |
4126 | symbol will be in the output file. */ | |
4127 | if (get_is_linkonce_section (stdoutput, sec)) | |
4128 | { | |
4129 | symbolP = symbol_new (name, sec, 0, frag); | |
4130 | S_CLEAR_EXTERNAL (symbolP); | |
4131 | /* symbolP->local = 1; */ | |
4132 | } | |
4133 | else | |
4134 | symbolP = symbol_new (name, sec, 0, frag); | |
4135 | ||
4136 | xtensa_add_literal_sym (symbolP); | |
4137 | ||
7fa3d080 BW |
4138 | lit_num++; |
4139 | return symbolP; | |
4140 | } | |
4141 | ||
4142 | ||
e0001a05 NC |
4143 | /* Currently all literals that are generated here are 32-bit L32R targets. */ |
4144 | ||
7fa3d080 BW |
4145 | static symbolS * |
4146 | xg_assemble_literal (/* const */ TInsn *insn) | |
e0001a05 NC |
4147 | { |
4148 | emit_state state; | |
4149 | symbolS *lit_sym = NULL; | |
bbdd25a8 | 4150 | bfd_reloc_code_real_type reloc; |
1bbb5f21 | 4151 | bfd_boolean pcrel = FALSE; |
bbdd25a8 | 4152 | char *p; |
e0001a05 NC |
4153 | |
4154 | /* size = 4 for L32R. It could easily be larger when we move to | |
4155 | larger constants. Add a parameter later. */ | |
4156 | offsetT litsize = 4; | |
4157 | offsetT litalign = 2; /* 2^2 = 4 */ | |
4158 | expressionS saved_loc; | |
43cd72b9 BW |
4159 | expressionS * emit_val; |
4160 | ||
e0001a05 NC |
4161 | set_expr_symbol_offset (&saved_loc, frag_now->fr_symbol, frag_now_fix ()); |
4162 | ||
9c2799c2 NC |
4163 | gas_assert (insn->insn_type == ITYPE_LITERAL); |
4164 | gas_assert (insn->ntok == 1); /* must be only one token here */ | |
e0001a05 NC |
4165 | |
4166 | xtensa_switch_to_literal_fragment (&state); | |
4167 | ||
43cd72b9 BW |
4168 | emit_val = &insn->tok[0]; |
4169 | if (emit_val->X_op == O_big) | |
4170 | { | |
4171 | int size = emit_val->X_add_number * CHARS_PER_LITTLENUM; | |
4172 | if (size > litsize) | |
4173 | { | |
4174 | /* This happens when someone writes a "movi a2, big_number". */ | |
c138bc38 | 4175 | as_bad_where (frag_now->fr_file, frag_now->fr_line, |
43cd72b9 BW |
4176 | _("invalid immediate")); |
4177 | xtensa_restore_emit_state (&state); | |
4178 | return NULL; | |
4179 | } | |
4180 | } | |
4181 | ||
e0001a05 NC |
4182 | /* Force a 4-byte align here. Note that this opens a new frag, so all |
4183 | literals done with this function have a frag to themselves. That's | |
4184 | important for the way text section literals work. */ | |
4185 | frag_align (litalign, 0, 0); | |
43cd72b9 | 4186 | record_alignment (now_seg, litalign); |
e0001a05 | 4187 | |
bbdd25a8 | 4188 | switch (emit_val->X_op) |
43cd72b9 | 4189 | { |
1bbb5f21 BW |
4190 | case O_pcrel: |
4191 | pcrel = TRUE; | |
4192 | /* fall through */ | |
bbdd25a8 | 4193 | case O_pltrel: |
28dbbc02 BW |
4194 | case O_tlsfunc: |
4195 | case O_tlsarg: | |
4196 | case O_tpoff: | |
4197 | case O_dtpoff: | |
bbdd25a8 | 4198 | p = frag_more (litsize); |
43cd72b9 | 4199 | xtensa_set_frag_assembly_state (frag_now); |
28dbbc02 | 4200 | reloc = map_operator_to_reloc (emit_val->X_op, TRUE); |
43cd72b9 BW |
4201 | if (emit_val->X_add_symbol) |
4202 | emit_val->X_op = O_symbol; | |
4203 | else | |
4204 | emit_val->X_op = O_constant; | |
4205 | fix_new_exp (frag_now, p - frag_now->fr_literal, | |
1bbb5f21 | 4206 | litsize, emit_val, pcrel, reloc); |
bbdd25a8 BW |
4207 | break; |
4208 | ||
4209 | default: | |
4210 | emit_expr (emit_val, litsize); | |
4211 | break; | |
43cd72b9 | 4212 | } |
e0001a05 | 4213 | |
9c2799c2 | 4214 | gas_assert (frag_now->tc_frag_data.literal_frag == NULL); |
e0001a05 NC |
4215 | frag_now->tc_frag_data.literal_frag = get_literal_pool_location (now_seg); |
4216 | frag_now->fr_symbol = xtensa_create_literal_symbol (now_seg, frag_now); | |
4217 | lit_sym = frag_now->fr_symbol; | |
e0001a05 NC |
4218 | |
4219 | /* Go back. */ | |
4220 | xtensa_restore_emit_state (&state); | |
4221 | return lit_sym; | |
4222 | } | |
4223 | ||
4224 | ||
4225 | static void | |
7fa3d080 | 4226 | xg_assemble_literal_space (/* const */ int size, int slot) |
e0001a05 NC |
4227 | { |
4228 | emit_state state; | |
43cd72b9 | 4229 | /* We might have to do something about this alignment. It only |
e0001a05 NC |
4230 | takes effect if something is placed here. */ |
4231 | offsetT litalign = 2; /* 2^2 = 4 */ | |
4232 | fragS *lit_saved_frag; | |
4233 | ||
9c2799c2 | 4234 | gas_assert (size % 4 == 0); |
e0001a05 NC |
4235 | |
4236 | xtensa_switch_to_literal_fragment (&state); | |
4237 | ||
4238 | /* Force a 4-byte align here. */ | |
4239 | frag_align (litalign, 0, 0); | |
43cd72b9 | 4240 | record_alignment (now_seg, litalign); |
e0001a05 | 4241 | |
542f8b94 | 4242 | frag_grow (size); |
e0001a05 NC |
4243 | |
4244 | lit_saved_frag = frag_now; | |
4245 | frag_now->tc_frag_data.literal_frag = get_literal_pool_location (now_seg); | |
e0001a05 | 4246 | frag_now->fr_symbol = xtensa_create_literal_symbol (now_seg, frag_now); |
43cd72b9 | 4247 | xg_finish_frag (0, RELAX_LITERAL, 0, size, FALSE); |
e0001a05 NC |
4248 | |
4249 | /* Go back. */ | |
4250 | xtensa_restore_emit_state (&state); | |
43cd72b9 | 4251 | frag_now->tc_frag_data.literal_frags[slot] = lit_saved_frag; |
e0001a05 NC |
4252 | } |
4253 | ||
4254 | ||
e0001a05 | 4255 | /* Put in a fixup record based on the opcode. |
43cd72b9 | 4256 | Return TRUE on success. */ |
e0001a05 | 4257 | |
7fa3d080 BW |
4258 | static bfd_boolean |
4259 | xg_add_opcode_fix (TInsn *tinsn, | |
4260 | int opnum, | |
4261 | xtensa_format fmt, | |
4262 | int slot, | |
91d6fa6a | 4263 | expressionS *exp, |
7fa3d080 BW |
4264 | fragS *fragP, |
4265 | offsetT offset) | |
43cd72b9 BW |
4266 | { |
4267 | xtensa_opcode opcode = tinsn->opcode; | |
4268 | bfd_reloc_code_real_type reloc; | |
4269 | reloc_howto_type *howto; | |
4270 | int fmt_length; | |
e0001a05 NC |
4271 | fixS *the_fix; |
4272 | ||
43cd72b9 BW |
4273 | reloc = BFD_RELOC_NONE; |
4274 | ||
4275 | /* First try the special cases for "alternate" relocs. */ | |
4276 | if (opcode == xtensa_l32r_opcode) | |
4277 | { | |
4278 | if (fragP->tc_frag_data.use_absolute_literals) | |
4279 | reloc = encode_alt_reloc (slot); | |
4280 | } | |
4281 | else if (opcode == xtensa_const16_opcode) | |
4282 | { | |
91d6fa6a | 4283 | if (exp->X_op == O_lo16) |
43cd72b9 BW |
4284 | { |
4285 | reloc = encode_reloc (slot); | |
91d6fa6a | 4286 | exp->X_op = O_symbol; |
43cd72b9 | 4287 | } |
91d6fa6a | 4288 | else if (exp->X_op == O_hi16) |
43cd72b9 BW |
4289 | { |
4290 | reloc = encode_alt_reloc (slot); | |
91d6fa6a | 4291 | exp->X_op = O_symbol; |
43cd72b9 BW |
4292 | } |
4293 | } | |
4294 | ||
4295 | if (opnum != get_relaxable_immed (opcode)) | |
e0001a05 | 4296 | { |
43cd72b9 | 4297 | as_bad (_("invalid relocation for operand %i of '%s'"), |
431ad2d0 | 4298 | opnum + 1, xtensa_opcode_name (xtensa_default_isa, opcode)); |
e0001a05 NC |
4299 | return FALSE; |
4300 | } | |
4301 | ||
43cd72b9 BW |
4302 | /* Handle erroneous "@h" and "@l" expressions here before they propagate |
4303 | into the symbol table where the generic portions of the assembler | |
4304 | won't know what to do with them. */ | |
91d6fa6a | 4305 | if (exp->X_op == O_lo16 || exp->X_op == O_hi16) |
43cd72b9 BW |
4306 | { |
4307 | as_bad (_("invalid expression for operand %i of '%s'"), | |
431ad2d0 | 4308 | opnum + 1, xtensa_opcode_name (xtensa_default_isa, opcode)); |
43cd72b9 BW |
4309 | return FALSE; |
4310 | } | |
4311 | ||
4312 | /* Next try the generic relocs. */ | |
4313 | if (reloc == BFD_RELOC_NONE) | |
4314 | reloc = encode_reloc (slot); | |
4315 | if (reloc == BFD_RELOC_NONE) | |
4316 | { | |
4317 | as_bad (_("invalid relocation in instruction slot %i"), slot); | |
4318 | return FALSE; | |
4319 | } | |
e0001a05 | 4320 | |
43cd72b9 | 4321 | howto = bfd_reloc_type_lookup (stdoutput, reloc); |
e0001a05 NC |
4322 | if (!howto) |
4323 | { | |
43cd72b9 | 4324 | as_bad (_("undefined symbol for opcode \"%s\""), |
e0001a05 NC |
4325 | xtensa_opcode_name (xtensa_default_isa, opcode)); |
4326 | return FALSE; | |
4327 | } | |
4328 | ||
43cd72b9 | 4329 | fmt_length = xtensa_format_length (xtensa_default_isa, fmt); |
91d6fa6a | 4330 | the_fix = fix_new_exp (fragP, offset, fmt_length, exp, |
e0001a05 | 4331 | howto->pc_relative, reloc); |
d9740523 | 4332 | the_fix->fx_no_overflow = 1; |
91d6fa6a NC |
4333 | the_fix->tc_fix_data.X_add_symbol = exp->X_add_symbol; |
4334 | the_fix->tc_fix_data.X_add_number = exp->X_add_number; | |
7fa3d080 | 4335 | the_fix->tc_fix_data.slot = slot; |
c138bc38 | 4336 | |
7fa3d080 BW |
4337 | return TRUE; |
4338 | } | |
4339 | ||
4340 | ||
4341 | static bfd_boolean | |
4342 | xg_emit_insn_to_buf (TInsn *tinsn, | |
7fa3d080 BW |
4343 | char *buf, |
4344 | fragS *fragP, | |
4345 | offsetT offset, | |
4346 | bfd_boolean build_fix) | |
4347 | { | |
4348 | static xtensa_insnbuf insnbuf = NULL; | |
4349 | bfd_boolean has_symbolic_immed = FALSE; | |
4350 | bfd_boolean ok = TRUE; | |
b2d179be | 4351 | |
7fa3d080 BW |
4352 | if (!insnbuf) |
4353 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
4354 | ||
4355 | has_symbolic_immed = tinsn_to_insnbuf (tinsn, insnbuf); | |
4356 | if (has_symbolic_immed && build_fix) | |
4357 | { | |
4358 | /* Add a fixup. */ | |
b2d179be BW |
4359 | xtensa_format fmt = xg_get_single_format (tinsn->opcode); |
4360 | int slot = xg_get_single_slot (tinsn->opcode); | |
7fa3d080 BW |
4361 | int opnum = get_relaxable_immed (tinsn->opcode); |
4362 | expressionS *exp = &tinsn->tok[opnum]; | |
43cd72b9 | 4363 | |
b2d179be | 4364 | if (!xg_add_opcode_fix (tinsn, opnum, fmt, slot, exp, fragP, offset)) |
7fa3d080 BW |
4365 | ok = FALSE; |
4366 | } | |
4367 | fragP->tc_frag_data.is_insn = TRUE; | |
d77b99c9 BW |
4368 | xtensa_insnbuf_to_chars (xtensa_default_isa, insnbuf, |
4369 | (unsigned char *) buf, 0); | |
7fa3d080 | 4370 | return ok; |
e0001a05 NC |
4371 | } |
4372 | ||
4373 | ||
7fa3d080 BW |
4374 | static void |
4375 | xg_resolve_literals (TInsn *insn, symbolS *lit_sym) | |
e0001a05 NC |
4376 | { |
4377 | symbolS *sym = get_special_literal_symbol (); | |
4378 | int i; | |
4379 | if (lit_sym == 0) | |
4380 | return; | |
9c2799c2 | 4381 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
4382 | for (i = 0; i < insn->ntok; i++) |
4383 | if (insn->tok[i].X_add_symbol == sym) | |
4384 | insn->tok[i].X_add_symbol = lit_sym; | |
4385 | ||
4386 | } | |
4387 | ||
4388 | ||
7fa3d080 BW |
4389 | static void |
4390 | xg_resolve_labels (TInsn *insn, symbolS *label_sym) | |
e0001a05 NC |
4391 | { |
4392 | symbolS *sym = get_special_label_symbol (); | |
4393 | int i; | |
e0001a05 NC |
4394 | for (i = 0; i < insn->ntok; i++) |
4395 | if (insn->tok[i].X_add_symbol == sym) | |
4396 | insn->tok[i].X_add_symbol = label_sym; | |
4397 | ||
4398 | } | |
4399 | ||
4400 | ||
43cd72b9 | 4401 | /* Return TRUE if the instruction can write to the specified |
e0001a05 NC |
4402 | integer register. */ |
4403 | ||
4404 | static bfd_boolean | |
7fa3d080 | 4405 | is_register_writer (const TInsn *insn, const char *regset, int regnum) |
e0001a05 NC |
4406 | { |
4407 | int i; | |
4408 | int num_ops; | |
4409 | xtensa_isa isa = xtensa_default_isa; | |
4410 | ||
43cd72b9 | 4411 | num_ops = xtensa_opcode_num_operands (isa, insn->opcode); |
e0001a05 NC |
4412 | |
4413 | for (i = 0; i < num_ops; i++) | |
4414 | { | |
43cd72b9 BW |
4415 | char inout; |
4416 | inout = xtensa_operand_inout (isa, insn->opcode, i); | |
4417 | if ((inout == 'o' || inout == 'm') | |
4418 | && xtensa_operand_is_register (isa, insn->opcode, i) == 1) | |
e0001a05 | 4419 | { |
43cd72b9 BW |
4420 | xtensa_regfile opnd_rf = |
4421 | xtensa_operand_regfile (isa, insn->opcode, i); | |
4422 | if (!strcmp (xtensa_regfile_shortname (isa, opnd_rf), regset)) | |
e0001a05 NC |
4423 | { |
4424 | if ((insn->tok[i].X_op == O_register) | |
4425 | && (insn->tok[i].X_add_number == regnum)) | |
4426 | return TRUE; | |
4427 | } | |
4428 | } | |
4429 | } | |
4430 | return FALSE; | |
4431 | } | |
4432 | ||
4433 | ||
4434 | static bfd_boolean | |
7fa3d080 | 4435 | is_bad_loopend_opcode (const TInsn *tinsn) |
e0001a05 NC |
4436 | { |
4437 | xtensa_opcode opcode = tinsn->opcode; | |
4438 | ||
4439 | if (opcode == XTENSA_UNDEFINED) | |
4440 | return FALSE; | |
4441 | ||
4442 | if (opcode == xtensa_call0_opcode | |
4443 | || opcode == xtensa_callx0_opcode | |
4444 | || opcode == xtensa_call4_opcode | |
4445 | || opcode == xtensa_callx4_opcode | |
4446 | || opcode == xtensa_call8_opcode | |
4447 | || opcode == xtensa_callx8_opcode | |
4448 | || opcode == xtensa_call12_opcode | |
4449 | || opcode == xtensa_callx12_opcode | |
4450 | || opcode == xtensa_isync_opcode | |
4451 | || opcode == xtensa_ret_opcode | |
4452 | || opcode == xtensa_ret_n_opcode | |
4453 | || opcode == xtensa_retw_opcode | |
4454 | || opcode == xtensa_retw_n_opcode | |
43cd72b9 BW |
4455 | || opcode == xtensa_waiti_opcode |
4456 | || opcode == xtensa_rsr_lcount_opcode) | |
e0001a05 | 4457 | return TRUE; |
c138bc38 | 4458 | |
e0001a05 NC |
4459 | return FALSE; |
4460 | } | |
4461 | ||
4462 | ||
4463 | /* Labels that begin with ".Ln" or ".LM" are unaligned. | |
4464 | This allows the debugger to add unaligned labels. | |
4465 | Also, the assembler generates stabs labels that need | |
4466 | not be aligned: FAKE_LABEL_NAME . {"F", "L", "endfunc"}. */ | |
4467 | ||
7fa3d080 BW |
4468 | static bfd_boolean |
4469 | is_unaligned_label (symbolS *sym) | |
e0001a05 NC |
4470 | { |
4471 | const char *name = S_GET_NAME (sym); | |
4472 | static size_t fake_size = 0; | |
4473 | ||
4474 | if (name | |
4475 | && name[0] == '.' | |
4476 | && name[1] == 'L' && (name[2] == 'n' || name[2] == 'M')) | |
4477 | return TRUE; | |
4478 | ||
4479 | /* FAKE_LABEL_NAME followed by "F", "L" or "endfunc" */ | |
4480 | if (fake_size == 0) | |
4481 | fake_size = strlen (FAKE_LABEL_NAME); | |
4482 | ||
43cd72b9 | 4483 | if (name |
e0001a05 NC |
4484 | && strncmp (FAKE_LABEL_NAME, name, fake_size) == 0 |
4485 | && (name[fake_size] == 'F' | |
4486 | || name[fake_size] == 'L' | |
4487 | || (name[fake_size] == 'e' | |
4488 | && strncmp ("endfunc", name+fake_size, 7) == 0))) | |
4489 | return TRUE; | |
4490 | ||
4491 | return FALSE; | |
4492 | } | |
4493 | ||
4494 | ||
7fa3d080 BW |
4495 | static fragS * |
4496 | next_non_empty_frag (const fragS *fragP) | |
e0001a05 NC |
4497 | { |
4498 | fragS *next_fragP = fragP->fr_next; | |
4499 | ||
c138bc38 | 4500 | /* Sometimes an empty will end up here due storage allocation issues. |
e0001a05 NC |
4501 | So we have to skip until we find something legit. */ |
4502 | while (next_fragP && next_fragP->fr_fix == 0) | |
4503 | next_fragP = next_fragP->fr_next; | |
4504 | ||
4505 | if (next_fragP == NULL || next_fragP->fr_fix == 0) | |
4506 | return NULL; | |
4507 | ||
4508 | return next_fragP; | |
4509 | } | |
4510 | ||
4511 | ||
43cd72b9 | 4512 | static bfd_boolean |
7fa3d080 | 4513 | next_frag_opcode_is_loop (const fragS *fragP, xtensa_opcode *opcode) |
43cd72b9 BW |
4514 | { |
4515 | xtensa_opcode out_opcode; | |
4516 | const fragS *next_fragP = next_non_empty_frag (fragP); | |
4517 | ||
4518 | if (next_fragP == NULL) | |
4519 | return FALSE; | |
4520 | ||
4521 | out_opcode = get_opcode_from_buf (next_fragP->fr_literal, 0); | |
4522 | if (xtensa_opcode_is_loop (xtensa_default_isa, out_opcode) == 1) | |
4523 | { | |
4524 | *opcode = out_opcode; | |
4525 | return TRUE; | |
4526 | } | |
4527 | return FALSE; | |
4528 | } | |
4529 | ||
4530 | ||
4531 | static int | |
7fa3d080 | 4532 | frag_format_size (const fragS *fragP) |
43cd72b9 | 4533 | { |
e0001a05 NC |
4534 | static xtensa_insnbuf insnbuf = NULL; |
4535 | xtensa_isa isa = xtensa_default_isa; | |
43cd72b9 | 4536 | xtensa_format fmt; |
c138bc38 | 4537 | int fmt_size; |
e0001a05 NC |
4538 | |
4539 | if (!insnbuf) | |
4540 | insnbuf = xtensa_insnbuf_alloc (isa); | |
4541 | ||
43cd72b9 BW |
4542 | if (fragP == NULL) |
4543 | return XTENSA_UNDEFINED; | |
4544 | ||
d77b99c9 BW |
4545 | xtensa_insnbuf_from_chars (isa, insnbuf, |
4546 | (unsigned char *) fragP->fr_literal, 0); | |
43cd72b9 BW |
4547 | |
4548 | fmt = xtensa_format_decode (isa, insnbuf); | |
4549 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 | 4550 | return XTENSA_UNDEFINED; |
43cd72b9 BW |
4551 | fmt_size = xtensa_format_length (isa, fmt); |
4552 | ||
4553 | /* If the next format won't be changing due to relaxation, just | |
4554 | return the length of the first format. */ | |
4555 | if (fragP->fr_opcode != fragP->fr_literal) | |
4556 | return fmt_size; | |
4557 | ||
c138bc38 | 4558 | /* If during relaxation we have to pull an instruction out of a |
43cd72b9 BW |
4559 | multi-slot instruction, we will return the more conservative |
4560 | number. This works because alignment on bigger instructions | |
4561 | is more restrictive than alignment on smaller instructions. | |
4562 | This is more conservative than we would like, but it happens | |
4563 | infrequently. */ | |
4564 | ||
4565 | if (xtensa_format_num_slots (xtensa_default_isa, fmt) > 1) | |
4566 | return fmt_size; | |
4567 | ||
4568 | /* If we aren't doing one of our own relaxations or it isn't | |
4569 | slot-based, then the insn size won't change. */ | |
4570 | if (fragP->fr_type != rs_machine_dependent) | |
4571 | return fmt_size; | |
4572 | if (fragP->fr_subtype != RELAX_SLOTS) | |
4573 | return fmt_size; | |
4574 | ||
4575 | /* If an instruction is about to grow, return the longer size. */ | |
4576 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP1 | |
b81bf389 BW |
4577 | || fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP2 |
4578 | || fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED_STEP3) | |
def13efb BW |
4579 | { |
4580 | /* For most frags at RELAX_IMMED_STEPX, with X > 0, the first | |
4581 | instruction in the relaxed version is of length 3. (The case | |
4582 | where we have to pull the instruction out of a FLIX bundle | |
4583 | is handled conservatively above.) However, frags with opcodes | |
4584 | that are expanding to wide branches end up having formats that | |
4585 | are not determinable by the RELAX_IMMED_STEPX enumeration, and | |
4586 | we can't tell directly what format the relaxer picked. This | |
4587 | is a wart in the design of the relaxer that should someday be | |
4588 | fixed, but would require major changes, or at least should | |
4589 | be accompanied by major changes to make use of that data. | |
4590 | ||
4591 | In any event, we can tell that we are expanding from a single-slot | |
19ef5f3d | 4592 | format to a wider one with the logic below. */ |
def13efb | 4593 | |
19ef5f3d SA |
4594 | int i; |
4595 | int relaxed_size = fmt_size + fragP->tc_frag_data.text_expansion[0]; | |
4596 | ||
4597 | for (i = 0; i < xtensa_isa_num_formats (isa); i++) | |
4598 | { | |
4599 | if (relaxed_size == xtensa_format_length (isa, i)) | |
4600 | return relaxed_size; | |
4601 | } | |
4602 | ||
4603 | return 3; | |
def13efb | 4604 | } |
c138bc38 | 4605 | |
43cd72b9 BW |
4606 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) |
4607 | return 2 + fragP->tc_frag_data.text_expansion[0]; | |
e0001a05 | 4608 | |
43cd72b9 | 4609 | return fmt_size; |
e0001a05 NC |
4610 | } |
4611 | ||
4612 | ||
7fa3d080 BW |
4613 | static int |
4614 | next_frag_format_size (const fragS *fragP) | |
e0001a05 | 4615 | { |
7fa3d080 BW |
4616 | const fragS *next_fragP = next_non_empty_frag (fragP); |
4617 | return frag_format_size (next_fragP); | |
e0001a05 NC |
4618 | } |
4619 | ||
4620 | ||
03aaa593 BW |
4621 | /* In early Xtensa Processors, for reasons that are unclear, the ISA |
4622 | required two-byte instructions to be treated as three-byte instructions | |
4623 | for loop instruction alignment. This restriction was removed beginning | |
4624 | with Xtensa LX. Now the only requirement on loop instruction alignment | |
4625 | is that the first instruction of the loop must appear at an address that | |
4626 | does not cross a fetch boundary. */ | |
4627 | ||
4628 | static int | |
4629 | get_loop_align_size (int insn_size) | |
4630 | { | |
4631 | if (insn_size == XTENSA_UNDEFINED) | |
4632 | return xtensa_fetch_width; | |
4633 | ||
4634 | if (enforce_three_byte_loop_align && insn_size == 2) | |
4635 | return 3; | |
4636 | ||
4637 | return insn_size; | |
4638 | } | |
4639 | ||
4640 | ||
e0001a05 NC |
4641 | /* If the next legit fragment is an end-of-loop marker, |
4642 | switch its state so it will instantiate a NOP. */ | |
4643 | ||
4644 | static void | |
1d19a770 | 4645 | update_next_frag_state (fragS *fragP) |
e0001a05 NC |
4646 | { |
4647 | fragS *next_fragP = fragP->fr_next; | |
43cd72b9 | 4648 | fragS *new_target = NULL; |
e0001a05 | 4649 | |
7b1cc377 | 4650 | if (align_targets) |
43cd72b9 BW |
4651 | { |
4652 | /* We are guaranteed there will be one of these... */ | |
4653 | while (!(next_fragP->fr_type == rs_machine_dependent | |
4654 | && (next_fragP->fr_subtype == RELAX_MAYBE_UNREACHABLE | |
4655 | || next_fragP->fr_subtype == RELAX_UNREACHABLE))) | |
4656 | next_fragP = next_fragP->fr_next; | |
4657 | ||
9c2799c2 | 4658 | gas_assert (next_fragP->fr_type == rs_machine_dependent |
43cd72b9 BW |
4659 | && (next_fragP->fr_subtype == RELAX_MAYBE_UNREACHABLE |
4660 | || next_fragP->fr_subtype == RELAX_UNREACHABLE)); | |
4661 | ||
4662 | /* ...and one of these. */ | |
4663 | new_target = next_fragP->fr_next; | |
4664 | while (!(new_target->fr_type == rs_machine_dependent | |
4665 | && (new_target->fr_subtype == RELAX_MAYBE_DESIRE_ALIGN | |
4666 | || new_target->fr_subtype == RELAX_DESIRE_ALIGN))) | |
4667 | new_target = new_target->fr_next; | |
4668 | ||
9c2799c2 | 4669 | gas_assert (new_target->fr_type == rs_machine_dependent |
43cd72b9 BW |
4670 | && (new_target->fr_subtype == RELAX_MAYBE_DESIRE_ALIGN |
4671 | || new_target->fr_subtype == RELAX_DESIRE_ALIGN)); | |
4672 | } | |
43cd72b9 | 4673 | |
1d19a770 | 4674 | while (next_fragP && next_fragP->fr_fix == 0) |
43cd72b9 | 4675 | { |
1d19a770 BW |
4676 | if (next_fragP->fr_type == rs_machine_dependent |
4677 | && next_fragP->fr_subtype == RELAX_LOOP_END) | |
43cd72b9 | 4678 | { |
1d19a770 BW |
4679 | next_fragP->fr_subtype = RELAX_LOOP_END_ADD_NOP; |
4680 | return; | |
e0001a05 | 4681 | } |
1d19a770 BW |
4682 | |
4683 | next_fragP = next_fragP->fr_next; | |
e0001a05 NC |
4684 | } |
4685 | } | |
4686 | ||
4687 | ||
4688 | static bfd_boolean | |
7fa3d080 | 4689 | next_frag_is_branch_target (const fragS *fragP) |
e0001a05 | 4690 | { |
43cd72b9 | 4691 | /* Sometimes an empty will end up here due to storage allocation issues, |
e0001a05 NC |
4692 | so we have to skip until we find something legit. */ |
4693 | for (fragP = fragP->fr_next; fragP; fragP = fragP->fr_next) | |
4694 | { | |
4695 | if (fragP->tc_frag_data.is_branch_target) | |
4696 | return TRUE; | |
4697 | if (fragP->fr_fix != 0) | |
4698 | break; | |
4699 | } | |
4700 | return FALSE; | |
4701 | } | |
4702 | ||
4703 | ||
4704 | static bfd_boolean | |
7fa3d080 | 4705 | next_frag_is_loop_target (const fragS *fragP) |
e0001a05 | 4706 | { |
c138bc38 | 4707 | /* Sometimes an empty will end up here due storage allocation issues. |
e0001a05 NC |
4708 | So we have to skip until we find something legit. */ |
4709 | for (fragP = fragP->fr_next; fragP; fragP = fragP->fr_next) | |
4710 | { | |
4711 | if (fragP->tc_frag_data.is_loop_target) | |
4712 | return TRUE; | |
4713 | if (fragP->fr_fix != 0) | |
4714 | break; | |
4715 | } | |
4716 | return FALSE; | |
4717 | } | |
4718 | ||
4719 | ||
3a1e9c4a SA |
4720 | /* As specified in the relaxation table, when a loop instruction is |
4721 | relaxed, there are 24 bytes between the loop instruction itself and | |
4722 | the first instruction in the loop. */ | |
4723 | ||
4724 | #define RELAXED_LOOP_INSN_BYTES 24 | |
4725 | ||
e0001a05 | 4726 | static addressT |
7fa3d080 | 4727 | next_frag_pre_opcode_bytes (const fragS *fragp) |
e0001a05 NC |
4728 | { |
4729 | const fragS *next_fragp = fragp->fr_next; | |
43cd72b9 | 4730 | xtensa_opcode next_opcode; |
e0001a05 | 4731 | |
43cd72b9 | 4732 | if (!next_frag_opcode_is_loop (fragp, &next_opcode)) |
e0001a05 NC |
4733 | return 0; |
4734 | ||
43cd72b9 BW |
4735 | /* Sometimes an empty will end up here due to storage allocation issues, |
4736 | so we have to skip until we find something legit. */ | |
e0001a05 NC |
4737 | while (next_fragp->fr_fix == 0) |
4738 | next_fragp = next_fragp->fr_next; | |
4739 | ||
4740 | if (next_fragp->fr_type != rs_machine_dependent) | |
4741 | return 0; | |
4742 | ||
4743 | /* There is some implicit knowledge encoded in here. | |
4744 | The LOOP instructions that are NOT RELAX_IMMED have | |
43cd72b9 BW |
4745 | been relaxed. Note that we can assume that the LOOP |
4746 | instruction is in slot 0 because loops aren't bundleable. */ | |
4747 | if (next_fragp->tc_frag_data.slot_subtypes[0] > RELAX_IMMED) | |
3a1e9c4a | 4748 | return get_expanded_loop_offset (next_opcode) + RELAXED_LOOP_INSN_BYTES; |
e0001a05 NC |
4749 | |
4750 | return 0; | |
4751 | } | |
4752 | ||
4753 | ||
4754 | /* Mark a location where we can later insert literal frags. Update | |
4755 | the section's literal_pool_loc, so subsequent literals can be | |
4756 | placed nearest to their use. */ | |
4757 | ||
4758 | static void | |
7fa3d080 | 4759 | xtensa_mark_literal_pool_location (void) |
e0001a05 NC |
4760 | { |
4761 | /* Any labels pointing to the current location need | |
4762 | to be adjusted to after the literal pool. */ | |
4763 | emit_state s; | |
e0001a05 | 4764 | fragS *pool_location; |
e0001a05 | 4765 | |
1f2a7e38 | 4766 | if (use_literal_section) |
43cd72b9 BW |
4767 | return; |
4768 | ||
dd49a749 BW |
4769 | /* We stash info in these frags so we can later move the literal's |
4770 | fixes into this frchain's fix list. */ | |
e0001a05 | 4771 | pool_location = frag_now; |
dd49a749 | 4772 | frag_now->tc_frag_data.lit_frchain = frchain_now; |
c48aaca0 | 4773 | frag_now->tc_frag_data.literal_frag = frag_now; |
b46824bd MF |
4774 | /* Just record this frag. */ |
4775 | xtensa_maybe_create_literal_pool_frag (FALSE, FALSE); | |
dd49a749 | 4776 | frag_variant (rs_machine_dependent, 0, 0, |
e0001a05 | 4777 | RELAX_LITERAL_POOL_BEGIN, NULL, 0, NULL); |
43cd72b9 | 4778 | xtensa_set_frag_assembly_state (frag_now); |
dd49a749 BW |
4779 | frag_now->tc_frag_data.lit_seg = now_seg; |
4780 | frag_variant (rs_machine_dependent, 0, 0, | |
e0001a05 | 4781 | RELAX_LITERAL_POOL_END, NULL, 0, NULL); |
43cd72b9 | 4782 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
4783 | |
4784 | /* Now put a frag into the literal pool that points to this location. */ | |
4785 | set_literal_pool_location (now_seg, pool_location); | |
43cd72b9 BW |
4786 | xtensa_switch_to_non_abs_literal_fragment (&s); |
4787 | frag_align (2, 0, 0); | |
4788 | record_alignment (now_seg, 2); | |
e0001a05 NC |
4789 | |
4790 | /* Close whatever frag is there. */ | |
4791 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 4792 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
4793 | frag_now->tc_frag_data.literal_frag = pool_location; |
4794 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
4795 | xtensa_restore_emit_state (&s); | |
43cd72b9 | 4796 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
4797 | } |
4798 | ||
4799 | ||
43cd72b9 BW |
4800 | /* Build a nop of the correct size into tinsn. */ |
4801 | ||
4802 | static void | |
7fa3d080 | 4803 | build_nop (TInsn *tinsn, int size) |
43cd72b9 BW |
4804 | { |
4805 | tinsn_init (tinsn); | |
4806 | switch (size) | |
4807 | { | |
4808 | case 2: | |
4809 | tinsn->opcode = xtensa_nop_n_opcode; | |
4810 | tinsn->ntok = 0; | |
4811 | if (tinsn->opcode == XTENSA_UNDEFINED) | |
4812 | as_fatal (_("opcode 'NOP.N' unavailable in this configuration")); | |
4813 | break; | |
4814 | ||
4815 | case 3: | |
4816 | if (xtensa_nop_opcode == XTENSA_UNDEFINED) | |
4817 | { | |
4818 | tinsn->opcode = xtensa_or_opcode; | |
4819 | set_expr_const (&tinsn->tok[0], 1); | |
4820 | set_expr_const (&tinsn->tok[1], 1); | |
4821 | set_expr_const (&tinsn->tok[2], 1); | |
4822 | tinsn->ntok = 3; | |
4823 | } | |
4824 | else | |
4825 | tinsn->opcode = xtensa_nop_opcode; | |
4826 | ||
9c2799c2 | 4827 | gas_assert (tinsn->opcode != XTENSA_UNDEFINED); |
43cd72b9 BW |
4828 | } |
4829 | } | |
4830 | ||
4831 | ||
e0001a05 NC |
4832 | /* Assemble a NOP of the requested size in the buffer. User must have |
4833 | allocated "buf" with at least "size" bytes. */ | |
4834 | ||
7fa3d080 | 4835 | static void |
d77b99c9 | 4836 | assemble_nop (int size, char *buf) |
e0001a05 NC |
4837 | { |
4838 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 4839 | TInsn tinsn; |
e0001a05 | 4840 | |
43cd72b9 | 4841 | build_nop (&tinsn, size); |
e0001a05 | 4842 | |
43cd72b9 BW |
4843 | if (!insnbuf) |
4844 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
e0001a05 | 4845 | |
43cd72b9 | 4846 | tinsn_to_insnbuf (&tinsn, insnbuf); |
d77b99c9 BW |
4847 | xtensa_insnbuf_to_chars (xtensa_default_isa, insnbuf, |
4848 | (unsigned char *) buf, 0); | |
e0001a05 NC |
4849 | } |
4850 | ||
4851 | ||
4852 | /* Return the number of bytes for the offset of the expanded loop | |
4853 | instruction. This should be incorporated into the relaxation | |
4854 | specification but is hard-coded here. This is used to auto-align | |
4855 | the loop instruction. It is invalid to call this function if the | |
4856 | configuration does not have loops or if the opcode is not a loop | |
4857 | opcode. */ | |
4858 | ||
4859 | static addressT | |
7fa3d080 | 4860 | get_expanded_loop_offset (xtensa_opcode opcode) |
e0001a05 NC |
4861 | { |
4862 | /* This is the OFFSET of the loop instruction in the expanded loop. | |
4863 | This MUST correspond directly to the specification of the loop | |
4864 | expansion. It will be validated on fragment conversion. */ | |
9c2799c2 | 4865 | gas_assert (opcode != XTENSA_UNDEFINED); |
e0001a05 NC |
4866 | if (opcode == xtensa_loop_opcode) |
4867 | return 0; | |
4868 | if (opcode == xtensa_loopnez_opcode) | |
4869 | return 3; | |
4870 | if (opcode == xtensa_loopgtz_opcode) | |
4871 | return 6; | |
4872 | as_fatal (_("get_expanded_loop_offset: invalid opcode")); | |
4873 | return 0; | |
4874 | } | |
4875 | ||
4876 | ||
7fa3d080 BW |
4877 | static fragS * |
4878 | get_literal_pool_location (segT seg) | |
e0001a05 | 4879 | { |
b46824bd MF |
4880 | struct litpool_seg *lps = litpool_seg_list.next; |
4881 | struct litpool_frag *lpf; | |
4882 | for ( ; lps && lps->seg->id != seg->id; lps = lps->next) | |
4883 | ; | |
4884 | if (lps) | |
4885 | { | |
4886 | for (lpf = lps->frag_list.prev; lpf->fragP; lpf = lpf->prev) | |
4887 | { /* Skip "candidates" for now. */ | |
4888 | if (lpf->fragP->fr_subtype == RELAX_LITERAL_POOL_BEGIN && | |
4889 | lpf->priority == 1) | |
4890 | return lpf->fragP; | |
4891 | } | |
4892 | /* Must convert a lower-priority pool. */ | |
4893 | for (lpf = lps->frag_list.prev; lpf->fragP; lpf = lpf->prev) | |
4894 | { | |
4895 | if (lpf->fragP->fr_subtype == RELAX_LITERAL_POOL_BEGIN) | |
4896 | return lpf->fragP; | |
4897 | } | |
4898 | /* Still no match -- try for a low priority pool. */ | |
4899 | for (lpf = lps->frag_list.prev; lpf->fragP; lpf = lpf->prev) | |
4900 | { | |
4901 | if (lpf->fragP->fr_subtype == RELAX_LITERAL_POOL_CANDIDATE_BEGIN) | |
4902 | return lpf->fragP; | |
4903 | } | |
4904 | } | |
e0001a05 NC |
4905 | return seg_info (seg)->tc_segment_info_data.literal_pool_loc; |
4906 | } | |
4907 | ||
4908 | ||
4909 | static void | |
7fa3d080 | 4910 | set_literal_pool_location (segT seg, fragS *literal_pool_loc) |
e0001a05 NC |
4911 | { |
4912 | seg_info (seg)->tc_segment_info_data.literal_pool_loc = literal_pool_loc; | |
4913 | } | |
4914 | ||
43cd72b9 BW |
4915 | |
4916 | /* Set frag assembly state should be called when a new frag is | |
4917 | opened and after a frag has been closed. */ | |
4918 | ||
7fa3d080 BW |
4919 | static void |
4920 | xtensa_set_frag_assembly_state (fragS *fragP) | |
43cd72b9 BW |
4921 | { |
4922 | if (!density_supported) | |
4923 | fragP->tc_frag_data.is_no_density = TRUE; | |
4924 | ||
4925 | /* This function is called from subsegs_finish, which is called | |
c138bc38 | 4926 | after xtensa_end, so we can't use "use_transform" or |
43cd72b9 BW |
4927 | "use_schedule" here. */ |
4928 | if (!directive_state[directive_transform]) | |
4929 | fragP->tc_frag_data.is_no_transform = TRUE; | |
7c834684 BW |
4930 | if (directive_state[directive_longcalls]) |
4931 | fragP->tc_frag_data.use_longcalls = TRUE; | |
43cd72b9 BW |
4932 | fragP->tc_frag_data.use_absolute_literals = |
4933 | directive_state[directive_absolute_literals]; | |
4934 | fragP->tc_frag_data.is_assembly_state_set = TRUE; | |
4935 | } | |
4936 | ||
4937 | ||
7fa3d080 BW |
4938 | static bfd_boolean |
4939 | relaxable_section (asection *sec) | |
43cd72b9 | 4940 | { |
11ac2671 BW |
4941 | return ((sec->flags & SEC_DEBUGGING) == 0 |
4942 | && strcmp (sec->name, ".eh_frame") != 0); | |
43cd72b9 BW |
4943 | } |
4944 | ||
4945 | ||
99ded152 BW |
4946 | static void |
4947 | xtensa_mark_frags_for_org (void) | |
4948 | { | |
4949 | segT *seclist; | |
4950 | ||
4951 | /* Walk over each fragment of all of the current segments. If we find | |
4952 | a .org frag in any of the segments, mark all frags prior to it as | |
4953 | "no transform", which will prevent linker optimizations from messing | |
4954 | up the .org distance. This should be done after | |
4955 | xtensa_find_unmarked_state_frags, because we don't want to worry here | |
4956 | about that function trashing the data we save here. */ | |
4957 | ||
4958 | for (seclist = &stdoutput->sections; | |
4959 | seclist && *seclist; | |
4960 | seclist = &(*seclist)->next) | |
4961 | { | |
4962 | segT sec = *seclist; | |
4963 | segment_info_type *seginfo; | |
4964 | fragS *fragP; | |
4965 | flagword flags; | |
4966 | flags = bfd_get_section_flags (stdoutput, sec); | |
4967 | if (flags & SEC_DEBUGGING) | |
4968 | continue; | |
4969 | if (!(flags & SEC_ALLOC)) | |
4970 | continue; | |
4971 | ||
4972 | seginfo = seg_info (sec); | |
4973 | if (seginfo && seginfo->frchainP) | |
4974 | { | |
4975 | fragS *last_fragP = seginfo->frchainP->frch_root; | |
4976 | for (fragP = seginfo->frchainP->frch_root; fragP; | |
4977 | fragP = fragP->fr_next) | |
4978 | { | |
4979 | /* cvt_frag_to_fill has changed the fr_type of org frags to | |
4980 | rs_fill, so use the value as cached in rs_subtype here. */ | |
4981 | if (fragP->fr_subtype == RELAX_ORG) | |
4982 | { | |
4983 | while (last_fragP != fragP->fr_next) | |
4984 | { | |
4985 | last_fragP->tc_frag_data.is_no_transform = TRUE; | |
4986 | last_fragP = last_fragP->fr_next; | |
4987 | } | |
4988 | } | |
4989 | } | |
4990 | } | |
4991 | } | |
4992 | } | |
4993 | ||
4994 | ||
43cd72b9 | 4995 | static void |
7fa3d080 | 4996 | xtensa_find_unmarked_state_frags (void) |
43cd72b9 BW |
4997 | { |
4998 | segT *seclist; | |
4999 | ||
5000 | /* Walk over each fragment of all of the current segments. For each | |
5001 | unmarked fragment, mark it with the same info as the previous | |
5002 | fragment. */ | |
5003 | for (seclist = &stdoutput->sections; | |
5004 | seclist && *seclist; | |
5005 | seclist = &(*seclist)->next) | |
5006 | { | |
5007 | segT sec = *seclist; | |
5008 | segment_info_type *seginfo; | |
5009 | fragS *fragP; | |
5010 | flagword flags; | |
5011 | flags = bfd_get_section_flags (stdoutput, sec); | |
5012 | if (flags & SEC_DEBUGGING) | |
5013 | continue; | |
5014 | if (!(flags & SEC_ALLOC)) | |
5015 | continue; | |
5016 | ||
5017 | seginfo = seg_info (sec); | |
5018 | if (seginfo && seginfo->frchainP) | |
5019 | { | |
5020 | fragS *last_fragP = 0; | |
5021 | for (fragP = seginfo->frchainP->frch_root; fragP; | |
5022 | fragP = fragP->fr_next) | |
5023 | { | |
5024 | if (fragP->fr_fix != 0 | |
5025 | && !fragP->tc_frag_data.is_assembly_state_set) | |
5026 | { | |
5027 | if (last_fragP == 0) | |
5028 | { | |
5029 | as_warn_where (fragP->fr_file, fragP->fr_line, | |
5030 | _("assembly state not set for first frag in section %s"), | |
5031 | sec->name); | |
5032 | } | |
5033 | else | |
5034 | { | |
5035 | fragP->tc_frag_data.is_assembly_state_set = TRUE; | |
5036 | fragP->tc_frag_data.is_no_density = | |
5037 | last_fragP->tc_frag_data.is_no_density; | |
5038 | fragP->tc_frag_data.is_no_transform = | |
5039 | last_fragP->tc_frag_data.is_no_transform; | |
7c834684 BW |
5040 | fragP->tc_frag_data.use_longcalls = |
5041 | last_fragP->tc_frag_data.use_longcalls; | |
43cd72b9 BW |
5042 | fragP->tc_frag_data.use_absolute_literals = |
5043 | last_fragP->tc_frag_data.use_absolute_literals; | |
5044 | } | |
5045 | } | |
5046 | if (fragP->tc_frag_data.is_assembly_state_set) | |
5047 | last_fragP = fragP; | |
5048 | } | |
5049 | } | |
5050 | } | |
5051 | } | |
5052 | ||
5053 | ||
5054 | static void | |
7fa3d080 BW |
5055 | xtensa_find_unaligned_branch_targets (bfd *abfd ATTRIBUTE_UNUSED, |
5056 | asection *sec, | |
5057 | void *unused ATTRIBUTE_UNUSED) | |
43cd72b9 BW |
5058 | { |
5059 | flagword flags = bfd_get_section_flags (abfd, sec); | |
5060 | segment_info_type *seginfo = seg_info (sec); | |
5061 | fragS *frag = seginfo->frchainP->frch_root; | |
c138bc38 | 5062 | |
43cd72b9 | 5063 | if (flags & SEC_CODE) |
c138bc38 | 5064 | { |
43cd72b9 BW |
5065 | xtensa_isa isa = xtensa_default_isa; |
5066 | xtensa_insnbuf insnbuf = xtensa_insnbuf_alloc (isa); | |
5067 | while (frag != NULL) | |
5068 | { | |
5069 | if (frag->tc_frag_data.is_branch_target) | |
5070 | { | |
5071 | int op_size; | |
664df4e4 | 5072 | addressT branch_align, frag_addr; |
43cd72b9 BW |
5073 | xtensa_format fmt; |
5074 | ||
d77b99c9 BW |
5075 | xtensa_insnbuf_from_chars |
5076 | (isa, insnbuf, (unsigned char *) frag->fr_literal, 0); | |
43cd72b9 BW |
5077 | fmt = xtensa_format_decode (isa, insnbuf); |
5078 | op_size = xtensa_format_length (isa, fmt); | |
664df4e4 BW |
5079 | branch_align = 1 << branch_align_power (sec); |
5080 | frag_addr = frag->fr_address % branch_align; | |
5081 | if (frag_addr + op_size > branch_align) | |
43cd72b9 BW |
5082 | as_warn_where (frag->fr_file, frag->fr_line, |
5083 | _("unaligned branch target: %d bytes at 0x%lx"), | |
dd49a749 | 5084 | op_size, (long) frag->fr_address); |
43cd72b9 BW |
5085 | } |
5086 | frag = frag->fr_next; | |
5087 | } | |
5088 | xtensa_insnbuf_free (isa, insnbuf); | |
5089 | } | |
5090 | } | |
5091 | ||
5092 | ||
5093 | static void | |
7fa3d080 BW |
5094 | xtensa_find_unaligned_loops (bfd *abfd ATTRIBUTE_UNUSED, |
5095 | asection *sec, | |
5096 | void *unused ATTRIBUTE_UNUSED) | |
43cd72b9 BW |
5097 | { |
5098 | flagword flags = bfd_get_section_flags (abfd, sec); | |
5099 | segment_info_type *seginfo = seg_info (sec); | |
5100 | fragS *frag = seginfo->frchainP->frch_root; | |
5101 | xtensa_isa isa = xtensa_default_isa; | |
c138bc38 | 5102 | |
43cd72b9 | 5103 | if (flags & SEC_CODE) |
c138bc38 | 5104 | { |
43cd72b9 BW |
5105 | xtensa_insnbuf insnbuf = xtensa_insnbuf_alloc (isa); |
5106 | while (frag != NULL) | |
5107 | { | |
5108 | if (frag->tc_frag_data.is_first_loop_insn) | |
5109 | { | |
5110 | int op_size; | |
d77b99c9 | 5111 | addressT frag_addr; |
43cd72b9 BW |
5112 | xtensa_format fmt; |
5113 | ||
3c83b96e SA |
5114 | if (frag->fr_fix == 0) |
5115 | frag = next_non_empty_frag (frag); | |
3739860c | 5116 | |
3c83b96e SA |
5117 | if (frag) |
5118 | { | |
5119 | xtensa_insnbuf_from_chars | |
5120 | (isa, insnbuf, (unsigned char *) frag->fr_literal, 0); | |
5121 | fmt = xtensa_format_decode (isa, insnbuf); | |
5122 | op_size = xtensa_format_length (isa, fmt); | |
5123 | frag_addr = frag->fr_address % xtensa_fetch_width; | |
3739860c | 5124 | |
3c83b96e SA |
5125 | if (frag_addr + op_size > xtensa_fetch_width) |
5126 | as_warn_where (frag->fr_file, frag->fr_line, | |
5127 | _("unaligned loop: %d bytes at 0x%lx"), | |
5128 | op_size, (long) frag->fr_address); | |
5129 | } | |
43cd72b9 BW |
5130 | } |
5131 | frag = frag->fr_next; | |
5132 | } | |
5133 | xtensa_insnbuf_free (isa, insnbuf); | |
5134 | } | |
5135 | } | |
5136 | ||
5137 | ||
30f725a1 BW |
5138 | static int |
5139 | xg_apply_fix_value (fixS *fixP, valueT val) | |
43cd72b9 BW |
5140 | { |
5141 | xtensa_isa isa = xtensa_default_isa; | |
5142 | static xtensa_insnbuf insnbuf = NULL; | |
5143 | static xtensa_insnbuf slotbuf = NULL; | |
5144 | xtensa_format fmt; | |
5145 | int slot; | |
5146 | bfd_boolean alt_reloc; | |
5147 | xtensa_opcode opcode; | |
5148 | char *const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where; | |
5149 | ||
1b6e95c2 BW |
5150 | if (decode_reloc (fixP->fx_r_type, &slot, &alt_reloc) |
5151 | || alt_reloc) | |
43cd72b9 BW |
5152 | as_fatal (_("unexpected fix")); |
5153 | ||
5154 | if (!insnbuf) | |
5155 | { | |
5156 | insnbuf = xtensa_insnbuf_alloc (isa); | |
5157 | slotbuf = xtensa_insnbuf_alloc (isa); | |
5158 | } | |
5159 | ||
d77b99c9 | 5160 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) fixpos, 0); |
43cd72b9 BW |
5161 | fmt = xtensa_format_decode (isa, insnbuf); |
5162 | if (fmt == XTENSA_UNDEFINED) | |
5163 | as_fatal (_("undecodable fix")); | |
5164 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
5165 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
5166 | if (opcode == XTENSA_UNDEFINED) | |
5167 | as_fatal (_("undecodable fix")); | |
5168 | ||
5169 | /* CONST16 immediates are not PC-relative, despite the fact that we | |
5170 | reuse the normal PC-relative operand relocations for the low part | |
30f725a1 | 5171 | of a CONST16 operand. */ |
43cd72b9 | 5172 | if (opcode == xtensa_const16_opcode) |
30f725a1 | 5173 | return 0; |
43cd72b9 BW |
5174 | |
5175 | xtensa_insnbuf_set_operand (slotbuf, fmt, slot, opcode, | |
5176 | get_relaxable_immed (opcode), val, | |
5177 | fixP->fx_file, fixP->fx_line); | |
5178 | ||
5179 | xtensa_format_set_slot (isa, fmt, slot, insnbuf, slotbuf); | |
d77b99c9 | 5180 | xtensa_insnbuf_to_chars (isa, insnbuf, (unsigned char *) fixpos, 0); |
30f725a1 BW |
5181 | |
5182 | return 1; | |
43cd72b9 BW |
5183 | } |
5184 | ||
e0001a05 NC |
5185 | \f |
5186 | /* External Functions and Other GAS Hooks. */ | |
5187 | ||
5188 | const char * | |
7fa3d080 | 5189 | xtensa_target_format (void) |
e0001a05 NC |
5190 | { |
5191 | return (target_big_endian ? "elf32-xtensa-be" : "elf32-xtensa-le"); | |
5192 | } | |
5193 | ||
5194 | ||
5195 | void | |
7fa3d080 | 5196 | xtensa_file_arch_init (bfd *abfd) |
e0001a05 NC |
5197 | { |
5198 | bfd_set_private_flags (abfd, 0x100 | 0x200); | |
5199 | } | |
5200 | ||
5201 | ||
5202 | void | |
7fa3d080 | 5203 | md_number_to_chars (char *buf, valueT val, int n) |
e0001a05 NC |
5204 | { |
5205 | if (target_big_endian) | |
5206 | number_to_chars_bigendian (buf, val, n); | |
5207 | else | |
5208 | number_to_chars_littleendian (buf, val, n); | |
5209 | } | |
5210 | ||
f7e16c2a MF |
5211 | static void |
5212 | xg_init_global_config (void) | |
5213 | { | |
5214 | target_big_endian = XCHAL_HAVE_BE; | |
5215 | ||
5216 | density_supported = XCHAL_HAVE_DENSITY; | |
5217 | absolute_literals_supported = XSHAL_USE_ABSOLUTE_LITERALS; | |
5218 | xtensa_fetch_width = XCHAL_INST_FETCH_WIDTH; | |
5219 | ||
5220 | directive_state[directive_density] = XCHAL_HAVE_DENSITY; | |
5221 | directive_state[directive_absolute_literals] = XSHAL_USE_ABSOLUTE_LITERALS; | |
5222 | } | |
5223 | ||
5224 | void | |
5225 | xtensa_init (int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) | |
5226 | { | |
5227 | xg_init_global_config (); | |
5228 | } | |
e0001a05 NC |
5229 | |
5230 | /* This function is called once, at assembler startup time. It should | |
5231 | set up all the tables, etc. that the MD part of the assembler will | |
5232 | need. */ | |
5233 | ||
5234 | void | |
7fa3d080 | 5235 | md_begin (void) |
e0001a05 NC |
5236 | { |
5237 | segT current_section = now_seg; | |
5238 | int current_subsec = now_subseg; | |
5239 | xtensa_isa isa; | |
62af60e2 | 5240 | int i; |
e0001a05 | 5241 | |
43cd72b9 | 5242 | xtensa_default_isa = xtensa_isa_init (0, 0); |
e0001a05 | 5243 | isa = xtensa_default_isa; |
e0001a05 | 5244 | |
43cd72b9 BW |
5245 | linkrelax = 1; |
5246 | ||
74869ac7 | 5247 | /* Set up the literal sections. */ |
e0001a05 | 5248 | memset (&default_lit_sections, 0, sizeof (default_lit_sections)); |
e0001a05 NC |
5249 | |
5250 | subseg_set (current_section, current_subsec); | |
5251 | ||
5252 | xtensa_addi_opcode = xtensa_opcode_lookup (isa, "addi"); | |
5253 | xtensa_addmi_opcode = xtensa_opcode_lookup (isa, "addmi"); | |
5254 | xtensa_call0_opcode = xtensa_opcode_lookup (isa, "call0"); | |
5255 | xtensa_call4_opcode = xtensa_opcode_lookup (isa, "call4"); | |
5256 | xtensa_call8_opcode = xtensa_opcode_lookup (isa, "call8"); | |
5257 | xtensa_call12_opcode = xtensa_opcode_lookup (isa, "call12"); | |
5258 | xtensa_callx0_opcode = xtensa_opcode_lookup (isa, "callx0"); | |
5259 | xtensa_callx4_opcode = xtensa_opcode_lookup (isa, "callx4"); | |
5260 | xtensa_callx8_opcode = xtensa_opcode_lookup (isa, "callx8"); | |
5261 | xtensa_callx12_opcode = xtensa_opcode_lookup (isa, "callx12"); | |
43cd72b9 | 5262 | xtensa_const16_opcode = xtensa_opcode_lookup (isa, "const16"); |
e0001a05 | 5263 | xtensa_entry_opcode = xtensa_opcode_lookup (isa, "entry"); |
d12f9798 | 5264 | xtensa_extui_opcode = xtensa_opcode_lookup (isa, "extui"); |
43cd72b9 BW |
5265 | xtensa_movi_opcode = xtensa_opcode_lookup (isa, "movi"); |
5266 | xtensa_movi_n_opcode = xtensa_opcode_lookup (isa, "movi.n"); | |
e0001a05 | 5267 | xtensa_isync_opcode = xtensa_opcode_lookup (isa, "isync"); |
19e8f41a | 5268 | xtensa_j_opcode = xtensa_opcode_lookup (isa, "j"); |
e0001a05 | 5269 | xtensa_jx_opcode = xtensa_opcode_lookup (isa, "jx"); |
43cd72b9 | 5270 | xtensa_l32r_opcode = xtensa_opcode_lookup (isa, "l32r"); |
e0001a05 NC |
5271 | xtensa_loop_opcode = xtensa_opcode_lookup (isa, "loop"); |
5272 | xtensa_loopnez_opcode = xtensa_opcode_lookup (isa, "loopnez"); | |
5273 | xtensa_loopgtz_opcode = xtensa_opcode_lookup (isa, "loopgtz"); | |
43cd72b9 | 5274 | xtensa_nop_opcode = xtensa_opcode_lookup (isa, "nop"); |
e0001a05 NC |
5275 | xtensa_nop_n_opcode = xtensa_opcode_lookup (isa, "nop.n"); |
5276 | xtensa_or_opcode = xtensa_opcode_lookup (isa, "or"); | |
5277 | xtensa_ret_opcode = xtensa_opcode_lookup (isa, "ret"); | |
5278 | xtensa_ret_n_opcode = xtensa_opcode_lookup (isa, "ret.n"); | |
5279 | xtensa_retw_opcode = xtensa_opcode_lookup (isa, "retw"); | |
5280 | xtensa_retw_n_opcode = xtensa_opcode_lookup (isa, "retw.n"); | |
43cd72b9 | 5281 | xtensa_rsr_lcount_opcode = xtensa_opcode_lookup (isa, "rsr.lcount"); |
e0001a05 | 5282 | xtensa_waiti_opcode = xtensa_opcode_lookup (isa, "waiti"); |
43cd72b9 | 5283 | |
3739860c | 5284 | for (i = 0; i < xtensa_isa_num_formats (isa); i++) |
62af60e2 SA |
5285 | { |
5286 | int format_slots = xtensa_format_num_slots (isa, i); | |
5287 | if (format_slots > config_max_slots) | |
5288 | config_max_slots = format_slots; | |
5289 | } | |
5290 | ||
5291 | xg_init_vinsn (&cur_vinsn); | |
5292 | ||
77cba8a3 BW |
5293 | xtensa_num_pipe_stages = xtensa_isa_num_pipe_stages (isa); |
5294 | ||
43cd72b9 BW |
5295 | init_op_placement_info_table (); |
5296 | ||
5297 | /* Set up the assembly state. */ | |
5298 | if (!frag_now->tc_frag_data.is_assembly_state_set) | |
5299 | xtensa_set_frag_assembly_state (frag_now); | |
5300 | } | |
5301 | ||
5302 | ||
5303 | /* TC_INIT_FIX_DATA hook */ | |
5304 | ||
5305 | void | |
7fa3d080 | 5306 | xtensa_init_fix_data (fixS *x) |
43cd72b9 BW |
5307 | { |
5308 | x->tc_fix_data.slot = 0; | |
5309 | x->tc_fix_data.X_add_symbol = NULL; | |
5310 | x->tc_fix_data.X_add_number = 0; | |
e0001a05 NC |
5311 | } |
5312 | ||
5313 | ||
5314 | /* tc_frob_label hook */ | |
5315 | ||
5316 | void | |
7fa3d080 | 5317 | xtensa_frob_label (symbolS *sym) |
e0001a05 | 5318 | { |
3ea38ac2 BW |
5319 | float freq; |
5320 | ||
5321 | if (cur_vinsn.inside_bundle) | |
5322 | { | |
5323 | as_bad (_("labels are not valid inside bundles")); | |
5324 | return; | |
5325 | } | |
5326 | ||
5327 | freq = get_subseg_target_freq (now_seg, now_subseg); | |
7b1cc377 | 5328 | |
43cd72b9 BW |
5329 | /* Since the label was already attached to a frag associated with the |
5330 | previous basic block, it now needs to be reset to the current frag. */ | |
5331 | symbol_set_frag (sym, frag_now); | |
5332 | S_SET_VALUE (sym, (valueT) frag_now_fix ()); | |
5333 | ||
82e7541d BW |
5334 | if (generating_literals) |
5335 | xtensa_add_literal_sym (sym); | |
5336 | else | |
5337 | xtensa_add_insn_label (sym); | |
5338 | ||
7b1cc377 BW |
5339 | if (symbol_get_tc (sym)->is_loop_target) |
5340 | { | |
5341 | if ((get_last_insn_flags (now_seg, now_subseg) | |
e0001a05 | 5342 | & FLAG_IS_BAD_LOOPEND) != 0) |
7b1cc377 BW |
5343 | as_bad (_("invalid last instruction for a zero-overhead loop")); |
5344 | ||
5345 | xtensa_set_frag_assembly_state (frag_now); | |
5346 | frag_var (rs_machine_dependent, 4, 4, RELAX_LOOP_END, | |
5347 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
5348 | ||
5349 | xtensa_set_frag_assembly_state (frag_now); | |
c3ea6048 | 5350 | xtensa_move_labels (frag_now, 0); |
07a53e5c | 5351 | } |
e0001a05 NC |
5352 | |
5353 | /* No target aligning in the absolute section. */ | |
61846f28 | 5354 | if (now_seg != absolute_section |
61846f28 | 5355 | && !is_unaligned_label (sym) |
43cd72b9 BW |
5356 | && !generating_literals) |
5357 | { | |
43cd72b9 BW |
5358 | xtensa_set_frag_assembly_state (frag_now); |
5359 | ||
b7afdeef SA |
5360 | if (do_align_targets ()) |
5361 | frag_var (rs_machine_dependent, 0, (int) freq, | |
5362 | RELAX_DESIRE_ALIGN_IF_TARGET, frag_now->fr_symbol, | |
5363 | frag_now->fr_offset, NULL); | |
5364 | else | |
5365 | frag_var (rs_fill, 0, 0, frag_now->fr_subtype, | |
5366 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
43cd72b9 | 5367 | xtensa_set_frag_assembly_state (frag_now); |
c3ea6048 | 5368 | xtensa_move_labels (frag_now, 0); |
43cd72b9 BW |
5369 | } |
5370 | ||
5371 | /* We need to mark the following properties even if we aren't aligning. */ | |
5372 | ||
5373 | /* If the label is already known to be a branch target, i.e., a | |
5374 | forward branch, mark the frag accordingly. Backward branches | |
5375 | are handled by xg_add_branch_and_loop_targets. */ | |
5376 | if (symbol_get_tc (sym)->is_branch_target) | |
5377 | symbol_get_frag (sym)->tc_frag_data.is_branch_target = TRUE; | |
5378 | ||
5379 | /* Loops only go forward, so they can be identified here. */ | |
5380 | if (symbol_get_tc (sym)->is_loop_target) | |
5381 | symbol_get_frag (sym)->tc_frag_data.is_loop_target = TRUE; | |
07a53e5c RH |
5382 | |
5383 | dwarf2_emit_label (sym); | |
43cd72b9 BW |
5384 | } |
5385 | ||
5386 | ||
5387 | /* tc_unrecognized_line hook */ | |
5388 | ||
5389 | int | |
7fa3d080 | 5390 | xtensa_unrecognized_line (int ch) |
43cd72b9 BW |
5391 | { |
5392 | switch (ch) | |
5393 | { | |
5394 | case '{' : | |
5395 | if (cur_vinsn.inside_bundle == 0) | |
5396 | { | |
5397 | /* PR8110: Cannot emit line number info inside a FLIX bundle | |
5398 | when using --gstabs. Temporarily disable debug info. */ | |
5399 | generate_lineno_debug (); | |
5400 | if (debug_type == DEBUG_STABS) | |
5401 | { | |
5402 | xt_saved_debug_type = debug_type; | |
5403 | debug_type = DEBUG_NONE; | |
5404 | } | |
82e7541d | 5405 | |
43cd72b9 BW |
5406 | cur_vinsn.inside_bundle = 1; |
5407 | } | |
5408 | else | |
5409 | { | |
5410 | as_bad (_("extra opening brace")); | |
5411 | return 0; | |
5412 | } | |
5413 | break; | |
82e7541d | 5414 | |
43cd72b9 BW |
5415 | case '}' : |
5416 | if (cur_vinsn.inside_bundle) | |
5417 | finish_vinsn (&cur_vinsn); | |
5418 | else | |
5419 | { | |
5420 | as_bad (_("extra closing brace")); | |
5421 | return 0; | |
5422 | } | |
5423 | break; | |
5424 | default: | |
5425 | as_bad (_("syntax error")); | |
5426 | return 0; | |
e0001a05 | 5427 | } |
43cd72b9 | 5428 | return 1; |
e0001a05 NC |
5429 | } |
5430 | ||
5431 | ||
5432 | /* md_flush_pending_output hook */ | |
5433 | ||
5434 | void | |
7fa3d080 | 5435 | xtensa_flush_pending_output (void) |
e0001a05 | 5436 | { |
a3582eee BW |
5437 | /* This line fixes a bug where automatically generated gstabs info |
5438 | separates a function label from its entry instruction, ending up | |
5439 | with the literal position between the function label and the entry | |
5440 | instruction and crashing code. It only happens with --gstabs and | |
5441 | --text-section-literals, and when several other obscure relaxation | |
5442 | conditions are met. */ | |
5443 | if (outputting_stabs_line_debug) | |
5444 | return; | |
5445 | ||
43cd72b9 BW |
5446 | if (cur_vinsn.inside_bundle) |
5447 | as_bad (_("missing closing brace")); | |
5448 | ||
e0001a05 NC |
5449 | /* If there is a non-zero instruction fragment, close it. */ |
5450 | if (frag_now_fix () != 0 && frag_now->tc_frag_data.is_insn) | |
5451 | { | |
5452 | frag_wane (frag_now); | |
5453 | frag_new (0); | |
43cd72b9 | 5454 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
5455 | } |
5456 | frag_now->tc_frag_data.is_insn = FALSE; | |
82e7541d BW |
5457 | |
5458 | xtensa_clear_insn_labels (); | |
e0001a05 NC |
5459 | } |
5460 | ||
5461 | ||
43cd72b9 BW |
5462 | /* We had an error while parsing an instruction. The string might look |
5463 | like this: "insn arg1, arg2 }". If so, we need to see the closing | |
5464 | brace and reset some fields. Otherwise, the vinsn never gets closed | |
5465 | and the num_slots field will grow past the end of the array of slots, | |
5466 | and bad things happen. */ | |
5467 | ||
5468 | static void | |
7fa3d080 | 5469 | error_reset_cur_vinsn (void) |
43cd72b9 BW |
5470 | { |
5471 | if (cur_vinsn.inside_bundle) | |
5472 | { | |
5473 | if (*input_line_pointer == '}' | |
5474 | || *(input_line_pointer - 1) == '}' | |
5475 | || *(input_line_pointer - 2) == '}') | |
5476 | xg_clear_vinsn (&cur_vinsn); | |
5477 | } | |
5478 | } | |
5479 | ||
5480 | ||
e0001a05 | 5481 | void |
7fa3d080 | 5482 | md_assemble (char *str) |
e0001a05 NC |
5483 | { |
5484 | xtensa_isa isa = xtensa_default_isa; | |
b224e962 | 5485 | char *opname; |
e0001a05 NC |
5486 | unsigned opnamelen; |
5487 | bfd_boolean has_underbar = FALSE; | |
43cd72b9 | 5488 | char *arg_strings[MAX_INSN_ARGS]; |
e0001a05 | 5489 | int num_args; |
e0001a05 | 5490 | TInsn orig_insn; /* Original instruction from the input. */ |
e0001a05 | 5491 | |
e0001a05 NC |
5492 | tinsn_init (&orig_insn); |
5493 | ||
5494 | /* Split off the opcode. */ | |
5495 | opnamelen = strspn (str, "abcdefghijklmnopqrstuvwxyz_/0123456789."); | |
4ec9d7d5 | 5496 | opname = xstrndup (str, opnamelen); |
e0001a05 NC |
5497 | |
5498 | num_args = tokenize_arguments (arg_strings, str + opnamelen); | |
5499 | if (num_args == -1) | |
5500 | { | |
5501 | as_bad (_("syntax error")); | |
5502 | return; | |
5503 | } | |
5504 | ||
5505 | if (xg_translate_idioms (&opname, &num_args, arg_strings)) | |
5506 | return; | |
5507 | ||
5508 | /* Check for an underbar prefix. */ | |
5509 | if (*opname == '_') | |
5510 | { | |
5511 | has_underbar = TRUE; | |
5512 | opname += 1; | |
5513 | } | |
5514 | ||
5515 | orig_insn.insn_type = ITYPE_INSN; | |
5516 | orig_insn.ntok = 0; | |
43cd72b9 | 5517 | orig_insn.is_specific_opcode = (has_underbar || !use_transform ()); |
e0001a05 | 5518 | orig_insn.opcode = xtensa_opcode_lookup (isa, opname); |
28dbbc02 | 5519 | |
2b0f3761 | 5520 | /* Special case: Check for "CALLXn.TLS" pseudo op. If found, grab its |
28dbbc02 BW |
5521 | extra argument and set the opcode to "CALLXn". */ |
5522 | if (orig_insn.opcode == XTENSA_UNDEFINED | |
5523 | && strncasecmp (opname, "callx", 5) == 0) | |
5524 | { | |
5525 | unsigned long window_size; | |
5526 | char *suffix; | |
5527 | ||
5528 | window_size = strtoul (opname + 5, &suffix, 10); | |
5529 | if (suffix != opname + 5 | |
5530 | && (window_size == 0 | |
5531 | || window_size == 4 | |
5532 | || window_size == 8 | |
5533 | || window_size == 12) | |
5534 | && strcasecmp (suffix, ".tls") == 0) | |
5535 | { | |
5536 | switch (window_size) | |
5537 | { | |
5538 | case 0: orig_insn.opcode = xtensa_callx0_opcode; break; | |
5539 | case 4: orig_insn.opcode = xtensa_callx4_opcode; break; | |
5540 | case 8: orig_insn.opcode = xtensa_callx8_opcode; break; | |
5541 | case 12: orig_insn.opcode = xtensa_callx12_opcode; break; | |
5542 | } | |
5543 | ||
5544 | if (num_args != 2) | |
5545 | as_bad (_("wrong number of operands for '%s'"), opname); | |
5546 | else | |
5547 | { | |
5548 | bfd_reloc_code_real_type reloc; | |
5549 | char *old_input_line_pointer; | |
19e8f41a | 5550 | expressionS *tok = &orig_insn.extra_arg; |
28dbbc02 BW |
5551 | |
5552 | old_input_line_pointer = input_line_pointer; | |
5553 | input_line_pointer = arg_strings[num_args - 1]; | |
5554 | ||
87975d2a | 5555 | expression (tok); |
28dbbc02 BW |
5556 | if (tok->X_op == O_symbol |
5557 | && ((reloc = xtensa_elf_suffix (&input_line_pointer, tok)) | |
5558 | == BFD_RELOC_XTENSA_TLS_CALL)) | |
5559 | tok->X_op = map_suffix_reloc_to_operator (reloc); | |
5560 | else | |
5561 | as_bad (_("bad relocation expression for '%s'"), opname); | |
5562 | ||
5563 | input_line_pointer = old_input_line_pointer; | |
5564 | num_args -= 1; | |
5565 | } | |
5566 | } | |
5567 | } | |
5568 | ||
2b0f3761 | 5569 | /* Special case: Check for "j.l" pseudo op. */ |
19e8f41a BW |
5570 | if (orig_insn.opcode == XTENSA_UNDEFINED |
5571 | && strncasecmp (opname, "j.l", 3) == 0) | |
5572 | { | |
5573 | if (num_args != 2) | |
5574 | as_bad (_("wrong number of operands for '%s'"), opname); | |
5575 | else | |
5576 | { | |
5577 | char *old_input_line_pointer; | |
5578 | expressionS *tok = &orig_insn.extra_arg; | |
5579 | ||
5580 | old_input_line_pointer = input_line_pointer; | |
5581 | input_line_pointer = arg_strings[num_args - 1]; | |
5582 | ||
5583 | expression_maybe_register (xtensa_jx_opcode, 0, tok); | |
5584 | input_line_pointer = old_input_line_pointer; | |
5585 | ||
5586 | num_args -= 1; | |
5587 | orig_insn.opcode = xtensa_j_opcode; | |
5588 | } | |
5589 | } | |
5590 | ||
e0001a05 NC |
5591 | if (orig_insn.opcode == XTENSA_UNDEFINED) |
5592 | { | |
43cd72b9 BW |
5593 | xtensa_format fmt = xtensa_format_lookup (isa, opname); |
5594 | if (fmt == XTENSA_UNDEFINED) | |
5595 | { | |
5596 | as_bad (_("unknown opcode or format name '%s'"), opname); | |
5597 | error_reset_cur_vinsn (); | |
5598 | return; | |
5599 | } | |
5600 | if (!cur_vinsn.inside_bundle) | |
5601 | { | |
5602 | as_bad (_("format names only valid inside bundles")); | |
5603 | error_reset_cur_vinsn (); | |
5604 | return; | |
5605 | } | |
5606 | if (cur_vinsn.format != XTENSA_UNDEFINED) | |
5607 | as_warn (_("multiple formats specified for one bundle; using '%s'"), | |
5608 | opname); | |
5609 | cur_vinsn.format = fmt; | |
5610 | free (has_underbar ? opname - 1 : opname); | |
5611 | error_reset_cur_vinsn (); | |
e0001a05 NC |
5612 | return; |
5613 | } | |
5614 | ||
e0001a05 NC |
5615 | /* Parse the arguments. */ |
5616 | if (parse_arguments (&orig_insn, num_args, arg_strings)) | |
5617 | { | |
5618 | as_bad (_("syntax error")); | |
43cd72b9 | 5619 | error_reset_cur_vinsn (); |
e0001a05 NC |
5620 | return; |
5621 | } | |
5622 | ||
5623 | /* Free the opcode and argument strings, now that they've been parsed. */ | |
5624 | free (has_underbar ? opname - 1 : opname); | |
5625 | opname = 0; | |
5626 | while (num_args-- > 0) | |
5627 | free (arg_strings[num_args]); | |
5628 | ||
43cd72b9 BW |
5629 | /* Get expressions for invisible operands. */ |
5630 | if (get_invisible_operands (&orig_insn)) | |
5631 | { | |
5632 | error_reset_cur_vinsn (); | |
5633 | return; | |
5634 | } | |
5635 | ||
e0001a05 NC |
5636 | /* Check for the right number and type of arguments. */ |
5637 | if (tinsn_check_arguments (&orig_insn)) | |
e0001a05 | 5638 | { |
43cd72b9 BW |
5639 | error_reset_cur_vinsn (); |
5640 | return; | |
e0001a05 NC |
5641 | } |
5642 | ||
b224e962 BW |
5643 | /* Record the line number for each TInsn, because a FLIX bundle may be |
5644 | spread across multiple input lines and individual instructions may be | |
5645 | moved around in some cases. */ | |
5646 | orig_insn.loc_directive_seen = dwarf2_loc_directive_seen; | |
5647 | dwarf2_where (&orig_insn.debug_line); | |
5648 | dwarf2_consume_line_info (); | |
c138bc38 | 5649 | |
43cd72b9 BW |
5650 | xg_add_branch_and_loop_targets (&orig_insn); |
5651 | ||
431ad2d0 BW |
5652 | /* Check that immediate value for ENTRY is >= 16. */ |
5653 | if (orig_insn.opcode == xtensa_entry_opcode && orig_insn.ntok >= 3) | |
e0001a05 | 5654 | { |
431ad2d0 BW |
5655 | expressionS *exp = &orig_insn.tok[2]; |
5656 | if (exp->X_op == O_constant && exp->X_add_number < 16) | |
5657 | as_warn (_("entry instruction with stack decrement < 16")); | |
e0001a05 NC |
5658 | } |
5659 | ||
e0001a05 | 5660 | /* Finish it off: |
43cd72b9 BW |
5661 | assemble_tokens (opcode, tok, ntok); |
5662 | expand the tokens from the orig_insn into the | |
5663 | stack of instructions that will not expand | |
e0001a05 | 5664 | unless required at relaxation time. */ |
e0001a05 | 5665 | |
43cd72b9 BW |
5666 | if (!cur_vinsn.inside_bundle) |
5667 | emit_single_op (&orig_insn); | |
5668 | else /* We are inside a bundle. */ | |
e0001a05 | 5669 | { |
43cd72b9 BW |
5670 | cur_vinsn.slots[cur_vinsn.num_slots] = orig_insn; |
5671 | cur_vinsn.num_slots++; | |
5672 | if (*input_line_pointer == '}' | |
5673 | || *(input_line_pointer - 1) == '}' | |
5674 | || *(input_line_pointer - 2) == '}') | |
5675 | finish_vinsn (&cur_vinsn); | |
e0001a05 NC |
5676 | } |
5677 | ||
43cd72b9 BW |
5678 | /* We've just emitted a new instruction so clear the list of labels. */ |
5679 | xtensa_clear_insn_labels (); | |
a82c7d90 DW |
5680 | |
5681 | xtensa_check_frag_count (); | |
e0001a05 NC |
5682 | } |
5683 | ||
5684 | ||
43cd72b9 | 5685 | /* HANDLE_ALIGN hook */ |
e0001a05 | 5686 | |
43cd72b9 BW |
5687 | /* For a .align directive, we mark the previous block with the alignment |
5688 | information. This will be placed in the object file in the | |
5689 | property section corresponding to this section. */ | |
e0001a05 | 5690 | |
43cd72b9 | 5691 | void |
7fa3d080 | 5692 | xtensa_handle_align (fragS *fragP) |
43cd72b9 BW |
5693 | { |
5694 | if (linkrelax | |
b08b5071 | 5695 | && ! fragP->tc_frag_data.is_literal |
43cd72b9 BW |
5696 | && (fragP->fr_type == rs_align |
5697 | || fragP->fr_type == rs_align_code) | |
43cd72b9 BW |
5698 | && fragP->fr_offset > 0 |
5699 | && now_seg != bss_section) | |
e0001a05 | 5700 | { |
43cd72b9 BW |
5701 | fragP->tc_frag_data.is_align = TRUE; |
5702 | fragP->tc_frag_data.alignment = fragP->fr_offset; | |
e0001a05 NC |
5703 | } |
5704 | ||
43cd72b9 | 5705 | if (fragP->fr_type == rs_align_test) |
e0001a05 | 5706 | { |
43cd72b9 BW |
5707 | int count; |
5708 | count = fragP->fr_next->fr_address - fragP->fr_address - fragP->fr_fix; | |
5709 | if (count != 0) | |
c138bc38 | 5710 | as_bad_where (fragP->fr_file, fragP->fr_line, |
43cd72b9 | 5711 | _("unaligned entry instruction")); |
e0001a05 | 5712 | } |
99ded152 BW |
5713 | |
5714 | if (linkrelax && fragP->fr_type == rs_org) | |
5715 | fragP->fr_subtype = RELAX_ORG; | |
e0001a05 | 5716 | } |
43cd72b9 | 5717 | |
e0001a05 NC |
5718 | |
5719 | /* TC_FRAG_INIT hook */ | |
5720 | ||
5721 | void | |
7fa3d080 | 5722 | xtensa_frag_init (fragS *frag) |
e0001a05 | 5723 | { |
43cd72b9 | 5724 | xtensa_set_frag_assembly_state (frag); |
e0001a05 NC |
5725 | } |
5726 | ||
5727 | ||
5728 | symbolS * | |
7fa3d080 | 5729 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
e0001a05 NC |
5730 | { |
5731 | return NULL; | |
5732 | } | |
5733 | ||
5734 | ||
5735 | /* Round up a section size to the appropriate boundary. */ | |
5736 | ||
5737 | valueT | |
7fa3d080 | 5738 | md_section_align (segT segment ATTRIBUTE_UNUSED, valueT size) |
e0001a05 NC |
5739 | { |
5740 | return size; /* Byte alignment is fine. */ | |
5741 | } | |
5742 | ||
5743 | ||
5744 | long | |
7fa3d080 | 5745 | md_pcrel_from (fixS *fixP) |
e0001a05 NC |
5746 | { |
5747 | char *insn_p; | |
5748 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 5749 | static xtensa_insnbuf slotbuf = NULL; |
e0001a05 | 5750 | int opnum; |
43cd72b9 | 5751 | uint32 opnd_value; |
e0001a05 | 5752 | xtensa_opcode opcode; |
43cd72b9 BW |
5753 | xtensa_format fmt; |
5754 | int slot; | |
e0001a05 NC |
5755 | xtensa_isa isa = xtensa_default_isa; |
5756 | valueT addr = fixP->fx_where + fixP->fx_frag->fr_address; | |
43cd72b9 | 5757 | bfd_boolean alt_reloc; |
e0001a05 | 5758 | |
e0001a05 | 5759 | if (fixP->fx_r_type == BFD_RELOC_XTENSA_ASM_EXPAND) |
30f725a1 | 5760 | return 0; |
e0001a05 | 5761 | |
1bbb5f21 BW |
5762 | if (fixP->fx_r_type == BFD_RELOC_32_PCREL) |
5763 | return addr; | |
5764 | ||
e0001a05 | 5765 | if (!insnbuf) |
43cd72b9 BW |
5766 | { |
5767 | insnbuf = xtensa_insnbuf_alloc (isa); | |
5768 | slotbuf = xtensa_insnbuf_alloc (isa); | |
5769 | } | |
e0001a05 NC |
5770 | |
5771 | insn_p = &fixP->fx_frag->fr_literal[fixP->fx_where]; | |
d77b99c9 | 5772 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) insn_p, 0); |
43cd72b9 BW |
5773 | fmt = xtensa_format_decode (isa, insnbuf); |
5774 | ||
5775 | if (fmt == XTENSA_UNDEFINED) | |
5776 | as_fatal (_("bad instruction format")); | |
5777 | ||
5778 | if (decode_reloc (fixP->fx_r_type, &slot, &alt_reloc) != 0) | |
5779 | as_fatal (_("invalid relocation")); | |
5780 | ||
5781 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
5782 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
5783 | ||
30f725a1 BW |
5784 | /* Check for "alternate" relocations (operand not specified). None |
5785 | of the current uses for these are really PC-relative. */ | |
43cd72b9 BW |
5786 | if (alt_reloc || opcode == xtensa_const16_opcode) |
5787 | { | |
5788 | if (opcode != xtensa_l32r_opcode | |
5789 | && opcode != xtensa_const16_opcode) | |
5790 | as_fatal (_("invalid relocation for '%s' instruction"), | |
5791 | xtensa_opcode_name (isa, opcode)); | |
30f725a1 | 5792 | return 0; |
e0001a05 NC |
5793 | } |
5794 | ||
43cd72b9 BW |
5795 | opnum = get_relaxable_immed (opcode); |
5796 | opnd_value = 0; | |
5797 | if (xtensa_operand_is_PCrelative (isa, opcode, opnum) != 1 | |
5798 | || xtensa_operand_do_reloc (isa, opcode, opnum, &opnd_value, addr)) | |
e0001a05 NC |
5799 | { |
5800 | as_bad_where (fixP->fx_file, | |
5801 | fixP->fx_line, | |
5802 | _("invalid relocation for operand %d of '%s'"), | |
5803 | opnum, xtensa_opcode_name (isa, opcode)); | |
30f725a1 | 5804 | return 0; |
e0001a05 | 5805 | } |
43cd72b9 BW |
5806 | return 0 - opnd_value; |
5807 | } | |
5808 | ||
5809 | ||
5810 | /* TC_FORCE_RELOCATION hook */ | |
5811 | ||
5812 | int | |
7fa3d080 | 5813 | xtensa_force_relocation (fixS *fix) |
43cd72b9 BW |
5814 | { |
5815 | switch (fix->fx_r_type) | |
30f725a1 BW |
5816 | { |
5817 | case BFD_RELOC_XTENSA_ASM_EXPAND: | |
43cd72b9 BW |
5818 | case BFD_RELOC_XTENSA_SLOT0_ALT: |
5819 | case BFD_RELOC_XTENSA_SLOT1_ALT: | |
5820 | case BFD_RELOC_XTENSA_SLOT2_ALT: | |
5821 | case BFD_RELOC_XTENSA_SLOT3_ALT: | |
5822 | case BFD_RELOC_XTENSA_SLOT4_ALT: | |
5823 | case BFD_RELOC_XTENSA_SLOT5_ALT: | |
5824 | case BFD_RELOC_XTENSA_SLOT6_ALT: | |
5825 | case BFD_RELOC_XTENSA_SLOT7_ALT: | |
5826 | case BFD_RELOC_XTENSA_SLOT8_ALT: | |
5827 | case BFD_RELOC_XTENSA_SLOT9_ALT: | |
5828 | case BFD_RELOC_XTENSA_SLOT10_ALT: | |
5829 | case BFD_RELOC_XTENSA_SLOT11_ALT: | |
5830 | case BFD_RELOC_XTENSA_SLOT12_ALT: | |
5831 | case BFD_RELOC_XTENSA_SLOT13_ALT: | |
5832 | case BFD_RELOC_XTENSA_SLOT14_ALT: | |
43cd72b9 BW |
5833 | return 1; |
5834 | default: | |
5835 | break; | |
e0001a05 NC |
5836 | } |
5837 | ||
43cd72b9 BW |
5838 | if (linkrelax && fix->fx_addsy |
5839 | && relaxable_section (S_GET_SEGMENT (fix->fx_addsy))) | |
5840 | return 1; | |
5841 | ||
5842 | return generic_force_reloc (fix); | |
5843 | } | |
5844 | ||
5845 | ||
30f725a1 BW |
5846 | /* TC_VALIDATE_FIX_SUB hook */ |
5847 | ||
5848 | int | |
5849 | xtensa_validate_fix_sub (fixS *fix) | |
5850 | { | |
5851 | segT add_symbol_segment, sub_symbol_segment; | |
5852 | ||
5853 | /* The difference of two symbols should be resolved by the assembler when | |
5854 | linkrelax is not set. If the linker may relax the section containing | |
5855 | the symbols, then an Xtensa DIFF relocation must be generated so that | |
5856 | the linker knows to adjust the difference value. */ | |
5857 | if (!linkrelax || fix->fx_addsy == NULL) | |
5858 | return 0; | |
5859 | ||
5860 | /* Make sure both symbols are in the same segment, and that segment is | |
5861 | "normal" and relaxable. If the segment is not "normal", then the | |
5862 | fix is not valid. If the segment is not "relaxable", then the fix | |
5863 | should have been handled earlier. */ | |
5864 | add_symbol_segment = S_GET_SEGMENT (fix->fx_addsy); | |
5865 | if (! SEG_NORMAL (add_symbol_segment) || | |
5866 | ! relaxable_section (add_symbol_segment)) | |
5867 | return 0; | |
5868 | sub_symbol_segment = S_GET_SEGMENT (fix->fx_subsy); | |
5869 | return (sub_symbol_segment == add_symbol_segment); | |
5870 | } | |
5871 | ||
5872 | ||
43cd72b9 BW |
5873 | /* NO_PSEUDO_DOT hook */ |
5874 | ||
5875 | /* This function has nothing to do with pseudo dots, but this is the | |
5876 | nearest macro to where the check needs to take place. FIXME: This | |
5877 | seems wrong. */ | |
5878 | ||
5879 | bfd_boolean | |
7fa3d080 | 5880 | xtensa_check_inside_bundle (void) |
43cd72b9 BW |
5881 | { |
5882 | if (cur_vinsn.inside_bundle && input_line_pointer[-1] == '.') | |
5883 | as_bad (_("directives are not valid inside bundles")); | |
5884 | ||
5885 | /* This function must always return FALSE because it is called via a | |
5886 | macro that has nothing to do with bundling. */ | |
5887 | return FALSE; | |
e0001a05 NC |
5888 | } |
5889 | ||
5890 | ||
43cd72b9 | 5891 | /* md_elf_section_change_hook */ |
e0001a05 NC |
5892 | |
5893 | void | |
7fa3d080 | 5894 | xtensa_elf_section_change_hook (void) |
e0001a05 | 5895 | { |
43cd72b9 BW |
5896 | /* Set up the assembly state. */ |
5897 | if (!frag_now->tc_frag_data.is_assembly_state_set) | |
5898 | xtensa_set_frag_assembly_state (frag_now); | |
e0001a05 NC |
5899 | } |
5900 | ||
5901 | ||
5902 | /* tc_fix_adjustable hook */ | |
5903 | ||
5904 | bfd_boolean | |
7fa3d080 | 5905 | xtensa_fix_adjustable (fixS *fixP) |
e0001a05 NC |
5906 | { |
5907 | /* We need the symbol name for the VTABLE entries. */ | |
5908 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
5909 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
5910 | return 0; | |
5911 | ||
5912 | return 1; | |
5913 | } | |
5914 | ||
5915 | ||
6a7eedfe BW |
5916 | /* tc_symbol_new_hook */ |
5917 | ||
5918 | symbolS *expr_symbols = NULL; | |
5919 | ||
3739860c | 5920 | void |
6a7eedfe BW |
5921 | xtensa_symbol_new_hook (symbolS *sym) |
5922 | { | |
fb227da0 | 5923 | if (is_leb128_expr && S_GET_SEGMENT (sym) == expr_section) |
6a7eedfe BW |
5924 | { |
5925 | symbol_get_tc (sym)->next_expr_symbol = expr_symbols; | |
5926 | expr_symbols = sym; | |
5927 | } | |
5928 | } | |
5929 | ||
5930 | ||
e0001a05 | 5931 | void |
55cf6793 | 5932 | md_apply_fix (fixS *fixP, valueT *valP, segT seg) |
e0001a05 | 5933 | { |
30f725a1 | 5934 | char *const fixpos = fixP->fx_frag->fr_literal + fixP->fx_where; |
d47d412e | 5935 | valueT val = 0; |
30f725a1 | 5936 | |
e7da6241 BW |
5937 | /* Subtracted symbols are only allowed for a few relocation types, and |
5938 | unless linkrelax is enabled, they should not make it to this point. */ | |
5939 | if (fixP->fx_subsy && !(linkrelax && (fixP->fx_r_type == BFD_RELOC_32 | |
5940 | || fixP->fx_r_type == BFD_RELOC_16 | |
5941 | || fixP->fx_r_type == BFD_RELOC_8))) | |
5942 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
5943 | ||
30f725a1 | 5944 | switch (fixP->fx_r_type) |
e0001a05 | 5945 | { |
1bbb5f21 | 5946 | case BFD_RELOC_32_PCREL: |
30f725a1 BW |
5947 | case BFD_RELOC_32: |
5948 | case BFD_RELOC_16: | |
5949 | case BFD_RELOC_8: | |
e7da6241 | 5950 | if (fixP->fx_subsy) |
30f725a1 BW |
5951 | { |
5952 | switch (fixP->fx_r_type) | |
5953 | { | |
5954 | case BFD_RELOC_8: | |
5955 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF8; | |
ea173078 | 5956 | fixP->fx_signed = 0; |
30f725a1 BW |
5957 | break; |
5958 | case BFD_RELOC_16: | |
5959 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF16; | |
ea173078 | 5960 | fixP->fx_signed = 0; |
30f725a1 BW |
5961 | break; |
5962 | case BFD_RELOC_32: | |
5963 | fixP->fx_r_type = BFD_RELOC_XTENSA_DIFF32; | |
ea173078 | 5964 | fixP->fx_signed = 0; |
30f725a1 BW |
5965 | break; |
5966 | default: | |
5967 | break; | |
5968 | } | |
e0001a05 | 5969 | |
30f725a1 BW |
5970 | val = (S_GET_VALUE (fixP->fx_addsy) + fixP->fx_offset |
5971 | - S_GET_VALUE (fixP->fx_subsy)); | |
5972 | ||
5973 | /* The difference value gets written out, and the DIFF reloc | |
5974 | identifies the address of the subtracted symbol (i.e., the one | |
5975 | with the lowest address). */ | |
5976 | *valP = val; | |
5977 | fixP->fx_offset -= val; | |
5978 | fixP->fx_subsy = NULL; | |
5979 | } | |
5980 | else if (! fixP->fx_addsy) | |
e0001a05 | 5981 | { |
30f725a1 | 5982 | val = *valP; |
e0001a05 | 5983 | fixP->fx_done = 1; |
30f725a1 | 5984 | } |
d47d412e BW |
5985 | /* fall through */ |
5986 | ||
5987 | case BFD_RELOC_XTENSA_PLT: | |
30f725a1 BW |
5988 | md_number_to_chars (fixpos, val, fixP->fx_size); |
5989 | fixP->fx_no_overflow = 0; /* Use the standard overflow check. */ | |
5990 | break; | |
e0001a05 | 5991 | |
28dbbc02 BW |
5992 | case BFD_RELOC_XTENSA_TLSDESC_FN: |
5993 | case BFD_RELOC_XTENSA_TLSDESC_ARG: | |
5994 | case BFD_RELOC_XTENSA_TLS_TPOFF: | |
5995 | case BFD_RELOC_XTENSA_TLS_DTPOFF: | |
5996 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
5997 | md_number_to_chars (fixpos, 0, fixP->fx_size); | |
5998 | fixP->fx_no_overflow = 0; /* Use the standard overflow check. */ | |
5999 | break; | |
6000 | ||
30f725a1 BW |
6001 | case BFD_RELOC_XTENSA_SLOT0_OP: |
6002 | case BFD_RELOC_XTENSA_SLOT1_OP: | |
6003 | case BFD_RELOC_XTENSA_SLOT2_OP: | |
6004 | case BFD_RELOC_XTENSA_SLOT3_OP: | |
6005 | case BFD_RELOC_XTENSA_SLOT4_OP: | |
6006 | case BFD_RELOC_XTENSA_SLOT5_OP: | |
6007 | case BFD_RELOC_XTENSA_SLOT6_OP: | |
6008 | case BFD_RELOC_XTENSA_SLOT7_OP: | |
6009 | case BFD_RELOC_XTENSA_SLOT8_OP: | |
6010 | case BFD_RELOC_XTENSA_SLOT9_OP: | |
6011 | case BFD_RELOC_XTENSA_SLOT10_OP: | |
6012 | case BFD_RELOC_XTENSA_SLOT11_OP: | |
6013 | case BFD_RELOC_XTENSA_SLOT12_OP: | |
6014 | case BFD_RELOC_XTENSA_SLOT13_OP: | |
6015 | case BFD_RELOC_XTENSA_SLOT14_OP: | |
6016 | if (linkrelax) | |
6017 | { | |
6018 | /* Write the tentative value of a PC-relative relocation to a | |
6019 | local symbol into the instruction. The value will be ignored | |
6020 | by the linker, and it makes the object file disassembly | |
6021 | readable when all branch targets are encoded in relocations. */ | |
6022 | ||
9c2799c2 | 6023 | gas_assert (fixP->fx_addsy); |
20ee54e8 | 6024 | if (S_GET_SEGMENT (fixP->fx_addsy) == seg |
30f725a1 BW |
6025 | && !S_FORCE_RELOC (fixP->fx_addsy, 1)) |
6026 | { | |
6027 | val = (S_GET_VALUE (fixP->fx_addsy) + fixP->fx_offset | |
6028 | - md_pcrel_from (fixP)); | |
6029 | (void) xg_apply_fix_value (fixP, val); | |
6030 | } | |
6031 | } | |
6032 | else if (! fixP->fx_addsy) | |
6033 | { | |
6034 | val = *valP; | |
6035 | if (xg_apply_fix_value (fixP, val)) | |
6036 | fixP->fx_done = 1; | |
6037 | } | |
6038 | break; | |
e0001a05 | 6039 | |
30f725a1 | 6040 | case BFD_RELOC_XTENSA_ASM_EXPAND: |
28dbbc02 BW |
6041 | case BFD_RELOC_XTENSA_TLS_FUNC: |
6042 | case BFD_RELOC_XTENSA_TLS_ARG: | |
6043 | case BFD_RELOC_XTENSA_TLS_CALL: | |
30f725a1 BW |
6044 | case BFD_RELOC_XTENSA_SLOT0_ALT: |
6045 | case BFD_RELOC_XTENSA_SLOT1_ALT: | |
6046 | case BFD_RELOC_XTENSA_SLOT2_ALT: | |
6047 | case BFD_RELOC_XTENSA_SLOT3_ALT: | |
6048 | case BFD_RELOC_XTENSA_SLOT4_ALT: | |
6049 | case BFD_RELOC_XTENSA_SLOT5_ALT: | |
6050 | case BFD_RELOC_XTENSA_SLOT6_ALT: | |
6051 | case BFD_RELOC_XTENSA_SLOT7_ALT: | |
6052 | case BFD_RELOC_XTENSA_SLOT8_ALT: | |
6053 | case BFD_RELOC_XTENSA_SLOT9_ALT: | |
6054 | case BFD_RELOC_XTENSA_SLOT10_ALT: | |
6055 | case BFD_RELOC_XTENSA_SLOT11_ALT: | |
6056 | case BFD_RELOC_XTENSA_SLOT12_ALT: | |
6057 | case BFD_RELOC_XTENSA_SLOT13_ALT: | |
6058 | case BFD_RELOC_XTENSA_SLOT14_ALT: | |
6059 | /* These all need to be resolved at link-time. Do nothing now. */ | |
6060 | break; | |
e0001a05 | 6061 | |
30f725a1 BW |
6062 | case BFD_RELOC_VTABLE_INHERIT: |
6063 | case BFD_RELOC_VTABLE_ENTRY: | |
6064 | fixP->fx_done = 0; | |
6065 | break; | |
e0001a05 | 6066 | |
30f725a1 BW |
6067 | default: |
6068 | as_bad (_("unhandled local relocation fix %s"), | |
6069 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
e0001a05 NC |
6070 | } |
6071 | } | |
6072 | ||
6073 | ||
6d4af3c2 | 6074 | const char * |
7fa3d080 | 6075 | md_atof (int type, char *litP, int *sizeP) |
e0001a05 | 6076 | { |
499ac353 | 6077 | return ieee_md_atof (type, litP, sizeP, target_big_endian); |
e0001a05 NC |
6078 | } |
6079 | ||
6080 | ||
6081 | int | |
7fa3d080 | 6082 | md_estimate_size_before_relax (fragS *fragP, segT seg ATTRIBUTE_UNUSED) |
e0001a05 | 6083 | { |
34e41783 | 6084 | return total_frag_text_expansion (fragP); |
e0001a05 NC |
6085 | } |
6086 | ||
6087 | ||
6088 | /* Translate internal representation of relocation info to BFD target | |
6089 | format. */ | |
6090 | ||
6091 | arelent * | |
30f725a1 | 6092 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) |
e0001a05 NC |
6093 | { |
6094 | arelent *reloc; | |
6095 | ||
325801bd TS |
6096 | reloc = XNEW (arelent); |
6097 | reloc->sym_ptr_ptr = XNEW (asymbol *); | |
e0001a05 NC |
6098 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
6099 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
6100 | ||
6101 | /* Make sure none of our internal relocations make it this far. | |
6102 | They'd better have been fully resolved by this point. */ | |
9c2799c2 | 6103 | gas_assert ((int) fixp->fx_r_type > 0); |
e0001a05 | 6104 | |
30f725a1 | 6105 | reloc->addend = fixp->fx_offset; |
43cd72b9 | 6106 | |
e0001a05 NC |
6107 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
6108 | if (reloc->howto == NULL) | |
6109 | { | |
6110 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
6111 | _("cannot represent `%s' relocation in object file"), | |
6112 | bfd_get_reloc_code_name (fixp->fx_r_type)); | |
43cd72b9 BW |
6113 | free (reloc->sym_ptr_ptr); |
6114 | free (reloc); | |
e0001a05 NC |
6115 | return NULL; |
6116 | } | |
6117 | ||
6118 | if (!fixp->fx_pcrel != !reloc->howto->pc_relative) | |
1bbb5f21 | 6119 | as_fatal (_("internal error; cannot generate `%s' relocation"), |
43cd72b9 | 6120 | bfd_get_reloc_code_name (fixp->fx_r_type)); |
e0001a05 | 6121 | |
e0001a05 NC |
6122 | return reloc; |
6123 | } | |
6124 | ||
7fa3d080 BW |
6125 | \f |
6126 | /* Checks for resource conflicts between instructions. */ | |
6127 | ||
c138bc38 BW |
6128 | /* The func unit stuff could be implemented as bit-vectors rather |
6129 | than the iterative approach here. If it ends up being too | |
7fa3d080 BW |
6130 | slow, we will switch it. */ |
6131 | ||
c138bc38 | 6132 | resource_table * |
7fa3d080 BW |
6133 | new_resource_table (void *data, |
6134 | int cycles, | |
6135 | int nu, | |
6136 | unit_num_copies_func uncf, | |
6137 | opcode_num_units_func onuf, | |
6138 | opcode_funcUnit_use_unit_func ouuf, | |
6139 | opcode_funcUnit_use_stage_func ousf) | |
6140 | { | |
6141 | int i; | |
325801bd | 6142 | resource_table *rt = XNEW (resource_table); |
7fa3d080 BW |
6143 | rt->data = data; |
6144 | rt->cycles = cycles; | |
6145 | rt->allocated_cycles = cycles; | |
6146 | rt->num_units = nu; | |
6147 | rt->unit_num_copies = uncf; | |
6148 | rt->opcode_num_units = onuf; | |
6149 | rt->opcode_unit_use = ouuf; | |
6150 | rt->opcode_unit_stage = ousf; | |
6151 | ||
add39d23 | 6152 | rt->units = XCNEWVEC (unsigned char *, cycles); |
7fa3d080 | 6153 | for (i = 0; i < cycles; i++) |
add39d23 | 6154 | rt->units[i] = XCNEWVEC (unsigned char, nu); |
7fa3d080 BW |
6155 | |
6156 | return rt; | |
6157 | } | |
6158 | ||
6159 | ||
c138bc38 | 6160 | void |
7fa3d080 BW |
6161 | clear_resource_table (resource_table *rt) |
6162 | { | |
6163 | int i, j; | |
6164 | for (i = 0; i < rt->allocated_cycles; i++) | |
6165 | for (j = 0; j < rt->num_units; j++) | |
6166 | rt->units[i][j] = 0; | |
6167 | } | |
6168 | ||
6169 | ||
6170 | /* We never shrink it, just fake it into thinking so. */ | |
6171 | ||
c138bc38 | 6172 | void |
7fa3d080 BW |
6173 | resize_resource_table (resource_table *rt, int cycles) |
6174 | { | |
6175 | int i, old_cycles; | |
6176 | ||
6177 | rt->cycles = cycles; | |
6178 | if (cycles <= rt->allocated_cycles) | |
6179 | return; | |
6180 | ||
6181 | old_cycles = rt->allocated_cycles; | |
6182 | rt->allocated_cycles = cycles; | |
6183 | ||
325801bd | 6184 | rt->units = XRESIZEVEC (unsigned char *, rt->units, rt->allocated_cycles); |
7fa3d080 | 6185 | for (i = 0; i < old_cycles; i++) |
325801bd | 6186 | rt->units[i] = XRESIZEVEC (unsigned char, rt->units[i], rt->num_units); |
7fa3d080 | 6187 | for (i = old_cycles; i < cycles; i++) |
add39d23 | 6188 | rt->units[i] = XCNEWVEC (unsigned char, rt->num_units); |
7fa3d080 BW |
6189 | } |
6190 | ||
6191 | ||
c138bc38 | 6192 | bfd_boolean |
7fa3d080 BW |
6193 | resources_available (resource_table *rt, xtensa_opcode opcode, int cycle) |
6194 | { | |
6195 | int i; | |
6196 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6197 | ||
c138bc38 | 6198 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6199 | { |
6200 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6201 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
6202 | int copies_in_use = rt->units[stage + cycle][unit]; | |
6203 | int copies = (rt->unit_num_copies) (rt->data, unit); | |
6204 | if (copies_in_use >= copies) | |
6205 | return FALSE; | |
6206 | } | |
6207 | return TRUE; | |
6208 | } | |
7fa3d080 | 6209 | |
c138bc38 BW |
6210 | |
6211 | void | |
7fa3d080 BW |
6212 | reserve_resources (resource_table *rt, xtensa_opcode opcode, int cycle) |
6213 | { | |
6214 | int i; | |
6215 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6216 | ||
c138bc38 | 6217 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6218 | { |
6219 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6220 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
c138bc38 BW |
6221 | /* Note that this allows resources to be oversubscribed. That's |
6222 | essential to the way the optional scheduler works. | |
7fa3d080 BW |
6223 | resources_available reports when a resource is over-subscribed, |
6224 | so it's easy to tell. */ | |
6225 | rt->units[stage + cycle][unit]++; | |
6226 | } | |
6227 | } | |
6228 | ||
6229 | ||
c138bc38 | 6230 | void |
7fa3d080 BW |
6231 | release_resources (resource_table *rt, xtensa_opcode opcode, int cycle) |
6232 | { | |
6233 | int i; | |
6234 | int uses = (rt->opcode_num_units) (rt->data, opcode); | |
6235 | ||
c138bc38 | 6236 | for (i = 0; i < uses; i++) |
7fa3d080 BW |
6237 | { |
6238 | xtensa_funcUnit unit = (rt->opcode_unit_use) (rt->data, opcode, i); | |
6239 | int stage = (rt->opcode_unit_stage) (rt->data, opcode, i); | |
9c2799c2 | 6240 | gas_assert (rt->units[stage + cycle][unit] > 0); |
7fa3d080 | 6241 | rt->units[stage + cycle][unit]--; |
7fa3d080 BW |
6242 | } |
6243 | } | |
c138bc38 | 6244 | |
7fa3d080 BW |
6245 | |
6246 | /* Wrapper functions make parameterized resource reservation | |
6247 | more convenient. */ | |
6248 | ||
c138bc38 | 6249 | int |
7fa3d080 BW |
6250 | opcode_funcUnit_use_unit (void *data, xtensa_opcode opcode, int idx) |
6251 | { | |
6252 | xtensa_funcUnit_use *use = xtensa_opcode_funcUnit_use (data, opcode, idx); | |
c138bc38 | 6253 | return use->unit; |
7fa3d080 BW |
6254 | } |
6255 | ||
6256 | ||
c138bc38 | 6257 | int |
7fa3d080 BW |
6258 | opcode_funcUnit_use_stage (void *data, xtensa_opcode opcode, int idx) |
6259 | { | |
6260 | xtensa_funcUnit_use *use = xtensa_opcode_funcUnit_use (data, opcode, idx); | |
6261 | return use->stage; | |
6262 | } | |
6263 | ||
6264 | ||
6265 | /* Note that this function does not check issue constraints, but | |
6266 | solely whether the hardware is available to execute the given | |
c138bc38 | 6267 | instructions together. It also doesn't check if the tinsns |
7fa3d080 | 6268 | write the same state, or access the same tieports. That is |
a1ace8d8 | 6269 | checked by check_t1_t2_reads_and_writes. */ |
7fa3d080 BW |
6270 | |
6271 | static bfd_boolean | |
6272 | resources_conflict (vliw_insn *vinsn) | |
6273 | { | |
6274 | int i; | |
6275 | static resource_table *rt = NULL; | |
6276 | ||
6277 | /* This is the most common case by far. Optimize it. */ | |
6278 | if (vinsn->num_slots == 1) | |
6279 | return FALSE; | |
43cd72b9 | 6280 | |
c138bc38 | 6281 | if (rt == NULL) |
7fa3d080 BW |
6282 | { |
6283 | xtensa_isa isa = xtensa_default_isa; | |
6284 | rt = new_resource_table | |
77cba8a3 | 6285 | (isa, xtensa_num_pipe_stages, |
7fa3d080 BW |
6286 | xtensa_isa_num_funcUnits (isa), |
6287 | (unit_num_copies_func) xtensa_funcUnit_num_copies, | |
6288 | (opcode_num_units_func) xtensa_opcode_num_funcUnit_uses, | |
6289 | opcode_funcUnit_use_unit, | |
6290 | opcode_funcUnit_use_stage); | |
6291 | } | |
43cd72b9 | 6292 | |
7fa3d080 | 6293 | clear_resource_table (rt); |
43cd72b9 | 6294 | |
7fa3d080 BW |
6295 | for (i = 0; i < vinsn->num_slots; i++) |
6296 | { | |
6297 | if (!resources_available (rt, vinsn->slots[i].opcode, 0)) | |
6298 | return TRUE; | |
6299 | reserve_resources (rt, vinsn->slots[i].opcode, 0); | |
6300 | } | |
e0001a05 | 6301 | |
7fa3d080 BW |
6302 | return FALSE; |
6303 | } | |
e0001a05 | 6304 | |
7fa3d080 BW |
6305 | \f |
6306 | /* finish_vinsn, emit_single_op and helper functions. */ | |
e0001a05 | 6307 | |
7fa3d080 BW |
6308 | static bfd_boolean find_vinsn_conflicts (vliw_insn *); |
6309 | static xtensa_format xg_find_narrowest_format (vliw_insn *); | |
7fa3d080 | 6310 | static void xg_assemble_vliw_tokens (vliw_insn *); |
e0001a05 NC |
6311 | |
6312 | ||
43cd72b9 BW |
6313 | /* We have reached the end of a bundle; emit into the frag. */ |
6314 | ||
e0001a05 | 6315 | static void |
7fa3d080 | 6316 | finish_vinsn (vliw_insn *vinsn) |
e0001a05 | 6317 | { |
43cd72b9 BW |
6318 | IStack slotstack; |
6319 | int i; | |
e0001a05 | 6320 | |
43cd72b9 | 6321 | if (find_vinsn_conflicts (vinsn)) |
a1ace8d8 BW |
6322 | { |
6323 | xg_clear_vinsn (vinsn); | |
6324 | return; | |
6325 | } | |
43cd72b9 BW |
6326 | |
6327 | /* First, find a format that works. */ | |
6328 | if (vinsn->format == XTENSA_UNDEFINED) | |
6329 | vinsn->format = xg_find_narrowest_format (vinsn); | |
6330 | ||
19fc3723 SA |
6331 | if (xtensa_format_num_slots (xtensa_default_isa, vinsn->format) > 1 |
6332 | && produce_flix == FLIX_NONE) | |
6333 | { | |
6334 | as_bad (_("The option \"--no-allow-flix\" prohibits multi-slot flix.")); | |
6335 | xg_clear_vinsn (vinsn); | |
6336 | return; | |
6337 | } | |
6338 | ||
43cd72b9 BW |
6339 | if (vinsn->format == XTENSA_UNDEFINED) |
6340 | { | |
3b4dbbbf | 6341 | as_bad (_("couldn't find a valid instruction format")); |
43cd72b9 BW |
6342 | fprintf (stderr, _(" ops were: ")); |
6343 | for (i = 0; i < vinsn->num_slots; i++) | |
6344 | fprintf (stderr, _(" %s;"), | |
6345 | xtensa_opcode_name (xtensa_default_isa, | |
6346 | vinsn->slots[i].opcode)); | |
6347 | fprintf (stderr, _("\n")); | |
6348 | xg_clear_vinsn (vinsn); | |
6349 | return; | |
6350 | } | |
6351 | ||
6352 | if (vinsn->num_slots | |
6353 | != xtensa_format_num_slots (xtensa_default_isa, vinsn->format)) | |
e0001a05 | 6354 | { |
43cd72b9 BW |
6355 | as_bad (_("format '%s' allows %d slots, but there are %d opcodes"), |
6356 | xtensa_format_name (xtensa_default_isa, vinsn->format), | |
6357 | xtensa_format_num_slots (xtensa_default_isa, vinsn->format), | |
6358 | vinsn->num_slots); | |
6359 | xg_clear_vinsn (vinsn); | |
6360 | return; | |
6361 | } | |
e0001a05 | 6362 | |
c138bc38 | 6363 | if (resources_conflict (vinsn)) |
43cd72b9 | 6364 | { |
3b4dbbbf | 6365 | as_bad (_("illegal resource usage in bundle")); |
43cd72b9 BW |
6366 | fprintf (stderr, " ops were: "); |
6367 | for (i = 0; i < vinsn->num_slots; i++) | |
6368 | fprintf (stderr, " %s;", | |
6369 | xtensa_opcode_name (xtensa_default_isa, | |
6370 | vinsn->slots[i].opcode)); | |
6371 | fprintf (stderr, "\n"); | |
6372 | xg_clear_vinsn (vinsn); | |
6373 | return; | |
6374 | } | |
6375 | ||
6376 | for (i = 0; i < vinsn->num_slots; i++) | |
6377 | { | |
6378 | if (vinsn->slots[i].opcode != XTENSA_UNDEFINED) | |
e0001a05 | 6379 | { |
43cd72b9 BW |
6380 | symbolS *lit_sym = NULL; |
6381 | int j; | |
6382 | bfd_boolean e = FALSE; | |
6383 | bfd_boolean saved_density = density_supported; | |
6384 | ||
6385 | /* We don't want to narrow ops inside multi-slot bundles. */ | |
6386 | if (vinsn->num_slots > 1) | |
6387 | density_supported = FALSE; | |
6388 | ||
6389 | istack_init (&slotstack); | |
6390 | if (vinsn->slots[i].opcode == xtensa_nop_opcode) | |
e0001a05 | 6391 | { |
43cd72b9 BW |
6392 | vinsn->slots[i].opcode = |
6393 | xtensa_format_slot_nop_opcode (xtensa_default_isa, | |
6394 | vinsn->format, i); | |
6395 | vinsn->slots[i].ntok = 0; | |
6396 | } | |
e0001a05 | 6397 | |
43cd72b9 BW |
6398 | if (xg_expand_assembly_insn (&slotstack, &vinsn->slots[i])) |
6399 | { | |
6400 | e = TRUE; | |
6401 | continue; | |
e0001a05 | 6402 | } |
e0001a05 | 6403 | |
43cd72b9 | 6404 | density_supported = saved_density; |
e0001a05 | 6405 | |
43cd72b9 BW |
6406 | if (e) |
6407 | { | |
6408 | xg_clear_vinsn (vinsn); | |
6409 | return; | |
6410 | } | |
e0001a05 | 6411 | |
0fa77c95 | 6412 | for (j = 0; j < slotstack.ninsn; j++) |
43cd72b9 BW |
6413 | { |
6414 | TInsn *insn = &slotstack.insn[j]; | |
6415 | if (insn->insn_type == ITYPE_LITERAL) | |
6416 | { | |
9c2799c2 | 6417 | gas_assert (lit_sym == NULL); |
43cd72b9 BW |
6418 | lit_sym = xg_assemble_literal (insn); |
6419 | } | |
6420 | else | |
6421 | { | |
9c2799c2 | 6422 | gas_assert (insn->insn_type == ITYPE_INSN); |
43cd72b9 BW |
6423 | if (lit_sym) |
6424 | xg_resolve_literals (insn, lit_sym); | |
0fa77c95 BW |
6425 | if (j != slotstack.ninsn - 1) |
6426 | emit_single_op (insn); | |
43cd72b9 BW |
6427 | } |
6428 | } | |
6429 | ||
6430 | if (vinsn->num_slots > 1) | |
6431 | { | |
6432 | if (opcode_fits_format_slot | |
6433 | (slotstack.insn[slotstack.ninsn - 1].opcode, | |
6434 | vinsn->format, i)) | |
6435 | { | |
6436 | vinsn->slots[i] = slotstack.insn[slotstack.ninsn - 1]; | |
6437 | } | |
6438 | else | |
6439 | { | |
b2d179be | 6440 | emit_single_op (&slotstack.insn[slotstack.ninsn - 1]); |
43cd72b9 BW |
6441 | if (vinsn->format == XTENSA_UNDEFINED) |
6442 | vinsn->slots[i].opcode = xtensa_nop_opcode; | |
6443 | else | |
c138bc38 | 6444 | vinsn->slots[i].opcode |
43cd72b9 BW |
6445 | = xtensa_format_slot_nop_opcode (xtensa_default_isa, |
6446 | vinsn->format, i); | |
6447 | ||
6448 | vinsn->slots[i].ntok = 0; | |
6449 | } | |
6450 | } | |
6451 | else | |
6452 | { | |
6453 | vinsn->slots[0] = slotstack.insn[slotstack.ninsn - 1]; | |
6454 | vinsn->format = XTENSA_UNDEFINED; | |
6455 | } | |
6456 | } | |
6457 | } | |
6458 | ||
6459 | /* Now check resource conflicts on the modified bundle. */ | |
c138bc38 | 6460 | if (resources_conflict (vinsn)) |
43cd72b9 | 6461 | { |
3b4dbbbf | 6462 | as_bad (_("illegal resource usage in bundle")); |
43cd72b9 BW |
6463 | fprintf (stderr, " ops were: "); |
6464 | for (i = 0; i < vinsn->num_slots; i++) | |
6465 | fprintf (stderr, " %s;", | |
6466 | xtensa_opcode_name (xtensa_default_isa, | |
6467 | vinsn->slots[i].opcode)); | |
6468 | fprintf (stderr, "\n"); | |
6469 | xg_clear_vinsn (vinsn); | |
6470 | return; | |
6471 | } | |
6472 | ||
6473 | /* First, find a format that works. */ | |
6474 | if (vinsn->format == XTENSA_UNDEFINED) | |
6475 | vinsn->format = xg_find_narrowest_format (vinsn); | |
6476 | ||
6477 | xg_assemble_vliw_tokens (vinsn); | |
6478 | ||
6479 | xg_clear_vinsn (vinsn); | |
a82c7d90 DW |
6480 | |
6481 | xtensa_check_frag_count (); | |
43cd72b9 BW |
6482 | } |
6483 | ||
6484 | ||
6485 | /* Given an vliw instruction, what conflicts are there in register | |
6486 | usage and in writes to states and queues? | |
6487 | ||
6488 | This function does two things: | |
6489 | 1. Reports an error when a vinsn contains illegal combinations | |
6490 | of writes to registers states or queues. | |
6491 | 2. Marks individual tinsns as not relaxable if the combination | |
6492 | contains antidependencies. | |
6493 | ||
6494 | Job 2 handles things like swap semantics in instructions that need | |
6495 | to be relaxed. For example, | |
6496 | ||
6497 | addi a0, a1, 100000 | |
6498 | ||
6499 | normally would be relaxed to | |
6500 | ||
6501 | l32r a0, some_label | |
6502 | add a0, a1, a0 | |
6503 | ||
6504 | _but_, if the above instruction is bundled with an a0 reader, e.g., | |
6505 | ||
6506 | { addi a0, a1, 10000 ; add a2, a0, a4 ; } | |
6507 | ||
6508 | then we can't relax it into | |
6509 | ||
6510 | l32r a0, some_label | |
6511 | { add a0, a1, a0 ; add a2, a0, a4 ; } | |
6512 | ||
6513 | because the value of a0 is trashed before the second add can read it. */ | |
6514 | ||
7fa3d080 BW |
6515 | static char check_t1_t2_reads_and_writes (TInsn *, TInsn *); |
6516 | ||
43cd72b9 | 6517 | static bfd_boolean |
7fa3d080 | 6518 | find_vinsn_conflicts (vliw_insn *vinsn) |
43cd72b9 BW |
6519 | { |
6520 | int i, j; | |
6521 | int branches = 0; | |
6522 | xtensa_isa isa = xtensa_default_isa; | |
6523 | ||
9c2799c2 | 6524 | gas_assert (!past_xtensa_end); |
43cd72b9 BW |
6525 | |
6526 | for (i = 0 ; i < vinsn->num_slots; i++) | |
6527 | { | |
6528 | TInsn *op1 = &vinsn->slots[i]; | |
6529 | if (op1->is_specific_opcode) | |
6530 | op1->keep_wide = TRUE; | |
6531 | else | |
6532 | op1->keep_wide = FALSE; | |
6533 | } | |
6534 | ||
6535 | for (i = 0 ; i < vinsn->num_slots; i++) | |
6536 | { | |
6537 | TInsn *op1 = &vinsn->slots[i]; | |
6538 | ||
6539 | if (xtensa_opcode_is_branch (isa, op1->opcode) == 1) | |
6540 | branches++; | |
6541 | ||
6542 | for (j = 0; j < vinsn->num_slots; j++) | |
6543 | { | |
6544 | if (i != j) | |
6545 | { | |
6546 | TInsn *op2 = &vinsn->slots[j]; | |
6547 | char conflict_type = check_t1_t2_reads_and_writes (op1, op2); | |
6548 | switch (conflict_type) | |
6549 | { | |
6550 | case 'c': | |
6551 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same register"), | |
6552 | xtensa_opcode_name (isa, op1->opcode), i, | |
6553 | xtensa_opcode_name (isa, op2->opcode), j); | |
6554 | return TRUE; | |
6555 | case 'd': | |
6556 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same state"), | |
6557 | xtensa_opcode_name (isa, op1->opcode), i, | |
6558 | xtensa_opcode_name (isa, op2->opcode), j); | |
6559 | return TRUE; | |
6560 | case 'e': | |
53dfbcc7 | 6561 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) write the same port"), |
43cd72b9 BW |
6562 | xtensa_opcode_name (isa, op1->opcode), i, |
6563 | xtensa_opcode_name (isa, op2->opcode), j); | |
6564 | return TRUE; | |
6565 | case 'f': | |
53dfbcc7 | 6566 | as_bad (_("opcodes '%s' (slot %d) and '%s' (slot %d) both have volatile port accesses"), |
43cd72b9 BW |
6567 | xtensa_opcode_name (isa, op1->opcode), i, |
6568 | xtensa_opcode_name (isa, op2->opcode), j); | |
6569 | return TRUE; | |
6570 | default: | |
6571 | /* Everything is OK. */ | |
6572 | break; | |
6573 | } | |
6574 | op2->is_specific_opcode = (op2->is_specific_opcode | |
6575 | || conflict_type == 'a'); | |
6576 | } | |
6577 | } | |
6578 | } | |
6579 | ||
6580 | if (branches > 1) | |
6581 | { | |
6582 | as_bad (_("multiple branches or jumps in the same bundle")); | |
6583 | return TRUE; | |
6584 | } | |
6585 | ||
6586 | return FALSE; | |
6587 | } | |
6588 | ||
6589 | ||
a1ace8d8 | 6590 | /* Check how the state used by t1 and t2 relate. |
43cd72b9 BW |
6591 | Cases found are: |
6592 | ||
6593 | case A: t1 reads a register t2 writes (an antidependency within a bundle) | |
6594 | case B: no relationship between what is read and written (both could | |
6595 | read the same reg though) | |
c138bc38 | 6596 | case C: t1 writes a register t2 writes (a register conflict within a |
43cd72b9 BW |
6597 | bundle) |
6598 | case D: t1 writes a state that t2 also writes | |
6599 | case E: t1 writes a tie queue that t2 also writes | |
a1ace8d8 | 6600 | case F: two volatile queue accesses |
43cd72b9 BW |
6601 | */ |
6602 | ||
6603 | static char | |
7fa3d080 | 6604 | check_t1_t2_reads_and_writes (TInsn *t1, TInsn *t2) |
43cd72b9 BW |
6605 | { |
6606 | xtensa_isa isa = xtensa_default_isa; | |
6607 | xtensa_regfile t1_regfile, t2_regfile; | |
6608 | int t1_reg, t2_reg; | |
6609 | int t1_base_reg, t1_last_reg; | |
6610 | int t2_base_reg, t2_last_reg; | |
6611 | char t1_inout, t2_inout; | |
6612 | int i, j; | |
6613 | char conflict = 'b'; | |
6614 | int t1_states; | |
6615 | int t2_states; | |
6616 | int t1_interfaces; | |
6617 | int t2_interfaces; | |
6618 | bfd_boolean t1_volatile = FALSE; | |
6619 | bfd_boolean t2_volatile = FALSE; | |
6620 | ||
6621 | /* Check registers. */ | |
6622 | for (j = 0; j < t2->ntok; j++) | |
6623 | { | |
6624 | if (xtensa_operand_is_register (isa, t2->opcode, j) != 1) | |
6625 | continue; | |
6626 | ||
6627 | t2_regfile = xtensa_operand_regfile (isa, t2->opcode, j); | |
6628 | t2_base_reg = t2->tok[j].X_add_number; | |
6629 | t2_last_reg = t2_base_reg + xtensa_operand_num_regs (isa, t2->opcode, j); | |
6630 | ||
6631 | for (i = 0; i < t1->ntok; i++) | |
6632 | { | |
6633 | if (xtensa_operand_is_register (isa, t1->opcode, i) != 1) | |
6634 | continue; | |
6635 | ||
6636 | t1_regfile = xtensa_operand_regfile (isa, t1->opcode, i); | |
6637 | ||
6638 | if (t1_regfile != t2_regfile) | |
6639 | continue; | |
6640 | ||
6641 | t1_inout = xtensa_operand_inout (isa, t1->opcode, i); | |
6642 | t2_inout = xtensa_operand_inout (isa, t2->opcode, j); | |
6643 | ||
6644 | if (xtensa_operand_is_known_reg (isa, t1->opcode, i) == 0 | |
6645 | || xtensa_operand_is_known_reg (isa, t2->opcode, j) == 0) | |
6646 | { | |
6647 | if (t1_inout == 'm' || t1_inout == 'o' | |
6648 | || t2_inout == 'm' || t2_inout == 'o') | |
6649 | { | |
6650 | conflict = 'a'; | |
6651 | continue; | |
6652 | } | |
6653 | } | |
6654 | ||
6655 | t1_base_reg = t1->tok[i].X_add_number; | |
6656 | t1_last_reg = (t1_base_reg | |
6657 | + xtensa_operand_num_regs (isa, t1->opcode, i)); | |
6658 | ||
6659 | for (t1_reg = t1_base_reg; t1_reg < t1_last_reg; t1_reg++) | |
6660 | { | |
6661 | for (t2_reg = t2_base_reg; t2_reg < t2_last_reg; t2_reg++) | |
6662 | { | |
6663 | if (t1_reg != t2_reg) | |
6664 | continue; | |
6665 | ||
6666 | if (t2_inout == 'i' && (t1_inout == 'm' || t1_inout == 'o')) | |
7fa3d080 BW |
6667 | { |
6668 | conflict = 'a'; | |
6669 | continue; | |
6670 | } | |
43cd72b9 | 6671 | |
7fa3d080 BW |
6672 | if (t1_inout == 'i' && (t2_inout == 'm' || t2_inout == 'o')) |
6673 | { | |
6674 | conflict = 'a'; | |
6675 | continue; | |
6676 | } | |
43cd72b9 | 6677 | |
7fa3d080 BW |
6678 | if (t1_inout != 'i' && t2_inout != 'i') |
6679 | return 'c'; | |
6680 | } | |
6681 | } | |
6682 | } | |
6683 | } | |
43cd72b9 | 6684 | |
7fa3d080 BW |
6685 | /* Check states. */ |
6686 | t1_states = xtensa_opcode_num_stateOperands (isa, t1->opcode); | |
6687 | t2_states = xtensa_opcode_num_stateOperands (isa, t2->opcode); | |
6688 | for (j = 0; j < t2_states; j++) | |
43cd72b9 | 6689 | { |
7fa3d080 BW |
6690 | xtensa_state t2_so = xtensa_stateOperand_state (isa, t2->opcode, j); |
6691 | t2_inout = xtensa_stateOperand_inout (isa, t2->opcode, j); | |
6692 | for (i = 0; i < t1_states; i++) | |
6693 | { | |
6694 | xtensa_state t1_so = xtensa_stateOperand_state (isa, t1->opcode, i); | |
6695 | t1_inout = xtensa_stateOperand_inout (isa, t1->opcode, i); | |
1fa3cd83 | 6696 | if (t1_so != t2_so || xtensa_state_is_shared_or (isa, t1_so) == 1) |
7fa3d080 | 6697 | continue; |
43cd72b9 | 6698 | |
7fa3d080 BW |
6699 | if (t2_inout == 'i' && (t1_inout == 'm' || t1_inout == 'o')) |
6700 | { | |
6701 | conflict = 'a'; | |
6702 | continue; | |
6703 | } | |
c138bc38 | 6704 | |
7fa3d080 BW |
6705 | if (t1_inout == 'i' && (t2_inout == 'm' || t2_inout == 'o')) |
6706 | { | |
6707 | conflict = 'a'; | |
6708 | continue; | |
6709 | } | |
c138bc38 | 6710 | |
7fa3d080 BW |
6711 | if (t1_inout != 'i' && t2_inout != 'i') |
6712 | return 'd'; | |
c138bc38 | 6713 | } |
7fa3d080 | 6714 | } |
43cd72b9 | 6715 | |
7fa3d080 BW |
6716 | /* Check tieports. */ |
6717 | t1_interfaces = xtensa_opcode_num_interfaceOperands (isa, t1->opcode); | |
6718 | t2_interfaces = xtensa_opcode_num_interfaceOperands (isa, t2->opcode); | |
c138bc38 | 6719 | for (j = 0; j < t2_interfaces; j++) |
43cd72b9 | 6720 | { |
7fa3d080 BW |
6721 | xtensa_interface t2_int |
6722 | = xtensa_interfaceOperand_interface (isa, t2->opcode, j); | |
a1ace8d8 BW |
6723 | int t2_class = xtensa_interface_class_id (isa, t2_int); |
6724 | ||
53dfbcc7 | 6725 | t2_inout = xtensa_interface_inout (isa, t2_int); |
a1ace8d8 | 6726 | if (xtensa_interface_has_side_effect (isa, t2_int) == 1) |
7fa3d080 | 6727 | t2_volatile = TRUE; |
a1ace8d8 | 6728 | |
7fa3d080 BW |
6729 | for (i = 0; i < t1_interfaces; i++) |
6730 | { | |
6731 | xtensa_interface t1_int | |
6732 | = xtensa_interfaceOperand_interface (isa, t1->opcode, j); | |
2eccd1b4 | 6733 | int t1_class = xtensa_interface_class_id (isa, t1_int); |
a1ace8d8 | 6734 | |
53dfbcc7 | 6735 | t1_inout = xtensa_interface_inout (isa, t1_int); |
a1ace8d8 | 6736 | if (xtensa_interface_has_side_effect (isa, t1_int) == 1) |
7fa3d080 | 6737 | t1_volatile = TRUE; |
a1ace8d8 BW |
6738 | |
6739 | if (t1_volatile && t2_volatile && (t1_class == t2_class)) | |
6740 | return 'f'; | |
c138bc38 | 6741 | |
7fa3d080 BW |
6742 | if (t1_int != t2_int) |
6743 | continue; | |
c138bc38 | 6744 | |
7fa3d080 BW |
6745 | if (t2_inout == 'i' && t1_inout == 'o') |
6746 | { | |
6747 | conflict = 'a'; | |
6748 | continue; | |
6749 | } | |
c138bc38 | 6750 | |
7fa3d080 BW |
6751 | if (t1_inout == 'i' && t2_inout == 'o') |
6752 | { | |
6753 | conflict = 'a'; | |
6754 | continue; | |
6755 | } | |
c138bc38 | 6756 | |
7fa3d080 BW |
6757 | if (t1_inout != 'i' && t2_inout != 'i') |
6758 | return 'e'; | |
6759 | } | |
43cd72b9 | 6760 | } |
c138bc38 | 6761 | |
7fa3d080 | 6762 | return conflict; |
43cd72b9 BW |
6763 | } |
6764 | ||
6765 | ||
6766 | static xtensa_format | |
7fa3d080 | 6767 | xg_find_narrowest_format (vliw_insn *vinsn) |
43cd72b9 BW |
6768 | { |
6769 | /* Right now we assume that the ops within the vinsn are properly | |
6770 | ordered for the slots that the programmer wanted them in. In | |
6771 | other words, we don't rearrange the ops in hopes of finding a | |
6772 | better format. The scheduler handles that. */ | |
6773 | ||
6774 | xtensa_isa isa = xtensa_default_isa; | |
6775 | xtensa_format format; | |
43cd72b9 BW |
6776 | xtensa_opcode nop_opcode = xtensa_nop_opcode; |
6777 | ||
65738a7d BW |
6778 | if (vinsn->num_slots == 1) |
6779 | return xg_get_single_format (vinsn->slots[0].opcode); | |
6780 | ||
43cd72b9 BW |
6781 | for (format = 0; format < xtensa_isa_num_formats (isa); format++) |
6782 | { | |
d8392fd9 SA |
6783 | vliw_insn v_copy; |
6784 | xg_copy_vinsn (&v_copy, vinsn); | |
43cd72b9 BW |
6785 | if (xtensa_format_num_slots (isa, format) == v_copy.num_slots) |
6786 | { | |
6787 | int slot; | |
6788 | int fit = 0; | |
6789 | for (slot = 0; slot < v_copy.num_slots; slot++) | |
6790 | { | |
6791 | if (v_copy.slots[slot].opcode == nop_opcode) | |
6792 | { | |
6793 | v_copy.slots[slot].opcode = | |
6794 | xtensa_format_slot_nop_opcode (isa, format, slot); | |
6795 | v_copy.slots[slot].ntok = 0; | |
6796 | } | |
6797 | ||
6798 | if (opcode_fits_format_slot (v_copy.slots[slot].opcode, | |
6799 | format, slot)) | |
6800 | fit++; | |
7fa3d080 | 6801 | else if (v_copy.num_slots > 1) |
43cd72b9 | 6802 | { |
7fa3d080 BW |
6803 | TInsn widened; |
6804 | /* Try the widened version. */ | |
6805 | if (!v_copy.slots[slot].keep_wide | |
6806 | && !v_copy.slots[slot].is_specific_opcode | |
84b08ed9 BW |
6807 | && xg_is_single_relaxable_insn (&v_copy.slots[slot], |
6808 | &widened, TRUE) | |
7fa3d080 BW |
6809 | && opcode_fits_format_slot (widened.opcode, |
6810 | format, slot)) | |
43cd72b9 | 6811 | { |
7fa3d080 BW |
6812 | v_copy.slots[slot] = widened; |
6813 | fit++; | |
43cd72b9 BW |
6814 | } |
6815 | } | |
6816 | } | |
6817 | if (fit == v_copy.num_slots) | |
6818 | { | |
d8392fd9 | 6819 | xg_copy_vinsn (vinsn, &v_copy); |
43cd72b9 BW |
6820 | xtensa_format_encode (isa, format, vinsn->insnbuf); |
6821 | vinsn->format = format; | |
6822 | break; | |
6823 | } | |
6824 | } | |
6825 | } | |
6826 | ||
6827 | if (format == xtensa_isa_num_formats (isa)) | |
6828 | return XTENSA_UNDEFINED; | |
6829 | ||
6830 | return format; | |
6831 | } | |
6832 | ||
6833 | ||
6834 | /* Return the additional space needed in a frag | |
6835 | for possible relaxations of any ops in a VLIW insn. | |
6836 | Also fill out the relaxations that might be required of | |
6837 | each tinsn in the vinsn. */ | |
6838 | ||
6839 | static int | |
e7da6241 | 6840 | relaxation_requirements (vliw_insn *vinsn, bfd_boolean *pfinish_frag) |
43cd72b9 | 6841 | { |
e7da6241 | 6842 | bfd_boolean finish_frag = FALSE; |
43cd72b9 BW |
6843 | int extra_space = 0; |
6844 | int slot; | |
6845 | ||
6846 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
6847 | { | |
6848 | TInsn *tinsn = &vinsn->slots[slot]; | |
6849 | if (!tinsn_has_symbolic_operands (tinsn)) | |
6850 | { | |
6851 | /* A narrow instruction could be widened later to help | |
6852 | alignment issues. */ | |
84b08ed9 | 6853 | if (xg_is_single_relaxable_insn (tinsn, 0, TRUE) |
43cd72b9 BW |
6854 | && !tinsn->is_specific_opcode |
6855 | && vinsn->num_slots == 1) | |
6856 | { | |
6857 | /* Difference in bytes between narrow and wide insns... */ | |
6858 | extra_space += 1; | |
6859 | tinsn->subtype = RELAX_NARROW; | |
43cd72b9 BW |
6860 | } |
6861 | } | |
6862 | else | |
6863 | { | |
b08b5071 BW |
6864 | if (workaround_b_j_loop_end |
6865 | && tinsn->opcode == xtensa_jx_opcode | |
43cd72b9 BW |
6866 | && use_transform ()) |
6867 | { | |
6868 | /* Add 2 of these. */ | |
6869 | extra_space += 3; /* for the nop size */ | |
6870 | tinsn->subtype = RELAX_ADD_NOP_IF_PRE_LOOP_END; | |
6871 | } | |
c138bc38 | 6872 | |
43cd72b9 BW |
6873 | /* Need to assemble it with space for the relocation. */ |
6874 | if (xg_is_relaxable_insn (tinsn, 0) | |
6875 | && !tinsn->is_specific_opcode) | |
6876 | { | |
6877 | int max_size = xg_get_max_insn_widen_size (tinsn->opcode); | |
6878 | int max_literal_size = | |
6879 | xg_get_max_insn_widen_literal_size (tinsn->opcode); | |
c138bc38 | 6880 | |
43cd72b9 | 6881 | tinsn->literal_space = max_literal_size; |
c138bc38 | 6882 | |
43cd72b9 | 6883 | tinsn->subtype = RELAX_IMMED; |
43cd72b9 BW |
6884 | extra_space += max_size; |
6885 | } | |
6886 | else | |
6887 | { | |
e7da6241 BW |
6888 | /* A fix record will be added for this instruction prior |
6889 | to relaxation, so make it end the frag. */ | |
6890 | finish_frag = TRUE; | |
43cd72b9 BW |
6891 | } |
6892 | } | |
6893 | } | |
e7da6241 | 6894 | *pfinish_frag = finish_frag; |
43cd72b9 BW |
6895 | return extra_space; |
6896 | } | |
6897 | ||
6898 | ||
6899 | static void | |
b2d179be | 6900 | bundle_tinsn (TInsn *tinsn, vliw_insn *vinsn) |
43cd72b9 BW |
6901 | { |
6902 | xtensa_isa isa = xtensa_default_isa; | |
b2d179be | 6903 | int slot, chosen_slot; |
43cd72b9 | 6904 | |
b2d179be | 6905 | vinsn->format = xg_get_single_format (tinsn->opcode); |
9c2799c2 | 6906 | gas_assert (vinsn->format != XTENSA_UNDEFINED); |
b2d179be | 6907 | vinsn->num_slots = xtensa_format_num_slots (isa, vinsn->format); |
43cd72b9 | 6908 | |
b2d179be BW |
6909 | chosen_slot = xg_get_single_slot (tinsn->opcode); |
6910 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
43cd72b9 | 6911 | { |
b2d179be BW |
6912 | if (slot == chosen_slot) |
6913 | vinsn->slots[slot] = *tinsn; | |
6914 | else | |
6915 | { | |
6916 | vinsn->slots[slot].opcode = | |
6917 | xtensa_format_slot_nop_opcode (isa, vinsn->format, slot); | |
6918 | vinsn->slots[slot].ntok = 0; | |
6919 | vinsn->slots[slot].insn_type = ITYPE_INSN; | |
6920 | } | |
43cd72b9 | 6921 | } |
43cd72b9 BW |
6922 | } |
6923 | ||
6924 | ||
6925 | static bfd_boolean | |
7fa3d080 | 6926 | emit_single_op (TInsn *orig_insn) |
43cd72b9 BW |
6927 | { |
6928 | int i; | |
6929 | IStack istack; /* put instructions into here */ | |
6930 | symbolS *lit_sym = NULL; | |
6931 | symbolS *label_sym = NULL; | |
6932 | ||
6933 | istack_init (&istack); | |
6934 | ||
6935 | /* Special-case for "movi aX, foo" which is guaranteed to need relaxing. | |
c138bc38 BW |
6936 | Because the scheduling and bundling characteristics of movi and |
6937 | l32r or const16 are so different, we can do much better if we relax | |
43cd72b9 | 6938 | it prior to scheduling and bundling, rather than after. */ |
c138bc38 | 6939 | if ((orig_insn->opcode == xtensa_movi_opcode |
b08b5071 BW |
6940 | || orig_insn->opcode == xtensa_movi_n_opcode) |
6941 | && !cur_vinsn.inside_bundle | |
43cd72b9 | 6942 | && (orig_insn->tok[1].X_op == O_symbol |
28dbbc02 BW |
6943 | || orig_insn->tok[1].X_op == O_pltrel |
6944 | || orig_insn->tok[1].X_op == O_tlsfunc | |
6945 | || orig_insn->tok[1].X_op == O_tlsarg | |
6946 | || orig_insn->tok[1].X_op == O_tpoff | |
6947 | || orig_insn->tok[1].X_op == O_dtpoff) | |
482fd9f9 | 6948 | && !orig_insn->is_specific_opcode && use_transform ()) |
43cd72b9 BW |
6949 | xg_assembly_relax (&istack, orig_insn, now_seg, frag_now, 0, 1, 0); |
6950 | else | |
6951 | if (xg_expand_assembly_insn (&istack, orig_insn)) | |
6952 | return TRUE; | |
6953 | ||
6954 | for (i = 0; i < istack.ninsn; i++) | |
6955 | { | |
6956 | TInsn *insn = &istack.insn[i]; | |
c138bc38 | 6957 | switch (insn->insn_type) |
43cd72b9 BW |
6958 | { |
6959 | case ITYPE_LITERAL: | |
9c2799c2 | 6960 | gas_assert (lit_sym == NULL); |
43cd72b9 BW |
6961 | lit_sym = xg_assemble_literal (insn); |
6962 | break; | |
6963 | case ITYPE_LABEL: | |
6964 | { | |
6965 | static int relaxed_sym_idx = 0; | |
325801bd | 6966 | char *label = XNEWVEC (char, strlen (FAKE_LABEL_NAME) + 12); |
43cd72b9 BW |
6967 | sprintf (label, "%s_rl_%x", FAKE_LABEL_NAME, relaxed_sym_idx++); |
6968 | colon (label); | |
9c2799c2 | 6969 | gas_assert (label_sym == NULL); |
43cd72b9 | 6970 | label_sym = symbol_find_or_make (label); |
9c2799c2 | 6971 | gas_assert (label_sym); |
43cd72b9 BW |
6972 | free (label); |
6973 | } | |
6974 | break; | |
6975 | case ITYPE_INSN: | |
b2d179be BW |
6976 | { |
6977 | vliw_insn v; | |
6978 | if (lit_sym) | |
6979 | xg_resolve_literals (insn, lit_sym); | |
6980 | if (label_sym) | |
6981 | xg_resolve_labels (insn, label_sym); | |
6982 | xg_init_vinsn (&v); | |
6983 | bundle_tinsn (insn, &v); | |
6984 | finish_vinsn (&v); | |
6985 | xg_free_vinsn (&v); | |
6986 | } | |
43cd72b9 BW |
6987 | break; |
6988 | default: | |
9c2799c2 | 6989 | gas_assert (0); |
43cd72b9 BW |
6990 | break; |
6991 | } | |
6992 | } | |
6993 | return FALSE; | |
6994 | } | |
6995 | ||
6996 | ||
34e41783 BW |
6997 | static int |
6998 | total_frag_text_expansion (fragS *fragP) | |
6999 | { | |
7000 | int slot; | |
7001 | int total_expansion = 0; | |
7002 | ||
62af60e2 | 7003 | for (slot = 0; slot < config_max_slots; slot++) |
34e41783 BW |
7004 | total_expansion += fragP->tc_frag_data.text_expansion[slot]; |
7005 | ||
7006 | return total_expansion; | |
7007 | } | |
7008 | ||
7009 | ||
43cd72b9 BW |
7010 | /* Emit a vliw instruction to the current fragment. */ |
7011 | ||
7fa3d080 BW |
7012 | static void |
7013 | xg_assemble_vliw_tokens (vliw_insn *vinsn) | |
43cd72b9 | 7014 | { |
e7da6241 | 7015 | bfd_boolean finish_frag; |
43cd72b9 BW |
7016 | bfd_boolean is_jump = FALSE; |
7017 | bfd_boolean is_branch = FALSE; | |
7018 | xtensa_isa isa = xtensa_default_isa; | |
43cd72b9 BW |
7019 | int insn_size; |
7020 | int extra_space; | |
7021 | char *f = NULL; | |
7022 | int slot; | |
b224e962 BW |
7023 | struct dwarf2_line_info debug_line; |
7024 | bfd_boolean loc_directive_seen = FALSE; | |
7025 | TInsn *tinsn; | |
43cd72b9 | 7026 | |
b224e962 | 7027 | memset (&debug_line, 0, sizeof (struct dwarf2_line_info)); |
43cd72b9 BW |
7028 | |
7029 | if (generating_literals) | |
7030 | { | |
7031 | static int reported = 0; | |
7032 | if (reported < 4) | |
7033 | as_bad_where (frag_now->fr_file, frag_now->fr_line, | |
7034 | _("cannot assemble into a literal fragment")); | |
7035 | if (reported == 3) | |
7036 | as_bad (_("...")); | |
7037 | reported++; | |
7038 | return; | |
7039 | } | |
7040 | ||
7041 | if (frag_now_fix () != 0 | |
b08b5071 | 7042 | && (! frag_now->tc_frag_data.is_insn |
43cd72b9 | 7043 | || (vinsn_has_specific_opcodes (vinsn) && use_transform ()) |
28a0da39 | 7044 | || (!use_transform ()) != frag_now->tc_frag_data.is_no_transform |
7c834684 BW |
7045 | || (directive_state[directive_longcalls] |
7046 | != frag_now->tc_frag_data.use_longcalls) | |
43cd72b9 BW |
7047 | || (directive_state[directive_absolute_literals] |
7048 | != frag_now->tc_frag_data.use_absolute_literals))) | |
7049 | { | |
7050 | frag_wane (frag_now); | |
7051 | frag_new (0); | |
7052 | xtensa_set_frag_assembly_state (frag_now); | |
7053 | } | |
7054 | ||
7055 | if (workaround_a0_b_retw | |
7056 | && vinsn->num_slots == 1 | |
7057 | && (get_last_insn_flags (now_seg, now_subseg) & FLAG_IS_A0_WRITER) != 0 | |
7058 | && xtensa_opcode_is_branch (isa, vinsn->slots[0].opcode) == 1 | |
7059 | && use_transform ()) | |
7060 | { | |
7061 | has_a0_b_retw = TRUE; | |
7062 | ||
7063 | /* Mark this fragment with the special RELAX_ADD_NOP_IF_A0_B_RETW. | |
7064 | After the first assembly pass we will check all of them and | |
7065 | add a nop if needed. */ | |
7066 | frag_now->tc_frag_data.is_insn = TRUE; | |
7067 | frag_var (rs_machine_dependent, 4, 4, | |
7068 | RELAX_ADD_NOP_IF_A0_B_RETW, | |
7069 | frag_now->fr_symbol, | |
7070 | frag_now->fr_offset, | |
7071 | NULL); | |
7072 | xtensa_set_frag_assembly_state (frag_now); | |
7073 | frag_now->tc_frag_data.is_insn = TRUE; | |
7074 | frag_var (rs_machine_dependent, 4, 4, | |
7075 | RELAX_ADD_NOP_IF_A0_B_RETW, | |
7076 | frag_now->fr_symbol, | |
7077 | frag_now->fr_offset, | |
7078 | NULL); | |
7079 | xtensa_set_frag_assembly_state (frag_now); | |
7080 | } | |
7081 | ||
b224e962 | 7082 | for (slot = 0; slot < vinsn->num_slots; slot++) |
43cd72b9 | 7083 | { |
b224e962 BW |
7084 | tinsn = &vinsn->slots[slot]; |
7085 | ||
43cd72b9 | 7086 | /* See if the instruction implies an aligned section. */ |
b224e962 | 7087 | if (xtensa_opcode_is_loop (isa, tinsn->opcode) == 1) |
43cd72b9 | 7088 | record_alignment (now_seg, 2); |
c138bc38 | 7089 | |
b224e962 BW |
7090 | /* Determine the best line number for debug info. */ |
7091 | if ((tinsn->loc_directive_seen || !loc_directive_seen) | |
7092 | && (tinsn->debug_line.filenum != debug_line.filenum | |
7093 | || tinsn->debug_line.line < debug_line.line | |
7094 | || tinsn->debug_line.column < debug_line.column)) | |
7095 | debug_line = tinsn->debug_line; | |
7096 | if (tinsn->loc_directive_seen) | |
7097 | loc_directive_seen = TRUE; | |
43cd72b9 BW |
7098 | } |
7099 | ||
7100 | /* Special cases for instructions that force an alignment... */ | |
7101 | /* None of these opcodes are bundle-able. */ | |
7102 | if (xtensa_opcode_is_loop (isa, vinsn->slots[0].opcode) == 1) | |
7103 | { | |
d77b99c9 | 7104 | int max_fill; |
c138bc38 | 7105 | |
05d58145 BW |
7106 | /* Remember the symbol that marks the end of the loop in the frag |
7107 | that marks the start of the loop. This way we can easily find | |
7108 | the end of the loop at the beginning, without adding special code | |
7109 | to mark the loop instructions themselves. */ | |
7110 | symbolS *target_sym = NULL; | |
7111 | if (vinsn->slots[0].tok[1].X_op == O_symbol) | |
7112 | target_sym = vinsn->slots[0].tok[1].X_add_symbol; | |
7113 | ||
43cd72b9 BW |
7114 | xtensa_set_frag_assembly_state (frag_now); |
7115 | frag_now->tc_frag_data.is_insn = TRUE; | |
c138bc38 | 7116 | |
43cd72b9 BW |
7117 | max_fill = get_text_align_max_fill_size |
7118 | (get_text_align_power (xtensa_fetch_width), | |
7119 | TRUE, frag_now->tc_frag_data.is_no_density); | |
7120 | ||
7121 | if (use_transform ()) | |
7122 | frag_var (rs_machine_dependent, max_fill, max_fill, | |
05d58145 | 7123 | RELAX_ALIGN_NEXT_OPCODE, target_sym, 0, NULL); |
43cd72b9 | 7124 | else |
c138bc38 | 7125 | frag_var (rs_machine_dependent, 0, 0, |
05d58145 | 7126 | RELAX_CHECK_ALIGN_NEXT_OPCODE, target_sym, 0, NULL); |
43cd72b9 | 7127 | xtensa_set_frag_assembly_state (frag_now); |
43cd72b9 BW |
7128 | } |
7129 | ||
b08b5071 | 7130 | if (vinsn->slots[0].opcode == xtensa_entry_opcode |
43cd72b9 BW |
7131 | && !vinsn->slots[0].is_specific_opcode) |
7132 | { | |
7133 | xtensa_mark_literal_pool_location (); | |
c3ea6048 | 7134 | xtensa_move_labels (frag_now, 0); |
43cd72b9 BW |
7135 | frag_var (rs_align_test, 1, 1, 0, NULL, 2, NULL); |
7136 | } | |
7137 | ||
7138 | if (vinsn->num_slots == 1) | |
7139 | { | |
7140 | if (workaround_a0_b_retw && use_transform ()) | |
7141 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_A0_WRITER, | |
7142 | is_register_writer (&vinsn->slots[0], "a", 0)); | |
7143 | ||
7144 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_BAD_LOOPEND, | |
7145 | is_bad_loopend_opcode (&vinsn->slots[0])); | |
7146 | } | |
7147 | else | |
7148 | set_last_insn_flags (now_seg, now_subseg, FLAG_IS_BAD_LOOPEND, FALSE); | |
7149 | ||
7150 | insn_size = xtensa_format_length (isa, vinsn->format); | |
7151 | ||
e7da6241 | 7152 | extra_space = relaxation_requirements (vinsn, &finish_frag); |
43cd72b9 BW |
7153 | |
7154 | /* vinsn_to_insnbuf will produce the error. */ | |
7155 | if (vinsn->format != XTENSA_UNDEFINED) | |
7156 | { | |
d77b99c9 | 7157 | f = frag_more (insn_size + extra_space); |
43cd72b9 BW |
7158 | xtensa_set_frag_assembly_state (frag_now); |
7159 | frag_now->tc_frag_data.is_insn = TRUE; | |
7160 | } | |
7161 | ||
e7da6241 | 7162 | vinsn_to_insnbuf (vinsn, f, frag_now, FALSE); |
43cd72b9 BW |
7163 | if (vinsn->format == XTENSA_UNDEFINED) |
7164 | return; | |
7165 | ||
d77b99c9 | 7166 | xtensa_insnbuf_to_chars (isa, vinsn->insnbuf, (unsigned char *) f, 0); |
c138bc38 | 7167 | |
b224e962 BW |
7168 | if (debug_type == DEBUG_DWARF2 || loc_directive_seen) |
7169 | dwarf2_gen_line_info (frag_now_fix () - (insn_size + extra_space), | |
7170 | &debug_line); | |
43cd72b9 BW |
7171 | |
7172 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
7173 | { | |
b224e962 | 7174 | tinsn = &vinsn->slots[slot]; |
43cd72b9 | 7175 | frag_now->tc_frag_data.slot_subtypes[slot] = tinsn->subtype; |
7c834684 | 7176 | frag_now->tc_frag_data.slot_symbols[slot] = tinsn->symbol; |
7c834684 | 7177 | frag_now->tc_frag_data.slot_offsets[slot] = tinsn->offset; |
43cd72b9 | 7178 | frag_now->tc_frag_data.literal_frags[slot] = tinsn->literal_frag; |
b46824bd MF |
7179 | if (tinsn->opcode == xtensa_l32r_opcode) |
7180 | { | |
7181 | frag_now->tc_frag_data.literal_frags[slot] = | |
7182 | tinsn->tok[1].X_add_symbol->sy_frag; | |
7183 | } | |
43cd72b9 BW |
7184 | if (tinsn->literal_space != 0) |
7185 | xg_assemble_literal_space (tinsn->literal_space, slot); | |
19e8f41a | 7186 | frag_now->tc_frag_data.free_reg[slot] = tinsn->extra_arg; |
43cd72b9 BW |
7187 | |
7188 | if (tinsn->subtype == RELAX_NARROW) | |
9c2799c2 | 7189 | gas_assert (vinsn->num_slots == 1); |
43cd72b9 BW |
7190 | if (xtensa_opcode_is_jump (isa, tinsn->opcode) == 1) |
7191 | is_jump = TRUE; | |
7192 | if (xtensa_opcode_is_branch (isa, tinsn->opcode) == 1) | |
7193 | is_branch = TRUE; | |
7194 | ||
e7da6241 BW |
7195 | if (tinsn->subtype || tinsn->symbol || tinsn->offset |
7196 | || tinsn->literal_frag || is_jump || is_branch) | |
43cd72b9 BW |
7197 | finish_frag = TRUE; |
7198 | } | |
7199 | ||
7200 | if (vinsn_has_specific_opcodes (vinsn) && use_transform ()) | |
b08b5071 | 7201 | frag_now->tc_frag_data.is_specific_opcode = TRUE; |
43cd72b9 BW |
7202 | |
7203 | if (finish_frag) | |
7204 | { | |
7205 | frag_variant (rs_machine_dependent, | |
7206 | extra_space, extra_space, RELAX_SLOTS, | |
7207 | frag_now->fr_symbol, frag_now->fr_offset, f); | |
7208 | xtensa_set_frag_assembly_state (frag_now); | |
7209 | } | |
7210 | ||
7211 | /* Special cases for loops: | |
7212 | close_loop_end should be inserted AFTER short_loop. | |
7213 | Make sure that CLOSE loops are processed BEFORE short_loops | |
7214 | when converting them. */ | |
7215 | ||
7216 | /* "short_loop": Add a NOP if the loop is < 4 bytes. */ | |
64b607e6 | 7217 | if (xtensa_opcode_is_loop (isa, vinsn->slots[0].opcode) == 1 |
43cd72b9 BW |
7218 | && !vinsn->slots[0].is_specific_opcode) |
7219 | { | |
7220 | if (workaround_short_loop && use_transform ()) | |
7221 | { | |
7222 | maybe_has_short_loop = TRUE; | |
7223 | frag_now->tc_frag_data.is_insn = TRUE; | |
7224 | frag_var (rs_machine_dependent, 4, 4, | |
7225 | RELAX_ADD_NOP_IF_SHORT_LOOP, | |
7226 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7227 | frag_now->tc_frag_data.is_insn = TRUE; | |
7228 | frag_var (rs_machine_dependent, 4, 4, | |
7229 | RELAX_ADD_NOP_IF_SHORT_LOOP, | |
7230 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7231 | } | |
7232 | ||
7233 | /* "close_loop_end": Add up to 12 bytes of NOPs to keep a | |
7234 | loop at least 12 bytes away from another loop's end. */ | |
7235 | if (workaround_close_loop_end && use_transform ()) | |
7236 | { | |
7237 | maybe_has_close_loop_end = TRUE; | |
7238 | frag_now->tc_frag_data.is_insn = TRUE; | |
7239 | frag_var (rs_machine_dependent, 12, 12, | |
7240 | RELAX_ADD_NOP_IF_CLOSE_LOOP_END, | |
7241 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7242 | } | |
7243 | } | |
7244 | ||
7245 | if (use_transform ()) | |
7246 | { | |
7247 | if (is_jump) | |
7248 | { | |
9c2799c2 | 7249 | gas_assert (finish_frag); |
43cd72b9 | 7250 | frag_var (rs_machine_dependent, |
1beeb686 | 7251 | xtensa_fetch_width, xtensa_fetch_width, |
43cd72b9 BW |
7252 | RELAX_UNREACHABLE, |
7253 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7254 | xtensa_set_frag_assembly_state (frag_now); | |
a82c7d90 | 7255 | xtensa_maybe_create_trampoline_frag (); |
b46824bd MF |
7256 | /* Always create one here. */ |
7257 | xtensa_maybe_create_literal_pool_frag (TRUE, FALSE); | |
43cd72b9 | 7258 | } |
7b1cc377 | 7259 | else if (is_branch && do_align_targets ()) |
43cd72b9 | 7260 | { |
9c2799c2 | 7261 | gas_assert (finish_frag); |
43cd72b9 | 7262 | frag_var (rs_machine_dependent, |
1beeb686 | 7263 | xtensa_fetch_width, xtensa_fetch_width, |
43cd72b9 BW |
7264 | RELAX_MAYBE_UNREACHABLE, |
7265 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7266 | xtensa_set_frag_assembly_state (frag_now); | |
7267 | frag_var (rs_machine_dependent, | |
7268 | 0, 0, | |
7269 | RELAX_MAYBE_DESIRE_ALIGN, | |
7270 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7271 | xtensa_set_frag_assembly_state (frag_now); | |
7272 | } | |
7273 | } | |
7274 | ||
7275 | /* Now, if the original opcode was a call... */ | |
7276 | if (do_align_targets () | |
7277 | && xtensa_opcode_is_call (isa, vinsn->slots[0].opcode) == 1) | |
7278 | { | |
b08b5071 | 7279 | float freq = get_subseg_total_freq (now_seg, now_subseg); |
43cd72b9 BW |
7280 | frag_now->tc_frag_data.is_insn = TRUE; |
7281 | frag_var (rs_machine_dependent, 4, (int) freq, RELAX_DESIRE_ALIGN, | |
7282 | frag_now->fr_symbol, frag_now->fr_offset, NULL); | |
7283 | xtensa_set_frag_assembly_state (frag_now); | |
7284 | } | |
7285 | ||
7286 | if (vinsn_has_specific_opcodes (vinsn) && use_transform ()) | |
7287 | { | |
7288 | frag_wane (frag_now); | |
7289 | frag_new (0); | |
7290 | xtensa_set_frag_assembly_state (frag_now); | |
7291 | } | |
7292 | } | |
7293 | ||
7294 | \f | |
7fa3d080 BW |
7295 | /* xtensa_end and helper functions. */ |
7296 | ||
7297 | static void xtensa_cleanup_align_frags (void); | |
7298 | static void xtensa_fix_target_frags (void); | |
7299 | static void xtensa_mark_narrow_branches (void); | |
7300 | static void xtensa_mark_zcl_first_insns (void); | |
6a7eedfe | 7301 | static void xtensa_mark_difference_of_two_symbols (void); |
7fa3d080 BW |
7302 | static void xtensa_fix_a0_b_retw_frags (void); |
7303 | static void xtensa_fix_b_j_loop_end_frags (void); | |
7304 | static void xtensa_fix_close_loop_end_frags (void); | |
7305 | static void xtensa_fix_short_loop_frags (void); | |
7306 | static void xtensa_sanity_check (void); | |
2caa7ca0 | 7307 | static void xtensa_add_config_info (void); |
7fa3d080 | 7308 | |
43cd72b9 | 7309 | void |
7fa3d080 | 7310 | xtensa_end (void) |
43cd72b9 BW |
7311 | { |
7312 | directive_balance (); | |
7313 | xtensa_flush_pending_output (); | |
7314 | ||
7315 | past_xtensa_end = TRUE; | |
7316 | ||
7317 | xtensa_move_literals (); | |
7318 | ||
7319 | xtensa_reorder_segments (); | |
7320 | xtensa_cleanup_align_frags (); | |
7321 | xtensa_fix_target_frags (); | |
7322 | if (workaround_a0_b_retw && has_a0_b_retw) | |
7323 | xtensa_fix_a0_b_retw_frags (); | |
7324 | if (workaround_b_j_loop_end) | |
7325 | xtensa_fix_b_j_loop_end_frags (); | |
7326 | ||
7327 | /* "close_loop_end" should be processed BEFORE "short_loop". */ | |
7328 | if (workaround_close_loop_end && maybe_has_close_loop_end) | |
7329 | xtensa_fix_close_loop_end_frags (); | |
7330 | ||
7331 | if (workaround_short_loop && maybe_has_short_loop) | |
7332 | xtensa_fix_short_loop_frags (); | |
03aaa593 BW |
7333 | if (align_targets) |
7334 | xtensa_mark_narrow_branches (); | |
43cd72b9 BW |
7335 | xtensa_mark_zcl_first_insns (); |
7336 | ||
7337 | xtensa_sanity_check (); | |
2caa7ca0 BW |
7338 | |
7339 | xtensa_add_config_info (); | |
a82c7d90 DW |
7340 | |
7341 | xtensa_check_frag_count (); | |
43cd72b9 BW |
7342 | } |
7343 | ||
7344 | ||
a82c7d90 DW |
7345 | struct trampoline_frag |
7346 | { | |
7347 | struct trampoline_frag *next; | |
7348 | bfd_boolean needs_jump_around; | |
7349 | fragS *fragP; | |
7350 | fixS *fixP; | |
7351 | }; | |
7352 | ||
7353 | struct trampoline_seg | |
7354 | { | |
7355 | struct trampoline_seg *next; | |
7356 | asection *seg; | |
7357 | struct trampoline_frag trampoline_list; | |
7358 | }; | |
7359 | ||
7360 | static struct trampoline_seg trampoline_seg_list; | |
7361 | #define J_RANGE (128 * 1024) | |
7362 | ||
7363 | static int unreachable_count = 0; | |
7364 | ||
7365 | ||
7366 | static void | |
7367 | xtensa_maybe_create_trampoline_frag (void) | |
7368 | { | |
7369 | if (!use_trampolines) | |
7370 | return; | |
7371 | ||
7372 | /* We create an area for possible trampolines every 10 unreachable frags. | |
7373 | These are preferred over the ones not preceded by an unreachable frag, | |
7374 | because we don't have to jump around them. This function is called after | |
7375 | each RELAX_UNREACHABLE frag is created. */ | |
7376 | ||
7377 | if (++unreachable_count > 10) | |
7378 | { | |
7379 | xtensa_create_trampoline_frag (FALSE); | |
7380 | clear_frag_count (); | |
7381 | unreachable_count = 0; | |
7382 | } | |
7383 | } | |
7384 | ||
7385 | static void | |
7386 | xtensa_check_frag_count (void) | |
7387 | { | |
7388 | if (!use_trampolines || frag_now->tc_frag_data.is_no_transform) | |
7389 | return; | |
7390 | ||
7391 | /* We create an area for possible trampolines every 8000 frags or so. This | |
7392 | is an estimate based on the max range of a "j" insn (+/-128K) divided | |
7393 | by a typical frag byte count (16), minus a few for safety. This function | |
7394 | is called after each source line is processed. */ | |
7395 | ||
7396 | if (get_frag_count () > 8000) | |
7397 | { | |
7398 | xtensa_create_trampoline_frag (TRUE); | |
7399 | clear_frag_count (); | |
7400 | unreachable_count = 0; | |
7401 | } | |
b46824bd MF |
7402 | |
7403 | /* We create an area for a possible literal pool every N (default 5000) | |
7404 | frags or so. */ | |
7405 | xtensa_maybe_create_literal_pool_frag (TRUE, TRUE); | |
a82c7d90 DW |
7406 | } |
7407 | ||
7408 | static xtensa_insnbuf trampoline_buf = NULL; | |
7409 | static xtensa_insnbuf trampoline_slotbuf = NULL; | |
7410 | ||
b46824bd MF |
7411 | static xtensa_insnbuf litpool_buf = NULL; |
7412 | static xtensa_insnbuf litpool_slotbuf = NULL; | |
7413 | ||
a82c7d90 DW |
7414 | #define TRAMPOLINE_FRAG_SIZE 3000 |
7415 | ||
7416 | static void | |
7417 | xtensa_create_trampoline_frag (bfd_boolean needs_jump_around) | |
7418 | { | |
7419 | /* Emit a frag where we can place intermediate jump instructions, | |
7420 | in case we need to jump farther than 128K bytes. | |
7421 | Each jump instruction takes three bytes. | |
7422 | We allocate enough for 1000 trampolines in each frag. | |
7423 | If that's not enough, oh well. */ | |
7424 | ||
7425 | struct trampoline_seg *ts = trampoline_seg_list.next; | |
7426 | struct trampoline_frag *tf; | |
7427 | char *varP; | |
7428 | fragS *fragP; | |
7429 | int size = TRAMPOLINE_FRAG_SIZE; | |
7430 | ||
7431 | for ( ; ts; ts = ts->next) | |
7432 | { | |
7433 | if (ts->seg == now_seg) | |
7434 | break; | |
7435 | } | |
7436 | ||
7437 | if (ts == NULL) | |
7438 | { | |
add39d23 | 7439 | ts = XCNEW(struct trampoline_seg); |
a82c7d90 DW |
7440 | ts->next = trampoline_seg_list.next; |
7441 | trampoline_seg_list.next = ts; | |
7442 | ts->seg = now_seg; | |
7443 | } | |
7444 | ||
7445 | frag_wane (frag_now); | |
7446 | frag_new (0); | |
7447 | xtensa_set_frag_assembly_state (frag_now); | |
7448 | varP = frag_var (rs_machine_dependent, size, size, RELAX_TRAMPOLINE, NULL, 0, NULL); | |
7449 | fragP = (fragS *)(varP - SIZEOF_STRUCT_FRAG); | |
7450 | if (trampoline_buf == NULL) | |
7451 | { | |
7452 | trampoline_buf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
7453 | trampoline_slotbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
7454 | } | |
325801bd | 7455 | tf = XNEW (struct trampoline_frag); |
a82c7d90 DW |
7456 | tf->next = ts->trampoline_list.next; |
7457 | ts->trampoline_list.next = tf; | |
7458 | tf->needs_jump_around = needs_jump_around; | |
7459 | tf->fragP = fragP; | |
7460 | tf->fixP = NULL; | |
7461 | } | |
7462 | ||
7463 | ||
7464 | static struct trampoline_seg * | |
7465 | find_trampoline_seg (asection *seg) | |
7466 | { | |
7467 | struct trampoline_seg *ts = trampoline_seg_list.next; | |
7468 | ||
7469 | for ( ; ts; ts = ts->next) | |
7470 | { | |
7471 | if (ts->seg == seg) | |
7472 | return ts; | |
7473 | } | |
7474 | ||
7475 | return NULL; | |
7476 | } | |
7477 | ||
7478 | ||
7479 | void dump_trampolines (void); | |
7480 | ||
7481 | void | |
7482 | dump_trampolines (void) | |
7483 | { | |
7484 | struct trampoline_seg *ts = trampoline_seg_list.next; | |
7485 | ||
7486 | for ( ; ts; ts = ts->next) | |
7487 | { | |
7488 | asection *seg = ts->seg; | |
7489 | ||
7490 | if (seg == NULL) | |
7491 | continue; | |
7492 | fprintf(stderr, "SECTION %s\n", seg->name); | |
7493 | struct trampoline_frag *tf = ts->trampoline_list.next; | |
7494 | for ( ; tf; tf = tf->next) | |
7495 | { | |
7496 | if (tf->fragP == NULL) | |
7497 | continue; | |
7498 | fprintf(stderr, " 0x%08x: fix=%d, jump_around=%s\n", | |
7499 | (int)tf->fragP->fr_address, (int)tf->fragP->fr_fix, | |
7500 | tf->needs_jump_around ? "T" : "F"); | |
7501 | } | |
7502 | } | |
7503 | } | |
7504 | ||
b46824bd MF |
7505 | static void dump_litpools (void) __attribute__ ((unused)); |
7506 | ||
7507 | static void | |
7508 | dump_litpools (void) | |
7509 | { | |
7510 | struct litpool_seg *lps = litpool_seg_list.next; | |
7511 | struct litpool_frag *lpf; | |
7512 | ||
7513 | for ( ; lps ; lps = lps->next ) | |
7514 | { | |
7515 | printf("litpool seg %s\n", lps->seg->name); | |
7516 | for ( lpf = lps->frag_list.next; lpf->fragP; lpf = lpf->next ) | |
7517 | { | |
7518 | fragS *litfrag = lpf->fragP->fr_next; | |
7519 | int count = 0; | |
7520 | while (litfrag && litfrag->fr_subtype != RELAX_LITERAL_POOL_END) | |
7521 | { | |
7522 | if (litfrag->fr_fix == 4) | |
7523 | count++; | |
7524 | litfrag = litfrag->fr_next; | |
7525 | } | |
7526 | printf(" %ld <%d:%d> (%d) [%d]: ", | |
7527 | lpf->addr, lpf->priority, lpf->original_priority, | |
7528 | lpf->fragP->fr_line, count); | |
7529 | //dump_frag(lpf->fragP); | |
7530 | } | |
7531 | } | |
7532 | } | |
7533 | ||
7534 | static void | |
7535 | xtensa_maybe_create_literal_pool_frag (bfd_boolean create, | |
7536 | bfd_boolean only_if_needed) | |
7537 | { | |
7538 | struct litpool_seg *lps = litpool_seg_list.next; | |
7539 | fragS *fragP; | |
7540 | struct litpool_frag *lpf; | |
7541 | bfd_boolean needed = FALSE; | |
7542 | ||
7543 | if (use_literal_section || !auto_litpools) | |
7544 | return; | |
7545 | ||
7546 | for ( ; lps ; lps = lps->next ) | |
7547 | { | |
7548 | if (lps->seg == now_seg) | |
7549 | break; | |
7550 | } | |
7551 | ||
7552 | if (lps == NULL) | |
7553 | { | |
add39d23 | 7554 | lps = XCNEW (struct litpool_seg); |
b46824bd MF |
7555 | lps->next = litpool_seg_list.next; |
7556 | litpool_seg_list.next = lps; | |
7557 | lps->seg = now_seg; | |
7558 | lps->frag_list.next = &lps->frag_list; | |
7559 | lps->frag_list.prev = &lps->frag_list; | |
947fa914 MF |
7560 | /* Put candidate literal pool at the beginning of every section, |
7561 | so that even when section starts with literal load there's a | |
7562 | literal pool available. */ | |
7563 | lps->frag_count = auto_litpool_limit; | |
b46824bd MF |
7564 | } |
7565 | ||
7566 | lps->frag_count++; | |
7567 | ||
7568 | if (create) | |
7569 | { | |
7570 | if (only_if_needed) | |
7571 | { | |
7572 | if (past_xtensa_end || !use_transform() || | |
7573 | frag_now->tc_frag_data.is_no_transform) | |
7574 | { | |
7575 | return; | |
7576 | } | |
7577 | if (auto_litpool_limit <= 0) | |
7578 | { | |
7579 | /* Don't create a litpool based only on frag count. */ | |
7580 | return; | |
7581 | } | |
7582 | else if (lps->frag_count > auto_litpool_limit) | |
7583 | { | |
7584 | needed = TRUE; | |
7585 | } | |
7586 | else | |
7587 | { | |
7588 | return; | |
7589 | } | |
7590 | } | |
7591 | else | |
7592 | { | |
7593 | needed = TRUE; | |
7594 | } | |
7595 | } | |
7596 | ||
7597 | if (needed) | |
7598 | { | |
7599 | int size = (only_if_needed) ? 3 : 0; /* Space for a "j" insn. */ | |
7600 | /* Create a potential site for a literal pool. */ | |
7601 | frag_wane (frag_now); | |
7602 | frag_new (0); | |
7603 | xtensa_set_frag_assembly_state (frag_now); | |
7604 | fragP = frag_now; | |
7605 | fragP->tc_frag_data.lit_frchain = frchain_now; | |
7606 | fragP->tc_frag_data.literal_frag = fragP; | |
7607 | frag_var (rs_machine_dependent, size, size, | |
7608 | (only_if_needed) ? | |
7609 | RELAX_LITERAL_POOL_CANDIDATE_BEGIN : | |
7610 | RELAX_LITERAL_POOL_BEGIN, | |
7611 | NULL, 0, NULL); | |
7612 | frag_now->tc_frag_data.lit_seg = now_seg; | |
7613 | frag_variant (rs_machine_dependent, 0, 0, | |
7614 | RELAX_LITERAL_POOL_END, NULL, 0, NULL); | |
7615 | xtensa_set_frag_assembly_state (frag_now); | |
7616 | } | |
7617 | else | |
7618 | { | |
7619 | /* RELAX_LITERAL_POOL_BEGIN frag is being created; | |
7620 | just record it here. */ | |
7621 | fragP = frag_now; | |
7622 | } | |
7623 | ||
325801bd | 7624 | lpf = XNEW (struct litpool_frag); |
b46824bd MF |
7625 | /* Insert at tail of circular list. */ |
7626 | lpf->addr = 0; | |
7627 | lps->frag_list.prev->next = lpf; | |
7628 | lpf->next = &lps->frag_list; | |
7629 | lpf->prev = lps->frag_list.prev; | |
7630 | lps->frag_list.prev = lpf; | |
7631 | lpf->fragP = fragP; | |
7632 | lpf->priority = (needed) ? (only_if_needed) ? 3 : 2 : 1; | |
7633 | lpf->original_priority = lpf->priority; | |
7634 | ||
7635 | lps->frag_count = 0; | |
7636 | } | |
7637 | ||
43cd72b9 | 7638 | static void |
7fa3d080 | 7639 | xtensa_cleanup_align_frags (void) |
43cd72b9 BW |
7640 | { |
7641 | frchainS *frchP; | |
c9049d30 | 7642 | asection *s; |
43cd72b9 | 7643 | |
c9049d30 AM |
7644 | for (s = stdoutput->sections; s; s = s->next) |
7645 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7646 | { | |
7647 | fragS *fragP; | |
7648 | /* Walk over all of the fragments in a subsection. */ | |
7649 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7650 | { | |
7651 | if ((fragP->fr_type == rs_align | |
7652 | || fragP->fr_type == rs_align_code | |
7653 | || (fragP->fr_type == rs_machine_dependent | |
7654 | && (fragP->fr_subtype == RELAX_DESIRE_ALIGN | |
7655 | || fragP->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET))) | |
7656 | && fragP->fr_fix == 0) | |
7657 | { | |
7658 | fragS *next = fragP->fr_next; | |
7659 | ||
7660 | while (next | |
7661 | && next->fr_fix == 0 | |
7662 | && next->fr_type == rs_machine_dependent | |
7663 | && next->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET) | |
7664 | { | |
7665 | frag_wane (next); | |
7666 | next = next->fr_next; | |
7667 | } | |
7668 | } | |
7669 | /* If we don't widen branch targets, then they | |
7670 | will be easier to align. */ | |
7671 | if (fragP->tc_frag_data.is_branch_target | |
7672 | && fragP->fr_opcode == fragP->fr_literal | |
7673 | && fragP->fr_type == rs_machine_dependent | |
7674 | && fragP->fr_subtype == RELAX_SLOTS | |
7675 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
7676 | frag_wane (fragP); | |
7677 | if (fragP->fr_type == rs_machine_dependent | |
7678 | && fragP->fr_subtype == RELAX_UNREACHABLE) | |
7679 | fragP->tc_frag_data.is_unreachable = TRUE; | |
7680 | } | |
7681 | } | |
43cd72b9 BW |
7682 | } |
7683 | ||
7684 | ||
7685 | /* Re-process all of the fragments looking to convert all of the | |
7686 | RELAX_DESIRE_ALIGN_IF_TARGET fragments. If there is a branch | |
7687 | target in the next fragment, convert this to RELAX_DESIRE_ALIGN. | |
7b1cc377 | 7688 | Otherwise, convert to a .fill 0. */ |
7fa3d080 | 7689 | |
43cd72b9 | 7690 | static void |
7fa3d080 | 7691 | xtensa_fix_target_frags (void) |
e0001a05 NC |
7692 | { |
7693 | frchainS *frchP; | |
c9049d30 | 7694 | asection *s; |
e0001a05 NC |
7695 | |
7696 | /* When this routine is called, all of the subsections are still intact | |
7697 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
7698 | for (s = stdoutput->sections; s; s = s->next) |
7699 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7700 | { | |
7701 | fragS *fragP; | |
e0001a05 | 7702 | |
c9049d30 AM |
7703 | /* Walk over all of the fragments in a subsection. */ |
7704 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7705 | { | |
7706 | if (fragP->fr_type == rs_machine_dependent | |
7707 | && fragP->fr_subtype == RELAX_DESIRE_ALIGN_IF_TARGET) | |
7708 | { | |
7709 | if (next_frag_is_branch_target (fragP)) | |
7710 | fragP->fr_subtype = RELAX_DESIRE_ALIGN; | |
7711 | else | |
7712 | frag_wane (fragP); | |
7713 | } | |
7714 | } | |
7715 | } | |
e0001a05 NC |
7716 | } |
7717 | ||
7718 | ||
7fa3d080 BW |
7719 | static bfd_boolean is_narrow_branch_guaranteed_in_range (fragS *, TInsn *); |
7720 | ||
43cd72b9 | 7721 | static void |
7fa3d080 | 7722 | xtensa_mark_narrow_branches (void) |
43cd72b9 BW |
7723 | { |
7724 | frchainS *frchP; | |
c9049d30 | 7725 | asection *s; |
43cd72b9 | 7726 | |
c9049d30 AM |
7727 | for (s = stdoutput->sections; s; s = s->next) |
7728 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7729 | { | |
7730 | fragS *fragP; | |
7731 | /* Walk over all of the fragments in a subsection. */ | |
7732 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7733 | { | |
7734 | if (fragP->fr_type == rs_machine_dependent | |
7735 | && fragP->fr_subtype == RELAX_SLOTS | |
7736 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED) | |
7737 | { | |
7738 | vliw_insn vinsn; | |
7739 | ||
7740 | vinsn_from_chars (&vinsn, fragP->fr_opcode); | |
7741 | tinsn_immed_from_frag (&vinsn.slots[0], fragP, 0); | |
7742 | ||
7743 | if (vinsn.num_slots == 1 | |
7744 | && xtensa_opcode_is_branch (xtensa_default_isa, | |
64b607e6 | 7745 | vinsn.slots[0].opcode) == 1 |
c9049d30 AM |
7746 | && xg_get_single_size (vinsn.slots[0].opcode) == 2 |
7747 | && is_narrow_branch_guaranteed_in_range (fragP, | |
7748 | &vinsn.slots[0])) | |
7749 | { | |
7750 | fragP->fr_subtype = RELAX_SLOTS; | |
7751 | fragP->tc_frag_data.slot_subtypes[0] = RELAX_NARROW; | |
7752 | fragP->tc_frag_data.is_aligning_branch = 1; | |
7753 | } | |
7754 | } | |
7755 | } | |
7756 | } | |
43cd72b9 BW |
7757 | } |
7758 | ||
7759 | ||
7760 | /* A branch is typically widened only when its target is out of | |
7761 | range. However, we would like to widen them to align a subsequent | |
7762 | branch target when possible. | |
7763 | ||
7764 | Because the branch relaxation code is so convoluted, the optimal solution | |
7765 | (combining the two cases) is difficult to get right in all circumstances. | |
7766 | We therefore go with an "almost as good" solution, where we only | |
7767 | use for alignment narrow branches that definitely will not expand to a | |
7768 | jump and a branch. These functions find and mark these cases. */ | |
7769 | ||
a67517f4 BW |
7770 | /* The range in bytes of BNEZ.N and BEQZ.N. The target operand is encoded |
7771 | as PC + 4 + imm6, where imm6 is a 6-bit immediate ranging from 0 to 63. | |
7772 | We start counting beginning with the frag after the 2-byte branch, so the | |
7773 | maximum offset is (4 - 2) + 63 = 65. */ | |
7774 | #define MAX_IMMED6 65 | |
43cd72b9 | 7775 | |
d77b99c9 | 7776 | static offsetT unrelaxed_frag_max_size (fragS *); |
7fa3d080 | 7777 | |
43cd72b9 | 7778 | static bfd_boolean |
7fa3d080 | 7779 | is_narrow_branch_guaranteed_in_range (fragS *fragP, TInsn *tinsn) |
43cd72b9 | 7780 | { |
91d6fa6a NC |
7781 | const expressionS *exp = &tinsn->tok[1]; |
7782 | symbolS *symbolP = exp->X_add_symbol; | |
7783 | offsetT max_distance = exp->X_add_number; | |
e7da6241 BW |
7784 | fragS *target_frag; |
7785 | ||
91d6fa6a | 7786 | if (exp->X_op != O_symbol) |
e7da6241 BW |
7787 | return FALSE; |
7788 | ||
7789 | target_frag = symbol_get_frag (symbolP); | |
7790 | ||
43cd72b9 BW |
7791 | max_distance += (S_GET_VALUE (symbolP) - target_frag->fr_address); |
7792 | if (is_branch_jmp_to_next (tinsn, fragP)) | |
7793 | return FALSE; | |
7794 | ||
7795 | /* The branch doesn't branch over it's own frag, | |
7796 | but over the subsequent ones. */ | |
7797 | fragP = fragP->fr_next; | |
7798 | while (fragP != NULL && fragP != target_frag && max_distance <= MAX_IMMED6) | |
7799 | { | |
7800 | max_distance += unrelaxed_frag_max_size (fragP); | |
7801 | fragP = fragP->fr_next; | |
7802 | } | |
7803 | if (max_distance <= MAX_IMMED6 && fragP == target_frag) | |
7804 | return TRUE; | |
e0001a05 NC |
7805 | return FALSE; |
7806 | } | |
7807 | ||
7808 | ||
43cd72b9 | 7809 | static void |
7fa3d080 | 7810 | xtensa_mark_zcl_first_insns (void) |
43cd72b9 BW |
7811 | { |
7812 | frchainS *frchP; | |
c9049d30 | 7813 | asection *s; |
43cd72b9 | 7814 | |
c9049d30 AM |
7815 | for (s = stdoutput->sections; s; s = s->next) |
7816 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7817 | { | |
7818 | fragS *fragP; | |
7819 | /* Walk over all of the fragments in a subsection. */ | |
7820 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7821 | { | |
7822 | if (fragP->fr_type == rs_machine_dependent | |
7823 | && (fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE | |
7824 | || fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE)) | |
7825 | { | |
7826 | /* Find the loop frag. */ | |
3a1e9c4a | 7827 | fragS *loop_frag = next_non_empty_frag (fragP); |
c9049d30 | 7828 | /* Find the first insn frag. */ |
3a1e9c4a SA |
7829 | fragS *targ_frag = next_non_empty_frag (loop_frag); |
7830 | ||
7831 | /* Handle a corner case that comes up in hardware | |
7832 | diagnostics. The original assembly looks like this: | |
3739860c | 7833 | |
3a1e9c4a SA |
7834 | loop aX, LabelA |
7835 | <empty_frag>--not found by next_non_empty_frag | |
7836 | loop aY, LabelB | |
7837 | ||
7838 | Depending on the start address, the assembler may or | |
7839 | may not change it to look something like this: | |
7840 | ||
7841 | loop aX, LabelA | |
7842 | nop--frag isn't empty anymore | |
7843 | loop aY, LabelB | |
7844 | ||
7845 | So set up to check the alignment of the nop if it | |
7846 | exists */ | |
7847 | while (loop_frag != targ_frag) | |
7848 | { | |
7849 | if (loop_frag->fr_type == rs_machine_dependent | |
7850 | && (loop_frag->fr_subtype == RELAX_ALIGN_NEXT_OPCODE | |
3739860c | 7851 | || loop_frag->fr_subtype |
3a1e9c4a SA |
7852 | == RELAX_CHECK_ALIGN_NEXT_OPCODE)) |
7853 | targ_frag = loop_frag; | |
7854 | else | |
7855 | loop_frag = loop_frag->fr_next; | |
7856 | } | |
c9049d30 AM |
7857 | |
7858 | /* Of course, sometimes (mostly for toy test cases) a | |
7859 | zero-cost loop instruction is the last in a section. */ | |
7860 | if (targ_frag) | |
7861 | { | |
7862 | targ_frag->tc_frag_data.is_first_loop_insn = TRUE; | |
7863 | /* Do not widen a frag that is the first instruction of a | |
7864 | zero-cost loop. It makes that loop harder to align. */ | |
7865 | if (targ_frag->fr_type == rs_machine_dependent | |
7866 | && targ_frag->fr_subtype == RELAX_SLOTS | |
7867 | && (targ_frag->tc_frag_data.slot_subtypes[0] | |
7868 | == RELAX_NARROW)) | |
7869 | { | |
7870 | if (targ_frag->tc_frag_data.is_aligning_branch) | |
7871 | targ_frag->tc_frag_data.slot_subtypes[0] = RELAX_IMMED; | |
7872 | else | |
7873 | { | |
7874 | frag_wane (targ_frag); | |
7875 | targ_frag->tc_frag_data.slot_subtypes[0] = 0; | |
7876 | } | |
7877 | } | |
7878 | } | |
7879 | if (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE) | |
7880 | frag_wane (fragP); | |
7881 | } | |
7882 | } | |
7883 | } | |
43cd72b9 BW |
7884 | } |
7885 | ||
7886 | ||
fb227da0 BW |
7887 | /* When a difference-of-symbols expression is encoded as a uleb128 or |
7888 | sleb128 value, the linker is unable to adjust that value to account for | |
7889 | link-time relaxation. Mark all the code between such symbols so that | |
7890 | its size cannot be changed by linker relaxation. */ | |
3739860c | 7891 | |
6a7eedfe BW |
7892 | static void |
7893 | xtensa_mark_difference_of_two_symbols (void) | |
7894 | { | |
7895 | symbolS *expr_sym; | |
7896 | ||
3739860c | 7897 | for (expr_sym = expr_symbols; expr_sym; |
6a7eedfe BW |
7898 | expr_sym = symbol_get_tc (expr_sym)->next_expr_symbol) |
7899 | { | |
91d6fa6a | 7900 | expressionS *exp = symbol_get_value_expression (expr_sym); |
6a7eedfe | 7901 | |
91d6fa6a | 7902 | if (exp->X_op == O_subtract) |
6a7eedfe | 7903 | { |
91d6fa6a NC |
7904 | symbolS *left = exp->X_add_symbol; |
7905 | symbolS *right = exp->X_op_symbol; | |
3739860c | 7906 | |
6a7eedfe BW |
7907 | /* Difference of two symbols not in the same section |
7908 | are handled with relocations in the linker. */ | |
7909 | if (S_GET_SEGMENT (left) == S_GET_SEGMENT (right)) | |
7910 | { | |
7911 | fragS *start; | |
7912 | fragS *end; | |
983f90e3 | 7913 | fragS *walk; |
6a7eedfe | 7914 | |
3739860c | 7915 | if (symbol_get_frag (left)->fr_address |
6a7eedfe BW |
7916 | <= symbol_get_frag (right)->fr_address) |
7917 | { | |
7918 | start = symbol_get_frag (left); | |
7919 | end = symbol_get_frag (right); | |
7920 | } | |
7921 | else | |
7922 | { | |
7923 | start = symbol_get_frag (right); | |
7924 | end = symbol_get_frag (left); | |
7925 | } | |
983f90e3 SA |
7926 | |
7927 | if (start->tc_frag_data.no_transform_end != NULL) | |
7928 | walk = start->tc_frag_data.no_transform_end; | |
7929 | else | |
7930 | walk = start; | |
3739860c | 7931 | do |
6a7eedfe | 7932 | { |
983f90e3 SA |
7933 | walk->tc_frag_data.is_no_transform = 1; |
7934 | walk = walk->fr_next; | |
6a7eedfe | 7935 | } |
983f90e3 SA |
7936 | while (walk && walk->fr_address < end->fr_address); |
7937 | ||
7938 | start->tc_frag_data.no_transform_end = walk; | |
6a7eedfe BW |
7939 | } |
7940 | } | |
7941 | } | |
7942 | } | |
7943 | ||
7944 | ||
e0001a05 NC |
7945 | /* Re-process all of the fragments looking to convert all of the |
7946 | RELAX_ADD_NOP_IF_A0_B_RETW. If the next instruction is a | |
7947 | conditional branch or a retw/retw.n, convert this frag to one that | |
7948 | will generate a NOP. In any case close it off with a .fill 0. */ | |
7949 | ||
7fa3d080 BW |
7950 | static bfd_boolean next_instrs_are_b_retw (fragS *); |
7951 | ||
e0001a05 | 7952 | static void |
7fa3d080 | 7953 | xtensa_fix_a0_b_retw_frags (void) |
e0001a05 NC |
7954 | { |
7955 | frchainS *frchP; | |
c9049d30 | 7956 | asection *s; |
e0001a05 NC |
7957 | |
7958 | /* When this routine is called, all of the subsections are still intact | |
7959 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
7960 | for (s = stdoutput->sections; s; s = s->next) |
7961 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
7962 | { | |
7963 | fragS *fragP; | |
e0001a05 | 7964 | |
c9049d30 AM |
7965 | /* Walk over all of the fragments in a subsection. */ |
7966 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
7967 | { | |
7968 | if (fragP->fr_type == rs_machine_dependent | |
7969 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_A0_B_RETW) | |
7970 | { | |
7971 | if (next_instrs_are_b_retw (fragP)) | |
7972 | { | |
7973 | if (fragP->tc_frag_data.is_no_transform) | |
7974 | as_bad (_("instruction sequence (write a0, branch, retw) may trigger hardware errata")); | |
7975 | else | |
7976 | relax_frag_add_nop (fragP); | |
7977 | } | |
7978 | frag_wane (fragP); | |
7979 | } | |
7980 | } | |
7981 | } | |
e0001a05 NC |
7982 | } |
7983 | ||
7984 | ||
7fa3d080 BW |
7985 | static bfd_boolean |
7986 | next_instrs_are_b_retw (fragS *fragP) | |
e0001a05 NC |
7987 | { |
7988 | xtensa_opcode opcode; | |
43cd72b9 | 7989 | xtensa_format fmt; |
e0001a05 NC |
7990 | const fragS *next_fragP = next_non_empty_frag (fragP); |
7991 | static xtensa_insnbuf insnbuf = NULL; | |
43cd72b9 | 7992 | static xtensa_insnbuf slotbuf = NULL; |
e0001a05 NC |
7993 | xtensa_isa isa = xtensa_default_isa; |
7994 | int offset = 0; | |
43cd72b9 BW |
7995 | int slot; |
7996 | bfd_boolean branch_seen = FALSE; | |
e0001a05 NC |
7997 | |
7998 | if (!insnbuf) | |
43cd72b9 BW |
7999 | { |
8000 | insnbuf = xtensa_insnbuf_alloc (isa); | |
8001 | slotbuf = xtensa_insnbuf_alloc (isa); | |
8002 | } | |
e0001a05 NC |
8003 | |
8004 | if (next_fragP == NULL) | |
8005 | return FALSE; | |
8006 | ||
8007 | /* Check for the conditional branch. */ | |
d77b99c9 BW |
8008 | xtensa_insnbuf_from_chars |
8009 | (isa, insnbuf, (unsigned char *) &next_fragP->fr_literal[offset], 0); | |
43cd72b9 BW |
8010 | fmt = xtensa_format_decode (isa, insnbuf); |
8011 | if (fmt == XTENSA_UNDEFINED) | |
8012 | return FALSE; | |
8013 | ||
8014 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
8015 | { | |
8016 | xtensa_format_get_slot (isa, fmt, slot, insnbuf, slotbuf); | |
8017 | opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
8018 | ||
8019 | branch_seen = (branch_seen | |
8020 | || xtensa_opcode_is_branch (isa, opcode) == 1); | |
8021 | } | |
e0001a05 | 8022 | |
43cd72b9 | 8023 | if (!branch_seen) |
e0001a05 NC |
8024 | return FALSE; |
8025 | ||
43cd72b9 | 8026 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
8027 | if (offset == next_fragP->fr_fix) |
8028 | { | |
8029 | next_fragP = next_non_empty_frag (next_fragP); | |
8030 | offset = 0; | |
8031 | } | |
43cd72b9 | 8032 | |
e0001a05 NC |
8033 | if (next_fragP == NULL) |
8034 | return FALSE; | |
8035 | ||
8036 | /* Check for the retw/retw.n. */ | |
d77b99c9 BW |
8037 | xtensa_insnbuf_from_chars |
8038 | (isa, insnbuf, (unsigned char *) &next_fragP->fr_literal[offset], 0); | |
43cd72b9 BW |
8039 | fmt = xtensa_format_decode (isa, insnbuf); |
8040 | ||
8041 | /* Because RETW[.N] is not bundleable, a VLIW bundle here means that we | |
8042 | have no problems. */ | |
8043 | if (fmt == XTENSA_UNDEFINED | |
8044 | || xtensa_format_num_slots (isa, fmt) != 1) | |
8045 | return FALSE; | |
8046 | ||
8047 | xtensa_format_get_slot (isa, fmt, 0, insnbuf, slotbuf); | |
8048 | opcode = xtensa_opcode_decode (isa, fmt, 0, slotbuf); | |
e0001a05 | 8049 | |
b08b5071 | 8050 | if (opcode == xtensa_retw_opcode || opcode == xtensa_retw_n_opcode) |
e0001a05 | 8051 | return TRUE; |
43cd72b9 | 8052 | |
e0001a05 NC |
8053 | return FALSE; |
8054 | } | |
8055 | ||
8056 | ||
8057 | /* Re-process all of the fragments looking to convert all of the | |
8058 | RELAX_ADD_NOP_IF_PRE_LOOP_END. If there is one instruction and a | |
8059 | loop end label, convert this frag to one that will generate a NOP. | |
8060 | In any case close it off with a .fill 0. */ | |
8061 | ||
7fa3d080 BW |
8062 | static bfd_boolean next_instr_is_loop_end (fragS *); |
8063 | ||
e0001a05 | 8064 | static void |
7fa3d080 | 8065 | xtensa_fix_b_j_loop_end_frags (void) |
e0001a05 NC |
8066 | { |
8067 | frchainS *frchP; | |
c9049d30 | 8068 | asection *s; |
e0001a05 NC |
8069 | |
8070 | /* When this routine is called, all of the subsections are still intact | |
8071 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
8072 | for (s = stdoutput->sections; s; s = s->next) |
8073 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8074 | { | |
8075 | fragS *fragP; | |
e0001a05 | 8076 | |
c9049d30 AM |
8077 | /* Walk over all of the fragments in a subsection. */ |
8078 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8079 | { | |
8080 | if (fragP->fr_type == rs_machine_dependent | |
8081 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_PRE_LOOP_END) | |
8082 | { | |
8083 | if (next_instr_is_loop_end (fragP)) | |
8084 | { | |
8085 | if (fragP->tc_frag_data.is_no_transform) | |
8086 | as_bad (_("branching or jumping to a loop end may trigger hardware errata")); | |
8087 | else | |
8088 | relax_frag_add_nop (fragP); | |
8089 | } | |
8090 | frag_wane (fragP); | |
8091 | } | |
8092 | } | |
8093 | } | |
e0001a05 NC |
8094 | } |
8095 | ||
8096 | ||
7fa3d080 BW |
8097 | static bfd_boolean |
8098 | next_instr_is_loop_end (fragS *fragP) | |
e0001a05 NC |
8099 | { |
8100 | const fragS *next_fragP; | |
8101 | ||
8102 | if (next_frag_is_loop_target (fragP)) | |
8103 | return FALSE; | |
8104 | ||
8105 | next_fragP = next_non_empty_frag (fragP); | |
8106 | if (next_fragP == NULL) | |
8107 | return FALSE; | |
8108 | ||
8109 | if (!next_frag_is_loop_target (next_fragP)) | |
8110 | return FALSE; | |
8111 | ||
8112 | /* If the size is >= 3 then there is more than one instruction here. | |
8113 | The hardware bug will not fire. */ | |
8114 | if (next_fragP->fr_fix > 3) | |
8115 | return FALSE; | |
8116 | ||
8117 | return TRUE; | |
8118 | } | |
8119 | ||
8120 | ||
8121 | /* Re-process all of the fragments looking to convert all of the | |
8122 | RELAX_ADD_NOP_IF_CLOSE_LOOP_END. If there is an loop end that is | |
8123 | not MY loop's loop end within 12 bytes, add enough nops here to | |
8124 | make it at least 12 bytes away. In any case close it off with a | |
8125 | .fill 0. */ | |
8126 | ||
d77b99c9 | 8127 | static offsetT min_bytes_to_other_loop_end |
05d58145 | 8128 | (fragS *, fragS *, offsetT); |
7fa3d080 | 8129 | |
e0001a05 | 8130 | static void |
7fa3d080 | 8131 | xtensa_fix_close_loop_end_frags (void) |
e0001a05 NC |
8132 | { |
8133 | frchainS *frchP; | |
c9049d30 | 8134 | asection *s; |
e0001a05 NC |
8135 | |
8136 | /* When this routine is called, all of the subsections are still intact | |
8137 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
8138 | for (s = stdoutput->sections; s; s = s->next) |
8139 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8140 | { | |
8141 | fragS *fragP; | |
e0001a05 | 8142 | |
c9049d30 | 8143 | fragS *current_target = NULL; |
e0001a05 | 8144 | |
c9049d30 AM |
8145 | /* Walk over all of the fragments in a subsection. */ |
8146 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8147 | { | |
8148 | if (fragP->fr_type == rs_machine_dependent | |
8149 | && ((fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE) | |
8150 | || (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE))) | |
05d58145 | 8151 | current_target = symbol_get_frag (fragP->fr_symbol); |
e0001a05 | 8152 | |
c9049d30 AM |
8153 | if (current_target |
8154 | && fragP->fr_type == rs_machine_dependent | |
8155 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_CLOSE_LOOP_END) | |
8156 | { | |
8157 | offsetT min_bytes; | |
8158 | int bytes_added = 0; | |
e0001a05 NC |
8159 | |
8160 | #define REQUIRED_LOOP_DIVIDING_BYTES 12 | |
c9049d30 AM |
8161 | /* Max out at 12. */ |
8162 | min_bytes = min_bytes_to_other_loop_end | |
8163 | (fragP->fr_next, current_target, REQUIRED_LOOP_DIVIDING_BYTES); | |
8164 | ||
8165 | if (min_bytes < REQUIRED_LOOP_DIVIDING_BYTES) | |
8166 | { | |
8167 | if (fragP->tc_frag_data.is_no_transform) | |
8168 | as_bad (_("loop end too close to another loop end may trigger hardware errata")); | |
8169 | else | |
8170 | { | |
8171 | while (min_bytes + bytes_added | |
8172 | < REQUIRED_LOOP_DIVIDING_BYTES) | |
8173 | { | |
8174 | int length = 3; | |
8175 | ||
8176 | if (fragP->fr_var < length) | |
8177 | as_fatal (_("fr_var %lu < length %d"), | |
8178 | (long) fragP->fr_var, length); | |
8179 | else | |
8180 | { | |
8181 | assemble_nop (length, | |
8182 | fragP->fr_literal + fragP->fr_fix); | |
8183 | fragP->fr_fix += length; | |
8184 | fragP->fr_var -= length; | |
8185 | } | |
8186 | bytes_added += length; | |
8187 | } | |
8188 | } | |
8189 | } | |
8190 | frag_wane (fragP); | |
8191 | } | |
9c2799c2 | 8192 | gas_assert (fragP->fr_type != rs_machine_dependent |
c9049d30 AM |
8193 | || fragP->fr_subtype != RELAX_ADD_NOP_IF_CLOSE_LOOP_END); |
8194 | } | |
8195 | } | |
e0001a05 NC |
8196 | } |
8197 | ||
8198 | ||
d77b99c9 | 8199 | static offsetT unrelaxed_frag_min_size (fragS *); |
7fa3d080 | 8200 | |
d77b99c9 | 8201 | static offsetT |
7fa3d080 BW |
8202 | min_bytes_to_other_loop_end (fragS *fragP, |
8203 | fragS *current_target, | |
d77b99c9 | 8204 | offsetT max_size) |
e0001a05 | 8205 | { |
d77b99c9 | 8206 | offsetT offset = 0; |
e0001a05 NC |
8207 | fragS *current_fragP; |
8208 | ||
8209 | for (current_fragP = fragP; | |
8210 | current_fragP; | |
8211 | current_fragP = current_fragP->fr_next) | |
8212 | { | |
8213 | if (current_fragP->tc_frag_data.is_loop_target | |
8214 | && current_fragP != current_target) | |
05d58145 | 8215 | return offset; |
e0001a05 NC |
8216 | |
8217 | offset += unrelaxed_frag_min_size (current_fragP); | |
8218 | ||
05d58145 | 8219 | if (offset >= max_size) |
e0001a05 NC |
8220 | return max_size; |
8221 | } | |
8222 | return max_size; | |
8223 | } | |
8224 | ||
8225 | ||
d77b99c9 | 8226 | static offsetT |
7fa3d080 | 8227 | unrelaxed_frag_min_size (fragS *fragP) |
e0001a05 | 8228 | { |
d77b99c9 | 8229 | offsetT size = fragP->fr_fix; |
e0001a05 | 8230 | |
d77b99c9 | 8231 | /* Add fill size. */ |
e0001a05 NC |
8232 | if (fragP->fr_type == rs_fill) |
8233 | size += fragP->fr_offset; | |
8234 | ||
8235 | return size; | |
8236 | } | |
8237 | ||
8238 | ||
d77b99c9 | 8239 | static offsetT |
7fa3d080 | 8240 | unrelaxed_frag_max_size (fragS *fragP) |
43cd72b9 | 8241 | { |
d77b99c9 | 8242 | offsetT size = fragP->fr_fix; |
43cd72b9 BW |
8243 | switch (fragP->fr_type) |
8244 | { | |
8245 | case 0: | |
c138bc38 | 8246 | /* Empty frags created by the obstack allocation scheme |
43cd72b9 BW |
8247 | end up with type 0. */ |
8248 | break; | |
8249 | case rs_fill: | |
8250 | case rs_org: | |
8251 | case rs_space: | |
8252 | size += fragP->fr_offset; | |
8253 | break; | |
8254 | case rs_align: | |
8255 | case rs_align_code: | |
8256 | case rs_align_test: | |
8257 | case rs_leb128: | |
8258 | case rs_cfa: | |
8259 | case rs_dwarf2dbg: | |
8260 | /* No further adjustments needed. */ | |
8261 | break; | |
8262 | case rs_machine_dependent: | |
8263 | if (fragP->fr_subtype != RELAX_DESIRE_ALIGN) | |
8264 | size += fragP->fr_var; | |
8265 | break; | |
8266 | default: | |
8267 | /* We had darn well better know how big it is. */ | |
9c2799c2 | 8268 | gas_assert (0); |
43cd72b9 BW |
8269 | break; |
8270 | } | |
8271 | ||
8272 | return size; | |
8273 | } | |
8274 | ||
8275 | ||
e0001a05 NC |
8276 | /* Re-process all of the fragments looking to convert all |
8277 | of the RELAX_ADD_NOP_IF_SHORT_LOOP. If: | |
8278 | ||
8279 | A) | |
8280 | 1) the instruction size count to the loop end label | |
8281 | is too short (<= 2 instructions), | |
8282 | 2) loop has a jump or branch in it | |
8283 | ||
8284 | or B) | |
43cd72b9 | 8285 | 1) workaround_all_short_loops is TRUE |
e0001a05 NC |
8286 | 2) The generating loop was a 'loopgtz' or 'loopnez' |
8287 | 3) the instruction size count to the loop end label is too short | |
8288 | (<= 2 instructions) | |
8289 | then convert this frag (and maybe the next one) to generate a NOP. | |
8290 | In any case close it off with a .fill 0. */ | |
8291 | ||
d77b99c9 | 8292 | static int count_insns_to_loop_end (fragS *, bfd_boolean, int); |
7fa3d080 BW |
8293 | static bfd_boolean branch_before_loop_end (fragS *); |
8294 | ||
e0001a05 | 8295 | static void |
7fa3d080 | 8296 | xtensa_fix_short_loop_frags (void) |
e0001a05 NC |
8297 | { |
8298 | frchainS *frchP; | |
c9049d30 | 8299 | asection *s; |
e0001a05 NC |
8300 | |
8301 | /* When this routine is called, all of the subsections are still intact | |
8302 | so we walk over subsections instead of sections. */ | |
c9049d30 AM |
8303 | for (s = stdoutput->sections; s; s = s->next) |
8304 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8305 | { | |
8306 | fragS *fragP; | |
c9049d30 | 8307 | xtensa_opcode current_opcode = XTENSA_UNDEFINED; |
e0001a05 | 8308 | |
c9049d30 AM |
8309 | /* Walk over all of the fragments in a subsection. */ |
8310 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8311 | { | |
8312 | if (fragP->fr_type == rs_machine_dependent | |
8313 | && ((fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE) | |
8314 | || (fragP->fr_subtype == RELAX_CHECK_ALIGN_NEXT_OPCODE))) | |
8315 | { | |
8316 | TInsn t_insn; | |
8317 | fragS *loop_frag = next_non_empty_frag (fragP); | |
8318 | tinsn_from_chars (&t_insn, loop_frag->fr_opcode, 0); | |
c9049d30 | 8319 | current_opcode = t_insn.opcode; |
9c2799c2 | 8320 | gas_assert (xtensa_opcode_is_loop (xtensa_default_isa, |
64b607e6 | 8321 | current_opcode) == 1); |
c9049d30 | 8322 | } |
e0001a05 | 8323 | |
c9049d30 AM |
8324 | if (fragP->fr_type == rs_machine_dependent |
8325 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_SHORT_LOOP) | |
8326 | { | |
8327 | if (count_insns_to_loop_end (fragP->fr_next, TRUE, 3) < 3 | |
8328 | && (branch_before_loop_end (fragP->fr_next) | |
8329 | || (workaround_all_short_loops | |
8330 | && current_opcode != XTENSA_UNDEFINED | |
8331 | && current_opcode != xtensa_loop_opcode))) | |
8332 | { | |
8333 | if (fragP->tc_frag_data.is_no_transform) | |
8334 | as_bad (_("loop containing less than three instructions may trigger hardware errata")); | |
8335 | else | |
8336 | relax_frag_add_nop (fragP); | |
8337 | } | |
8338 | frag_wane (fragP); | |
8339 | } | |
8340 | } | |
8341 | } | |
e0001a05 NC |
8342 | } |
8343 | ||
8344 | ||
d77b99c9 | 8345 | static int unrelaxed_frag_min_insn_count (fragS *); |
7fa3d080 | 8346 | |
d77b99c9 | 8347 | static int |
7fa3d080 BW |
8348 | count_insns_to_loop_end (fragS *base_fragP, |
8349 | bfd_boolean count_relax_add, | |
d77b99c9 | 8350 | int max_count) |
e0001a05 NC |
8351 | { |
8352 | fragS *fragP = NULL; | |
d77b99c9 | 8353 | int insn_count = 0; |
e0001a05 NC |
8354 | |
8355 | fragP = base_fragP; | |
8356 | ||
8357 | for (; fragP && !fragP->tc_frag_data.is_loop_target; fragP = fragP->fr_next) | |
8358 | { | |
8359 | insn_count += unrelaxed_frag_min_insn_count (fragP); | |
8360 | if (insn_count >= max_count) | |
8361 | return max_count; | |
8362 | ||
8363 | if (count_relax_add) | |
8364 | { | |
8365 | if (fragP->fr_type == rs_machine_dependent | |
8366 | && fragP->fr_subtype == RELAX_ADD_NOP_IF_SHORT_LOOP) | |
8367 | { | |
8368 | /* In order to add the appropriate number of | |
8369 | NOPs, we count an instruction for downstream | |
8370 | occurrences. */ | |
8371 | insn_count++; | |
8372 | if (insn_count >= max_count) | |
8373 | return max_count; | |
8374 | } | |
8375 | } | |
8376 | } | |
8377 | return insn_count; | |
8378 | } | |
8379 | ||
8380 | ||
d77b99c9 | 8381 | static int |
7fa3d080 | 8382 | unrelaxed_frag_min_insn_count (fragS *fragP) |
e0001a05 | 8383 | { |
43cd72b9 BW |
8384 | xtensa_isa isa = xtensa_default_isa; |
8385 | static xtensa_insnbuf insnbuf = NULL; | |
d77b99c9 | 8386 | int insn_count = 0; |
e0001a05 NC |
8387 | int offset = 0; |
8388 | ||
8389 | if (!fragP->tc_frag_data.is_insn) | |
8390 | return insn_count; | |
8391 | ||
43cd72b9 BW |
8392 | if (!insnbuf) |
8393 | insnbuf = xtensa_insnbuf_alloc (isa); | |
8394 | ||
e0001a05 NC |
8395 | /* Decode the fixed instructions. */ |
8396 | while (offset < fragP->fr_fix) | |
8397 | { | |
43cd72b9 BW |
8398 | xtensa_format fmt; |
8399 | ||
d77b99c9 BW |
8400 | xtensa_insnbuf_from_chars |
8401 | (isa, insnbuf, (unsigned char *) fragP->fr_literal + offset, 0); | |
43cd72b9 BW |
8402 | fmt = xtensa_format_decode (isa, insnbuf); |
8403 | ||
8404 | if (fmt == XTENSA_UNDEFINED) | |
e0001a05 NC |
8405 | { |
8406 | as_fatal (_("undecodable instruction in instruction frag")); | |
8407 | return insn_count; | |
8408 | } | |
43cd72b9 | 8409 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
8410 | insn_count++; |
8411 | } | |
8412 | ||
8413 | return insn_count; | |
8414 | } | |
8415 | ||
8416 | ||
7fa3d080 BW |
8417 | static bfd_boolean unrelaxed_frag_has_b_j (fragS *); |
8418 | ||
43cd72b9 | 8419 | static bfd_boolean |
7fa3d080 | 8420 | branch_before_loop_end (fragS *base_fragP) |
e0001a05 NC |
8421 | { |
8422 | fragS *fragP; | |
8423 | ||
8424 | for (fragP = base_fragP; | |
8425 | fragP && !fragP->tc_frag_data.is_loop_target; | |
8426 | fragP = fragP->fr_next) | |
8427 | { | |
8428 | if (unrelaxed_frag_has_b_j (fragP)) | |
8429 | return TRUE; | |
8430 | } | |
8431 | return FALSE; | |
8432 | } | |
8433 | ||
8434 | ||
43cd72b9 | 8435 | static bfd_boolean |
7fa3d080 | 8436 | unrelaxed_frag_has_b_j (fragS *fragP) |
e0001a05 | 8437 | { |
43cd72b9 BW |
8438 | static xtensa_insnbuf insnbuf = NULL; |
8439 | xtensa_isa isa = xtensa_default_isa; | |
e0001a05 NC |
8440 | int offset = 0; |
8441 | ||
8442 | if (!fragP->tc_frag_data.is_insn) | |
8443 | return FALSE; | |
8444 | ||
43cd72b9 BW |
8445 | if (!insnbuf) |
8446 | insnbuf = xtensa_insnbuf_alloc (isa); | |
8447 | ||
e0001a05 NC |
8448 | /* Decode the fixed instructions. */ |
8449 | while (offset < fragP->fr_fix) | |
8450 | { | |
43cd72b9 BW |
8451 | xtensa_format fmt; |
8452 | int slot; | |
8453 | ||
d77b99c9 BW |
8454 | xtensa_insnbuf_from_chars |
8455 | (isa, insnbuf, (unsigned char *) fragP->fr_literal + offset, 0); | |
43cd72b9 BW |
8456 | fmt = xtensa_format_decode (isa, insnbuf); |
8457 | if (fmt == XTENSA_UNDEFINED) | |
8458 | return FALSE; | |
8459 | ||
8460 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
e0001a05 | 8461 | { |
43cd72b9 BW |
8462 | xtensa_opcode opcode = |
8463 | get_opcode_from_buf (fragP->fr_literal + offset, slot); | |
8464 | if (xtensa_opcode_is_branch (isa, opcode) == 1 | |
8465 | || xtensa_opcode_is_jump (isa, opcode) == 1) | |
8466 | return TRUE; | |
e0001a05 | 8467 | } |
43cd72b9 | 8468 | offset += xtensa_format_length (isa, fmt); |
e0001a05 NC |
8469 | } |
8470 | return FALSE; | |
8471 | } | |
8472 | ||
8473 | ||
8474 | /* Checks to be made after initial assembly but before relaxation. */ | |
8475 | ||
7fa3d080 BW |
8476 | static bfd_boolean is_empty_loop (const TInsn *, fragS *); |
8477 | static bfd_boolean is_local_forward_loop (const TInsn *, fragS *); | |
8478 | ||
e0001a05 | 8479 | static void |
7fa3d080 | 8480 | xtensa_sanity_check (void) |
e0001a05 | 8481 | { |
3b4dbbbf | 8482 | const char *file_name; |
d77b99c9 | 8483 | unsigned line; |
e0001a05 | 8484 | frchainS *frchP; |
c9049d30 | 8485 | asection *s; |
e0001a05 | 8486 | |
3b4dbbbf | 8487 | file_name = as_where (&line); |
c9049d30 AM |
8488 | for (s = stdoutput->sections; s; s = s->next) |
8489 | for (frchP = seg_info (s)->frchainP; frchP; frchP = frchP->frch_next) | |
8490 | { | |
8491 | fragS *fragP; | |
e0001a05 | 8492 | |
c9049d30 AM |
8493 | /* Walk over all of the fragments in a subsection. */ |
8494 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
8495 | { | |
c9049d30 | 8496 | if (fragP->fr_type == rs_machine_dependent |
3739860c | 8497 | && fragP->fr_subtype == RELAX_SLOTS |
a7284bf1 | 8498 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_IMMED) |
c9049d30 AM |
8499 | { |
8500 | static xtensa_insnbuf insnbuf = NULL; | |
8501 | TInsn t_insn; | |
8502 | ||
8503 | if (fragP->fr_opcode != NULL) | |
8504 | { | |
8505 | if (!insnbuf) | |
8506 | insnbuf = xtensa_insnbuf_alloc (xtensa_default_isa); | |
8507 | tinsn_from_chars (&t_insn, fragP->fr_opcode, 0); | |
8508 | tinsn_immed_from_frag (&t_insn, fragP, 0); | |
8509 | ||
8510 | if (xtensa_opcode_is_loop (xtensa_default_isa, | |
8511 | t_insn.opcode) == 1) | |
8512 | { | |
8513 | if (is_empty_loop (&t_insn, fragP)) | |
8514 | { | |
8515 | new_logical_line (fragP->fr_file, fragP->fr_line); | |
8516 | as_bad (_("invalid empty loop")); | |
8517 | } | |
8518 | if (!is_local_forward_loop (&t_insn, fragP)) | |
8519 | { | |
8520 | new_logical_line (fragP->fr_file, fragP->fr_line); | |
8521 | as_bad (_("loop target does not follow " | |
8522 | "loop instruction in section")); | |
8523 | } | |
8524 | } | |
8525 | } | |
8526 | } | |
8527 | } | |
8528 | } | |
e0001a05 NC |
8529 | new_logical_line (file_name, line); |
8530 | } | |
8531 | ||
8532 | ||
8533 | #define LOOP_IMMED_OPN 1 | |
8534 | ||
43cd72b9 | 8535 | /* Return TRUE if the loop target is the next non-zero fragment. */ |
e0001a05 | 8536 | |
7fa3d080 BW |
8537 | static bfd_boolean |
8538 | is_empty_loop (const TInsn *insn, fragS *fragP) | |
e0001a05 | 8539 | { |
91d6fa6a | 8540 | const expressionS *exp; |
e0001a05 NC |
8541 | symbolS *symbolP; |
8542 | fragS *next_fragP; | |
8543 | ||
8544 | if (insn->insn_type != ITYPE_INSN) | |
8545 | return FALSE; | |
8546 | ||
43cd72b9 | 8547 | if (xtensa_opcode_is_loop (xtensa_default_isa, insn->opcode) != 1) |
e0001a05 NC |
8548 | return FALSE; |
8549 | ||
8550 | if (insn->ntok <= LOOP_IMMED_OPN) | |
8551 | return FALSE; | |
8552 | ||
91d6fa6a | 8553 | exp = &insn->tok[LOOP_IMMED_OPN]; |
e0001a05 | 8554 | |
91d6fa6a | 8555 | if (exp->X_op != O_symbol) |
e0001a05 NC |
8556 | return FALSE; |
8557 | ||
91d6fa6a | 8558 | symbolP = exp->X_add_symbol; |
e0001a05 NC |
8559 | if (!symbolP) |
8560 | return FALSE; | |
8561 | ||
8562 | if (symbol_get_frag (symbolP) == NULL) | |
8563 | return FALSE; | |
8564 | ||
8565 | if (S_GET_VALUE (symbolP) != 0) | |
8566 | return FALSE; | |
8567 | ||
8568 | /* Walk through the zero-size fragments from this one. If we find | |
8569 | the target fragment, then this is a zero-size loop. */ | |
43cd72b9 | 8570 | |
e0001a05 NC |
8571 | for (next_fragP = fragP->fr_next; |
8572 | next_fragP != NULL; | |
8573 | next_fragP = next_fragP->fr_next) | |
8574 | { | |
8575 | if (next_fragP == symbol_get_frag (symbolP)) | |
8576 | return TRUE; | |
8577 | if (next_fragP->fr_fix != 0) | |
8578 | return FALSE; | |
8579 | } | |
8580 | return FALSE; | |
8581 | } | |
8582 | ||
8583 | ||
7fa3d080 BW |
8584 | static bfd_boolean |
8585 | is_local_forward_loop (const TInsn *insn, fragS *fragP) | |
e0001a05 | 8586 | { |
91d6fa6a | 8587 | const expressionS *exp; |
e0001a05 NC |
8588 | symbolS *symbolP; |
8589 | fragS *next_fragP; | |
8590 | ||
8591 | if (insn->insn_type != ITYPE_INSN) | |
8592 | return FALSE; | |
8593 | ||
64b607e6 | 8594 | if (xtensa_opcode_is_loop (xtensa_default_isa, insn->opcode) != 1) |
e0001a05 NC |
8595 | return FALSE; |
8596 | ||
8597 | if (insn->ntok <= LOOP_IMMED_OPN) | |
8598 | return FALSE; | |
8599 | ||
91d6fa6a | 8600 | exp = &insn->tok[LOOP_IMMED_OPN]; |
e0001a05 | 8601 | |
91d6fa6a | 8602 | if (exp->X_op != O_symbol) |
e0001a05 NC |
8603 | return FALSE; |
8604 | ||
91d6fa6a | 8605 | symbolP = exp->X_add_symbol; |
e0001a05 NC |
8606 | if (!symbolP) |
8607 | return FALSE; | |
8608 | ||
8609 | if (symbol_get_frag (symbolP) == NULL) | |
8610 | return FALSE; | |
8611 | ||
8612 | /* Walk through fragments until we find the target. | |
8613 | If we do not find the target, then this is an invalid loop. */ | |
43cd72b9 | 8614 | |
e0001a05 NC |
8615 | for (next_fragP = fragP->fr_next; |
8616 | next_fragP != NULL; | |
8617 | next_fragP = next_fragP->fr_next) | |
43cd72b9 BW |
8618 | { |
8619 | if (next_fragP == symbol_get_frag (symbolP)) | |
8620 | return TRUE; | |
8621 | } | |
e0001a05 NC |
8622 | |
8623 | return FALSE; | |
8624 | } | |
8625 | ||
2caa7ca0 BW |
8626 | |
8627 | #define XTINFO_NAME "Xtensa_Info" | |
8628 | #define XTINFO_NAMESZ 12 | |
8629 | #define XTINFO_TYPE 1 | |
8630 | ||
8631 | static void | |
8632 | xtensa_add_config_info (void) | |
8633 | { | |
8634 | asection *info_sec; | |
8635 | char *data, *p; | |
8636 | int sz; | |
8637 | ||
8638 | info_sec = subseg_new (".xtensa.info", 0); | |
8639 | bfd_set_section_flags (stdoutput, info_sec, SEC_HAS_CONTENTS | SEC_READONLY); | |
8640 | ||
325801bd | 8641 | data = XNEWVEC (char, 100); |
2caa7ca0 BW |
8642 | sprintf (data, "USE_ABSOLUTE_LITERALS=%d\nABI=%d\n", |
8643 | XSHAL_USE_ABSOLUTE_LITERALS, XSHAL_ABI); | |
8644 | sz = strlen (data) + 1; | |
8645 | ||
8646 | /* Add enough null terminators to pad to a word boundary. */ | |
8647 | do | |
8648 | data[sz++] = 0; | |
8649 | while ((sz & 3) != 0); | |
8650 | ||
8651 | /* Follow the standard note section layout: | |
8652 | First write the length of the name string. */ | |
8653 | p = frag_more (4); | |
8654 | md_number_to_chars (p, (valueT) XTINFO_NAMESZ, 4); | |
8655 | ||
8656 | /* Next comes the length of the "descriptor", i.e., the actual data. */ | |
8657 | p = frag_more (4); | |
8658 | md_number_to_chars (p, (valueT) sz, 4); | |
8659 | ||
8660 | /* Write the note type. */ | |
8661 | p = frag_more (4); | |
8662 | md_number_to_chars (p, (valueT) XTINFO_TYPE, 4); | |
8663 | ||
8664 | /* Write the name field. */ | |
8665 | p = frag_more (XTINFO_NAMESZ); | |
8666 | memcpy (p, XTINFO_NAME, XTINFO_NAMESZ); | |
8667 | ||
8668 | /* Finally, write the descriptor. */ | |
8669 | p = frag_more (sz); | |
8670 | memcpy (p, data, sz); | |
8671 | ||
8672 | free (data); | |
8673 | } | |
8674 | ||
e0001a05 NC |
8675 | \f |
8676 | /* Alignment Functions. */ | |
8677 | ||
d77b99c9 BW |
8678 | static int |
8679 | get_text_align_power (unsigned target_size) | |
e0001a05 | 8680 | { |
03aaa593 BW |
8681 | if (target_size <= 4) |
8682 | return 2; | |
19ef5f3d SA |
8683 | |
8684 | if (target_size <= 8) | |
8685 | return 3; | |
8686 | ||
8687 | if (target_size <= 16) | |
8688 | return 4; | |
8689 | ||
8690 | if (target_size <= 32) | |
8691 | return 5; | |
8692 | ||
8693 | if (target_size <= 64) | |
8694 | return 6; | |
8695 | ||
8696 | if (target_size <= 128) | |
8697 | return 7; | |
8698 | ||
8699 | if (target_size <= 256) | |
8700 | return 8; | |
8701 | ||
8702 | if (target_size <= 512) | |
8703 | return 9; | |
8704 | ||
8705 | if (target_size <= 1024) | |
8706 | return 10; | |
8707 | ||
8708 | gas_assert (0); | |
8709 | return 0; | |
e0001a05 NC |
8710 | } |
8711 | ||
8712 | ||
d77b99c9 | 8713 | static int |
7fa3d080 BW |
8714 | get_text_align_max_fill_size (int align_pow, |
8715 | bfd_boolean use_nops, | |
8716 | bfd_boolean use_no_density) | |
e0001a05 NC |
8717 | { |
8718 | if (!use_nops) | |
8719 | return (1 << align_pow); | |
8720 | if (use_no_density) | |
8721 | return 3 * (1 << align_pow); | |
8722 | ||
8723 | return 1 + (1 << align_pow); | |
8724 | } | |
8725 | ||
8726 | ||
d77b99c9 BW |
8727 | /* Calculate the minimum bytes of fill needed at "address" to align a |
8728 | target instruction of size "target_size" so that it does not cross a | |
8729 | power-of-two boundary specified by "align_pow". If "use_nops" is FALSE, | |
8730 | the fill can be an arbitrary number of bytes. Otherwise, the space must | |
8731 | be filled by NOP instructions. */ | |
e0001a05 | 8732 | |
d77b99c9 | 8733 | static int |
7fa3d080 BW |
8734 | get_text_align_fill_size (addressT address, |
8735 | int align_pow, | |
8736 | int target_size, | |
8737 | bfd_boolean use_nops, | |
8738 | bfd_boolean use_no_density) | |
e0001a05 | 8739 | { |
d77b99c9 BW |
8740 | addressT alignment, fill, fill_limit, fill_step; |
8741 | bfd_boolean skip_one = FALSE; | |
e0001a05 | 8742 | |
d77b99c9 | 8743 | alignment = (1 << align_pow); |
9c2799c2 | 8744 | gas_assert (target_size > 0 && alignment >= (addressT) target_size); |
c138bc38 | 8745 | |
e0001a05 NC |
8746 | if (!use_nops) |
8747 | { | |
d77b99c9 BW |
8748 | fill_limit = alignment; |
8749 | fill_step = 1; | |
e0001a05 | 8750 | } |
d77b99c9 | 8751 | else if (!use_no_density) |
e0001a05 | 8752 | { |
d77b99c9 BW |
8753 | /* Combine 2- and 3-byte NOPs to fill anything larger than one. */ |
8754 | fill_limit = alignment * 2; | |
8755 | fill_step = 1; | |
8756 | skip_one = TRUE; | |
e0001a05 NC |
8757 | } |
8758 | else | |
8759 | { | |
d77b99c9 BW |
8760 | /* Fill with 3-byte NOPs -- can only fill multiples of 3. */ |
8761 | fill_limit = alignment * 3; | |
8762 | fill_step = 3; | |
8763 | } | |
e0001a05 | 8764 | |
d77b99c9 BW |
8765 | /* Try all fill sizes until finding one that works. */ |
8766 | for (fill = 0; fill < fill_limit; fill += fill_step) | |
8767 | { | |
8768 | if (skip_one && fill == 1) | |
8769 | continue; | |
8770 | if ((address + fill) >> align_pow | |
8771 | == (address + fill + target_size - 1) >> align_pow) | |
8772 | return fill; | |
e0001a05 | 8773 | } |
9c2799c2 | 8774 | gas_assert (0); |
e0001a05 NC |
8775 | return 0; |
8776 | } | |
8777 | ||
8778 | ||
664df4e4 BW |
8779 | static int |
8780 | branch_align_power (segT sec) | |
8781 | { | |
19ef5f3d SA |
8782 | /* If the Xtensa processor has a fetch width of X, and |
8783 | the section is aligned to at least that boundary, then a branch | |
8784 | target need only fit within that aligned block of memory to avoid | |
8785 | a stall. Otherwise, try to fit branch targets within 4-byte | |
8786 | aligned blocks (which may be insufficient, e.g., if the section | |
8787 | has no alignment, but it's good enough). */ | |
8788 | int fetch_align = get_text_align_power(xtensa_fetch_width); | |
8789 | int sec_align = get_recorded_alignment (sec); | |
8790 | ||
8791 | if (sec_align >= fetch_align) | |
8792 | return fetch_align; | |
664df4e4 BW |
8793 | |
8794 | return 2; | |
8795 | } | |
8796 | ||
8797 | ||
e0001a05 NC |
8798 | /* This will assert if it is not possible. */ |
8799 | ||
d77b99c9 BW |
8800 | static int |
8801 | get_text_align_nop_count (offsetT fill_size, bfd_boolean use_no_density) | |
e0001a05 | 8802 | { |
d77b99c9 BW |
8803 | int count = 0; |
8804 | ||
e0001a05 NC |
8805 | if (use_no_density) |
8806 | { | |
9c2799c2 | 8807 | gas_assert (fill_size % 3 == 0); |
e0001a05 NC |
8808 | return (fill_size / 3); |
8809 | } | |
8810 | ||
9c2799c2 | 8811 | gas_assert (fill_size != 1); /* Bad argument. */ |
e0001a05 NC |
8812 | |
8813 | while (fill_size > 1) | |
8814 | { | |
d77b99c9 | 8815 | int insn_size = 3; |
e0001a05 NC |
8816 | if (fill_size == 2 || fill_size == 4) |
8817 | insn_size = 2; | |
8818 | fill_size -= insn_size; | |
8819 | count++; | |
8820 | } | |
9c2799c2 | 8821 | gas_assert (fill_size != 1); /* Bad algorithm. */ |
e0001a05 NC |
8822 | return count; |
8823 | } | |
8824 | ||
8825 | ||
d77b99c9 BW |
8826 | static int |
8827 | get_text_align_nth_nop_size (offsetT fill_size, | |
8828 | int n, | |
7fa3d080 | 8829 | bfd_boolean use_no_density) |
e0001a05 | 8830 | { |
d77b99c9 | 8831 | int count = 0; |
e0001a05 NC |
8832 | |
8833 | if (use_no_density) | |
8834 | return 3; | |
8835 | ||
9c2799c2 | 8836 | gas_assert (fill_size != 1); /* Bad argument. */ |
d77b99c9 | 8837 | |
e0001a05 NC |
8838 | while (fill_size > 1) |
8839 | { | |
d77b99c9 | 8840 | int insn_size = 3; |
e0001a05 NC |
8841 | if (fill_size == 2 || fill_size == 4) |
8842 | insn_size = 2; | |
8843 | fill_size -= insn_size; | |
8844 | count++; | |
8845 | if (n + 1 == count) | |
8846 | return insn_size; | |
8847 | } | |
9c2799c2 | 8848 | gas_assert (0); |
e0001a05 NC |
8849 | return 0; |
8850 | } | |
8851 | ||
8852 | ||
8853 | /* For the given fragment, find the appropriate address | |
8854 | for it to begin at if we are using NOPs to align it. */ | |
8855 | ||
8856 | static addressT | |
7fa3d080 | 8857 | get_noop_aligned_address (fragS *fragP, addressT address) |
e0001a05 | 8858 | { |
43cd72b9 BW |
8859 | /* The rule is: get next fragment's FIRST instruction. Find |
8860 | the smallest number of bytes that need to be added to | |
8861 | ensure that the next fragment's FIRST instruction will fit | |
8862 | in a single word. | |
c138bc38 | 8863 | |
43cd72b9 BW |
8864 | E.G., 2 bytes : 0, 1, 2 mod 4 |
8865 | 3 bytes: 0, 1 mod 4 | |
c138bc38 | 8866 | |
43cd72b9 BW |
8867 | If the FIRST instruction MIGHT be relaxed, |
8868 | assume that it will become a 3-byte instruction. | |
c138bc38 | 8869 | |
43cd72b9 BW |
8870 | Note again here that LOOP instructions are not bundleable, |
8871 | and this relaxation only applies to LOOP opcodes. */ | |
c138bc38 | 8872 | |
d77b99c9 | 8873 | int fill_size = 0; |
43cd72b9 BW |
8874 | int first_insn_size; |
8875 | int loop_insn_size; | |
8876 | addressT pre_opcode_bytes; | |
d77b99c9 | 8877 | int align_power; |
43cd72b9 BW |
8878 | fragS *first_insn; |
8879 | xtensa_opcode opcode; | |
8880 | bfd_boolean is_loop; | |
e0001a05 | 8881 | |
9c2799c2 NC |
8882 | gas_assert (fragP->fr_type == rs_machine_dependent); |
8883 | gas_assert (fragP->fr_subtype == RELAX_ALIGN_NEXT_OPCODE); | |
e0001a05 | 8884 | |
43cd72b9 BW |
8885 | /* Find the loop frag. */ |
8886 | first_insn = next_non_empty_frag (fragP); | |
8887 | /* Now find the first insn frag. */ | |
8888 | first_insn = next_non_empty_frag (first_insn); | |
e0001a05 | 8889 | |
43cd72b9 | 8890 | is_loop = next_frag_opcode_is_loop (fragP, &opcode); |
9c2799c2 | 8891 | gas_assert (is_loop); |
43cd72b9 | 8892 | loop_insn_size = xg_get_single_size (opcode); |
e0001a05 | 8893 | |
43cd72b9 BW |
8894 | pre_opcode_bytes = next_frag_pre_opcode_bytes (fragP); |
8895 | pre_opcode_bytes += loop_insn_size; | |
e0001a05 | 8896 | |
43cd72b9 BW |
8897 | /* For loops, the alignment depends on the size of the |
8898 | instruction following the loop, not the LOOP instruction. */ | |
e0001a05 | 8899 | |
43cd72b9 | 8900 | if (first_insn == NULL) |
03aaa593 BW |
8901 | first_insn_size = xtensa_fetch_width; |
8902 | else | |
8903 | first_insn_size = get_loop_align_size (frag_format_size (first_insn)); | |
e0001a05 | 8904 | |
43cd72b9 | 8905 | /* If it was 8, then we'll need a larger alignment for the section. */ |
d77b99c9 BW |
8906 | align_power = get_text_align_power (first_insn_size); |
8907 | record_alignment (now_seg, align_power); | |
c138bc38 | 8908 | |
43cd72b9 | 8909 | fill_size = get_text_align_fill_size |
d77b99c9 BW |
8910 | (address + pre_opcode_bytes, align_power, first_insn_size, TRUE, |
8911 | fragP->tc_frag_data.is_no_density); | |
e0001a05 NC |
8912 | |
8913 | return address + fill_size; | |
8914 | } | |
8915 | ||
8916 | ||
43cd72b9 BW |
8917 | /* 3 mechanisms for relaxing an alignment: |
8918 | ||
8919 | Align to a power of 2. | |
8920 | Align so the next fragment's instruction does not cross a word boundary. | |
8921 | Align the current instruction so that if the next instruction | |
8922 | were 3 bytes, it would not cross a word boundary. | |
8923 | ||
e0001a05 NC |
8924 | We can align with: |
8925 | ||
43cd72b9 BW |
8926 | zeros - This is easy; always insert zeros. |
8927 | nops - 3-byte and 2-byte instructions | |
8928 | 2 - 2-byte nop | |
8929 | 3 - 3-byte nop | |
8930 | 4 - 2 2-byte nops | |
8931 | >=5 : 3-byte instruction + fn (n-3) | |
e0001a05 NC |
8932 | widening - widen previous instructions. */ |
8933 | ||
d77b99c9 BW |
8934 | static offsetT |
8935 | get_aligned_diff (fragS *fragP, addressT address, offsetT *max_diff) | |
e0001a05 | 8936 | { |
43cd72b9 BW |
8937 | addressT target_address, loop_insn_offset; |
8938 | int target_size; | |
8939 | xtensa_opcode loop_opcode; | |
8940 | bfd_boolean is_loop; | |
d77b99c9 BW |
8941 | int align_power; |
8942 | offsetT opt_diff; | |
5f9084e9 | 8943 | offsetT branch_align; |
def13efb | 8944 | fragS *loop_frag; |
e0001a05 | 8945 | |
9c2799c2 | 8946 | gas_assert (fragP->fr_type == rs_machine_dependent); |
43cd72b9 | 8947 | switch (fragP->fr_subtype) |
e0001a05 | 8948 | { |
43cd72b9 BW |
8949 | case RELAX_DESIRE_ALIGN: |
8950 | target_size = next_frag_format_size (fragP); | |
8951 | if (target_size == XTENSA_UNDEFINED) | |
8952 | target_size = 3; | |
664df4e4 BW |
8953 | align_power = branch_align_power (now_seg); |
8954 | branch_align = 1 << align_power; | |
0e5cd789 BW |
8955 | /* Don't count on the section alignment being as large as the target. */ |
8956 | if (target_size > branch_align) | |
8957 | target_size = branch_align; | |
d77b99c9 | 8958 | opt_diff = get_text_align_fill_size (address, align_power, |
43cd72b9 BW |
8959 | target_size, FALSE, FALSE); |
8960 | ||
664df4e4 BW |
8961 | *max_diff = (opt_diff + branch_align |
8962 | - (target_size + ((address + opt_diff) % branch_align))); | |
9c2799c2 | 8963 | gas_assert (*max_diff >= opt_diff); |
43cd72b9 | 8964 | return opt_diff; |
e0001a05 | 8965 | |
43cd72b9 | 8966 | case RELAX_ALIGN_NEXT_OPCODE: |
def13efb BW |
8967 | /* The next non-empty frag after this one holds the LOOP instruction |
8968 | that needs to be aligned. The required alignment depends on the | |
8969 | size of the next non-empty frag after the loop frag, i.e., the | |
8970 | first instruction in the loop. */ | |
8971 | loop_frag = next_non_empty_frag (fragP); | |
8972 | target_size = get_loop_align_size (next_frag_format_size (loop_frag)); | |
43cd72b9 BW |
8973 | loop_insn_offset = 0; |
8974 | is_loop = next_frag_opcode_is_loop (fragP, &loop_opcode); | |
9c2799c2 | 8975 | gas_assert (is_loop); |
43cd72b9 BW |
8976 | |
8977 | /* If the loop has been expanded then the LOOP instruction | |
8978 | could be at an offset from this fragment. */ | |
def13efb | 8979 | if (loop_frag->tc_frag_data.slot_subtypes[0] != RELAX_IMMED) |
43cd72b9 BW |
8980 | loop_insn_offset = get_expanded_loop_offset (loop_opcode); |
8981 | ||
43cd72b9 BW |
8982 | /* In an ideal world, which is what we are shooting for here, |
8983 | we wouldn't need to use any NOPs immediately prior to the | |
8984 | LOOP instruction. If this approach fails, relax_frag_loop_align | |
8985 | will call get_noop_aligned_address. */ | |
8986 | target_address = | |
8987 | address + loop_insn_offset + xg_get_single_size (loop_opcode); | |
def13efb | 8988 | align_power = get_text_align_power (target_size); |
d77b99c9 | 8989 | opt_diff = get_text_align_fill_size (target_address, align_power, |
43cd72b9 BW |
8990 | target_size, FALSE, FALSE); |
8991 | ||
8992 | *max_diff = xtensa_fetch_width | |
8993 | - ((target_address + opt_diff) % xtensa_fetch_width) | |
8994 | - target_size + opt_diff; | |
9c2799c2 | 8995 | gas_assert (*max_diff >= opt_diff); |
43cd72b9 | 8996 | return opt_diff; |
e0001a05 | 8997 | |
43cd72b9 BW |
8998 | default: |
8999 | break; | |
e0001a05 | 9000 | } |
9c2799c2 | 9001 | gas_assert (0); |
43cd72b9 | 9002 | return 0; |
e0001a05 NC |
9003 | } |
9004 | ||
9005 | \f | |
9006 | /* md_relax_frag Hook and Helper Functions. */ | |
9007 | ||
7fa3d080 BW |
9008 | static long relax_frag_loop_align (fragS *, long); |
9009 | static long relax_frag_for_align (fragS *, long); | |
9010 | static long relax_frag_immed | |
9011 | (segT, fragS *, long, int, xtensa_format, int, int *, bfd_boolean); | |
9012 | ||
b76f99d7 MF |
9013 | typedef struct cached_fixup cached_fixupS; |
9014 | struct cached_fixup | |
9015 | { | |
9016 | int addr; | |
9017 | int target; | |
9018 | int delta; | |
9019 | fixS *fixP; | |
9020 | }; | |
9021 | ||
9022 | typedef struct fixup_cache fixup_cacheS; | |
9023 | struct fixup_cache | |
9024 | { | |
9025 | cached_fixupS *fixups; | |
9026 | unsigned n_fixups; | |
9027 | unsigned n_max; | |
9028 | ||
9029 | segT seg; | |
9030 | fragS *first_frag; | |
9031 | }; | |
9032 | ||
9033 | static int fixup_order (const void *a, const void *b) | |
9034 | { | |
9035 | const cached_fixupS *pa = a; | |
9036 | const cached_fixupS *pb = b; | |
9037 | ||
9038 | if (pa->addr == pb->addr) | |
9039 | { | |
9040 | if (pa->target == pb->target) | |
9041 | { | |
9042 | if (pa->fixP->fx_r_type == pb->fixP->fx_r_type) | |
9043 | return 0; | |
9044 | return pa->fixP->fx_r_type < pb->fixP->fx_r_type ? -1 : 1; | |
9045 | } | |
9046 | return pa->target - pb->target; | |
9047 | } | |
9048 | return pa->addr - pb->addr; | |
9049 | } | |
9050 | ||
9051 | static bfd_boolean xtensa_make_cached_fixup (cached_fixupS *o, fixS *fixP) | |
9052 | { | |
9053 | xtensa_isa isa = xtensa_default_isa; | |
9054 | int addr = fixP->fx_frag->fr_address; | |
9055 | int target; | |
9056 | int delta; | |
9057 | symbolS *s = fixP->fx_addsy; | |
9058 | int slot; | |
9059 | xtensa_format fmt; | |
9060 | xtensa_opcode opcode; | |
9061 | ||
9062 | if (fixP->fx_r_type < BFD_RELOC_XTENSA_SLOT0_OP || | |
9063 | fixP->fx_r_type > BFD_RELOC_XTENSA_SLOT14_OP) | |
9064 | return FALSE; | |
9065 | target = S_GET_VALUE (s); | |
9066 | delta = target - addr; | |
9067 | ||
9068 | if (abs(delta) < J_RANGE / 2) | |
9069 | return FALSE; | |
9070 | ||
9071 | xtensa_insnbuf_from_chars (isa, trampoline_buf, | |
9072 | (unsigned char *) fixP->fx_frag->fr_literal + | |
9073 | fixP->fx_where, 0); | |
9074 | fmt = xtensa_format_decode (isa, trampoline_buf); | |
9075 | gas_assert (fmt != XTENSA_UNDEFINED); | |
9076 | slot = fixP->tc_fix_data.slot; | |
9077 | xtensa_format_get_slot (isa, fmt, slot, trampoline_buf, trampoline_slotbuf); | |
9078 | opcode = xtensa_opcode_decode (isa, fmt, slot, trampoline_slotbuf); | |
9079 | if (opcode != xtensa_j_opcode) | |
9080 | return FALSE; | |
9081 | ||
9082 | o->addr = addr; | |
9083 | o->target = target; | |
9084 | o->delta = delta; | |
9085 | o->fixP = fixP; | |
9086 | ||
9087 | return TRUE; | |
9088 | } | |
9089 | ||
9090 | static void xtensa_realloc_fixup_cache (fixup_cacheS *cache, unsigned add) | |
9091 | { | |
9092 | if (cache->n_fixups + add > cache->n_max) | |
9093 | { | |
9094 | cache->n_max = (cache->n_fixups + add) * 2; | |
325801bd | 9095 | cache->fixups = XRESIZEVEC (cached_fixupS, cache->fixups, cache->n_max); |
b76f99d7 MF |
9096 | } |
9097 | } | |
9098 | ||
9099 | static void xtensa_cache_relaxable_fixups (fixup_cacheS *cache, | |
9100 | segment_info_type *seginfo) | |
9101 | { | |
9102 | fixS *fixP; | |
9103 | ||
9104 | cache->n_fixups = 0; | |
9105 | ||
9106 | for (fixP = seginfo->fix_root; fixP ; fixP = fixP->fx_next) | |
9107 | { | |
9108 | xtensa_realloc_fixup_cache (cache, 1); | |
9109 | ||
9110 | if (xtensa_make_cached_fixup (cache->fixups + cache->n_fixups, fixP)) | |
9111 | ++cache->n_fixups; | |
9112 | } | |
9113 | qsort (cache->fixups, cache->n_fixups, sizeof (*cache->fixups), fixup_order); | |
9114 | } | |
9115 | ||
9116 | static unsigned xtensa_find_first_cached_fixup (const fixup_cacheS *cache, | |
9117 | int addr) | |
9118 | { | |
9119 | unsigned a = 0; | |
9120 | unsigned b = cache->n_fixups; | |
9121 | ||
9122 | while (b - a > 1) | |
9123 | { | |
9124 | unsigned c = (a + b) / 2; | |
9125 | ||
9126 | if (cache->fixups[c].addr < addr) | |
9127 | a = c; | |
9128 | else | |
9129 | b = c; | |
9130 | } | |
9131 | return a; | |
9132 | } | |
9133 | ||
9134 | static void xtensa_delete_cached_fixup (fixup_cacheS *cache, unsigned i) | |
9135 | { | |
9136 | memmove (cache->fixups + i, cache->fixups + i + 1, | |
9137 | (cache->n_fixups - i - 1) * sizeof (*cache->fixups)); | |
9138 | --cache->n_fixups; | |
9139 | } | |
9140 | ||
9141 | static bfd_boolean xtensa_add_cached_fixup (fixup_cacheS *cache, fixS *fixP) | |
9142 | { | |
9143 | cached_fixupS o; | |
9144 | unsigned i; | |
9145 | ||
9146 | if (!xtensa_make_cached_fixup (&o, fixP)) | |
9147 | return FALSE; | |
9148 | xtensa_realloc_fixup_cache (cache, 1); | |
9149 | i = xtensa_find_first_cached_fixup (cache, o.addr); | |
9150 | if (i < cache->n_fixups) | |
9151 | { | |
9152 | ++i; | |
9153 | memmove (cache->fixups + i + 1, cache->fixups + i, | |
9154 | (cache->n_fixups - i) * sizeof (*cache->fixups)); | |
9155 | } | |
9156 | cache->fixups[i] = o; | |
9157 | ++cache->n_fixups; | |
9158 | return TRUE; | |
9159 | } | |
7fa3d080 | 9160 | |
e0001a05 NC |
9161 | /* Return the number of bytes added to this fragment, given that the |
9162 | input has been stretched already by "stretch". */ | |
9163 | ||
9164 | long | |
7fa3d080 | 9165 | xtensa_relax_frag (fragS *fragP, long stretch, int *stretched_p) |
e0001a05 | 9166 | { |
43cd72b9 | 9167 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
9168 | int unreported = fragP->tc_frag_data.unreported_expansion; |
9169 | long new_stretch = 0; | |
3b4dbbbf | 9170 | const char *file_name; |
d77b99c9 BW |
9171 | unsigned line; |
9172 | int lit_size; | |
43cd72b9 BW |
9173 | static xtensa_insnbuf vbuf = NULL; |
9174 | int slot, num_slots; | |
9175 | xtensa_format fmt; | |
e0001a05 | 9176 | |
3b4dbbbf | 9177 | file_name = as_where (&line); |
e0001a05 NC |
9178 | new_logical_line (fragP->fr_file, fragP->fr_line); |
9179 | ||
9180 | fragP->tc_frag_data.unreported_expansion = 0; | |
9181 | ||
9182 | switch (fragP->fr_subtype) | |
9183 | { | |
9184 | case RELAX_ALIGN_NEXT_OPCODE: | |
9185 | /* Always convert. */ | |
43cd72b9 BW |
9186 | if (fragP->tc_frag_data.relax_seen) |
9187 | new_stretch = relax_frag_loop_align (fragP, stretch); | |
e0001a05 NC |
9188 | break; |
9189 | ||
9190 | case RELAX_LOOP_END: | |
9191 | /* Do nothing. */ | |
9192 | break; | |
9193 | ||
9194 | case RELAX_LOOP_END_ADD_NOP: | |
9195 | /* Add a NOP and switch to .fill 0. */ | |
9196 | new_stretch = relax_frag_add_nop (fragP); | |
43cd72b9 | 9197 | frag_wane (fragP); |
e0001a05 NC |
9198 | break; |
9199 | ||
9200 | case RELAX_DESIRE_ALIGN: | |
43cd72b9 | 9201 | /* Do nothing. The narrowing before this frag will either align |
e0001a05 NC |
9202 | it or not. */ |
9203 | break; | |
9204 | ||
9205 | case RELAX_LITERAL: | |
9206 | case RELAX_LITERAL_FINAL: | |
9207 | return 0; | |
9208 | ||
9209 | case RELAX_LITERAL_NR: | |
9210 | lit_size = 4; | |
9211 | fragP->fr_subtype = RELAX_LITERAL_FINAL; | |
9c2799c2 | 9212 | gas_assert (unreported == lit_size); |
e0001a05 NC |
9213 | memset (&fragP->fr_literal[fragP->fr_fix], 0, 4); |
9214 | fragP->fr_var -= lit_size; | |
9215 | fragP->fr_fix += lit_size; | |
9216 | new_stretch = 4; | |
9217 | break; | |
9218 | ||
43cd72b9 BW |
9219 | case RELAX_SLOTS: |
9220 | if (vbuf == NULL) | |
9221 | vbuf = xtensa_insnbuf_alloc (isa); | |
9222 | ||
d77b99c9 BW |
9223 | xtensa_insnbuf_from_chars |
9224 | (isa, vbuf, (unsigned char *) fragP->fr_opcode, 0); | |
43cd72b9 BW |
9225 | fmt = xtensa_format_decode (isa, vbuf); |
9226 | num_slots = xtensa_format_num_slots (isa, fmt); | |
e0001a05 | 9227 | |
43cd72b9 BW |
9228 | for (slot = 0; slot < num_slots; slot++) |
9229 | { | |
9230 | switch (fragP->tc_frag_data.slot_subtypes[slot]) | |
9231 | { | |
9232 | case RELAX_NARROW: | |
9233 | if (fragP->tc_frag_data.relax_seen) | |
9234 | new_stretch += relax_frag_for_align (fragP, stretch); | |
9235 | break; | |
9236 | ||
9237 | case RELAX_IMMED: | |
9238 | case RELAX_IMMED_STEP1: | |
9239 | case RELAX_IMMED_STEP2: | |
b81bf389 | 9240 | case RELAX_IMMED_STEP3: |
43cd72b9 BW |
9241 | /* Place the immediate. */ |
9242 | new_stretch += relax_frag_immed | |
9243 | (now_seg, fragP, stretch, | |
9244 | fragP->tc_frag_data.slot_subtypes[slot] - RELAX_IMMED, | |
9245 | fmt, slot, stretched_p, FALSE); | |
9246 | break; | |
9247 | ||
9248 | default: | |
9249 | /* This is OK; see the note in xg_assemble_vliw_tokens. */ | |
9250 | break; | |
9251 | } | |
9252 | } | |
e0001a05 NC |
9253 | break; |
9254 | ||
9255 | case RELAX_LITERAL_POOL_BEGIN: | |
b46824bd MF |
9256 | if (fragP->fr_var != 0) |
9257 | { | |
9258 | /* We have a converted "candidate" literal pool; | |
9259 | assemble a jump around it. */ | |
9260 | TInsn insn; | |
9261 | if (!litpool_slotbuf) | |
9262 | { | |
9263 | litpool_buf = xtensa_insnbuf_alloc (isa); | |
9264 | litpool_slotbuf = xtensa_insnbuf_alloc (isa); | |
9265 | } | |
9266 | new_stretch += 3; | |
9267 | fragP->tc_frag_data.relax_seen = FALSE; /* Need another pass. */ | |
9268 | fragP->tc_frag_data.is_insn = TRUE; | |
9269 | tinsn_init (&insn); | |
9270 | insn.insn_type = ITYPE_INSN; | |
9271 | insn.opcode = xtensa_j_opcode; | |
9272 | insn.ntok = 1; | |
9273 | set_expr_symbol_offset (&insn.tok[0], fragP->fr_symbol, | |
9274 | fragP->fr_fix); | |
9275 | fmt = xg_get_single_format (xtensa_j_opcode); | |
9276 | tinsn_to_slotbuf (fmt, 0, &insn, litpool_slotbuf); | |
9277 | xtensa_format_set_slot (isa, fmt, 0, litpool_buf, litpool_slotbuf); | |
9278 | xtensa_insnbuf_to_chars (isa, litpool_buf, | |
9279 | (unsigned char *)fragP->fr_literal + | |
9280 | fragP->fr_fix, 3); | |
9281 | fragP->fr_fix += 3; | |
9282 | fragP->fr_var -= 3; | |
9283 | /* Add a fix-up. */ | |
9284 | fix_new (fragP, 0, 3, fragP->fr_symbol, 0, TRUE, | |
9285 | BFD_RELOC_XTENSA_SLOT0_OP); | |
9286 | } | |
9287 | break; | |
9288 | ||
e0001a05 | 9289 | case RELAX_LITERAL_POOL_END: |
b46824bd | 9290 | case RELAX_LITERAL_POOL_CANDIDATE_BEGIN: |
43cd72b9 BW |
9291 | case RELAX_MAYBE_UNREACHABLE: |
9292 | case RELAX_MAYBE_DESIRE_ALIGN: | |
e0001a05 NC |
9293 | /* No relaxation required. */ |
9294 | break; | |
9295 | ||
43cd72b9 BW |
9296 | case RELAX_FILL_NOP: |
9297 | case RELAX_UNREACHABLE: | |
9298 | if (fragP->tc_frag_data.relax_seen) | |
9299 | new_stretch += relax_frag_for_align (fragP, stretch); | |
9300 | break; | |
9301 | ||
a82c7d90 DW |
9302 | case RELAX_TRAMPOLINE: |
9303 | if (fragP->tc_frag_data.relax_seen) | |
9304 | { | |
b76f99d7 MF |
9305 | static fixup_cacheS fixup_cache; |
9306 | segment_info_type *seginfo = seg_info (now_seg); | |
9307 | int trampaddr = fragP->fr_address + fragP->fr_fix; | |
9308 | int searchaddr = trampaddr < J_RANGE ? 0 : trampaddr - J_RANGE; | |
9309 | unsigned i; | |
9310 | ||
9311 | if (now_seg != fixup_cache.seg || | |
9312 | fragP == fixup_cache.first_frag || | |
9313 | fixup_cache.first_frag == NULL) | |
9314 | { | |
9315 | xtensa_cache_relaxable_fixups (&fixup_cache, seginfo); | |
9316 | fixup_cache.seg = now_seg; | |
9317 | fixup_cache.first_frag = fragP; | |
9318 | } | |
a82c7d90 DW |
9319 | |
9320 | /* Scan for jumps that will not reach. */ | |
b76f99d7 MF |
9321 | for (i = xtensa_find_first_cached_fixup (&fixup_cache, searchaddr); |
9322 | i < fixup_cache.n_fixups; ++i) | |
9323 | ||
a82c7d90 | 9324 | { |
b76f99d7 MF |
9325 | fixS *fixP = fixup_cache.fixups[i].fixP; |
9326 | int target = fixup_cache.fixups[i].target; | |
9327 | int addr = fixup_cache.fixups[i].addr; | |
9328 | int delta = fixup_cache.fixups[i].delta + stretch; | |
9329 | ||
9330 | trampaddr = fragP->fr_address + fragP->fr_fix; | |
9331 | ||
dc58915f | 9332 | if (addr + J_RANGE < trampaddr) |
a82c7d90 | 9333 | continue; |
b76f99d7 MF |
9334 | if (addr > trampaddr + J_RANGE) |
9335 | break; | |
9336 | if (abs (delta) < J_RANGE) | |
9337 | continue; | |
9338 | ||
9339 | slot = fixP->tc_fix_data.slot; | |
9340 | ||
a82c7d90 DW |
9341 | if (delta > J_RANGE || delta < -1 * J_RANGE) |
9342 | { /* Found an out-of-range jump; scan the list of trampolines for the best match. */ | |
9343 | struct trampoline_seg *ts = find_trampoline_seg (now_seg); | |
9344 | struct trampoline_frag *tf = ts->trampoline_list.next; | |
9345 | struct trampoline_frag *prev = &ts->trampoline_list; | |
9346 | int lower = (target < addr) ? target : addr; | |
9347 | int upper = (target > addr) ? target : addr; | |
9348 | int midpoint = lower + (upper - lower) / 2; | |
9349 | ||
9350 | if ((upper - lower) > 2 * J_RANGE) | |
9351 | { | |
9352 | /* One trampoline won't suffice; we need multiple jumps. | |
9353 | Jump to the trampoline that's farthest, but still in | |
9354 | range relative to the original "j" instruction. */ | |
9355 | for ( ; tf; prev = tf, tf = tf->next ) | |
9356 | { | |
9357 | int this_addr = tf->fragP->fr_address + tf->fragP->fr_fix; | |
9358 | int next_addr = (tf->next) ? tf->next->fragP->fr_address + tf->next->fragP->fr_fix : 0 ; | |
9359 | ||
9360 | if (addr == lower) | |
9361 | { | |
9362 | /* Forward jump. */ | |
9363 | if (this_addr - addr < J_RANGE) | |
9364 | break; | |
9365 | } | |
9366 | else | |
9367 | { | |
9368 | /* Backward jump. */ | |
9369 | if (next_addr == 0 || addr - next_addr > J_RANGE) | |
9370 | break; | |
9371 | } | |
9372 | } | |
9373 | } | |
9374 | else | |
9375 | { | |
9376 | struct trampoline_frag *best_tf = NULL; | |
9377 | int best_delta = 0; | |
9378 | ||
9379 | for ( ; tf; prev = tf, tf = tf->next ) | |
9380 | { | |
9381 | int this_addr = tf->fragP->fr_address + tf->fragP->fr_fix; | |
9382 | int this_delta = abs (this_addr - midpoint); | |
9383 | ||
9384 | if (!best_tf || this_delta < best_delta) | |
9385 | { | |
9386 | best_tf = tf; | |
9387 | best_delta = this_delta; | |
9388 | } | |
9389 | } | |
9390 | tf = best_tf; | |
9391 | } | |
9392 | if (tf->fragP == fragP) | |
9393 | { | |
a82c7d90 DW |
9394 | if (abs (addr - trampaddr) < J_RANGE) |
9395 | { /* The trampoline is in range of original; fix it! */ | |
9396 | fixS *newfixP; | |
9397 | int offset; | |
9398 | TInsn insn; | |
9399 | symbolS *lsym; | |
b76f99d7 | 9400 | fragS *fP; /* The out-of-range jump. */ |
a82c7d90 DW |
9401 | |
9402 | new_stretch += init_trampoline_frag (tf); | |
9403 | offset = fragP->fr_fix; /* Where to assemble the j insn. */ | |
9404 | lsym = fragP->fr_symbol; | |
9405 | fP = fixP->fx_frag; | |
9406 | /* Assemble a jump to the target label here. */ | |
9407 | tinsn_init (&insn); | |
9408 | insn.insn_type = ITYPE_INSN; | |
9409 | insn.opcode = xtensa_j_opcode; | |
9410 | insn.ntok = 1; | |
9411 | set_expr_symbol_offset (&insn.tok[0], lsym, offset); | |
9412 | fmt = xg_get_single_format (xtensa_j_opcode); | |
9413 | tinsn_to_slotbuf (fmt, 0, &insn, trampoline_slotbuf); | |
9414 | xtensa_format_set_slot (isa, fmt, 0, trampoline_buf, trampoline_slotbuf); | |
9415 | xtensa_insnbuf_to_chars (isa, trampoline_buf, (unsigned char *)fragP->fr_literal + offset, 3); | |
9416 | fragP->fr_fix += 3; | |
9417 | fragP->fr_var -= 3; | |
9418 | /* Add a fix-up for the original j insn. */ | |
9419 | newfixP = fix_new (fP, fixP->fx_where, fixP->fx_size, lsym, fragP->fr_fix - 3, TRUE, fixP->fx_r_type); | |
9420 | newfixP->fx_no_overflow = 1; | |
9421 | newfixP->tc_fix_data.X_add_symbol = lsym; | |
9422 | newfixP->tc_fix_data.X_add_number = offset; | |
9423 | newfixP->tc_fix_data.slot = slot; | |
b76f99d7 MF |
9424 | |
9425 | xtensa_delete_cached_fixup (&fixup_cache, i); | |
9426 | xtensa_add_cached_fixup (&fixup_cache, newfixP); | |
9427 | ||
a82c7d90 DW |
9428 | /* Move the fix-up from the original j insn to this one. */ |
9429 | fixP->fx_frag = fragP; | |
9430 | fixP->fx_where = fragP->fr_fix - 3; | |
24e5b4e6 | 9431 | fixP->fx_size = 3; |
a82c7d90 | 9432 | fixP->tc_fix_data.slot = 0; |
24e5b4e6 | 9433 | fixP->fx_r_type = BFD_RELOC_XTENSA_SLOT0_OP; |
b76f99d7 MF |
9434 | |
9435 | xtensa_add_cached_fixup (&fixup_cache, fixP); | |
9436 | ||
9437 | /* re-do current fixup */ | |
9438 | --i; | |
9439 | ||
a82c7d90 DW |
9440 | /* Adjust the jump around this trampoline (if present). */ |
9441 | if (tf->fixP != NULL) | |
9442 | { | |
9443 | tf->fixP->fx_offset += 3; | |
9444 | } | |
9445 | new_stretch += 3; | |
9446 | fragP->tc_frag_data.relax_seen = FALSE; /* Need another pass. */ | |
9447 | /* Do we have room for more? */ | |
9448 | if (fragP->fr_var < 3) | |
9449 | { /* No, convert to fill. */ | |
9450 | frag_wane (fragP); | |
9451 | fragP->fr_subtype = 0; | |
9452 | /* Remove from the trampoline_list. */ | |
9453 | prev->next = tf->next; | |
b76f99d7 MF |
9454 | if (fragP == fixup_cache.first_frag) |
9455 | fixup_cache.first_frag = NULL; | |
a82c7d90 DW |
9456 | break; |
9457 | } | |
9458 | } | |
9459 | } | |
9460 | } | |
9461 | } | |
9462 | } | |
9463 | break; | |
9464 | ||
e0001a05 NC |
9465 | default: |
9466 | as_bad (_("bad relaxation state")); | |
9467 | } | |
9468 | ||
43cd72b9 | 9469 | /* Tell gas we need another relaxation pass. */ |
c138bc38 | 9470 | if (! fragP->tc_frag_data.relax_seen) |
43cd72b9 BW |
9471 | { |
9472 | fragP->tc_frag_data.relax_seen = TRUE; | |
9473 | *stretched_p = 1; | |
9474 | } | |
9475 | ||
e0001a05 NC |
9476 | new_logical_line (file_name, line); |
9477 | return new_stretch; | |
9478 | } | |
9479 | ||
9480 | ||
9481 | static long | |
7fa3d080 | 9482 | relax_frag_loop_align (fragS *fragP, long stretch) |
e0001a05 NC |
9483 | { |
9484 | addressT old_address, old_next_address, old_size; | |
9485 | addressT new_address, new_next_address, new_size; | |
9486 | addressT growth; | |
9487 | ||
43cd72b9 BW |
9488 | /* All the frags with relax_frag_for_alignment prior to this one in the |
9489 | section have been done, hopefully eliminating the need for a NOP here. | |
9490 | But, this will put it in if necessary. */ | |
e0001a05 NC |
9491 | |
9492 | /* Calculate the old address of this fragment and the next fragment. */ | |
9493 | old_address = fragP->fr_address - stretch; | |
9494 | old_next_address = (fragP->fr_address - stretch + fragP->fr_fix + | |
43cd72b9 | 9495 | fragP->tc_frag_data.text_expansion[0]); |
e0001a05 NC |
9496 | old_size = old_next_address - old_address; |
9497 | ||
9498 | /* Calculate the new address of this fragment and the next fragment. */ | |
9499 | new_address = fragP->fr_address; | |
9500 | new_next_address = | |
9501 | get_noop_aligned_address (fragP, fragP->fr_address + fragP->fr_fix); | |
9502 | new_size = new_next_address - new_address; | |
9503 | ||
9504 | growth = new_size - old_size; | |
9505 | ||
9506 | /* Fix up the text_expansion field and return the new growth. */ | |
43cd72b9 | 9507 | fragP->tc_frag_data.text_expansion[0] += growth; |
e0001a05 NC |
9508 | return growth; |
9509 | } | |
9510 | ||
9511 | ||
43cd72b9 | 9512 | /* Add a NOP instruction. */ |
e0001a05 NC |
9513 | |
9514 | static long | |
7fa3d080 | 9515 | relax_frag_add_nop (fragS *fragP) |
e0001a05 | 9516 | { |
e0001a05 | 9517 | char *nop_buf = fragP->fr_literal + fragP->fr_fix; |
43cd72b9 BW |
9518 | int length = fragP->tc_frag_data.is_no_density ? 3 : 2; |
9519 | assemble_nop (length, nop_buf); | |
e0001a05 | 9520 | fragP->tc_frag_data.is_insn = TRUE; |
e0001a05 | 9521 | |
e0001a05 NC |
9522 | if (fragP->fr_var < length) |
9523 | { | |
dd49a749 | 9524 | as_fatal (_("fr_var (%ld) < length (%d)"), (long) fragP->fr_var, length); |
e0001a05 NC |
9525 | return 0; |
9526 | } | |
9527 | ||
9528 | fragP->fr_fix += length; | |
9529 | fragP->fr_var -= length; | |
e0001a05 NC |
9530 | return length; |
9531 | } | |
9532 | ||
9533 | ||
7fa3d080 BW |
9534 | static long future_alignment_required (fragS *, long); |
9535 | ||
e0001a05 | 9536 | static long |
7fa3d080 | 9537 | relax_frag_for_align (fragS *fragP, long stretch) |
e0001a05 | 9538 | { |
43cd72b9 BW |
9539 | /* Overview of the relaxation procedure for alignment: |
9540 | We can widen with NOPs or by widening instructions or by filling | |
9541 | bytes after jump instructions. Find the opportune places and widen | |
9542 | them if necessary. */ | |
9543 | ||
9544 | long stretch_me; | |
9545 | long diff; | |
e0001a05 | 9546 | |
9c2799c2 | 9547 | gas_assert (fragP->fr_subtype == RELAX_FILL_NOP |
43cd72b9 BW |
9548 | || fragP->fr_subtype == RELAX_UNREACHABLE |
9549 | || (fragP->fr_subtype == RELAX_SLOTS | |
9550 | && fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW)); | |
9551 | ||
9552 | stretch_me = future_alignment_required (fragP, stretch); | |
9553 | diff = stretch_me - fragP->tc_frag_data.text_expansion[0]; | |
9554 | if (diff == 0) | |
9555 | return 0; | |
e0001a05 | 9556 | |
43cd72b9 | 9557 | if (diff < 0) |
e0001a05 | 9558 | { |
43cd72b9 BW |
9559 | /* We expanded on a previous pass. Can we shrink now? */ |
9560 | long shrink = fragP->tc_frag_data.text_expansion[0] - stretch_me; | |
9561 | if (shrink <= stretch && stretch > 0) | |
e0001a05 | 9562 | { |
43cd72b9 BW |
9563 | fragP->tc_frag_data.text_expansion[0] = stretch_me; |
9564 | return -shrink; | |
e0001a05 NC |
9565 | } |
9566 | return 0; | |
9567 | } | |
9568 | ||
43cd72b9 BW |
9569 | /* Below here, diff > 0. */ |
9570 | fragP->tc_frag_data.text_expansion[0] = stretch_me; | |
e0001a05 | 9571 | |
43cd72b9 | 9572 | return diff; |
e0001a05 NC |
9573 | } |
9574 | ||
9575 | ||
43cd72b9 BW |
9576 | /* Return the address of the next frag that should be aligned. |
9577 | ||
9578 | By "address" we mean the address it _would_ be at if there | |
9579 | is no action taken to align it between here and the target frag. | |
9580 | In other words, if no narrows and no fill nops are used between | |
9581 | here and the frag to align, _even_if_ some of the frags we use | |
9582 | to align targets have already expanded on a previous relaxation | |
9583 | pass. | |
9584 | ||
9585 | Also, count each frag that may be used to help align the target. | |
9586 | ||
9587 | Return 0 if there are no frags left in the chain that need to be | |
9588 | aligned. */ | |
9589 | ||
9590 | static addressT | |
7fa3d080 BW |
9591 | find_address_of_next_align_frag (fragS **fragPP, |
9592 | int *wide_nops, | |
9593 | int *narrow_nops, | |
9594 | int *widens, | |
9595 | bfd_boolean *paddable) | |
e0001a05 | 9596 | { |
43cd72b9 BW |
9597 | fragS *fragP = *fragPP; |
9598 | addressT address = fragP->fr_address; | |
9599 | ||
9600 | /* Do not reset the counts to 0. */ | |
e0001a05 NC |
9601 | |
9602 | while (fragP) | |
9603 | { | |
9604 | /* Limit this to a small search. */ | |
b5e4a23d | 9605 | if (*widens >= (int) xtensa_fetch_width) |
43cd72b9 BW |
9606 | { |
9607 | *fragPP = fragP; | |
9608 | return 0; | |
9609 | } | |
e0001a05 NC |
9610 | address += fragP->fr_fix; |
9611 | ||
43cd72b9 BW |
9612 | if (fragP->fr_type == rs_fill) |
9613 | address += fragP->fr_offset * fragP->fr_var; | |
9614 | else if (fragP->fr_type == rs_machine_dependent) | |
e0001a05 | 9615 | { |
e0001a05 NC |
9616 | switch (fragP->fr_subtype) |
9617 | { | |
43cd72b9 BW |
9618 | case RELAX_UNREACHABLE: |
9619 | *paddable = TRUE; | |
9620 | break; | |
9621 | ||
9622 | case RELAX_FILL_NOP: | |
9623 | (*wide_nops)++; | |
9624 | if (!fragP->tc_frag_data.is_no_density) | |
9625 | (*narrow_nops)++; | |
9626 | break; | |
9627 | ||
9628 | case RELAX_SLOTS: | |
9629 | if (fragP->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
9630 | { | |
9631 | (*widens)++; | |
9632 | break; | |
9633 | } | |
5bb3703f | 9634 | address += total_frag_text_expansion (fragP); |
e0001a05 NC |
9635 | break; |
9636 | ||
9637 | case RELAX_IMMED: | |
43cd72b9 | 9638 | address += fragP->tc_frag_data.text_expansion[0]; |
e0001a05 NC |
9639 | break; |
9640 | ||
9641 | case RELAX_ALIGN_NEXT_OPCODE: | |
9642 | case RELAX_DESIRE_ALIGN: | |
43cd72b9 BW |
9643 | *fragPP = fragP; |
9644 | return address; | |
9645 | ||
9646 | case RELAX_MAYBE_UNREACHABLE: | |
9647 | case RELAX_MAYBE_DESIRE_ALIGN: | |
9648 | /* Do nothing. */ | |
e0001a05 NC |
9649 | break; |
9650 | ||
9651 | default: | |
43cd72b9 BW |
9652 | /* Just punt if we don't know the type. */ |
9653 | *fragPP = fragP; | |
9654 | return 0; | |
e0001a05 | 9655 | } |
43cd72b9 | 9656 | } |
c138bc38 | 9657 | else |
43cd72b9 BW |
9658 | { |
9659 | /* Just punt if we don't know the type. */ | |
9660 | *fragPP = fragP; | |
9661 | return 0; | |
9662 | } | |
9663 | fragP = fragP->fr_next; | |
9664 | } | |
9665 | ||
9666 | *fragPP = fragP; | |
9667 | return 0; | |
9668 | } | |
9669 | ||
9670 | ||
7fa3d080 BW |
9671 | static long bytes_to_stretch (fragS *, int, int, int, int); |
9672 | ||
43cd72b9 | 9673 | static long |
7fa3d080 | 9674 | future_alignment_required (fragS *fragP, long stretch ATTRIBUTE_UNUSED) |
43cd72b9 BW |
9675 | { |
9676 | fragS *this_frag = fragP; | |
9677 | long address; | |
9678 | int num_widens = 0; | |
9679 | int wide_nops = 0; | |
9680 | int narrow_nops = 0; | |
9681 | bfd_boolean paddable = FALSE; | |
9682 | offsetT local_opt_diff; | |
9683 | offsetT opt_diff; | |
9684 | offsetT max_diff; | |
9685 | int stretch_amount = 0; | |
9686 | int local_stretch_amount; | |
9687 | int global_stretch_amount; | |
9688 | ||
7fa3d080 BW |
9689 | address = find_address_of_next_align_frag |
9690 | (&fragP, &wide_nops, &narrow_nops, &num_widens, &paddable); | |
43cd72b9 | 9691 | |
b5e4a23d BW |
9692 | if (!address) |
9693 | { | |
9694 | if (this_frag->tc_frag_data.is_aligning_branch) | |
9695 | this_frag->tc_frag_data.slot_subtypes[0] = RELAX_IMMED; | |
9696 | else | |
9697 | frag_wane (this_frag); | |
9698 | } | |
9699 | else | |
43cd72b9 BW |
9700 | { |
9701 | local_opt_diff = get_aligned_diff (fragP, address, &max_diff); | |
9702 | opt_diff = local_opt_diff; | |
9c2799c2 NC |
9703 | gas_assert (opt_diff >= 0); |
9704 | gas_assert (max_diff >= opt_diff); | |
c138bc38 | 9705 | if (max_diff == 0) |
43cd72b9 | 9706 | return 0; |
d2a033cd | 9707 | |
43cd72b9 BW |
9708 | if (fragP) |
9709 | fragP = fragP->fr_next; | |
9710 | ||
9711 | while (fragP && opt_diff < max_diff && address) | |
9712 | { | |
9713 | /* We only use these to determine if we can exit early | |
c138bc38 | 9714 | because there will be plenty of ways to align future |
43cd72b9 | 9715 | align frags. */ |
d77b99c9 | 9716 | int glob_widens = 0; |
43cd72b9 BW |
9717 | int dnn = 0; |
9718 | int dw = 0; | |
9719 | bfd_boolean glob_pad = 0; | |
7fa3d080 BW |
9720 | address = find_address_of_next_align_frag |
9721 | (&fragP, &glob_widens, &dnn, &dw, &glob_pad); | |
43cd72b9 | 9722 | /* If there is a padable portion, then skip. */ |
664df4e4 | 9723 | if (glob_pad || glob_widens >= (1 << branch_align_power (now_seg))) |
b5e4a23d | 9724 | address = 0; |
43cd72b9 | 9725 | |
c138bc38 | 9726 | if (address) |
43cd72b9 BW |
9727 | { |
9728 | offsetT next_m_diff; | |
9729 | offsetT next_o_diff; | |
9730 | ||
9731 | /* Downrange frags haven't had stretch added to them yet. */ | |
9732 | address += stretch; | |
9733 | ||
9734 | /* The address also includes any text expansion from this | |
9735 | frag in a previous pass, but we don't want that. */ | |
9736 | address -= this_frag->tc_frag_data.text_expansion[0]; | |
9737 | ||
9738 | /* Assume we are going to move at least opt_diff. In | |
9739 | reality, we might not be able to, but assuming that | |
9740 | we will helps catch cases where moving opt_diff pushes | |
9741 | the next target from aligned to unaligned. */ | |
9742 | address += opt_diff; | |
9743 | ||
9744 | next_o_diff = get_aligned_diff (fragP, address, &next_m_diff); | |
9745 | ||
9746 | /* Now cleanup for the adjustments to address. */ | |
9747 | next_o_diff += opt_diff; | |
9748 | next_m_diff += opt_diff; | |
9749 | if (next_o_diff <= max_diff && next_o_diff > opt_diff) | |
9750 | opt_diff = next_o_diff; | |
9751 | if (next_m_diff < max_diff) | |
9752 | max_diff = next_m_diff; | |
9753 | fragP = fragP->fr_next; | |
9754 | } | |
9755 | } | |
d2a033cd | 9756 | |
43cd72b9 BW |
9757 | /* If there are enough wideners in between, do it. */ |
9758 | if (paddable) | |
9759 | { | |
9760 | if (this_frag->fr_subtype == RELAX_UNREACHABLE) | |
9761 | { | |
1beeb686 | 9762 | gas_assert (opt_diff <= (signed) xtensa_fetch_width); |
43cd72b9 BW |
9763 | return opt_diff; |
9764 | } | |
9765 | return 0; | |
9766 | } | |
c138bc38 | 9767 | local_stretch_amount |
43cd72b9 BW |
9768 | = bytes_to_stretch (this_frag, wide_nops, narrow_nops, |
9769 | num_widens, local_opt_diff); | |
c138bc38 BW |
9770 | global_stretch_amount |
9771 | = bytes_to_stretch (this_frag, wide_nops, narrow_nops, | |
43cd72b9 | 9772 | num_widens, opt_diff); |
c138bc38 BW |
9773 | /* If the condition below is true, then the frag couldn't |
9774 | stretch the correct amount for the global case, so we just | |
9775 | optimize locally. We'll rely on the subsequent frags to get | |
43cd72b9 BW |
9776 | the correct alignment in the global case. */ |
9777 | if (global_stretch_amount < local_stretch_amount) | |
9778 | stretch_amount = local_stretch_amount; | |
9779 | else | |
9780 | stretch_amount = global_stretch_amount; | |
d2a033cd | 9781 | |
43cd72b9 BW |
9782 | if (this_frag->fr_subtype == RELAX_SLOTS |
9783 | && this_frag->tc_frag_data.slot_subtypes[0] == RELAX_NARROW) | |
9c2799c2 | 9784 | gas_assert (stretch_amount <= 1); |
43cd72b9 BW |
9785 | else if (this_frag->fr_subtype == RELAX_FILL_NOP) |
9786 | { | |
9787 | if (this_frag->tc_frag_data.is_no_density) | |
9c2799c2 | 9788 | gas_assert (stretch_amount == 3 || stretch_amount == 0); |
43cd72b9 | 9789 | else |
9c2799c2 | 9790 | gas_assert (stretch_amount <= 3); |
43cd72b9 BW |
9791 | } |
9792 | } | |
9793 | return stretch_amount; | |
9794 | } | |
9795 | ||
9796 | ||
9797 | /* The idea: widen everything you can to get a target or loop aligned, | |
9798 | then start using NOPs. | |
9799 | ||
43cd72b9 BW |
9800 | wide_nops = the number of wide NOPs available for aligning |
9801 | narrow_nops = the number of narrow NOPs available for aligning | |
9802 | (a subset of wide_nops) | |
9803 | widens = the number of narrow instructions that should be widened | |
9804 | ||
43cd72b9 BW |
9805 | */ |
9806 | ||
9807 | static long | |
7fa3d080 BW |
9808 | bytes_to_stretch (fragS *this_frag, |
9809 | int wide_nops, | |
9810 | int narrow_nops, | |
9811 | int num_widens, | |
9812 | int desired_diff) | |
43cd72b9 | 9813 | { |
19ef5f3d SA |
9814 | int nops_needed; |
9815 | int nop_bytes; | |
9816 | int extra_bytes; | |
43cd72b9 BW |
9817 | int bytes_short = desired_diff - num_widens; |
9818 | ||
3739860c | 9819 | gas_assert (desired_diff >= 0 |
1beeb686 | 9820 | && desired_diff < (signed) xtensa_fetch_width); |
43cd72b9 BW |
9821 | if (desired_diff == 0) |
9822 | return 0; | |
c138bc38 | 9823 | |
9c2799c2 | 9824 | gas_assert (wide_nops > 0 || num_widens > 0); |
e0001a05 | 9825 | |
43cd72b9 BW |
9826 | /* Always prefer widening to NOP-filling. */ |
9827 | if (bytes_short < 0) | |
9828 | { | |
9829 | /* There are enough RELAX_NARROW frags after this one | |
9830 | to align the target without widening this frag in any way. */ | |
9831 | return 0; | |
9832 | } | |
c138bc38 | 9833 | |
43cd72b9 BW |
9834 | if (bytes_short == 0) |
9835 | { | |
9836 | /* Widen every narrow between here and the align target | |
9837 | and the align target will be properly aligned. */ | |
9838 | if (this_frag->fr_subtype == RELAX_FILL_NOP) | |
9839 | return 0; | |
9840 | else | |
9841 | return 1; | |
9842 | } | |
c138bc38 | 9843 | |
43cd72b9 BW |
9844 | /* From here we will need at least one NOP to get an alignment. |
9845 | However, we may not be able to align at all, in which case, | |
9846 | don't widen. */ | |
19ef5f3d SA |
9847 | nops_needed = desired_diff / 3; |
9848 | ||
9849 | /* If there aren't enough nops, don't widen. */ | |
9850 | if (nops_needed > wide_nops) | |
9851 | return 0; | |
9852 | ||
9853 | /* First try it with all wide nops. */ | |
9854 | nop_bytes = nops_needed * 3; | |
9855 | extra_bytes = desired_diff - nop_bytes; | |
9856 | ||
9857 | if (nop_bytes + num_widens >= desired_diff) | |
43cd72b9 | 9858 | { |
19ef5f3d SA |
9859 | if (this_frag->fr_subtype == RELAX_FILL_NOP) |
9860 | return 3; | |
9861 | else if (num_widens == extra_bytes) | |
9862 | return 1; | |
9863 | return 0; | |
e0001a05 | 9864 | } |
19ef5f3d SA |
9865 | |
9866 | /* Add a narrow nop. */ | |
9867 | nops_needed++; | |
9868 | nop_bytes += 2; | |
9869 | extra_bytes -= 2; | |
9870 | if (narrow_nops == 0 || nops_needed > wide_nops) | |
9871 | return 0; | |
9872 | ||
9873 | if (nop_bytes + num_widens >= desired_diff && extra_bytes >= 0) | |
43cd72b9 | 9874 | { |
19ef5f3d SA |
9875 | if (this_frag->fr_subtype == RELAX_FILL_NOP) |
9876 | return !this_frag->tc_frag_data.is_no_density ? 2 : 3; | |
9877 | else if (num_widens == extra_bytes) | |
9878 | return 1; | |
9879 | return 0; | |
9880 | } | |
e0001a05 | 9881 | |
19ef5f3d SA |
9882 | /* Replace a wide nop with a narrow nop--we can get here if |
9883 | extra_bytes was negative in the previous conditional. */ | |
9884 | if (narrow_nops == 1) | |
9885 | return 0; | |
9886 | nop_bytes--; | |
9887 | extra_bytes++; | |
9888 | if (nop_bytes + num_widens >= desired_diff) | |
9889 | { | |
9890 | if (this_frag->fr_subtype == RELAX_FILL_NOP) | |
9891 | return !this_frag->tc_frag_data.is_no_density ? 2 : 3; | |
9892 | else if (num_widens == extra_bytes) | |
9893 | return 1; | |
9894 | return 0; | |
43cd72b9 | 9895 | } |
19ef5f3d SA |
9896 | |
9897 | /* If we can't satisfy any of the above cases, then we can't align | |
9898 | using padding or fill nops. */ | |
43cd72b9 | 9899 | return 0; |
e0001a05 NC |
9900 | } |
9901 | ||
9902 | ||
a82c7d90 DW |
9903 | static struct trampoline_frag * |
9904 | search_trampolines (TInsn *tinsn, fragS *fragP, bfd_boolean unreachable_only) | |
9905 | { | |
9906 | struct trampoline_seg *ts = find_trampoline_seg (now_seg); | |
9907 | struct trampoline_frag *tf = (ts) ? ts->trampoline_list.next : NULL; | |
9908 | struct trampoline_frag *best_tf = NULL; | |
9909 | int best_delta = 0; | |
9910 | int best_addr = 0; | |
9911 | symbolS *sym = tinsn->tok[0].X_add_symbol; | |
9912 | offsetT target = S_GET_VALUE (sym) + tinsn->tok[0].X_add_number; | |
9913 | offsetT addr = fragP->fr_address; | |
9914 | offsetT lower = (addr < target) ? addr : target; | |
9915 | offsetT upper = (addr > target) ? addr : target; | |
9916 | int delta = upper - lower; | |
9917 | offsetT midpoint = lower + delta / 2; | |
9918 | int this_delta = -1; | |
9919 | int this_addr = -1; | |
9920 | ||
9921 | if (delta > 2 * J_RANGE) | |
9922 | { | |
9923 | /* One trampoline won't do; we need multiple. | |
9924 | Choose the farthest trampoline that's still in range of the original | |
9925 | and let a later pass finish the job. */ | |
9926 | for ( ; tf; tf = tf->next) | |
9927 | { | |
9928 | int next_addr = (tf->next) ? tf->next->fragP->fr_address + tf->next->fragP->fr_fix : 0; | |
9929 | ||
9930 | this_addr = tf->fragP->fr_address + tf->fragP->fr_fix; | |
9931 | if (lower == addr) | |
9932 | { | |
9933 | /* Forward jump. */ | |
9934 | if (this_addr - addr < J_RANGE) | |
9935 | break; | |
9936 | } | |
9937 | else | |
9938 | { | |
9939 | /* Backward jump. */ | |
9940 | if (next_addr == 0 || addr - next_addr > J_RANGE) | |
9941 | break; | |
9942 | } | |
a82c7d90 | 9943 | } |
d92b6eec MF |
9944 | if (abs (addr - this_addr) < J_RANGE) |
9945 | return tf; | |
9946 | ||
9947 | return NULL; | |
a82c7d90 DW |
9948 | } |
9949 | for ( ; tf; tf = tf->next) | |
9950 | { | |
9951 | this_addr = tf->fragP->fr_address + tf->fragP->fr_fix; | |
9952 | this_delta = abs (this_addr - midpoint); | |
9953 | if (unreachable_only && tf->needs_jump_around) | |
9954 | continue; | |
9955 | if (!best_tf || this_delta < best_delta) | |
9956 | { | |
9957 | best_tf = tf; | |
9958 | best_delta = this_delta; | |
9959 | best_addr = this_addr; | |
9960 | } | |
9961 | } | |
9962 | ||
9963 | if (best_tf && | |
9964 | best_delta < J_RANGE && | |
9965 | abs(best_addr - lower) < J_RANGE && | |
9966 | abs(best_addr - upper) < J_RANGE) | |
9967 | return best_tf; | |
9968 | ||
9969 | return NULL; /* No suitable trampoline found. */ | |
9970 | } | |
9971 | ||
9972 | ||
9973 | static struct trampoline_frag * | |
9974 | get_best_trampoline (TInsn *tinsn, fragS *fragP) | |
9975 | { | |
9976 | struct trampoline_frag *tf = NULL; | |
9977 | ||
9978 | tf = search_trampolines (tinsn, fragP, TRUE); /* Try unreachable first. */ | |
9979 | ||
9980 | if (tf == NULL) | |
9981 | tf = search_trampolines (tinsn, fragP, FALSE); /* Try ones needing a jump-around, too. */ | |
9982 | ||
9983 | return tf; | |
9984 | } | |
9985 | ||
9986 | ||
9987 | static void | |
9988 | check_and_update_trampolines (void) | |
9989 | { | |
9990 | struct trampoline_seg *ts = find_trampoline_seg (now_seg); | |
9991 | struct trampoline_frag *tf = ts->trampoline_list.next; | |
9992 | struct trampoline_frag *prev = &ts->trampoline_list; | |
9993 | ||
9994 | for ( ; tf; prev = tf, tf = tf->next) | |
9995 | { | |
9996 | if (tf->fragP->fr_var < 3) | |
9997 | { | |
9998 | frag_wane (tf->fragP); | |
9999 | prev->next = tf->next; | |
10000 | tf->fragP = NULL; | |
10001 | } | |
10002 | } | |
10003 | } | |
10004 | ||
10005 | ||
10006 | static int | |
10007 | init_trampoline_frag (struct trampoline_frag *trampP) | |
10008 | { | |
10009 | fragS *fp = trampP->fragP; | |
10010 | int growth = 0; | |
10011 | ||
10012 | if (fp->fr_fix == 0) | |
10013 | { | |
10014 | symbolS *lsym; | |
10015 | char label[10 + 2 * sizeof(fp)]; | |
10016 | sprintf (label, ".L0_TR_%p", fp); | |
10017 | ||
10018 | lsym = (symbolS *)local_symbol_make (label, now_seg, 0, fp); | |
10019 | fp->fr_symbol = lsym; | |
10020 | if (trampP->needs_jump_around) | |
10021 | { | |
10022 | /* Add a jump around this block of jumps, in case | |
10023 | control flows into this block. */ | |
10024 | fixS *fixP; | |
10025 | TInsn insn; | |
10026 | xtensa_format fmt; | |
10027 | xtensa_isa isa = xtensa_default_isa; | |
10028 | ||
10029 | fp->tc_frag_data.is_insn = 1; | |
10030 | /* Assemble a jump insn. */ | |
10031 | tinsn_init (&insn); | |
10032 | insn.insn_type = ITYPE_INSN; | |
10033 | insn.opcode = xtensa_j_opcode; | |
10034 | insn.ntok = 1; | |
10035 | set_expr_symbol_offset (&insn.tok[0], lsym, 3); | |
10036 | fmt = xg_get_single_format (xtensa_j_opcode); | |
10037 | tinsn_to_slotbuf (fmt, 0, &insn, trampoline_slotbuf); | |
10038 | xtensa_format_set_slot (isa, fmt, 0, trampoline_buf, trampoline_slotbuf); | |
10039 | xtensa_insnbuf_to_chars (isa, trampoline_buf, (unsigned char *)fp->fr_literal, 3); | |
10040 | fp->fr_fix += 3; | |
10041 | fp->fr_var -= 3; | |
10042 | growth = 3; | |
10043 | fixP = fix_new (fp, 0, 3, lsym, 3, TRUE, BFD_RELOC_XTENSA_SLOT0_OP); | |
10044 | trampP->fixP = fixP; | |
10045 | } | |
10046 | } | |
10047 | return growth; | |
10048 | } | |
10049 | ||
10050 | ||
10051 | static int | |
10052 | add_jump_to_trampoline (struct trampoline_frag *trampP, fragS *origfrag) | |
10053 | { | |
10054 | fragS *tramp = trampP->fragP; | |
10055 | fixS *fixP; | |
10056 | int offset = tramp->fr_fix; /* Where to assemble the j insn. */ | |
10057 | TInsn insn; | |
10058 | symbolS *lsym; | |
10059 | symbolS *tsym; | |
10060 | int toffset; | |
10061 | xtensa_format fmt; | |
10062 | xtensa_isa isa = xtensa_default_isa; | |
10063 | int growth = 0; | |
24e5b4e6 MF |
10064 | int i, slot = -1; |
10065 | ||
10066 | for (i = 0; i < MAX_SLOTS; ++i) | |
10067 | if (origfrag->tc_frag_data.slot_symbols[i]) | |
10068 | { | |
10069 | gas_assert (slot == -1); | |
10070 | slot = i; | |
10071 | } | |
10072 | ||
10073 | gas_assert (slot >= 0 && slot < MAX_SLOTS); | |
a82c7d90 DW |
10074 | |
10075 | lsym = tramp->fr_symbol; | |
10076 | /* Assemble a jump to the target label in the trampoline frag. */ | |
24e5b4e6 MF |
10077 | tsym = origfrag->tc_frag_data.slot_symbols[slot]; |
10078 | toffset = origfrag-> tc_frag_data.slot_offsets[slot]; | |
a82c7d90 DW |
10079 | tinsn_init (&insn); |
10080 | insn.insn_type = ITYPE_INSN; | |
10081 | insn.opcode = xtensa_j_opcode; | |
10082 | insn.ntok = 1; | |
10083 | set_expr_symbol_offset (&insn.tok[0], tsym, toffset); | |
10084 | fmt = xg_get_single_format (xtensa_j_opcode); | |
10085 | tinsn_to_slotbuf (fmt, 0, &insn, trampoline_slotbuf); | |
10086 | xtensa_format_set_slot (isa, fmt, 0, trampoline_buf, trampoline_slotbuf); | |
10087 | xtensa_insnbuf_to_chars (isa, trampoline_buf, (unsigned char *)tramp->fr_literal + offset, 3); | |
10088 | tramp->fr_fix += 3; | |
10089 | tramp->fr_var -= 3; | |
10090 | growth = 3; | |
10091 | /* add a fix-up for the trampoline jump. */ | |
10092 | fixP = fix_new (tramp, tramp->fr_fix - 3, 3, tsym, toffset, TRUE, BFD_RELOC_XTENSA_SLOT0_OP); | |
10093 | /* Modify the jump at the start of this trampoline to point past the newly-added jump. */ | |
10094 | fixP = trampP->fixP; | |
10095 | if (fixP) | |
10096 | fixP->fx_offset += 3; | |
10097 | /* Modify the original j to point here. */ | |
24e5b4e6 MF |
10098 | origfrag->tc_frag_data.slot_symbols[slot] = lsym; |
10099 | origfrag->tc_frag_data.slot_offsets[slot] = tramp->fr_fix - 3; | |
a82c7d90 DW |
10100 | /* If trampoline is full, remove it from the list. */ |
10101 | check_and_update_trampolines (); | |
10102 | ||
10103 | return growth; | |
10104 | } | |
10105 | ||
10106 | ||
e0001a05 | 10107 | static long |
7fa3d080 BW |
10108 | relax_frag_immed (segT segP, |
10109 | fragS *fragP, | |
10110 | long stretch, | |
10111 | int min_steps, | |
10112 | xtensa_format fmt, | |
10113 | int slot, | |
10114 | int *stretched_p, | |
10115 | bfd_boolean estimate_only) | |
e0001a05 | 10116 | { |
43cd72b9 | 10117 | TInsn tinsn; |
e0001a05 NC |
10118 | int old_size; |
10119 | bfd_boolean negatable_branch = FALSE; | |
10120 | bfd_boolean branch_jmp_to_next = FALSE; | |
def13efb | 10121 | bfd_boolean from_wide_insn = FALSE; |
43cd72b9 | 10122 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
10123 | IStack istack; |
10124 | offsetT frag_offset; | |
10125 | int num_steps; | |
e0001a05 | 10126 | int num_text_bytes, num_literal_bytes; |
2276bc20 | 10127 | int literal_diff, total_text_diff, this_text_diff; |
e0001a05 | 10128 | |
9c2799c2 | 10129 | gas_assert (fragP->fr_opcode != NULL); |
e0001a05 | 10130 | |
b5e4a23d BW |
10131 | xg_clear_vinsn (&cur_vinsn); |
10132 | vinsn_from_chars (&cur_vinsn, fragP->fr_opcode); | |
b2d179be | 10133 | if (cur_vinsn.num_slots > 1) |
def13efb | 10134 | from_wide_insn = TRUE; |
43cd72b9 | 10135 | |
b5e4a23d | 10136 | tinsn = cur_vinsn.slots[slot]; |
43cd72b9 | 10137 | tinsn_immed_from_frag (&tinsn, fragP, slot); |
e0001a05 | 10138 | |
64b607e6 | 10139 | if (estimate_only && xtensa_opcode_is_loop (isa, tinsn.opcode) == 1) |
43cd72b9 | 10140 | return 0; |
e0001a05 | 10141 | |
b08b5071 | 10142 | if (workaround_b_j_loop_end && ! fragP->tc_frag_data.is_no_transform) |
43cd72b9 | 10143 | branch_jmp_to_next = is_branch_jmp_to_next (&tinsn, fragP); |
e0001a05 | 10144 | |
43cd72b9 | 10145 | negatable_branch = (xtensa_opcode_is_branch (isa, tinsn.opcode) == 1); |
e0001a05 | 10146 | |
43cd72b9 | 10147 | old_size = xtensa_format_length (isa, fmt); |
e0001a05 NC |
10148 | |
10149 | /* Special case: replace a branch to the next instruction with a NOP. | |
10150 | This is required to work around a hardware bug in T1040.0 and also | |
10151 | serves as an optimization. */ | |
10152 | ||
10153 | if (branch_jmp_to_next | |
10154 | && ((old_size == 2) || (old_size == 3)) | |
10155 | && !next_frag_is_loop_target (fragP)) | |
10156 | return 0; | |
10157 | ||
10158 | /* Here is the fun stuff: Get the immediate field from this | |
10159 | instruction. If it fits, we are done. If not, find the next | |
10160 | instruction sequence that fits. */ | |
10161 | ||
10162 | frag_offset = fragP->fr_opcode - fragP->fr_literal; | |
10163 | istack_init (&istack); | |
43cd72b9 | 10164 | num_steps = xg_assembly_relax (&istack, &tinsn, segP, fragP, frag_offset, |
e0001a05 | 10165 | min_steps, stretch); |
9c2799c2 | 10166 | gas_assert (num_steps >= min_steps && num_steps <= RELAX_IMMED_MAXSTEPS); |
e0001a05 | 10167 | |
43cd72b9 | 10168 | fragP->tc_frag_data.slot_subtypes[slot] = (int) RELAX_IMMED + num_steps; |
e0001a05 NC |
10169 | |
10170 | /* Figure out the number of bytes needed. */ | |
e0001a05 | 10171 | num_literal_bytes = get_num_stack_literal_bytes (&istack); |
2276bc20 BW |
10172 | literal_diff |
10173 | = num_literal_bytes - fragP->tc_frag_data.literal_expansion[slot]; | |
43cd72b9 | 10174 | num_text_bytes = get_num_stack_text_bytes (&istack); |
def13efb BW |
10175 | |
10176 | if (from_wide_insn) | |
43cd72b9 | 10177 | { |
2276bc20 BW |
10178 | int first = 0; |
10179 | while (istack.insn[first].opcode == XTENSA_UNDEFINED) | |
10180 | first++; | |
10181 | ||
43cd72b9 BW |
10182 | num_text_bytes += old_size; |
10183 | if (opcode_fits_format_slot (istack.insn[first].opcode, fmt, slot)) | |
10184 | num_text_bytes -= xg_get_single_size (istack.insn[first].opcode); | |
2276bc20 BW |
10185 | else |
10186 | { | |
10187 | /* The first instruction in the relaxed sequence will go after | |
10188 | the current wide instruction, and thus its symbolic immediates | |
10189 | might not fit. */ | |
3739860c | 10190 | |
2276bc20 | 10191 | istack_init (&istack); |
3739860c | 10192 | num_steps = xg_assembly_relax (&istack, &tinsn, segP, fragP, |
2276bc20 BW |
10193 | frag_offset + old_size, |
10194 | min_steps, stretch + old_size); | |
9c2799c2 | 10195 | gas_assert (num_steps >= min_steps && num_steps <= RELAX_IMMED_MAXSTEPS); |
2276bc20 | 10196 | |
3739860c | 10197 | fragP->tc_frag_data.slot_subtypes[slot] |
2276bc20 BW |
10198 | = (int) RELAX_IMMED + num_steps; |
10199 | ||
10200 | num_literal_bytes = get_num_stack_literal_bytes (&istack); | |
3739860c | 10201 | literal_diff |
2276bc20 | 10202 | = num_literal_bytes - fragP->tc_frag_data.literal_expansion[slot]; |
3739860c | 10203 | |
2276bc20 BW |
10204 | num_text_bytes = get_num_stack_text_bytes (&istack) + old_size; |
10205 | } | |
43cd72b9 | 10206 | } |
def13efb | 10207 | |
43cd72b9 BW |
10208 | total_text_diff = num_text_bytes - old_size; |
10209 | this_text_diff = total_text_diff - fragP->tc_frag_data.text_expansion[slot]; | |
e0001a05 NC |
10210 | |
10211 | /* It MUST get larger. If not, we could get an infinite loop. */ | |
9c2799c2 NC |
10212 | gas_assert (num_text_bytes >= 0); |
10213 | gas_assert (literal_diff >= 0); | |
10214 | gas_assert (total_text_diff >= 0); | |
e0001a05 | 10215 | |
43cd72b9 BW |
10216 | fragP->tc_frag_data.text_expansion[slot] = total_text_diff; |
10217 | fragP->tc_frag_data.literal_expansion[slot] = num_literal_bytes; | |
9c2799c2 NC |
10218 | gas_assert (fragP->tc_frag_data.text_expansion[slot] >= 0); |
10219 | gas_assert (fragP->tc_frag_data.literal_expansion[slot] >= 0); | |
e0001a05 NC |
10220 | |
10221 | /* Find the associated expandable literal for this. */ | |
10222 | if (literal_diff != 0) | |
10223 | { | |
2276bc20 | 10224 | fragS *lit_fragP = fragP->tc_frag_data.literal_frags[slot]; |
e0001a05 NC |
10225 | if (lit_fragP) |
10226 | { | |
9c2799c2 | 10227 | gas_assert (literal_diff == 4); |
e0001a05 NC |
10228 | lit_fragP->tc_frag_data.unreported_expansion += literal_diff; |
10229 | ||
10230 | /* We expect that the literal section state has NOT been | |
10231 | modified yet. */ | |
9c2799c2 | 10232 | gas_assert (lit_fragP->fr_type == rs_machine_dependent |
e0001a05 NC |
10233 | && lit_fragP->fr_subtype == RELAX_LITERAL); |
10234 | lit_fragP->fr_subtype = RELAX_LITERAL_NR; | |
10235 | ||
10236 | /* We need to mark this section for another iteration | |
10237 | of relaxation. */ | |
10238 | (*stretched_p)++; | |
10239 | } | |
10240 | } | |
10241 | ||
43cd72b9 | 10242 | if (negatable_branch && istack.ninsn > 1) |
1d19a770 | 10243 | update_next_frag_state (fragP); |
e0001a05 | 10244 | |
a82c7d90 DW |
10245 | /* If last insn is a jump, and it cannot reach its target, try to find a trampoline. */ |
10246 | if (istack.ninsn > 2 && | |
10247 | istack.insn[istack.ninsn - 1].insn_type == ITYPE_LABEL && | |
10248 | istack.insn[istack.ninsn - 2].insn_type == ITYPE_INSN && | |
10249 | istack.insn[istack.ninsn - 2].opcode == xtensa_j_opcode) | |
10250 | { | |
10251 | TInsn *jinsn = &istack.insn[istack.ninsn - 2]; | |
10252 | ||
10253 | if (!xg_symbolic_immeds_fit (jinsn, segP, fragP, fragP->fr_offset, total_text_diff)) | |
10254 | { | |
10255 | struct trampoline_frag *tf = get_best_trampoline (jinsn, fragP); | |
10256 | ||
10257 | if (tf) | |
10258 | { | |
10259 | this_text_diff += init_trampoline_frag (tf); | |
10260 | this_text_diff += add_jump_to_trampoline (tf, fragP); | |
10261 | } | |
10262 | else | |
10263 | { | |
10264 | /* If target symbol is undefined, assume it will reach once linked. */ | |
10265 | expressionS *exp = &istack.insn[istack.ninsn - 2].tok[0]; | |
10266 | ||
10267 | if (exp->X_op == O_symbol && S_IS_DEFINED (exp->X_add_symbol)) | |
10268 | { | |
10269 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
10270 | _("jump target out of range; no usable trampoline found")); | |
10271 | } | |
10272 | } | |
10273 | } | |
10274 | } | |
10275 | ||
43cd72b9 | 10276 | return this_text_diff; |
e0001a05 NC |
10277 | } |
10278 | ||
10279 | \f | |
10280 | /* md_convert_frag Hook and Helper Functions. */ | |
10281 | ||
7fa3d080 BW |
10282 | static void convert_frag_align_next_opcode (fragS *); |
10283 | static void convert_frag_narrow (segT, fragS *, xtensa_format, int); | |
10284 | static void convert_frag_fill_nop (fragS *); | |
10285 | static void convert_frag_immed (segT, fragS *, int, xtensa_format, int); | |
10286 | ||
e0001a05 | 10287 | void |
7fa3d080 | 10288 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT sec, fragS *fragp) |
e0001a05 | 10289 | { |
43cd72b9 BW |
10290 | static xtensa_insnbuf vbuf = NULL; |
10291 | xtensa_isa isa = xtensa_default_isa; | |
10292 | int slot; | |
10293 | int num_slots; | |
10294 | xtensa_format fmt; | |
3b4dbbbf | 10295 | const char *file_name; |
d77b99c9 | 10296 | unsigned line; |
e0001a05 | 10297 | |
3b4dbbbf | 10298 | file_name = as_where (&line); |
e0001a05 NC |
10299 | new_logical_line (fragp->fr_file, fragp->fr_line); |
10300 | ||
10301 | switch (fragp->fr_subtype) | |
10302 | { | |
10303 | case RELAX_ALIGN_NEXT_OPCODE: | |
10304 | /* Always convert. */ | |
10305 | convert_frag_align_next_opcode (fragp); | |
10306 | break; | |
10307 | ||
10308 | case RELAX_DESIRE_ALIGN: | |
10309 | /* Do nothing. If not aligned already, too bad. */ | |
10310 | break; | |
10311 | ||
43cd72b9 BW |
10312 | case RELAX_LITERAL: |
10313 | case RELAX_LITERAL_FINAL: | |
10314 | break; | |
10315 | ||
10316 | case RELAX_SLOTS: | |
10317 | if (vbuf == NULL) | |
10318 | vbuf = xtensa_insnbuf_alloc (isa); | |
10319 | ||
d77b99c9 BW |
10320 | xtensa_insnbuf_from_chars |
10321 | (isa, vbuf, (unsigned char *) fragp->fr_opcode, 0); | |
43cd72b9 BW |
10322 | fmt = xtensa_format_decode (isa, vbuf); |
10323 | num_slots = xtensa_format_num_slots (isa, fmt); | |
10324 | ||
10325 | for (slot = 0; slot < num_slots; slot++) | |
10326 | { | |
10327 | switch (fragp->tc_frag_data.slot_subtypes[slot]) | |
10328 | { | |
10329 | case RELAX_NARROW: | |
10330 | convert_frag_narrow (sec, fragp, fmt, slot); | |
10331 | break; | |
10332 | ||
10333 | case RELAX_IMMED: | |
10334 | case RELAX_IMMED_STEP1: | |
10335 | case RELAX_IMMED_STEP2: | |
b81bf389 | 10336 | case RELAX_IMMED_STEP3: |
43cd72b9 BW |
10337 | /* Place the immediate. */ |
10338 | convert_frag_immed | |
10339 | (sec, fragp, | |
10340 | fragp->tc_frag_data.slot_subtypes[slot] - RELAX_IMMED, | |
10341 | fmt, slot); | |
10342 | break; | |
10343 | ||
10344 | default: | |
10345 | /* This is OK because some slots could have | |
10346 | relaxations and others have none. */ | |
10347 | break; | |
10348 | } | |
10349 | } | |
10350 | break; | |
10351 | ||
10352 | case RELAX_UNREACHABLE: | |
10353 | memset (&fragp->fr_literal[fragp->fr_fix], 0, fragp->fr_var); | |
10354 | fragp->fr_fix += fragp->tc_frag_data.text_expansion[0]; | |
10355 | fragp->fr_var -= fragp->tc_frag_data.text_expansion[0]; | |
10356 | frag_wane (fragp); | |
e0001a05 NC |
10357 | break; |
10358 | ||
43cd72b9 BW |
10359 | case RELAX_MAYBE_UNREACHABLE: |
10360 | case RELAX_MAYBE_DESIRE_ALIGN: | |
10361 | frag_wane (fragp); | |
e0001a05 NC |
10362 | break; |
10363 | ||
43cd72b9 BW |
10364 | case RELAX_FILL_NOP: |
10365 | convert_frag_fill_nop (fragp); | |
e0001a05 NC |
10366 | break; |
10367 | ||
10368 | case RELAX_LITERAL_NR: | |
10369 | if (use_literal_section) | |
10370 | { | |
10371 | /* This should have been handled during relaxation. When | |
10372 | relaxing a code segment, literals sometimes need to be | |
10373 | added to the corresponding literal segment. If that | |
10374 | literal segment has already been relaxed, then we end up | |
10375 | in this situation. Marking the literal segments as data | |
10376 | would make this happen less often (since GAS always relaxes | |
10377 | code before data), but we could still get into trouble if | |
10378 | there are instructions in a segment that is not marked as | |
10379 | containing code. Until we can implement a better solution, | |
10380 | cheat and adjust the addresses of all the following frags. | |
10381 | This could break subsequent alignments, but the linker's | |
10382 | literal coalescing will do that anyway. */ | |
10383 | ||
10384 | fragS *f; | |
10385 | fragp->fr_subtype = RELAX_LITERAL_FINAL; | |
9c2799c2 | 10386 | gas_assert (fragp->tc_frag_data.unreported_expansion == 4); |
e0001a05 NC |
10387 | memset (&fragp->fr_literal[fragp->fr_fix], 0, 4); |
10388 | fragp->fr_var -= 4; | |
10389 | fragp->fr_fix += 4; | |
10390 | for (f = fragp->fr_next; f; f = f->fr_next) | |
10391 | f->fr_address += 4; | |
10392 | } | |
10393 | else | |
10394 | as_bad (_("invalid relaxation fragment result")); | |
10395 | break; | |
a82c7d90 DW |
10396 | |
10397 | case RELAX_TRAMPOLINE: | |
10398 | break; | |
e0001a05 NC |
10399 | } |
10400 | ||
10401 | fragp->fr_var = 0; | |
10402 | new_logical_line (file_name, line); | |
10403 | } | |
10404 | ||
10405 | ||
7fa3d080 BW |
10406 | static void |
10407 | convert_frag_align_next_opcode (fragS *fragp) | |
e0001a05 NC |
10408 | { |
10409 | char *nop_buf; /* Location for Writing. */ | |
e0001a05 NC |
10410 | bfd_boolean use_no_density = fragp->tc_frag_data.is_no_density; |
10411 | addressT aligned_address; | |
d77b99c9 BW |
10412 | offsetT fill_size; |
10413 | int nop, nop_count; | |
e0001a05 NC |
10414 | |
10415 | aligned_address = get_noop_aligned_address (fragp, fragp->fr_address + | |
10416 | fragp->fr_fix); | |
10417 | fill_size = aligned_address - (fragp->fr_address + fragp->fr_fix); | |
10418 | nop_count = get_text_align_nop_count (fill_size, use_no_density); | |
10419 | nop_buf = fragp->fr_literal + fragp->fr_fix; | |
10420 | ||
d77b99c9 | 10421 | for (nop = 0; nop < nop_count; nop++) |
e0001a05 | 10422 | { |
d77b99c9 BW |
10423 | int nop_size; |
10424 | nop_size = get_text_align_nth_nop_size (fill_size, nop, use_no_density); | |
e0001a05 NC |
10425 | |
10426 | assemble_nop (nop_size, nop_buf); | |
10427 | nop_buf += nop_size; | |
10428 | } | |
10429 | ||
10430 | fragp->fr_fix += fill_size; | |
10431 | fragp->fr_var -= fill_size; | |
10432 | } | |
10433 | ||
10434 | ||
10435 | static void | |
7fa3d080 | 10436 | convert_frag_narrow (segT segP, fragS *fragP, xtensa_format fmt, int slot) |
e0001a05 | 10437 | { |
43cd72b9 | 10438 | TInsn tinsn, single_target; |
84b08ed9 | 10439 | int size, old_size, diff; |
e0001a05 NC |
10440 | offsetT frag_offset; |
10441 | ||
9c2799c2 | 10442 | gas_assert (slot == 0); |
43cd72b9 BW |
10443 | tinsn_from_chars (&tinsn, fragP->fr_opcode, 0); |
10444 | ||
b5e4a23d | 10445 | if (fragP->tc_frag_data.is_aligning_branch == 1) |
43cd72b9 | 10446 | { |
9c2799c2 | 10447 | gas_assert (fragP->tc_frag_data.text_expansion[0] == 1 |
43cd72b9 BW |
10448 | || fragP->tc_frag_data.text_expansion[0] == 0); |
10449 | convert_frag_immed (segP, fragP, fragP->tc_frag_data.text_expansion[0], | |
10450 | fmt, slot); | |
10451 | return; | |
10452 | } | |
10453 | ||
10454 | if (fragP->tc_frag_data.text_expansion[0] == 0) | |
e0001a05 NC |
10455 | { |
10456 | /* No conversion. */ | |
10457 | fragP->fr_var = 0; | |
10458 | return; | |
10459 | } | |
10460 | ||
9c2799c2 | 10461 | gas_assert (fragP->fr_opcode != NULL); |
e0001a05 | 10462 | |
43cd72b9 BW |
10463 | /* Frags in this relaxation state should only contain |
10464 | single instruction bundles. */ | |
10465 | tinsn_immed_from_frag (&tinsn, fragP, 0); | |
e0001a05 NC |
10466 | |
10467 | /* Just convert it to a wide form.... */ | |
10468 | size = 0; | |
43cd72b9 | 10469 | old_size = xg_get_single_size (tinsn.opcode); |
e0001a05 NC |
10470 | |
10471 | tinsn_init (&single_target); | |
10472 | frag_offset = fragP->fr_opcode - fragP->fr_literal; | |
10473 | ||
84b08ed9 | 10474 | if (! xg_is_single_relaxable_insn (&tinsn, &single_target, FALSE)) |
43cd72b9 BW |
10475 | { |
10476 | as_bad (_("unable to widen instruction")); | |
10477 | return; | |
10478 | } | |
10479 | ||
10480 | size = xg_get_single_size (single_target.opcode); | |
b2d179be BW |
10481 | xg_emit_insn_to_buf (&single_target, fragP->fr_opcode, fragP, |
10482 | frag_offset, TRUE); | |
e0001a05 NC |
10483 | |
10484 | diff = size - old_size; | |
9c2799c2 NC |
10485 | gas_assert (diff >= 0); |
10486 | gas_assert (diff <= fragP->fr_var); | |
e0001a05 NC |
10487 | fragP->fr_var -= diff; |
10488 | fragP->fr_fix += diff; | |
10489 | ||
10490 | /* clean it up */ | |
10491 | fragP->fr_var = 0; | |
10492 | } | |
10493 | ||
10494 | ||
10495 | static void | |
7fa3d080 | 10496 | convert_frag_fill_nop (fragS *fragP) |
43cd72b9 BW |
10497 | { |
10498 | char *loc = &fragP->fr_literal[fragP->fr_fix]; | |
10499 | int size = fragP->tc_frag_data.text_expansion[0]; | |
9c2799c2 | 10500 | gas_assert ((unsigned) size == (fragP->fr_next->fr_address |
43cd72b9 BW |
10501 | - fragP->fr_address - fragP->fr_fix)); |
10502 | if (size == 0) | |
10503 | { | |
10504 | /* No conversion. */ | |
10505 | fragP->fr_var = 0; | |
10506 | return; | |
10507 | } | |
10508 | assemble_nop (size, loc); | |
10509 | fragP->tc_frag_data.is_insn = TRUE; | |
10510 | fragP->fr_var -= size; | |
10511 | fragP->fr_fix += size; | |
10512 | frag_wane (fragP); | |
10513 | } | |
10514 | ||
10515 | ||
7fa3d080 BW |
10516 | static fixS *fix_new_exp_in_seg |
10517 | (segT, subsegT, fragS *, int, int, expressionS *, int, | |
10518 | bfd_reloc_code_real_type); | |
10519 | static void convert_frag_immed_finish_loop (segT, fragS *, TInsn *); | |
10520 | ||
43cd72b9 | 10521 | static void |
7fa3d080 BW |
10522 | convert_frag_immed (segT segP, |
10523 | fragS *fragP, | |
10524 | int min_steps, | |
10525 | xtensa_format fmt, | |
10526 | int slot) | |
e0001a05 NC |
10527 | { |
10528 | char *immed_instr = fragP->fr_opcode; | |
43cd72b9 | 10529 | TInsn orig_tinsn; |
e0001a05 | 10530 | bfd_boolean expanded = FALSE; |
e0001a05 | 10531 | bfd_boolean branch_jmp_to_next = FALSE; |
43cd72b9 | 10532 | char *fr_opcode = fragP->fr_opcode; |
43cd72b9 | 10533 | xtensa_isa isa = xtensa_default_isa; |
def13efb | 10534 | bfd_boolean from_wide_insn = FALSE; |
43cd72b9 BW |
10535 | int bytes; |
10536 | bfd_boolean is_loop; | |
e0001a05 | 10537 | |
9c2799c2 | 10538 | gas_assert (fr_opcode != NULL); |
e0001a05 | 10539 | |
b5e4a23d | 10540 | xg_clear_vinsn (&cur_vinsn); |
e0001a05 | 10541 | |
b5e4a23d | 10542 | vinsn_from_chars (&cur_vinsn, fr_opcode); |
b2d179be | 10543 | if (cur_vinsn.num_slots > 1) |
def13efb | 10544 | from_wide_insn = TRUE; |
e0001a05 | 10545 | |
b5e4a23d | 10546 | orig_tinsn = cur_vinsn.slots[slot]; |
43cd72b9 BW |
10547 | tinsn_immed_from_frag (&orig_tinsn, fragP, slot); |
10548 | ||
10549 | is_loop = xtensa_opcode_is_loop (xtensa_default_isa, orig_tinsn.opcode) == 1; | |
e0001a05 | 10550 | |
b08b5071 | 10551 | if (workaround_b_j_loop_end && ! fragP->tc_frag_data.is_no_transform) |
43cd72b9 | 10552 | branch_jmp_to_next = is_branch_jmp_to_next (&orig_tinsn, fragP); |
e0001a05 NC |
10553 | |
10554 | if (branch_jmp_to_next && !next_frag_is_loop_target (fragP)) | |
10555 | { | |
10556 | /* Conversion just inserts a NOP and marks the fix as completed. */ | |
43cd72b9 BW |
10557 | bytes = xtensa_format_length (isa, fmt); |
10558 | if (bytes >= 4) | |
10559 | { | |
b5e4a23d BW |
10560 | cur_vinsn.slots[slot].opcode = |
10561 | xtensa_format_slot_nop_opcode (isa, cur_vinsn.format, slot); | |
10562 | cur_vinsn.slots[slot].ntok = 0; | |
43cd72b9 BW |
10563 | } |
10564 | else | |
10565 | { | |
10566 | bytes += fragP->tc_frag_data.text_expansion[0]; | |
9c2799c2 | 10567 | gas_assert (bytes == 2 || bytes == 3); |
b5e4a23d | 10568 | build_nop (&cur_vinsn.slots[0], bytes); |
43cd72b9 BW |
10569 | fragP->fr_fix += fragP->tc_frag_data.text_expansion[0]; |
10570 | } | |
e7da6241 | 10571 | vinsn_to_insnbuf (&cur_vinsn, fr_opcode, frag_now, TRUE); |
d77b99c9 | 10572 | xtensa_insnbuf_to_chars |
b5e4a23d | 10573 | (isa, cur_vinsn.insnbuf, (unsigned char *) fr_opcode, 0); |
e0001a05 NC |
10574 | fragP->fr_var = 0; |
10575 | } | |
7c834684 | 10576 | else |
e0001a05 | 10577 | { |
43cd72b9 BW |
10578 | /* Here is the fun stuff: Get the immediate field from this |
10579 | instruction. If it fits, we're done. If not, find the next | |
10580 | instruction sequence that fits. */ | |
10581 | ||
e0001a05 NC |
10582 | IStack istack; |
10583 | int i; | |
10584 | symbolS *lit_sym = NULL; | |
10585 | int total_size = 0; | |
43cd72b9 | 10586 | int target_offset = 0; |
e0001a05 NC |
10587 | int old_size; |
10588 | int diff; | |
10589 | symbolS *gen_label = NULL; | |
10590 | offsetT frag_offset; | |
43cd72b9 | 10591 | bfd_boolean first = TRUE; |
e0001a05 | 10592 | |
43cd72b9 | 10593 | /* It does not fit. Find something that does and |
e0001a05 | 10594 | convert immediately. */ |
43cd72b9 | 10595 | frag_offset = fr_opcode - fragP->fr_literal; |
e0001a05 | 10596 | istack_init (&istack); |
43cd72b9 | 10597 | xg_assembly_relax (&istack, &orig_tinsn, |
e0001a05 NC |
10598 | segP, fragP, frag_offset, min_steps, 0); |
10599 | ||
43cd72b9 | 10600 | old_size = xtensa_format_length (isa, fmt); |
e0001a05 NC |
10601 | |
10602 | /* Assemble this right inline. */ | |
10603 | ||
10604 | /* First, create the mapping from a label name to the REAL label. */ | |
43cd72b9 | 10605 | target_offset = 0; |
e0001a05 NC |
10606 | for (i = 0; i < istack.ninsn; i++) |
10607 | { | |
43cd72b9 | 10608 | TInsn *tinsn = &istack.insn[i]; |
e0001a05 NC |
10609 | fragS *lit_frag; |
10610 | ||
43cd72b9 | 10611 | switch (tinsn->insn_type) |
e0001a05 NC |
10612 | { |
10613 | case ITYPE_LITERAL: | |
10614 | if (lit_sym != NULL) | |
10615 | as_bad (_("multiple literals in expansion")); | |
10616 | /* First find the appropriate space in the literal pool. */ | |
43cd72b9 | 10617 | lit_frag = fragP->tc_frag_data.literal_frags[slot]; |
e0001a05 NC |
10618 | if (lit_frag == NULL) |
10619 | as_bad (_("no registered fragment for literal")); | |
43cd72b9 | 10620 | if (tinsn->ntok != 1) |
e0001a05 NC |
10621 | as_bad (_("number of literal tokens != 1")); |
10622 | ||
10623 | /* Set the literal symbol and add a fixup. */ | |
10624 | lit_sym = lit_frag->fr_symbol; | |
10625 | break; | |
10626 | ||
10627 | case ITYPE_LABEL: | |
43cd72b9 BW |
10628 | if (align_targets && !is_loop) |
10629 | { | |
10630 | fragS *unreach = fragP->fr_next; | |
10631 | while (!(unreach->fr_type == rs_machine_dependent | |
10632 | && (unreach->fr_subtype == RELAX_MAYBE_UNREACHABLE | |
10633 | || unreach->fr_subtype == RELAX_UNREACHABLE))) | |
10634 | { | |
10635 | unreach = unreach->fr_next; | |
10636 | } | |
10637 | ||
9c2799c2 | 10638 | gas_assert (unreach->fr_type == rs_machine_dependent |
43cd72b9 BW |
10639 | && (unreach->fr_subtype == RELAX_MAYBE_UNREACHABLE |
10640 | || unreach->fr_subtype == RELAX_UNREACHABLE)); | |
10641 | ||
10642 | target_offset += unreach->tc_frag_data.text_expansion[0]; | |
10643 | } | |
9c2799c2 | 10644 | gas_assert (gen_label == NULL); |
e0001a05 | 10645 | gen_label = symbol_new (FAKE_LABEL_NAME, now_seg, |
43cd72b9 BW |
10646 | fr_opcode - fragP->fr_literal |
10647 | + target_offset, fragP); | |
e0001a05 NC |
10648 | break; |
10649 | ||
10650 | case ITYPE_INSN: | |
def13efb | 10651 | if (first && from_wide_insn) |
43cd72b9 BW |
10652 | { |
10653 | target_offset += xtensa_format_length (isa, fmt); | |
10654 | first = FALSE; | |
10655 | if (!opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
10656 | target_offset += xg_get_single_size (tinsn->opcode); | |
10657 | } | |
10658 | else | |
10659 | target_offset += xg_get_single_size (tinsn->opcode); | |
e0001a05 NC |
10660 | break; |
10661 | } | |
10662 | } | |
10663 | ||
10664 | total_size = 0; | |
43cd72b9 | 10665 | first = TRUE; |
e0001a05 NC |
10666 | for (i = 0; i < istack.ninsn; i++) |
10667 | { | |
43cd72b9 | 10668 | TInsn *tinsn = &istack.insn[i]; |
e0001a05 NC |
10669 | fragS *lit_frag; |
10670 | int size; | |
10671 | segT target_seg; | |
43cd72b9 | 10672 | bfd_reloc_code_real_type reloc_type; |
e0001a05 | 10673 | |
43cd72b9 | 10674 | switch (tinsn->insn_type) |
e0001a05 NC |
10675 | { |
10676 | case ITYPE_LITERAL: | |
43cd72b9 BW |
10677 | lit_frag = fragP->tc_frag_data.literal_frags[slot]; |
10678 | /* Already checked. */ | |
9c2799c2 NC |
10679 | gas_assert (lit_frag != NULL); |
10680 | gas_assert (lit_sym != NULL); | |
10681 | gas_assert (tinsn->ntok == 1); | |
43cd72b9 | 10682 | /* Add a fixup. */ |
e0001a05 | 10683 | target_seg = S_GET_SEGMENT (lit_sym); |
9c2799c2 | 10684 | gas_assert (target_seg); |
28dbbc02 | 10685 | reloc_type = map_operator_to_reloc (tinsn->tok[0].X_op, TRUE); |
e0001a05 | 10686 | fix_new_exp_in_seg (target_seg, 0, lit_frag, 0, 4, |
43cd72b9 | 10687 | &tinsn->tok[0], FALSE, reloc_type); |
e0001a05 NC |
10688 | break; |
10689 | ||
10690 | case ITYPE_LABEL: | |
10691 | break; | |
10692 | ||
10693 | case ITYPE_INSN: | |
43cd72b9 BW |
10694 | xg_resolve_labels (tinsn, gen_label); |
10695 | xg_resolve_literals (tinsn, lit_sym); | |
def13efb | 10696 | if (from_wide_insn && first) |
43cd72b9 BW |
10697 | { |
10698 | first = FALSE; | |
10699 | if (opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
10700 | { | |
b5e4a23d | 10701 | cur_vinsn.slots[slot] = *tinsn; |
43cd72b9 BW |
10702 | } |
10703 | else | |
10704 | { | |
b5e4a23d | 10705 | cur_vinsn.slots[slot].opcode = |
43cd72b9 | 10706 | xtensa_format_slot_nop_opcode (isa, fmt, slot); |
b5e4a23d | 10707 | cur_vinsn.slots[slot].ntok = 0; |
43cd72b9 | 10708 | } |
b5e4a23d BW |
10709 | vinsn_to_insnbuf (&cur_vinsn, immed_instr, fragP, TRUE); |
10710 | xtensa_insnbuf_to_chars (isa, cur_vinsn.insnbuf, | |
d77b99c9 | 10711 | (unsigned char *) immed_instr, 0); |
43cd72b9 BW |
10712 | fragP->tc_frag_data.is_insn = TRUE; |
10713 | size = xtensa_format_length (isa, fmt); | |
10714 | if (!opcode_fits_format_slot (tinsn->opcode, fmt, slot)) | |
10715 | { | |
43cd72b9 | 10716 | xg_emit_insn_to_buf |
b2d179be | 10717 | (tinsn, immed_instr + size, fragP, |
43cd72b9 BW |
10718 | immed_instr - fragP->fr_literal + size, TRUE); |
10719 | size += xg_get_single_size (tinsn->opcode); | |
10720 | } | |
10721 | } | |
10722 | else | |
10723 | { | |
43cd72b9 | 10724 | size = xg_get_single_size (tinsn->opcode); |
b2d179be | 10725 | xg_emit_insn_to_buf (tinsn, immed_instr, fragP, |
43cd72b9 | 10726 | immed_instr - fragP->fr_literal, TRUE); |
43cd72b9 | 10727 | } |
e0001a05 | 10728 | immed_instr += size; |
43cd72b9 | 10729 | total_size += size; |
e0001a05 NC |
10730 | break; |
10731 | } | |
10732 | } | |
10733 | ||
10734 | diff = total_size - old_size; | |
9c2799c2 | 10735 | gas_assert (diff >= 0); |
e0001a05 NC |
10736 | if (diff != 0) |
10737 | expanded = TRUE; | |
9c2799c2 | 10738 | gas_assert (diff <= fragP->fr_var); |
e0001a05 NC |
10739 | fragP->fr_var -= diff; |
10740 | fragP->fr_fix += diff; | |
10741 | } | |
10742 | ||
e0001a05 | 10743 | /* Check for undefined immediates in LOOP instructions. */ |
43cd72b9 | 10744 | if (is_loop) |
e0001a05 NC |
10745 | { |
10746 | symbolS *sym; | |
43cd72b9 | 10747 | sym = orig_tinsn.tok[1].X_add_symbol; |
e0001a05 NC |
10748 | if (sym != NULL && !S_IS_DEFINED (sym)) |
10749 | { | |
10750 | as_bad (_("unresolved loop target symbol: %s"), S_GET_NAME (sym)); | |
10751 | return; | |
10752 | } | |
43cd72b9 | 10753 | sym = orig_tinsn.tok[1].X_op_symbol; |
e0001a05 NC |
10754 | if (sym != NULL && !S_IS_DEFINED (sym)) |
10755 | { | |
10756 | as_bad (_("unresolved loop target symbol: %s"), S_GET_NAME (sym)); | |
10757 | return; | |
10758 | } | |
10759 | } | |
10760 | ||
43cd72b9 BW |
10761 | if (expanded && xtensa_opcode_is_loop (isa, orig_tinsn.opcode) == 1) |
10762 | convert_frag_immed_finish_loop (segP, fragP, &orig_tinsn); | |
e0001a05 | 10763 | |
43cd72b9 | 10764 | if (expanded && is_direct_call_opcode (orig_tinsn.opcode)) |
e0001a05 NC |
10765 | { |
10766 | /* Add an expansion note on the expanded instruction. */ | |
10767 | fix_new_exp_in_seg (now_seg, 0, fragP, fr_opcode - fragP->fr_literal, 4, | |
43cd72b9 | 10768 | &orig_tinsn.tok[0], TRUE, |
e0001a05 | 10769 | BFD_RELOC_XTENSA_ASM_EXPAND); |
e0001a05 NC |
10770 | } |
10771 | } | |
10772 | ||
10773 | ||
10774 | /* Add a new fix expression into the desired segment. We have to | |
10775 | switch to that segment to do this. */ | |
10776 | ||
10777 | static fixS * | |
7fa3d080 BW |
10778 | fix_new_exp_in_seg (segT new_seg, |
10779 | subsegT new_subseg, | |
10780 | fragS *frag, | |
10781 | int where, | |
10782 | int size, | |
10783 | expressionS *exp, | |
10784 | int pcrel, | |
10785 | bfd_reloc_code_real_type r_type) | |
e0001a05 NC |
10786 | { |
10787 | fixS *new_fix; | |
10788 | segT seg = now_seg; | |
10789 | subsegT subseg = now_subseg; | |
43cd72b9 | 10790 | |
9c2799c2 | 10791 | gas_assert (new_seg != 0); |
e0001a05 NC |
10792 | subseg_set (new_seg, new_subseg); |
10793 | ||
e0001a05 NC |
10794 | new_fix = fix_new_exp (frag, where, size, exp, pcrel, r_type); |
10795 | subseg_set (seg, subseg); | |
10796 | return new_fix; | |
10797 | } | |
10798 | ||
10799 | ||
43cd72b9 BW |
10800 | /* Relax a loop instruction so that it can span loop >256 bytes. |
10801 | ||
10802 | loop as, .L1 | |
10803 | .L0: | |
10804 | rsr as, LEND | |
10805 | wsr as, LBEG | |
10806 | addi as, as, lo8 (label-.L1) | |
10807 | addmi as, as, mid8 (label-.L1) | |
10808 | wsr as, LEND | |
10809 | isync | |
10810 | rsr as, LCOUNT | |
10811 | addi as, as, 1 | |
10812 | .L1: | |
10813 | <<body>> | |
10814 | label: | |
10815 | */ | |
e0001a05 NC |
10816 | |
10817 | static void | |
7fa3d080 | 10818 | convert_frag_immed_finish_loop (segT segP, fragS *fragP, TInsn *tinsn) |
e0001a05 NC |
10819 | { |
10820 | TInsn loop_insn; | |
10821 | TInsn addi_insn; | |
10822 | TInsn addmi_insn; | |
10823 | unsigned long target; | |
10824 | static xtensa_insnbuf insnbuf = NULL; | |
10825 | unsigned int loop_length, loop_length_hi, loop_length_lo; | |
10826 | xtensa_isa isa = xtensa_default_isa; | |
10827 | addressT loop_offset; | |
10828 | addressT addi_offset = 9; | |
10829 | addressT addmi_offset = 12; | |
43cd72b9 | 10830 | fragS *next_fragP; |
d77b99c9 | 10831 | int target_count; |
e0001a05 NC |
10832 | |
10833 | if (!insnbuf) | |
10834 | insnbuf = xtensa_insnbuf_alloc (isa); | |
10835 | ||
10836 | /* Get the loop offset. */ | |
43cd72b9 | 10837 | loop_offset = get_expanded_loop_offset (tinsn->opcode); |
e0001a05 | 10838 | |
43cd72b9 BW |
10839 | /* Validate that there really is a LOOP at the loop_offset. Because |
10840 | loops are not bundleable, we can assume that the instruction will be | |
10841 | in slot 0. */ | |
10842 | tinsn_from_chars (&loop_insn, fragP->fr_opcode + loop_offset, 0); | |
10843 | tinsn_immed_from_frag (&loop_insn, fragP, 0); | |
10844 | ||
9c2799c2 | 10845 | gas_assert (xtensa_opcode_is_loop (isa, loop_insn.opcode) == 1); |
e0001a05 NC |
10846 | addi_offset += loop_offset; |
10847 | addmi_offset += loop_offset; | |
10848 | ||
9c2799c2 | 10849 | gas_assert (tinsn->ntok == 2); |
b08b5071 BW |
10850 | if (tinsn->tok[1].X_op == O_constant) |
10851 | target = tinsn->tok[1].X_add_number; | |
10852 | else if (tinsn->tok[1].X_op == O_symbol) | |
10853 | { | |
10854 | /* Find the fragment. */ | |
10855 | symbolS *sym = tinsn->tok[1].X_add_symbol; | |
9c2799c2 | 10856 | gas_assert (S_GET_SEGMENT (sym) == segP |
b08b5071 BW |
10857 | || S_GET_SEGMENT (sym) == absolute_section); |
10858 | target = (S_GET_VALUE (sym) + tinsn->tok[1].X_add_number); | |
10859 | } | |
10860 | else | |
10861 | { | |
10862 | as_bad (_("invalid expression evaluation type %d"), tinsn->tok[1].X_op); | |
10863 | target = 0; | |
10864 | } | |
e0001a05 | 10865 | |
e0001a05 NC |
10866 | loop_length = target - (fragP->fr_address + fragP->fr_fix); |
10867 | loop_length_hi = loop_length & ~0x0ff; | |
10868 | loop_length_lo = loop_length & 0x0ff; | |
10869 | if (loop_length_lo >= 128) | |
10870 | { | |
10871 | loop_length_lo -= 256; | |
10872 | loop_length_hi += 256; | |
10873 | } | |
10874 | ||
43cd72b9 | 10875 | /* Because addmi sign-extends the immediate, 'loop_length_hi' can be at most |
e0001a05 NC |
10876 | 32512. If the loop is larger than that, then we just fail. */ |
10877 | if (loop_length_hi > 32512) | |
10878 | as_bad_where (fragP->fr_file, fragP->fr_line, | |
10879 | _("loop too long for LOOP instruction")); | |
10880 | ||
43cd72b9 | 10881 | tinsn_from_chars (&addi_insn, fragP->fr_opcode + addi_offset, 0); |
9c2799c2 | 10882 | gas_assert (addi_insn.opcode == xtensa_addi_opcode); |
e0001a05 | 10883 | |
43cd72b9 | 10884 | tinsn_from_chars (&addmi_insn, fragP->fr_opcode + addmi_offset, 0); |
9c2799c2 | 10885 | gas_assert (addmi_insn.opcode == xtensa_addmi_opcode); |
e0001a05 NC |
10886 | |
10887 | set_expr_const (&addi_insn.tok[2], loop_length_lo); | |
10888 | tinsn_to_insnbuf (&addi_insn, insnbuf); | |
43cd72b9 | 10889 | |
e0001a05 | 10890 | fragP->tc_frag_data.is_insn = TRUE; |
d77b99c9 BW |
10891 | xtensa_insnbuf_to_chars |
10892 | (isa, insnbuf, (unsigned char *) fragP->fr_opcode + addi_offset, 0); | |
e0001a05 NC |
10893 | |
10894 | set_expr_const (&addmi_insn.tok[2], loop_length_hi); | |
10895 | tinsn_to_insnbuf (&addmi_insn, insnbuf); | |
d77b99c9 BW |
10896 | xtensa_insnbuf_to_chars |
10897 | (isa, insnbuf, (unsigned char *) fragP->fr_opcode + addmi_offset, 0); | |
43cd72b9 BW |
10898 | |
10899 | /* Walk through all of the frags from here to the loop end | |
10900 | and mark them as no_transform to keep them from being modified | |
10901 | by the linker. If we ever have a relocation for the | |
10902 | addi/addmi of the difference of two symbols we can remove this. */ | |
10903 | ||
10904 | target_count = 0; | |
10905 | for (next_fragP = fragP; next_fragP != NULL; | |
10906 | next_fragP = next_fragP->fr_next) | |
10907 | { | |
b08b5071 | 10908 | next_fragP->tc_frag_data.is_no_transform = TRUE; |
43cd72b9 BW |
10909 | if (next_fragP->tc_frag_data.is_loop_target) |
10910 | target_count++; | |
10911 | if (target_count == 2) | |
10912 | break; | |
10913 | } | |
e0001a05 NC |
10914 | } |
10915 | ||
b08b5071 BW |
10916 | \f |
10917 | /* A map that keeps information on a per-subsegment basis. This is | |
10918 | maintained during initial assembly, but is invalid once the | |
10919 | subsegments are smashed together. I.E., it cannot be used during | |
10920 | the relaxation. */ | |
e0001a05 | 10921 | |
b08b5071 | 10922 | typedef struct subseg_map_struct |
e0001a05 | 10923 | { |
b08b5071 BW |
10924 | /* the key */ |
10925 | segT seg; | |
10926 | subsegT subseg; | |
e0001a05 | 10927 | |
b08b5071 BW |
10928 | /* the data */ |
10929 | unsigned flags; | |
10930 | float total_freq; /* fall-through + branch target frequency */ | |
10931 | float target_freq; /* branch target frequency alone */ | |
10932 | ||
10933 | struct subseg_map_struct *next; | |
10934 | } subseg_map; | |
e0001a05 | 10935 | |
e0001a05 | 10936 | |
e0001a05 NC |
10937 | static subseg_map *sseg_map = NULL; |
10938 | ||
43cd72b9 | 10939 | static subseg_map * |
7fa3d080 | 10940 | get_subseg_info (segT seg, subsegT subseg) |
e0001a05 NC |
10941 | { |
10942 | subseg_map *subseg_e; | |
10943 | ||
10944 | for (subseg_e = sseg_map; subseg_e; subseg_e = subseg_e->next) | |
e0001a05 | 10945 | { |
43cd72b9 | 10946 | if (seg == subseg_e->seg && subseg == subseg_e->subseg) |
b08b5071 | 10947 | break; |
e0001a05 | 10948 | } |
b08b5071 BW |
10949 | return subseg_e; |
10950 | } | |
10951 | ||
10952 | ||
10953 | static subseg_map * | |
10954 | add_subseg_info (segT seg, subsegT subseg) | |
10955 | { | |
325801bd | 10956 | subseg_map *subseg_e = XNEW (subseg_map); |
43cd72b9 BW |
10957 | memset (subseg_e, 0, sizeof (subseg_map)); |
10958 | subseg_e->seg = seg; | |
10959 | subseg_e->subseg = subseg; | |
10960 | subseg_e->flags = 0; | |
10961 | /* Start off considering every branch target very important. */ | |
b08b5071 BW |
10962 | subseg_e->target_freq = 1.0; |
10963 | subseg_e->total_freq = 1.0; | |
43cd72b9 BW |
10964 | subseg_e->next = sseg_map; |
10965 | sseg_map = subseg_e; | |
43cd72b9 BW |
10966 | return subseg_e; |
10967 | } | |
e0001a05 | 10968 | |
7fa3d080 BW |
10969 | |
10970 | static unsigned | |
10971 | get_last_insn_flags (segT seg, subsegT subseg) | |
10972 | { | |
10973 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
b08b5071 BW |
10974 | if (subseg_e) |
10975 | return subseg_e->flags; | |
10976 | return 0; | |
7fa3d080 BW |
10977 | } |
10978 | ||
10979 | ||
43cd72b9 | 10980 | static void |
7fa3d080 BW |
10981 | set_last_insn_flags (segT seg, |
10982 | subsegT subseg, | |
10983 | unsigned fl, | |
10984 | bfd_boolean val) | |
43cd72b9 BW |
10985 | { |
10986 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
b08b5071 BW |
10987 | if (! subseg_e) |
10988 | subseg_e = add_subseg_info (seg, subseg); | |
e0001a05 NC |
10989 | if (val) |
10990 | subseg_e->flags |= fl; | |
10991 | else | |
10992 | subseg_e->flags &= ~fl; | |
10993 | } | |
10994 | ||
b08b5071 BW |
10995 | |
10996 | static float | |
10997 | get_subseg_total_freq (segT seg, subsegT subseg) | |
10998 | { | |
10999 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
11000 | if (subseg_e) | |
11001 | return subseg_e->total_freq; | |
11002 | return 1.0; | |
11003 | } | |
11004 | ||
11005 | ||
11006 | static float | |
11007 | get_subseg_target_freq (segT seg, subsegT subseg) | |
11008 | { | |
11009 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
11010 | if (subseg_e) | |
11011 | return subseg_e->target_freq; | |
11012 | return 1.0; | |
11013 | } | |
11014 | ||
11015 | ||
11016 | static void | |
11017 | set_subseg_freq (segT seg, subsegT subseg, float total_f, float target_f) | |
11018 | { | |
11019 | subseg_map *subseg_e = get_subseg_info (seg, subseg); | |
11020 | if (! subseg_e) | |
11021 | subseg_e = add_subseg_info (seg, subseg); | |
11022 | subseg_e->total_freq = total_f; | |
11023 | subseg_e->target_freq = target_f; | |
11024 | } | |
11025 | ||
e0001a05 NC |
11026 | \f |
11027 | /* Segment Lists and emit_state Stuff. */ | |
11028 | ||
e0001a05 | 11029 | static void |
7fa3d080 | 11030 | xtensa_move_seg_list_to_beginning (seg_list *head) |
e0001a05 NC |
11031 | { |
11032 | head = head->next; | |
11033 | while (head) | |
11034 | { | |
11035 | segT literal_section = head->seg; | |
11036 | ||
11037 | /* Move the literal section to the front of the section list. */ | |
9c2799c2 | 11038 | gas_assert (literal_section); |
69852798 AM |
11039 | if (literal_section != stdoutput->sections) |
11040 | { | |
11041 | bfd_section_list_remove (stdoutput, literal_section); | |
11042 | bfd_section_list_prepend (stdoutput, literal_section); | |
11043 | } | |
e0001a05 NC |
11044 | head = head->next; |
11045 | } | |
11046 | } | |
11047 | ||
11048 | ||
7fa3d080 BW |
11049 | static void mark_literal_frags (seg_list *); |
11050 | ||
947fa914 MF |
11051 | static void |
11052 | xg_promote_candidate_litpool (struct litpool_seg *lps, | |
11053 | struct litpool_frag *lp) | |
11054 | { | |
11055 | fragS *poolbeg; | |
11056 | fragS *poolend; | |
11057 | symbolS *lsym; | |
11058 | char label[10 + 2 * sizeof (fragS *)]; | |
11059 | ||
11060 | poolbeg = lp->fragP; | |
11061 | lp->priority = 1; | |
11062 | poolbeg->fr_subtype = RELAX_LITERAL_POOL_BEGIN; | |
11063 | poolend = poolbeg->fr_next; | |
11064 | gas_assert (poolend->fr_type == rs_machine_dependent && | |
11065 | poolend->fr_subtype == RELAX_LITERAL_POOL_END); | |
11066 | /* Create a local symbol pointing to the | |
11067 | end of the pool. */ | |
11068 | sprintf (label, ".L0_LT_%p", poolbeg); | |
11069 | lsym = (symbolS *)local_symbol_make (label, lps->seg, | |
11070 | 0, poolend); | |
11071 | poolbeg->fr_symbol = lsym; | |
11072 | /* Rest is done in xtensa_relax_frag. */ | |
11073 | } | |
11074 | ||
7fa3d080 BW |
11075 | static void |
11076 | xtensa_move_literals (void) | |
e0001a05 NC |
11077 | { |
11078 | seg_list *segment; | |
11079 | frchainS *frchain_from, *frchain_to; | |
87975d2a | 11080 | fragS *search_frag, *next_frag, *literal_pool, *insert_after; |
e0001a05 NC |
11081 | fragS **frag_splice; |
11082 | emit_state state; | |
11083 | segT dest_seg; | |
11084 | fixS *fix, *next_fix, **fix_splice; | |
82e7541d | 11085 | sym_list *lit; |
b46824bd | 11086 | struct litpool_seg *lps; |
4111950f MF |
11087 | const char *init_name = INIT_SECTION_NAME; |
11088 | const char *fini_name = FINI_SECTION_NAME; | |
11089 | int init_name_len = strlen(init_name); | |
11090 | int fini_name_len = strlen(fini_name); | |
e0001a05 | 11091 | |
a7877748 | 11092 | mark_literal_frags (literal_head->next); |
e0001a05 NC |
11093 | |
11094 | if (use_literal_section) | |
11095 | return; | |
11096 | ||
b46824bd MF |
11097 | /* Assign addresses (rough estimates) to the potential literal pool locations |
11098 | and create new ones if the gaps are too large. */ | |
11099 | ||
11100 | for (lps = litpool_seg_list.next; lps; lps = lps->next) | |
11101 | { | |
11102 | frchainS *frchP = seg_info (lps->seg)->frchainP; | |
11103 | struct litpool_frag *lpf = lps->frag_list.next; | |
11104 | addressT addr = 0; | |
11105 | ||
11106 | for ( ; frchP; frchP = frchP->frch_next) | |
11107 | { | |
11108 | fragS *fragP; | |
11109 | for (fragP = frchP->frch_root; fragP; fragP = fragP->fr_next) | |
11110 | { | |
11111 | if (lpf && fragP == lpf->fragP) | |
11112 | { | |
11113 | gas_assert(fragP->fr_type == rs_machine_dependent && | |
11114 | (fragP->fr_subtype == RELAX_LITERAL_POOL_BEGIN || | |
11115 | fragP->fr_subtype == RELAX_LITERAL_POOL_CANDIDATE_BEGIN)); | |
11116 | /* Found a litpool location. */ | |
11117 | lpf->addr = addr; | |
11118 | lpf = lpf->next; | |
11119 | } | |
11120 | if (fragP->fr_type == rs_machine_dependent && | |
11121 | fragP->fr_subtype == RELAX_SLOTS) | |
11122 | { | |
11123 | int slot; | |
11124 | for (slot = 0; slot < MAX_SLOTS; slot++) | |
11125 | { | |
11126 | if (fragP->tc_frag_data.literal_frags[slot]) | |
11127 | { | |
11128 | /* L32R; point its literal to the nearest litpool | |
11129 | preferring non-"candidate" positions to avoid | |
11130 | the jump-around. */ | |
11131 | fragS *litfrag = fragP->tc_frag_data.literal_frags[slot]; | |
11132 | struct litpool_frag *lp = lpf->prev; | |
11133 | if (!lp->fragP) | |
11134 | { | |
11135 | break; | |
11136 | } | |
11137 | while (lp->fragP->fr_subtype == | |
11138 | RELAX_LITERAL_POOL_CANDIDATE_BEGIN) | |
11139 | { | |
11140 | lp = lp->prev; | |
11141 | if (lp->fragP == NULL) | |
11142 | { | |
11143 | /* End of list; have to bite the bullet. | |
11144 | Take the nearest. */ | |
11145 | lp = lpf->prev; | |
11146 | break; | |
11147 | } | |
11148 | /* Does it (conservatively) reach? */ | |
11149 | if (addr - lp->addr <= 128 * 1024) | |
11150 | { | |
11151 | if (lp->fragP->fr_subtype == RELAX_LITERAL_POOL_BEGIN) | |
11152 | { | |
11153 | /* Found a good one. */ | |
11154 | break; | |
11155 | } | |
11156 | else if (lp->prev->fragP && | |
11157 | addr - lp->prev->addr > 128 * 1024) | |
11158 | { | |
11159 | /* This is still a "candidate" but the next one | |
11160 | will be too far away, so revert to the nearest | |
11161 | one, convert it and add the jump around. */ | |
b46824bd | 11162 | lp = lpf->prev; |
947fa914 | 11163 | break; |
b46824bd MF |
11164 | } |
11165 | } | |
11166 | } | |
947fa914 MF |
11167 | |
11168 | /* Convert candidate and add the jump around. */ | |
11169 | if (lp->fragP->fr_subtype == | |
11170 | RELAX_LITERAL_POOL_CANDIDATE_BEGIN) | |
11171 | xg_promote_candidate_litpool (lps, lp); | |
11172 | ||
b46824bd MF |
11173 | if (! litfrag->tc_frag_data.literal_frag) |
11174 | { | |
11175 | /* Take earliest use of this literal to avoid | |
11176 | forward refs. */ | |
11177 | litfrag->tc_frag_data.literal_frag = lp->fragP; | |
11178 | } | |
11179 | } | |
11180 | } | |
11181 | } | |
11182 | addr += fragP->fr_fix; | |
11183 | if (fragP->fr_type == rs_fill) | |
11184 | addr += fragP->fr_offset; | |
11185 | } | |
11186 | } | |
11187 | } | |
11188 | ||
74869ac7 | 11189 | for (segment = literal_head->next; segment; segment = segment->next) |
e0001a05 | 11190 | { |
4111950f MF |
11191 | const char *seg_name = segment_name (segment->seg); |
11192 | ||
74869ac7 | 11193 | /* Keep the literals for .init and .fini in separate sections. */ |
4111950f MF |
11194 | if ((!memcmp (seg_name, init_name, init_name_len) && |
11195 | !strcmp (seg_name + init_name_len, ".literal")) || | |
11196 | (!memcmp (seg_name, fini_name, fini_name_len) && | |
11197 | !strcmp (seg_name + fini_name_len, ".literal"))) | |
74869ac7 BW |
11198 | continue; |
11199 | ||
e0001a05 NC |
11200 | frchain_from = seg_info (segment->seg)->frchainP; |
11201 | search_frag = frchain_from->frch_root; | |
11202 | literal_pool = NULL; | |
11203 | frchain_to = NULL; | |
11204 | frag_splice = &(frchain_from->frch_root); | |
11205 | ||
4de0562a | 11206 | while (search_frag && !search_frag->tc_frag_data.literal_frag) |
e0001a05 | 11207 | { |
9c2799c2 | 11208 | gas_assert (search_frag->fr_fix == 0 |
e0001a05 NC |
11209 | || search_frag->fr_type == rs_align); |
11210 | search_frag = search_frag->fr_next; | |
11211 | } | |
11212 | ||
4de0562a MF |
11213 | if (!search_frag) |
11214 | { | |
11215 | search_frag = frchain_from->frch_root; | |
11216 | as_bad_where (search_frag->fr_file, search_frag->fr_line, | |
11217 | _("literal pool location required for text-section-literals; specify with .literal_position")); | |
11218 | continue; | |
11219 | } | |
11220 | ||
9c2799c2 | 11221 | gas_assert (search_frag->tc_frag_data.literal_frag->fr_subtype |
e0001a05 NC |
11222 | == RELAX_LITERAL_POOL_BEGIN); |
11223 | xtensa_switch_section_emit_state (&state, segment->seg, 0); | |
11224 | ||
11225 | /* Make sure that all the frags in this series are closed, and | |
11226 | that there is at least one left over of zero-size. This | |
11227 | prevents us from making a segment with an frchain without any | |
11228 | frags in it. */ | |
11229 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 11230 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 11231 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); |
43cd72b9 | 11232 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 11233 | |
43cd72b9 | 11234 | while (search_frag != frag_now) |
e0001a05 NC |
11235 | { |
11236 | next_frag = search_frag->fr_next; | |
e0001a05 NC |
11237 | if (search_frag->tc_frag_data.literal_frag) |
11238 | { | |
11239 | literal_pool = search_frag->tc_frag_data.literal_frag; | |
9c2799c2 | 11240 | gas_assert (literal_pool->fr_subtype == RELAX_LITERAL_POOL_BEGIN); |
dd49a749 | 11241 | frchain_to = literal_pool->tc_frag_data.lit_frchain; |
9c2799c2 | 11242 | gas_assert (frchain_to); |
e0001a05 | 11243 | } |
b46824bd MF |
11244 | |
11245 | if (search_frag->fr_type == rs_fill && search_frag->fr_fix == 0) | |
11246 | { | |
11247 | /* Skip empty fill frags. */ | |
11248 | *frag_splice = next_frag; | |
11249 | search_frag = next_frag; | |
11250 | continue; | |
11251 | } | |
11252 | ||
11253 | if (search_frag->fr_type == rs_align) | |
11254 | { | |
11255 | /* Skip alignment frags, because the pool as a whole will be | |
11256 | aligned if used, and we don't want to force alignment if the | |
11257 | pool is unused. */ | |
11258 | *frag_splice = next_frag; | |
11259 | search_frag = next_frag; | |
11260 | continue; | |
11261 | } | |
11262 | ||
11263 | /* First, move the frag out of the literal section and | |
11264 | to the appropriate place. */ | |
11265 | ||
33eaf5de | 11266 | /* Insert an alignment frag at start of pool. */ |
b46824bd MF |
11267 | if (literal_pool->fr_next->fr_type == rs_machine_dependent && |
11268 | literal_pool->fr_next->fr_subtype == RELAX_LITERAL_POOL_END) | |
11269 | { | |
11270 | segT pool_seg = literal_pool->fr_next->tc_frag_data.lit_seg; | |
11271 | emit_state prev_state; | |
11272 | fragS *prev_frag; | |
11273 | fragS *align_frag; | |
11274 | xtensa_switch_section_emit_state (&prev_state, pool_seg, 0); | |
11275 | prev_frag = frag_now; | |
11276 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
11277 | align_frag = frag_now; | |
11278 | frag_align (2, 0, 0); | |
11279 | /* Splice it into the right place. */ | |
11280 | prev_frag->fr_next = align_frag->fr_next; | |
11281 | align_frag->fr_next = literal_pool->fr_next; | |
11282 | literal_pool->fr_next = align_frag; | |
11283 | /* Insert after this one. */ | |
11284 | literal_pool->tc_frag_data.literal_frag = align_frag; | |
11285 | xtensa_restore_emit_state (&prev_state); | |
11286 | } | |
c48aaca0 | 11287 | insert_after = literal_pool->tc_frag_data.literal_frag; |
dd49a749 | 11288 | dest_seg = insert_after->fr_next->tc_frag_data.lit_seg; |
b46824bd MF |
11289 | /* Skip align frag. */ |
11290 | if (insert_after->fr_next->fr_type == rs_align) | |
11291 | { | |
11292 | insert_after = insert_after->fr_next; | |
11293 | } | |
43cd72b9 | 11294 | |
e0001a05 NC |
11295 | *frag_splice = next_frag; |
11296 | search_frag->fr_next = insert_after->fr_next; | |
11297 | insert_after->fr_next = search_frag; | |
11298 | search_frag->tc_frag_data.lit_seg = dest_seg; | |
c48aaca0 | 11299 | literal_pool->tc_frag_data.literal_frag = search_frag; |
e0001a05 NC |
11300 | |
11301 | /* Now move any fixups associated with this frag to the | |
11302 | right section. */ | |
11303 | fix = frchain_from->fix_root; | |
11304 | fix_splice = &(frchain_from->fix_root); | |
11305 | while (fix) | |
11306 | { | |
11307 | next_fix = fix->fx_next; | |
11308 | if (fix->fx_frag == search_frag) | |
11309 | { | |
11310 | *fix_splice = next_fix; | |
11311 | fix->fx_next = frchain_to->fix_root; | |
11312 | frchain_to->fix_root = fix; | |
11313 | if (frchain_to->fix_tail == NULL) | |
11314 | frchain_to->fix_tail = fix; | |
11315 | } | |
11316 | else | |
11317 | fix_splice = &(fix->fx_next); | |
11318 | fix = next_fix; | |
11319 | } | |
11320 | search_frag = next_frag; | |
11321 | } | |
11322 | ||
11323 | if (frchain_from->fix_root != NULL) | |
11324 | { | |
11325 | frchain_from = seg_info (segment->seg)->frchainP; | |
11326 | as_warn (_("fixes not all moved from %s"), segment->seg->name); | |
11327 | ||
9c2799c2 | 11328 | gas_assert (frchain_from->fix_root == NULL); |
e0001a05 NC |
11329 | } |
11330 | frchain_from->fix_tail = NULL; | |
11331 | xtensa_restore_emit_state (&state); | |
e0001a05 NC |
11332 | } |
11333 | ||
82e7541d BW |
11334 | /* Now fix up the SEGMENT value for all the literal symbols. */ |
11335 | for (lit = literal_syms; lit; lit = lit->next) | |
11336 | { | |
11337 | symbolS *lit_sym = lit->sym; | |
91d6fa6a NC |
11338 | segT dseg = symbol_get_frag (lit_sym)->tc_frag_data.lit_seg; |
11339 | if (dseg) | |
11340 | S_SET_SEGMENT (lit_sym, dseg); | |
82e7541d | 11341 | } |
e0001a05 NC |
11342 | } |
11343 | ||
11344 | ||
a7877748 BW |
11345 | /* Walk over all the frags for segments in a list and mark them as |
11346 | containing literals. As clunky as this is, we can't rely on frag_var | |
11347 | and frag_variant to get called in all situations. */ | |
11348 | ||
11349 | static void | |
7fa3d080 | 11350 | mark_literal_frags (seg_list *segment) |
a7877748 BW |
11351 | { |
11352 | frchainS *frchain_from; | |
11353 | fragS *search_frag; | |
11354 | ||
11355 | while (segment) | |
11356 | { | |
11357 | frchain_from = seg_info (segment->seg)->frchainP; | |
11358 | search_frag = frchain_from->frch_root; | |
c138bc38 | 11359 | while (search_frag) |
a7877748 BW |
11360 | { |
11361 | search_frag->tc_frag_data.is_literal = TRUE; | |
11362 | search_frag = search_frag->fr_next; | |
11363 | } | |
11364 | segment = segment->next; | |
11365 | } | |
11366 | } | |
11367 | ||
11368 | ||
e0001a05 | 11369 | static void |
7fa3d080 | 11370 | xtensa_reorder_seg_list (seg_list *head, segT after) |
e0001a05 NC |
11371 | { |
11372 | /* Move all of the sections in the section list to come | |
11373 | after "after" in the gnu segment list. */ | |
11374 | ||
11375 | head = head->next; | |
11376 | while (head) | |
11377 | { | |
11378 | segT literal_section = head->seg; | |
11379 | ||
11380 | /* Move the literal section after "after". */ | |
9c2799c2 | 11381 | gas_assert (literal_section); |
e0001a05 NC |
11382 | if (literal_section != after) |
11383 | { | |
69852798 AM |
11384 | bfd_section_list_remove (stdoutput, literal_section); |
11385 | bfd_section_list_insert_after (stdoutput, after, literal_section); | |
e0001a05 NC |
11386 | } |
11387 | ||
11388 | head = head->next; | |
11389 | } | |
11390 | } | |
11391 | ||
11392 | ||
11393 | /* Push all the literal segments to the end of the gnu list. */ | |
11394 | ||
7fa3d080 BW |
11395 | static void |
11396 | xtensa_reorder_segments (void) | |
e0001a05 NC |
11397 | { |
11398 | segT sec; | |
b08b5071 | 11399 | segT last_sec = 0; |
e0001a05 NC |
11400 | int old_count = 0; |
11401 | int new_count = 0; | |
11402 | ||
11403 | for (sec = stdoutput->sections; sec != NULL; sec = sec->next) | |
b08b5071 BW |
11404 | { |
11405 | last_sec = sec; | |
11406 | old_count++; | |
11407 | } | |
e0001a05 NC |
11408 | |
11409 | /* Now that we have the last section, push all the literal | |
11410 | sections to the end. */ | |
e0001a05 | 11411 | xtensa_reorder_seg_list (literal_head, last_sec); |
e0001a05 NC |
11412 | |
11413 | /* Now perform the final error check. */ | |
11414 | for (sec = stdoutput->sections; sec != NULL; sec = sec->next) | |
11415 | new_count++; | |
9c2799c2 | 11416 | gas_assert (new_count == old_count); |
e0001a05 NC |
11417 | } |
11418 | ||
11419 | ||
e0001a05 NC |
11420 | /* Change the emit state (seg, subseg, and frag related stuff) to the |
11421 | correct location. Return a emit_state which can be passed to | |
11422 | xtensa_restore_emit_state to return to current fragment. */ | |
11423 | ||
7fa3d080 BW |
11424 | static void |
11425 | xtensa_switch_to_literal_fragment (emit_state *result) | |
43cd72b9 BW |
11426 | { |
11427 | if (directive_state[directive_absolute_literals]) | |
11428 | { | |
74869ac7 BW |
11429 | segT lit4_seg = cache_literal_section (TRUE); |
11430 | xtensa_switch_section_emit_state (result, lit4_seg, 0); | |
43cd72b9 BW |
11431 | } |
11432 | else | |
11433 | xtensa_switch_to_non_abs_literal_fragment (result); | |
11434 | ||
11435 | /* Do a 4-byte align here. */ | |
11436 | frag_align (2, 0, 0); | |
11437 | record_alignment (now_seg, 2); | |
11438 | } | |
11439 | ||
11440 | ||
7fa3d080 BW |
11441 | static void |
11442 | xtensa_switch_to_non_abs_literal_fragment (emit_state *result) | |
e0001a05 | 11443 | { |
e0001a05 | 11444 | fragS *pool_location = get_literal_pool_location (now_seg); |
74869ac7 | 11445 | segT lit_seg; |
c138bc38 | 11446 | bfd_boolean is_init = |
e0001a05 | 11447 | (now_seg && !strcmp (segment_name (now_seg), INIT_SECTION_NAME)); |
c138bc38 | 11448 | bfd_boolean is_fini = |
e0001a05 | 11449 | (now_seg && !strcmp (segment_name (now_seg), FINI_SECTION_NAME)); |
e0001a05 | 11450 | |
43cd72b9 BW |
11451 | if (pool_location == NULL |
11452 | && !use_literal_section | |
e0001a05 NC |
11453 | && !is_init && ! is_fini) |
11454 | { | |
b46824bd MF |
11455 | if (!auto_litpools) |
11456 | { | |
11457 | as_bad (_("literal pool location required for text-section-literals; specify with .literal_position")); | |
11458 | } | |
947fa914 MF |
11459 | xtensa_maybe_create_literal_pool_frag (TRUE, TRUE); |
11460 | pool_location = get_literal_pool_location (now_seg); | |
e0001a05 NC |
11461 | } |
11462 | ||
74869ac7 BW |
11463 | lit_seg = cache_literal_section (FALSE); |
11464 | xtensa_switch_section_emit_state (result, lit_seg, 0); | |
e0001a05 | 11465 | |
43cd72b9 BW |
11466 | if (!use_literal_section |
11467 | && !is_init && !is_fini | |
11468 | && get_literal_pool_location (now_seg) != pool_location) | |
e0001a05 NC |
11469 | { |
11470 | /* Close whatever frag is there. */ | |
11471 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 11472 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 NC |
11473 | frag_now->tc_frag_data.literal_frag = pool_location; |
11474 | frag_variant (rs_fill, 0, 0, 0, NULL, 0, NULL); | |
43cd72b9 | 11475 | xtensa_set_frag_assembly_state (frag_now); |
e0001a05 | 11476 | } |
e0001a05 NC |
11477 | } |
11478 | ||
11479 | ||
11480 | /* Call this function before emitting data into the literal section. | |
11481 | This is a helper function for xtensa_switch_to_literal_fragment. | |
11482 | This is similar to a .section new_now_seg subseg. */ | |
11483 | ||
7fa3d080 BW |
11484 | static void |
11485 | xtensa_switch_section_emit_state (emit_state *state, | |
11486 | segT new_now_seg, | |
11487 | subsegT new_now_subseg) | |
e0001a05 NC |
11488 | { |
11489 | state->name = now_seg->name; | |
11490 | state->now_seg = now_seg; | |
11491 | state->now_subseg = now_subseg; | |
11492 | state->generating_literals = generating_literals; | |
11493 | generating_literals++; | |
2b0210eb | 11494 | subseg_set (new_now_seg, new_now_subseg); |
e0001a05 NC |
11495 | } |
11496 | ||
11497 | ||
11498 | /* Use to restore the emitting into the normal place. */ | |
11499 | ||
7fa3d080 BW |
11500 | static void |
11501 | xtensa_restore_emit_state (emit_state *state) | |
e0001a05 NC |
11502 | { |
11503 | generating_literals = state->generating_literals; | |
2b0210eb | 11504 | subseg_set (state->now_seg, state->now_subseg); |
e0001a05 NC |
11505 | } |
11506 | ||
11507 | ||
74869ac7 | 11508 | /* Predicate function used to look up a section in a particular group. */ |
e0001a05 | 11509 | |
74869ac7 BW |
11510 | static bfd_boolean |
11511 | match_section_group (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf) | |
e0001a05 | 11512 | { |
74869ac7 BW |
11513 | const char *gname = inf; |
11514 | const char *group_name = elf_group_name (sec); | |
3739860c | 11515 | |
74869ac7 BW |
11516 | return (group_name == gname |
11517 | || (group_name != NULL | |
11518 | && gname != NULL | |
11519 | && strcmp (group_name, gname) == 0)); | |
11520 | } | |
e0001a05 | 11521 | |
e0001a05 | 11522 | |
74869ac7 BW |
11523 | /* Get the literal section to be used for the current text section. |
11524 | The result may be cached in the default_lit_sections structure. */ | |
11525 | ||
11526 | static segT | |
11527 | cache_literal_section (bfd_boolean use_abs_literals) | |
11528 | { | |
11529 | const char *text_name, *group_name = 0; | |
b9bb4a93 TS |
11530 | const char *base_name, *suffix; |
11531 | char *name; | |
74869ac7 BW |
11532 | segT *pcached; |
11533 | segT seg, current_section; | |
11534 | int current_subsec; | |
11535 | bfd_boolean linkonce = FALSE; | |
11536 | ||
11537 | /* Save the current section/subsection. */ | |
11538 | current_section = now_seg; | |
11539 | current_subsec = now_subseg; | |
11540 | ||
11541 | /* Clear the cached values if they are no longer valid. */ | |
11542 | if (now_seg != default_lit_sections.current_text_seg) | |
b08b5071 | 11543 | { |
74869ac7 BW |
11544 | default_lit_sections.current_text_seg = now_seg; |
11545 | default_lit_sections.lit_seg = NULL; | |
11546 | default_lit_sections.lit4_seg = NULL; | |
11547 | } | |
11548 | ||
11549 | /* Check if the literal section is already cached. */ | |
11550 | if (use_abs_literals) | |
11551 | pcached = &default_lit_sections.lit4_seg; | |
11552 | else | |
11553 | pcached = &default_lit_sections.lit_seg; | |
11554 | ||
11555 | if (*pcached) | |
11556 | return *pcached; | |
3739860c | 11557 | |
74869ac7 BW |
11558 | text_name = default_lit_sections.lit_prefix; |
11559 | if (! text_name || ! *text_name) | |
11560 | { | |
11561 | text_name = segment_name (current_section); | |
11562 | group_name = elf_group_name (current_section); | |
11563 | linkonce = (current_section->flags & SEC_LINK_ONCE) != 0; | |
11564 | } | |
11565 | ||
11566 | base_name = use_abs_literals ? ".lit4" : ".literal"; | |
11567 | if (group_name) | |
11568 | { | |
4ec9d7d5 | 11569 | name = concat (base_name, ".", group_name, (char *) NULL); |
74869ac7 BW |
11570 | } |
11571 | else if (strncmp (text_name, ".gnu.linkonce.", linkonce_len) == 0) | |
11572 | { | |
11573 | suffix = strchr (text_name + linkonce_len, '.'); | |
11574 | ||
4ec9d7d5 TS |
11575 | name = concat (".gnu.linkonce", base_name, suffix ? suffix : "", |
11576 | (char *) NULL); | |
74869ac7 BW |
11577 | linkonce = TRUE; |
11578 | } | |
11579 | else | |
11580 | { | |
a89c407e SA |
11581 | /* If the section name begins or ends with ".text", then replace |
11582 | that portion instead of appending an additional suffix. */ | |
74869ac7 | 11583 | size_t len = strlen (text_name); |
a89c407e SA |
11584 | if (len >= 5 |
11585 | && (strcmp (text_name + len - 5, ".text") == 0 | |
11586 | || strncmp (text_name, ".text", 5) == 0)) | |
74869ac7 BW |
11587 | len -= 5; |
11588 | ||
add39d23 | 11589 | name = XNEWVEC (char, len + strlen (base_name) + 1); |
a89c407e SA |
11590 | if (strncmp (text_name, ".text", 5) == 0) |
11591 | { | |
11592 | strcpy (name, base_name); | |
11593 | strcat (name, text_name + 5); | |
11594 | } | |
11595 | else | |
11596 | { | |
11597 | strcpy (name, text_name); | |
11598 | strcpy (name + len, base_name); | |
11599 | } | |
b08b5071 | 11600 | } |
e0001a05 | 11601 | |
74869ac7 BW |
11602 | /* Canonicalize section names to allow renaming literal sections. |
11603 | The group name, if any, came from the current text section and | |
11604 | has already been canonicalized. */ | |
11605 | name = tc_canonicalize_symbol_name (name); | |
11606 | ||
11607 | seg = bfd_get_section_by_name_if (stdoutput, name, match_section_group, | |
11608 | (void *) group_name); | |
11609 | if (! seg) | |
e0001a05 | 11610 | { |
74869ac7 BW |
11611 | flagword flags; |
11612 | ||
11613 | seg = subseg_force_new (name, 0); | |
11614 | ||
11615 | if (! use_abs_literals) | |
b08b5071 | 11616 | { |
74869ac7 | 11617 | /* Add the newly created literal segment to the list. */ |
325801bd | 11618 | seg_list *n = XNEW (seg_list); |
b08b5071 | 11619 | n->seg = seg; |
74869ac7 BW |
11620 | n->next = literal_head->next; |
11621 | literal_head->next = n; | |
b08b5071 | 11622 | } |
74869ac7 BW |
11623 | |
11624 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | SEC_ALLOC | SEC_LOAD | |
11625 | | (linkonce ? (SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD) : 0) | |
11626 | | (use_abs_literals ? SEC_DATA : SEC_CODE)); | |
11627 | ||
11628 | elf_group_name (seg) = group_name; | |
11629 | ||
11630 | bfd_set_section_flags (stdoutput, seg, flags); | |
b08b5071 | 11631 | bfd_set_section_alignment (stdoutput, seg, 2); |
e0001a05 NC |
11632 | } |
11633 | ||
74869ac7 | 11634 | *pcached = seg; |
b08b5071 | 11635 | subseg_set (current_section, current_subsec); |
74869ac7 | 11636 | return seg; |
e0001a05 NC |
11637 | } |
11638 | ||
43cd72b9 BW |
11639 | \f |
11640 | /* Property Tables Stuff. */ | |
11641 | ||
7fa3d080 BW |
11642 | #define XTENSA_INSN_SEC_NAME ".xt.insn" |
11643 | #define XTENSA_LIT_SEC_NAME ".xt.lit" | |
11644 | #define XTENSA_PROP_SEC_NAME ".xt.prop" | |
11645 | ||
11646 | typedef bfd_boolean (*frag_predicate) (const fragS *); | |
11647 | typedef void (*frag_flags_fn) (const fragS *, frag_flags *); | |
11648 | ||
b08b5071 | 11649 | static bfd_boolean get_frag_is_literal (const fragS *); |
7fa3d080 BW |
11650 | static void xtensa_create_property_segments |
11651 | (frag_predicate, frag_predicate, const char *, xt_section_type); | |
11652 | static void xtensa_create_xproperty_segments | |
11653 | (frag_flags_fn, const char *, xt_section_type); | |
532f93bd | 11654 | static bfd_boolean exclude_section_from_property_tables (segT); |
7fa3d080 BW |
11655 | static bfd_boolean section_has_property (segT, frag_predicate); |
11656 | static bfd_boolean section_has_xproperty (segT, frag_flags_fn); | |
11657 | static void add_xt_block_frags | |
542f8b94 | 11658 | (segT, xtensa_block_info **, frag_predicate, frag_predicate); |
7fa3d080 BW |
11659 | static bfd_boolean xtensa_frag_flags_is_empty (const frag_flags *); |
11660 | static void xtensa_frag_flags_init (frag_flags *); | |
11661 | static void get_frag_property_flags (const fragS *, frag_flags *); | |
2f1bf5c1 | 11662 | static flagword frag_flags_to_number (const frag_flags *); |
542f8b94 | 11663 | static void add_xt_prop_frags (segT, xtensa_block_info **, frag_flags_fn); |
7fa3d080 BW |
11664 | |
11665 | /* Set up property tables after relaxation. */ | |
11666 | ||
11667 | void | |
11668 | xtensa_post_relax_hook (void) | |
11669 | { | |
11670 | xtensa_move_seg_list_to_beginning (literal_head); | |
7fa3d080 BW |
11671 | |
11672 | xtensa_find_unmarked_state_frags (); | |
99ded152 | 11673 | xtensa_mark_frags_for_org (); |
6a7eedfe | 11674 | xtensa_mark_difference_of_two_symbols (); |
7fa3d080 | 11675 | |
b29757dc BW |
11676 | xtensa_create_property_segments (get_frag_is_literal, |
11677 | NULL, | |
11678 | XTENSA_LIT_SEC_NAME, | |
11679 | xt_literal_sec); | |
7fa3d080 BW |
11680 | xtensa_create_xproperty_segments (get_frag_property_flags, |
11681 | XTENSA_PROP_SEC_NAME, | |
11682 | xt_prop_sec); | |
11683 | ||
11684 | if (warn_unaligned_branch_targets) | |
11685 | bfd_map_over_sections (stdoutput, xtensa_find_unaligned_branch_targets, 0); | |
11686 | bfd_map_over_sections (stdoutput, xtensa_find_unaligned_loops, 0); | |
11687 | } | |
11688 | ||
11689 | ||
43cd72b9 BW |
11690 | /* This function is only meaningful after xtensa_move_literals. */ |
11691 | ||
11692 | static bfd_boolean | |
7fa3d080 | 11693 | get_frag_is_literal (const fragS *fragP) |
43cd72b9 | 11694 | { |
9c2799c2 | 11695 | gas_assert (fragP != NULL); |
43cd72b9 BW |
11696 | return fragP->tc_frag_data.is_literal; |
11697 | } | |
11698 | ||
11699 | ||
43cd72b9 | 11700 | static void |
7fa3d080 BW |
11701 | xtensa_create_property_segments (frag_predicate property_function, |
11702 | frag_predicate end_property_function, | |
11703 | const char *section_name_base, | |
11704 | xt_section_type sec_type) | |
43cd72b9 BW |
11705 | { |
11706 | segT *seclist; | |
11707 | ||
11708 | /* Walk over all of the current segments. | |
11709 | Walk over each fragment | |
11710 | For each non-empty fragment, | |
11711 | Build a property record (append where possible). */ | |
11712 | ||
11713 | for (seclist = &stdoutput->sections; | |
11714 | seclist && *seclist; | |
11715 | seclist = &(*seclist)->next) | |
11716 | { | |
11717 | segT sec = *seclist; | |
43cd72b9 | 11718 | |
532f93bd | 11719 | if (exclude_section_from_property_tables (sec)) |
43cd72b9 BW |
11720 | continue; |
11721 | ||
11722 | if (section_has_property (sec, property_function)) | |
11723 | { | |
542f8b94 BW |
11724 | segment_info_type *xt_seg_info; |
11725 | xtensa_block_info **xt_blocks; | |
51c8ebc1 | 11726 | segT prop_sec = xtensa_make_property_section (sec, section_name_base); |
542f8b94 BW |
11727 | |
11728 | prop_sec->output_section = prop_sec; | |
11729 | subseg_set (prop_sec, 0); | |
11730 | xt_seg_info = seg_info (prop_sec); | |
11731 | xt_blocks = &xt_seg_info->tc_segment_info_data.blocks[sec_type]; | |
11732 | ||
43cd72b9 | 11733 | /* Walk over all of the frchains here and add new sections. */ |
542f8b94 | 11734 | add_xt_block_frags (sec, xt_blocks, property_function, |
43cd72b9 BW |
11735 | end_property_function); |
11736 | } | |
11737 | } | |
11738 | ||
11739 | /* Now we fill them out.... */ | |
11740 | ||
11741 | for (seclist = &stdoutput->sections; | |
11742 | seclist && *seclist; | |
11743 | seclist = &(*seclist)->next) | |
11744 | { | |
11745 | segment_info_type *seginfo; | |
11746 | xtensa_block_info *block; | |
11747 | segT sec = *seclist; | |
11748 | ||
11749 | seginfo = seg_info (sec); | |
11750 | block = seginfo->tc_segment_info_data.blocks[sec_type]; | |
11751 | ||
11752 | if (block) | |
11753 | { | |
11754 | xtensa_block_info *cur_block; | |
43cd72b9 | 11755 | int num_recs = 0; |
d77b99c9 | 11756 | bfd_size_type rec_size; |
43cd72b9 BW |
11757 | |
11758 | for (cur_block = block; cur_block; cur_block = cur_block->next) | |
11759 | num_recs++; | |
11760 | ||
11761 | rec_size = num_recs * 8; | |
11762 | bfd_set_section_size (stdoutput, sec, rec_size); | |
11763 | ||
43cd72b9 BW |
11764 | if (num_recs) |
11765 | { | |
43cd72b9 | 11766 | char *frag_data; |
542f8b94 | 11767 | int i; |
43cd72b9 | 11768 | |
542f8b94 BW |
11769 | subseg_set (sec, 0); |
11770 | frag_data = frag_more (rec_size); | |
43cd72b9 | 11771 | cur_block = block; |
43cd72b9 BW |
11772 | for (i = 0; i < num_recs; i++) |
11773 | { | |
542f8b94 | 11774 | fixS *fix; |
e0001a05 | 11775 | |
43cd72b9 | 11776 | /* Write the fixup. */ |
9c2799c2 | 11777 | gas_assert (cur_block); |
542f8b94 BW |
11778 | fix = fix_new (frag_now, i * 8, 4, |
11779 | section_symbol (cur_block->sec), | |
11780 | cur_block->offset, | |
11781 | FALSE, BFD_RELOC_32); | |
11782 | fix->fx_file = "<internal>"; | |
43cd72b9 | 11783 | fix->fx_line = 0; |
e0001a05 | 11784 | |
43cd72b9 | 11785 | /* Write the length. */ |
542f8b94 | 11786 | md_number_to_chars (&frag_data[4 + i * 8], |
43cd72b9 BW |
11787 | cur_block->size, 4); |
11788 | cur_block = cur_block->next; | |
11789 | } | |
542f8b94 BW |
11790 | frag_wane (frag_now); |
11791 | frag_new (0); | |
11792 | frag_wane (frag_now); | |
43cd72b9 BW |
11793 | } |
11794 | } | |
11795 | } | |
e0001a05 NC |
11796 | } |
11797 | ||
11798 | ||
7fa3d080 BW |
11799 | static void |
11800 | xtensa_create_xproperty_segments (frag_flags_fn flag_fn, | |
11801 | const char *section_name_base, | |
11802 | xt_section_type sec_type) | |
e0001a05 NC |
11803 | { |
11804 | segT *seclist; | |
11805 | ||
11806 | /* Walk over all of the current segments. | |
43cd72b9 BW |
11807 | Walk over each fragment. |
11808 | For each fragment that has instructions, | |
11809 | build an instruction record (append where possible). */ | |
e0001a05 NC |
11810 | |
11811 | for (seclist = &stdoutput->sections; | |
11812 | seclist && *seclist; | |
11813 | seclist = &(*seclist)->next) | |
11814 | { | |
11815 | segT sec = *seclist; | |
43cd72b9 | 11816 | |
532f93bd | 11817 | if (exclude_section_from_property_tables (sec)) |
43cd72b9 BW |
11818 | continue; |
11819 | ||
11820 | if (section_has_xproperty (sec, flag_fn)) | |
e0001a05 | 11821 | { |
542f8b94 BW |
11822 | segment_info_type *xt_seg_info; |
11823 | xtensa_block_info **xt_blocks; | |
51c8ebc1 | 11824 | segT prop_sec = xtensa_make_property_section (sec, section_name_base); |
542f8b94 BW |
11825 | |
11826 | prop_sec->output_section = prop_sec; | |
11827 | subseg_set (prop_sec, 0); | |
11828 | xt_seg_info = seg_info (prop_sec); | |
11829 | xt_blocks = &xt_seg_info->tc_segment_info_data.blocks[sec_type]; | |
11830 | ||
e0001a05 | 11831 | /* Walk over all of the frchains here and add new sections. */ |
542f8b94 | 11832 | add_xt_prop_frags (sec, xt_blocks, flag_fn); |
e0001a05 NC |
11833 | } |
11834 | } | |
11835 | ||
11836 | /* Now we fill them out.... */ | |
11837 | ||
11838 | for (seclist = &stdoutput->sections; | |
11839 | seclist && *seclist; | |
11840 | seclist = &(*seclist)->next) | |
11841 | { | |
11842 | segment_info_type *seginfo; | |
11843 | xtensa_block_info *block; | |
11844 | segT sec = *seclist; | |
43cd72b9 | 11845 | |
e0001a05 NC |
11846 | seginfo = seg_info (sec); |
11847 | block = seginfo->tc_segment_info_data.blocks[sec_type]; | |
11848 | ||
11849 | if (block) | |
11850 | { | |
11851 | xtensa_block_info *cur_block; | |
43cd72b9 | 11852 | int num_recs = 0; |
d77b99c9 | 11853 | bfd_size_type rec_size; |
e0001a05 NC |
11854 | |
11855 | for (cur_block = block; cur_block; cur_block = cur_block->next) | |
11856 | num_recs++; | |
11857 | ||
43cd72b9 | 11858 | rec_size = num_recs * (8 + 4); |
e0001a05 | 11859 | bfd_set_section_size (stdoutput, sec, rec_size); |
43cd72b9 BW |
11860 | /* elf_section_data (sec)->this_hdr.sh_entsize = 12; */ |
11861 | ||
e0001a05 NC |
11862 | if (num_recs) |
11863 | { | |
e0001a05 | 11864 | char *frag_data; |
542f8b94 | 11865 | int i; |
e0001a05 | 11866 | |
542f8b94 BW |
11867 | subseg_set (sec, 0); |
11868 | frag_data = frag_more (rec_size); | |
e0001a05 | 11869 | cur_block = block; |
e0001a05 NC |
11870 | for (i = 0; i < num_recs; i++) |
11871 | { | |
542f8b94 | 11872 | fixS *fix; |
e0001a05 NC |
11873 | |
11874 | /* Write the fixup. */ | |
9c2799c2 | 11875 | gas_assert (cur_block); |
542f8b94 BW |
11876 | fix = fix_new (frag_now, i * 12, 4, |
11877 | section_symbol (cur_block->sec), | |
11878 | cur_block->offset, | |
11879 | FALSE, BFD_RELOC_32); | |
11880 | fix->fx_file = "<internal>"; | |
e0001a05 NC |
11881 | fix->fx_line = 0; |
11882 | ||
11883 | /* Write the length. */ | |
542f8b94 | 11884 | md_number_to_chars (&frag_data[4 + i * 12], |
e0001a05 | 11885 | cur_block->size, 4); |
542f8b94 | 11886 | md_number_to_chars (&frag_data[8 + i * 12], |
43cd72b9 | 11887 | frag_flags_to_number (&cur_block->flags), |
2f1bf5c1 | 11888 | sizeof (flagword)); |
e0001a05 NC |
11889 | cur_block = cur_block->next; |
11890 | } | |
542f8b94 BW |
11891 | frag_wane (frag_now); |
11892 | frag_new (0); | |
11893 | frag_wane (frag_now); | |
e0001a05 NC |
11894 | } |
11895 | } | |
11896 | } | |
11897 | } | |
11898 | ||
11899 | ||
532f93bd BW |
11900 | static bfd_boolean |
11901 | exclude_section_from_property_tables (segT sec) | |
11902 | { | |
11903 | flagword flags = bfd_get_section_flags (stdoutput, sec); | |
11904 | ||
11905 | /* Sections that don't contribute to the memory footprint are excluded. */ | |
11906 | if ((flags & SEC_DEBUGGING) | |
11907 | || !(flags & SEC_ALLOC) | |
11908 | || (flags & SEC_MERGE)) | |
11909 | return TRUE; | |
11910 | ||
11911 | /* Linker cie and fde optimizations mess up property entries for | |
11912 | eh_frame sections, but there is nothing inside them relevant to | |
11913 | property tables anyway. */ | |
11914 | if (strcmp (sec->name, ".eh_frame") == 0) | |
11915 | return TRUE; | |
11916 | ||
11917 | return FALSE; | |
11918 | } | |
11919 | ||
11920 | ||
7fa3d080 BW |
11921 | static bfd_boolean |
11922 | section_has_property (segT sec, frag_predicate property_function) | |
e0001a05 NC |
11923 | { |
11924 | segment_info_type *seginfo = seg_info (sec); | |
11925 | fragS *fragP; | |
11926 | ||
11927 | if (seginfo && seginfo->frchainP) | |
11928 | { | |
11929 | for (fragP = seginfo->frchainP->frch_root; fragP; fragP = fragP->fr_next) | |
11930 | { | |
11931 | if (property_function (fragP) | |
11932 | && (fragP->fr_type != rs_fill || fragP->fr_fix != 0)) | |
11933 | return TRUE; | |
11934 | } | |
11935 | } | |
11936 | return FALSE; | |
11937 | } | |
11938 | ||
11939 | ||
7fa3d080 BW |
11940 | static bfd_boolean |
11941 | section_has_xproperty (segT sec, frag_flags_fn property_function) | |
43cd72b9 BW |
11942 | { |
11943 | segment_info_type *seginfo = seg_info (sec); | |
11944 | fragS *fragP; | |
11945 | ||
11946 | if (seginfo && seginfo->frchainP) | |
11947 | { | |
11948 | for (fragP = seginfo->frchainP->frch_root; fragP; fragP = fragP->fr_next) | |
11949 | { | |
11950 | frag_flags prop_flags; | |
11951 | property_function (fragP, &prop_flags); | |
11952 | if (!xtensa_frag_flags_is_empty (&prop_flags)) | |
11953 | return TRUE; | |
11954 | } | |
11955 | } | |
11956 | return FALSE; | |
11957 | } | |
11958 | ||
11959 | ||
e0001a05 NC |
11960 | /* Two types of block sections exist right now: literal and insns. */ |
11961 | ||
7fa3d080 BW |
11962 | static void |
11963 | add_xt_block_frags (segT sec, | |
7fa3d080 BW |
11964 | xtensa_block_info **xt_block, |
11965 | frag_predicate property_function, | |
11966 | frag_predicate end_property_function) | |
e0001a05 | 11967 | { |
e0001a05 NC |
11968 | fragS *fragP; |
11969 | ||
e0001a05 NC |
11970 | /* Build it if needed. */ |
11971 | while (*xt_block != NULL) | |
11972 | xt_block = &(*xt_block)->next; | |
11973 | /* We are either at NULL at the beginning or at the end. */ | |
11974 | ||
11975 | /* Walk through the frags. */ | |
542f8b94 | 11976 | if (seg_info (sec)->frchainP) |
e0001a05 | 11977 | { |
542f8b94 | 11978 | for (fragP = seg_info (sec)->frchainP->frch_root; |
e0001a05 NC |
11979 | fragP; |
11980 | fragP = fragP->fr_next) | |
11981 | { | |
11982 | if (property_function (fragP) | |
11983 | && (fragP->fr_type != rs_fill || fragP->fr_fix != 0)) | |
11984 | { | |
11985 | if (*xt_block != NULL) | |
11986 | { | |
11987 | if ((*xt_block)->offset + (*xt_block)->size | |
11988 | == fragP->fr_address) | |
11989 | (*xt_block)->size += fragP->fr_fix; | |
11990 | else | |
11991 | xt_block = &((*xt_block)->next); | |
11992 | } | |
11993 | if (*xt_block == NULL) | |
11994 | { | |
325801bd | 11995 | xtensa_block_info *new_block = XNEW (xtensa_block_info); |
43cd72b9 BW |
11996 | new_block->sec = sec; |
11997 | new_block->offset = fragP->fr_address; | |
11998 | new_block->size = fragP->fr_fix; | |
11999 | new_block->next = NULL; | |
12000 | xtensa_frag_flags_init (&new_block->flags); | |
12001 | *xt_block = new_block; | |
12002 | } | |
12003 | if (end_property_function | |
12004 | && end_property_function (fragP)) | |
12005 | { | |
12006 | xt_block = &((*xt_block)->next); | |
12007 | } | |
12008 | } | |
12009 | } | |
12010 | } | |
12011 | } | |
12012 | ||
12013 | ||
12014 | /* Break the encapsulation of add_xt_prop_frags here. */ | |
12015 | ||
7fa3d080 BW |
12016 | static bfd_boolean |
12017 | xtensa_frag_flags_is_empty (const frag_flags *prop_flags) | |
43cd72b9 BW |
12018 | { |
12019 | if (prop_flags->is_literal | |
12020 | || prop_flags->is_insn | |
12021 | || prop_flags->is_data | |
12022 | || prop_flags->is_unreachable) | |
12023 | return FALSE; | |
12024 | return TRUE; | |
12025 | } | |
12026 | ||
12027 | ||
7fa3d080 BW |
12028 | static void |
12029 | xtensa_frag_flags_init (frag_flags *prop_flags) | |
43cd72b9 BW |
12030 | { |
12031 | memset (prop_flags, 0, sizeof (frag_flags)); | |
12032 | } | |
12033 | ||
12034 | ||
7fa3d080 BW |
12035 | static void |
12036 | get_frag_property_flags (const fragS *fragP, frag_flags *prop_flags) | |
43cd72b9 BW |
12037 | { |
12038 | xtensa_frag_flags_init (prop_flags); | |
12039 | if (fragP->tc_frag_data.is_literal) | |
12040 | prop_flags->is_literal = TRUE; | |
99ded152 BW |
12041 | if (fragP->tc_frag_data.is_specific_opcode |
12042 | || fragP->tc_frag_data.is_no_transform) | |
1f7efbae BW |
12043 | { |
12044 | prop_flags->is_no_transform = TRUE; | |
12045 | if (xtensa_frag_flags_is_empty (prop_flags)) | |
12046 | prop_flags->is_data = TRUE; | |
12047 | } | |
43cd72b9 | 12048 | if (fragP->tc_frag_data.is_unreachable) |
7fa3d080 | 12049 | prop_flags->is_unreachable = TRUE; |
43cd72b9 BW |
12050 | else if (fragP->tc_frag_data.is_insn) |
12051 | { | |
12052 | prop_flags->is_insn = TRUE; | |
12053 | if (fragP->tc_frag_data.is_loop_target) | |
12054 | prop_flags->insn.is_loop_target = TRUE; | |
12055 | if (fragP->tc_frag_data.is_branch_target) | |
12056 | prop_flags->insn.is_branch_target = TRUE; | |
43cd72b9 BW |
12057 | if (fragP->tc_frag_data.is_no_density) |
12058 | prop_flags->insn.is_no_density = TRUE; | |
12059 | if (fragP->tc_frag_data.use_absolute_literals) | |
12060 | prop_flags->insn.is_abslit = TRUE; | |
12061 | } | |
12062 | if (fragP->tc_frag_data.is_align) | |
12063 | { | |
12064 | prop_flags->is_align = TRUE; | |
12065 | prop_flags->alignment = fragP->tc_frag_data.alignment; | |
12066 | if (xtensa_frag_flags_is_empty (prop_flags)) | |
12067 | prop_flags->is_data = TRUE; | |
12068 | } | |
12069 | } | |
12070 | ||
12071 | ||
2f1bf5c1 | 12072 | static flagword |
7fa3d080 | 12073 | frag_flags_to_number (const frag_flags *prop_flags) |
43cd72b9 | 12074 | { |
2f1bf5c1 | 12075 | flagword num = 0; |
43cd72b9 BW |
12076 | if (prop_flags->is_literal) |
12077 | num |= XTENSA_PROP_LITERAL; | |
12078 | if (prop_flags->is_insn) | |
12079 | num |= XTENSA_PROP_INSN; | |
12080 | if (prop_flags->is_data) | |
12081 | num |= XTENSA_PROP_DATA; | |
12082 | if (prop_flags->is_unreachable) | |
12083 | num |= XTENSA_PROP_UNREACHABLE; | |
12084 | if (prop_flags->insn.is_loop_target) | |
12085 | num |= XTENSA_PROP_INSN_LOOP_TARGET; | |
12086 | if (prop_flags->insn.is_branch_target) | |
12087 | { | |
12088 | num |= XTENSA_PROP_INSN_BRANCH_TARGET; | |
12089 | num = SET_XTENSA_PROP_BT_ALIGN (num, prop_flags->insn.bt_align_priority); | |
12090 | } | |
12091 | ||
12092 | if (prop_flags->insn.is_no_density) | |
12093 | num |= XTENSA_PROP_INSN_NO_DENSITY; | |
99ded152 BW |
12094 | if (prop_flags->is_no_transform) |
12095 | num |= XTENSA_PROP_NO_TRANSFORM; | |
43cd72b9 BW |
12096 | if (prop_flags->insn.is_no_reorder) |
12097 | num |= XTENSA_PROP_INSN_NO_REORDER; | |
12098 | if (prop_flags->insn.is_abslit) | |
12099 | num |= XTENSA_PROP_INSN_ABSLIT; | |
12100 | ||
12101 | if (prop_flags->is_align) | |
12102 | { | |
12103 | num |= XTENSA_PROP_ALIGN; | |
12104 | num = SET_XTENSA_PROP_ALIGNMENT (num, prop_flags->alignment); | |
12105 | } | |
12106 | ||
12107 | return num; | |
12108 | } | |
12109 | ||
12110 | ||
12111 | static bfd_boolean | |
7fa3d080 BW |
12112 | xtensa_frag_flags_combinable (const frag_flags *prop_flags_1, |
12113 | const frag_flags *prop_flags_2) | |
43cd72b9 BW |
12114 | { |
12115 | /* Cannot combine with an end marker. */ | |
12116 | ||
12117 | if (prop_flags_1->is_literal != prop_flags_2->is_literal) | |
12118 | return FALSE; | |
12119 | if (prop_flags_1->is_insn != prop_flags_2->is_insn) | |
12120 | return FALSE; | |
12121 | if (prop_flags_1->is_data != prop_flags_2->is_data) | |
12122 | return FALSE; | |
12123 | ||
12124 | if (prop_flags_1->is_insn) | |
12125 | { | |
12126 | /* Properties of the beginning of the frag. */ | |
12127 | if (prop_flags_2->insn.is_loop_target) | |
12128 | return FALSE; | |
12129 | if (prop_flags_2->insn.is_branch_target) | |
12130 | return FALSE; | |
12131 | if (prop_flags_1->insn.is_no_density != | |
12132 | prop_flags_2->insn.is_no_density) | |
12133 | return FALSE; | |
99ded152 BW |
12134 | if (prop_flags_1->is_no_transform != |
12135 | prop_flags_2->is_no_transform) | |
43cd72b9 BW |
12136 | return FALSE; |
12137 | if (prop_flags_1->insn.is_no_reorder != | |
12138 | prop_flags_2->insn.is_no_reorder) | |
12139 | return FALSE; | |
12140 | if (prop_flags_1->insn.is_abslit != | |
12141 | prop_flags_2->insn.is_abslit) | |
12142 | return FALSE; | |
12143 | } | |
12144 | ||
12145 | if (prop_flags_1->is_align) | |
12146 | return FALSE; | |
12147 | ||
12148 | return TRUE; | |
12149 | } | |
12150 | ||
12151 | ||
7fa3d080 BW |
12152 | static bfd_vma |
12153 | xt_block_aligned_size (const xtensa_block_info *xt_block) | |
43cd72b9 BW |
12154 | { |
12155 | bfd_vma end_addr; | |
d77b99c9 | 12156 | unsigned align_bits; |
43cd72b9 BW |
12157 | |
12158 | if (!xt_block->flags.is_align) | |
12159 | return xt_block->size; | |
12160 | ||
12161 | end_addr = xt_block->offset + xt_block->size; | |
12162 | align_bits = xt_block->flags.alignment; | |
12163 | end_addr = ((end_addr + ((1 << align_bits) -1)) >> align_bits) << align_bits; | |
12164 | return end_addr - xt_block->offset; | |
12165 | } | |
12166 | ||
12167 | ||
12168 | static bfd_boolean | |
7fa3d080 BW |
12169 | xtensa_xt_block_combine (xtensa_block_info *xt_block, |
12170 | const xtensa_block_info *xt_block_2) | |
43cd72b9 BW |
12171 | { |
12172 | if (xt_block->sec != xt_block_2->sec) | |
12173 | return FALSE; | |
12174 | if (xt_block->offset + xt_block_aligned_size (xt_block) | |
12175 | != xt_block_2->offset) | |
12176 | return FALSE; | |
12177 | ||
12178 | if (xt_block_2->size == 0 | |
12179 | && (!xt_block_2->flags.is_unreachable | |
12180 | || xt_block->flags.is_unreachable)) | |
12181 | { | |
12182 | if (xt_block_2->flags.is_align | |
12183 | && xt_block->flags.is_align) | |
12184 | { | |
12185 | /* Nothing needed. */ | |
12186 | if (xt_block->flags.alignment >= xt_block_2->flags.alignment) | |
12187 | return TRUE; | |
12188 | } | |
12189 | else | |
12190 | { | |
12191 | if (xt_block_2->flags.is_align) | |
12192 | { | |
12193 | /* Push alignment to previous entry. */ | |
12194 | xt_block->flags.is_align = xt_block_2->flags.is_align; | |
12195 | xt_block->flags.alignment = xt_block_2->flags.alignment; | |
12196 | } | |
12197 | return TRUE; | |
12198 | } | |
12199 | } | |
12200 | if (!xtensa_frag_flags_combinable (&xt_block->flags, | |
12201 | &xt_block_2->flags)) | |
12202 | return FALSE; | |
12203 | ||
12204 | xt_block->size += xt_block_2->size; | |
12205 | ||
12206 | if (xt_block_2->flags.is_align) | |
12207 | { | |
12208 | xt_block->flags.is_align = TRUE; | |
12209 | xt_block->flags.alignment = xt_block_2->flags.alignment; | |
12210 | } | |
12211 | ||
12212 | return TRUE; | |
12213 | } | |
12214 | ||
12215 | ||
7fa3d080 BW |
12216 | static void |
12217 | add_xt_prop_frags (segT sec, | |
7fa3d080 BW |
12218 | xtensa_block_info **xt_block, |
12219 | frag_flags_fn property_function) | |
43cd72b9 | 12220 | { |
43cd72b9 BW |
12221 | fragS *fragP; |
12222 | ||
43cd72b9 BW |
12223 | /* Build it if needed. */ |
12224 | while (*xt_block != NULL) | |
12225 | { | |
12226 | xt_block = &(*xt_block)->next; | |
12227 | } | |
12228 | /* We are either at NULL at the beginning or at the end. */ | |
12229 | ||
12230 | /* Walk through the frags. */ | |
542f8b94 | 12231 | if (seg_info (sec)->frchainP) |
43cd72b9 | 12232 | { |
542f8b94 | 12233 | for (fragP = seg_info (sec)->frchainP->frch_root; fragP; |
43cd72b9 BW |
12234 | fragP = fragP->fr_next) |
12235 | { | |
12236 | xtensa_block_info tmp_block; | |
12237 | tmp_block.sec = sec; | |
12238 | tmp_block.offset = fragP->fr_address; | |
12239 | tmp_block.size = fragP->fr_fix; | |
12240 | tmp_block.next = NULL; | |
12241 | property_function (fragP, &tmp_block.flags); | |
12242 | ||
12243 | if (!xtensa_frag_flags_is_empty (&tmp_block.flags)) | |
12244 | /* && fragP->fr_fix != 0) */ | |
12245 | { | |
12246 | if ((*xt_block) == NULL | |
12247 | || !xtensa_xt_block_combine (*xt_block, &tmp_block)) | |
12248 | { | |
12249 | xtensa_block_info *new_block; | |
12250 | if ((*xt_block) != NULL) | |
12251 | xt_block = &(*xt_block)->next; | |
325801bd | 12252 | new_block = XNEW (xtensa_block_info); |
43cd72b9 BW |
12253 | *new_block = tmp_block; |
12254 | *xt_block = new_block; | |
12255 | } | |
12256 | } | |
12257 | } | |
12258 | } | |
12259 | } | |
12260 | ||
12261 | \f | |
12262 | /* op_placement_info_table */ | |
12263 | ||
12264 | /* op_placement_info makes it easier to determine which | |
12265 | ops can go in which slots. */ | |
12266 | ||
12267 | static void | |
7fa3d080 | 12268 | init_op_placement_info_table (void) |
43cd72b9 BW |
12269 | { |
12270 | xtensa_isa isa = xtensa_default_isa; | |
12271 | xtensa_insnbuf ibuf = xtensa_insnbuf_alloc (isa); | |
12272 | xtensa_opcode opcode; | |
12273 | xtensa_format fmt; | |
12274 | int slot; | |
12275 | int num_opcodes = xtensa_isa_num_opcodes (isa); | |
12276 | ||
325801bd | 12277 | op_placement_table = XNEWVEC (op_placement_info, num_opcodes); |
9c2799c2 | 12278 | gas_assert (xtensa_isa_num_formats (isa) < MAX_FORMATS); |
43cd72b9 BW |
12279 | |
12280 | for (opcode = 0; opcode < num_opcodes; opcode++) | |
12281 | { | |
12282 | op_placement_info *opi = &op_placement_table[opcode]; | |
12283 | /* FIXME: Make tinsn allocation dynamic. */ | |
51add5c3 | 12284 | if (xtensa_opcode_num_operands (isa, opcode) > MAX_INSN_ARGS) |
43cd72b9 | 12285 | as_fatal (_("too many operands in instruction")); |
43cd72b9 BW |
12286 | opi->narrowest = XTENSA_UNDEFINED; |
12287 | opi->narrowest_size = 0x7F; | |
b2d179be | 12288 | opi->narrowest_slot = 0; |
43cd72b9 BW |
12289 | opi->formats = 0; |
12290 | opi->num_formats = 0; | |
12291 | opi->issuef = 0; | |
12292 | for (fmt = 0; fmt < xtensa_isa_num_formats (isa); fmt++) | |
12293 | { | |
12294 | opi->slots[fmt] = 0; | |
12295 | for (slot = 0; slot < xtensa_format_num_slots (isa, fmt); slot++) | |
12296 | { | |
12297 | if (xtensa_opcode_encode (isa, fmt, slot, ibuf, opcode) == 0) | |
12298 | { | |
12299 | int fmt_length = xtensa_format_length (isa, fmt); | |
12300 | opi->issuef++; | |
12301 | set_bit (fmt, opi->formats); | |
12302 | set_bit (slot, opi->slots[fmt]); | |
a02728c8 BW |
12303 | if (fmt_length < opi->narrowest_size |
12304 | || (fmt_length == opi->narrowest_size | |
12305 | && (xtensa_format_num_slots (isa, fmt) | |
12306 | < xtensa_format_num_slots (isa, | |
12307 | opi->narrowest)))) | |
43cd72b9 BW |
12308 | { |
12309 | opi->narrowest = fmt; | |
12310 | opi->narrowest_size = fmt_length; | |
b2d179be | 12311 | opi->narrowest_slot = slot; |
43cd72b9 | 12312 | } |
e0001a05 NC |
12313 | } |
12314 | } | |
43cd72b9 BW |
12315 | if (opi->formats) |
12316 | opi->num_formats++; | |
e0001a05 NC |
12317 | } |
12318 | } | |
43cd72b9 BW |
12319 | xtensa_insnbuf_free (isa, ibuf); |
12320 | } | |
12321 | ||
12322 | ||
12323 | bfd_boolean | |
7fa3d080 | 12324 | opcode_fits_format_slot (xtensa_opcode opcode, xtensa_format fmt, int slot) |
43cd72b9 BW |
12325 | { |
12326 | return bit_is_set (slot, op_placement_table[opcode].slots[fmt]); | |
12327 | } | |
12328 | ||
12329 | ||
12330 | /* If the opcode is available in a single slot format, return its size. */ | |
12331 | ||
7fa3d080 BW |
12332 | static int |
12333 | xg_get_single_size (xtensa_opcode opcode) | |
43cd72b9 | 12334 | { |
b2d179be | 12335 | return op_placement_table[opcode].narrowest_size; |
43cd72b9 BW |
12336 | } |
12337 | ||
12338 | ||
7fa3d080 BW |
12339 | static xtensa_format |
12340 | xg_get_single_format (xtensa_opcode opcode) | |
43cd72b9 | 12341 | { |
b2d179be BW |
12342 | return op_placement_table[opcode].narrowest; |
12343 | } | |
12344 | ||
12345 | ||
12346 | static int | |
12347 | xg_get_single_slot (xtensa_opcode opcode) | |
12348 | { | |
12349 | return op_placement_table[opcode].narrowest_slot; | |
e0001a05 NC |
12350 | } |
12351 | ||
12352 | \f | |
12353 | /* Instruction Stack Functions (from "xtensa-istack.h"). */ | |
12354 | ||
12355 | void | |
7fa3d080 | 12356 | istack_init (IStack *stack) |
e0001a05 | 12357 | { |
e0001a05 NC |
12358 | stack->ninsn = 0; |
12359 | } | |
12360 | ||
12361 | ||
12362 | bfd_boolean | |
7fa3d080 | 12363 | istack_empty (IStack *stack) |
e0001a05 NC |
12364 | { |
12365 | return (stack->ninsn == 0); | |
12366 | } | |
12367 | ||
12368 | ||
12369 | bfd_boolean | |
7fa3d080 | 12370 | istack_full (IStack *stack) |
e0001a05 NC |
12371 | { |
12372 | return (stack->ninsn == MAX_ISTACK); | |
12373 | } | |
12374 | ||
12375 | ||
12376 | /* Return a pointer to the top IStack entry. | |
43cd72b9 | 12377 | It is an error to call this if istack_empty () is TRUE. */ |
e0001a05 NC |
12378 | |
12379 | TInsn * | |
7fa3d080 | 12380 | istack_top (IStack *stack) |
e0001a05 NC |
12381 | { |
12382 | int rec = stack->ninsn - 1; | |
9c2799c2 | 12383 | gas_assert (!istack_empty (stack)); |
e0001a05 NC |
12384 | return &stack->insn[rec]; |
12385 | } | |
12386 | ||
12387 | ||
12388 | /* Add a new TInsn to an IStack. | |
43cd72b9 | 12389 | It is an error to call this if istack_full () is TRUE. */ |
e0001a05 NC |
12390 | |
12391 | void | |
7fa3d080 | 12392 | istack_push (IStack *stack, TInsn *insn) |
e0001a05 NC |
12393 | { |
12394 | int rec = stack->ninsn; | |
9c2799c2 | 12395 | gas_assert (!istack_full (stack)); |
43cd72b9 | 12396 | stack->insn[rec] = *insn; |
e0001a05 NC |
12397 | stack->ninsn++; |
12398 | } | |
12399 | ||
12400 | ||
12401 | /* Clear space for the next TInsn on the IStack and return a pointer | |
43cd72b9 | 12402 | to it. It is an error to call this if istack_full () is TRUE. */ |
e0001a05 NC |
12403 | |
12404 | TInsn * | |
7fa3d080 | 12405 | istack_push_space (IStack *stack) |
e0001a05 NC |
12406 | { |
12407 | int rec = stack->ninsn; | |
12408 | TInsn *insn; | |
9c2799c2 | 12409 | gas_assert (!istack_full (stack)); |
e0001a05 | 12410 | insn = &stack->insn[rec]; |
60242db2 | 12411 | tinsn_init (insn); |
e0001a05 NC |
12412 | stack->ninsn++; |
12413 | return insn; | |
12414 | } | |
12415 | ||
12416 | ||
12417 | /* Remove the last pushed instruction. It is an error to call this if | |
43cd72b9 | 12418 | istack_empty () returns TRUE. */ |
e0001a05 NC |
12419 | |
12420 | void | |
7fa3d080 | 12421 | istack_pop (IStack *stack) |
e0001a05 NC |
12422 | { |
12423 | int rec = stack->ninsn - 1; | |
9c2799c2 | 12424 | gas_assert (!istack_empty (stack)); |
e0001a05 | 12425 | stack->ninsn--; |
60242db2 | 12426 | tinsn_init (&stack->insn[rec]); |
e0001a05 NC |
12427 | } |
12428 | ||
12429 | \f | |
12430 | /* TInsn functions. */ | |
12431 | ||
12432 | void | |
7fa3d080 | 12433 | tinsn_init (TInsn *dst) |
e0001a05 NC |
12434 | { |
12435 | memset (dst, 0, sizeof (TInsn)); | |
12436 | } | |
12437 | ||
12438 | ||
43cd72b9 | 12439 | /* Return TRUE if ANY of the operands in the insn are symbolic. */ |
e0001a05 NC |
12440 | |
12441 | static bfd_boolean | |
7fa3d080 | 12442 | tinsn_has_symbolic_operands (const TInsn *insn) |
e0001a05 NC |
12443 | { |
12444 | int i; | |
12445 | int n = insn->ntok; | |
12446 | ||
9c2799c2 | 12447 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
12448 | |
12449 | for (i = 0; i < n; ++i) | |
12450 | { | |
12451 | switch (insn->tok[i].X_op) | |
12452 | { | |
12453 | case O_register: | |
12454 | case O_constant: | |
12455 | break; | |
12456 | default: | |
12457 | return TRUE; | |
12458 | } | |
12459 | } | |
12460 | return FALSE; | |
12461 | } | |
12462 | ||
12463 | ||
12464 | bfd_boolean | |
7fa3d080 | 12465 | tinsn_has_invalid_symbolic_operands (const TInsn *insn) |
e0001a05 | 12466 | { |
43cd72b9 | 12467 | xtensa_isa isa = xtensa_default_isa; |
e0001a05 NC |
12468 | int i; |
12469 | int n = insn->ntok; | |
12470 | ||
9c2799c2 | 12471 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
12472 | |
12473 | for (i = 0; i < n; ++i) | |
12474 | { | |
12475 | switch (insn->tok[i].X_op) | |
12476 | { | |
12477 | case O_register: | |
12478 | case O_constant: | |
12479 | break; | |
43cd72b9 BW |
12480 | case O_big: |
12481 | case O_illegal: | |
12482 | case O_absent: | |
12483 | /* Errors for these types are caught later. */ | |
12484 | break; | |
12485 | case O_hi16: | |
12486 | case O_lo16: | |
e0001a05 | 12487 | default: |
43cd72b9 BW |
12488 | /* Symbolic immediates are only allowed on the last immediate |
12489 | operand. At this time, CONST16 is the only opcode where we | |
e7da6241 | 12490 | support non-PC-relative relocations. */ |
43cd72b9 BW |
12491 | if (i != get_relaxable_immed (insn->opcode) |
12492 | || (xtensa_operand_is_PCrelative (isa, insn->opcode, i) != 1 | |
12493 | && insn->opcode != xtensa_const16_opcode)) | |
12494 | { | |
431ad2d0 | 12495 | as_bad (_("invalid symbolic operand")); |
43cd72b9 BW |
12496 | return TRUE; |
12497 | } | |
e0001a05 NC |
12498 | } |
12499 | } | |
12500 | return FALSE; | |
12501 | } | |
12502 | ||
12503 | ||
12504 | /* For assembly code with complex expressions (e.g. subtraction), | |
12505 | we have to build them in the literal pool so that | |
12506 | their results are calculated correctly after relaxation. | |
12507 | The relaxation only handles expressions that | |
12508 | boil down to SYMBOL + OFFSET. */ | |
12509 | ||
12510 | static bfd_boolean | |
7fa3d080 | 12511 | tinsn_has_complex_operands (const TInsn *insn) |
e0001a05 NC |
12512 | { |
12513 | int i; | |
12514 | int n = insn->ntok; | |
9c2799c2 | 12515 | gas_assert (insn->insn_type == ITYPE_INSN); |
e0001a05 NC |
12516 | for (i = 0; i < n; ++i) |
12517 | { | |
12518 | switch (insn->tok[i].X_op) | |
12519 | { | |
12520 | case O_register: | |
12521 | case O_constant: | |
12522 | case O_symbol: | |
43cd72b9 BW |
12523 | case O_lo16: |
12524 | case O_hi16: | |
e0001a05 NC |
12525 | break; |
12526 | default: | |
12527 | return TRUE; | |
12528 | } | |
12529 | } | |
12530 | return FALSE; | |
12531 | } | |
12532 | ||
12533 | ||
b2d179be BW |
12534 | /* Encode a TInsn opcode and its constant operands into slotbuf. |
12535 | Return TRUE if there is a symbol in the immediate field. This | |
12536 | function assumes that: | |
12537 | 1) The number of operands are correct. | |
12538 | 2) The insn_type is ITYPE_INSN. | |
12539 | 3) The opcode can be encoded in the specified format and slot. | |
12540 | 4) Operands are either O_constant or O_symbol, and all constants fit. */ | |
43cd72b9 BW |
12541 | |
12542 | static bfd_boolean | |
7fa3d080 BW |
12543 | tinsn_to_slotbuf (xtensa_format fmt, |
12544 | int slot, | |
12545 | TInsn *tinsn, | |
12546 | xtensa_insnbuf slotbuf) | |
43cd72b9 BW |
12547 | { |
12548 | xtensa_isa isa = xtensa_default_isa; | |
12549 | xtensa_opcode opcode = tinsn->opcode; | |
12550 | bfd_boolean has_fixup = FALSE; | |
12551 | int noperands = xtensa_opcode_num_operands (isa, opcode); | |
12552 | int i; | |
12553 | ||
9c2799c2 | 12554 | gas_assert (tinsn->insn_type == ITYPE_INSN); |
43cd72b9 BW |
12555 | if (noperands != tinsn->ntok) |
12556 | as_fatal (_("operand number mismatch")); | |
12557 | ||
12558 | if (xtensa_opcode_encode (isa, fmt, slot, slotbuf, opcode)) | |
12559 | { | |
12560 | as_bad (_("cannot encode opcode \"%s\" in the given format \"%s\""), | |
12561 | xtensa_opcode_name (isa, opcode), xtensa_format_name (isa, fmt)); | |
12562 | return FALSE; | |
12563 | } | |
12564 | ||
12565 | for (i = 0; i < noperands; i++) | |
12566 | { | |
91d6fa6a | 12567 | expressionS *exp = &tinsn->tok[i]; |
d77b99c9 BW |
12568 | int rc; |
12569 | unsigned line; | |
3b4dbbbf | 12570 | const char *file_name; |
43cd72b9 BW |
12571 | uint32 opnd_value; |
12572 | ||
91d6fa6a | 12573 | switch (exp->X_op) |
43cd72b9 BW |
12574 | { |
12575 | case O_register: | |
12576 | if (xtensa_operand_is_visible (isa, opcode, i) == 0) | |
12577 | break; | |
12578 | /* The register number has already been checked in | |
12579 | expression_maybe_register, so we don't need to check here. */ | |
91d6fa6a | 12580 | opnd_value = exp->X_add_number; |
43cd72b9 BW |
12581 | (void) xtensa_operand_encode (isa, opcode, i, &opnd_value); |
12582 | rc = xtensa_operand_set_field (isa, opcode, i, fmt, slot, slotbuf, | |
12583 | opnd_value); | |
12584 | if (rc != 0) | |
12585 | as_warn (_("xtensa-isa failure: %s"), xtensa_isa_error_msg (isa)); | |
12586 | break; | |
12587 | ||
12588 | case O_constant: | |
12589 | if (xtensa_operand_is_visible (isa, opcode, i) == 0) | |
12590 | break; | |
3b4dbbbf | 12591 | file_name = as_where (&line); |
43cd72b9 BW |
12592 | /* It is a constant and we called this function |
12593 | then we have to try to fit it. */ | |
12594 | xtensa_insnbuf_set_operand (slotbuf, fmt, slot, opcode, i, | |
91d6fa6a | 12595 | exp->X_add_number, file_name, line); |
e0001a05 NC |
12596 | break; |
12597 | ||
e0001a05 NC |
12598 | default: |
12599 | has_fixup = TRUE; | |
12600 | break; | |
12601 | } | |
12602 | } | |
43cd72b9 | 12603 | |
e0001a05 NC |
12604 | return has_fixup; |
12605 | } | |
12606 | ||
12607 | ||
b2d179be BW |
12608 | /* Encode a single TInsn into an insnbuf. If the opcode can only be encoded |
12609 | into a multi-slot instruction, fill the other slots with NOPs. | |
12610 | Return TRUE if there is a symbol in the immediate field. See also the | |
12611 | assumptions listed for tinsn_to_slotbuf. */ | |
12612 | ||
12613 | static bfd_boolean | |
12614 | tinsn_to_insnbuf (TInsn *tinsn, xtensa_insnbuf insnbuf) | |
12615 | { | |
12616 | static xtensa_insnbuf slotbuf = 0; | |
12617 | static vliw_insn vinsn; | |
12618 | xtensa_isa isa = xtensa_default_isa; | |
12619 | bfd_boolean has_fixup = FALSE; | |
12620 | int i; | |
12621 | ||
12622 | if (!slotbuf) | |
12623 | { | |
12624 | slotbuf = xtensa_insnbuf_alloc (isa); | |
12625 | xg_init_vinsn (&vinsn); | |
12626 | } | |
12627 | ||
12628 | xg_clear_vinsn (&vinsn); | |
12629 | ||
12630 | bundle_tinsn (tinsn, &vinsn); | |
12631 | ||
12632 | xtensa_format_encode (isa, vinsn.format, insnbuf); | |
12633 | ||
12634 | for (i = 0; i < vinsn.num_slots; i++) | |
12635 | { | |
12636 | /* Only one slot may have a fix-up because the rest contains NOPs. */ | |
12637 | has_fixup |= | |
12638 | tinsn_to_slotbuf (vinsn.format, i, &vinsn.slots[i], vinsn.slotbuf[i]); | |
12639 | xtensa_format_set_slot (isa, vinsn.format, i, insnbuf, vinsn.slotbuf[i]); | |
12640 | } | |
12641 | ||
12642 | return has_fixup; | |
12643 | } | |
12644 | ||
12645 | ||
43cd72b9 | 12646 | /* Check the instruction arguments. Return TRUE on failure. */ |
e0001a05 | 12647 | |
7fa3d080 BW |
12648 | static bfd_boolean |
12649 | tinsn_check_arguments (const TInsn *insn) | |
e0001a05 NC |
12650 | { |
12651 | xtensa_isa isa = xtensa_default_isa; | |
12652 | xtensa_opcode opcode = insn->opcode; | |
6dc6b655 BW |
12653 | xtensa_regfile t1_regfile, t2_regfile; |
12654 | int t1_reg, t2_reg; | |
12655 | int t1_base_reg, t1_last_reg; | |
12656 | int t2_base_reg, t2_last_reg; | |
12657 | char t1_inout, t2_inout; | |
12658 | int i, j; | |
e0001a05 NC |
12659 | |
12660 | if (opcode == XTENSA_UNDEFINED) | |
12661 | { | |
12662 | as_bad (_("invalid opcode")); | |
12663 | return TRUE; | |
12664 | } | |
12665 | ||
43cd72b9 | 12666 | if (xtensa_opcode_num_operands (isa, opcode) > insn->ntok) |
e0001a05 NC |
12667 | { |
12668 | as_bad (_("too few operands")); | |
12669 | return TRUE; | |
12670 | } | |
12671 | ||
43cd72b9 | 12672 | if (xtensa_opcode_num_operands (isa, opcode) < insn->ntok) |
e0001a05 NC |
12673 | { |
12674 | as_bad (_("too many operands")); | |
12675 | return TRUE; | |
12676 | } | |
6dc6b655 BW |
12677 | |
12678 | /* Check registers. */ | |
12679 | for (j = 0; j < insn->ntok; j++) | |
12680 | { | |
12681 | if (xtensa_operand_is_register (isa, insn->opcode, j) != 1) | |
12682 | continue; | |
12683 | ||
12684 | t2_regfile = xtensa_operand_regfile (isa, insn->opcode, j); | |
12685 | t2_base_reg = insn->tok[j].X_add_number; | |
12686 | t2_last_reg | |
12687 | = t2_base_reg + xtensa_operand_num_regs (isa, insn->opcode, j); | |
12688 | ||
12689 | for (i = 0; i < insn->ntok; i++) | |
12690 | { | |
12691 | if (i == j) | |
12692 | continue; | |
12693 | ||
12694 | if (xtensa_operand_is_register (isa, insn->opcode, i) != 1) | |
12695 | continue; | |
12696 | ||
12697 | t1_regfile = xtensa_operand_regfile (isa, insn->opcode, i); | |
12698 | ||
12699 | if (t1_regfile != t2_regfile) | |
12700 | continue; | |
12701 | ||
12702 | t1_inout = xtensa_operand_inout (isa, insn->opcode, i); | |
12703 | t2_inout = xtensa_operand_inout (isa, insn->opcode, j); | |
12704 | ||
12705 | t1_base_reg = insn->tok[i].X_add_number; | |
12706 | t1_last_reg = (t1_base_reg | |
12707 | + xtensa_operand_num_regs (isa, insn->opcode, i)); | |
12708 | ||
12709 | for (t1_reg = t1_base_reg; t1_reg < t1_last_reg; t1_reg++) | |
12710 | { | |
12711 | for (t2_reg = t2_base_reg; t2_reg < t2_last_reg; t2_reg++) | |
12712 | { | |
12713 | if (t1_reg != t2_reg) | |
12714 | continue; | |
12715 | ||
12716 | if (t1_inout != 'i' && t2_inout != 'i') | |
12717 | { | |
12718 | as_bad (_("multiple writes to the same register")); | |
12719 | return TRUE; | |
12720 | } | |
12721 | } | |
12722 | } | |
12723 | } | |
12724 | } | |
e0001a05 NC |
12725 | return FALSE; |
12726 | } | |
12727 | ||
12728 | ||
12729 | /* Load an instruction from its encoded form. */ | |
12730 | ||
12731 | static void | |
7fa3d080 | 12732 | tinsn_from_chars (TInsn *tinsn, char *f, int slot) |
e0001a05 | 12733 | { |
43cd72b9 | 12734 | vliw_insn vinsn; |
e0001a05 | 12735 | |
43cd72b9 BW |
12736 | xg_init_vinsn (&vinsn); |
12737 | vinsn_from_chars (&vinsn, f); | |
12738 | ||
12739 | *tinsn = vinsn.slots[slot]; | |
12740 | xg_free_vinsn (&vinsn); | |
12741 | } | |
e0001a05 | 12742 | |
43cd72b9 BW |
12743 | |
12744 | static void | |
7fa3d080 BW |
12745 | tinsn_from_insnbuf (TInsn *tinsn, |
12746 | xtensa_insnbuf slotbuf, | |
12747 | xtensa_format fmt, | |
12748 | int slot) | |
43cd72b9 BW |
12749 | { |
12750 | int i; | |
12751 | xtensa_isa isa = xtensa_default_isa; | |
e0001a05 NC |
12752 | |
12753 | /* Find the immed. */ | |
43cd72b9 BW |
12754 | tinsn_init (tinsn); |
12755 | tinsn->insn_type = ITYPE_INSN; | |
12756 | tinsn->is_specific_opcode = FALSE; /* must not be specific */ | |
12757 | tinsn->opcode = xtensa_opcode_decode (isa, fmt, slot, slotbuf); | |
12758 | tinsn->ntok = xtensa_opcode_num_operands (isa, tinsn->opcode); | |
12759 | for (i = 0; i < tinsn->ntok; i++) | |
e0001a05 | 12760 | { |
43cd72b9 BW |
12761 | set_expr_const (&tinsn->tok[i], |
12762 | xtensa_insnbuf_get_operand (slotbuf, fmt, slot, | |
12763 | tinsn->opcode, i)); | |
e0001a05 NC |
12764 | } |
12765 | } | |
12766 | ||
12767 | ||
12768 | /* Read the value of the relaxable immed from the fr_symbol and fr_offset. */ | |
12769 | ||
12770 | static void | |
7fa3d080 | 12771 | tinsn_immed_from_frag (TInsn *tinsn, fragS *fragP, int slot) |
e0001a05 | 12772 | { |
43cd72b9 | 12773 | xtensa_opcode opcode = tinsn->opcode; |
e0001a05 NC |
12774 | int opnum; |
12775 | ||
43cd72b9 | 12776 | if (fragP->tc_frag_data.slot_symbols[slot]) |
e0001a05 NC |
12777 | { |
12778 | opnum = get_relaxable_immed (opcode); | |
9c2799c2 | 12779 | gas_assert (opnum >= 0); |
e7da6241 BW |
12780 | set_expr_symbol_offset (&tinsn->tok[opnum], |
12781 | fragP->tc_frag_data.slot_symbols[slot], | |
12782 | fragP->tc_frag_data.slot_offsets[slot]); | |
e0001a05 | 12783 | } |
19e8f41a | 12784 | tinsn->extra_arg = fragP->tc_frag_data.free_reg[slot]; |
e0001a05 NC |
12785 | } |
12786 | ||
12787 | ||
12788 | static int | |
7fa3d080 | 12789 | get_num_stack_text_bytes (IStack *istack) |
e0001a05 NC |
12790 | { |
12791 | int i; | |
12792 | int text_bytes = 0; | |
12793 | ||
12794 | for (i = 0; i < istack->ninsn; i++) | |
12795 | { | |
43cd72b9 BW |
12796 | TInsn *tinsn = &istack->insn[i]; |
12797 | if (tinsn->insn_type == ITYPE_INSN) | |
12798 | text_bytes += xg_get_single_size (tinsn->opcode); | |
e0001a05 NC |
12799 | } |
12800 | return text_bytes; | |
12801 | } | |
12802 | ||
12803 | ||
12804 | static int | |
7fa3d080 | 12805 | get_num_stack_literal_bytes (IStack *istack) |
e0001a05 NC |
12806 | { |
12807 | int i; | |
12808 | int lit_bytes = 0; | |
12809 | ||
12810 | for (i = 0; i < istack->ninsn; i++) | |
12811 | { | |
43cd72b9 BW |
12812 | TInsn *tinsn = &istack->insn[i]; |
12813 | if (tinsn->insn_type == ITYPE_LITERAL && tinsn->ntok == 1) | |
e0001a05 NC |
12814 | lit_bytes += 4; |
12815 | } | |
12816 | return lit_bytes; | |
12817 | } | |
12818 | ||
43cd72b9 BW |
12819 | \f |
12820 | /* vliw_insn functions. */ | |
12821 | ||
7fa3d080 BW |
12822 | static void |
12823 | xg_init_vinsn (vliw_insn *v) | |
43cd72b9 BW |
12824 | { |
12825 | int i; | |
12826 | xtensa_isa isa = xtensa_default_isa; | |
12827 | ||
12828 | xg_clear_vinsn (v); | |
12829 | ||
12830 | v->insnbuf = xtensa_insnbuf_alloc (isa); | |
12831 | if (v->insnbuf == NULL) | |
12832 | as_fatal (_("out of memory")); | |
12833 | ||
62af60e2 | 12834 | for (i = 0; i < config_max_slots; i++) |
43cd72b9 | 12835 | { |
43cd72b9 BW |
12836 | v->slotbuf[i] = xtensa_insnbuf_alloc (isa); |
12837 | if (v->slotbuf[i] == NULL) | |
12838 | as_fatal (_("out of memory")); | |
12839 | } | |
12840 | } | |
12841 | ||
12842 | ||
7fa3d080 BW |
12843 | static void |
12844 | xg_clear_vinsn (vliw_insn *v) | |
43cd72b9 BW |
12845 | { |
12846 | int i; | |
65738a7d | 12847 | |
3739860c | 12848 | memset (v, 0, offsetof (vliw_insn, slots) |
62af60e2 | 12849 | + sizeof(TInsn) * config_max_slots); |
65738a7d | 12850 | |
43cd72b9 BW |
12851 | v->format = XTENSA_UNDEFINED; |
12852 | v->num_slots = 0; | |
12853 | v->inside_bundle = FALSE; | |
12854 | ||
12855 | if (xt_saved_debug_type != DEBUG_NONE) | |
12856 | debug_type = xt_saved_debug_type; | |
12857 | ||
62af60e2 | 12858 | for (i = 0; i < config_max_slots; i++) |
65738a7d | 12859 | v->slots[i].opcode = XTENSA_UNDEFINED; |
43cd72b9 BW |
12860 | } |
12861 | ||
12862 | ||
d8392fd9 SA |
12863 | static void |
12864 | xg_copy_vinsn (vliw_insn *dst, vliw_insn *src) | |
12865 | { | |
3739860c | 12866 | memcpy (dst, src, |
d8392fd9 SA |
12867 | offsetof(vliw_insn, slots) + src->num_slots * sizeof(TInsn)); |
12868 | dst->insnbuf = src->insnbuf; | |
12869 | memcpy (dst->slotbuf, src->slotbuf, src->num_slots * sizeof(xtensa_insnbuf)); | |
12870 | } | |
12871 | ||
12872 | ||
7fa3d080 BW |
12873 | static bfd_boolean |
12874 | vinsn_has_specific_opcodes (vliw_insn *v) | |
43cd72b9 BW |
12875 | { |
12876 | int i; | |
c138bc38 | 12877 | |
43cd72b9 BW |
12878 | for (i = 0; i < v->num_slots; i++) |
12879 | { | |
12880 | if (v->slots[i].is_specific_opcode) | |
12881 | return TRUE; | |
12882 | } | |
12883 | return FALSE; | |
12884 | } | |
12885 | ||
12886 | ||
7fa3d080 BW |
12887 | static void |
12888 | xg_free_vinsn (vliw_insn *v) | |
43cd72b9 BW |
12889 | { |
12890 | int i; | |
12891 | xtensa_insnbuf_free (xtensa_default_isa, v->insnbuf); | |
62af60e2 | 12892 | for (i = 0; i < config_max_slots; i++) |
43cd72b9 BW |
12893 | xtensa_insnbuf_free (xtensa_default_isa, v->slotbuf[i]); |
12894 | } | |
12895 | ||
12896 | ||
e7da6241 BW |
12897 | /* Encode a vliw_insn into an insnbuf. Return TRUE if there are any symbolic |
12898 | operands. See also the assumptions listed for tinsn_to_slotbuf. */ | |
43cd72b9 BW |
12899 | |
12900 | static bfd_boolean | |
7fa3d080 BW |
12901 | vinsn_to_insnbuf (vliw_insn *vinsn, |
12902 | char *frag_offset, | |
12903 | fragS *fragP, | |
12904 | bfd_boolean record_fixup) | |
43cd72b9 BW |
12905 | { |
12906 | xtensa_isa isa = xtensa_default_isa; | |
12907 | xtensa_format fmt = vinsn->format; | |
12908 | xtensa_insnbuf insnbuf = vinsn->insnbuf; | |
12909 | int slot; | |
12910 | bfd_boolean has_fixup = FALSE; | |
12911 | ||
12912 | xtensa_format_encode (isa, fmt, insnbuf); | |
12913 | ||
12914 | for (slot = 0; slot < vinsn->num_slots; slot++) | |
12915 | { | |
12916 | TInsn *tinsn = &vinsn->slots[slot]; | |
19e8f41a | 12917 | expressionS *extra_arg = &tinsn->extra_arg; |
43cd72b9 BW |
12918 | bfd_boolean tinsn_has_fixup = |
12919 | tinsn_to_slotbuf (vinsn->format, slot, tinsn, | |
12920 | vinsn->slotbuf[slot]); | |
12921 | ||
12922 | xtensa_format_set_slot (isa, fmt, slot, | |
12923 | insnbuf, vinsn->slotbuf[slot]); | |
19e8f41a | 12924 | if (extra_arg->X_op != O_illegal && extra_arg->X_op != O_register) |
28dbbc02 BW |
12925 | { |
12926 | if (vinsn->num_slots != 1) | |
12927 | as_bad (_("TLS relocation not allowed in FLIX bundle")); | |
12928 | else if (record_fixup) | |
12929 | /* Instructions that generate TLS relocations should always be | |
12930 | relaxed in the front-end. If "record_fixup" is set, then this | |
12931 | function is being called during back-end relaxation, so flag | |
12932 | the unexpected behavior as an error. */ | |
12933 | as_bad (_("unexpected TLS relocation")); | |
12934 | else | |
12935 | fix_new (fragP, frag_offset - fragP->fr_literal, | |
12936 | xtensa_format_length (isa, fmt), | |
19e8f41a BW |
12937 | extra_arg->X_add_symbol, extra_arg->X_add_number, |
12938 | FALSE, map_operator_to_reloc (extra_arg->X_op, FALSE)); | |
28dbbc02 | 12939 | } |
e7da6241 | 12940 | if (tinsn_has_fixup) |
43cd72b9 BW |
12941 | { |
12942 | int i; | |
12943 | xtensa_opcode opcode = tinsn->opcode; | |
12944 | int noperands = xtensa_opcode_num_operands (isa, opcode); | |
12945 | has_fixup = TRUE; | |
12946 | ||
12947 | for (i = 0; i < noperands; i++) | |
12948 | { | |
91d6fa6a NC |
12949 | expressionS* exp = &tinsn->tok[i]; |
12950 | switch (exp->X_op) | |
43cd72b9 BW |
12951 | { |
12952 | case O_symbol: | |
12953 | case O_lo16: | |
12954 | case O_hi16: | |
12955 | if (get_relaxable_immed (opcode) == i) | |
12956 | { | |
e7da6241 BW |
12957 | /* Add a fix record for the instruction, except if this |
12958 | function is being called prior to relaxation, i.e., | |
12959 | if record_fixup is false, and the instruction might | |
12960 | be relaxed later. */ | |
12961 | if (record_fixup | |
12962 | || tinsn->is_specific_opcode | |
12963 | || !xg_is_relaxable_insn (tinsn, 0)) | |
43cd72b9 | 12964 | { |
91d6fa6a | 12965 | xg_add_opcode_fix (tinsn, i, fmt, slot, exp, fragP, |
e7da6241 | 12966 | frag_offset - fragP->fr_literal); |
43cd72b9 BW |
12967 | } |
12968 | else | |
12969 | { | |
91d6fa6a | 12970 | if (exp->X_op != O_symbol) |
e7da6241 | 12971 | as_bad (_("invalid operand")); |
91d6fa6a NC |
12972 | tinsn->symbol = exp->X_add_symbol; |
12973 | tinsn->offset = exp->X_add_number; | |
43cd72b9 BW |
12974 | } |
12975 | } | |
12976 | else | |
e7da6241 | 12977 | as_bad (_("symbolic operand not allowed")); |
43cd72b9 BW |
12978 | break; |
12979 | ||
12980 | case O_constant: | |
12981 | case O_register: | |
12982 | break; | |
12983 | ||
43cd72b9 | 12984 | default: |
e7da6241 | 12985 | as_bad (_("expression too complex")); |
43cd72b9 BW |
12986 | break; |
12987 | } | |
12988 | } | |
12989 | } | |
12990 | } | |
12991 | ||
12992 | return has_fixup; | |
12993 | } | |
12994 | ||
12995 | ||
12996 | static void | |
7fa3d080 | 12997 | vinsn_from_chars (vliw_insn *vinsn, char *f) |
43cd72b9 BW |
12998 | { |
12999 | static xtensa_insnbuf insnbuf = NULL; | |
13000 | static xtensa_insnbuf slotbuf = NULL; | |
13001 | int i; | |
13002 | xtensa_format fmt; | |
13003 | xtensa_isa isa = xtensa_default_isa; | |
13004 | ||
13005 | if (!insnbuf) | |
13006 | { | |
13007 | insnbuf = xtensa_insnbuf_alloc (isa); | |
13008 | slotbuf = xtensa_insnbuf_alloc (isa); | |
13009 | } | |
13010 | ||
d77b99c9 | 13011 | xtensa_insnbuf_from_chars (isa, insnbuf, (unsigned char *) f, 0); |
43cd72b9 BW |
13012 | fmt = xtensa_format_decode (isa, insnbuf); |
13013 | if (fmt == XTENSA_UNDEFINED) | |
13014 | as_fatal (_("cannot decode instruction format")); | |
13015 | vinsn->format = fmt; | |
13016 | vinsn->num_slots = xtensa_format_num_slots (isa, fmt); | |
13017 | ||
13018 | for (i = 0; i < vinsn->num_slots; i++) | |
13019 | { | |
13020 | TInsn *tinsn = &vinsn->slots[i]; | |
13021 | xtensa_format_get_slot (isa, fmt, i, insnbuf, slotbuf); | |
13022 | tinsn_from_insnbuf (tinsn, slotbuf, fmt, i); | |
13023 | } | |
13024 | } | |
13025 | ||
e0001a05 NC |
13026 | \f |
13027 | /* Expression utilities. */ | |
13028 | ||
43cd72b9 | 13029 | /* Return TRUE if the expression is an integer constant. */ |
e0001a05 NC |
13030 | |
13031 | bfd_boolean | |
7fa3d080 | 13032 | expr_is_const (const expressionS *s) |
e0001a05 NC |
13033 | { |
13034 | return (s->X_op == O_constant); | |
13035 | } | |
13036 | ||
13037 | ||
13038 | /* Get the expression constant. | |
43cd72b9 | 13039 | Calling this is illegal if expr_is_const () returns TRUE. */ |
e0001a05 NC |
13040 | |
13041 | offsetT | |
7fa3d080 | 13042 | get_expr_const (const expressionS *s) |
e0001a05 | 13043 | { |
9c2799c2 | 13044 | gas_assert (expr_is_const (s)); |
e0001a05 NC |
13045 | return s->X_add_number; |
13046 | } | |
13047 | ||
13048 | ||
13049 | /* Set the expression to a constant value. */ | |
13050 | ||
13051 | void | |
7fa3d080 | 13052 | set_expr_const (expressionS *s, offsetT val) |
e0001a05 NC |
13053 | { |
13054 | s->X_op = O_constant; | |
13055 | s->X_add_number = val; | |
13056 | s->X_add_symbol = NULL; | |
13057 | s->X_op_symbol = NULL; | |
13058 | } | |
13059 | ||
13060 | ||
43cd72b9 | 13061 | bfd_boolean |
7fa3d080 | 13062 | expr_is_register (const expressionS *s) |
43cd72b9 BW |
13063 | { |
13064 | return (s->X_op == O_register); | |
13065 | } | |
13066 | ||
13067 | ||
13068 | /* Get the expression constant. | |
13069 | Calling this is illegal if expr_is_const () returns TRUE. */ | |
13070 | ||
13071 | offsetT | |
7fa3d080 | 13072 | get_expr_register (const expressionS *s) |
43cd72b9 | 13073 | { |
9c2799c2 | 13074 | gas_assert (expr_is_register (s)); |
43cd72b9 BW |
13075 | return s->X_add_number; |
13076 | } | |
13077 | ||
13078 | ||
e0001a05 NC |
13079 | /* Set the expression to a symbol + constant offset. */ |
13080 | ||
13081 | void | |
7fa3d080 | 13082 | set_expr_symbol_offset (expressionS *s, symbolS *sym, offsetT offset) |
e0001a05 NC |
13083 | { |
13084 | s->X_op = O_symbol; | |
13085 | s->X_add_symbol = sym; | |
13086 | s->X_op_symbol = NULL; /* unused */ | |
13087 | s->X_add_number = offset; | |
13088 | } | |
13089 | ||
13090 | ||
43cd72b9 BW |
13091 | /* Return TRUE if the two expressions are equal. */ |
13092 | ||
e0001a05 | 13093 | bfd_boolean |
7fa3d080 | 13094 | expr_is_equal (expressionS *s1, expressionS *s2) |
e0001a05 NC |
13095 | { |
13096 | if (s1->X_op != s2->X_op) | |
13097 | return FALSE; | |
13098 | if (s1->X_add_symbol != s2->X_add_symbol) | |
13099 | return FALSE; | |
13100 | if (s1->X_op_symbol != s2->X_op_symbol) | |
13101 | return FALSE; | |
13102 | if (s1->X_add_number != s2->X_add_number) | |
13103 | return FALSE; | |
13104 | return TRUE; | |
13105 | } | |
13106 | ||
13107 | ||
13108 | static void | |
7fa3d080 | 13109 | copy_expr (expressionS *dst, const expressionS *src) |
e0001a05 NC |
13110 | { |
13111 | memcpy (dst, src, sizeof (expressionS)); | |
13112 | } | |
13113 | ||
13114 | \f | |
9456465c | 13115 | /* Support for the "--rename-section" option. */ |
e0001a05 NC |
13116 | |
13117 | struct rename_section_struct | |
13118 | { | |
e4a0c708 | 13119 | const char *old_name; |
e0001a05 NC |
13120 | char *new_name; |
13121 | struct rename_section_struct *next; | |
13122 | }; | |
13123 | ||
13124 | static struct rename_section_struct *section_rename; | |
13125 | ||
13126 | ||
9456465c BW |
13127 | /* Parse the string "oldname=new_name(:oldname2=new_name2)*" and add |
13128 | entries to the section_rename list. Note: Specifying multiple | |
13129 | renamings separated by colons is not documented and is retained only | |
13130 | for backward compatibility. */ | |
e0001a05 | 13131 | |
7fa3d080 BW |
13132 | static void |
13133 | build_section_rename (const char *arg) | |
e0001a05 | 13134 | { |
9456465c | 13135 | struct rename_section_struct *r; |
e0001a05 NC |
13136 | char *this_arg = NULL; |
13137 | char *next_arg = NULL; | |
13138 | ||
9456465c | 13139 | for (this_arg = xstrdup (arg); this_arg != NULL; this_arg = next_arg) |
e0001a05 | 13140 | { |
9456465c BW |
13141 | char *old_name, *new_name; |
13142 | ||
e0001a05 NC |
13143 | if (this_arg) |
13144 | { | |
13145 | next_arg = strchr (this_arg, ':'); | |
13146 | if (next_arg) | |
13147 | { | |
13148 | *next_arg = '\0'; | |
13149 | next_arg++; | |
13150 | } | |
13151 | } | |
e0001a05 | 13152 | |
9456465c BW |
13153 | old_name = this_arg; |
13154 | new_name = strchr (this_arg, '='); | |
e0001a05 | 13155 | |
9456465c BW |
13156 | if (*old_name == '\0') |
13157 | { | |
13158 | as_warn (_("ignoring extra '-rename-section' delimiter ':'")); | |
13159 | continue; | |
13160 | } | |
13161 | if (!new_name || new_name[1] == '\0') | |
13162 | { | |
13163 | as_warn (_("ignoring invalid '-rename-section' specification: '%s'"), | |
13164 | old_name); | |
13165 | continue; | |
13166 | } | |
13167 | *new_name = '\0'; | |
13168 | new_name++; | |
e0001a05 | 13169 | |
9456465c BW |
13170 | /* Check for invalid section renaming. */ |
13171 | for (r = section_rename; r != NULL; r = r->next) | |
13172 | { | |
13173 | if (strcmp (r->old_name, old_name) == 0) | |
13174 | as_bad (_("section %s renamed multiple times"), old_name); | |
13175 | if (strcmp (r->new_name, new_name) == 0) | |
13176 | as_bad (_("multiple sections remapped to output section %s"), | |
13177 | new_name); | |
13178 | } | |
e0001a05 | 13179 | |
9456465c | 13180 | /* Now add it. */ |
325801bd | 13181 | r = XNEW (struct rename_section_struct); |
9456465c BW |
13182 | r->old_name = xstrdup (old_name); |
13183 | r->new_name = xstrdup (new_name); | |
13184 | r->next = section_rename; | |
13185 | section_rename = r; | |
e0001a05 | 13186 | } |
e0001a05 NC |
13187 | } |
13188 | ||
13189 | ||
9456465c | 13190 | char * |
e4a0c708 | 13191 | xtensa_section_rename (const char *name) |
e0001a05 NC |
13192 | { |
13193 | struct rename_section_struct *r = section_rename; | |
13194 | ||
13195 | for (r = section_rename; r != NULL; r = r->next) | |
43cd72b9 BW |
13196 | { |
13197 | if (strcmp (r->old_name, name) == 0) | |
13198 | return r->new_name; | |
13199 | } | |
e0001a05 | 13200 | |
e4a0c708 | 13201 | return (char *) name; |
e0001a05 | 13202 | } |