Commit | Line | Data |
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3d3c5039 | 1 | /* tc-mips.c -- assemble code for a MIPS chip. |
fb251650 | 2 | Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc. |
3d3c5039 ILT |
3 | Contributed by the OSF and Ralph Campbell. |
4 | Written by Keith Knowles and Ralph Campbell, working independently. | |
8358c818 ILT |
5 | Modified for ECOFF and R4000 support by Ian Lance Taylor of Cygnus |
6 | Support. | |
3d3c5039 ILT |
7 | |
8 | This file is part of GAS. | |
9 | ||
10 | GAS is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2, or (at your option) | |
13 | any later version. | |
14 | ||
15 | GAS is distributed in the hope that it will be useful, | |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
fb251650 ILT |
21 | along with GAS; see the file COPYING. If not, write to the Free |
22 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
23 | 02111-1307, USA. */ | |
3d3c5039 ILT |
24 | |
25 | #include "as.h" | |
8358c818 | 26 | #include "config.h" |
9da4c5d1 | 27 | #include "subsegs.h" |
b2b8c24e | 28 | #include "libiberty.h" |
3d3c5039 ILT |
29 | |
30 | #include <ctype.h> | |
31 | ||
1dc1e798 | 32 | #ifdef USE_STDARG |
3d3c5039 | 33 | #include <stdarg.h> |
1dc1e798 KR |
34 | #endif |
35 | #ifdef USE_VARARGS | |
3d3c5039 | 36 | #include <varargs.h> |
1dc1e798 | 37 | #endif |
3d3c5039 | 38 | |
918692a5 | 39 | #include "opcode/mips.h" |
3d3c5039 | 40 | |
739708fa KR |
41 | #ifdef OBJ_MAYBE_ELF |
42 | /* Clean up namespace so we can include obj-elf.h too. */ | |
43 | static int mips_output_flavor () { return OUTPUT_FLAVOR; } | |
44 | #undef OBJ_PROCESS_STAB | |
45 | #undef OUTPUT_FLAVOR | |
46 | #undef S_GET_ALIGN | |
47 | #undef S_GET_SIZE | |
48 | #undef S_SET_ALIGN | |
49 | #undef S_SET_SIZE | |
50 | #undef TARGET_SYMBOL_FIELDS | |
51 | #undef obj_frob_file | |
52 | #undef obj_frob_symbol | |
53 | #undef obj_pop_insert | |
54 | #undef obj_sec_sym_ok_for_reloc | |
55 | ||
56 | #include "obj-elf.h" | |
57 | /* Fix any of them that we actually care about. */ | |
58 | #undef OUTPUT_FLAVOR | |
59 | #define OUTPUT_FLAVOR mips_output_flavor() | |
60 | #endif | |
61 | ||
62 | #if defined (OBJ_ELF) | |
f2a663d3 | 63 | #include "elf/mips.h" |
1dc1e798 | 64 | #endif |
f2a663d3 | 65 | |
739708fa | 66 | #ifndef ECOFF_DEBUGGING |
c625fc23 | 67 | #define NO_ECOFF_DEBUGGING |
739708fa KR |
68 | #define ECOFF_DEBUGGING 0 |
69 | #endif | |
70 | ||
22ba90ce ILT |
71 | #include "ecoff.h" |
72 | ||
a8aed9dd | 73 | #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) |
f2a663d3 | 74 | static char *mips_regmask_frag; |
a8aed9dd | 75 | #endif |
f2a663d3 | 76 | |
3d3c5039 | 77 | #define AT 1 |
9226253a | 78 | #define PIC_CALL_REG 25 |
b2b8c24e ILT |
79 | #define KT0 26 |
80 | #define KT1 27 | |
670a50eb | 81 | #define GP 28 |
9226253a ILT |
82 | #define SP 29 |
83 | #define FP 30 | |
3d3c5039 ILT |
84 | #define RA 31 |
85 | ||
1dc1e798 | 86 | extern int target_big_endian; |
88225433 | 87 | |
7f9880e5 ILT |
88 | /* 1 is we should use the 64 bit MIPS ELF ABI, 0 if we should use the |
89 | 32 bit ABI. This has no meaning for ECOFF. */ | |
90 | static int mips_64; | |
91 | ||
04cb3372 | 92 | /* The default target format to use. */ |
1dc1e798 KR |
93 | const char * |
94 | mips_target_format () | |
95 | { | |
96 | switch (OUTPUT_FLAVOR) | |
97 | { | |
98 | case bfd_target_aout_flavour: | |
99 | return target_big_endian ? "a.out-mips-big" : "a.out-mips-little"; | |
100 | case bfd_target_ecoff_flavour: | |
101 | return target_big_endian ? "ecoff-bigmips" : "ecoff-littlemips"; | |
102 | case bfd_target_elf_flavour: | |
7f9880e5 ILT |
103 | return (target_big_endian |
104 | ? (mips_64 ? "elf64-bigmips" : "elf32-bigmips") | |
105 | : (mips_64 ? "elf64-littlemips" : "elf32-littlemips")); | |
1dc1e798 KR |
106 | default: |
107 | abort (); | |
108 | } | |
109 | } | |
04cb3372 | 110 | |
d2c71068 | 111 | /* The name of the readonly data section. */ |
1dc1e798 KR |
112 | #define RDATA_SECTION_NAME (OUTPUT_FLAVOR == bfd_target_aout_flavour \ |
113 | ? ".data" \ | |
114 | : OUTPUT_FLAVOR == bfd_target_ecoff_flavour \ | |
115 | ? ".rdata" \ | |
116 | : OUTPUT_FLAVOR == bfd_target_elf_flavour \ | |
117 | ? ".rodata" \ | |
118 | : (abort (), "")) | |
d2c71068 | 119 | |
1aa6938e ILT |
120 | /* These variables are filled in with the masks of registers used. |
121 | The object format code reads them and puts them in the appropriate | |
122 | place. */ | |
123 | unsigned long mips_gprmask; | |
124 | unsigned long mips_cprmask[4]; | |
125 | ||
1051c97f ILT |
126 | /* MIPS ISA (Instruction Set Architecture) level (may be changed |
127 | temporarily using .set mipsN). */ | |
8358c818 ILT |
128 | static int mips_isa = -1; |
129 | ||
1051c97f ILT |
130 | /* MIPS ISA we are using for this output file. */ |
131 | static int file_mips_isa; | |
132 | ||
8c63448a | 133 | /* The CPU type as a number: 2000, 3000, 4000, 4400, etc. */ |
4bb0cc41 | 134 | static int mips_cpu = -1; |
8c63448a | 135 | |
b2b8c24e ILT |
136 | /* Whether the 4650 instructions (mad/madu) are permitted. */ |
137 | static int mips_4650 = -1; | |
138 | ||
e532b44c ILT |
139 | /* Whether the 4010 instructions are permitted. */ |
140 | static int mips_4010 = -1; | |
141 | ||
c625fc23 JSC |
142 | /* Whether the 4100 MADD16 and DMADD16 are permitted. */ |
143 | static int mips_4100 = -1; | |
144 | ||
e532b44c ILT |
145 | /* Whether the processor uses hardware interlocks, and thus does not |
146 | require nops to be inserted. */ | |
147 | static int interlocks = -1; | |
148 | ||
344a8d61 JSC |
149 | /* As with "interlocks" this is used by hardware that has FP |
150 | (co-processor) interlocks. */ | |
151 | static int cop_interlocks = -1; | |
152 | ||
d9aba805 ILT |
153 | /* MIPS PIC level. */ |
154 | ||
155 | enum mips_pic_level | |
156 | { | |
157 | /* Do not generate PIC code. */ | |
158 | NO_PIC, | |
159 | ||
160 | /* Generate PIC code as in Irix 4. This is not implemented, and I'm | |
161 | not sure what it is supposed to do. */ | |
162 | IRIX4_PIC, | |
163 | ||
164 | /* Generate PIC code as in the SVR4 MIPS ABI. */ | |
165 | SVR4_PIC, | |
166 | ||
167 | /* Generate PIC code without using a global offset table: the data | |
168 | segment has a maximum size of 64K, all data references are off | |
169 | the $gp register, and all text references are PC relative. This | |
170 | is used on some embedded systems. */ | |
171 | EMBEDDED_PIC | |
172 | }; | |
173 | ||
174 | static enum mips_pic_level mips_pic; | |
9226253a | 175 | |
fb251650 ILT |
176 | /* 1 if we should generate 32 bit offsets from the GP register in |
177 | SVR4_PIC mode. Currently has no meaning in other modes. */ | |
178 | static int mips_big_got; | |
179 | ||
8ea7f4e8 ILT |
180 | /* 1 if trap instructions should used for overflow rather than break |
181 | instructions. */ | |
182 | static int mips_trap; | |
183 | ||
3d3c5039 ILT |
184 | static int mips_warn_about_macros; |
185 | static int mips_noreorder; | |
0dd2d296 | 186 | static int mips_any_noreorder; |
3d3c5039 ILT |
187 | static int mips_nomove; |
188 | static int mips_noat; | |
189 | static int mips_nobopt; | |
190 | ||
670a50eb ILT |
191 | /* The size of the small data section. */ |
192 | static int g_switch_value = 8; | |
42562568 ILT |
193 | /* Whether the -G option was used. */ |
194 | static int g_switch_seen = 0; | |
670a50eb | 195 | |
3d3c5039 ILT |
196 | #define N_RMASK 0xc4 |
197 | #define N_VFP 0xd4 | |
198 | ||
d8a1c247 KR |
199 | /* If we can determine in advance that GP optimization won't be |
200 | possible, we can skip the relaxation stuff that tries to produce | |
201 | GP-relative references. This makes delay slot optimization work | |
202 | better. | |
203 | ||
204 | This function can only provide a guess, but it seems to work for | |
205 | gcc output. If it guesses wrong, the only loss should be in | |
206 | efficiency; it shouldn't introduce any bugs. | |
207 | ||
208 | I don't know if a fix is needed for the SVR4_PIC mode. I've only | |
209 | fixed it for the non-PIC mode. KR 95/04/07 */ | |
210 | static int nopic_need_relax PARAMS ((symbolS *)); | |
211 | ||
3d3c5039 ILT |
212 | /* handle of the OPCODE hash table */ |
213 | static struct hash_control *op_hash = NULL; | |
214 | ||
215 | /* This array holds the chars that always start a comment. If the | |
216 | pre-processor is disabled, these aren't very useful */ | |
217 | const char comment_chars[] = "#"; | |
218 | ||
219 | /* This array holds the chars that only start a comment at the beginning of | |
220 | a line. If the line seems to have the form '# 123 filename' | |
221 | .line and .file directives will appear in the pre-processed output */ | |
222 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
223 | first line of the input file. This is because the compiler outputs | |
224 | #NO_APP at the beginning of its output. */ | |
225 | /* Also note that C style comments are always supported. */ | |
226 | const char line_comment_chars[] = "#"; | |
227 | ||
228 | /* This array holds machine specific line separator characters. */ | |
229 | const char line_separator_chars[] = ""; | |
230 | ||
231 | /* Chars that can be used to separate mant from exp in floating point nums */ | |
232 | const char EXP_CHARS[] = "eE"; | |
233 | ||
234 | /* Chars that mean this number is a floating point constant */ | |
235 | /* As in 0f12.456 */ | |
236 | /* or 0d1.2345e12 */ | |
237 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
238 | ||
239 | /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be | |
240 | changed in read.c . Ideally it shouldn't have to know about it at all, | |
241 | but nothing is ideal around here. | |
242 | */ | |
243 | ||
670a50eb | 244 | static char *insn_error; |
3d3c5039 | 245 | |
22ba90ce | 246 | static int byte_order; |
3d3c5039 ILT |
247 | |
248 | static int auto_align = 1; | |
becfe05e ILT |
249 | |
250 | /* Symbol labelling the current insn. */ | |
251 | static symbolS *insn_label; | |
252 | ||
9226253a ILT |
253 | /* When outputting SVR4 PIC code, the assembler needs to know the |
254 | offset in the stack frame from which to restore the $gp register. | |
255 | This is set by the .cprestore pseudo-op, and saved in this | |
256 | variable. */ | |
0dd2d296 ILT |
257 | static offsetT mips_cprestore_offset = -1; |
258 | ||
259 | /* This is the register which holds the stack frame, as set by the | |
260 | .frame pseudo-op. This is needed to implement .cprestore. */ | |
261 | static int mips_frame_reg = SP; | |
9226253a | 262 | |
becfe05e ILT |
263 | /* To output NOP instructions correctly, we need to keep information |
264 | about the previous two instructions. */ | |
265 | ||
0aa07269 ILT |
266 | /* Whether we are optimizing. The default value of 2 means to remove |
267 | unneeded NOPs and swap branch instructions when possible. A value | |
268 | of 1 means to not swap branches. A value of 0 means to always | |
269 | insert NOPs. */ | |
270 | static int mips_optimize = 2; | |
4e95866e | 271 | |
22ba90ce ILT |
272 | /* Debugging level. -g sets this to 2. -gN sets this to N. -g0 is |
273 | equivalent to seeing no -g option at all. */ | |
274 | static int mips_debug = 0; | |
275 | ||
becfe05e ILT |
276 | /* The previous instruction. */ |
277 | static struct mips_cl_insn prev_insn; | |
278 | ||
279 | /* The instruction before prev_insn. */ | |
280 | static struct mips_cl_insn prev_prev_insn; | |
281 | ||
282 | /* If we don't want information for prev_insn or prev_prev_insn, we | |
283 | point the insn_mo field at this dummy integer. */ | |
284 | static const struct mips_opcode dummy_opcode = { 0 }; | |
285 | ||
286 | /* Non-zero if prev_insn is valid. */ | |
287 | static int prev_insn_valid; | |
288 | ||
289 | /* The frag for the previous instruction. */ | |
290 | static struct frag *prev_insn_frag; | |
291 | ||
292 | /* The offset into prev_insn_frag for the previous instruction. */ | |
293 | static long prev_insn_where; | |
294 | ||
295 | /* The reloc for the previous instruction, if any. */ | |
296 | static fixS *prev_insn_fixp; | |
297 | ||
298 | /* Non-zero if the previous instruction was in a delay slot. */ | |
299 | static int prev_insn_is_delay_slot; | |
4e95866e ILT |
300 | |
301 | /* Non-zero if the previous instruction was in a .set noreorder. */ | |
302 | static int prev_insn_unreordered; | |
303 | ||
304 | /* Non-zero if the previous previous instruction was in a .set | |
305 | noreorder. */ | |
306 | static int prev_prev_insn_unreordered; | |
867a58b3 ILT |
307 | |
308 | /* For ECOFF and ELF, relocations against symbols are done in two | |
309 | parts, with a HI relocation and a LO relocation. Each relocation | |
310 | has only 16 bits of space to store an addend. This means that in | |
311 | order for the linker to handle carries correctly, it must be able | |
312 | to locate both the HI and the LO relocation. This means that the | |
313 | relocations must appear in order in the relocation table. | |
314 | ||
315 | In order to implement this, we keep track of each unmatched HI | |
316 | relocation. We then sort them so that they immediately precede the | |
317 | corresponding LO relocation. */ | |
318 | ||
319 | struct mips_hi_fixup | |
320 | { | |
321 | /* Next HI fixup. */ | |
322 | struct mips_hi_fixup *next; | |
323 | /* This fixup. */ | |
324 | fixS *fixp; | |
325 | /* The section this fixup is in. */ | |
326 | segT seg; | |
327 | }; | |
328 | ||
329 | /* The list of unmatched HI relocs. */ | |
330 | ||
331 | static struct mips_hi_fixup *mips_hi_fixup_list; | |
3d3c5039 | 332 | \f |
0dd2d296 ILT |
333 | /* Since the MIPS does not have multiple forms of PC relative |
334 | instructions, we do not have to do relaxing as is done on other | |
335 | platforms. However, we do have to handle GP relative addressing | |
336 | correctly, which turns out to be a similar problem. | |
337 | ||
338 | Every macro that refers to a symbol can occur in (at least) two | |
339 | forms, one with GP relative addressing and one without. For | |
340 | example, loading a global variable into a register generally uses | |
23dc1ae3 | 341 | a macro instruction like this: |
0dd2d296 ILT |
342 | lw $4,i |
343 | If i can be addressed off the GP register (this is true if it is in | |
344 | the .sbss or .sdata section, or if it is known to be smaller than | |
345 | the -G argument) this will generate the following instruction: | |
346 | lw $4,i($gp) | |
347 | This instruction will use a GPREL reloc. If i can not be addressed | |
348 | off the GP register, the following instruction sequence will be used: | |
349 | lui $at,i | |
350 | lw $4,i($at) | |
351 | In this case the first instruction will have a HI16 reloc, and the | |
352 | second reloc will have a LO16 reloc. Both relocs will be against | |
353 | the symbol i. | |
354 | ||
355 | The issue here is that we may not know whether i is GP addressable | |
356 | until after we see the instruction that uses it. Therefore, we | |
357 | want to be able to choose the final instruction sequence only at | |
358 | the end of the assembly. This is similar to the way other | |
23dc1ae3 | 359 | platforms choose the size of a PC relative instruction only at the |
0dd2d296 ILT |
360 | end of assembly. |
361 | ||
362 | When generating position independent code we do not use GP | |
23dc1ae3 ILT |
363 | addressing in quite the same way, but the issue still arises as |
364 | external symbols and local symbols must be handled differently. | |
0dd2d296 ILT |
365 | |
366 | We handle these issues by actually generating both possible | |
367 | instruction sequences. The longer one is put in a frag_var with | |
368 | type rs_machine_dependent. We encode what to do with the frag in | |
369 | the subtype field. We encode (1) the number of existing bytes to | |
370 | replace, (2) the number of new bytes to use, (3) the offset from | |
371 | the start of the existing bytes to the first reloc we must generate | |
372 | (that is, the offset is applied from the start of the existing | |
373 | bytes after they are replaced by the new bytes, if any), (4) the | |
374 | offset from the start of the existing bytes to the second reloc, | |
375 | (5) whether a third reloc is needed (the third reloc is always four | |
376 | bytes after the second reloc), and (6) whether to warn if this | |
377 | variant is used (this is sometimes needed if .set nomacro or .set | |
378 | noat is in effect). All these numbers are reasonably small. | |
379 | ||
380 | Generating two instruction sequences must be handled carefully to | |
23dc1ae3 ILT |
381 | ensure that delay slots are handled correctly. Fortunately, there |
382 | are a limited number of cases. When the second instruction | |
383 | sequence is generated, append_insn is directed to maintain the | |
384 | existing delay slot information, so it continues to apply to any | |
385 | code after the second instruction sequence. This means that the | |
386 | second instruction sequence must not impose any requirements not | |
387 | required by the first instruction sequence. | |
0dd2d296 ILT |
388 | |
389 | These variant frags are then handled in functions called by the | |
390 | machine independent code. md_estimate_size_before_relax returns | |
391 | the final size of the frag. md_convert_frag sets up the final form | |
392 | of the frag. tc_gen_reloc adjust the first reloc and adds a second | |
393 | one if needed. */ | |
394 | #define RELAX_ENCODE(old, new, reloc1, reloc2, reloc3, warn) \ | |
395 | ((relax_substateT) \ | |
396 | (((old) << 24) \ | |
397 | | ((new) << 16) \ | |
398 | | (((reloc1) + 64) << 9) \ | |
399 | | (((reloc2) + 64) << 2) \ | |
400 | | ((reloc3) ? (1 << 1) : 0) \ | |
401 | | ((warn) ? 1 : 0))) | |
402 | #define RELAX_OLD(i) (((i) >> 24) & 0xff) | |
403 | #define RELAX_NEW(i) (((i) >> 16) & 0xff) | |
483971bd KR |
404 | #define RELAX_RELOC1(i) ((bfd_vma)(((i) >> 9) & 0x7f) - 64) |
405 | #define RELAX_RELOC2(i) ((bfd_vma)(((i) >> 2) & 0x7f) - 64) | |
0dd2d296 ILT |
406 | #define RELAX_RELOC3(i) (((i) >> 1) & 1) |
407 | #define RELAX_WARN(i) ((i) & 1) | |
408 | \f | |
3d3c5039 ILT |
409 | /* Prototypes for static functions. */ |
410 | ||
411 | #ifdef __STDC__ | |
412 | #define internalError() \ | |
413 | as_fatal ("internal Error, line %d, %s", __LINE__, __FILE__) | |
414 | #else | |
415 | #define internalError() as_fatal ("MIPS internal Error"); | |
416 | #endif | |
417 | ||
becfe05e | 418 | static int insn_uses_reg PARAMS ((struct mips_cl_insn *ip, |
604633ae | 419 | unsigned int reg, int fpr)); |
fb251650 | 420 | static int reg_needs_delay PARAMS ((int)); |
0dd2d296 ILT |
421 | static void append_insn PARAMS ((char *place, |
422 | struct mips_cl_insn * ip, | |
670a50eb | 423 | expressionS * p, |
867a58b3 ILT |
424 | bfd_reloc_code_real_type r, |
425 | boolean)); | |
becfe05e ILT |
426 | static void mips_no_prev_insn PARAMS ((void)); |
427 | static void mips_emit_delays PARAMS ((void)); | |
c625fc23 | 428 | #ifdef USE_STDARG |
0dd2d296 | 429 | static void macro_build PARAMS ((char *place, int *counter, expressionS * ep, |
3d3c5039 ILT |
430 | const char *name, const char *fmt, |
431 | ...)); | |
c625fc23 JSC |
432 | #else |
433 | static void macro_build (); | |
434 | #endif | |
0dd2d296 ILT |
435 | static void macro_build_lui PARAMS ((char *place, int *counter, |
436 | expressionS * ep, int regnum)); | |
6e8dda9c | 437 | static void set_at PARAMS ((int *counter, int reg, int unsignedp)); |
670a50eb | 438 | static void check_absolute_expr PARAMS ((struct mips_cl_insn * ip, |
19ed8960 | 439 | expressionS *)); |
d8a1c247 | 440 | static void load_register PARAMS ((int *, int, expressionS *, int)); |
0dd2d296 | 441 | static void load_address PARAMS ((int *counter, int reg, expressionS *ep)); |
670a50eb | 442 | static void macro PARAMS ((struct mips_cl_insn * ip)); |
917fae09 SS |
443 | #ifdef LOSING_COMPILER |
444 | static void macro2 PARAMS ((struct mips_cl_insn * ip)); | |
445 | #endif | |
670a50eb ILT |
446 | static void mips_ip PARAMS ((char *str, struct mips_cl_insn * ip)); |
447 | static int my_getSmallExpression PARAMS ((expressionS * ep, char *str)); | |
448 | static void my_getExpression PARAMS ((expressionS * ep, char *str)); | |
3d3c5039 | 449 | static symbolS *get_symbol PARAMS ((void)); |
23dc1ae3 | 450 | static void mips_align PARAMS ((int to, int fill, symbolS *label)); |
3d3c5039 ILT |
451 | static void s_align PARAMS ((int)); |
452 | static void s_change_sec PARAMS ((int)); | |
453 | static void s_cons PARAMS ((int)); | |
3d3c5039 | 454 | static void s_float_cons PARAMS ((int)); |
c1444ec4 | 455 | static void s_mips_globl PARAMS ((int)); |
3d3c5039 ILT |
456 | static void s_option PARAMS ((int)); |
457 | static void s_mipsset PARAMS ((int)); | |
9226253a ILT |
458 | static void s_abicalls PARAMS ((int)); |
459 | static void s_cpload PARAMS ((int)); | |
460 | static void s_cprestore PARAMS ((int)); | |
0dd2d296 ILT |
461 | static void s_gpword PARAMS ((int)); |
462 | static void s_cpadd PARAMS ((int)); | |
3d3c5039 ILT |
463 | static void md_obj_begin PARAMS ((void)); |
464 | static void md_obj_end PARAMS ((void)); | |
465 | static long get_number PARAMS ((void)); | |
466 | static void s_ent PARAMS ((int)); | |
467 | static void s_mipsend PARAMS ((int)); | |
468 | static void s_file PARAMS ((int)); | |
3d3c5039 ILT |
469 | \f |
470 | /* Pseudo-op table. | |
471 | ||
472 | The following pseudo-ops from the Kane and Heinrich MIPS book | |
473 | should be defined here, but are currently unsupported: .alias, | |
474 | .galive, .gjaldef, .gjrlive, .livereg, .noalias. | |
475 | ||
476 | The following pseudo-ops from the Kane and Heinrich MIPS book are | |
477 | specific to the type of debugging information being generated, and | |
478 | should be defined by the object format: .aent, .begin, .bend, | |
479 | .bgnb, .end, .endb, .ent, .fmask, .frame, .loc, .mask, .verstamp, | |
480 | .vreg. | |
481 | ||
482 | The following pseudo-ops from the Kane and Heinrich MIPS book are | |
483 | not MIPS CPU specific, but are also not specific to the object file | |
484 | format. This file is probably the best place to define them, but | |
485 | they are not currently supported: .asm0, .endr, .lab, .repeat, | |
486 | .struct, .weakext. */ | |
487 | ||
739708fa | 488 | static const pseudo_typeS mips_pseudo_table[] = |
3d3c5039 | 489 | { |
670a50eb ILT |
490 | /* MIPS specific pseudo-ops. */ |
491 | {"option", s_option, 0}, | |
492 | {"set", s_mipsset, 0}, | |
dd3f1f76 ILT |
493 | {"rdata", s_change_sec, 'r'}, |
494 | {"sdata", s_change_sec, 's'}, | |
495 | {"livereg", s_ignore, 0}, | |
739708fa KR |
496 | {"abicalls", s_abicalls, 0}, |
497 | {"cpload", s_cpload, 0}, | |
498 | {"cprestore", s_cprestore, 0}, | |
499 | {"gpword", s_gpword, 0}, | |
500 | {"cpadd", s_cpadd, 0}, | |
3d3c5039 | 501 | |
670a50eb | 502 | /* Relatively generic pseudo-ops that happen to be used on MIPS |
3d3c5039 | 503 | chips. */ |
739708fa | 504 | {"asciiz", stringer, 1}, |
670a50eb ILT |
505 | {"bss", s_change_sec, 'b'}, |
506 | {"err", s_err, 0}, | |
507 | {"half", s_cons, 1}, | |
52aa70b5 | 508 | {"dword", s_cons, 3}, |
3d3c5039 | 509 | |
670a50eb | 510 | /* These pseudo-ops are defined in read.c, but must be overridden |
3d3c5039 | 511 | here for one reason or another. */ |
670a50eb ILT |
512 | {"align", s_align, 0}, |
513 | {"byte", s_cons, 0}, | |
514 | {"data", s_change_sec, 'd'}, | |
becfe05e | 515 | {"double", s_float_cons, 'd'}, |
becfe05e | 516 | {"float", s_float_cons, 'f'}, |
c1444ec4 ILT |
517 | {"globl", s_mips_globl, 0}, |
518 | {"global", s_mips_globl, 0}, | |
eb8fd0e9 ILT |
519 | {"hword", s_cons, 1}, |
520 | {"int", s_cons, 2}, | |
521 | {"long", s_cons, 2}, | |
522 | {"octa", s_cons, 4}, | |
523 | {"quad", s_cons, 3}, | |
524 | {"short", s_cons, 1}, | |
525 | {"single", s_float_cons, 'f'}, | |
670a50eb ILT |
526 | {"text", s_change_sec, 't'}, |
527 | {"word", s_cons, 2}, | |
739708fa KR |
528 | { 0 }, |
529 | }; | |
3d3c5039 | 530 | |
739708fa | 531 | static const pseudo_typeS mips_nonecoff_pseudo_table[] = { |
670a50eb | 532 | /* These pseudo-ops should be defined by the object file format. |
0dd2d296 | 533 | However, a.out doesn't support them, so we have versions here. */ |
670a50eb | 534 | {"aent", s_ent, 1}, |
9226253a | 535 | {"bgnb", s_ignore, 0}, |
670a50eb | 536 | {"end", s_mipsend, 0}, |
9226253a | 537 | {"endb", s_ignore, 0}, |
670a50eb ILT |
538 | {"ent", s_ent, 0}, |
539 | {"file", s_file, 0}, | |
540 | {"fmask", s_ignore, 'F'}, | |
541 | {"frame", s_ignore, 0}, | |
542 | {"loc", s_ignore, 0}, | |
543 | {"mask", s_ignore, 'R'}, | |
544 | {"verstamp", s_ignore, 0}, | |
739708fa KR |
545 | { 0 }, |
546 | }; | |
61420a20 | 547 | |
739708fa KR |
548 | extern void pop_insert PARAMS ((const pseudo_typeS *)); |
549 | ||
550 | void | |
551 | mips_pop_insert () | |
552 | { | |
553 | pop_insert (mips_pseudo_table); | |
554 | if (! ECOFF_DEBUGGING) | |
555 | pop_insert (mips_nonecoff_pseudo_table); | |
739708fa | 556 | } |
3d3c5039 | 557 | \f |
3d3c5039 ILT |
558 | static char *expr_end; |
559 | ||
867a58b3 ILT |
560 | /* Expressions which appear in instructions. These are set by |
561 | mips_ip. */ | |
562 | ||
3d3c5039 ILT |
563 | static expressionS imm_expr; |
564 | static expressionS offset_expr; | |
867a58b3 ILT |
565 | |
566 | /* Relocs associated with imm_expr and offset_expr. */ | |
567 | ||
3d3c5039 ILT |
568 | static bfd_reloc_code_real_type imm_reloc; |
569 | static bfd_reloc_code_real_type offset_reloc; | |
570 | ||
867a58b3 ILT |
571 | /* This is set by mips_ip if imm_reloc is an unmatched HI16_S reloc. */ |
572 | ||
573 | static boolean imm_unmatched_hi; | |
574 | ||
3d3c5039 ILT |
575 | /* |
576 | * This function is called once, at assembler startup time. It should | |
577 | * set up all the tables, etc. that the MD part of the assembler will need. | |
578 | */ | |
579 | void | |
670a50eb | 580 | md_begin () |
3d3c5039 | 581 | { |
0dd2d296 | 582 | boolean ok = false; |
604633ae | 583 | register const char *retval = NULL; |
670a50eb | 584 | register unsigned int i = 0; |
3d3c5039 | 585 | |
8358c818 ILT |
586 | if (mips_isa == -1) |
587 | { | |
8c63448a ILT |
588 | const char *cpu; |
589 | char *a = NULL; | |
590 | ||
591 | cpu = TARGET_CPU; | |
592 | if (strcmp (cpu + (sizeof TARGET_CPU) - 3, "el") == 0) | |
593 | { | |
594 | a = xmalloc (sizeof TARGET_CPU); | |
595 | strcpy (a, TARGET_CPU); | |
596 | a[(sizeof TARGET_CPU) - 3] = '\0'; | |
597 | cpu = a; | |
598 | } | |
599 | ||
600 | if (strcmp (cpu, "mips") == 0) | |
601 | { | |
602 | mips_isa = 1; | |
4bb0cc41 ILT |
603 | if (mips_cpu == -1) |
604 | mips_cpu = 3000; | |
8c63448a ILT |
605 | } |
606 | else if (strcmp (cpu, "r6000") == 0 | |
607 | || strcmp (cpu, "mips2") == 0) | |
608 | { | |
609 | mips_isa = 2; | |
4bb0cc41 ILT |
610 | if (mips_cpu == -1) |
611 | mips_cpu = 6000; | |
8c63448a ILT |
612 | } |
613 | else if (strcmp (cpu, "mips64") == 0 | |
614 | || strcmp (cpu, "r4000") == 0 | |
615 | || strcmp (cpu, "mips3") == 0) | |
616 | { | |
617 | mips_isa = 3; | |
4bb0cc41 ILT |
618 | if (mips_cpu == -1) |
619 | mips_cpu = 4000; | |
8c63448a ILT |
620 | } |
621 | else if (strcmp (cpu, "r4400") == 0) | |
622 | { | |
623 | mips_isa = 3; | |
4bb0cc41 ILT |
624 | if (mips_cpu == -1) |
625 | mips_cpu = 4400; | |
8c63448a ILT |
626 | } |
627 | else if (strcmp (cpu, "mips64orion") == 0 | |
628 | || strcmp (cpu, "r4600") == 0) | |
629 | { | |
630 | mips_isa = 3; | |
4bb0cc41 ILT |
631 | if (mips_cpu == -1) |
632 | mips_cpu = 4600; | |
8c63448a | 633 | } |
b2b8c24e ILT |
634 | else if (strcmp (cpu, "r4650") == 0) |
635 | { | |
636 | mips_isa = 3; | |
637 | if (mips_cpu == -1) | |
638 | mips_cpu = 4650; | |
639 | if (mips_4650 == -1) | |
640 | mips_4650 = 1; | |
641 | } | |
c625fc23 JSC |
642 | else if (strcmp (cpu, "mips64vr4300") == 0) |
643 | { | |
644 | mips_isa = 3; | |
645 | if (mips_cpu == -1) | |
646 | mips_cpu = 4300; | |
647 | } | |
648 | else if (strcmp (cpu, "mips64vr4100") == 0) | |
649 | { | |
650 | mips_isa = 3; | |
651 | if (mips_cpu == -1) | |
652 | mips_cpu = 4100; | |
653 | if (mips_4100 == -1) | |
654 | mips_4100 = 1; | |
655 | } | |
e532b44c ILT |
656 | else if (strcmp (cpu, "r4010") == 0) |
657 | { | |
658 | mips_isa = 2; | |
659 | if (mips_cpu == -1) | |
660 | mips_cpu = 4010; | |
661 | if (mips_4010 == -1) | |
662 | mips_4010 = 1; | |
663 | } | |
d8a1c247 KR |
664 | else if (strcmp (cpu, "r8000") == 0 |
665 | || strcmp (cpu, "mips4") == 0) | |
666 | { | |
667 | mips_isa = 4; | |
668 | if (mips_cpu == -1) | |
669 | mips_cpu = 8000; | |
670 | } | |
671 | else if (strcmp (cpu, "r10000") == 0) | |
672 | { | |
673 | mips_isa = 4; | |
674 | if (mips_cpu == -1) | |
675 | mips_cpu = 10000; | |
676 | } | |
8358c818 | 677 | else |
8c63448a ILT |
678 | { |
679 | mips_isa = 1; | |
4bb0cc41 ILT |
680 | if (mips_cpu == -1) |
681 | mips_cpu = 3000; | |
8c63448a ILT |
682 | } |
683 | ||
684 | if (a != NULL) | |
685 | free (a); | |
8358c818 ILT |
686 | } |
687 | ||
b2b8c24e ILT |
688 | if (mips_4650 < 0) |
689 | mips_4650 = 0; | |
690 | ||
e532b44c ILT |
691 | if (mips_4010 < 0) |
692 | mips_4010 = 0; | |
693 | ||
c625fc23 JSC |
694 | if (mips_4100 < 0) |
695 | mips_4100 = 0; | |
696 | ||
344a8d61 | 697 | if (mips_4650 || mips_4010 || mips_4100 || mips_cpu == 4300) |
e532b44c ILT |
698 | interlocks = 1; |
699 | else | |
700 | interlocks = 0; | |
701 | ||
344a8d61 JSC |
702 | if (mips_cpu == 4300) |
703 | cop_interlocks = 1; | |
704 | else | |
705 | cop_interlocks = 0; | |
706 | ||
8ea7f4e8 ILT |
707 | if (mips_isa < 2 && mips_trap) |
708 | as_bad ("trap exception not supported at ISA 1"); | |
709 | ||
97f99d11 ILT |
710 | switch (mips_isa) |
711 | { | |
712 | case 1: | |
713 | ok = bfd_set_arch_mach (stdoutput, bfd_arch_mips, 3000); | |
714 | break; | |
715 | case 2: | |
716 | ok = bfd_set_arch_mach (stdoutput, bfd_arch_mips, 6000); | |
717 | break; | |
718 | case 3: | |
719 | ok = bfd_set_arch_mach (stdoutput, bfd_arch_mips, 4000); | |
720 | break; | |
d8a1c247 KR |
721 | case 4: |
722 | ok = bfd_set_arch_mach (stdoutput, bfd_arch_mips, 8000); | |
723 | break; | |
97f99d11 ILT |
724 | } |
725 | if (! ok) | |
726 | as_warn ("Could not set architecture and machine"); | |
727 | ||
1051c97f ILT |
728 | file_mips_isa = mips_isa; |
729 | ||
13fe1379 ILT |
730 | op_hash = hash_new (); |
731 | ||
670a50eb ILT |
732 | for (i = 0; i < NUMOPCODES;) |
733 | { | |
734 | const char *name = mips_opcodes[i].name; | |
735 | ||
604633ae | 736 | retval = hash_insert (op_hash, name, (PTR) &mips_opcodes[i]); |
abdad6bc | 737 | if (retval != NULL) |
670a50eb ILT |
738 | { |
739 | fprintf (stderr, "internal error: can't hash `%s': %s\n", | |
740 | mips_opcodes[i].name, retval); | |
741 | as_fatal ("Broken assembler. No assembly attempted."); | |
742 | } | |
743 | do | |
744 | { | |
8358c818 ILT |
745 | if (mips_opcodes[i].pinfo != INSN_MACRO |
746 | && ((mips_opcodes[i].match & mips_opcodes[i].mask) | |
747 | != mips_opcodes[i].match)) | |
670a50eb ILT |
748 | { |
749 | fprintf (stderr, "internal error: bad opcode: `%s' \"%s\"\n", | |
750 | mips_opcodes[i].name, mips_opcodes[i].args); | |
751 | as_fatal ("Broken assembler. No assembly attempted."); | |
3d3c5039 | 752 | } |
670a50eb ILT |
753 | ++i; |
754 | } | |
755 | while ((i < NUMOPCODES) && !strcmp (mips_opcodes[i].name, name)); | |
3d3c5039 ILT |
756 | } |
757 | ||
becfe05e ILT |
758 | mips_no_prev_insn (); |
759 | ||
1aa6938e ILT |
760 | mips_gprmask = 0; |
761 | mips_cprmask[0] = 0; | |
762 | mips_cprmask[1] = 0; | |
763 | mips_cprmask[2] = 0; | |
764 | mips_cprmask[3] = 0; | |
765 | ||
8358c818 ILT |
766 | /* set the default alignment for the text section (2**2) */ |
767 | record_alignment (text_section, 2); | |
768 | ||
1dc1e798 KR |
769 | if (USE_GLOBAL_POINTER_OPT) |
770 | bfd_set_gp_size (stdoutput, g_switch_value); | |
abdad6bc | 771 | |
1dc1e798 KR |
772 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
773 | { | |
774 | /* Sections must be aligned to 16 byte boundaries. */ | |
775 | (void) bfd_set_section_alignment (stdoutput, text_section, 4); | |
776 | (void) bfd_set_section_alignment (stdoutput, data_section, 4); | |
777 | (void) bfd_set_section_alignment (stdoutput, bss_section, 4); | |
778 | ||
779 | /* Create a .reginfo section for register masks and a .mdebug | |
780 | section for debugging information. */ | |
781 | { | |
782 | segT seg; | |
783 | subsegT subseg; | |
784 | segT sec; | |
785 | ||
786 | seg = now_seg; | |
787 | subseg = now_subseg; | |
1dc1e798 | 788 | |
87178180 ILT |
789 | if (! mips_64) |
790 | { | |
791 | sec = subseg_new (".reginfo", (subsegT) 0); | |
8358c818 | 792 | |
87178180 ILT |
793 | /* The ABI says this section should be loaded so that the |
794 | running program can access it. */ | |
795 | (void) bfd_set_section_flags (stdoutput, sec, | |
796 | (SEC_ALLOC | SEC_LOAD | |
797 | | SEC_READONLY | SEC_DATA)); | |
798 | (void) bfd_set_section_alignment (stdoutput, sec, 2); | |
799 | ||
f2a663d3 | 800 | #ifdef OBJ_ELF |
87178180 | 801 | mips_regmask_frag = frag_more (sizeof (Elf32_External_RegInfo)); |
1dc1e798 | 802 | #endif |
87178180 ILT |
803 | } |
804 | else | |
805 | { | |
806 | /* The 64-bit ABI uses a .MIPS.options section rather than | |
807 | .reginfo section. */ | |
808 | sec = subseg_new (".MIPS.options", (subsegT) 0); | |
809 | (void) bfd_set_section_flags (stdoutput, sec, | |
810 | (SEC_ALLOC | SEC_LOAD | |
811 | | SEC_READONLY | SEC_DATA)); | |
812 | (void) bfd_set_section_alignment (stdoutput, sec, 3); | |
813 | ||
814 | #ifdef OBJ_ELF | |
815 | /* Set up the option header. */ | |
816 | { | |
817 | Elf_Internal_Options opthdr; | |
818 | char *f; | |
819 | ||
820 | opthdr.kind = ODK_REGINFO; | |
821 | opthdr.size = (sizeof (Elf_External_Options) | |
822 | + sizeof (Elf64_External_RegInfo)); | |
823 | opthdr.section = 0; | |
824 | opthdr.info = 0; | |
825 | f = frag_more (sizeof (Elf_External_Options)); | |
826 | bfd_mips_elf_swap_options_out (stdoutput, &opthdr, | |
827 | (Elf_External_Options *) f); | |
828 | ||
829 | mips_regmask_frag = frag_more (sizeof (Elf64_External_RegInfo)); | |
830 | } | |
831 | #endif | |
832 | } | |
f2a663d3 | 833 | |
739708fa KR |
834 | if (ECOFF_DEBUGGING) |
835 | { | |
836 | sec = subseg_new (".mdebug", (subsegT) 0); | |
837 | (void) bfd_set_section_flags (stdoutput, sec, | |
838 | SEC_HAS_CONTENTS | SEC_READONLY); | |
839 | (void) bfd_set_section_alignment (stdoutput, sec, 2); | |
840 | } | |
0dd2d296 | 841 | |
1dc1e798 KR |
842 | subseg_set (seg, subseg); |
843 | } | |
844 | } | |
f2a663d3 | 845 | |
739708fa KR |
846 | if (! ECOFF_DEBUGGING) |
847 | md_obj_begin (); | |
3d3c5039 ILT |
848 | } |
849 | ||
850 | void | |
13fe1379 | 851 | md_mips_end () |
3d3c5039 | 852 | { |
739708fa KR |
853 | if (! ECOFF_DEBUGGING) |
854 | md_obj_end (); | |
3d3c5039 ILT |
855 | } |
856 | ||
857 | void | |
670a50eb ILT |
858 | md_assemble (str) |
859 | char *str; | |
3d3c5039 | 860 | { |
670a50eb | 861 | struct mips_cl_insn insn; |
3d3c5039 | 862 | |
5ac34ac3 | 863 | imm_expr.X_op = O_absent; |
867a58b3 ILT |
864 | imm_reloc = BFD_RELOC_UNUSED; |
865 | imm_unmatched_hi = false; | |
5ac34ac3 | 866 | offset_expr.X_op = O_absent; |
867a58b3 | 867 | offset_reloc = BFD_RELOC_UNUSED; |
3d3c5039 | 868 | |
670a50eb ILT |
869 | mips_ip (str, &insn); |
870 | if (insn_error) | |
871 | { | |
872 | as_bad ("%s `%s'", insn_error, str); | |
873 | return; | |
874 | } | |
875 | if (insn.insn_mo->pinfo == INSN_MACRO) | |
876 | { | |
877 | macro (&insn); | |
3d3c5039 | 878 | } |
670a50eb ILT |
879 | else |
880 | { | |
5ac34ac3 | 881 | if (imm_expr.X_op != O_absent) |
867a58b3 ILT |
882 | append_insn ((char *) NULL, &insn, &imm_expr, imm_reloc, |
883 | imm_unmatched_hi); | |
5ac34ac3 | 884 | else if (offset_expr.X_op != O_absent) |
867a58b3 | 885 | append_insn ((char *) NULL, &insn, &offset_expr, offset_reloc, false); |
670a50eb | 886 | else |
867a58b3 | 887 | append_insn ((char *) NULL, &insn, NULL, BFD_RELOC_UNUSED, false); |
3d3c5039 ILT |
888 | } |
889 | } | |
890 | ||
becfe05e ILT |
891 | /* See whether instruction IP reads register REG. If FPR is non-zero, |
892 | REG is a floating point register. */ | |
893 | ||
894 | static int | |
895 | insn_uses_reg (ip, reg, fpr) | |
896 | struct mips_cl_insn *ip; | |
604633ae | 897 | unsigned int reg; |
becfe05e ILT |
898 | int fpr; |
899 | { | |
900 | /* Don't report on general register 0, since it never changes. */ | |
901 | if (! fpr && reg == 0) | |
902 | return 0; | |
903 | ||
904 | if (fpr) | |
905 | { | |
906 | /* If we are called with either $f0 or $f1, we must check $f0. | |
907 | This is not optimal, because it will introduce an unnecessary | |
908 | NOP between "lwc1 $f0" and "swc1 $f1". To fix this we would | |
909 | need to distinguish reading both $f0 and $f1 or just one of | |
910 | them. Note that we don't have to check the other way, | |
911 | because there is no instruction that sets both $f0 and $f1 | |
912 | and requires a delay. */ | |
913 | if ((ip->insn_mo->pinfo & INSN_READ_FPR_S) | |
604633ae ILT |
914 | && (((ip->insn_opcode >> OP_SH_FS) & OP_MASK_FS) |
915 | == (reg &~ (unsigned) 1))) | |
becfe05e ILT |
916 | return 1; |
917 | if ((ip->insn_mo->pinfo & INSN_READ_FPR_T) | |
604633ae ILT |
918 | && (((ip->insn_opcode >> OP_SH_FT) & OP_MASK_FT) |
919 | == (reg &~ (unsigned) 1))) | |
becfe05e ILT |
920 | return 1; |
921 | } | |
922 | else | |
923 | { | |
924 | if ((ip->insn_mo->pinfo & INSN_READ_GPR_S) | |
925 | && ((ip->insn_opcode >> OP_SH_RS) & OP_MASK_RS) == reg) | |
926 | return 1; | |
927 | if ((ip->insn_mo->pinfo & INSN_READ_GPR_T) | |
928 | && ((ip->insn_opcode >> OP_SH_RT) & OP_MASK_RT) == reg) | |
929 | return 1; | |
930 | } | |
931 | ||
932 | return 0; | |
933 | } | |
934 | ||
fb251650 ILT |
935 | /* This function returns true if modifying a register requires a |
936 | delay. */ | |
937 | ||
938 | static int | |
939 | reg_needs_delay (reg) | |
940 | int reg; | |
941 | { | |
942 | unsigned long prev_pinfo; | |
943 | ||
944 | prev_pinfo = prev_insn.insn_mo->pinfo; | |
945 | if (! mips_noreorder | |
946 | && mips_isa < 4 | |
947 | && ((prev_pinfo & INSN_LOAD_COPROC_DELAY) | |
948 | || (mips_isa < 2 | |
949 | && (prev_pinfo & INSN_LOAD_MEMORY_DELAY)))) | |
950 | { | |
951 | /* A load from a coprocessor or from memory. All load | |
952 | delays delay the use of general register rt for one | |
953 | instruction on the r3000. The r6000 and r4000 use | |
954 | interlocks. */ | |
955 | know (prev_pinfo & INSN_WRITE_GPR_T); | |
956 | if (reg == ((prev_insn.insn_opcode >> OP_SH_RT) & OP_MASK_RT)) | |
957 | return 1; | |
958 | } | |
959 | ||
960 | return 0; | |
961 | } | |
962 | ||
0dd2d296 ILT |
963 | /* Output an instruction. PLACE is where to put the instruction; if |
964 | it is NULL, this uses frag_more to get room. IP is the instruction | |
965 | information. ADDRESS_EXPR is an operand of the instruction to be | |
966 | used with RELOC_TYPE. */ | |
3d3c5039 | 967 | |
3d3c5039 | 968 | static void |
867a58b3 | 969 | append_insn (place, ip, address_expr, reloc_type, unmatched_hi) |
0dd2d296 | 970 | char *place; |
670a50eb ILT |
971 | struct mips_cl_insn *ip; |
972 | expressionS *address_expr; | |
973 | bfd_reloc_code_real_type reloc_type; | |
867a58b3 | 974 | boolean unmatched_hi; |
3d3c5039 | 975 | { |
1aa6938e | 976 | register unsigned long prev_pinfo, pinfo; |
670a50eb | 977 | char *f; |
becfe05e ILT |
978 | fixS *fixp; |
979 | int nops = 0; | |
3d3c5039 | 980 | |
1aa6938e ILT |
981 | prev_pinfo = prev_insn.insn_mo->pinfo; |
982 | pinfo = ip->insn_mo->pinfo; | |
983 | ||
0dd2d296 | 984 | if (place == NULL && ! mips_noreorder) |
becfe05e ILT |
985 | { |
986 | /* If the previous insn required any delay slots, see if we need | |
8358c818 | 987 | to insert a NOP or two. There are eight kinds of possible |
becfe05e | 988 | hazards, of which an instruction can have at most one type. |
8358c818 ILT |
989 | (1) a load from memory delay |
990 | (2) a load from a coprocessor delay | |
991 | (3) an unconditional branch delay | |
992 | (4) a conditional branch delay | |
993 | (5) a move to coprocessor register delay | |
994 | (6) a load coprocessor register from memory delay | |
995 | (7) a coprocessor condition code delay | |
996 | (8) a HI/LO special register delay | |
becfe05e ILT |
997 | |
998 | There are a lot of optimizations we could do that we don't. | |
999 | In particular, we do not, in general, reorder instructions. | |
1000 | If you use gcc with optimization, it will reorder | |
1001 | instructions and generally do much more optimization then we | |
1002 | do here; repeating all that work in the assembler would only | |
1003 | benefit hand written assembly code, and does not seem worth | |
1004 | it. */ | |
1005 | ||
1006 | /* This is how a NOP is emitted. */ | |
1007 | #define emit_nop() md_number_to_chars (frag_more (4), 0, 4) | |
1008 | ||
1009 | /* The previous insn might require a delay slot, depending upon | |
1010 | the contents of the current insn. */ | |
d8a1c247 | 1011 | if (mips_isa < 4 |
5af96dce ILT |
1012 | && (((prev_pinfo & INSN_LOAD_COPROC_DELAY) |
1013 | && ! cop_interlocks) | |
d8a1c247 KR |
1014 | || (mips_isa < 2 |
1015 | && (prev_pinfo & INSN_LOAD_MEMORY_DELAY)))) | |
8358c818 ILT |
1016 | { |
1017 | /* A load from a coprocessor or from memory. All load | |
1018 | delays delay the use of general register rt for one | |
1019 | instruction on the r3000. The r6000 and r4000 use | |
1020 | interlocks. */ | |
1aa6938e | 1021 | know (prev_pinfo & INSN_WRITE_GPR_T); |
0aa07269 ILT |
1022 | if (mips_optimize == 0 |
1023 | || insn_uses_reg (ip, | |
1024 | ((prev_insn.insn_opcode >> OP_SH_RT) | |
1025 | & OP_MASK_RT), | |
1026 | 0)) | |
becfe05e ILT |
1027 | ++nops; |
1028 | } | |
d8a1c247 | 1029 | else if (mips_isa < 4 |
5af96dce ILT |
1030 | && (((prev_pinfo & INSN_COPROC_MOVE_DELAY) |
1031 | && ! cop_interlocks) | |
d8a1c247 KR |
1032 | || (mips_isa < 2 |
1033 | && (prev_pinfo & INSN_COPROC_MEMORY_DELAY)))) | |
becfe05e ILT |
1034 | { |
1035 | /* A generic coprocessor delay. The previous instruction | |
1036 | modified a coprocessor general or control register. If | |
1037 | it modified a control register, we need to avoid any | |
1038 | coprocessor instruction (this is probably not always | |
1039 | required, but it sometimes is). If it modified a general | |
1040 | register, we avoid using that register. | |
1041 | ||
8358c818 ILT |
1042 | On the r6000 and r4000 loading a coprocessor register |
1043 | from memory is interlocked, and does not require a delay. | |
1044 | ||
becfe05e ILT |
1045 | This case is not handled very well. There is no special |
1046 | knowledge of CP0 handling, and the coprocessors other | |
1047 | than the floating point unit are not distinguished at | |
1048 | all. */ | |
1aa6938e | 1049 | if (prev_pinfo & INSN_WRITE_FPR_T) |
becfe05e | 1050 | { |
0aa07269 ILT |
1051 | if (mips_optimize == 0 |
1052 | || insn_uses_reg (ip, | |
8358c818 ILT |
1053 | ((prev_insn.insn_opcode >> OP_SH_FT) |
1054 | & OP_MASK_FT), | |
0aa07269 | 1055 | 1)) |
becfe05e ILT |
1056 | ++nops; |
1057 | } | |
1aa6938e | 1058 | else if (prev_pinfo & INSN_WRITE_FPR_S) |
becfe05e | 1059 | { |
0aa07269 ILT |
1060 | if (mips_optimize == 0 |
1061 | || insn_uses_reg (ip, | |
8358c818 ILT |
1062 | ((prev_insn.insn_opcode >> OP_SH_FS) |
1063 | & OP_MASK_FS), | |
0aa07269 | 1064 | 1)) |
becfe05e ILT |
1065 | ++nops; |
1066 | } | |
1067 | else | |
1068 | { | |
1069 | /* We don't know exactly what the previous instruction | |
1070 | does. If the current instruction uses a coprocessor | |
1071 | register, we must insert a NOP. If previous | |
1072 | instruction may set the condition codes, and the | |
1073 | current instruction uses them, we must insert two | |
1074 | NOPS. */ | |
0aa07269 | 1075 | if (mips_optimize == 0 |
1aa6938e ILT |
1076 | || ((prev_pinfo & INSN_WRITE_COND_CODE) |
1077 | && (pinfo & INSN_READ_COND_CODE))) | |
becfe05e | 1078 | nops += 2; |
1aa6938e | 1079 | else if (pinfo & INSN_COP) |
becfe05e ILT |
1080 | ++nops; |
1081 | } | |
1082 | } | |
d8a1c247 | 1083 | else if (mips_isa < 4 |
344a8d61 JSC |
1084 | && (prev_pinfo & INSN_WRITE_COND_CODE) |
1085 | && ! cop_interlocks) | |
becfe05e ILT |
1086 | { |
1087 | /* The previous instruction sets the coprocessor condition | |
1088 | codes, but does not require a general coprocessor delay | |
1089 | (this means it is a floating point comparison | |
1090 | instruction). If this instruction uses the condition | |
1091 | codes, we need to insert a single NOP. */ | |
0aa07269 | 1092 | if (mips_optimize == 0 |
1aa6938e | 1093 | || (pinfo & INSN_READ_COND_CODE)) |
becfe05e ILT |
1094 | ++nops; |
1095 | } | |
1aa6938e | 1096 | else if (prev_pinfo & INSN_READ_LO) |
becfe05e ILT |
1097 | { |
1098 | /* The previous instruction reads the LO register; if the | |
1099 | current instruction writes to the LO register, we must | |
344a8d61 JSC |
1100 | insert two NOPS. The R4650, VR4100 and VR4300 have |
1101 | interlocks. */ | |
e532b44c | 1102 | if (! interlocks |
b2b8c24e ILT |
1103 | && (mips_optimize == 0 |
1104 | || (pinfo & INSN_WRITE_LO))) | |
becfe05e ILT |
1105 | nops += 2; |
1106 | } | |
1107 | else if (prev_insn.insn_mo->pinfo & INSN_READ_HI) | |
1108 | { | |
1109 | /* The previous instruction reads the HI register; if the | |
1110 | current instruction writes to the HI register, we must | |
344a8d61 JSC |
1111 | insert a NOP. The R4650, VR4100 and VR4300 have |
1112 | interlocks. */ | |
e532b44c | 1113 | if (! interlocks |
b2b8c24e ILT |
1114 | && (mips_optimize == 0 |
1115 | || (pinfo & INSN_WRITE_HI))) | |
becfe05e ILT |
1116 | nops += 2; |
1117 | } | |
1118 | ||
1119 | /* There are two cases which require two intervening | |
1120 | instructions: 1) setting the condition codes using a move to | |
1121 | coprocessor instruction which requires a general coprocessor | |
1122 | delay and then reading the condition codes 2) reading the HI | |
b2b8c24e | 1123 | or LO register and then writing to it (except on the R4650, |
344a8d61 JSC |
1124 | VR4100, and VR4300 which have interlocks). If we are not |
1125 | already emitting a NOP instruction, we must check for these | |
1126 | cases compared to the instruction previous to the previous | |
c625fc23 | 1127 | instruction. */ |
becfe05e | 1128 | if (nops == 0 |
d8a1c247 KR |
1129 | && ((mips_isa < 4 |
1130 | && (prev_prev_insn.insn_mo->pinfo & INSN_COPROC_MOVE_DELAY) | |
becfe05e | 1131 | && (prev_prev_insn.insn_mo->pinfo & INSN_WRITE_COND_CODE) |
344a8d61 JSC |
1132 | && (pinfo & INSN_READ_COND_CODE) |
1133 | && ! cop_interlocks) | |
becfe05e | 1134 | || ((prev_prev_insn.insn_mo->pinfo & INSN_READ_LO) |
b2b8c24e | 1135 | && (pinfo & INSN_WRITE_LO) |
e532b44c | 1136 | && ! interlocks) |
becfe05e | 1137 | || ((prev_prev_insn.insn_mo->pinfo & INSN_READ_HI) |
b2b8c24e | 1138 | && (pinfo & INSN_WRITE_HI) |
e532b44c | 1139 | && ! interlocks))) |
becfe05e ILT |
1140 | ++nops; |
1141 | ||
0dd2d296 ILT |
1142 | /* If we are being given a nop instruction, don't bother with |
1143 | one of the nops we would otherwise output. This will only | |
1144 | happen when a nop instruction is used with mips_optimize set | |
1145 | to 0. */ | |
1146 | if (nops > 0 && ip->insn_opcode == 0) | |
1147 | --nops; | |
1148 | ||
becfe05e ILT |
1149 | /* Now emit the right number of NOP instructions. */ |
1150 | if (nops > 0) | |
1151 | { | |
5af96dce ILT |
1152 | fragS *old_frag; |
1153 | unsigned long old_frag_offset; | |
8c63448a ILT |
1154 | int i; |
1155 | ||
5af96dce ILT |
1156 | old_frag = frag_now; |
1157 | old_frag_offset = frag_now_fix (); | |
1158 | ||
8c63448a | 1159 | for (i = 0; i < nops; i++) |
becfe05e | 1160 | emit_nop (); |
5af96dce | 1161 | |
af255ca0 | 1162 | if (listing) |
546f5536 ILT |
1163 | { |
1164 | listing_prev_line (); | |
1165 | /* We may be at the start of a variant frag. In case we | |
1166 | are, make sure there is enough space for the frag | |
1167 | after the frags created by listing_prev_line. The | |
1168 | argument to frag_grow here must be at least as large | |
1169 | as the argument to all other calls to frag_grow in | |
1170 | this file. We don't have to worry about being in the | |
1171 | middle of a variant frag, because the variants insert | |
1172 | all needed nop instructions themselves. */ | |
1173 | frag_grow (40); | |
1174 | } | |
5af96dce | 1175 | |
becfe05e ILT |
1176 | if (insn_label != NULL) |
1177 | { | |
1178 | assert (S_GET_SEGMENT (insn_label) == now_seg); | |
1179 | insn_label->sy_frag = frag_now; | |
604633ae | 1180 | S_SET_VALUE (insn_label, (valueT) frag_now_fix ()); |
becfe05e | 1181 | } |
5af96dce ILT |
1182 | |
1183 | #ifndef NO_ECOFF_DEBUGGING | |
1184 | if (ECOFF_DEBUGGING) | |
1185 | ecoff_fix_loc (old_frag, old_frag_offset); | |
1186 | #endif | |
becfe05e ILT |
1187 | } |
1188 | } | |
1189 | ||
0dd2d296 ILT |
1190 | if (place == NULL) |
1191 | f = frag_more (4); | |
1192 | else | |
1193 | f = place; | |
becfe05e | 1194 | fixp = NULL; |
670a50eb ILT |
1195 | if (address_expr != NULL) |
1196 | { | |
5ac34ac3 | 1197 | if (address_expr->X_op == O_constant) |
670a50eb ILT |
1198 | { |
1199 | switch (reloc_type) | |
1200 | { | |
3d3c5039 | 1201 | case BFD_RELOC_32: |
670a50eb ILT |
1202 | ip->insn_opcode |= address_expr->X_add_number; |
1203 | break; | |
3d3c5039 ILT |
1204 | |
1205 | case BFD_RELOC_LO16: | |
670a50eb ILT |
1206 | ip->insn_opcode |= address_expr->X_add_number & 0xffff; |
1207 | break; | |
3d3c5039 ILT |
1208 | |
1209 | case BFD_RELOC_MIPS_JMP: | |
1210 | case BFD_RELOC_16_PCREL_S2: | |
670a50eb | 1211 | goto need_reloc; |
3d3c5039 ILT |
1212 | |
1213 | default: | |
670a50eb | 1214 | internalError (); |
3d3c5039 | 1215 | } |
670a50eb ILT |
1216 | } |
1217 | else | |
1218 | { | |
1219 | assert (reloc_type != BFD_RELOC_UNUSED); | |
3d3c5039 | 1220 | need_reloc: |
0dd2d296 ILT |
1221 | /* Don't generate a reloc if we are writing into a variant |
1222 | frag. */ | |
1223 | if (place == NULL) | |
867a58b3 ILT |
1224 | { |
1225 | fixp = fix_new_exp (frag_now, f - frag_now->fr_literal, 4, | |
1226 | address_expr, | |
1227 | reloc_type == BFD_RELOC_16_PCREL_S2, | |
1228 | reloc_type); | |
1229 | if (unmatched_hi) | |
1230 | { | |
1231 | struct mips_hi_fixup *hi_fixup; | |
1232 | ||
1233 | assert (reloc_type == BFD_RELOC_HI16_S); | |
1234 | hi_fixup = ((struct mips_hi_fixup *) | |
1235 | xmalloc (sizeof (struct mips_hi_fixup))); | |
1236 | hi_fixup->fixp = fixp; | |
1237 | hi_fixup->seg = now_seg; | |
1238 | hi_fixup->next = mips_hi_fixup_list; | |
1239 | mips_hi_fixup_list = hi_fixup; | |
1240 | } | |
1241 | } | |
3d3c5039 ILT |
1242 | } |
1243 | } | |
becfe05e | 1244 | |
670a50eb ILT |
1245 | md_number_to_chars (f, ip->insn_opcode, 4); |
1246 | ||
1aa6938e ILT |
1247 | /* Update the register mask information. */ |
1248 | if (pinfo & INSN_WRITE_GPR_D) | |
1249 | mips_gprmask |= 1 << ((ip->insn_opcode >> OP_SH_RD) & OP_MASK_RD); | |
1250 | if ((pinfo & (INSN_WRITE_GPR_T | INSN_READ_GPR_T)) != 0) | |
1251 | mips_gprmask |= 1 << ((ip->insn_opcode >> OP_SH_RT) & OP_MASK_RT); | |
1252 | if (pinfo & INSN_READ_GPR_S) | |
1253 | mips_gprmask |= 1 << ((ip->insn_opcode >> OP_SH_RS) & OP_MASK_RS); | |
1254 | if (pinfo & INSN_WRITE_GPR_31) | |
1255 | mips_gprmask |= 1 << 31; | |
1256 | if (pinfo & INSN_WRITE_FPR_D) | |
1257 | mips_cprmask[1] |= 1 << ((ip->insn_opcode >> OP_SH_FD) & OP_MASK_FD); | |
1258 | if ((pinfo & (INSN_WRITE_FPR_S | INSN_READ_FPR_S)) != 0) | |
1259 | mips_cprmask[1] |= 1 << ((ip->insn_opcode >> OP_SH_FS) & OP_MASK_FS); | |
1260 | if ((pinfo & (INSN_WRITE_FPR_T | INSN_READ_FPR_T)) != 0) | |
1261 | mips_cprmask[1] |= 1 << ((ip->insn_opcode >> OP_SH_FT) & OP_MASK_FT); | |
d8a1c247 KR |
1262 | if ((pinfo & INSN_READ_FPR_R) != 0) |
1263 | mips_cprmask[1] |= 1 << ((ip->insn_opcode >> OP_SH_FR) & OP_MASK_FR); | |
1aa6938e ILT |
1264 | if (pinfo & INSN_COP) |
1265 | { | |
1266 | /* We don't keep enough information to sort these cases out. */ | |
1267 | } | |
1268 | /* Never set the bit for $0, which is always zero. */ | |
1269 | mips_gprmask &=~ 1 << 0; | |
1270 | ||
0dd2d296 | 1271 | if (place == NULL && ! mips_noreorder) |
670a50eb | 1272 | { |
becfe05e ILT |
1273 | /* Filling the branch delay slot is more complex. We try to |
1274 | switch the branch with the previous instruction, which we can | |
1275 | do if the previous instruction does not set up a condition | |
1276 | that the branch tests and if the branch is not itself the | |
1277 | target of any branch. */ | |
1aa6938e ILT |
1278 | if ((pinfo & INSN_UNCOND_BRANCH_DELAY) |
1279 | || (pinfo & INSN_COND_BRANCH_DELAY)) | |
becfe05e | 1280 | { |
0aa07269 | 1281 | if (mips_optimize < 2 |
19ed8960 ILT |
1282 | /* If we have seen .set volatile or .set nomove, don't |
1283 | optimize. */ | |
1284 | || mips_nomove != 0 | |
4e95866e ILT |
1285 | /* If we had to emit any NOP instructions, then we |
1286 | already know we can not swap. */ | |
1287 | || nops != 0 | |
becfe05e ILT |
1288 | /* If we don't even know the previous insn, we can not |
1289 | swap. */ | |
1290 | || ! prev_insn_valid | |
1291 | /* If the previous insn is already in a branch delay | |
1292 | slot, then we can not swap. */ | |
1293 | || prev_insn_is_delay_slot | |
4e95866e ILT |
1294 | /* If the previous previous insn was in a .set |
1295 | noreorder, we can't swap. Actually, the MIPS | |
1296 | assembler will swap in this situation. However, gcc | |
1297 | configured -with-gnu-as will generate code like | |
1298 | .set noreorder | |
1299 | lw $4,XXX | |
1300 | .set reorder | |
1301 | INSN | |
1302 | bne $4,$0,foo | |
1303 | in which we can not swap the bne and INSN. If gcc is | |
1304 | not configured -with-gnu-as, it does not output the | |
1305 | .set pseudo-ops. We don't have to check | |
1306 | prev_insn_unreordered, because prev_insn_valid will | |
1307 | be 0 in that case. We don't want to use | |
1308 | prev_prev_insn_valid, because we do want to be able | |
1309 | to swap at the start of a function. */ | |
1310 | || prev_prev_insn_unreordered | |
becfe05e ILT |
1311 | /* If the branch is itself the target of a branch, we |
1312 | can not swap. We cheat on this; all we check for is | |
1313 | whether there is a label on this instruction. If | |
1314 | there are any branches to anything other than a | |
1315 | label, users must use .set noreorder. */ | |
1316 | || insn_label != NULL | |
777ad64d ILT |
1317 | /* If the previous instruction is in a variant frag, we |
1318 | can not do the swap. */ | |
1319 | || prev_insn_frag->fr_type == rs_machine_dependent | |
becfe05e ILT |
1320 | /* If the branch reads the condition codes, we don't |
1321 | even try to swap, because in the sequence | |
1322 | ctc1 $X,$31 | |
1323 | INSN | |
1324 | INSN | |
1325 | bc1t LABEL | |
1326 | we can not swap, and I don't feel like handling that | |
1327 | case. */ | |
d8a1c247 KR |
1328 | || (mips_isa < 4 |
1329 | && (pinfo & INSN_READ_COND_CODE)) | |
becfe05e ILT |
1330 | /* We can not swap with an instruction that requires a |
1331 | delay slot, becase the target of the branch might | |
1332 | interfere with that instruction. */ | |
d8a1c247 KR |
1333 | || (mips_isa < 4 |
1334 | && (prev_pinfo | |
1335 | & (INSN_LOAD_COPROC_DELAY | |
1336 | | INSN_COPROC_MOVE_DELAY | |
1337 | | INSN_WRITE_COND_CODE))) | |
e532b44c | 1338 | || (! interlocks |
b2b8c24e ILT |
1339 | && (prev_pinfo |
1340 | & (INSN_READ_LO | |
1341 | | INSN_READ_HI))) | |
8358c818 | 1342 | || (mips_isa < 2 |
1aa6938e | 1343 | && (prev_pinfo |
8358c818 ILT |
1344 | & (INSN_LOAD_MEMORY_DELAY |
1345 | | INSN_COPROC_MEMORY_DELAY))) | |
becfe05e | 1346 | /* We can not swap with a branch instruction. */ |
1aa6938e | 1347 | || (prev_pinfo |
6e8dda9c ILT |
1348 | & (INSN_UNCOND_BRANCH_DELAY |
1349 | | INSN_COND_BRANCH_DELAY | |
1350 | | INSN_COND_BRANCH_LIKELY)) | |
abdad6bc ILT |
1351 | /* We do not swap with a trap instruction, since it |
1352 | complicates trap handlers to have the trap | |
1353 | instruction be in a delay slot. */ | |
1aa6938e | 1354 | || (prev_pinfo & INSN_TRAP) |
becfe05e ILT |
1355 | /* If the branch reads a register that the previous |
1356 | instruction sets, we can not swap. */ | |
1aa6938e | 1357 | || ((prev_pinfo & INSN_WRITE_GPR_T) |
becfe05e ILT |
1358 | && insn_uses_reg (ip, |
1359 | ((prev_insn.insn_opcode >> OP_SH_RT) | |
1360 | & OP_MASK_RT), | |
1361 | 0)) | |
1aa6938e | 1362 | || ((prev_pinfo & INSN_WRITE_GPR_D) |
becfe05e ILT |
1363 | && insn_uses_reg (ip, |
1364 | ((prev_insn.insn_opcode >> OP_SH_RD) | |
1365 | & OP_MASK_RD), | |
1366 | 0)) | |
1849d646 ILT |
1367 | /* If the branch writes a register that the previous |
1368 | instruction sets, we can not swap (we know that | |
1369 | branches write only to RD or to $31). */ | |
1aa6938e ILT |
1370 | || ((prev_pinfo & INSN_WRITE_GPR_T) |
1371 | && (((pinfo & INSN_WRITE_GPR_D) | |
1849d646 ILT |
1372 | && (((prev_insn.insn_opcode >> OP_SH_RT) & OP_MASK_RT) |
1373 | == ((ip->insn_opcode >> OP_SH_RD) & OP_MASK_RD))) | |
1aa6938e | 1374 | || ((pinfo & INSN_WRITE_GPR_31) |
1849d646 ILT |
1375 | && (((prev_insn.insn_opcode >> OP_SH_RT) |
1376 | & OP_MASK_RT) | |
1377 | == 31)))) | |
1aa6938e ILT |
1378 | || ((prev_pinfo & INSN_WRITE_GPR_D) |
1379 | && (((pinfo & INSN_WRITE_GPR_D) | |
1849d646 ILT |
1380 | && (((prev_insn.insn_opcode >> OP_SH_RD) & OP_MASK_RD) |
1381 | == ((ip->insn_opcode >> OP_SH_RD) & OP_MASK_RD))) | |
1aa6938e | 1382 | || ((pinfo & INSN_WRITE_GPR_31) |
1849d646 ILT |
1383 | && (((prev_insn.insn_opcode >> OP_SH_RD) |
1384 | & OP_MASK_RD) | |
1385 | == 31)))) | |
becfe05e ILT |
1386 | /* If the branch writes a register that the previous |
1387 | instruction reads, we can not swap (we know that | |
1388 | branches only write to RD or to $31). */ | |
1aa6938e | 1389 | || ((pinfo & INSN_WRITE_GPR_D) |
becfe05e ILT |
1390 | && insn_uses_reg (&prev_insn, |
1391 | ((ip->insn_opcode >> OP_SH_RD) | |
1392 | & OP_MASK_RD), | |
1393 | 0)) | |
1aa6938e | 1394 | || ((pinfo & INSN_WRITE_GPR_31) |
becfe05e | 1395 | && insn_uses_reg (&prev_insn, 31, 0)) |
5b63f465 ILT |
1396 | /* If we are generating embedded PIC code, the branch |
1397 | might be expanded into a sequence which uses $at, so | |
1398 | we can't swap with an instruction which reads it. */ | |
1399 | || (mips_pic == EMBEDDED_PIC | |
1400 | && insn_uses_reg (&prev_insn, AT, 0)) | |
becfe05e ILT |
1401 | /* If the previous previous instruction has a load |
1402 | delay, and sets a register that the branch reads, we | |
1403 | can not swap. */ | |
d8a1c247 KR |
1404 | || (mips_isa < 4 |
1405 | && ((prev_prev_insn.insn_mo->pinfo & INSN_LOAD_COPROC_DELAY) | |
1406 | || (mips_isa < 2 | |
1407 | && (prev_prev_insn.insn_mo->pinfo | |
1408 | & INSN_LOAD_MEMORY_DELAY))) | |
becfe05e ILT |
1409 | && insn_uses_reg (ip, |
1410 | ((prev_prev_insn.insn_opcode >> OP_SH_RT) | |
1411 | & OP_MASK_RT), | |
1412 | 0))) | |
1413 | { | |
1414 | /* We could do even better for unconditional branches to | |
1415 | portions of this object file; we could pick up the | |
1416 | instruction at the destination, put it in the delay | |
1417 | slot, and bump the destination address. */ | |
1418 | emit_nop (); | |
1419 | /* Update the previous insn information. */ | |
1420 | prev_prev_insn = *ip; | |
1421 | prev_insn.insn_mo = &dummy_opcode; | |
1422 | } | |
1423 | else | |
1424 | { | |
1425 | char *prev_f; | |
1426 | char temp[4]; | |
1427 | ||
1428 | /* It looks like we can actually do the swap. */ | |
1429 | prev_f = prev_insn_frag->fr_literal + prev_insn_where; | |
1430 | memcpy (temp, prev_f, 4); | |
1431 | memcpy (prev_f, f, 4); | |
1432 | memcpy (f, temp, 4); | |
1433 | if (prev_insn_fixp) | |
1434 | { | |
1435 | prev_insn_fixp->fx_frag = frag_now; | |
1436 | prev_insn_fixp->fx_where = f - frag_now->fr_literal; | |
1437 | } | |
1438 | if (fixp) | |
1439 | { | |
1440 | fixp->fx_frag = prev_insn_frag; | |
1441 | fixp->fx_where = prev_insn_where; | |
1442 | } | |
1443 | /* Update the previous insn information; leave prev_insn | |
1444 | unchanged. */ | |
1445 | prev_prev_insn = *ip; | |
1446 | } | |
1447 | prev_insn_is_delay_slot = 1; | |
1448 | ||
1449 | /* If that was an unconditional branch, forget the previous | |
1450 | insn information. */ | |
1aa6938e | 1451 | if (pinfo & INSN_UNCOND_BRANCH_DELAY) |
becfe05e ILT |
1452 | { |
1453 | prev_prev_insn.insn_mo = &dummy_opcode; | |
1454 | prev_insn.insn_mo = &dummy_opcode; | |
1455 | } | |
1456 | } | |
1aa6938e | 1457 | else if (pinfo & INSN_COND_BRANCH_LIKELY) |
8358c818 ILT |
1458 | { |
1459 | /* We don't yet optimize a branch likely. What we should do | |
1460 | is look at the target, copy the instruction found there | |
1461 | into the delay slot, and increment the branch to jump to | |
1462 | the next instruction. */ | |
1463 | emit_nop (); | |
1464 | /* Update the previous insn information. */ | |
1465 | prev_prev_insn = *ip; | |
1466 | prev_insn.insn_mo = &dummy_opcode; | |
1467 | } | |
becfe05e | 1468 | else |
670a50eb | 1469 | { |
becfe05e ILT |
1470 | /* Update the previous insn information. */ |
1471 | if (nops > 0) | |
1472 | prev_prev_insn.insn_mo = &dummy_opcode; | |
1473 | else | |
1474 | prev_prev_insn = prev_insn; | |
1475 | prev_insn = *ip; | |
1476 | ||
1477 | /* Any time we see a branch, we always fill the delay slot | |
1478 | immediately; since this insn is not a branch, we know it | |
1479 | is not in a delay slot. */ | |
1480 | prev_insn_is_delay_slot = 0; | |
1481 | } | |
1482 | ||
4e95866e ILT |
1483 | prev_prev_insn_unreordered = prev_insn_unreordered; |
1484 | prev_insn_unreordered = 0; | |
becfe05e ILT |
1485 | prev_insn_frag = frag_now; |
1486 | prev_insn_where = f - frag_now->fr_literal; | |
1487 | prev_insn_fixp = fixp; | |
1488 | prev_insn_valid = 1; | |
1489 | } | |
3d3c5039 | 1490 | |
becfe05e ILT |
1491 | /* We just output an insn, so the next one doesn't have a label. */ |
1492 | insn_label = NULL; | |
1493 | } | |
1494 | ||
1495 | /* This function forgets that there was any previous instruction or | |
1496 | label. */ | |
1497 | ||
1498 | static void | |
1499 | mips_no_prev_insn () | |
1500 | { | |
1501 | prev_insn.insn_mo = &dummy_opcode; | |
1502 | prev_prev_insn.insn_mo = &dummy_opcode; | |
1503 | prev_insn_valid = 0; | |
1504 | prev_insn_is_delay_slot = 0; | |
4e95866e ILT |
1505 | prev_insn_unreordered = 0; |
1506 | prev_prev_insn_unreordered = 0; | |
becfe05e ILT |
1507 | insn_label = NULL; |
1508 | } | |
1509 | ||
1510 | /* This function must be called whenever we turn on noreorder or emit | |
1511 | something other than instructions. It inserts any NOPS which might | |
1512 | be needed by the previous instruction, and clears the information | |
1513 | kept for the previous instructions. */ | |
1514 | ||
1515 | static void | |
1516 | mips_emit_delays () | |
1517 | { | |
1518 | if (! mips_noreorder) | |
1519 | { | |
1520 | int nop; | |
1521 | ||
1522 | nop = 0; | |
d8a1c247 | 1523 | if ((mips_isa < 4 |
344a8d61 JSC |
1524 | && (! cop_interlocks |
1525 | && (prev_insn.insn_mo->pinfo | |
1526 | & (INSN_LOAD_COPROC_DELAY | |
1527 | | INSN_COPROC_MOVE_DELAY | |
1528 | | INSN_WRITE_COND_CODE)))) | |
e532b44c | 1529 | || (! interlocks |
b2b8c24e ILT |
1530 | && (prev_insn.insn_mo->pinfo |
1531 | & (INSN_READ_LO | |
1532 | | INSN_READ_HI))) | |
8358c818 ILT |
1533 | || (mips_isa < 2 |
1534 | && (prev_insn.insn_mo->pinfo | |
1535 | & (INSN_LOAD_MEMORY_DELAY | |
1536 | | INSN_COPROC_MEMORY_DELAY)))) | |
becfe05e ILT |
1537 | { |
1538 | nop = 1; | |
d8a1c247 | 1539 | if ((mips_isa < 4 |
344a8d61 JSC |
1540 | && (! cop_interlocks |
1541 | && prev_insn.insn_mo->pinfo & INSN_WRITE_COND_CODE)) | |
e532b44c | 1542 | || (! interlocks |
b2b8c24e ILT |
1543 | && ((prev_insn.insn_mo->pinfo & INSN_READ_HI) |
1544 | || (prev_insn.insn_mo->pinfo & INSN_READ_LO)))) | |
becfe05e ILT |
1545 | emit_nop (); |
1546 | } | |
d8a1c247 | 1547 | else if ((mips_isa < 4 |
344a8d61 JSC |
1548 | && (! cop_interlocks |
1549 | && prev_prev_insn.insn_mo->pinfo & INSN_WRITE_COND_CODE)) | |
e532b44c | 1550 | || (! interlocks |
b2b8c24e ILT |
1551 | && ((prev_prev_insn.insn_mo->pinfo & INSN_READ_HI) |
1552 | || (prev_prev_insn.insn_mo->pinfo & INSN_READ_LO)))) | |
becfe05e ILT |
1553 | nop = 1; |
1554 | if (nop) | |
670a50eb | 1555 | { |
becfe05e ILT |
1556 | emit_nop (); |
1557 | if (insn_label != NULL) | |
1558 | { | |
1559 | assert (S_GET_SEGMENT (insn_label) == now_seg); | |
1560 | insn_label->sy_frag = frag_now; | |
604633ae | 1561 | S_SET_VALUE (insn_label, (valueT) frag_now_fix ()); |
becfe05e | 1562 | } |
3d3c5039 ILT |
1563 | } |
1564 | } | |
0221ddf7 ILT |
1565 | |
1566 | mips_no_prev_insn (); | |
3d3c5039 ILT |
1567 | } |
1568 | ||
670a50eb ILT |
1569 | /* Build an instruction created by a macro expansion. This is passed |
1570 | a pointer to the count of instructions created so far, an | |
1571 | expression, the name of the instruction to build, an operand format | |
1572 | string, and corresponding arguments. */ | |
1573 | ||
1dc1e798 | 1574 | #ifdef USE_STDARG |
3d3c5039 | 1575 | static void |
0dd2d296 ILT |
1576 | macro_build (char *place, |
1577 | int *counter, | |
670a50eb | 1578 | expressionS * ep, |
3d3c5039 ILT |
1579 | const char *name, |
1580 | const char *fmt, | |
1581 | ...) | |
1dc1e798 | 1582 | #else |
3d3c5039 | 1583 | static void |
0dd2d296 ILT |
1584 | macro_build (place, counter, ep, name, fmt, va_alist) |
1585 | char *place; | |
3d3c5039 ILT |
1586 | int *counter; |
1587 | expressionS *ep; | |
1588 | const char *name; | |
1589 | const char *fmt; | |
1590 | va_dcl | |
1dc1e798 | 1591 | #endif |
3d3c5039 | 1592 | { |
670a50eb ILT |
1593 | struct mips_cl_insn insn; |
1594 | bfd_reloc_code_real_type r; | |
1595 | va_list args; | |
3d3c5039 | 1596 | |
1dc1e798 | 1597 | #ifdef USE_STDARG |
670a50eb | 1598 | va_start (args, fmt); |
3d3c5039 | 1599 | #else |
670a50eb | 1600 | va_start (args); |
3d3c5039 ILT |
1601 | #endif |
1602 | ||
670a50eb ILT |
1603 | /* |
1604 | * If the macro is about to expand into a second instruction, | |
1605 | * print a warning if needed. We need to pass ip as a parameter | |
1606 | * to generate a better warning message here... | |
1607 | */ | |
0dd2d296 | 1608 | if (mips_warn_about_macros && place == NULL && *counter == 1) |
670a50eb ILT |
1609 | as_warn ("Macro instruction expanded into multiple instructions"); |
1610 | ||
0dd2d296 ILT |
1611 | if (place == NULL) |
1612 | *counter += 1; /* bump instruction counter */ | |
670a50eb ILT |
1613 | |
1614 | r = BFD_RELOC_UNUSED; | |
1615 | insn.insn_mo = (struct mips_opcode *) hash_find (op_hash, name); | |
1616 | assert (insn.insn_mo); | |
1617 | assert (strcmp (name, insn.insn_mo->name) == 0); | |
1618 | ||
9226253a | 1619 | while (strcmp (fmt, insn.insn_mo->args) != 0 |
c625fc23 JSC |
1620 | || insn.insn_mo->pinfo == INSN_MACRO |
1621 | || ((insn.insn_mo->pinfo & INSN_ISA) == INSN_ISA2 | |
1622 | && mips_isa < 2) | |
1623 | || ((insn.insn_mo->pinfo & INSN_ISA) == INSN_ISA3 | |
1624 | && mips_isa < 3) | |
1625 | || ((insn.insn_mo->pinfo & INSN_ISA) == INSN_ISA4 | |
1626 | && mips_isa < 4) | |
1627 | || ((insn.insn_mo->pinfo & INSN_ISA) == INSN_4650 | |
1628 | && ! mips_4650) | |
1629 | || ((insn.insn_mo->pinfo & INSN_ISA) == INSN_4010 | |
1630 | && ! mips_4010) | |
1631 | || ((insn.insn_mo->pinfo & INSN_ISA) == INSN_4100 | |
1632 | && ! mips_4100)) | |
670a50eb ILT |
1633 | { |
1634 | ++insn.insn_mo; | |
1635 | assert (insn.insn_mo->name); | |
1636 | assert (strcmp (name, insn.insn_mo->name) == 0); | |
3d3c5039 | 1637 | } |
670a50eb ILT |
1638 | insn.insn_opcode = insn.insn_mo->match; |
1639 | for (;;) | |
1640 | { | |
1641 | switch (*fmt++) | |
1642 | { | |
3d3c5039 | 1643 | case '\0': |
670a50eb | 1644 | break; |
3d3c5039 ILT |
1645 | |
1646 | case ',': | |
1647 | case '(': | |
1648 | case ')': | |
670a50eb | 1649 | continue; |
3d3c5039 ILT |
1650 | |
1651 | case 't': | |
1652 | case 'w': | |
918692a5 | 1653 | case 'E': |
670a50eb ILT |
1654 | insn.insn_opcode |= va_arg (args, int) << 16; |
1655 | continue; | |
3d3c5039 ILT |
1656 | |
1657 | case 'c': | |
1658 | case 'T': | |
1659 | case 'W': | |
670a50eb ILT |
1660 | insn.insn_opcode |= va_arg (args, int) << 16; |
1661 | continue; | |
3d3c5039 ILT |
1662 | |
1663 | case 'd': | |
918692a5 | 1664 | case 'G': |
670a50eb ILT |
1665 | insn.insn_opcode |= va_arg (args, int) << 11; |
1666 | continue; | |
3d3c5039 ILT |
1667 | |
1668 | case 'V': | |
1669 | case 'S': | |
670a50eb ILT |
1670 | insn.insn_opcode |= va_arg (args, int) << 11; |
1671 | continue; | |
3d3c5039 | 1672 | |
ff3a5c18 ILT |
1673 | case 'z': |
1674 | continue; | |
1675 | ||
3d3c5039 | 1676 | case '<': |
670a50eb ILT |
1677 | insn.insn_opcode |= va_arg (args, int) << 6; |
1678 | continue; | |
3d3c5039 ILT |
1679 | |
1680 | case 'D': | |
670a50eb ILT |
1681 | insn.insn_opcode |= va_arg (args, int) << 6; |
1682 | continue; | |
3d3c5039 | 1683 | |
918692a5 ILT |
1684 | case 'B': |
1685 | insn.insn_opcode |= va_arg (args, int) << 6; | |
1686 | continue; | |
1687 | ||
3d3c5039 ILT |
1688 | case 'b': |
1689 | case 's': | |
1690 | case 'r': | |
1691 | case 'v': | |
670a50eb ILT |
1692 | insn.insn_opcode |= va_arg (args, int) << 21; |
1693 | continue; | |
3d3c5039 ILT |
1694 | |
1695 | case 'i': | |
1696 | case 'j': | |
1697 | case 'o': | |
9226253a | 1698 | r = (bfd_reloc_code_real_type) va_arg (args, int); |
0dd2d296 ILT |
1699 | assert (r == BFD_RELOC_MIPS_GPREL |
1700 | || r == BFD_RELOC_MIPS_LITERAL | |
1701 | || r == BFD_RELOC_LO16 | |
1702 | || r == BFD_RELOC_MIPS_GOT16 | |
ecd4ca1c | 1703 | || r == BFD_RELOC_MIPS_CALL16 |
fb251650 ILT |
1704 | || r == BFD_RELOC_MIPS_GOT_LO16 |
1705 | || r == BFD_RELOC_MIPS_CALL_LO16 | |
ecd4ca1c ILT |
1706 | || (ep->X_op == O_subtract |
1707 | && now_seg == text_section | |
ecd4ca1c | 1708 | && r == BFD_RELOC_PCREL_LO16)); |
670a50eb | 1709 | continue; |
3d3c5039 | 1710 | |
6e8dda9c | 1711 | case 'u': |
ecd4ca1c ILT |
1712 | r = (bfd_reloc_code_real_type) va_arg (args, int); |
1713 | assert (ep != NULL | |
1714 | && (ep->X_op == O_constant | |
1715 | || (ep->X_op == O_symbol | |
1716 | && (r == BFD_RELOC_HI16_S | |
fb251650 ILT |
1717 | || r == BFD_RELOC_HI16 |
1718 | || r == BFD_RELOC_MIPS_GOT_HI16 | |
1719 | || r == BFD_RELOC_MIPS_CALL_HI16)) | |
ecd4ca1c ILT |
1720 | || (ep->X_op == O_subtract |
1721 | && now_seg == text_section | |
ecd4ca1c ILT |
1722 | && r == BFD_RELOC_PCREL_HI16_S))); |
1723 | if (ep->X_op == O_constant) | |
1724 | { | |
1725 | insn.insn_opcode |= (ep->X_add_number >> 16) & 0xffff; | |
1726 | ep = NULL; | |
1727 | r = BFD_RELOC_UNUSED; | |
1728 | } | |
6e8dda9c ILT |
1729 | continue; |
1730 | ||
3d3c5039 | 1731 | case 'p': |
670a50eb ILT |
1732 | assert (ep != NULL); |
1733 | /* | |
1734 | * This allows macro() to pass an immediate expression for | |
1735 | * creating short branches without creating a symbol. | |
1736 | * Note that the expression still might come from the assembly | |
1737 | * input, in which case the value is not checked for range nor | |
1738 | * is a relocation entry generated (yuck). | |
1739 | */ | |
5ac34ac3 | 1740 | if (ep->X_op == O_constant) |
670a50eb ILT |
1741 | { |
1742 | insn.insn_opcode |= (ep->X_add_number >> 2) & 0xffff; | |
1743 | ep = NULL; | |
1744 | } | |
1745 | else | |
1746 | r = BFD_RELOC_16_PCREL_S2; | |
1747 | continue; | |
3d3c5039 | 1748 | |
9226253a ILT |
1749 | case 'a': |
1750 | assert (ep != NULL); | |
1751 | r = BFD_RELOC_MIPS_JMP; | |
1752 | continue; | |
1753 | ||
3d3c5039 | 1754 | default: |
670a50eb | 1755 | internalError (); |
3d3c5039 | 1756 | } |
670a50eb | 1757 | break; |
3d3c5039 | 1758 | } |
670a50eb ILT |
1759 | va_end (args); |
1760 | assert (r == BFD_RELOC_UNUSED ? ep == NULL : ep != NULL); | |
1761 | ||
867a58b3 | 1762 | append_insn (place, &insn, ep, r, false); |
3d3c5039 ILT |
1763 | } |
1764 | ||
1765 | /* | |
1766 | * Generate a "lui" instruction. | |
1767 | */ | |
1768 | static void | |
0dd2d296 ILT |
1769 | macro_build_lui (place, counter, ep, regnum) |
1770 | char *place; | |
3d3c5039 ILT |
1771 | int *counter; |
1772 | expressionS *ep; | |
1773 | int regnum; | |
1774 | { | |
670a50eb ILT |
1775 | expressionS high_expr; |
1776 | struct mips_cl_insn insn; | |
1777 | bfd_reloc_code_real_type r; | |
1778 | CONST char *name = "lui"; | |
1779 | CONST char *fmt = "t,u"; | |
1780 | ||
0dd2d296 ILT |
1781 | if (place == NULL) |
1782 | high_expr = *ep; | |
1783 | else | |
1784 | { | |
1785 | high_expr.X_op = O_constant; | |
fb251650 | 1786 | high_expr.X_add_number = ep->X_add_number; |
0dd2d296 | 1787 | } |
670a50eb | 1788 | |
5ac34ac3 | 1789 | if (high_expr.X_op == O_constant) |
670a50eb ILT |
1790 | { |
1791 | /* we can compute the instruction now without a relocation entry */ | |
1792 | if (high_expr.X_add_number & 0x8000) | |
1793 | high_expr.X_add_number += 0x10000; | |
1794 | high_expr.X_add_number = | |
1795 | ((unsigned long) high_expr.X_add_number >> 16) & 0xffff; | |
1796 | r = BFD_RELOC_UNUSED; | |
1797 | } | |
1798 | else | |
0dd2d296 ILT |
1799 | { |
1800 | assert (ep->X_op == O_symbol); | |
1801 | /* _gp_disp is a special case, used from s_cpload. */ | |
d9aba805 | 1802 | assert (mips_pic == NO_PIC |
0dd2d296 ILT |
1803 | || strcmp (S_GET_NAME (ep->X_add_symbol), "_gp_disp") == 0); |
1804 | r = BFD_RELOC_HI16_S; | |
1805 | } | |
670a50eb ILT |
1806 | |
1807 | /* | |
1808 | * If the macro is about to expand into a second instruction, | |
1809 | * print a warning if needed. We need to pass ip as a parameter | |
1810 | * to generate a better warning message here... | |
1811 | */ | |
0dd2d296 | 1812 | if (mips_warn_about_macros && place == NULL && *counter == 1) |
670a50eb ILT |
1813 | as_warn ("Macro instruction expanded into multiple instructions"); |
1814 | ||
0dd2d296 ILT |
1815 | if (place == NULL) |
1816 | *counter += 1; /* bump instruction counter */ | |
670a50eb ILT |
1817 | |
1818 | insn.insn_mo = (struct mips_opcode *) hash_find (op_hash, name); | |
1819 | assert (insn.insn_mo); | |
1820 | assert (strcmp (name, insn.insn_mo->name) == 0); | |
1821 | assert (strcmp (fmt, insn.insn_mo->args) == 0); | |
1822 | ||
0dd2d296 | 1823 | insn.insn_opcode = insn.insn_mo->match | (regnum << OP_SH_RT); |
670a50eb ILT |
1824 | if (r == BFD_RELOC_UNUSED) |
1825 | { | |
1826 | insn.insn_opcode |= high_expr.X_add_number; | |
867a58b3 | 1827 | append_insn (place, &insn, NULL, r, false); |
670a50eb ILT |
1828 | } |
1829 | else | |
867a58b3 | 1830 | append_insn (place, &insn, &high_expr, r, false); |
3d3c5039 ILT |
1831 | } |
1832 | ||
1833 | /* set_at() | |
1834 | * Generates code to set the $at register to true (one) | |
1835 | * if reg is less than the immediate expression. | |
1836 | */ | |
1837 | static void | |
6e8dda9c | 1838 | set_at (counter, reg, unsignedp) |
3d3c5039 ILT |
1839 | int *counter; |
1840 | int reg; | |
6e8dda9c | 1841 | int unsignedp; |
3d3c5039 | 1842 | { |
6e8dda9c | 1843 | if (imm_expr.X_add_number >= -0x8000 && imm_expr.X_add_number < 0x8000) |
0dd2d296 | 1844 | macro_build ((char *) NULL, counter, &imm_expr, |
6e8dda9c | 1845 | unsignedp ? "sltiu" : "slti", |
9226253a | 1846 | "t,r,j", AT, reg, (int) BFD_RELOC_LO16); |
6e8dda9c | 1847 | else |
670a50eb | 1848 | { |
d8a1c247 | 1849 | load_register (counter, AT, &imm_expr, 0); |
0dd2d296 | 1850 | macro_build ((char *) NULL, counter, NULL, |
6e8dda9c ILT |
1851 | unsignedp ? "sltu" : "slt", |
1852 | "d,v,t", AT, reg, AT); | |
670a50eb | 1853 | } |
3d3c5039 ILT |
1854 | } |
1855 | ||
6e8dda9c | 1856 | /* Warn if an expression is not a constant. */ |
3d3c5039 ILT |
1857 | |
1858 | static void | |
19ed8960 | 1859 | check_absolute_expr (ip, ex) |
3d3c5039 | 1860 | struct mips_cl_insn *ip; |
19ed8960 | 1861 | expressionS *ex; |
3d3c5039 | 1862 | { |
19ed8960 | 1863 | if (ex->X_op != O_constant) |
670a50eb | 1864 | as_warn ("Instruction %s requires absolute expression", ip->insn_mo->name); |
3d3c5039 ILT |
1865 | } |
1866 | ||
1867 | /* load_register() | |
1868 | * This routine generates the least number of instructions neccessary to load | |
1869 | * an absolute expression value into a register. | |
1870 | */ | |
1871 | static void | |
d8a1c247 | 1872 | load_register (counter, reg, ep, dbl) |
670a50eb | 1873 | int *counter; |
670a50eb ILT |
1874 | int reg; |
1875 | expressionS *ep; | |
d8a1c247 | 1876 | int dbl; |
3d3c5039 | 1877 | { |
d8a1c247 | 1878 | int shift, freg; |
7811254c | 1879 | expressionS hi32, lo32, tmp; |
847a01cd ILT |
1880 | |
1881 | if (ep->X_op != O_big) | |
6e8dda9c | 1882 | { |
847a01cd | 1883 | assert (ep->X_op == O_constant); |
d8a1c247 KR |
1884 | if (ep->X_add_number < 0x8000 |
1885 | && (ep->X_add_number >= 0 | |
1886 | || (ep->X_add_number >= -0x8000 | |
1887 | && (! dbl | |
1888 | || ! ep->X_unsigned | |
1889 | || sizeof (ep->X_add_number) > 4)))) | |
847a01cd ILT |
1890 | { |
1891 | /* We can handle 16 bit signed values with an addiu to | |
1892 | $zero. No need to ever use daddiu here, since $zero and | |
1893 | the result are always correct in 32 bit mode. */ | |
1894 | macro_build ((char *) NULL, counter, ep, "addiu", "t,r,j", reg, 0, | |
1895 | (int) BFD_RELOC_LO16); | |
1896 | return; | |
1897 | } | |
1898 | else if (ep->X_add_number >= 0 && ep->X_add_number < 0x10000) | |
1899 | { | |
1900 | /* We can handle 16 bit unsigned values with an ori to | |
1901 | $zero. */ | |
1902 | macro_build ((char *) NULL, counter, ep, "ori", "t,r,i", reg, 0, | |
1903 | (int) BFD_RELOC_LO16); | |
1904 | return; | |
1905 | } | |
98bfd087 ILT |
1906 | else if ((((ep->X_add_number &~ (offsetT) 0x7fffffff) == 0 |
1907 | || ((ep->X_add_number &~ (offsetT) 0x7fffffff) | |
1908 | == ~ (offsetT) 0x7fffffff)) | |
1909 | && (! dbl | |
1910 | || ! ep->X_unsigned | |
1911 | || sizeof (ep->X_add_number) > 4 | |
1912 | || (ep->X_add_number & 0x80000000) == 0)) | |
1913 | || (mips_isa < 3 | |
1914 | && (ep->X_add_number &~ 0xffffffff) == 0)) | |
847a01cd ILT |
1915 | { |
1916 | /* 32 bit values require an lui. */ | |
1917 | macro_build ((char *) NULL, counter, ep, "lui", "t,u", reg, | |
1918 | (int) BFD_RELOC_HI16); | |
1919 | if ((ep->X_add_number & 0xffff) != 0) | |
1920 | macro_build ((char *) NULL, counter, ep, "ori", "t,r,i", reg, reg, | |
1921 | (int) BFD_RELOC_LO16); | |
1922 | return; | |
1923 | } | |
7811254c ILT |
1924 | else |
1925 | { | |
1926 | /* 32 bit value with high bit set being loaded into a 64 bit | |
1927 | register. We can't use lui, because that would | |
1928 | incorrectly set the 32 high bits. */ | |
1929 | generic_bignum[3] = 0; | |
1930 | generic_bignum[2] = 0; | |
1931 | generic_bignum[1] = (ep->X_add_number >> 16) & 0xffff; | |
1932 | generic_bignum[0] = ep->X_add_number & 0xffff; | |
1933 | tmp.X_op = O_big; | |
1934 | tmp.X_add_number = 4; | |
1935 | ep = &tmp; | |
1936 | } | |
6e8dda9c | 1937 | } |
847a01cd ILT |
1938 | |
1939 | /* The value is larger than 32 bits. */ | |
1940 | ||
1941 | if (mips_isa < 3) | |
670a50eb | 1942 | { |
6e8dda9c | 1943 | as_bad ("Number larger than 32 bits"); |
0dd2d296 | 1944 | macro_build ((char *) NULL, counter, ep, "addiu", "t,r,j", reg, 0, |
9226253a | 1945 | (int) BFD_RELOC_LO16); |
847a01cd | 1946 | return; |
6e8dda9c | 1947 | } |
6e8dda9c | 1948 | |
847a01cd ILT |
1949 | if (ep->X_op != O_big) |
1950 | { | |
6e8dda9c ILT |
1951 | hi32 = *ep; |
1952 | shift = 32; | |
1953 | hi32.X_add_number >>= shift; | |
1954 | hi32.X_add_number &= 0xffffffff; | |
1955 | if ((hi32.X_add_number & 0x80000000) != 0) | |
1956 | hi32.X_add_number |= ~ (offsetT) 0xffffffff; | |
6e8dda9c ILT |
1957 | lo32 = *ep; |
1958 | lo32.X_add_number &= 0xffffffff; | |
670a50eb | 1959 | } |
847a01cd ILT |
1960 | else |
1961 | { | |
1962 | assert (ep->X_add_number > 2); | |
1963 | if (ep->X_add_number == 3) | |
1964 | generic_bignum[3] = 0; | |
1965 | else if (ep->X_add_number > 4) | |
1966 | as_bad ("Number larger than 64 bits"); | |
1967 | lo32.X_op = O_constant; | |
1968 | lo32.X_add_number = generic_bignum[0] + (generic_bignum[1] << 16); | |
1969 | hi32.X_op = O_constant; | |
1970 | hi32.X_add_number = generic_bignum[2] + (generic_bignum[3] << 16); | |
1971 | } | |
1972 | ||
d8a1c247 KR |
1973 | if (hi32.X_add_number == 0) |
1974 | freg = 0; | |
1975 | else | |
1976 | { | |
fb251650 ILT |
1977 | if (hi32.X_add_number == 0xffffffff) |
1978 | { | |
1979 | if ((lo32.X_add_number & 0xffff8000) == 0xffff8000) | |
1980 | { | |
1981 | macro_build ((char *) NULL, counter, &lo32, "addiu", "t,r,j", reg, 0, | |
1982 | (int) BFD_RELOC_LO16); | |
1983 | return; | |
1984 | } | |
1985 | if (lo32.X_add_number & 0x80000000) | |
1986 | { | |
1987 | macro_build ((char *) NULL, counter, &lo32, "lui", "t,u", reg, | |
1988 | (int) BFD_RELOC_HI16); | |
1989 | macro_build ((char *) NULL, counter, &lo32, "ori", "t,r,i", reg, reg, | |
1990 | (int) BFD_RELOC_LO16); | |
1991 | return; | |
1992 | } | |
1993 | } | |
d8a1c247 KR |
1994 | load_register (counter, reg, &hi32, 0); |
1995 | freg = reg; | |
1996 | } | |
847a01cd | 1997 | if ((lo32.X_add_number & 0xffff0000) == 0) |
d8a1c247 KR |
1998 | { |
1999 | if (freg != 0) | |
2000 | { | |
2001 | macro_build ((char *) NULL, counter, NULL, "dsll32", "d,w,<", reg, | |
2002 | freg, 0); | |
2003 | freg = reg; | |
2004 | } | |
2005 | } | |
847a01cd ILT |
2006 | else |
2007 | { | |
2008 | expressionS mid16; | |
2009 | ||
fb251650 ILT |
2010 | if ((freg == 0) && (lo32.X_add_number == 0xffffffff)) |
2011 | { | |
2012 | macro_build ((char *) NULL, counter, &lo32, "lui", "t,u", reg, | |
2013 | (int) BFD_RELOC_HI16); | |
2014 | macro_build ((char *) NULL, counter, NULL, "dsrl32", "d,w,<", reg, | |
2015 | reg, 32); | |
2016 | return; | |
2017 | } | |
2018 | ||
d8a1c247 KR |
2019 | if (freg != 0) |
2020 | { | |
2021 | macro_build ((char *) NULL, counter, NULL, "dsll", "d,w,<", reg, | |
2022 | freg, 16); | |
2023 | freg = reg; | |
2024 | } | |
847a01cd ILT |
2025 | mid16 = lo32; |
2026 | mid16.X_add_number >>= 16; | |
2027 | macro_build ((char *) NULL, counter, &mid16, "ori", "t,r,i", reg, | |
d8a1c247 | 2028 | freg, (int) BFD_RELOC_LO16); |
847a01cd ILT |
2029 | macro_build ((char *) NULL, counter, NULL, "dsll", "d,w,<", reg, |
2030 | reg, 16); | |
d8a1c247 | 2031 | freg = reg; |
847a01cd ILT |
2032 | } |
2033 | if ((lo32.X_add_number & 0xffff) != 0) | |
d8a1c247 | 2034 | macro_build ((char *) NULL, counter, &lo32, "ori", "t,r,i", reg, freg, |
847a01cd | 2035 | (int) BFD_RELOC_LO16); |
3d3c5039 ILT |
2036 | } |
2037 | ||
0dd2d296 ILT |
2038 | /* Load an address into a register. */ |
2039 | ||
2040 | static void | |
2041 | load_address (counter, reg, ep) | |
2042 | int *counter; | |
2043 | int reg; | |
2044 | expressionS *ep; | |
2045 | { | |
2046 | char *p; | |
2047 | ||
2048 | if (ep->X_op != O_constant | |
2049 | && ep->X_op != O_symbol) | |
2050 | { | |
2051 | as_bad ("expression too complex"); | |
2052 | ep->X_op = O_constant; | |
2053 | } | |
2054 | ||
2055 | if (ep->X_op == O_constant) | |
d9aba805 | 2056 | { |
d8a1c247 | 2057 | load_register (counter, reg, ep, 0); |
d9aba805 ILT |
2058 | return; |
2059 | } | |
2060 | ||
2061 | if (mips_pic == NO_PIC) | |
0dd2d296 ILT |
2062 | { |
2063 | /* If this is a reference to a GP relative symbol, we want | |
2064 | addiu $reg,$gp,<sym> (BFD_RELOC_MIPS_GPREL) | |
2065 | Otherwise we want | |
04cb3372 | 2066 | lui $reg,<sym> (BFD_RELOC_HI16_S) |
0dd2d296 ILT |
2067 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) |
2068 | If we have an addend, we always use the latter form. */ | |
7a15a226 ILT |
2069 | if ((valueT) ep->X_add_number >= MAX_GPREL_OFFSET |
2070 | || nopic_need_relax (ep->X_add_symbol)) | |
0dd2d296 ILT |
2071 | p = NULL; |
2072 | else | |
2073 | { | |
8ea7f4e8 | 2074 | frag_grow (20); |
0dd2d296 ILT |
2075 | macro_build ((char *) NULL, counter, ep, |
2076 | mips_isa < 3 ? "addiu" : "daddiu", | |
2077 | "t,r,j", reg, GP, (int) BFD_RELOC_MIPS_GPREL); | |
2078 | p = frag_var (rs_machine_dependent, 8, 0, | |
847a01cd | 2079 | RELAX_ENCODE (4, 8, 0, 4, 0, mips_warn_about_macros), |
0dd2d296 ILT |
2080 | ep->X_add_symbol, (long) 0, (char *) NULL); |
2081 | } | |
2082 | macro_build_lui (p, counter, ep, reg); | |
2083 | if (p != NULL) | |
2084 | p += 4; | |
2085 | macro_build (p, counter, ep, | |
2086 | mips_isa < 3 ? "addiu" : "daddiu", | |
2087 | "t,r,j", reg, reg, (int) BFD_RELOC_LO16); | |
2088 | } | |
fb251650 | 2089 | else if (mips_pic == SVR4_PIC && ! mips_big_got) |
0dd2d296 ILT |
2090 | { |
2091 | expressionS ex; | |
2092 | ||
2093 | /* If this is a reference to an external symbol, we want | |
2094 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
2095 | Otherwise we want | |
2096 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
2097 | nop | |
2098 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) | |
d9aba805 | 2099 | If there is a constant, it must be added in after. */ |
0dd2d296 ILT |
2100 | ex.X_add_number = ep->X_add_number; |
2101 | ep->X_add_number = 0; | |
8ea7f4e8 | 2102 | frag_grow (20); |
0dd2d296 ILT |
2103 | macro_build ((char *) NULL, counter, ep, |
2104 | mips_isa < 3 ? "lw" : "ld", | |
2105 | "t,o(b)", reg, (int) BFD_RELOC_MIPS_GOT16, GP); | |
2106 | macro_build ((char *) NULL, counter, (expressionS *) NULL, "nop", ""); | |
2107 | p = frag_var (rs_machine_dependent, 4, 0, | |
2108 | RELAX_ENCODE (0, 4, -8, 0, 0, mips_warn_about_macros), | |
2109 | ep->X_add_symbol, (long) 0, (char *) NULL); | |
2110 | macro_build (p, counter, ep, | |
2111 | mips_isa < 3 ? "addiu" : "daddiu", | |
2112 | "t,r,j", reg, reg, (int) BFD_RELOC_LO16); | |
2113 | if (ex.X_add_number != 0) | |
2114 | { | |
2115 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) | |
2116 | as_bad ("PIC code offset overflow (max 16 signed bits)"); | |
2117 | ex.X_op = O_constant; | |
fb251650 ILT |
2118 | macro_build ((char *) NULL, counter, &ex, |
2119 | mips_isa < 3 ? "addiu" : "daddiu", | |
2120 | "t,r,j", reg, reg, (int) BFD_RELOC_LO16); | |
2121 | } | |
2122 | } | |
2123 | else if (mips_pic == SVR4_PIC) | |
2124 | { | |
2125 | expressionS ex; | |
2126 | int off; | |
2127 | ||
2128 | /* This is the large GOT case. If this is a reference to an | |
2129 | external symbol, we want | |
2130 | lui $reg,<sym> (BFD_RELOC_MIPS_GOT_HI16) | |
2131 | addu $reg,$reg,$gp | |
2132 | lw $reg,<sym>($reg) (BFD_RELOC_MIPS_GOT_LO16) | |
2133 | Otherwise, for a reference to a local symbol, we want | |
2134 | lw $reg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
2135 | nop | |
2136 | addiu $reg,$reg,<sym> (BFD_RELOC_LO16) | |
2137 | If there is a constant, it must be added in after. */ | |
2138 | ex.X_add_number = ep->X_add_number; | |
2139 | ep->X_add_number = 0; | |
2140 | if (reg_needs_delay (GP)) | |
2141 | off = 4; | |
2142 | else | |
2143 | off = 0; | |
2144 | frag_grow (32); | |
2145 | macro_build ((char *) NULL, counter, ep, "lui", "t,u", reg, | |
2146 | (int) BFD_RELOC_MIPS_GOT_HI16); | |
2147 | macro_build ((char *) NULL, counter, (expressionS *) NULL, | |
2148 | mips_isa < 3 ? "addu" : "daddu", | |
2149 | "d,v,t", reg, reg, GP); | |
2150 | macro_build ((char *) NULL, counter, ep, | |
2151 | mips_isa < 3 ? "lw" : "ld", | |
2152 | "t,o(b)", reg, (int) BFD_RELOC_MIPS_GOT_LO16, reg); | |
2153 | p = frag_var (rs_machine_dependent, 12 + off, 0, | |
2154 | RELAX_ENCODE (12, 12 + off, off, 8 + off, 0, | |
2155 | mips_warn_about_macros), | |
2156 | ep->X_add_symbol, (long) 0, (char *) NULL); | |
2157 | if (off > 0) | |
2158 | { | |
2159 | /* We need a nop before loading from $gp. This special | |
2160 | check is required because the lui which starts the main | |
2161 | instruction stream does not refer to $gp, and so will not | |
2162 | insert the nop which may be required. */ | |
2163 | macro_build (p, counter, (expressionS *) NULL, "nop", ""); | |
2164 | p += 4; | |
2165 | } | |
2166 | macro_build (p, counter, ep, | |
2167 | mips_isa < 3 ? "lw" : "ld", | |
2168 | "t,o(b)", reg, (int) BFD_RELOC_MIPS_GOT16, GP); | |
2169 | p += 4; | |
2170 | macro_build (p, counter, (expressionS *) NULL, "nop", ""); | |
2171 | p += 4; | |
2172 | macro_build (p, counter, ep, | |
2173 | mips_isa < 3 ? "addiu" : "daddiu", | |
2174 | "t,r,j", reg, reg, (int) BFD_RELOC_LO16); | |
2175 | if (ex.X_add_number != 0) | |
2176 | { | |
2177 | if (ex.X_add_number < -0x8000 || ex.X_add_number >= 0x8000) | |
2178 | as_bad ("PIC code offset overflow (max 16 signed bits)"); | |
2179 | ex.X_op = O_constant; | |
2180 | macro_build ((char *) NULL, counter, &ex, | |
0dd2d296 ILT |
2181 | mips_isa < 3 ? "addiu" : "daddiu", |
2182 | "t,r,j", reg, reg, (int) BFD_RELOC_LO16); | |
2183 | } | |
d9aba805 ILT |
2184 | } |
2185 | else if (mips_pic == EMBEDDED_PIC) | |
2186 | { | |
2187 | /* We always do | |
2188 | addiu $reg,$gp,<sym> (BFD_RELOC_MIPS_GPREL) | |
2189 | */ | |
2190 | macro_build ((char *) NULL, counter, ep, | |
2191 | mips_isa < 3 ? "addiu" : "daddiu", | |
2192 | "t,r,j", reg, GP, (int) BFD_RELOC_MIPS_GPREL); | |
2193 | } | |
2194 | else | |
2195 | abort (); | |
0dd2d296 ILT |
2196 | } |
2197 | ||
3d3c5039 ILT |
2198 | /* |
2199 | * Build macros | |
2200 | * This routine implements the seemingly endless macro or synthesized | |
2201 | * instructions and addressing modes in the mips assembly language. Many | |
2202 | * of these macros are simple and are similar to each other. These could | |
2203 | * probably be handled by some kind of table or grammer aproach instead of | |
2204 | * this verbose method. Others are not simple macros but are more like | |
2205 | * optimizing code generation. | |
2206 | * One interesting optimization is when several store macros appear | |
2207 | * consecutivly that would load AT with the upper half of the same address. | |
2208 | * The ensuing load upper instructions are ommited. This implies some kind | |
2209 | * of global optimization. We currently only optimize within a single macro. | |
2210 | * For many of the load and store macros if the address is specified as a | |
2211 | * constant expression in the first 64k of memory (ie ld $2,0x4000c) we | |
2212 | * first load register 'at' with zero and use it as the base register. The | |
2213 | * mips assembler simply uses register $zero. Just one tiny optimization | |
2214 | * we're missing. | |
2215 | */ | |
2216 | static void | |
2217 | macro (ip) | |
2218 | struct mips_cl_insn *ip; | |
2219 | { | |
670a50eb ILT |
2220 | register int treg, sreg, dreg, breg; |
2221 | int tempreg; | |
2222 | int mask; | |
2223 | int icnt = 0; | |
2224 | int used_at; | |
670a50eb ILT |
2225 | expressionS expr1; |
2226 | const char *s; | |
8358c818 | 2227 | const char *s2; |
670a50eb | 2228 | const char *fmt; |
8358c818 ILT |
2229 | int likely = 0; |
2230 | int dbl = 0; | |
2231 | int coproc = 0; | |
b2b8c24e | 2232 | int lr = 0; |
6e8dda9c | 2233 | offsetT maxnum; |
adcf2b9d | 2234 | int off; |
9226253a | 2235 | bfd_reloc_code_real_type r; |
0dd2d296 | 2236 | char *p; |
55933a58 | 2237 | int hold_mips_optimize; |
670a50eb ILT |
2238 | |
2239 | treg = (ip->insn_opcode >> 16) & 0x1f; | |
2240 | dreg = (ip->insn_opcode >> 11) & 0x1f; | |
2241 | sreg = breg = (ip->insn_opcode >> 21) & 0x1f; | |
2242 | mask = ip->insn_mo->mask; | |
2243 | ||
5ac34ac3 ILT |
2244 | expr1.X_op = O_constant; |
2245 | expr1.X_op_symbol = NULL; | |
670a50eb ILT |
2246 | expr1.X_add_symbol = NULL; |
2247 | expr1.X_add_number = 1; | |
2248 | ||
2249 | switch (mask) | |
2250 | { | |
6e8dda9c ILT |
2251 | case M_DABS: |
2252 | dbl = 1; | |
3d3c5039 | 2253 | case M_ABS: |
6e8dda9c ILT |
2254 | /* bgez $a0,.+12 |
2255 | move v0,$a0 | |
2256 | sub v0,$zero,$a0 | |
2257 | */ | |
3d3c5039 | 2258 | |
becfe05e ILT |
2259 | mips_emit_delays (); |
2260 | ++mips_noreorder; | |
0dd2d296 | 2261 | mips_any_noreorder = 1; |
3d3c5039 | 2262 | |
670a50eb | 2263 | expr1.X_add_number = 8; |
0dd2d296 | 2264 | macro_build ((char *) NULL, &icnt, &expr1, "bgez", "s,p", sreg); |
6e8dda9c | 2265 | if (dreg == sreg) |
0dd2d296 | 2266 | macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0); |
6e8dda9c | 2267 | else |
0dd2d296 ILT |
2268 | macro_build ((char *) NULL, &icnt, NULL, "move", "d,s", dreg, sreg, 0); |
2269 | macro_build ((char *) NULL, &icnt, NULL, | |
6e8dda9c ILT |
2270 | dbl ? "dsub" : "sub", |
2271 | "d,v,t", dreg, 0, sreg); | |
3d3c5039 | 2272 | |
becfe05e | 2273 | --mips_noreorder; |
670a50eb | 2274 | return; |
3d3c5039 ILT |
2275 | |
2276 | case M_ADD_I: | |
8358c818 ILT |
2277 | s = "addi"; |
2278 | s2 = "add"; | |
2279 | goto do_addi; | |
3d3c5039 | 2280 | case M_ADDU_I: |
8358c818 ILT |
2281 | s = "addiu"; |
2282 | s2 = "addu"; | |
2283 | goto do_addi; | |
2284 | case M_DADD_I: | |
6e8dda9c | 2285 | dbl = 1; |
8358c818 ILT |
2286 | s = "daddi"; |
2287 | s2 = "dadd"; | |
2288 | goto do_addi; | |
2289 | case M_DADDU_I: | |
6e8dda9c | 2290 | dbl = 1; |
8358c818 ILT |
2291 | s = "daddiu"; |
2292 | s2 = "daddu"; | |
2293 | do_addi: | |
6e8dda9c | 2294 | if (imm_expr.X_add_number >= -0x8000 && imm_expr.X_add_number < 0x8000) |
670a50eb | 2295 | { |
0dd2d296 | 2296 | macro_build ((char *) NULL, &icnt, &imm_expr, s, "t,r,j", treg, sreg, |
9226253a | 2297 | (int) BFD_RELOC_LO16); |
670a50eb | 2298 | return; |
3d3c5039 | 2299 | } |
d8a1c247 | 2300 | load_register (&icnt, AT, &imm_expr, dbl); |
0dd2d296 | 2301 | macro_build ((char *) NULL, &icnt, NULL, s2, "d,v,t", treg, sreg, AT); |
670a50eb | 2302 | break; |
3d3c5039 ILT |
2303 | |
2304 | case M_AND_I: | |
6e8dda9c ILT |
2305 | s = "andi"; |
2306 | s2 = "and"; | |
2307 | goto do_bit; | |
3d3c5039 | 2308 | case M_OR_I: |
6e8dda9c ILT |
2309 | s = "ori"; |
2310 | s2 = "or"; | |
2311 | goto do_bit; | |
3d3c5039 | 2312 | case M_NOR_I: |
6e8dda9c ILT |
2313 | s = ""; |
2314 | s2 = "nor"; | |
2315 | goto do_bit; | |
3d3c5039 | 2316 | case M_XOR_I: |
6e8dda9c ILT |
2317 | s = "xori"; |
2318 | s2 = "xor"; | |
2319 | do_bit: | |
2320 | if (imm_expr.X_add_number >= 0 && imm_expr.X_add_number < 0x10000) | |
670a50eb | 2321 | { |
6e8dda9c | 2322 | if (mask != M_NOR_I) |
0dd2d296 ILT |
2323 | macro_build ((char *) NULL, &icnt, &imm_expr, s, "t,r,i", treg, |
2324 | sreg, (int) BFD_RELOC_LO16); | |
6e8dda9c | 2325 | else |
670a50eb | 2326 | { |
0dd2d296 ILT |
2327 | macro_build ((char *) NULL, &icnt, &imm_expr, "ori", "t,r,i", |
2328 | treg, sreg, (int) BFD_RELOC_LO16); | |
1c803e52 | 2329 | macro_build ((char *) NULL, &icnt, NULL, "nor", "d,v,t", |
0dd2d296 | 2330 | treg, treg, 0); |
3d3c5039 | 2331 | } |
6e8dda9c | 2332 | return; |
3d3c5039 | 2333 | } |
6e8dda9c | 2334 | |
d8a1c247 | 2335 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 | 2336 | macro_build ((char *) NULL, &icnt, NULL, s2, "d,v,t", treg, sreg, AT); |
670a50eb | 2337 | break; |
3d3c5039 ILT |
2338 | |
2339 | case M_BEQ_I: | |
8358c818 ILT |
2340 | s = "beq"; |
2341 | goto beq_i; | |
2342 | case M_BEQL_I: | |
2343 | s = "beql"; | |
2344 | likely = 1; | |
2345 | goto beq_i; | |
3d3c5039 | 2346 | case M_BNE_I: |
8358c818 ILT |
2347 | s = "bne"; |
2348 | goto beq_i; | |
2349 | case M_BNEL_I: | |
2350 | s = "bnel"; | |
2351 | likely = 1; | |
2352 | beq_i: | |
670a50eb ILT |
2353 | if (imm_expr.X_add_number == 0) |
2354 | { | |
0dd2d296 ILT |
2355 | macro_build ((char *) NULL, &icnt, &offset_expr, s, "s,t,p", sreg, |
2356 | 0); | |
670a50eb ILT |
2357 | return; |
2358 | } | |
d8a1c247 | 2359 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 | 2360 | macro_build ((char *) NULL, &icnt, &offset_expr, s, "s,t,p", sreg, AT); |
670a50eb | 2361 | break; |
3d3c5039 | 2362 | |
8358c818 ILT |
2363 | case M_BGEL: |
2364 | likely = 1; | |
3d3c5039 | 2365 | case M_BGE: |
670a50eb ILT |
2366 | if (treg == 0) |
2367 | { | |
0dd2d296 | 2368 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2369 | likely ? "bgezl" : "bgez", |
2370 | "s,p", sreg); | |
670a50eb | 2371 | return; |
3d3c5039 | 2372 | } |
9a7d824a ILT |
2373 | if (sreg == 0) |
2374 | { | |
0dd2d296 | 2375 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2376 | likely ? "blezl" : "blez", |
2377 | "s,p", treg); | |
9a7d824a ILT |
2378 | return; |
2379 | } | |
0dd2d296 ILT |
2380 | macro_build ((char *) NULL, &icnt, NULL, "slt", "d,v,t", AT, sreg, treg); |
2381 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
8358c818 ILT |
2382 | likely ? "beql" : "beq", |
2383 | "s,t,p", AT, 0); | |
670a50eb | 2384 | break; |
3d3c5039 | 2385 | |
8358c818 ILT |
2386 | case M_BGTL_I: |
2387 | likely = 1; | |
3d3c5039 | 2388 | case M_BGT_I: |
9a7d824a | 2389 | /* check for > max integer */ |
6e8dda9c ILT |
2390 | maxnum = 0x7fffffff; |
2391 | if (mips_isa >= 3) | |
2392 | { | |
2393 | maxnum <<= 16; | |
2394 | maxnum |= 0xffff; | |
2395 | maxnum <<= 16; | |
2396 | maxnum |= 0xffff; | |
2397 | } | |
7b777690 ILT |
2398 | if (imm_expr.X_add_number >= maxnum |
2399 | && (mips_isa < 3 || sizeof (maxnum) > 4)) | |
9a7d824a ILT |
2400 | { |
2401 | do_false: | |
2402 | /* result is always false */ | |
8358c818 ILT |
2403 | if (! likely) |
2404 | { | |
2405 | as_warn ("Branch %s is always false (nop)", ip->insn_mo->name); | |
0dd2d296 | 2406 | macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0); |
8358c818 ILT |
2407 | } |
2408 | else | |
2409 | { | |
2410 | as_warn ("Branch likely %s is always false", ip->insn_mo->name); | |
0dd2d296 ILT |
2411 | macro_build ((char *) NULL, &icnt, &offset_expr, "bnel", |
2412 | "s,t,p", 0, 0); | |
8358c818 | 2413 | } |
9a7d824a ILT |
2414 | return; |
2415 | } | |
670a50eb ILT |
2416 | imm_expr.X_add_number++; |
2417 | /* FALLTHROUGH */ | |
3d3c5039 | 2418 | case M_BGE_I: |
8358c818 ILT |
2419 | case M_BGEL_I: |
2420 | if (mask == M_BGEL_I) | |
2421 | likely = 1; | |
670a50eb ILT |
2422 | if (imm_expr.X_add_number == 0) |
2423 | { | |
0dd2d296 | 2424 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2425 | likely ? "bgezl" : "bgez", |
2426 | "s,p", sreg); | |
670a50eb | 2427 | return; |
3d3c5039 | 2428 | } |
670a50eb ILT |
2429 | if (imm_expr.X_add_number == 1) |
2430 | { | |
0dd2d296 | 2431 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2432 | likely ? "bgtzl" : "bgtz", |
2433 | "s,p", sreg); | |
670a50eb | 2434 | return; |
3d3c5039 | 2435 | } |
6e8dda9c ILT |
2436 | maxnum = 0x7fffffff; |
2437 | if (mips_isa >= 3) | |
2438 | { | |
2439 | maxnum <<= 16; | |
2440 | maxnum |= 0xffff; | |
2441 | maxnum <<= 16; | |
2442 | maxnum |= 0xffff; | |
2443 | } | |
2444 | maxnum = - maxnum - 1; | |
7b777690 ILT |
2445 | if (imm_expr.X_add_number <= maxnum |
2446 | && (mips_isa < 3 || sizeof (maxnum) > 4)) | |
9a7d824a ILT |
2447 | { |
2448 | do_true: | |
2449 | /* result is always true */ | |
2450 | as_warn ("Branch %s is always true", ip->insn_mo->name); | |
0dd2d296 | 2451 | macro_build ((char *) NULL, &icnt, &offset_expr, "b", "p"); |
9a7d824a ILT |
2452 | return; |
2453 | } | |
6e8dda9c | 2454 | set_at (&icnt, sreg, 0); |
0dd2d296 | 2455 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2456 | likely ? "beql" : "beq", |
2457 | "s,t,p", AT, 0); | |
670a50eb | 2458 | break; |
3d3c5039 | 2459 | |
8358c818 ILT |
2460 | case M_BGEUL: |
2461 | likely = 1; | |
3d3c5039 | 2462 | case M_BGEU: |
670a50eb | 2463 | if (treg == 0) |
9a7d824a ILT |
2464 | goto do_true; |
2465 | if (sreg == 0) | |
670a50eb | 2466 | { |
0dd2d296 | 2467 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2468 | likely ? "beql" : "beq", |
2469 | "s,t,p", 0, treg); | |
670a50eb | 2470 | return; |
3d3c5039 | 2471 | } |
0dd2d296 ILT |
2472 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", AT, sreg, |
2473 | treg); | |
2474 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
8358c818 ILT |
2475 | likely ? "beql" : "beq", |
2476 | "s,t,p", AT, 0); | |
670a50eb | 2477 | break; |
3d3c5039 | 2478 | |
8358c818 ILT |
2479 | case M_BGTUL_I: |
2480 | likely = 1; | |
9a7d824a | 2481 | case M_BGTU_I: |
6e8dda9c | 2482 | if (sreg == 0 || imm_expr.X_add_number == -1) |
9a7d824a ILT |
2483 | goto do_false; |
2484 | imm_expr.X_add_number++; | |
2485 | /* FALLTHROUGH */ | |
3d3c5039 | 2486 | case M_BGEU_I: |
8358c818 ILT |
2487 | case M_BGEUL_I: |
2488 | if (mask == M_BGEUL_I) | |
2489 | likely = 1; | |
670a50eb | 2490 | if (imm_expr.X_add_number == 0) |
9a7d824a | 2491 | goto do_true; |
670a50eb ILT |
2492 | if (imm_expr.X_add_number == 1) |
2493 | { | |
0dd2d296 | 2494 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2495 | likely ? "bnel" : "bne", |
2496 | "s,t,p", sreg, 0); | |
670a50eb | 2497 | return; |
3d3c5039 | 2498 | } |
6e8dda9c | 2499 | set_at (&icnt, sreg, 1); |
0dd2d296 | 2500 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2501 | likely ? "beql" : "beq", |
2502 | "s,t,p", AT, 0); | |
670a50eb | 2503 | break; |
3d3c5039 | 2504 | |
8358c818 ILT |
2505 | case M_BGTL: |
2506 | likely = 1; | |
3d3c5039 | 2507 | case M_BGT: |
670a50eb ILT |
2508 | if (treg == 0) |
2509 | { | |
0dd2d296 | 2510 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2511 | likely ? "bgtzl" : "bgtz", |
2512 | "s,p", sreg); | |
670a50eb | 2513 | return; |
3d3c5039 | 2514 | } |
9a7d824a ILT |
2515 | if (sreg == 0) |
2516 | { | |
0dd2d296 | 2517 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2518 | likely ? "bltzl" : "bltz", |
2519 | "s,p", treg); | |
9a7d824a ILT |
2520 | return; |
2521 | } | |
0dd2d296 ILT |
2522 | macro_build ((char *) NULL, &icnt, NULL, "slt", "d,v,t", AT, treg, sreg); |
2523 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
8358c818 ILT |
2524 | likely ? "bnel" : "bne", |
2525 | "s,t,p", AT, 0); | |
670a50eb | 2526 | break; |
3d3c5039 | 2527 | |
8358c818 ILT |
2528 | case M_BGTUL: |
2529 | likely = 1; | |
3d3c5039 | 2530 | case M_BGTU: |
670a50eb ILT |
2531 | if (treg == 0) |
2532 | { | |
0dd2d296 | 2533 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2534 | likely ? "bnel" : "bne", |
2535 | "s,t,p", sreg, 0); | |
670a50eb | 2536 | return; |
3d3c5039 | 2537 | } |
9a7d824a ILT |
2538 | if (sreg == 0) |
2539 | goto do_false; | |
0dd2d296 ILT |
2540 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", AT, treg, |
2541 | sreg); | |
2542 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
8358c818 ILT |
2543 | likely ? "bnel" : "bne", |
2544 | "s,t,p", AT, 0); | |
670a50eb | 2545 | break; |
3d3c5039 | 2546 | |
8358c818 ILT |
2547 | case M_BLEL: |
2548 | likely = 1; | |
3d3c5039 | 2549 | case M_BLE: |
670a50eb ILT |
2550 | if (treg == 0) |
2551 | { | |
0dd2d296 | 2552 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2553 | likely ? "blezl" : "blez", |
2554 | "s,p", sreg); | |
670a50eb ILT |
2555 | return; |
2556 | } | |
9a7d824a ILT |
2557 | if (sreg == 0) |
2558 | { | |
0dd2d296 | 2559 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2560 | likely ? "bgezl" : "bgez", |
2561 | "s,p", treg); | |
9a7d824a ILT |
2562 | return; |
2563 | } | |
0dd2d296 ILT |
2564 | macro_build ((char *) NULL, &icnt, NULL, "slt", "d,v,t", AT, treg, sreg); |
2565 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
8358c818 ILT |
2566 | likely ? "beql" : "beq", |
2567 | "s,t,p", AT, 0); | |
670a50eb | 2568 | break; |
3d3c5039 | 2569 | |
8358c818 ILT |
2570 | case M_BLEL_I: |
2571 | likely = 1; | |
3d3c5039 | 2572 | case M_BLE_I: |
6e8dda9c ILT |
2573 | maxnum = 0x7fffffff; |
2574 | if (mips_isa >= 3) | |
2575 | { | |
2576 | maxnum <<= 16; | |
2577 | maxnum |= 0xffff; | |
2578 | maxnum <<= 16; | |
2579 | maxnum |= 0xffff; | |
2580 | } | |
7b777690 ILT |
2581 | if (imm_expr.X_add_number >= maxnum |
2582 | && (mips_isa < 3 || sizeof (maxnum) > 4)) | |
9a7d824a ILT |
2583 | goto do_true; |
2584 | imm_expr.X_add_number++; | |
2585 | /* FALLTHROUGH */ | |
9a7d824a | 2586 | case M_BLT_I: |
8358c818 ILT |
2587 | case M_BLTL_I: |
2588 | if (mask == M_BLTL_I) | |
2589 | likely = 1; | |
670a50eb ILT |
2590 | if (imm_expr.X_add_number == 0) |
2591 | { | |
0dd2d296 | 2592 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2593 | likely ? "bltzl" : "bltz", |
2594 | "s,p", sreg); | |
670a50eb ILT |
2595 | return; |
2596 | } | |
9a7d824a | 2597 | if (imm_expr.X_add_number == 1) |
670a50eb | 2598 | { |
0dd2d296 | 2599 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2600 | likely ? "blezl" : "blez", |
2601 | "s,p", sreg); | |
670a50eb ILT |
2602 | return; |
2603 | } | |
6e8dda9c | 2604 | set_at (&icnt, sreg, 0); |
0dd2d296 | 2605 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2606 | likely ? "bnel" : "bne", |
2607 | "s,t,p", AT, 0); | |
670a50eb | 2608 | break; |
3d3c5039 | 2609 | |
8358c818 ILT |
2610 | case M_BLEUL: |
2611 | likely = 1; | |
3d3c5039 | 2612 | case M_BLEU: |
670a50eb ILT |
2613 | if (treg == 0) |
2614 | { | |
0dd2d296 | 2615 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2616 | likely ? "beql" : "beq", |
2617 | "s,t,p", sreg, 0); | |
670a50eb | 2618 | return; |
3d3c5039 | 2619 | } |
9a7d824a ILT |
2620 | if (sreg == 0) |
2621 | goto do_true; | |
0dd2d296 ILT |
2622 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", AT, treg, |
2623 | sreg); | |
2624 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
8358c818 ILT |
2625 | likely ? "beql" : "beq", |
2626 | "s,t,p", AT, 0); | |
670a50eb | 2627 | break; |
3d3c5039 | 2628 | |
8358c818 ILT |
2629 | case M_BLEUL_I: |
2630 | likely = 1; | |
3d3c5039 | 2631 | case M_BLEU_I: |
6e8dda9c | 2632 | if (sreg == 0 || imm_expr.X_add_number == -1) |
9a7d824a ILT |
2633 | goto do_true; |
2634 | imm_expr.X_add_number++; | |
2635 | /* FALLTHROUGH */ | |
9a7d824a | 2636 | case M_BLTU_I: |
8358c818 ILT |
2637 | case M_BLTUL_I: |
2638 | if (mask == M_BLTUL_I) | |
2639 | likely = 1; | |
670a50eb | 2640 | if (imm_expr.X_add_number == 0) |
9a7d824a ILT |
2641 | goto do_false; |
2642 | if (imm_expr.X_add_number == 1) | |
670a50eb | 2643 | { |
0dd2d296 | 2644 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2645 | likely ? "beql" : "beq", |
2646 | "s,t,p", sreg, 0); | |
670a50eb | 2647 | return; |
3d3c5039 | 2648 | } |
6e8dda9c | 2649 | set_at (&icnt, sreg, 1); |
0dd2d296 | 2650 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2651 | likely ? "bnel" : "bne", |
2652 | "s,t,p", AT, 0); | |
670a50eb | 2653 | break; |
3d3c5039 | 2654 | |
8358c818 ILT |
2655 | case M_BLTL: |
2656 | likely = 1; | |
3d3c5039 | 2657 | case M_BLT: |
670a50eb ILT |
2658 | if (treg == 0) |
2659 | { | |
0dd2d296 | 2660 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2661 | likely ? "bltzl" : "bltz", |
2662 | "s,p", sreg); | |
670a50eb | 2663 | return; |
3d3c5039 | 2664 | } |
9a7d824a | 2665 | if (sreg == 0) |
670a50eb | 2666 | { |
0dd2d296 | 2667 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2668 | likely ? "bgtzl" : "bgtz", |
2669 | "s,p", treg); | |
670a50eb | 2670 | return; |
3d3c5039 | 2671 | } |
0dd2d296 ILT |
2672 | macro_build ((char *) NULL, &icnt, NULL, "slt", "d,v,t", AT, sreg, treg); |
2673 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
8358c818 ILT |
2674 | likely ? "bnel" : "bne", |
2675 | "s,t,p", AT, 0); | |
670a50eb | 2676 | break; |
3d3c5039 | 2677 | |
8358c818 ILT |
2678 | case M_BLTUL: |
2679 | likely = 1; | |
3d3c5039 | 2680 | case M_BLTU: |
670a50eb | 2681 | if (treg == 0) |
9a7d824a ILT |
2682 | goto do_false; |
2683 | if (sreg == 0) | |
670a50eb | 2684 | { |
0dd2d296 | 2685 | macro_build ((char *) NULL, &icnt, &offset_expr, |
8358c818 ILT |
2686 | likely ? "bnel" : "bne", |
2687 | "s,t,p", 0, treg); | |
670a50eb ILT |
2688 | return; |
2689 | } | |
0dd2d296 ILT |
2690 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", AT, sreg, |
2691 | treg); | |
2692 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
8358c818 ILT |
2693 | likely ? "bnel" : "bne", |
2694 | "s,t,p", AT, 0); | |
670a50eb | 2695 | break; |
3d3c5039 | 2696 | |
8358c818 ILT |
2697 | case M_DDIV_3: |
2698 | dbl = 1; | |
3d3c5039 | 2699 | case M_DIV_3: |
8358c818 ILT |
2700 | s = "mflo"; |
2701 | goto do_div3; | |
2702 | case M_DREM_3: | |
2703 | dbl = 1; | |
3d3c5039 | 2704 | case M_REM_3: |
8358c818 ILT |
2705 | s = "mfhi"; |
2706 | do_div3: | |
670a50eb ILT |
2707 | if (treg == 0) |
2708 | { | |
2709 | as_warn ("Divide by zero."); | |
8ea7f4e8 ILT |
2710 | if (mips_trap) |
2711 | macro_build ((char *) NULL, &icnt, NULL, "teq", "s,t", 0, 0); | |
2712 | else | |
2713 | macro_build ((char *) NULL, &icnt, NULL, "break", "c", 7); | |
670a50eb ILT |
2714 | return; |
2715 | } | |
2716 | ||
becfe05e ILT |
2717 | mips_emit_delays (); |
2718 | ++mips_noreorder; | |
0dd2d296 ILT |
2719 | mips_any_noreorder = 1; |
2720 | macro_build ((char *) NULL, &icnt, NULL, | |
8358c818 | 2721 | dbl ? "ddiv" : "div", |
ff3a5c18 | 2722 | "z,s,t", sreg, treg); |
8ea7f4e8 ILT |
2723 | if (mips_trap) |
2724 | macro_build ((char *) NULL, &icnt, NULL, "teq", "s,t", treg, 0); | |
2725 | else | |
2726 | { | |
2727 | expr1.X_add_number = 8; | |
2728 | macro_build ((char *) NULL, &icnt, &expr1, "bne", "s,t,p", treg, 0); | |
2729 | macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0); | |
2730 | macro_build ((char *) NULL, &icnt, NULL, "break", "c", 7); | |
2731 | } | |
670a50eb | 2732 | expr1.X_add_number = -1; |
0dd2d296 | 2733 | macro_build ((char *) NULL, &icnt, &expr1, |
8358c818 | 2734 | dbl ? "daddiu" : "addiu", |
9226253a | 2735 | "t,r,j", AT, 0, (int) BFD_RELOC_LO16); |
8ea7f4e8 | 2736 | expr1.X_add_number = mips_trap ? (dbl ? 12 : 8) : (dbl ? 20 : 16); |
0dd2d296 | 2737 | macro_build ((char *) NULL, &icnt, &expr1, "bne", "s,t,p", treg, AT); |
8358c818 ILT |
2738 | if (dbl) |
2739 | { | |
2740 | expr1.X_add_number = 1; | |
0dd2d296 | 2741 | macro_build ((char *) NULL, &icnt, &expr1, "daddiu", "t,r,j", AT, 0, |
9226253a | 2742 | (int) BFD_RELOC_LO16); |
0dd2d296 ILT |
2743 | macro_build ((char *) NULL, &icnt, NULL, "dsll32", "d,w,<", AT, AT, |
2744 | 31); | |
8358c818 ILT |
2745 | } |
2746 | else | |
2747 | { | |
2748 | expr1.X_add_number = 0x80000000; | |
ecd4ca1c ILT |
2749 | macro_build ((char *) NULL, &icnt, &expr1, "lui", "t,u", AT, |
2750 | (int) BFD_RELOC_HI16); | |
8358c818 | 2751 | } |
8ea7f4e8 ILT |
2752 | if (mips_trap) |
2753 | macro_build ((char *) NULL, &icnt, NULL, "teq", "s,t", sreg, AT); | |
2754 | else | |
2755 | { | |
2756 | expr1.X_add_number = 8; | |
2757 | macro_build ((char *) NULL, &icnt, &expr1, "bne", "s,t,p", sreg, AT); | |
2758 | macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0); | |
2759 | macro_build ((char *) NULL, &icnt, NULL, "break", "c", 6); | |
2760 | } | |
becfe05e | 2761 | --mips_noreorder; |
0dd2d296 | 2762 | macro_build ((char *) NULL, &icnt, NULL, s, "d", dreg); |
670a50eb | 2763 | break; |
3d3c5039 ILT |
2764 | |
2765 | case M_DIV_3I: | |
8358c818 ILT |
2766 | s = "div"; |
2767 | s2 = "mflo"; | |
2768 | goto do_divi; | |
3d3c5039 | 2769 | case M_DIVU_3I: |
8358c818 ILT |
2770 | s = "divu"; |
2771 | s2 = "mflo"; | |
2772 | goto do_divi; | |
3d3c5039 | 2773 | case M_REM_3I: |
8358c818 ILT |
2774 | s = "div"; |
2775 | s2 = "mfhi"; | |
2776 | goto do_divi; | |
3d3c5039 | 2777 | case M_REMU_3I: |
8358c818 ILT |
2778 | s = "divu"; |
2779 | s2 = "mfhi"; | |
2780 | goto do_divi; | |
2781 | case M_DDIV_3I: | |
2782 | dbl = 1; | |
2783 | s = "ddiv"; | |
2784 | s2 = "mflo"; | |
2785 | goto do_divi; | |
2786 | case M_DDIVU_3I: | |
2787 | dbl = 1; | |
2788 | s = "ddivu"; | |
2789 | s2 = "mflo"; | |
2790 | goto do_divi; | |
2791 | case M_DREM_3I: | |
2792 | dbl = 1; | |
2793 | s = "ddiv"; | |
2794 | s2 = "mfhi"; | |
2795 | goto do_divi; | |
2796 | case M_DREMU_3I: | |
2797 | dbl = 1; | |
2798 | s = "ddivu"; | |
2799 | s2 = "mfhi"; | |
2800 | do_divi: | |
670a50eb ILT |
2801 | if (imm_expr.X_add_number == 0) |
2802 | { | |
2803 | as_warn ("Divide by zero."); | |
8ea7f4e8 ILT |
2804 | if (mips_trap) |
2805 | macro_build ((char *) NULL, &icnt, NULL, "teq", "s,t", 0, 0); | |
2806 | else | |
2807 | macro_build ((char *) NULL, &icnt, NULL, "break", "c", 7); | |
670a50eb ILT |
2808 | return; |
2809 | } | |
2810 | if (imm_expr.X_add_number == 1) | |
2811 | { | |
8358c818 | 2812 | if (strcmp (s2, "mflo") == 0) |
0dd2d296 ILT |
2813 | macro_build ((char *) NULL, &icnt, NULL, "move", "d,s", dreg, |
2814 | sreg); | |
3d3c5039 | 2815 | else |
0dd2d296 | 2816 | macro_build ((char *) NULL, &icnt, NULL, "move", "d,s", dreg, 0); |
3d3c5039 ILT |
2817 | return; |
2818 | } | |
8358c818 ILT |
2819 | if (imm_expr.X_add_number == -1 |
2820 | && s[strlen (s) - 1] != 'u') | |
2821 | { | |
2822 | if (strcmp (s2, "mflo") == 0) | |
2823 | { | |
2824 | if (dbl) | |
0dd2d296 ILT |
2825 | macro_build ((char *) NULL, &icnt, NULL, "dneg", "d,w", dreg, |
2826 | sreg); | |
8358c818 | 2827 | else |
0dd2d296 ILT |
2828 | macro_build ((char *) NULL, &icnt, NULL, "neg", "d,w", dreg, |
2829 | sreg); | |
8358c818 ILT |
2830 | } |
2831 | else | |
0dd2d296 | 2832 | macro_build ((char *) NULL, &icnt, NULL, "move", "d,s", dreg, 0); |
8358c818 ILT |
2833 | return; |
2834 | } | |
3d3c5039 | 2835 | |
d8a1c247 | 2836 | load_register (&icnt, AT, &imm_expr, dbl); |
0dd2d296 ILT |
2837 | macro_build ((char *) NULL, &icnt, NULL, s, "z,s,t", sreg, AT); |
2838 | macro_build ((char *) NULL, &icnt, NULL, s2, "d", dreg); | |
670a50eb ILT |
2839 | break; |
2840 | ||
2841 | case M_DIVU_3: | |
8358c818 ILT |
2842 | s = "divu"; |
2843 | s2 = "mflo"; | |
2844 | goto do_divu3; | |
670a50eb | 2845 | case M_REMU_3: |
8358c818 ILT |
2846 | s = "divu"; |
2847 | s2 = "mfhi"; | |
2848 | goto do_divu3; | |
2849 | case M_DDIVU_3: | |
2850 | s = "ddivu"; | |
2851 | s2 = "mflo"; | |
2852 | goto do_divu3; | |
2853 | case M_DREMU_3: | |
2854 | s = "ddivu"; | |
2855 | s2 = "mfhi"; | |
2856 | do_divu3: | |
becfe05e ILT |
2857 | mips_emit_delays (); |
2858 | ++mips_noreorder; | |
0dd2d296 ILT |
2859 | mips_any_noreorder = 1; |
2860 | macro_build ((char *) NULL, &icnt, NULL, s, "z,s,t", sreg, treg); | |
8ea7f4e8 ILT |
2861 | if (mips_trap) |
2862 | macro_build ((char *) NULL, &icnt, NULL, "teq", "s,t", treg, 0); | |
2863 | else | |
2864 | { | |
2865 | expr1.X_add_number = 8; | |
2866 | macro_build ((char *) NULL, &icnt, &expr1, "bne", "s,t,p", treg, 0); | |
2867 | macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0); | |
2868 | macro_build ((char *) NULL, &icnt, NULL, "break", "c", 7); | |
2869 | } | |
becfe05e | 2870 | --mips_noreorder; |
0dd2d296 | 2871 | macro_build ((char *) NULL, &icnt, NULL, s2, "d", dreg); |
670a50eb | 2872 | return; |
3d3c5039 | 2873 | |
d8a1c247 KR |
2874 | case M_DLA_AB: |
2875 | dbl = 1; | |
0dd2d296 | 2876 | case M_LA_AB: |
d9aba805 ILT |
2877 | /* Load the address of a symbol into a register. If breg is not |
2878 | zero, we then add a base register to it. */ | |
ecd4ca1c ILT |
2879 | |
2880 | /* When generating embedded PIC code, we permit expressions of | |
2881 | the form | |
2882 | la $4,foo-bar | |
2883 | where bar is an address in the .text section. These are used | |
2884 | when getting the addresses of functions. We don't permit | |
2885 | X_add_number to be non-zero, because if the symbol is | |
2886 | external the relaxing code needs to know that any addend is | |
2887 | purely the offset to X_op_symbol. */ | |
2888 | if (mips_pic == EMBEDDED_PIC | |
2889 | && offset_expr.X_op == O_subtract | |
2890 | && now_seg == text_section | |
847a01cd ILT |
2891 | && (offset_expr.X_op_symbol->sy_value.X_op == O_constant |
2892 | ? S_GET_SEGMENT (offset_expr.X_op_symbol) == text_section | |
2893 | : (offset_expr.X_op_symbol->sy_value.X_op == O_symbol | |
2894 | && (S_GET_SEGMENT (offset_expr.X_op_symbol | |
2895 | ->sy_value.X_add_symbol) | |
2896 | == text_section))) | |
ecd4ca1c ILT |
2897 | && breg == 0 |
2898 | && offset_expr.X_add_number == 0) | |
2899 | { | |
2900 | macro_build ((char *) NULL, &icnt, &offset_expr, "lui", "t,u", | |
2901 | treg, (int) BFD_RELOC_PCREL_HI16_S); | |
2902 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
2903 | mips_isa < 3 ? "addiu" : "daddiu", | |
2904 | "t,r,j", treg, treg, (int) BFD_RELOC_PCREL_LO16); | |
2905 | return; | |
2906 | } | |
2907 | ||
0dd2d296 ILT |
2908 | if (offset_expr.X_op != O_symbol |
2909 | && offset_expr.X_op != O_constant) | |
670a50eb | 2910 | { |
0dd2d296 ILT |
2911 | as_bad ("expression too complex"); |
2912 | offset_expr.X_op = O_constant; | |
2913 | } | |
2914 | ||
2915 | if (treg == breg) | |
2916 | { | |
2917 | tempreg = AT; | |
2918 | used_at = 1; | |
3d3c5039 | 2919 | } |
670a50eb ILT |
2920 | else |
2921 | { | |
0dd2d296 ILT |
2922 | tempreg = treg; |
2923 | used_at = 0; | |
670a50eb | 2924 | } |
3d3c5039 | 2925 | |
5ac34ac3 | 2926 | if (offset_expr.X_op == O_constant) |
d8a1c247 | 2927 | load_register (&icnt, tempreg, &offset_expr, dbl); |
d9aba805 | 2928 | else if (mips_pic == NO_PIC) |
670a50eb | 2929 | { |
0dd2d296 ILT |
2930 | /* If this is a reference to an GP relative symbol, we want |
2931 | addiu $tempreg,$gp,<sym> (BFD_RELOC_MIPS_GPREL) | |
2932 | Otherwise we want | |
2933 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) | |
2934 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) | |
2935 | If we have a constant, we need two instructions anyhow, | |
2936 | so we may as well always use the latter form. */ | |
7a15a226 | 2937 | if ((valueT) offset_expr.X_add_number >= MAX_GPREL_OFFSET |
d8a1c247 | 2938 | || nopic_need_relax (offset_expr.X_add_symbol)) |
0dd2d296 ILT |
2939 | p = NULL; |
2940 | else | |
2941 | { | |
8ea7f4e8 | 2942 | frag_grow (20); |
0dd2d296 ILT |
2943 | macro_build ((char *) NULL, &icnt, &offset_expr, |
2944 | mips_isa < 3 ? "addiu" : "daddiu", | |
2945 | "t,r,j", tempreg, GP, (int) BFD_RELOC_MIPS_GPREL); | |
2946 | p = frag_var (rs_machine_dependent, 8, 0, | |
2947 | RELAX_ENCODE (4, 8, 0, 4, 0, | |
2948 | mips_warn_about_macros), | |
2949 | offset_expr.X_add_symbol, (long) 0, | |
2950 | (char *) NULL); | |
2951 | } | |
2952 | macro_build_lui (p, &icnt, &offset_expr, tempreg); | |
2953 | if (p != NULL) | |
2954 | p += 4; | |
2955 | macro_build (p, &icnt, &offset_expr, | |
6e8dda9c | 2956 | mips_isa < 3 ? "addiu" : "daddiu", |
0dd2d296 ILT |
2957 | "t,r,j", tempreg, tempreg, (int) BFD_RELOC_LO16); |
2958 | } | |
fb251650 | 2959 | else if (mips_pic == SVR4_PIC && ! mips_big_got) |
0dd2d296 ILT |
2960 | { |
2961 | /* If this is a reference to an external symbol, and there | |
2962 | is no constant, we want | |
2963 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
2964 | For a local symbol, we want | |
2965 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
2966 | nop | |
2967 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) | |
2968 | ||
2969 | If we have a small constant, and this is a reference to | |
2970 | an external symbol, we want | |
2971 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
2972 | nop | |
2973 | addiu $tempreg,$tempreg,<constant> | |
2974 | For a local symbol, we want the same instruction | |
2975 | sequence, but we output a BFD_RELOC_LO16 reloc on the | |
2976 | addiu instruction. | |
2977 | ||
2978 | If we have a large constant, and this is a reference to | |
2979 | an external symbol, we want | |
2980 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
2981 | lui $at,<hiconstant> | |
2982 | addiu $at,$at,<loconstant> | |
2983 | addu $tempreg,$tempreg,$at | |
2984 | For a local symbol, we want the same instruction | |
2985 | sequence, but we output a BFD_RELOC_LO16 reloc on the | |
2986 | addiu instruction. */ | |
2987 | expr1.X_add_number = offset_expr.X_add_number; | |
2988 | offset_expr.X_add_number = 0; | |
8ea7f4e8 | 2989 | frag_grow (32); |
0dd2d296 | 2990 | macro_build ((char *) NULL, &icnt, &offset_expr, |
d8a1c247 | 2991 | dbl ? "ld" : "lw", |
0dd2d296 ILT |
2992 | "t,o(b)", tempreg, (int) BFD_RELOC_MIPS_GOT16, GP); |
2993 | if (expr1.X_add_number == 0) | |
2994 | { | |
2995 | int off; | |
2996 | ||
2997 | if (breg == 0) | |
2998 | off = 0; | |
2999 | else | |
3000 | { | |
3001 | /* We're going to put in an addu instruction using | |
3002 | tempreg, so we may as well insert the nop right | |
3003 | now. */ | |
3004 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3005 | "nop", ""); | |
3006 | off = 4; | |
3007 | } | |
3008 | p = frag_var (rs_machine_dependent, 8 - off, 0, | |
3009 | RELAX_ENCODE (0, 8 - off, -4 - off, 4 - off, 0, | |
3010 | (breg == 0 | |
3011 | ? mips_warn_about_macros | |
3012 | : 0)), | |
3013 | offset_expr.X_add_symbol, (long) 0, | |
3014 | (char *) NULL); | |
3015 | if (breg == 0) | |
3016 | { | |
3017 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
3018 | p += 4; | |
3019 | } | |
3020 | macro_build (p, &icnt, &expr1, | |
3021 | mips_isa < 3 ? "addiu" : "daddiu", | |
3022 | "t,r,j", tempreg, tempreg, (int) BFD_RELOC_LO16); | |
3023 | /* FIXME: If breg == 0, and the next instruction uses | |
3024 | $tempreg, then if this variant case is used an extra | |
3025 | nop will be generated. */ | |
3026 | } | |
3027 | else if (expr1.X_add_number >= -0x8000 | |
3028 | && expr1.X_add_number < 0x8000) | |
3029 | { | |
3030 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3031 | "nop", ""); | |
3032 | macro_build ((char *) NULL, &icnt, &expr1, | |
3033 | mips_isa < 3 ? "addiu" : "daddiu", | |
3034 | "t,r,j", tempreg, tempreg, (int) BFD_RELOC_LO16); | |
3035 | (void) frag_var (rs_machine_dependent, 0, 0, | |
3036 | RELAX_ENCODE (0, 0, -12, -4, 0, 0), | |
3037 | offset_expr.X_add_symbol, (long) 0, | |
3038 | (char *) NULL); | |
3039 | } | |
3040 | else | |
3041 | { | |
3042 | int off1; | |
3043 | ||
3044 | /* If we are going to add in a base register, and the | |
3045 | target register and the base register are the same, | |
3046 | then we are using AT as a temporary register. Since | |
3047 | we want to load the constant into AT, we add our | |
3048 | current AT (from the global offset table) and the | |
3049 | register into the register now, and pretend we were | |
3050 | not using a base register. */ | |
3051 | if (breg != treg) | |
3052 | off1 = 0; | |
3053 | else | |
3054 | { | |
3055 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3056 | "nop", ""); | |
3057 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3058 | mips_isa < 3 ? "addu" : "daddu", | |
3059 | "d,v,t", treg, AT, breg); | |
3060 | breg = 0; | |
3061 | tempreg = treg; | |
3062 | off1 = -8; | |
3063 | } | |
3064 | ||
55933a58 ILT |
3065 | /* Set mips_optimize around the lui instruction to avoid |
3066 | inserting an unnecessary nop after the lw. */ | |
3067 | hold_mips_optimize = mips_optimize; | |
3068 | mips_optimize = 2; | |
0dd2d296 | 3069 | macro_build_lui ((char *) NULL, &icnt, &expr1, AT); |
55933a58 ILT |
3070 | mips_optimize = hold_mips_optimize; |
3071 | ||
0dd2d296 ILT |
3072 | macro_build ((char *) NULL, &icnt, &expr1, |
3073 | mips_isa < 3 ? "addiu" : "daddiu", | |
3074 | "t,r,j", AT, AT, (int) BFD_RELOC_LO16); | |
3075 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3076 | mips_isa < 3 ? "addu" : "daddu", | |
3077 | "d,v,t", tempreg, tempreg, AT); | |
3078 | (void) frag_var (rs_machine_dependent, 0, 0, | |
3079 | RELAX_ENCODE (0, 0, -16 + off1, -8, 0, 0), | |
3080 | offset_expr.X_add_symbol, (long) 0, | |
3081 | (char *) NULL); | |
3082 | used_at = 1; | |
3083 | } | |
670a50eb | 3084 | } |
fb251650 ILT |
3085 | else if (mips_pic == SVR4_PIC) |
3086 | { | |
3087 | int gpdel; | |
3088 | ||
3089 | /* This is the large GOT case. If this is a reference to an | |
3090 | external symbol, and there is no constant, we want | |
3091 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) | |
3092 | addu $tempreg,$tempreg,$gp | |
3093 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) | |
3094 | For a local symbol, we want | |
3095 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
3096 | nop | |
3097 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) | |
3098 | ||
3099 | If we have a small constant, and this is a reference to | |
3100 | an external symbol, we want | |
3101 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) | |
3102 | addu $tempreg,$tempreg,$gp | |
3103 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) | |
3104 | nop | |
3105 | addiu $tempreg,$tempreg,<constant> | |
3106 | For a local symbol, we want | |
3107 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
3108 | nop | |
3109 | addiu $tempreg,$tempreg,<constant> (BFD_RELOC_LO16) | |
3110 | ||
3111 | If we have a large constant, and this is a reference to | |
3112 | an external symbol, we want | |
3113 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) | |
3114 | addu $tempreg,$tempreg,$gp | |
3115 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) | |
3116 | lui $at,<hiconstant> | |
3117 | addiu $at,$at,<loconstant> | |
3118 | addu $tempreg,$tempreg,$at | |
3119 | For a local symbol, we want | |
3120 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
3121 | lui $at,<hiconstant> | |
3122 | addiu $at,$at,<loconstant> (BFD_RELOC_LO16) | |
3123 | addu $tempreg,$tempreg,$at | |
3124 | */ | |
3125 | expr1.X_add_number = offset_expr.X_add_number; | |
3126 | offset_expr.X_add_number = 0; | |
3127 | frag_grow (52); | |
3128 | if (reg_needs_delay (GP)) | |
3129 | gpdel = 4; | |
3130 | else | |
3131 | gpdel = 0; | |
3132 | macro_build ((char *) NULL, &icnt, &offset_expr, "lui", "t,u", | |
3133 | tempreg, (int) BFD_RELOC_MIPS_GOT_HI16); | |
3134 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3135 | mips_isa < 3 ? "addu" : "daddu", | |
3136 | "d,v,t", tempreg, tempreg, GP); | |
3137 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
3138 | dbl ? "ld" : "lw", | |
3139 | "t,o(b)", tempreg, (int) BFD_RELOC_MIPS_GOT_LO16, | |
3140 | tempreg); | |
3141 | if (expr1.X_add_number == 0) | |
3142 | { | |
3143 | int off; | |
3144 | ||
3145 | if (breg == 0) | |
3146 | off = 0; | |
3147 | else | |
3148 | { | |
3149 | /* We're going to put in an addu instruction using | |
3150 | tempreg, so we may as well insert the nop right | |
3151 | now. */ | |
3152 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3153 | "nop", ""); | |
3154 | off = 4; | |
3155 | } | |
3156 | ||
3157 | p = frag_var (rs_machine_dependent, 12 + gpdel, 0, | |
3158 | RELAX_ENCODE (12 + off, 12 + gpdel, gpdel, | |
3159 | 8 + gpdel, 0, | |
3160 | (breg == 0 | |
3161 | ? mips_warn_about_macros | |
3162 | : 0)), | |
3163 | offset_expr.X_add_symbol, (long) 0, | |
3164 | (char *) NULL); | |
3165 | } | |
3166 | else if (expr1.X_add_number >= -0x8000 | |
3167 | && expr1.X_add_number < 0x8000) | |
3168 | { | |
3169 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3170 | "nop", ""); | |
3171 | macro_build ((char *) NULL, &icnt, &expr1, | |
3172 | mips_isa < 3 ? "addiu" : "daddiu", | |
3173 | "t,r,j", tempreg, tempreg, (int) BFD_RELOC_LO16); | |
3174 | ||
3175 | p = frag_var (rs_machine_dependent, 12 + gpdel, 0, | |
3176 | RELAX_ENCODE (20, 12 + gpdel, gpdel, 8 + gpdel, 0, | |
3177 | (breg == 0 | |
3178 | ? mips_warn_about_macros | |
3179 | : 0)), | |
3180 | offset_expr.X_add_symbol, (long) 0, | |
3181 | (char *) NULL); | |
3182 | } | |
3183 | else | |
3184 | { | |
3185 | int adj, dreg; | |
3186 | ||
3187 | /* If we are going to add in a base register, and the | |
3188 | target register and the base register are the same, | |
3189 | then we are using AT as a temporary register. Since | |
3190 | we want to load the constant into AT, we add our | |
3191 | current AT (from the global offset table) and the | |
3192 | register into the register now, and pretend we were | |
3193 | not using a base register. */ | |
3194 | if (breg != treg) | |
3195 | { | |
3196 | adj = 0; | |
3197 | dreg = tempreg; | |
3198 | } | |
3199 | else | |
3200 | { | |
3201 | assert (tempreg == AT); | |
3202 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3203 | "nop", ""); | |
3204 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3205 | mips_isa < 3 ? "addu" : "daddu", | |
3206 | "d,v,t", treg, AT, breg); | |
3207 | dreg = treg; | |
3208 | adj = 8; | |
3209 | } | |
3210 | ||
3211 | /* Set mips_optimize around the lui instruction to avoid | |
3212 | inserting an unnecessary nop after the lw. */ | |
3213 | hold_mips_optimize = mips_optimize; | |
3214 | mips_optimize = 2; | |
3215 | macro_build_lui ((char *) NULL, &icnt, &expr1, AT); | |
3216 | mips_optimize = hold_mips_optimize; | |
3217 | ||
3218 | macro_build ((char *) NULL, &icnt, &expr1, | |
3219 | mips_isa < 3 ? "addiu" : "daddiu", | |
3220 | "t,r,j", AT, AT, (int) BFD_RELOC_LO16); | |
3221 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3222 | mips_isa < 3 ? "addu" : "daddu", | |
3223 | "d,v,t", dreg, dreg, AT); | |
3224 | ||
3225 | p = frag_var (rs_machine_dependent, 16 + gpdel + adj, 0, | |
3226 | RELAX_ENCODE (24 + adj, 16 + gpdel + adj, gpdel, | |
3227 | 8 + gpdel, 0, | |
3228 | (breg == 0 | |
3229 | ? mips_warn_about_macros | |
3230 | : 0)), | |
3231 | offset_expr.X_add_symbol, (long) 0, | |
3232 | (char *) NULL); | |
3233 | ||
3234 | used_at = 1; | |
3235 | } | |
3236 | ||
3237 | if (gpdel > 0) | |
3238 | { | |
3239 | /* This is needed because this instruction uses $gp, but | |
3240 | the first instruction on the main stream does not. */ | |
3241 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
3242 | p += 4; | |
3243 | } | |
3244 | macro_build (p, &icnt, &offset_expr, | |
3245 | dbl ? "ld" : "lw", | |
3246 | "t,o(b)", tempreg, (int) BFD_RELOC_MIPS_GOT16, GP); | |
3247 | p += 4; | |
3248 | if (expr1.X_add_number >= -0x8000 | |
3249 | && expr1.X_add_number < 0x8000) | |
3250 | { | |
3251 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
3252 | p += 4; | |
3253 | macro_build (p, &icnt, &expr1, | |
3254 | mips_isa < 3 ? "addiu" : "daddiu", | |
3255 | "t,r,j", tempreg, tempreg, (int) BFD_RELOC_LO16); | |
3256 | /* FIXME: If add_number is 0, and there was no base | |
3257 | register, the external symbol case ended with a load, | |
3258 | so if the symbol turns out to not be external, and | |
3259 | the next instruction uses tempreg, an unnecessary nop | |
3260 | will be inserted. */ | |
3261 | } | |
3262 | else | |
3263 | { | |
3264 | if (breg == treg) | |
3265 | { | |
3266 | /* We must add in the base register now, as in the | |
3267 | external symbol case. */ | |
3268 | assert (tempreg == AT); | |
3269 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
3270 | p += 4; | |
3271 | macro_build (p, &icnt, (expressionS *) NULL, | |
3272 | mips_isa < 3 ? "addu" : "daddu", | |
3273 | "d,v,t", treg, AT, breg); | |
3274 | p += 4; | |
3275 | tempreg = treg; | |
3276 | /* We set breg to 0 because we have arranged to add | |
3277 | it in in both cases. */ | |
3278 | breg = 0; | |
3279 | } | |
3280 | ||
3281 | macro_build_lui (p, &icnt, &expr1, AT); | |
3282 | p += 4; | |
3283 | macro_build (p, &icnt, &expr1, | |
3284 | mips_isa < 3 ? "addiu" : "daddiu", | |
3285 | "t,r,j", AT, AT, (int) BFD_RELOC_LO16); | |
3286 | p += 4; | |
3287 | macro_build (p, &icnt, (expressionS *) NULL, | |
3288 | mips_isa < 3 ? "addu" : "daddu", | |
3289 | "d,v,t", tempreg, tempreg, AT); | |
3290 | p += 4; | |
3291 | } | |
3292 | } | |
d9aba805 ILT |
3293 | else if (mips_pic == EMBEDDED_PIC) |
3294 | { | |
3295 | /* We use | |
3296 | addiu $tempreg,$gp,<sym> (BFD_RELOC_MIPS_GPREL) | |
3297 | */ | |
3298 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
3299 | mips_isa < 3 ? "addiu" : "daddiu", | |
3300 | "t,r,j", tempreg, GP, (int) BFD_RELOC_MIPS_GPREL); | |
3301 | } | |
3302 | else | |
3303 | abort (); | |
0dd2d296 | 3304 | |
670a50eb | 3305 | if (breg != 0) |
0dd2d296 ILT |
3306 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, |
3307 | mips_isa < 3 ? "addu" : "daddu", | |
3308 | "d,v,t", treg, tempreg, breg); | |
3309 | ||
3310 | if (! used_at) | |
3311 | return; | |
3312 | ||
3313 | break; | |
3314 | ||
3315 | case M_J_A: | |
3316 | /* The j instruction may not be used in PIC code, since it | |
3317 | requires an absolute address. We convert it to a b | |
3318 | instruction. */ | |
d9aba805 | 3319 | if (mips_pic == NO_PIC) |
0dd2d296 ILT |
3320 | macro_build ((char *) NULL, &icnt, &offset_expr, "j", "a"); |
3321 | else | |
3322 | macro_build ((char *) NULL, &icnt, &offset_expr, "b", "p"); | |
670a50eb | 3323 | return; |
3d3c5039 | 3324 | |
9226253a ILT |
3325 | /* The jal instructions must be handled as macros because when |
3326 | generating PIC code they expand to multi-instruction | |
3327 | sequences. Normally they are simple instructions. */ | |
3328 | case M_JAL_1: | |
3329 | dreg = RA; | |
3330 | /* Fall through. */ | |
3331 | case M_JAL_2: | |
d9aba805 ILT |
3332 | if (mips_pic == NO_PIC |
3333 | || mips_pic == EMBEDDED_PIC) | |
3334 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, "jalr", | |
3335 | "d,s", dreg, sreg); | |
3336 | else if (mips_pic == SVR4_PIC) | |
9226253a | 3337 | { |
d9aba805 ILT |
3338 | if (sreg != PIC_CALL_REG) |
3339 | as_warn ("MIPS PIC call to register other than $25"); | |
3340 | ||
0dd2d296 ILT |
3341 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, "jalr", |
3342 | "d,s", dreg, sreg); | |
d9aba805 ILT |
3343 | if (mips_cprestore_offset < 0) |
3344 | as_warn ("No .cprestore pseudo-op used in PIC code"); | |
3345 | else | |
3346 | { | |
3347 | expr1.X_add_number = mips_cprestore_offset; | |
3348 | macro_build ((char *) NULL, &icnt, &expr1, | |
3349 | mips_isa < 3 ? "lw" : "ld", | |
3350 | "t,o(b)", GP, (int) BFD_RELOC_LO16, mips_frame_reg); | |
3351 | } | |
9226253a | 3352 | } |
0dd2d296 | 3353 | else |
d9aba805 ILT |
3354 | abort (); |
3355 | ||
9226253a ILT |
3356 | return; |
3357 | ||
3358 | case M_JAL_A: | |
d9aba805 ILT |
3359 | if (mips_pic == NO_PIC) |
3360 | macro_build ((char *) NULL, &icnt, &offset_expr, "jal", "a"); | |
3361 | else if (mips_pic == SVR4_PIC) | |
9226253a | 3362 | { |
fb251650 ILT |
3363 | /* If this is a reference to an external symbol, and we are |
3364 | using a small GOT, we want | |
d9aba805 ILT |
3365 | lw $25,<sym>($gp) (BFD_RELOC_MIPS_CALL16) |
3366 | nop | |
3367 | jalr $25 | |
3368 | nop | |
3369 | lw $gp,cprestore($sp) | |
3370 | The cprestore value is set using the .cprestore | |
fb251650 ILT |
3371 | pseudo-op. If we are using a big GOT, we want |
3372 | lui $25,<sym> (BFD_RELOC_MIPS_CALL_HI16) | |
3373 | addu $25,$25,$gp | |
3374 | lw $25,<sym>($25) (BFD_RELOC_MIPS_CALL_LO16) | |
3375 | nop | |
3376 | jalr $25 | |
3377 | nop | |
3378 | lw $gp,cprestore($sp) | |
3379 | If the symbol is not external, we want | |
d9aba805 ILT |
3380 | lw $25,<sym>($gp) (BFD_RELOC_MIPS_GOT16) |
3381 | nop | |
3382 | addiu $25,$25,<sym> (BFD_RELOC_LO16) | |
3383 | jalr $25 | |
3384 | nop | |
fb251650 ILT |
3385 | lw $gp,cprestore($sp) */ |
3386 | frag_grow (40); | |
3387 | if (! mips_big_got) | |
3388 | { | |
3389 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
3390 | mips_isa < 3 ? "lw" : "ld", | |
3391 | "t,o(b)", PIC_CALL_REG, | |
3392 | (int) BFD_RELOC_MIPS_CALL16, GP); | |
3393 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3394 | "nop", ""); | |
3395 | p = frag_var (rs_machine_dependent, 4, 0, | |
3396 | RELAX_ENCODE (0, 4, -8, 0, 0, 0), | |
3397 | offset_expr.X_add_symbol, (long) 0, (char *) NULL); | |
3398 | } | |
3399 | else | |
3400 | { | |
3401 | int gpdel; | |
3402 | ||
3403 | if (reg_needs_delay (GP)) | |
3404 | gpdel = 4; | |
3405 | else | |
3406 | gpdel = 0; | |
3407 | macro_build ((char *) NULL, &icnt, &offset_expr, "lui", "t,u", | |
3408 | PIC_CALL_REG, (int) BFD_RELOC_MIPS_CALL_HI16); | |
3409 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3410 | mips_isa < 3 ? "addu" : "daddu", | |
3411 | "d,v,t", PIC_CALL_REG, PIC_CALL_REG, GP); | |
3412 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
3413 | mips_isa < 3 ? "lw" : "ld", | |
3414 | "t,o(b)", PIC_CALL_REG, | |
3415 | (int) BFD_RELOC_MIPS_CALL_LO16, PIC_CALL_REG); | |
3416 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3417 | "nop", ""); | |
3418 | p = frag_var (rs_machine_dependent, 12 + gpdel, 0, | |
3419 | RELAX_ENCODE (16, 12 + gpdel, gpdel, 8 + gpdel, | |
3420 | 0, 0), | |
3421 | offset_expr.X_add_symbol, (long) 0, (char *) NULL); | |
3422 | if (gpdel > 0) | |
3423 | { | |
3424 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
3425 | p += 4; | |
3426 | } | |
3427 | macro_build (p, &icnt, &offset_expr, | |
3428 | mips_isa < 3 ? "lw" : "ld", | |
3429 | "t,o(b)", PIC_CALL_REG, | |
3430 | (int) BFD_RELOC_MIPS_GOT16, GP); | |
3431 | p += 4; | |
3432 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
3433 | p += 4; | |
3434 | } | |
d9aba805 ILT |
3435 | macro_build (p, &icnt, &offset_expr, |
3436 | mips_isa < 3 ? "addiu" : "daddiu", | |
3437 | "t,r,j", PIC_CALL_REG, PIC_CALL_REG, | |
3438 | (int) BFD_RELOC_LO16); | |
3439 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3440 | "jalr", "s", PIC_CALL_REG); | |
3441 | if (mips_cprestore_offset < 0) | |
3442 | as_warn ("No .cprestore pseudo-op used in PIC code"); | |
3443 | else | |
3444 | { | |
3445 | if (mips_noreorder) | |
3446 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3447 | "nop", ""); | |
3448 | expr1.X_add_number = mips_cprestore_offset; | |
3449 | macro_build ((char *) NULL, &icnt, &expr1, | |
3450 | mips_isa < 3 ? "lw" : "ld", | |
3451 | "t,o(b)", GP, (int) BFD_RELOC_LO16, | |
3452 | mips_frame_reg); | |
3453 | } | |
0dd2d296 | 3454 | } |
d9aba805 | 3455 | else if (mips_pic == EMBEDDED_PIC) |
5b63f465 ILT |
3456 | { |
3457 | macro_build ((char *) NULL, &icnt, &offset_expr, "bal", "p"); | |
3458 | /* The linker may expand the call to a longer sequence which | |
3459 | uses $at, so we must break rather than return. */ | |
3460 | break; | |
3461 | } | |
d9aba805 ILT |
3462 | else |
3463 | abort (); | |
3464 | ||
9226253a ILT |
3465 | return; |
3466 | ||
3d3c5039 | 3467 | case M_LB_AB: |
670a50eb ILT |
3468 | s = "lb"; |
3469 | goto ld; | |
3d3c5039 | 3470 | case M_LBU_AB: |
670a50eb ILT |
3471 | s = "lbu"; |
3472 | goto ld; | |
3d3c5039 | 3473 | case M_LH_AB: |
670a50eb ILT |
3474 | s = "lh"; |
3475 | goto ld; | |
3d3c5039 | 3476 | case M_LHU_AB: |
670a50eb ILT |
3477 | s = "lhu"; |
3478 | goto ld; | |
3d3c5039 | 3479 | case M_LW_AB: |
670a50eb ILT |
3480 | s = "lw"; |
3481 | goto ld; | |
3d3c5039 | 3482 | case M_LWC0_AB: |
670a50eb | 3483 | s = "lwc0"; |
8358c818 | 3484 | coproc = 1; |
670a50eb | 3485 | goto ld; |
3d3c5039 | 3486 | case M_LWC1_AB: |
670a50eb | 3487 | s = "lwc1"; |
8358c818 | 3488 | coproc = 1; |
670a50eb | 3489 | goto ld; |
3d3c5039 | 3490 | case M_LWC2_AB: |
670a50eb | 3491 | s = "lwc2"; |
8358c818 | 3492 | coproc = 1; |
670a50eb | 3493 | goto ld; |
3d3c5039 | 3494 | case M_LWC3_AB: |
670a50eb | 3495 | s = "lwc3"; |
8358c818 | 3496 | coproc = 1; |
670a50eb | 3497 | goto ld; |
3d3c5039 | 3498 | case M_LWL_AB: |
670a50eb | 3499 | s = "lwl"; |
b2b8c24e | 3500 | lr = 1; |
670a50eb | 3501 | goto ld; |
3d3c5039 | 3502 | case M_LWR_AB: |
670a50eb | 3503 | s = "lwr"; |
b2b8c24e | 3504 | lr = 1; |
8358c818 ILT |
3505 | goto ld; |
3506 | case M_LDC1_AB: | |
3507 | s = "ldc1"; | |
3508 | coproc = 1; | |
3509 | goto ld; | |
3510 | case M_LDC2_AB: | |
3511 | s = "ldc2"; | |
3512 | coproc = 1; | |
3513 | goto ld; | |
3514 | case M_LDC3_AB: | |
3515 | s = "ldc3"; | |
3516 | coproc = 1; | |
3517 | goto ld; | |
3518 | case M_LDL_AB: | |
3519 | s = "ldl"; | |
b2b8c24e | 3520 | lr = 1; |
8358c818 ILT |
3521 | goto ld; |
3522 | case M_LDR_AB: | |
3523 | s = "ldr"; | |
b2b8c24e | 3524 | lr = 1; |
8358c818 ILT |
3525 | goto ld; |
3526 | case M_LL_AB: | |
3527 | s = "ll"; | |
3528 | goto ld; | |
3529 | case M_LLD_AB: | |
3530 | s = "lld"; | |
3531 | goto ld; | |
3532 | case M_LWU_AB: | |
3533 | s = "lwu"; | |
3d3c5039 | 3534 | ld: |
b2b8c24e | 3535 | if (breg == treg || coproc || lr) |
670a50eb ILT |
3536 | { |
3537 | tempreg = AT; | |
3538 | used_at = 1; | |
3539 | } | |
3540 | else | |
3541 | { | |
3542 | tempreg = treg; | |
3543 | used_at = 0; | |
3544 | } | |
3545 | goto ld_st; | |
3d3c5039 | 3546 | case M_SB_AB: |
670a50eb ILT |
3547 | s = "sb"; |
3548 | goto st; | |
3d3c5039 | 3549 | case M_SH_AB: |
670a50eb ILT |
3550 | s = "sh"; |
3551 | goto st; | |
3d3c5039 | 3552 | case M_SW_AB: |
670a50eb ILT |
3553 | s = "sw"; |
3554 | goto st; | |
3d3c5039 | 3555 | case M_SWC0_AB: |
670a50eb | 3556 | s = "swc0"; |
8358c818 | 3557 | coproc = 1; |
670a50eb | 3558 | goto st; |
3d3c5039 | 3559 | case M_SWC1_AB: |
670a50eb | 3560 | s = "swc1"; |
8358c818 | 3561 | coproc = 1; |
670a50eb | 3562 | goto st; |
3d3c5039 | 3563 | case M_SWC2_AB: |
670a50eb | 3564 | s = "swc2"; |
8358c818 | 3565 | coproc = 1; |
670a50eb | 3566 | goto st; |
3d3c5039 | 3567 | case M_SWC3_AB: |
670a50eb | 3568 | s = "swc3"; |
8358c818 | 3569 | coproc = 1; |
670a50eb | 3570 | goto st; |
3d3c5039 | 3571 | case M_SWL_AB: |
670a50eb ILT |
3572 | s = "swl"; |
3573 | goto st; | |
3d3c5039 | 3574 | case M_SWR_AB: |
670a50eb | 3575 | s = "swr"; |
8358c818 ILT |
3576 | goto st; |
3577 | case M_SC_AB: | |
3578 | s = "sc"; | |
3579 | goto st; | |
3580 | case M_SCD_AB: | |
3581 | s = "scd"; | |
3582 | goto st; | |
3583 | case M_SDC1_AB: | |
3584 | s = "sdc1"; | |
3585 | coproc = 1; | |
3586 | goto st; | |
3587 | case M_SDC2_AB: | |
3588 | s = "sdc2"; | |
3589 | coproc = 1; | |
3590 | goto st; | |
3591 | case M_SDC3_AB: | |
3592 | s = "sdc3"; | |
3593 | coproc = 1; | |
3594 | goto st; | |
3595 | case M_SDL_AB: | |
3596 | s = "sdl"; | |
3597 | goto st; | |
3598 | case M_SDR_AB: | |
3599 | s = "sdr"; | |
3d3c5039 | 3600 | st: |
670a50eb ILT |
3601 | tempreg = AT; |
3602 | used_at = 1; | |
3d3c5039 | 3603 | ld_st: |
8358c818 ILT |
3604 | if (mask == M_LWC1_AB |
3605 | || mask == M_SWC1_AB | |
8358c818 | 3606 | || mask == M_LDC1_AB |
0dd2d296 ILT |
3607 | || mask == M_SDC1_AB |
3608 | || mask == M_L_DAB | |
3609 | || mask == M_S_DAB) | |
670a50eb | 3610 | fmt = "T,o(b)"; |
8358c818 | 3611 | else if (coproc) |
19ed8960 | 3612 | fmt = "E,o(b)"; |
670a50eb ILT |
3613 | else |
3614 | fmt = "t,o(b)"; | |
0dd2d296 ILT |
3615 | |
3616 | if (offset_expr.X_op != O_constant | |
3617 | && offset_expr.X_op != O_symbol) | |
3618 | { | |
3619 | as_bad ("expression too complex"); | |
3620 | offset_expr.X_op = O_constant; | |
3621 | } | |
3622 | ||
3623 | /* A constant expression in PIC code can be handled just as it | |
3624 | is in non PIC code. */ | |
d9aba805 | 3625 | if (mips_pic == NO_PIC |
0dd2d296 | 3626 | || offset_expr.X_op == O_constant) |
670a50eb | 3627 | { |
0dd2d296 ILT |
3628 | /* If this is a reference to a GP relative symbol, and there |
3629 | is no base register, we want | |
3630 | <op> $treg,<sym>($gp) (BFD_RELOC_MIPS_GPREL) | |
d9aba805 | 3631 | Otherwise, if there is no base register, we want |
0dd2d296 ILT |
3632 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) |
3633 | <op> $treg,<sym>($tempreg) (BFD_RELOC_LO16) | |
3634 | If we have a constant, we need two instructions anyhow, | |
3635 | so we always use the latter form. | |
3636 | ||
3637 | If we have a base register, and this is a reference to a | |
3638 | GP relative symbol, we want | |
3639 | addu $tempreg,$breg,$gp | |
3640 | <op> $treg,<sym>($tempreg) (BFD_RELOC_MIPS_GPREL) | |
3641 | Otherwise we want | |
3642 | lui $tempreg,<sym> (BFD_RELOC_HI16_S) | |
3643 | addu $tempreg,$tempreg,$breg | |
3644 | <op> $treg,<sym>($tempreg) (BFD_RELOC_LO16) | |
3645 | With a constant we always use the latter case. */ | |
670a50eb ILT |
3646 | if (breg == 0) |
3647 | { | |
7a15a226 | 3648 | if ((valueT) offset_expr.X_add_number >= MAX_GPREL_OFFSET |
d8a1c247 | 3649 | || nopic_need_relax (offset_expr.X_add_symbol)) |
0dd2d296 ILT |
3650 | p = NULL; |
3651 | else | |
3652 | { | |
8ea7f4e8 | 3653 | frag_grow (20); |
0dd2d296 ILT |
3654 | macro_build ((char *) NULL, &icnt, &offset_expr, s, fmt, |
3655 | treg, (int) BFD_RELOC_MIPS_GPREL, GP); | |
3656 | p = frag_var (rs_machine_dependent, 8, 0, | |
3657 | RELAX_ENCODE (4, 8, 0, 4, 0, | |
8197b589 ILT |
3658 | (mips_warn_about_macros |
3659 | || (used_at && mips_noat))), | |
0dd2d296 ILT |
3660 | offset_expr.X_add_symbol, (long) 0, |
3661 | (char *) NULL); | |
8197b589 | 3662 | used_at = 0; |
0dd2d296 ILT |
3663 | } |
3664 | macro_build_lui (p, &icnt, &offset_expr, tempreg); | |
3665 | if (p != NULL) | |
3666 | p += 4; | |
3667 | macro_build (p, &icnt, &offset_expr, s, fmt, treg, | |
3668 | (int) BFD_RELOC_LO16, tempreg); | |
3669 | } | |
3670 | else | |
3671 | { | |
7a15a226 | 3672 | if ((valueT) offset_expr.X_add_number >= MAX_GPREL_OFFSET |
d8a1c247 | 3673 | || nopic_need_relax (offset_expr.X_add_symbol)) |
0dd2d296 ILT |
3674 | p = NULL; |
3675 | else | |
3676 | { | |
8ea7f4e8 | 3677 | frag_grow (28); |
0dd2d296 ILT |
3678 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, |
3679 | mips_isa < 3 ? "addu" : "daddu", | |
3680 | "d,v,t", tempreg, breg, GP); | |
3681 | macro_build ((char *) NULL, &icnt, &offset_expr, s, fmt, | |
3682 | treg, (int) BFD_RELOC_MIPS_GPREL, tempreg); | |
3683 | p = frag_var (rs_machine_dependent, 12, 0, | |
3684 | RELAX_ENCODE (8, 12, 0, 8, 0, 0), | |
3685 | offset_expr.X_add_symbol, (long) 0, | |
3686 | (char *) NULL); | |
3687 | } | |
3688 | macro_build_lui (p, &icnt, &offset_expr, tempreg); | |
3689 | if (p != NULL) | |
3690 | p += 4; | |
3691 | macro_build (p, &icnt, (expressionS *) NULL, | |
3692 | mips_isa < 3 ? "addu" : "daddu", | |
3693 | "d,v,t", tempreg, tempreg, breg); | |
3694 | if (p != NULL) | |
3695 | p += 4; | |
3696 | macro_build (p, &icnt, &offset_expr, s, fmt, treg, | |
3697 | (int) BFD_RELOC_LO16, tempreg); | |
670a50eb | 3698 | } |
670a50eb | 3699 | } |
fb251650 | 3700 | else if (mips_pic == SVR4_PIC && ! mips_big_got) |
670a50eb | 3701 | { |
0dd2d296 ILT |
3702 | /* If this is a reference to an external symbol, we want |
3703 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
3704 | nop | |
3705 | <op> $treg,0($tempreg) | |
3706 | Otherwise we want | |
3707 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
3708 | nop | |
3709 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) | |
3710 | <op> $treg,0($tempreg) | |
3711 | If there is a base register, we add it to $tempreg before | |
3712 | the <op>. If there is a constant, we stick it in the | |
3713 | <op> instruction. We don't handle constants larger than | |
3714 | 16 bits, because we have no way to load the upper 16 bits | |
3715 | (actually, we could handle them for the subset of cases | |
3716 | in which we are not using $at). */ | |
3717 | assert (offset_expr.X_op == O_symbol); | |
3718 | expr1.X_add_number = offset_expr.X_add_number; | |
3719 | offset_expr.X_add_number = 0; | |
3720 | if (expr1.X_add_number < -0x8000 | |
3721 | || expr1.X_add_number >= 0x8000) | |
3722 | as_bad ("PIC code offset overflow (max 16 signed bits)"); | |
8ea7f4e8 | 3723 | frag_grow (20); |
0dd2d296 ILT |
3724 | macro_build ((char *) NULL, &icnt, &offset_expr, |
3725 | mips_isa < 3 ? "lw" : "ld", | |
3726 | "t,o(b)", tempreg, (int) BFD_RELOC_MIPS_GOT16, GP); | |
3727 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, "nop", ""); | |
3728 | p = frag_var (rs_machine_dependent, 4, 0, | |
3729 | RELAX_ENCODE (0, 4, -8, 0, 0, 0), | |
3730 | offset_expr.X_add_symbol, (long) 0, | |
3731 | (char *) NULL); | |
3732 | macro_build (p, &icnt, &offset_expr, | |
3733 | mips_isa < 3 ? "addiu" : "daddiu", | |
3734 | "t,r,j", tempreg, tempreg, (int) BFD_RELOC_LO16); | |
670a50eb | 3735 | if (breg != 0) |
0dd2d296 | 3736 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, |
6e8dda9c ILT |
3737 | mips_isa < 3 ? "addu" : "daddu", |
3738 | "d,v,t", tempreg, tempreg, breg); | |
0dd2d296 ILT |
3739 | macro_build ((char *) NULL, &icnt, &expr1, s, fmt, treg, |
3740 | (int) BFD_RELOC_LO16, tempreg); | |
670a50eb | 3741 | } |
fb251650 ILT |
3742 | else if (mips_pic == SVR4_PIC) |
3743 | { | |
3744 | int gpdel; | |
3745 | ||
3746 | /* If this is a reference to an external symbol, we want | |
3747 | lui $tempreg,<sym> (BFD_RELOC_MIPS_GOT_HI16) | |
3748 | addu $tempreg,$tempreg,$gp | |
3749 | lw $tempreg,<sym>($tempreg) (BFD_RELOC_MIPS_GOT_LO16) | |
3750 | <op> $treg,0($tempreg) | |
3751 | Otherwise we want | |
3752 | lw $tempreg,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
3753 | nop | |
3754 | addiu $tempreg,$tempreg,<sym> (BFD_RELOC_LO16) | |
3755 | <op> $treg,0($tempreg) | |
3756 | If there is a base register, we add it to $tempreg before | |
3757 | the <op>. If there is a constant, we stick it in the | |
3758 | <op> instruction. We don't handle constants larger than | |
3759 | 16 bits, because we have no way to load the upper 16 bits | |
3760 | (actually, we could handle them for the subset of cases | |
3761 | in which we are not using $at). */ | |
3762 | assert (offset_expr.X_op == O_symbol); | |
3763 | expr1.X_add_number = offset_expr.X_add_number; | |
3764 | offset_expr.X_add_number = 0; | |
3765 | if (expr1.X_add_number < -0x8000 | |
3766 | || expr1.X_add_number >= 0x8000) | |
3767 | as_bad ("PIC code offset overflow (max 16 signed bits)"); | |
3768 | if (reg_needs_delay (GP)) | |
3769 | gpdel = 4; | |
3770 | else | |
3771 | gpdel = 0; | |
3772 | frag_grow (36); | |
3773 | macro_build ((char *) NULL, &icnt, &offset_expr, "lui", "t,u", | |
3774 | tempreg, (int) BFD_RELOC_MIPS_GOT_HI16); | |
3775 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3776 | mips_isa < 3 ? "addu" : "daddu", | |
3777 | "d,v,t", tempreg, tempreg, GP); | |
3778 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
3779 | mips_isa < 3 ? "lw" : "ld", | |
867a58b3 ILT |
3780 | "t,o(b)", tempreg, (int) BFD_RELOC_MIPS_GOT_LO16, |
3781 | tempreg); | |
fb251650 ILT |
3782 | p = frag_var (rs_machine_dependent, 12 + gpdel, 0, |
3783 | RELAX_ENCODE (12, 12 + gpdel, gpdel, 8 + gpdel, 0, 0), | |
3784 | offset_expr.X_add_symbol, (long) 0, (char *) NULL); | |
3785 | if (gpdel > 0) | |
3786 | { | |
3787 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
3788 | p += 4; | |
3789 | } | |
3790 | macro_build (p, &icnt, &offset_expr, | |
3791 | mips_isa < 3 ? "lw" : "ld", | |
867a58b3 | 3792 | "t,o(b)", tempreg, (int) BFD_RELOC_MIPS_GOT16, GP); |
fb251650 ILT |
3793 | p += 4; |
3794 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
3795 | p += 4; | |
3796 | macro_build (p, &icnt, &offset_expr, | |
3797 | mips_isa < 3 ? "addiu" : "daddiu", | |
3798 | "t,r,j", tempreg, tempreg, (int) BFD_RELOC_LO16); | |
3799 | if (breg != 0) | |
3800 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3801 | mips_isa < 3 ? "addu" : "daddu", | |
3802 | "d,v,t", tempreg, tempreg, breg); | |
3803 | macro_build ((char *) NULL, &icnt, &expr1, s, fmt, treg, | |
3804 | (int) BFD_RELOC_LO16, tempreg); | |
3805 | } | |
d9aba805 ILT |
3806 | else if (mips_pic == EMBEDDED_PIC) |
3807 | { | |
3808 | /* If there is no base register, we want | |
3809 | <op> $treg,<sym>($gp) (BFD_RELOC_MIPS_GPREL) | |
3810 | If there is a base register, we want | |
3811 | addu $tempreg,$breg,$gp | |
3812 | <op> $treg,<sym>($tempreg) (BFD_RELOC_MIPS_GPREL) | |
3813 | */ | |
3814 | assert (offset_expr.X_op == O_symbol); | |
3815 | if (breg == 0) | |
3816 | { | |
3817 | macro_build ((char *) NULL, &icnt, &offset_expr, s, fmt, | |
3818 | treg, (int) BFD_RELOC_MIPS_GPREL, GP); | |
3819 | used_at = 0; | |
3820 | } | |
3821 | else | |
3822 | { | |
3823 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
3824 | mips_isa < 3 ? "addu" : "daddu", | |
3825 | "d,v,t", tempreg, breg, GP); | |
3826 | macro_build ((char *) NULL, &icnt, &offset_expr, s, fmt, | |
3827 | treg, (int) BFD_RELOC_MIPS_GPREL, tempreg); | |
3828 | } | |
3829 | } | |
3830 | else | |
3831 | abort (); | |
0dd2d296 ILT |
3832 | |
3833 | if (! used_at) | |
3834 | return; | |
3835 | ||
3836 | break; | |
3d3c5039 ILT |
3837 | |
3838 | case M_LI: | |
19ed8960 | 3839 | case M_LI_S: |
d8a1c247 KR |
3840 | load_register (&icnt, treg, &imm_expr, 0); |
3841 | return; | |
3842 | ||
3843 | case M_DLI: | |
3844 | load_register (&icnt, treg, &imm_expr, 1); | |
670a50eb | 3845 | return; |
3d3c5039 | 3846 | |
0dd2d296 | 3847 | case M_LI_SS: |
55933a58 | 3848 | if (imm_expr.X_op == O_constant) |
0dd2d296 | 3849 | { |
d8a1c247 | 3850 | load_register (&icnt, AT, &imm_expr, 0); |
d2c71068 ILT |
3851 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, |
3852 | "mtc1", "t,G", AT, treg); | |
3853 | break; | |
0dd2d296 | 3854 | } |
d9aba805 | 3855 | else |
d2c71068 | 3856 | { |
55933a58 ILT |
3857 | assert (offset_expr.X_op == O_symbol |
3858 | && strcmp (segment_name (S_GET_SEGMENT | |
3859 | (offset_expr.X_add_symbol)), | |
3860 | ".lit4") == 0 | |
3861 | && offset_expr.X_add_number == 0); | |
3862 | macro_build ((char *) NULL, &icnt, &offset_expr, "lwc1", "T,o(b)", | |
3863 | treg, (int) BFD_RELOC_MIPS_LITERAL, GP); | |
d2c71068 ILT |
3864 | return; |
3865 | } | |
0dd2d296 | 3866 | |
3d3c5039 | 3867 | case M_LI_D: |
d9aba805 ILT |
3868 | /* We know that sym is in the .rdata section. First we get the |
3869 | upper 16 bits of the address. */ | |
3870 | if (mips_pic == NO_PIC) | |
0dd2d296 ILT |
3871 | { |
3872 | /* FIXME: This won't work for a 64 bit address. */ | |
3873 | macro_build_lui ((char *) NULL, &icnt, &offset_expr, AT); | |
3874 | } | |
d9aba805 | 3875 | else if (mips_pic == SVR4_PIC) |
0dd2d296 ILT |
3876 | { |
3877 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
3878 | mips_isa < 3 ? "lw" : "ld", | |
3879 | "t,o(b)", AT, (int) BFD_RELOC_MIPS_GOT16, GP); | |
3880 | } | |
d9aba805 ILT |
3881 | else if (mips_pic == EMBEDDED_PIC) |
3882 | { | |
3883 | /* For embedded PIC we pick up the entire address off $gp in | |
3884 | a single instruction. */ | |
3885 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
3886 | mips_isa < 3 ? "addiu" : "daddiu", | |
3887 | "t,r,j", AT, GP, (int) BFD_RELOC_MIPS_GPREL); | |
3888 | offset_expr.X_op = O_constant; | |
3889 | offset_expr.X_add_number = 0; | |
3890 | } | |
3891 | else | |
3892 | abort (); | |
3893 | ||
0dd2d296 | 3894 | /* Now we load the register(s). */ |
8358c818 | 3895 | if (mips_isa >= 3) |
0dd2d296 ILT |
3896 | macro_build ((char *) NULL, &icnt, &offset_expr, "ld", "t,o(b)", |
3897 | treg, (int) BFD_RELOC_LO16, AT); | |
8358c818 ILT |
3898 | else |
3899 | { | |
0dd2d296 ILT |
3900 | macro_build ((char *) NULL, &icnt, &offset_expr, "lw", "t,o(b)", |
3901 | treg, (int) BFD_RELOC_LO16, AT); | |
3902 | if (treg != 31) | |
3903 | { | |
3904 | /* FIXME: How in the world do we deal with the possible | |
3905 | overflow here? */ | |
3906 | offset_expr.X_add_number += 4; | |
3907 | macro_build ((char *) NULL, &icnt, &offset_expr, "lw", "t,o(b)", | |
3908 | treg + 1, (int) BFD_RELOC_LO16, AT); | |
3909 | } | |
8358c818 | 3910 | } |
d2c71068 ILT |
3911 | |
3912 | /* To avoid confusion in tc_gen_reloc, we must ensure that this | |
3913 | does not become a variant frag. */ | |
3914 | frag_wane (frag_now); | |
3915 | frag_new (0); | |
3916 | ||
670a50eb | 3917 | break; |
3d3c5039 ILT |
3918 | |
3919 | case M_LI_DD: | |
55933a58 ILT |
3920 | assert (offset_expr.X_op == O_symbol |
3921 | && offset_expr.X_add_number == 0); | |
3922 | s = segment_name (S_GET_SEGMENT (offset_expr.X_add_symbol)); | |
3923 | if (strcmp (s, ".lit8") == 0) | |
8358c818 | 3924 | { |
0dd2d296 ILT |
3925 | if (mips_isa >= 2) |
3926 | { | |
3927 | macro_build ((char *) NULL, &icnt, &offset_expr, "ldc1", | |
3928 | "T,o(b)", treg, (int) BFD_RELOC_MIPS_LITERAL, GP); | |
3929 | return; | |
3930 | } | |
3931 | breg = GP; | |
3932 | r = BFD_RELOC_MIPS_LITERAL; | |
3933 | goto dob; | |
3934 | } | |
55933a58 | 3935 | else |
0dd2d296 | 3936 | { |
55933a58 ILT |
3937 | assert (strcmp (s, RDATA_SECTION_NAME) == 0); |
3938 | if (mips_pic == SVR4_PIC) | |
3939 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
3940 | mips_isa < 3 ? "lw" : "ld", | |
3941 | "t,o(b)", AT, (int) BFD_RELOC_MIPS_GOT16, GP); | |
3942 | else | |
3943 | { | |
3944 | /* FIXME: This won't work for a 64 bit address. */ | |
3945 | macro_build_lui ((char *) NULL, &icnt, &offset_expr, AT); | |
3946 | } | |
3947 | ||
0dd2d296 ILT |
3948 | if (mips_isa >= 2) |
3949 | { | |
3950 | macro_build ((char *) NULL, &icnt, &offset_expr, "ldc1", | |
55933a58 | 3951 | "T,o(b)", treg, (int) BFD_RELOC_LO16, AT); |
94b68f04 ILT |
3952 | |
3953 | /* To avoid confusion in tc_gen_reloc, we must ensure | |
3954 | that this does not become a variant frag. */ | |
3955 | frag_wane (frag_now); | |
3956 | frag_new (0); | |
3957 | ||
0dd2d296 ILT |
3958 | break; |
3959 | } | |
3960 | breg = AT; | |
3961 | r = BFD_RELOC_LO16; | |
3962 | goto dob; | |
8358c818 | 3963 | } |
9226253a | 3964 | |
3d3c5039 | 3965 | case M_L_DOB: |
9a7d824a ILT |
3966 | /* Even on a big endian machine $fn comes before $fn+1. We have |
3967 | to adjust when loading from memory. */ | |
9226253a ILT |
3968 | r = BFD_RELOC_LO16; |
3969 | dob: | |
8358c818 | 3970 | assert (mips_isa < 2); |
0dd2d296 | 3971 | macro_build ((char *) NULL, &icnt, &offset_expr, "lwc1", "T,o(b)", |
9a7d824a | 3972 | byte_order == LITTLE_ENDIAN ? treg : treg + 1, |
9226253a | 3973 | (int) r, breg); |
0dd2d296 ILT |
3974 | /* FIXME: A possible overflow which I don't know how to deal |
3975 | with. */ | |
670a50eb | 3976 | offset_expr.X_add_number += 4; |
0dd2d296 | 3977 | macro_build ((char *) NULL, &icnt, &offset_expr, "lwc1", "T,o(b)", |
9a7d824a | 3978 | byte_order == LITTLE_ENDIAN ? treg + 1 : treg, |
9226253a | 3979 | (int) r, breg); |
d2c71068 ILT |
3980 | |
3981 | /* To avoid confusion in tc_gen_reloc, we must ensure that this | |
3982 | does not become a variant frag. */ | |
3983 | frag_wane (frag_now); | |
3984 | frag_new (0); | |
3985 | ||
0dd2d296 ILT |
3986 | if (breg != AT) |
3987 | return; | |
3988 | break; | |
3d3c5039 ILT |
3989 | |
3990 | case M_L_DAB: | |
670a50eb ILT |
3991 | /* |
3992 | * The MIPS assembler seems to check for X_add_number not | |
3993 | * being double aligned and generating: | |
3994 | * lui at,%hi(foo+1) | |
3995 | * addu at,at,v1 | |
3996 | * addiu at,at,%lo(foo+1) | |
3997 | * lwc1 f2,0(at) | |
3998 | * lwc1 f3,4(at) | |
3999 | * But, the resulting address is the same after relocation so why | |
4000 | * generate the extra instruction? | |
4001 | */ | |
4032d3f0 | 4002 | coproc = 1; |
0dd2d296 | 4003 | if (mips_isa >= 2) |
670a50eb | 4004 | { |
0dd2d296 ILT |
4005 | s = "ldc1"; |
4006 | goto ld; | |
670a50eb | 4007 | } |
0dd2d296 ILT |
4008 | |
4009 | s = "lwc1"; | |
4010 | fmt = "T,o(b)"; | |
0dd2d296 ILT |
4011 | goto ldd_std; |
4012 | ||
4013 | case M_S_DAB: | |
8358c818 | 4014 | if (mips_isa >= 2) |
8358c818 | 4015 | { |
0dd2d296 ILT |
4016 | s = "sdc1"; |
4017 | goto st; | |
8358c818 | 4018 | } |
3d3c5039 | 4019 | |
0dd2d296 ILT |
4020 | s = "swc1"; |
4021 | fmt = "T,o(b)"; | |
4022 | coproc = 1; | |
4023 | goto ldd_std; | |
3d3c5039 ILT |
4024 | |
4025 | case M_LD_AB: | |
0dd2d296 | 4026 | if (mips_isa >= 3) |
670a50eb | 4027 | { |
0dd2d296 ILT |
4028 | s = "ld"; |
4029 | goto ld; | |
670a50eb | 4030 | } |
0dd2d296 ILT |
4031 | |
4032 | s = "lw"; | |
4033 | fmt = "t,o(b)"; | |
4034 | goto ldd_std; | |
4035 | ||
4036 | case M_SD_AB: | |
4037 | if (mips_isa >= 3) | |
670a50eb | 4038 | { |
0dd2d296 ILT |
4039 | s = "sd"; |
4040 | goto st; | |
670a50eb | 4041 | } |
0dd2d296 | 4042 | |
670a50eb | 4043 | s = "sw"; |
0dd2d296 ILT |
4044 | fmt = "t,o(b)"; |
4045 | ||
4046 | ldd_std: | |
4047 | if (offset_expr.X_op != O_symbol | |
4048 | && offset_expr.X_op != O_constant) | |
670a50eb | 4049 | { |
0dd2d296 ILT |
4050 | as_bad ("expression too complex"); |
4051 | offset_expr.X_op = O_constant; | |
4052 | } | |
4053 | ||
4054 | /* Even on a big endian machine $fn comes before $fn+1. We have | |
4055 | to adjust when loading from memory. We set coproc if we must | |
4056 | load $fn+1 first. */ | |
4057 | if (byte_order == LITTLE_ENDIAN) | |
4058 | coproc = 0; | |
4059 | ||
d9aba805 | 4060 | if (mips_pic == NO_PIC |
0dd2d296 ILT |
4061 | || offset_expr.X_op == O_constant) |
4062 | { | |
4063 | /* If this is a reference to a GP relative symbol, we want | |
4064 | <op> $treg,<sym>($gp) (BFD_RELOC_MIPS_GPREL) | |
4065 | <op> $treg+1,<sym>+4($gp) (BFD_RELOC_MIPS_GPREL) | |
4066 | If we have a base register, we use this | |
4067 | addu $at,$breg,$gp | |
4068 | <op> $treg,<sym>($at) (BFD_RELOC_MIPS_GPREL) | |
4069 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_MIPS_GPREL) | |
4070 | If this is not a GP relative symbol, we want | |
4071 | lui $at,<sym> (BFD_RELOC_HI16_S) | |
4072 | <op> $treg,<sym>($at) (BFD_RELOC_LO16) | |
4073 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_LO16) | |
4074 | If there is a base register, we add it to $at after the | |
4075 | lui instruction. If there is a constant, we always use | |
4076 | the last case. */ | |
7a15a226 | 4077 | if ((valueT) offset_expr.X_add_number >= MAX_GPREL_OFFSET |
d8a1c247 | 4078 | || nopic_need_relax (offset_expr.X_add_symbol)) |
670a50eb | 4079 | { |
0dd2d296 ILT |
4080 | p = NULL; |
4081 | used_at = 1; | |
670a50eb ILT |
4082 | } |
4083 | else | |
0dd2d296 ILT |
4084 | { |
4085 | int off; | |
4086 | ||
4087 | if (breg == 0) | |
4088 | { | |
8ea7f4e8 | 4089 | frag_grow (28); |
0dd2d296 ILT |
4090 | tempreg = GP; |
4091 | off = 0; | |
4092 | used_at = 0; | |
4093 | } | |
4094 | else | |
4095 | { | |
8ea7f4e8 | 4096 | frag_grow (36); |
0dd2d296 ILT |
4097 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, |
4098 | mips_isa < 3 ? "addu" : "daddu", | |
4099 | "d,v,t", AT, breg, GP); | |
4100 | tempreg = AT; | |
4101 | off = 4; | |
4102 | used_at = 1; | |
4103 | } | |
4104 | ||
4105 | macro_build ((char *) NULL, &icnt, &offset_expr, s, fmt, | |
4106 | coproc ? treg + 1 : treg, | |
4107 | (int) BFD_RELOC_MIPS_GPREL, tempreg); | |
4108 | offset_expr.X_add_number += 4; | |
55933a58 ILT |
4109 | |
4110 | /* Set mips_optimize to 2 to avoid inserting an | |
4111 | undesired nop. */ | |
4112 | hold_mips_optimize = mips_optimize; | |
4113 | mips_optimize = 2; | |
0dd2d296 ILT |
4114 | macro_build ((char *) NULL, &icnt, &offset_expr, s, fmt, |
4115 | coproc ? treg : treg + 1, | |
4116 | (int) BFD_RELOC_MIPS_GPREL, tempreg); | |
55933a58 ILT |
4117 | mips_optimize = hold_mips_optimize; |
4118 | ||
0dd2d296 ILT |
4119 | p = frag_var (rs_machine_dependent, 12 + off, 0, |
4120 | RELAX_ENCODE (8 + off, 12 + off, 0, 4 + off, 1, | |
8197b589 | 4121 | used_at && mips_noat), |
0dd2d296 ILT |
4122 | offset_expr.X_add_symbol, (long) 0, |
4123 | (char *) NULL); | |
777ad64d ILT |
4124 | |
4125 | /* We just generated two relocs. When tc_gen_reloc | |
4126 | handles this case, it will skip the first reloc and | |
4127 | handle the second. The second reloc already has an | |
4128 | extra addend of 4, which we added above. We must | |
4129 | subtract it out, and then subtract another 4 to make | |
4130 | the first reloc come out right. The second reloc | |
4131 | will come out right because we are going to add 4 to | |
4132 | offset_expr when we build its instruction below. */ | |
4133 | offset_expr.X_add_number -= 8; | |
0dd2d296 ILT |
4134 | offset_expr.X_op = O_constant; |
4135 | } | |
4136 | macro_build_lui (p, &icnt, &offset_expr, AT); | |
4137 | if (p != NULL) | |
4138 | p += 4; | |
4139 | if (breg != 0) | |
4140 | { | |
4141 | macro_build (p, &icnt, (expressionS *) NULL, | |
4142 | mips_isa < 3 ? "addu" : "daddu", | |
4143 | "d,v,t", AT, breg, AT); | |
4144 | if (p != NULL) | |
4145 | p += 4; | |
4146 | } | |
4147 | macro_build (p, &icnt, &offset_expr, s, fmt, | |
4148 | coproc ? treg + 1 : treg, | |
4149 | (int) BFD_RELOC_LO16, AT); | |
4150 | if (p != NULL) | |
4151 | p += 4; | |
4152 | /* FIXME: How do we handle overflow here? */ | |
4153 | offset_expr.X_add_number += 4; | |
4154 | macro_build (p, &icnt, &offset_expr, s, fmt, | |
4155 | coproc ? treg : treg + 1, | |
4156 | (int) BFD_RELOC_LO16, AT); | |
4157 | } | |
fb251650 | 4158 | else if (mips_pic == SVR4_PIC && ! mips_big_got) |
670a50eb | 4159 | { |
0dd2d296 ILT |
4160 | int off; |
4161 | ||
4162 | /* If this is a reference to an external symbol, we want | |
4163 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
4164 | nop | |
4165 | <op> $treg,0($at) | |
4166 | <op> $treg+1,4($at) | |
4167 | Otherwise we want | |
4168 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
4169 | nop | |
4170 | <op> $treg,<sym>($at) (BFD_RELOC_LO16) | |
4171 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_LO16) | |
4172 | If there is a base register we add it to $at before the | |
4173 | lwc1 instructions. If there is a constant we include it | |
4174 | in the lwc1 instructions. */ | |
4175 | used_at = 1; | |
4176 | expr1.X_add_number = offset_expr.X_add_number; | |
4177 | offset_expr.X_add_number = 0; | |
4178 | if (expr1.X_add_number < -0x8000 | |
4179 | || expr1.X_add_number >= 0x8000 - 4) | |
4180 | as_bad ("PIC code offset overflow (max 16 signed bits)"); | |
4181 | if (breg == 0) | |
4182 | off = 0; | |
4183 | else | |
4184 | off = 4; | |
8ea7f4e8 | 4185 | frag_grow (24 + off); |
0dd2d296 ILT |
4186 | macro_build ((char *) NULL, &icnt, &offset_expr, |
4187 | mips_isa < 3 ? "lw" : "ld", | |
4188 | "t,o(b)", AT, (int) BFD_RELOC_MIPS_GOT16, GP); | |
4189 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, "nop", ""); | |
670a50eb | 4190 | if (breg != 0) |
0dd2d296 | 4191 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, |
6e8dda9c | 4192 | mips_isa < 3 ? "addu" : "daddu", |
0dd2d296 ILT |
4193 | "d,v,t", AT, breg, AT); |
4194 | macro_build ((char *) NULL, &icnt, &expr1, s, fmt, | |
4195 | coproc ? treg + 1 : treg, | |
4196 | (int) BFD_RELOC_LO16, AT); | |
4197 | expr1.X_add_number += 4; | |
55933a58 ILT |
4198 | |
4199 | /* Set mips_optimize to 2 to avoid inserting an undesired | |
4200 | nop. */ | |
4201 | hold_mips_optimize = mips_optimize; | |
4202 | mips_optimize = 2; | |
0dd2d296 ILT |
4203 | macro_build ((char *) NULL, &icnt, &expr1, s, fmt, |
4204 | coproc ? treg : treg + 1, | |
4205 | (int) BFD_RELOC_LO16, AT); | |
55933a58 ILT |
4206 | mips_optimize = hold_mips_optimize; |
4207 | ||
0dd2d296 ILT |
4208 | (void) frag_var (rs_machine_dependent, 0, 0, |
4209 | RELAX_ENCODE (0, 0, -16 - off, -8, 1, 0), | |
4210 | offset_expr.X_add_symbol, (long) 0, | |
4211 | (char *) NULL); | |
8358c818 | 4212 | } |
fb251650 ILT |
4213 | else if (mips_pic == SVR4_PIC) |
4214 | { | |
4215 | int gpdel, off; | |
4216 | ||
4217 | /* If this is a reference to an external symbol, we want | |
4218 | lui $at,<sym> (BFD_RELOC_MIPS_GOT_HI16) | |
4219 | addu $at,$at,$gp | |
4220 | lw $at,<sym>($at) (BFD_RELOC_MIPS_GOT_LO16) | |
4221 | nop | |
4222 | <op> $treg,0($at) | |
4223 | <op> $treg+1,4($at) | |
4224 | Otherwise we want | |
4225 | lw $at,<sym>($gp) (BFD_RELOC_MIPS_GOT16) | |
4226 | nop | |
4227 | <op> $treg,<sym>($at) (BFD_RELOC_LO16) | |
4228 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_LO16) | |
4229 | If there is a base register we add it to $at before the | |
4230 | lwc1 instructions. If there is a constant we include it | |
4231 | in the lwc1 instructions. */ | |
4232 | used_at = 1; | |
4233 | expr1.X_add_number = offset_expr.X_add_number; | |
4234 | offset_expr.X_add_number = 0; | |
4235 | if (expr1.X_add_number < -0x8000 | |
4236 | || expr1.X_add_number >= 0x8000 - 4) | |
4237 | as_bad ("PIC code offset overflow (max 16 signed bits)"); | |
4238 | if (reg_needs_delay (GP)) | |
4239 | gpdel = 4; | |
4240 | else | |
4241 | gpdel = 0; | |
4242 | if (breg == 0) | |
4243 | off = 0; | |
4244 | else | |
4245 | off = 4; | |
4246 | frag_grow (56); | |
4247 | macro_build ((char *) NULL, &icnt, &offset_expr, "lui", "t,u", | |
4248 | AT, (int) BFD_RELOC_MIPS_GOT_HI16); | |
4249 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
4250 | mips_isa < 3 ? "addu" : "daddu", | |
4251 | "d,v,t", AT, AT, GP); | |
4252 | macro_build ((char *) NULL, &icnt, &offset_expr, | |
4253 | mips_isa < 3 ? "lw" : "ld", | |
4254 | "t,o(b)", AT, (int) BFD_RELOC_MIPS_GOT_LO16, AT); | |
4255 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, "nop", ""); | |
4256 | if (breg != 0) | |
4257 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
4258 | mips_isa < 3 ? "addu" : "daddu", | |
4259 | "d,v,t", AT, breg, AT); | |
4260 | macro_build ((char *) NULL, &icnt, &expr1, s, fmt, | |
4261 | coproc ? treg + 1 : treg, | |
4262 | (int) BFD_RELOC_LO16, AT); | |
4263 | expr1.X_add_number += 4; | |
4264 | ||
4265 | /* Set mips_optimize to 2 to avoid inserting an undesired | |
4266 | nop. */ | |
4267 | hold_mips_optimize = mips_optimize; | |
4268 | mips_optimize = 2; | |
4269 | macro_build ((char *) NULL, &icnt, &expr1, s, fmt, | |
4270 | coproc ? treg : treg + 1, | |
4271 | (int) BFD_RELOC_LO16, AT); | |
4272 | mips_optimize = hold_mips_optimize; | |
4273 | expr1.X_add_number -= 4; | |
4274 | ||
4275 | p = frag_var (rs_machine_dependent, 16 + gpdel + off, 0, | |
4276 | RELAX_ENCODE (24 + off, 16 + gpdel + off, gpdel, | |
4277 | 8 + gpdel + off, 1, 0), | |
4278 | offset_expr.X_add_symbol, (long) 0, | |
4279 | (char *) NULL); | |
4280 | if (gpdel > 0) | |
4281 | { | |
4282 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
4283 | p += 4; | |
4284 | } | |
4285 | macro_build (p, &icnt, &offset_expr, | |
4286 | mips_isa < 3 ? "lw" : "ld", | |
4287 | "t,o(b)", AT, (int) BFD_RELOC_MIPS_GOT16, GP); | |
4288 | p += 4; | |
4289 | macro_build (p, &icnt, (expressionS *) NULL, "nop", ""); | |
4290 | p += 4; | |
4291 | if (breg != 0) | |
4292 | { | |
4293 | macro_build (p, &icnt, (expressionS *) NULL, | |
4294 | mips_isa < 3 ? "addu" : "daddu", | |
4295 | "d,v,t", AT, breg, AT); | |
4296 | p += 4; | |
4297 | } | |
4298 | macro_build (p, &icnt, &expr1, s, fmt, | |
4299 | coproc ? treg + 1 : treg, | |
4300 | (int) BFD_RELOC_LO16, AT); | |
4301 | p += 4; | |
4302 | expr1.X_add_number += 4; | |
4303 | ||
4304 | /* Set mips_optimize to 2 to avoid inserting an undesired | |
4305 | nop. */ | |
4306 | hold_mips_optimize = mips_optimize; | |
4307 | mips_optimize = 2; | |
4308 | macro_build (p, &icnt, &expr1, s, fmt, | |
4309 | coproc ? treg : treg + 1, | |
4310 | (int) BFD_RELOC_LO16, AT); | |
4311 | mips_optimize = hold_mips_optimize; | |
4312 | } | |
d9aba805 ILT |
4313 | else if (mips_pic == EMBEDDED_PIC) |
4314 | { | |
4315 | /* If there is no base register, we use | |
4316 | <op> $treg,<sym>($gp) (BFD_RELOC_MIPS_GPREL) | |
4317 | <op> $treg+1,<sym>+4($gp) (BFD_RELOC_MIPS_GPREL) | |
4318 | If we have a base register, we use | |
4319 | addu $at,$breg,$gp | |
4320 | <op> $treg,<sym>($at) (BFD_RELOC_MIPS_GPREL) | |
4321 | <op> $treg+1,<sym>+4($at) (BFD_RELOC_MIPS_GPREL) | |
4322 | */ | |
4323 | if (breg == 0) | |
4324 | { | |
4325 | tempreg = GP; | |
4326 | used_at = 0; | |
4327 | } | |
4328 | else | |
4329 | { | |
4330 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
4331 | mips_isa < 3 ? "addu" : "daddu", | |
4332 | "d,v,t", AT, breg, GP); | |
4333 | tempreg = AT; | |
4334 | used_at = 1; | |
4335 | } | |
4336 | ||
4337 | macro_build ((char *) NULL, &icnt, &offset_expr, s, fmt, | |
4338 | coproc ? treg + 1 : treg, | |
4339 | (int) BFD_RELOC_MIPS_GPREL, tempreg); | |
4340 | offset_expr.X_add_number += 4; | |
4341 | macro_build ((char *) NULL, &icnt, &offset_expr, s, fmt, | |
4342 | coproc ? treg : treg + 1, | |
4343 | (int) BFD_RELOC_MIPS_GPREL, tempreg); | |
4344 | } | |
4345 | else | |
4346 | abort (); | |
0dd2d296 ILT |
4347 | |
4348 | if (! used_at) | |
4349 | return; | |
4350 | ||
4351 | break; | |
4352 | ||
4353 | case M_LD_OB: | |
4354 | s = "lw"; | |
4355 | goto sd_ob; | |
4356 | case M_SD_OB: | |
4357 | s = "sw"; | |
4358 | sd_ob: | |
4359 | assert (mips_isa < 3); | |
4360 | macro_build ((char *) NULL, &icnt, &offset_expr, s, "t,o(b)", treg, | |
4361 | (int) BFD_RELOC_LO16, breg); | |
4362 | offset_expr.X_add_number += 4; | |
4363 | macro_build ((char *) NULL, &icnt, &offset_expr, s, "t,o(b)", treg + 1, | |
4364 | (int) BFD_RELOC_LO16, breg); | |
670a50eb | 4365 | return; |
917fae09 SS |
4366 | #ifdef LOSING_COMPILER |
4367 | default: | |
4368 | macro2 (ip); | |
4369 | return; | |
4370 | } | |
4371 | if (mips_noat) | |
4372 | as_warn ("Macro used $at after \".set noat\""); | |
4373 | } | |
4374 | ||
4375 | static void | |
4376 | macro2 (ip) | |
4377 | struct mips_cl_insn *ip; | |
4378 | { | |
4379 | register int treg, sreg, dreg, breg; | |
4380 | int tempreg; | |
4381 | int mask; | |
4382 | int icnt = 0; | |
4383 | int used_at; | |
4384 | expressionS expr1; | |
4385 | const char *s; | |
4386 | const char *s2; | |
4387 | const char *fmt; | |
4388 | int likely = 0; | |
4389 | int dbl = 0; | |
4390 | int coproc = 0; | |
adcf2b9d ILT |
4391 | int lr = 0; |
4392 | int off; | |
917fae09 SS |
4393 | offsetT maxnum; |
4394 | bfd_reloc_code_real_type r; | |
4395 | char *p; | |
4396 | ||
4397 | treg = (ip->insn_opcode >> 16) & 0x1f; | |
4398 | dreg = (ip->insn_opcode >> 11) & 0x1f; | |
4399 | sreg = breg = (ip->insn_opcode >> 21) & 0x1f; | |
4400 | mask = ip->insn_mo->mask; | |
4401 | ||
4402 | expr1.X_op = O_constant; | |
4403 | expr1.X_op_symbol = NULL; | |
4404 | expr1.X_add_symbol = NULL; | |
4405 | expr1.X_add_number = 1; | |
4406 | ||
4407 | switch (mask) | |
4408 | { | |
4409 | #endif /* LOSING_COMPILER */ | |
3d3c5039 | 4410 | |
8358c818 ILT |
4411 | case M_DMUL: |
4412 | dbl = 1; | |
3d3c5039 | 4413 | case M_MUL: |
0dd2d296 | 4414 | macro_build ((char *) NULL, &icnt, NULL, |
8358c818 ILT |
4415 | dbl ? "dmultu" : "multu", |
4416 | "s,t", sreg, treg); | |
0dd2d296 | 4417 | macro_build ((char *) NULL, &icnt, NULL, "mflo", "d", dreg); |
670a50eb | 4418 | return; |
3d3c5039 | 4419 | |
8358c818 ILT |
4420 | case M_DMUL_I: |
4421 | dbl = 1; | |
3d3c5039 | 4422 | case M_MUL_I: |
8358c818 ILT |
4423 | /* The MIPS assembler some times generates shifts and adds. I'm |
4424 | not trying to be that fancy. GCC should do this for us | |
4425 | anyway. */ | |
d8a1c247 | 4426 | load_register (&icnt, AT, &imm_expr, dbl); |
0dd2d296 | 4427 | macro_build ((char *) NULL, &icnt, NULL, |
8358c818 ILT |
4428 | dbl ? "dmult" : "mult", |
4429 | "s,t", sreg, AT); | |
0dd2d296 | 4430 | macro_build ((char *) NULL, &icnt, NULL, "mflo", "d", dreg); |
670a50eb | 4431 | break; |
3d3c5039 | 4432 | |
8358c818 ILT |
4433 | case M_DMULO: |
4434 | dbl = 1; | |
4435 | case M_MULO: | |
4436 | mips_emit_delays (); | |
4437 | ++mips_noreorder; | |
0dd2d296 ILT |
4438 | mips_any_noreorder = 1; |
4439 | macro_build ((char *) NULL, &icnt, NULL, | |
8358c818 ILT |
4440 | dbl ? "dmult" : "mult", |
4441 | "s,t", sreg, treg); | |
0dd2d296 ILT |
4442 | macro_build ((char *) NULL, &icnt, NULL, "mflo", "d", dreg); |
4443 | macro_build ((char *) NULL, &icnt, NULL, | |
8358c818 ILT |
4444 | dbl ? "dsra32" : "sra", |
4445 | "d,w,<", dreg, dreg, 31); | |
0dd2d296 | 4446 | macro_build ((char *) NULL, &icnt, NULL, "mfhi", "d", AT); |
8ea7f4e8 ILT |
4447 | if (mips_trap) |
4448 | macro_build ((char *) NULL, &icnt, NULL, "tne", "s,t", dreg, AT); | |
4449 | else | |
4450 | { | |
4451 | expr1.X_add_number = 8; | |
4452 | macro_build ((char *) NULL, &icnt, &expr1, "beq", "s,t,p", dreg, AT); | |
4453 | macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0); | |
4454 | macro_build ((char *) NULL, &icnt, NULL, "break", "c", 6); | |
4455 | } | |
8358c818 | 4456 | --mips_noreorder; |
0dd2d296 | 4457 | macro_build ((char *) NULL, &icnt, NULL, "mflo", "d", dreg); |
8358c818 ILT |
4458 | break; |
4459 | ||
4460 | case M_DMULOU: | |
4461 | dbl = 1; | |
4462 | case M_MULOU: | |
4463 | mips_emit_delays (); | |
4464 | ++mips_noreorder; | |
0dd2d296 ILT |
4465 | mips_any_noreorder = 1; |
4466 | macro_build ((char *) NULL, &icnt, NULL, | |
8358c818 ILT |
4467 | dbl ? "dmultu" : "multu", |
4468 | "s,t", sreg, treg); | |
0dd2d296 ILT |
4469 | macro_build ((char *) NULL, &icnt, NULL, "mfhi", "d", AT); |
4470 | macro_build ((char *) NULL, &icnt, NULL, "mflo", "d", dreg); | |
8ea7f4e8 ILT |
4471 | if (mips_trap) |
4472 | macro_build ((char *) NULL, &icnt, NULL, "tne", "s,t", AT, 0); | |
4473 | else | |
4474 | { | |
4475 | expr1.X_add_number = 8; | |
4476 | macro_build ((char *) NULL, &icnt, &expr1, "beq", "s,t,p", AT, 0); | |
4477 | macro_build ((char *) NULL, &icnt, NULL, "nop", "", 0); | |
4478 | macro_build ((char *) NULL, &icnt, NULL, "break", "c", 6); | |
4479 | } | |
8358c818 ILT |
4480 | --mips_noreorder; |
4481 | break; | |
4482 | ||
3d3c5039 | 4483 | case M_ROL: |
0dd2d296 ILT |
4484 | macro_build ((char *) NULL, &icnt, NULL, "subu", "d,v,t", AT, 0, treg); |
4485 | macro_build ((char *) NULL, &icnt, NULL, "srlv", "d,t,s", AT, sreg, AT); | |
4486 | macro_build ((char *) NULL, &icnt, NULL, "sllv", "d,t,s", dreg, sreg, | |
4487 | treg); | |
4488 | macro_build ((char *) NULL, &icnt, NULL, "or", "d,v,t", dreg, dreg, AT); | |
670a50eb | 4489 | break; |
3d3c5039 ILT |
4490 | |
4491 | case M_ROL_I: | |
0dd2d296 | 4492 | macro_build ((char *) NULL, &icnt, NULL, "sll", "d,w,<", AT, sreg, |
a40aee38 | 4493 | (int) (imm_expr.X_add_number & 0x1f)); |
0dd2d296 | 4494 | macro_build ((char *) NULL, &icnt, NULL, "srl", "d,w,<", dreg, sreg, |
a40aee38 | 4495 | (int) ((0 - imm_expr.X_add_number) & 0x1f)); |
0dd2d296 | 4496 | macro_build ((char *) NULL, &icnt, NULL, "or", "d,v,t", dreg, dreg, AT); |
670a50eb | 4497 | break; |
3d3c5039 ILT |
4498 | |
4499 | case M_ROR: | |
0dd2d296 ILT |
4500 | macro_build ((char *) NULL, &icnt, NULL, "subu", "d,v,t", AT, 0, treg); |
4501 | macro_build ((char *) NULL, &icnt, NULL, "sllv", "d,t,s", AT, sreg, AT); | |
4502 | macro_build ((char *) NULL, &icnt, NULL, "srlv", "d,t,s", dreg, sreg, | |
4503 | treg); | |
4504 | macro_build ((char *) NULL, &icnt, NULL, "or", "d,v,t", dreg, dreg, AT); | |
670a50eb | 4505 | break; |
3d3c5039 ILT |
4506 | |
4507 | case M_ROR_I: | |
0dd2d296 | 4508 | macro_build ((char *) NULL, &icnt, NULL, "srl", "d,w,<", AT, sreg, |
a40aee38 | 4509 | (int) (imm_expr.X_add_number & 0x1f)); |
0dd2d296 | 4510 | macro_build ((char *) NULL, &icnt, NULL, "sll", "d,w,<", dreg, sreg, |
a40aee38 | 4511 | (int) ((0 - imm_expr.X_add_number) & 0x1f)); |
0dd2d296 | 4512 | macro_build ((char *) NULL, &icnt, NULL, "or", "d,v,t", dreg, dreg, AT); |
670a50eb | 4513 | break; |
3d3c5039 ILT |
4514 | |
4515 | case M_S_DOB: | |
8358c818 | 4516 | assert (mips_isa < 2); |
9a7d824a ILT |
4517 | /* Even on a big endian machine $fn comes before $fn+1. We have |
4518 | to adjust when storing to memory. */ | |
0dd2d296 | 4519 | macro_build ((char *) NULL, &icnt, &offset_expr, "swc1", "T,o(b)", |
9a7d824a | 4520 | byte_order == LITTLE_ENDIAN ? treg : treg + 1, |
9226253a | 4521 | (int) BFD_RELOC_LO16, breg); |
670a50eb | 4522 | offset_expr.X_add_number += 4; |
0dd2d296 | 4523 | macro_build ((char *) NULL, &icnt, &offset_expr, "swc1", "T,o(b)", |
9a7d824a | 4524 | byte_order == LITTLE_ENDIAN ? treg + 1 : treg, |
9226253a | 4525 | (int) BFD_RELOC_LO16, breg); |
670a50eb | 4526 | return; |
3d3c5039 | 4527 | |
3d3c5039 | 4528 | case M_SEQ: |
670a50eb | 4529 | if (sreg == 0) |
0dd2d296 ILT |
4530 | macro_build ((char *) NULL, &icnt, &expr1, "sltiu", "t,r,j", dreg, |
4531 | treg, (int) BFD_RELOC_LO16); | |
670a50eb | 4532 | else if (treg == 0) |
0dd2d296 ILT |
4533 | macro_build ((char *) NULL, &icnt, &expr1, "sltiu", "t,r,j", dreg, |
4534 | sreg, (int) BFD_RELOC_LO16); | |
670a50eb ILT |
4535 | else |
4536 | { | |
0dd2d296 ILT |
4537 | macro_build ((char *) NULL, &icnt, NULL, "xor", "d,v,t", dreg, |
4538 | sreg, treg); | |
4539 | macro_build ((char *) NULL, &icnt, &expr1, "sltiu", "t,r,j", dreg, | |
4540 | dreg, (int) BFD_RELOC_LO16); | |
3d3c5039 | 4541 | } |
670a50eb | 4542 | return; |
3d3c5039 ILT |
4543 | |
4544 | case M_SEQ_I: | |
670a50eb ILT |
4545 | if (imm_expr.X_add_number == 0) |
4546 | { | |
0dd2d296 ILT |
4547 | macro_build ((char *) NULL, &icnt, &expr1, "sltiu", "t,r,j", dreg, |
4548 | sreg, (int) BFD_RELOC_LO16); | |
670a50eb | 4549 | return; |
3d3c5039 | 4550 | } |
670a50eb ILT |
4551 | if (sreg == 0) |
4552 | { | |
9a7d824a | 4553 | as_warn ("Instruction %s: result is always false", |
6e8dda9c | 4554 | ip->insn_mo->name); |
0dd2d296 | 4555 | macro_build ((char *) NULL, &icnt, NULL, "move", "d,s", dreg, 0); |
670a50eb | 4556 | return; |
3d3c5039 | 4557 | } |
6e8dda9c | 4558 | if (imm_expr.X_add_number >= 0 && imm_expr.X_add_number < 0x10000) |
670a50eb | 4559 | { |
0dd2d296 ILT |
4560 | macro_build ((char *) NULL, &icnt, &imm_expr, "xori", "t,r,i", dreg, |
4561 | sreg, (int) BFD_RELOC_LO16); | |
670a50eb | 4562 | used_at = 0; |
6e8dda9c ILT |
4563 | } |
4564 | else if (imm_expr.X_add_number > -0x8000 && imm_expr.X_add_number < 0) | |
4565 | { | |
4566 | imm_expr.X_add_number = -imm_expr.X_add_number; | |
0dd2d296 | 4567 | macro_build ((char *) NULL, &icnt, &imm_expr, |
6e8dda9c | 4568 | mips_isa < 3 ? "addiu" : "daddiu", |
9226253a ILT |
4569 | "t,r,j", dreg, sreg, |
4570 | (int) BFD_RELOC_LO16); | |
6e8dda9c ILT |
4571 | used_at = 0; |
4572 | } | |
4573 | else | |
4574 | { | |
d8a1c247 | 4575 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 ILT |
4576 | macro_build ((char *) NULL, &icnt, NULL, "xor", "d,v,t", dreg, |
4577 | sreg, AT); | |
670a50eb ILT |
4578 | used_at = 1; |
4579 | } | |
0dd2d296 | 4580 | macro_build ((char *) NULL, &icnt, &expr1, "sltiu", "t,r,j", dreg, dreg, |
9226253a | 4581 | (int) BFD_RELOC_LO16); |
670a50eb ILT |
4582 | if (used_at) |
4583 | break; | |
4584 | return; | |
3d3c5039 ILT |
4585 | |
4586 | case M_SGE: /* sreg >= treg <==> not (sreg < treg) */ | |
670a50eb ILT |
4587 | s = "slt"; |
4588 | goto sge; | |
3d3c5039 | 4589 | case M_SGEU: |
670a50eb | 4590 | s = "sltu"; |
3d3c5039 | 4591 | sge: |
0dd2d296 ILT |
4592 | macro_build ((char *) NULL, &icnt, NULL, s, "d,v,t", dreg, sreg, treg); |
4593 | macro_build ((char *) NULL, &icnt, &expr1, "xori", "t,r,i", dreg, dreg, | |
9226253a | 4594 | (int) BFD_RELOC_LO16); |
670a50eb | 4595 | return; |
3d3c5039 | 4596 | |
670a50eb | 4597 | case M_SGE_I: /* sreg >= I <==> not (sreg < I) */ |
3d3c5039 | 4598 | case M_SGEU_I: |
6e8dda9c | 4599 | if (imm_expr.X_add_number >= -0x8000 && imm_expr.X_add_number < 0x8000) |
670a50eb | 4600 | { |
0dd2d296 | 4601 | macro_build ((char *) NULL, &icnt, &expr1, |
6e8dda9c | 4602 | mask == M_SGE_I ? "slti" : "sltiu", |
9226253a | 4603 | "t,r,j", dreg, sreg, (int) BFD_RELOC_LO16); |
670a50eb ILT |
4604 | used_at = 0; |
4605 | } | |
4606 | else | |
4607 | { | |
d8a1c247 | 4608 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 | 4609 | macro_build ((char *) NULL, &icnt, NULL, |
6e8dda9c ILT |
4610 | mask == M_SGE_I ? "slt" : "sltu", |
4611 | "d,v,t", dreg, sreg, AT); | |
670a50eb ILT |
4612 | used_at = 1; |
4613 | } | |
0dd2d296 | 4614 | macro_build ((char *) NULL, &icnt, &expr1, "xori", "t,r,i", dreg, dreg, |
9226253a | 4615 | (int) BFD_RELOC_LO16); |
670a50eb ILT |
4616 | if (used_at) |
4617 | break; | |
4618 | return; | |
3d3c5039 ILT |
4619 | |
4620 | case M_SGT: /* sreg > treg <==> treg < sreg */ | |
670a50eb ILT |
4621 | s = "slt"; |
4622 | goto sgt; | |
3d3c5039 | 4623 | case M_SGTU: |
670a50eb | 4624 | s = "sltu"; |
3d3c5039 | 4625 | sgt: |
0dd2d296 | 4626 | macro_build ((char *) NULL, &icnt, NULL, s, "d,v,t", dreg, treg, sreg); |
670a50eb | 4627 | return; |
3d3c5039 | 4628 | |
670a50eb ILT |
4629 | case M_SGT_I: /* sreg > I <==> I < sreg */ |
4630 | s = "slt"; | |
4631 | goto sgti; | |
3d3c5039 | 4632 | case M_SGTU_I: |
670a50eb | 4633 | s = "sltu"; |
3d3c5039 | 4634 | sgti: |
d8a1c247 | 4635 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 | 4636 | macro_build ((char *) NULL, &icnt, NULL, s, "d,v,t", dreg, AT, sreg); |
670a50eb | 4637 | break; |
3d3c5039 | 4638 | |
670a50eb ILT |
4639 | case M_SLE: /* sreg <= treg <==> treg >= sreg <==> not (treg < sreg) */ |
4640 | s = "slt"; | |
4641 | goto sle; | |
3d3c5039 | 4642 | case M_SLEU: |
670a50eb | 4643 | s = "sltu"; |
3d3c5039 | 4644 | sle: |
0dd2d296 ILT |
4645 | macro_build ((char *) NULL, &icnt, NULL, s, "d,v,t", dreg, treg, sreg); |
4646 | macro_build ((char *) NULL, &icnt, &expr1, "xori", "t,r,i", dreg, dreg, | |
9226253a | 4647 | (int) BFD_RELOC_LO16); |
670a50eb | 4648 | return; |
3d3c5039 | 4649 | |
670a50eb ILT |
4650 | case M_SLE_I: /* sreg <= I <==> I >= sreg <==> not (I < sreg) */ |
4651 | s = "slt"; | |
4652 | goto slei; | |
3d3c5039 | 4653 | case M_SLEU_I: |
670a50eb | 4654 | s = "sltu"; |
3d3c5039 | 4655 | slei: |
d8a1c247 | 4656 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 ILT |
4657 | macro_build ((char *) NULL, &icnt, NULL, s, "d,v,t", dreg, AT, sreg); |
4658 | macro_build ((char *) NULL, &icnt, &expr1, "xori", "t,r,i", dreg, dreg, | |
9226253a | 4659 | (int) BFD_RELOC_LO16); |
670a50eb | 4660 | break; |
3d3c5039 ILT |
4661 | |
4662 | case M_SLT_I: | |
6e8dda9c | 4663 | if (imm_expr.X_add_number >= -0x8000 && imm_expr.X_add_number < 0x8000) |
670a50eb | 4664 | { |
0dd2d296 ILT |
4665 | macro_build ((char *) NULL, &icnt, &imm_expr, "slti", "t,r,j", |
4666 | dreg, sreg, (int) BFD_RELOC_LO16); | |
670a50eb | 4667 | return; |
3d3c5039 | 4668 | } |
d8a1c247 | 4669 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 | 4670 | macro_build ((char *) NULL, &icnt, NULL, "slt", "d,v,t", dreg, sreg, AT); |
670a50eb | 4671 | break; |
3d3c5039 ILT |
4672 | |
4673 | case M_SLTU_I: | |
6e8dda9c | 4674 | if (imm_expr.X_add_number >= -0x8000 && imm_expr.X_add_number < 0x8000) |
670a50eb | 4675 | { |
0dd2d296 ILT |
4676 | macro_build ((char *) NULL, &icnt, &imm_expr, "sltiu", "t,r,j", |
4677 | dreg, sreg, (int) BFD_RELOC_LO16); | |
670a50eb | 4678 | return; |
3d3c5039 | 4679 | } |
d8a1c247 | 4680 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 ILT |
4681 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", dreg, sreg, |
4682 | AT); | |
670a50eb | 4683 | break; |
3d3c5039 ILT |
4684 | |
4685 | case M_SNE: | |
670a50eb | 4686 | if (sreg == 0) |
0dd2d296 ILT |
4687 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", dreg, 0, |
4688 | treg); | |
670a50eb | 4689 | else if (treg == 0) |
0dd2d296 ILT |
4690 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", dreg, 0, |
4691 | sreg); | |
670a50eb ILT |
4692 | else |
4693 | { | |
0dd2d296 ILT |
4694 | macro_build ((char *) NULL, &icnt, NULL, "xor", "d,v,t", dreg, |
4695 | sreg, treg); | |
4696 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", dreg, 0, | |
4697 | dreg); | |
3d3c5039 | 4698 | } |
670a50eb | 4699 | return; |
3d3c5039 ILT |
4700 | |
4701 | case M_SNE_I: | |
670a50eb ILT |
4702 | if (imm_expr.X_add_number == 0) |
4703 | { | |
0dd2d296 ILT |
4704 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", dreg, 0, |
4705 | sreg); | |
670a50eb | 4706 | return; |
3d3c5039 | 4707 | } |
670a50eb ILT |
4708 | if (sreg == 0) |
4709 | { | |
9a7d824a | 4710 | as_warn ("Instruction %s: result is always true", |
6e8dda9c | 4711 | ip->insn_mo->name); |
0dd2d296 | 4712 | macro_build ((char *) NULL, &icnt, &expr1, |
6e8dda9c | 4713 | mips_isa < 3 ? "addiu" : "daddiu", |
9226253a | 4714 | "t,r,j", dreg, 0, (int) BFD_RELOC_LO16); |
670a50eb | 4715 | return; |
3d3c5039 | 4716 | } |
6e8dda9c | 4717 | if (imm_expr.X_add_number >= 0 && imm_expr.X_add_number < 0x10000) |
670a50eb | 4718 | { |
0dd2d296 ILT |
4719 | macro_build ((char *) NULL, &icnt, &imm_expr, "xori", "t,r,i", |
4720 | dreg, sreg, (int) BFD_RELOC_LO16); | |
670a50eb | 4721 | used_at = 0; |
6e8dda9c ILT |
4722 | } |
4723 | else if (imm_expr.X_add_number > -0x8000 && imm_expr.X_add_number < 0) | |
4724 | { | |
4725 | imm_expr.X_add_number = -imm_expr.X_add_number; | |
0dd2d296 | 4726 | macro_build ((char *) NULL, &icnt, &imm_expr, |
6e8dda9c | 4727 | mips_isa < 3 ? "addiu" : "daddiu", |
9226253a | 4728 | "t,r,j", dreg, sreg, (int) BFD_RELOC_LO16); |
6e8dda9c ILT |
4729 | used_at = 0; |
4730 | } | |
4731 | else | |
4732 | { | |
d8a1c247 | 4733 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 ILT |
4734 | macro_build ((char *) NULL, &icnt, NULL, "xor", "d,v,t", dreg, |
4735 | sreg, AT); | |
670a50eb ILT |
4736 | used_at = 1; |
4737 | } | |
0dd2d296 | 4738 | macro_build ((char *) NULL, &icnt, NULL, "sltu", "d,v,t", dreg, 0, dreg); |
670a50eb ILT |
4739 | if (used_at) |
4740 | break; | |
4741 | return; | |
3d3c5039 | 4742 | |
8358c818 ILT |
4743 | case M_DSUB_I: |
4744 | dbl = 1; | |
3d3c5039 | 4745 | case M_SUB_I: |
6e8dda9c | 4746 | if (imm_expr.X_add_number > -0x8000 && imm_expr.X_add_number <= 0x8000) |
670a50eb ILT |
4747 | { |
4748 | imm_expr.X_add_number = -imm_expr.X_add_number; | |
0dd2d296 | 4749 | macro_build ((char *) NULL, &icnt, &imm_expr, |
8358c818 | 4750 | dbl ? "daddi" : "addi", |
9226253a | 4751 | "t,r,j", dreg, sreg, (int) BFD_RELOC_LO16); |
670a50eb | 4752 | return; |
3d3c5039 | 4753 | } |
d8a1c247 | 4754 | load_register (&icnt, AT, &imm_expr, dbl); |
0dd2d296 | 4755 | macro_build ((char *) NULL, &icnt, NULL, |
8358c818 ILT |
4756 | dbl ? "dsub" : "sub", |
4757 | "d,v,t", dreg, sreg, AT); | |
670a50eb | 4758 | break; |
3d3c5039 | 4759 | |
8358c818 ILT |
4760 | case M_DSUBU_I: |
4761 | dbl = 1; | |
3d3c5039 | 4762 | case M_SUBU_I: |
6e8dda9c | 4763 | if (imm_expr.X_add_number > -0x8000 && imm_expr.X_add_number <= 0x8000) |
670a50eb ILT |
4764 | { |
4765 | imm_expr.X_add_number = -imm_expr.X_add_number; | |
0dd2d296 | 4766 | macro_build ((char *) NULL, &icnt, &imm_expr, |
8358c818 | 4767 | dbl ? "daddiu" : "addiu", |
9226253a | 4768 | "t,r,j", dreg, sreg, (int) BFD_RELOC_LO16); |
670a50eb | 4769 | return; |
3d3c5039 | 4770 | } |
d8a1c247 | 4771 | load_register (&icnt, AT, &imm_expr, dbl); |
0dd2d296 | 4772 | macro_build ((char *) NULL, &icnt, NULL, |
8358c818 ILT |
4773 | dbl ? "dsubu" : "subu", |
4774 | "d,v,t", dreg, sreg, AT); | |
4775 | break; | |
4776 | ||
4777 | case M_TEQ_I: | |
4778 | s = "teq"; | |
4779 | goto trap; | |
4780 | case M_TGE_I: | |
4781 | s = "tge"; | |
4782 | goto trap; | |
4783 | case M_TGEU_I: | |
4784 | s = "tgeu"; | |
4785 | goto trap; | |
4786 | case M_TLT_I: | |
4787 | s = "tlt"; | |
4788 | goto trap; | |
4789 | case M_TLTU_I: | |
4790 | s = "tltu"; | |
4791 | goto trap; | |
4792 | case M_TNE_I: | |
4793 | s = "tne"; | |
4794 | trap: | |
d8a1c247 | 4795 | load_register (&icnt, AT, &imm_expr, 0); |
0dd2d296 | 4796 | macro_build ((char *) NULL, &icnt, NULL, s, "s,t", sreg, AT); |
670a50eb | 4797 | break; |
3d3c5039 ILT |
4798 | |
4799 | case M_TRUNCWD: | |
4800 | case M_TRUNCWS: | |
8358c818 | 4801 | assert (mips_isa < 2); |
670a50eb ILT |
4802 | sreg = (ip->insn_opcode >> 11) & 0x1f; /* floating reg */ |
4803 | dreg = (ip->insn_opcode >> 06) & 0x1f; /* floating reg */ | |
4804 | ||
4805 | /* | |
4806 | * Is the double cfc1 instruction a bug in the mips assembler; | |
4807 | * or is there a reason for it? | |
4808 | */ | |
becfe05e ILT |
4809 | mips_emit_delays (); |
4810 | ++mips_noreorder; | |
0dd2d296 ILT |
4811 | mips_any_noreorder = 1; |
4812 | macro_build ((char *) NULL, &icnt, NULL, "cfc1", "t,G", treg, 31); | |
4813 | macro_build ((char *) NULL, &icnt, NULL, "cfc1", "t,G", treg, 31); | |
4814 | macro_build ((char *) NULL, &icnt, NULL, "nop", ""); | |
670a50eb | 4815 | expr1.X_add_number = 3; |
0dd2d296 | 4816 | macro_build ((char *) NULL, &icnt, &expr1, "ori", "t,r,i", AT, treg, |
9226253a | 4817 | (int) BFD_RELOC_LO16); |
670a50eb | 4818 | expr1.X_add_number = 2; |
0dd2d296 | 4819 | macro_build ((char *) NULL, &icnt, &expr1, "xori", "t,r,i", AT, AT, |
9226253a | 4820 | (int) BFD_RELOC_LO16); |
0dd2d296 ILT |
4821 | macro_build ((char *) NULL, &icnt, NULL, "ctc1", "t,G", AT, 31); |
4822 | macro_build ((char *) NULL, &icnt, NULL, "nop", ""); | |
4823 | macro_build ((char *) NULL, &icnt, NULL, | |
670a50eb | 4824 | mask == M_TRUNCWD ? "cvt.w.d" : "cvt.w.s", "D,S", dreg, sreg); |
0dd2d296 ILT |
4825 | macro_build ((char *) NULL, &icnt, NULL, "ctc1", "t,G", treg, 31); |
4826 | macro_build ((char *) NULL, &icnt, NULL, "nop", ""); | |
becfe05e | 4827 | --mips_noreorder; |
670a50eb | 4828 | break; |
3d3c5039 ILT |
4829 | |
4830 | case M_ULH: | |
670a50eb ILT |
4831 | s = "lb"; |
4832 | goto ulh; | |
3d3c5039 | 4833 | case M_ULHU: |
670a50eb | 4834 | s = "lbu"; |
3d3c5039 | 4835 | ulh: |
8ea7f4e8 ILT |
4836 | if (offset_expr.X_add_number >= 0x7fff) |
4837 | as_bad ("operand overflow"); | |
670a50eb | 4838 | /* avoid load delay */ |
8ea7f4e8 ILT |
4839 | if (byte_order == LITTLE_ENDIAN) |
4840 | offset_expr.X_add_number += 1; | |
0dd2d296 | 4841 | macro_build ((char *) NULL, &icnt, &offset_expr, s, "t,o(b)", treg, |
9226253a | 4842 | (int) BFD_RELOC_LO16, breg); |
8ea7f4e8 ILT |
4843 | if (byte_order == LITTLE_ENDIAN) |
4844 | offset_expr.X_add_number -= 1; | |
4845 | else | |
4846 | offset_expr.X_add_number += 1; | |
0dd2d296 | 4847 | macro_build ((char *) NULL, &icnt, &offset_expr, "lbu", "t,o(b)", AT, |
9226253a | 4848 | (int) BFD_RELOC_LO16, breg); |
0dd2d296 ILT |
4849 | macro_build ((char *) NULL, &icnt, NULL, "sll", "d,w,<", treg, treg, 8); |
4850 | macro_build ((char *) NULL, &icnt, NULL, "or", "d,v,t", treg, treg, AT); | |
670a50eb | 4851 | break; |
3d3c5039 | 4852 | |
adcf2b9d ILT |
4853 | case M_ULD: |
4854 | s = "ldl"; | |
4855 | s2 = "ldr"; | |
4856 | off = 7; | |
4857 | goto ulw; | |
3d3c5039 | 4858 | case M_ULW: |
adcf2b9d ILT |
4859 | s = "lwl"; |
4860 | s2 = "lwr"; | |
4861 | off = 3; | |
4862 | ulw: | |
4863 | if (offset_expr.X_add_number >= 0x8000 - off) | |
8ea7f4e8 ILT |
4864 | as_bad ("operand overflow"); |
4865 | if (byte_order == LITTLE_ENDIAN) | |
adcf2b9d ILT |
4866 | offset_expr.X_add_number += off; |
4867 | macro_build ((char *) NULL, &icnt, &offset_expr, s, "t,o(b)", treg, | |
9226253a | 4868 | (int) BFD_RELOC_LO16, breg); |
8ea7f4e8 | 4869 | if (byte_order == LITTLE_ENDIAN) |
adcf2b9d | 4870 | offset_expr.X_add_number -= off; |
8ea7f4e8 | 4871 | else |
adcf2b9d ILT |
4872 | offset_expr.X_add_number += off; |
4873 | macro_build ((char *) NULL, &icnt, &offset_expr, s2, "t,o(b)", treg, | |
9226253a | 4874 | (int) BFD_RELOC_LO16, breg); |
670a50eb | 4875 | return; |
3d3c5039 | 4876 | |
adcf2b9d ILT |
4877 | case M_ULD_A: |
4878 | s = "ldl"; | |
4879 | s2 = "ldr"; | |
4880 | off = 7; | |
4881 | goto ulwa; | |
4882 | case M_ULW_A: | |
4883 | s = "lwl"; | |
4884 | s2 = "lwr"; | |
4885 | off = 3; | |
4886 | ulwa: | |
4887 | load_address (&icnt, AT, &offset_expr); | |
c625fc23 JSC |
4888 | if (breg != 0) |
4889 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
4890 | mips_isa < 3 ? "addu" : "daddu", | |
4891 | "d,v,t", AT, AT, breg); | |
adcf2b9d ILT |
4892 | if (byte_order == LITTLE_ENDIAN) |
4893 | expr1.X_add_number = off; | |
4894 | else | |
4895 | expr1.X_add_number = 0; | |
4896 | macro_build ((char *) NULL, &icnt, &expr1, s, "t,o(b)", treg, | |
4897 | (int) BFD_RELOC_LO16, AT); | |
4898 | if (byte_order == LITTLE_ENDIAN) | |
4899 | expr1.X_add_number = 0; | |
4900 | else | |
4901 | expr1.X_add_number = off; | |
4902 | macro_build ((char *) NULL, &icnt, &expr1, s2, "t,o(b)", treg, | |
4903 | (int) BFD_RELOC_LO16, AT); | |
4904 | break; | |
4905 | ||
3d3c5039 ILT |
4906 | case M_ULH_A: |
4907 | case M_ULHU_A: | |
0dd2d296 | 4908 | load_address (&icnt, AT, &offset_expr); |
c625fc23 JSC |
4909 | if (breg != 0) |
4910 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
4911 | mips_isa < 3 ? "addu" : "daddu", | |
4912 | "d,v,t", AT, AT, breg); | |
adcf2b9d ILT |
4913 | if (byte_order == BIG_ENDIAN) |
4914 | expr1.X_add_number = 0; | |
4915 | macro_build ((char *) NULL, &icnt, &expr1, | |
4916 | mask == M_ULH_A ? "lb" : "lbu", "t,o(b)", treg, | |
4917 | (int) BFD_RELOC_LO16, AT); | |
4918 | if (byte_order == BIG_ENDIAN) | |
4919 | expr1.X_add_number = 1; | |
670a50eb | 4920 | else |
adcf2b9d ILT |
4921 | expr1.X_add_number = 0; |
4922 | macro_build ((char *) NULL, &icnt, &expr1, "lbu", "t,o(b)", AT, | |
4923 | (int) BFD_RELOC_LO16, AT); | |
4924 | macro_build ((char *) NULL, &icnt, NULL, "sll", "d,w,<", treg, | |
4925 | treg, 8); | |
4926 | macro_build ((char *) NULL, &icnt, NULL, "or", "d,v,t", treg, | |
4927 | treg, AT); | |
670a50eb | 4928 | break; |
3d3c5039 ILT |
4929 | |
4930 | case M_USH: | |
8ea7f4e8 ILT |
4931 | if (offset_expr.X_add_number >= 0x7fff) |
4932 | as_bad ("operand overflow"); | |
4933 | if (byte_order == BIG_ENDIAN) | |
4934 | offset_expr.X_add_number += 1; | |
0dd2d296 | 4935 | macro_build ((char *) NULL, &icnt, &offset_expr, "sb", "t,o(b)", treg, |
9226253a | 4936 | (int) BFD_RELOC_LO16, breg); |
0dd2d296 | 4937 | macro_build ((char *) NULL, &icnt, NULL, "srl", "d,w,<", AT, treg, 8); |
8ea7f4e8 ILT |
4938 | if (byte_order == BIG_ENDIAN) |
4939 | offset_expr.X_add_number -= 1; | |
4940 | else | |
4941 | offset_expr.X_add_number += 1; | |
0dd2d296 | 4942 | macro_build ((char *) NULL, &icnt, &offset_expr, "sb", "t,o(b)", AT, |
9226253a | 4943 | (int) BFD_RELOC_LO16, breg); |
670a50eb | 4944 | break; |
3d3c5039 | 4945 | |
adcf2b9d ILT |
4946 | case M_USD: |
4947 | s = "sdl"; | |
4948 | s2 = "sdr"; | |
4949 | off = 7; | |
4950 | goto usw; | |
3d3c5039 | 4951 | case M_USW: |
adcf2b9d ILT |
4952 | s = "swl"; |
4953 | s2 = "swr"; | |
4954 | off = 3; | |
4955 | usw: | |
4956 | if (offset_expr.X_add_number >= 0x8000 - off) | |
8ea7f4e8 ILT |
4957 | as_bad ("operand overflow"); |
4958 | if (byte_order == LITTLE_ENDIAN) | |
adcf2b9d ILT |
4959 | offset_expr.X_add_number += off; |
4960 | macro_build ((char *) NULL, &icnt, &offset_expr, s, "t,o(b)", treg, | |
9226253a | 4961 | (int) BFD_RELOC_LO16, breg); |
8ea7f4e8 | 4962 | if (byte_order == LITTLE_ENDIAN) |
adcf2b9d | 4963 | offset_expr.X_add_number -= off; |
8ea7f4e8 | 4964 | else |
adcf2b9d ILT |
4965 | offset_expr.X_add_number += off; |
4966 | macro_build ((char *) NULL, &icnt, &offset_expr, s2, "t,o(b)", treg, | |
9226253a | 4967 | (int) BFD_RELOC_LO16, breg); |
670a50eb | 4968 | return; |
3d3c5039 | 4969 | |
adcf2b9d ILT |
4970 | case M_USD_A: |
4971 | s = "sdl"; | |
4972 | s2 = "sdr"; | |
4973 | off = 7; | |
4974 | goto uswa; | |
3d3c5039 | 4975 | case M_USW_A: |
adcf2b9d ILT |
4976 | s = "swl"; |
4977 | s2 = "swr"; | |
4978 | off = 3; | |
4979 | uswa: | |
0dd2d296 | 4980 | load_address (&icnt, AT, &offset_expr); |
c625fc23 JSC |
4981 | if (breg != 0) |
4982 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
4983 | mips_isa < 3 ? "addu" : "daddu", | |
4984 | "d,v,t", AT, AT, breg); | |
adcf2b9d ILT |
4985 | if (byte_order == LITTLE_ENDIAN) |
4986 | expr1.X_add_number = off; | |
670a50eb | 4987 | else |
adcf2b9d ILT |
4988 | expr1.X_add_number = 0; |
4989 | macro_build ((char *) NULL, &icnt, &expr1, s, "t,o(b)", treg, | |
4990 | (int) BFD_RELOC_LO16, AT); | |
4991 | if (byte_order == LITTLE_ENDIAN) | |
4992 | expr1.X_add_number = 0; | |
4993 | else | |
4994 | expr1.X_add_number = off; | |
4995 | macro_build ((char *) NULL, &icnt, &expr1, s2, "t,o(b)", treg, | |
4996 | (int) BFD_RELOC_LO16, AT); | |
4997 | break; | |
4998 | ||
4999 | case M_USH_A: | |
5000 | load_address (&icnt, AT, &offset_expr); | |
c625fc23 JSC |
5001 | if (breg != 0) |
5002 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
5003 | mips_isa < 3 ? "addu" : "daddu", | |
5004 | "d,v,t", AT, AT, breg); | |
adcf2b9d ILT |
5005 | if (byte_order == LITTLE_ENDIAN) |
5006 | expr1.X_add_number = 0; | |
5007 | macro_build ((char *) NULL, &icnt, &expr1, "sb", "t,o(b)", treg, | |
5008 | (int) BFD_RELOC_LO16, AT); | |
5009 | macro_build ((char *) NULL, &icnt, NULL, "srl", "d,w,<", treg, | |
5010 | treg, 8); | |
5011 | if (byte_order == LITTLE_ENDIAN) | |
5012 | expr1.X_add_number = 1; | |
5013 | else | |
5014 | expr1.X_add_number = 0; | |
5015 | macro_build ((char *) NULL, &icnt, &expr1, "sb", "t,o(b)", treg, | |
5016 | (int) BFD_RELOC_LO16, AT); | |
5017 | if (byte_order == LITTLE_ENDIAN) | |
5018 | expr1.X_add_number = 0; | |
5019 | else | |
5020 | expr1.X_add_number = 1; | |
5021 | macro_build ((char *) NULL, &icnt, &expr1, "lbu", "t,o(b)", AT, | |
5022 | (int) BFD_RELOC_LO16, AT); | |
5023 | macro_build ((char *) NULL, &icnt, NULL, "sll", "d,w,<", treg, | |
5024 | treg, 8); | |
5025 | macro_build ((char *) NULL, &icnt, NULL, "or", "d,v,t", treg, | |
5026 | treg, AT); | |
670a50eb | 5027 | break; |
3d3c5039 ILT |
5028 | |
5029 | default: | |
670a50eb | 5030 | as_bad ("Macro %s not implemented yet", ip->insn_mo->name); |
8358c818 | 5031 | break; |
3d3c5039 | 5032 | } |
670a50eb ILT |
5033 | if (mips_noat) |
5034 | as_warn ("Macro used $at after \".set noat\""); | |
3d3c5039 ILT |
5035 | } |
5036 | ||
867a58b3 ILT |
5037 | /* This routine assembles an instruction into its binary format. As a |
5038 | side effect, it sets one of the global variables imm_reloc or | |
5039 | offset_reloc to the type of relocation to do if one of the operands | |
5040 | is an address expression. */ | |
3d3c5039 | 5041 | |
3d3c5039 ILT |
5042 | static void |
5043 | mips_ip (str, ip) | |
5044 | char *str; | |
5045 | struct mips_cl_insn *ip; | |
5046 | { | |
670a50eb ILT |
5047 | char *s; |
5048 | const char *args; | |
5049 | char c; | |
5050 | struct mips_opcode *insn; | |
5051 | char *argsStart; | |
5052 | unsigned int regno; | |
5053 | unsigned int lastregno = 0; | |
5054 | char *s_reset; | |
5055 | ||
5056 | insn_error = NULL; | |
5057 | ||
c625fc23 | 5058 | for (s = str; islower (*s) || (*s >= '0' && *s <= '3') || *s == '6' || *s == '.'; ++s) |
670a50eb ILT |
5059 | continue; |
5060 | switch (*s) | |
5061 | { | |
3d3c5039 | 5062 | case '\0': |
670a50eb | 5063 | break; |
3d3c5039 ILT |
5064 | |
5065 | case ' ': | |
670a50eb ILT |
5066 | *s++ = '\0'; |
5067 | break; | |
3d3c5039 ILT |
5068 | |
5069 | default: | |
460531da | 5070 | as_fatal ("Unknown opcode: `%s'", str); |
3d3c5039 | 5071 | } |
670a50eb ILT |
5072 | if ((insn = (struct mips_opcode *) hash_find (op_hash, str)) == NULL) |
5073 | { | |
9753202d | 5074 | insn_error = "unrecognized opcode"; |
670a50eb | 5075 | return; |
3d3c5039 | 5076 | } |
670a50eb ILT |
5077 | argsStart = s; |
5078 | for (;;) | |
5079 | { | |
8358c818 ILT |
5080 | int insn_isa; |
5081 | ||
670a50eb | 5082 | assert (strcmp (insn->name, str) == 0); |
8358c818 ILT |
5083 | |
5084 | if (insn->pinfo == INSN_MACRO) | |
5085 | insn_isa = insn->match; | |
b2b8c24e | 5086 | else if ((insn->pinfo & INSN_ISA) == INSN_ISA2) |
8358c818 | 5087 | insn_isa = 2; |
b2b8c24e | 5088 | else if ((insn->pinfo & INSN_ISA) == INSN_ISA3) |
8358c818 | 5089 | insn_isa = 3; |
d8a1c247 KR |
5090 | else if ((insn->pinfo & INSN_ISA) == INSN_ISA4) |
5091 | insn_isa = 4; | |
8358c818 ILT |
5092 | else |
5093 | insn_isa = 1; | |
5094 | ||
b2b8c24e ILT |
5095 | if (insn_isa > mips_isa |
5096 | || ((insn->pinfo & INSN_ISA) == INSN_4650 | |
e532b44c ILT |
5097 | && ! mips_4650) |
5098 | || ((insn->pinfo & INSN_ISA) == INSN_4010 | |
c625fc23 JSC |
5099 | && ! mips_4010) |
5100 | || ((insn->pinfo & INSN_ISA) == INSN_4100 | |
5101 | && ! mips_4100)) | |
8358c818 ILT |
5102 | { |
5103 | if (insn + 1 < &mips_opcodes[NUMOPCODES] | |
5104 | && strcmp (insn->name, insn[1].name) == 0) | |
5105 | { | |
5106 | ++insn; | |
5107 | continue; | |
5108 | } | |
9753202d ILT |
5109 | insn_error = "opcode not supported on this processor"; |
5110 | return; | |
8358c818 ILT |
5111 | } |
5112 | ||
670a50eb ILT |
5113 | ip->insn_mo = insn; |
5114 | ip->insn_opcode = insn->match; | |
5115 | for (args = insn->args;; ++args) | |
5116 | { | |
5117 | if (*s == ' ') | |
5118 | ++s; | |
5119 | switch (*args) | |
5120 | { | |
5121 | case '\0': /* end of args */ | |
5122 | if (*s == '\0') | |
5123 | return; | |
5124 | break; | |
3d3c5039 ILT |
5125 | |
5126 | case ',': | |
670a50eb ILT |
5127 | if (*s++ == *args) |
5128 | continue; | |
5129 | s--; | |
5130 | switch (*++args) | |
5131 | { | |
3d3c5039 ILT |
5132 | case 'r': |
5133 | case 'v': | |
670a50eb ILT |
5134 | ip->insn_opcode |= lastregno << 21; |
5135 | continue; | |
3d3c5039 ILT |
5136 | |
5137 | case 'w': | |
5138 | case 'W': | |
670a50eb ILT |
5139 | ip->insn_opcode |= lastregno << 16; |
5140 | continue; | |
3d3c5039 ILT |
5141 | |
5142 | case 'V': | |
670a50eb ILT |
5143 | ip->insn_opcode |= lastregno << 11; |
5144 | continue; | |
3d3c5039 | 5145 | } |
670a50eb | 5146 | break; |
3d3c5039 ILT |
5147 | |
5148 | case '(': | |
670a50eb ILT |
5149 | /* handle optional base register. |
5150 | Either the base register is omitted or | |
5151 | we must have a left paren. */ | |
5152 | /* this is dependent on the next operand specifier | |
5153 | is a 'b' for base register */ | |
5154 | assert (args[1] == 'b'); | |
5155 | if (*s == '\0') | |
5156 | return; | |
3d3c5039 | 5157 | |
670a50eb ILT |
5158 | case ')': /* these must match exactly */ |
5159 | if (*s++ == *args) | |
3d3c5039 | 5160 | continue; |
670a50eb ILT |
5161 | break; |
5162 | ||
5163 | case '<': /* must be at least one digit */ | |
5164 | /* | |
5165 | * According to the manual, if the shift amount is greater | |
5166 | * than 31 or less than 0 the the shift amount should be | |
5167 | * mod 32. In reality the mips assembler issues an error. | |
9226253a | 5168 | * We issue a warning and mask out all but the low 5 bits. |
670a50eb ILT |
5169 | */ |
5170 | my_getExpression (&imm_expr, s); | |
5171 | check_absolute_expr (ip, &imm_expr); | |
5172 | if ((unsigned long) imm_expr.X_add_number > 31) | |
5173 | { | |
58d4951d ILT |
5174 | as_warn ("Improper shift amount (%ld)", |
5175 | (long) imm_expr.X_add_number); | |
9226253a | 5176 | imm_expr.X_add_number = imm_expr.X_add_number & 0x1f; |
670a50eb ILT |
5177 | } |
5178 | ip->insn_opcode |= imm_expr.X_add_number << 6; | |
5ac34ac3 | 5179 | imm_expr.X_op = O_absent; |
670a50eb ILT |
5180 | s = expr_end; |
5181 | continue; | |
5182 | ||
56c96faa ILT |
5183 | case '>': /* shift amount minus 32 */ |
5184 | my_getExpression (&imm_expr, s); | |
5185 | check_absolute_expr (ip, &imm_expr); | |
5186 | if ((unsigned long) imm_expr.X_add_number < 32 | |
5187 | || (unsigned long) imm_expr.X_add_number > 63) | |
5188 | break; | |
5189 | ip->insn_opcode |= (imm_expr.X_add_number - 32) << 6; | |
5190 | imm_expr.X_op = O_absent; | |
5191 | s = expr_end; | |
5192 | continue; | |
5193 | ||
9226253a | 5194 | case 'k': /* cache code */ |
d8a1c247 | 5195 | case 'h': /* prefx code */ |
9226253a ILT |
5196 | my_getExpression (&imm_expr, s); |
5197 | check_absolute_expr (ip, &imm_expr); | |
5198 | if ((unsigned long) imm_expr.X_add_number > 31) | |
5199 | { | |
d8a1c247 KR |
5200 | as_warn ("Invalid value for `%s' (%lu)", |
5201 | ip->insn_mo->name, | |
9226253a ILT |
5202 | (unsigned long) imm_expr.X_add_number); |
5203 | imm_expr.X_add_number &= 0x1f; | |
5204 | } | |
d8a1c247 KR |
5205 | if (*args == 'k') |
5206 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_CACHE; | |
5207 | else | |
5208 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_PREFX; | |
9226253a ILT |
5209 | imm_expr.X_op = O_absent; |
5210 | s = expr_end; | |
5211 | continue; | |
5212 | ||
670a50eb ILT |
5213 | case 'c': /* break code */ |
5214 | my_getExpression (&imm_expr, s); | |
5215 | check_absolute_expr (ip, &imm_expr); | |
5216 | if ((unsigned) imm_expr.X_add_number > 1023) | |
58d4951d ILT |
5217 | as_warn ("Illegal break code (%ld)", |
5218 | (long) imm_expr.X_add_number); | |
670a50eb | 5219 | ip->insn_opcode |= imm_expr.X_add_number << 16; |
5ac34ac3 | 5220 | imm_expr.X_op = O_absent; |
670a50eb ILT |
5221 | s = expr_end; |
5222 | continue; | |
5223 | ||
918692a5 ILT |
5224 | case 'B': /* syscall code */ |
5225 | my_getExpression (&imm_expr, s); | |
5226 | check_absolute_expr (ip, &imm_expr); | |
5227 | if ((unsigned) imm_expr.X_add_number > 0xfffff) | |
58d4951d ILT |
5228 | as_warn ("Illegal syscall code (%ld)", |
5229 | (long) imm_expr.X_add_number); | |
918692a5 | 5230 | ip->insn_opcode |= imm_expr.X_add_number << 6; |
5ac34ac3 | 5231 | imm_expr.X_op = O_absent; |
918692a5 ILT |
5232 | s = expr_end; |
5233 | continue; | |
5234 | ||
0aa07269 ILT |
5235 | case 'C': /* Coprocessor code */ |
5236 | my_getExpression (&imm_expr, s); | |
5237 | check_absolute_expr (ip, &imm_expr); | |
5238 | if ((unsigned long) imm_expr.X_add_number >= (1<<25)) | |
5239 | { | |
58d4951d ILT |
5240 | as_warn ("Coproccesor code > 25 bits (%ld)", |
5241 | (long) imm_expr.X_add_number); | |
0aa07269 ILT |
5242 | imm_expr.X_add_number &= ((1<<25) - 1); |
5243 | } | |
5244 | ip->insn_opcode |= imm_expr.X_add_number; | |
5245 | imm_expr.X_op = O_absent; | |
5246 | s = expr_end; | |
5247 | continue; | |
5248 | ||
670a50eb ILT |
5249 | case 'b': /* base register */ |
5250 | case 'd': /* destination register */ | |
5251 | case 's': /* source register */ | |
5252 | case 't': /* target register */ | |
5253 | case 'r': /* both target and source */ | |
5254 | case 'v': /* both dest and source */ | |
5255 | case 'w': /* both dest and target */ | |
918692a5 ILT |
5256 | case 'E': /* coprocessor target register */ |
5257 | case 'G': /* coprocessor destination register */ | |
8358c818 | 5258 | case 'x': /* ignore register name */ |
ff3a5c18 | 5259 | case 'z': /* must be zero register */ |
670a50eb ILT |
5260 | s_reset = s; |
5261 | if (s[0] == '$') | |
5262 | { | |
5263 | if (isdigit (s[1])) | |
5264 | { | |
5265 | ++s; | |
5266 | regno = 0; | |
5267 | do | |
5268 | { | |
5269 | regno *= 10; | |
5270 | regno += *s - '0'; | |
5271 | ++s; | |
5272 | } | |
5273 | while (isdigit (*s)); | |
0aa07269 ILT |
5274 | if (regno > 31) |
5275 | as_bad ("Invalid register number (%d)", regno); | |
670a50eb | 5276 | } |
0dd2d296 ILT |
5277 | else if (*args == 'E' || *args == 'G') |
5278 | goto notreg; | |
5279 | else | |
670a50eb | 5280 | { |
0aa07269 ILT |
5281 | if (s[1] == 'f' && s[2] == 'p') |
5282 | { | |
5283 | s += 3; | |
9226253a | 5284 | regno = FP; |
0aa07269 ILT |
5285 | } |
5286 | else if (s[1] == 's' && s[2] == 'p') | |
5287 | { | |
5288 | s += 3; | |
9226253a | 5289 | regno = SP; |
0aa07269 ILT |
5290 | } |
5291 | else if (s[1] == 'g' && s[2] == 'p') | |
5292 | { | |
5293 | s += 3; | |
9226253a | 5294 | regno = GP; |
0aa07269 ILT |
5295 | } |
5296 | else if (s[1] == 'a' && s[2] == 't') | |
5297 | { | |
5298 | s += 3; | |
9226253a | 5299 | regno = AT; |
0aa07269 | 5300 | } |
b2b8c24e ILT |
5301 | else if (s[1] == 'k' && s[2] == 't' && s[3] == '0') |
5302 | { | |
5303 | s += 4; | |
5304 | regno = KT0; | |
5305 | } | |
5306 | else if (s[1] == 'k' && s[2] == 't' && s[3] == '1') | |
5307 | { | |
5308 | s += 4; | |
5309 | regno = KT1; | |
5310 | } | |
0aa07269 ILT |
5311 | else |
5312 | goto notreg; | |
670a50eb | 5313 | } |
9753202d ILT |
5314 | if (regno == AT |
5315 | && ! mips_noat | |
5316 | && *args != 'E' | |
5317 | && *args != 'G') | |
13fe1379 | 5318 | as_warn ("Used $at without \".set noat\""); |
670a50eb ILT |
5319 | c = *args; |
5320 | if (*s == ' ') | |
5321 | s++; | |
5322 | if (args[1] != *s) | |
5323 | { | |
5324 | if (c == 'r' || c == 'v' || c == 'w') | |
5325 | { | |
5326 | regno = lastregno; | |
5327 | s = s_reset; | |
5328 | args++; | |
5329 | } | |
5330 | } | |
ff3a5c18 ILT |
5331 | /* 'z' only matches $0. */ |
5332 | if (c == 'z' && regno != 0) | |
5333 | break; | |
670a50eb ILT |
5334 | switch (c) |
5335 | { | |
3d3c5039 ILT |
5336 | case 'r': |
5337 | case 's': | |
5338 | case 'v': | |
5339 | case 'b': | |
670a50eb ILT |
5340 | ip->insn_opcode |= regno << 21; |
5341 | break; | |
3d3c5039 | 5342 | case 'd': |
918692a5 | 5343 | case 'G': |
670a50eb ILT |
5344 | ip->insn_opcode |= regno << 11; |
5345 | break; | |
3d3c5039 ILT |
5346 | case 'w': |
5347 | case 't': | |
918692a5 | 5348 | case 'E': |
670a50eb | 5349 | ip->insn_opcode |= regno << 16; |
8358c818 ILT |
5350 | break; |
5351 | case 'x': | |
5352 | /* This case exists because on the r3000 trunc | |
5353 | expands into a macro which requires a gp | |
5354 | register. On the r6000 or r4000 it is | |
5355 | assembled into a single instruction which | |
5356 | ignores the register. Thus the insn version | |
5357 | is MIPS_ISA2 and uses 'x', and the macro | |
5358 | version is MIPS_ISA1 and uses 't'. */ | |
5359 | break; | |
ff3a5c18 ILT |
5360 | case 'z': |
5361 | /* This case is for the div instruction, which | |
5362 | acts differently if the destination argument | |
5363 | is $0. This only matches $0, and is checked | |
5364 | outside the switch. */ | |
5365 | break; | |
3d3c5039 | 5366 | } |
670a50eb ILT |
5367 | lastregno = regno; |
5368 | continue; | |
3d3c5039 ILT |
5369 | } |
5370 | notreg: | |
670a50eb ILT |
5371 | switch (*args++) |
5372 | { | |
3d3c5039 ILT |
5373 | case 'r': |
5374 | case 'v': | |
670a50eb ILT |
5375 | ip->insn_opcode |= lastregno << 21; |
5376 | continue; | |
3d3c5039 | 5377 | case 'w': |
670a50eb ILT |
5378 | ip->insn_opcode |= lastregno << 16; |
5379 | continue; | |
3d3c5039 | 5380 | } |
670a50eb | 5381 | break; |
3d3c5039 | 5382 | |
670a50eb ILT |
5383 | case 'D': /* floating point destination register */ |
5384 | case 'S': /* floating point source register */ | |
5385 | case 'T': /* floating point target register */ | |
d8a1c247 | 5386 | case 'R': /* floating point source register */ |
3d3c5039 ILT |
5387 | case 'V': |
5388 | case 'W': | |
670a50eb ILT |
5389 | s_reset = s; |
5390 | if (s[0] == '$' && s[1] == 'f' && isdigit (s[2])) | |
5391 | { | |
5392 | s += 2; | |
5393 | regno = 0; | |
5394 | do | |
5395 | { | |
5396 | regno *= 10; | |
5397 | regno += *s - '0'; | |
5398 | ++s; | |
5399 | } | |
5400 | while (isdigit (*s)); | |
5401 | ||
5402 | if (regno > 31) | |
5403 | as_bad ("Invalid float register number (%d)", regno); | |
5404 | ||
9226253a ILT |
5405 | if ((regno & 1) != 0 |
5406 | && mips_isa < 3 | |
5407 | && ! (strcmp (str, "mtc1") == 0 || | |
5408 | strcmp (str, "mfc1") == 0 || | |
5409 | strcmp (str, "lwc1") == 0 || | |
5410 | strcmp (str, "swc1") == 0)) | |
670a50eb ILT |
5411 | as_warn ("Float register should be even, was %d", |
5412 | regno); | |
5413 | ||
5414 | c = *args; | |
5415 | if (*s == ' ') | |
5416 | s++; | |
5417 | if (args[1] != *s) | |
5418 | { | |
5419 | if (c == 'V' || c == 'W') | |
5420 | { | |
5421 | regno = lastregno; | |
5422 | s = s_reset; | |
5423 | args++; | |
3d3c5039 ILT |
5424 | } |
5425 | } | |
670a50eb ILT |
5426 | switch (c) |
5427 | { | |
3d3c5039 | 5428 | case 'D': |
670a50eb ILT |
5429 | ip->insn_opcode |= regno << 6; |
5430 | break; | |
3d3c5039 ILT |
5431 | case 'V': |
5432 | case 'S': | |
670a50eb ILT |
5433 | ip->insn_opcode |= regno << 11; |
5434 | break; | |
3d3c5039 ILT |
5435 | case 'W': |
5436 | case 'T': | |
670a50eb | 5437 | ip->insn_opcode |= regno << 16; |
d8a1c247 KR |
5438 | break; |
5439 | case 'R': | |
5440 | ip->insn_opcode |= regno << 21; | |
5441 | break; | |
3d3c5039 | 5442 | } |
670a50eb ILT |
5443 | lastregno = regno; |
5444 | continue; | |
3d3c5039 | 5445 | } |
670a50eb ILT |
5446 | switch (*args++) |
5447 | { | |
3d3c5039 | 5448 | case 'V': |
670a50eb ILT |
5449 | ip->insn_opcode |= lastregno << 11; |
5450 | continue; | |
3d3c5039 | 5451 | case 'W': |
670a50eb ILT |
5452 | ip->insn_opcode |= lastregno << 16; |
5453 | continue; | |
3d3c5039 | 5454 | } |
670a50eb | 5455 | break; |
3d3c5039 ILT |
5456 | |
5457 | case 'I': | |
670a50eb | 5458 | my_getExpression (&imm_expr, s); |
9753202d ILT |
5459 | if (imm_expr.X_op != O_big |
5460 | && imm_expr.X_op != O_constant) | |
5461 | insn_error = "absolute expression required"; | |
670a50eb ILT |
5462 | s = expr_end; |
5463 | continue; | |
3d3c5039 ILT |
5464 | |
5465 | case 'A': | |
670a50eb ILT |
5466 | my_getExpression (&offset_expr, s); |
5467 | imm_reloc = BFD_RELOC_32; | |
5468 | s = expr_end; | |
5469 | continue; | |
3d3c5039 ILT |
5470 | |
5471 | case 'F': | |
19ed8960 ILT |
5472 | case 'L': |
5473 | case 'f': | |
5474 | case 'l': | |
5475 | { | |
5476 | int f64; | |
5477 | char *save_in; | |
5478 | char *err; | |
5479 | unsigned char temp[8]; | |
604633ae ILT |
5480 | int len; |
5481 | unsigned int length; | |
19ed8960 ILT |
5482 | segT seg; |
5483 | subsegT subseg; | |
5484 | char *p; | |
5485 | ||
5486 | /* These only appear as the last operand in an | |
5487 | instruction, and every instruction that accepts | |
5488 | them in any variant accepts them in all variants. | |
5489 | This means we don't have to worry about backing out | |
5490 | any changes if the instruction does not match. | |
5491 | ||
5492 | The difference between them is the size of the | |
5493 | floating point constant and where it goes. For 'F' | |
5494 | and 'L' the constant is 64 bits; for 'f' and 'l' it | |
5495 | is 32 bits. Where the constant is placed is based | |
5496 | on how the MIPS assembler does things: | |
5497 | F -- .rdata | |
5498 | L -- .lit8 | |
5499 | f -- immediate value | |
5500 | l -- .lit4 | |
0dd2d296 | 5501 | |
55933a58 ILT |
5502 | The .lit4 and .lit8 sections are only used if |
5503 | permitted by the -G argument. | |
5504 | ||
5505 | When generating embedded PIC code, we use the | |
5506 | .lit8 section but not the .lit4 section (we can do | |
5507 | .lit4 inline easily; we need to put .lit8 | |
5508 | somewhere in the data segment, and using .lit8 | |
5509 | permits the linker to eventually combine identical | |
5510 | .lit8 entries). */ | |
19ed8960 ILT |
5511 | |
5512 | f64 = *args == 'F' || *args == 'L'; | |
5513 | ||
5514 | save_in = input_line_pointer; | |
5515 | input_line_pointer = s; | |
604633ae ILT |
5516 | err = md_atof (f64 ? 'd' : 'f', (char *) temp, &len); |
5517 | length = len; | |
19ed8960 ILT |
5518 | s = input_line_pointer; |
5519 | input_line_pointer = save_in; | |
5520 | if (err != NULL && *err != '\0') | |
5521 | { | |
5522 | as_bad ("Bad floating point constant: %s", err); | |
5523 | memset (temp, '\0', sizeof temp); | |
5524 | length = f64 ? 8 : 4; | |
5525 | } | |
5526 | ||
5527 | assert (length == (f64 ? 8 : 4)); | |
5528 | ||
0dd2d296 | 5529 | if (*args == 'f' |
55933a58 | 5530 | || (*args == 'l' |
1dc1e798 KR |
5531 | && (! USE_GLOBAL_POINTER_OPT |
5532 | || mips_pic == EMBEDDED_PIC | |
1113140a | 5533 | || g_switch_value < 4) |
1113140a | 5534 | )) |
19ed8960 ILT |
5535 | { |
5536 | imm_expr.X_op = O_constant; | |
5537 | if (byte_order == LITTLE_ENDIAN) | |
5538 | imm_expr.X_add_number = | |
5539 | (((((((int) temp[3] << 8) | |
5540 | | temp[2]) << 8) | |
5541 | | temp[1]) << 8) | |
5542 | | temp[0]); | |
5543 | else | |
5544 | imm_expr.X_add_number = | |
5545 | (((((((int) temp[0] << 8) | |
5546 | | temp[1]) << 8) | |
5547 | | temp[2]) << 8) | |
5548 | | temp[3]); | |
5549 | } | |
5550 | else | |
5551 | { | |
0dd2d296 ILT |
5552 | const char *newname; |
5553 | segT new_seg; | |
5554 | ||
19ed8960 ILT |
5555 | /* Switch to the right section. */ |
5556 | seg = now_seg; | |
5557 | subseg = now_subseg; | |
5558 | switch (*args) | |
5559 | { | |
0dd2d296 | 5560 | default: /* unused default case avoids warnings. */ |
19ed8960 | 5561 | case 'L': |
1113140a | 5562 | newname = RDATA_SECTION_NAME; |
1dc1e798 | 5563 | if (USE_GLOBAL_POINTER_OPT && g_switch_value >= 8) |
1113140a | 5564 | newname = ".lit8"; |
0dd2d296 ILT |
5565 | break; |
5566 | case 'F': | |
d2c71068 | 5567 | newname = RDATA_SECTION_NAME; |
19ed8960 ILT |
5568 | break; |
5569 | case 'l': | |
1dc1e798 KR |
5570 | assert (!USE_GLOBAL_POINTER_OPT |
5571 | || g_switch_value >= 4); | |
0dd2d296 | 5572 | newname = ".lit4"; |
19ed8960 ILT |
5573 | break; |
5574 | } | |
0dd2d296 | 5575 | new_seg = subseg_new (newname, (subsegT) 0); |
9b61d62b ILT |
5576 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
5577 | bfd_set_section_flags (stdoutput, new_seg, | |
5578 | (SEC_ALLOC | |
5579 | | SEC_LOAD | |
5580 | | SEC_READONLY | |
5581 | | SEC_DATA)); | |
0221ddf7 | 5582 | frag_align (*args == 'l' ? 2 : 3, 0); |
1dc1e798 KR |
5583 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) |
5584 | record_alignment (new_seg, 4); | |
5585 | else | |
5586 | record_alignment (new_seg, *args == 'l' ? 2 : 3); | |
19ed8960 ILT |
5587 | if (seg == now_seg) |
5588 | as_bad ("Can't use floating point insn in this section"); | |
5589 | ||
5590 | /* Set the argument to the current address in the | |
6e8dda9c | 5591 | section. */ |
19ed8960 ILT |
5592 | offset_expr.X_op = O_symbol; |
5593 | offset_expr.X_add_symbol = | |
5594 | symbol_new ("L0\001", now_seg, | |
5595 | (valueT) frag_now_fix (), frag_now); | |
5596 | offset_expr.X_add_number = 0; | |
5597 | ||
5598 | /* Put the floating point number into the section. */ | |
604633ae | 5599 | p = frag_more ((int) length); |
19ed8960 ILT |
5600 | memcpy (p, temp, length); |
5601 | ||
5602 | /* Switch back to the original section. */ | |
5603 | subseg_set (seg, subseg); | |
5604 | } | |
5605 | } | |
670a50eb ILT |
5606 | continue; |
5607 | ||
5608 | case 'i': /* 16 bit unsigned immediate */ | |
5609 | case 'j': /* 16 bit signed immediate */ | |
5610 | imm_reloc = BFD_RELOC_LO16; | |
5611 | c = my_getSmallExpression (&imm_expr, s); | |
344a8d61 | 5612 | if (c != '\0') |
670a50eb ILT |
5613 | { |
5614 | if (c != 'l') | |
5615 | { | |
5ac34ac3 | 5616 | if (imm_expr.X_op == O_constant) |
670a50eb ILT |
5617 | imm_expr.X_add_number = |
5618 | (imm_expr.X_add_number >> 16) & 0xffff; | |
5619 | else if (c == 'h') | |
867a58b3 ILT |
5620 | { |
5621 | imm_reloc = BFD_RELOC_HI16_S; | |
5622 | imm_unmatched_hi = true; | |
5623 | } | |
670a50eb ILT |
5624 | else |
5625 | imm_reloc = BFD_RELOC_HI16; | |
3d3c5039 | 5626 | } |
670a50eb | 5627 | } |
670a50eb ILT |
5628 | if (*args == 'i') |
5629 | { | |
344a8d61 | 5630 | if ((c == '\0' && imm_expr.X_op != O_constant) |
a8aed9dd ILT |
5631 | || ((imm_expr.X_add_number < 0 |
5632 | || imm_expr.X_add_number >= 0x10000) | |
5633 | && imm_expr.X_op == O_constant)) | |
99c24539 ILT |
5634 | { |
5635 | if (insn + 1 < &mips_opcodes[NUMOPCODES] && | |
5636 | !strcmp (insn->name, insn[1].name)) | |
5637 | break; | |
9753202d ILT |
5638 | if (imm_expr.X_op != O_constant |
5639 | && imm_expr.X_op != O_big) | |
5640 | insn_error = "absolute expression required"; | |
5641 | else | |
5642 | as_bad ("16 bit expression not in range 0..65535"); | |
99c24539 | 5643 | } |
670a50eb ILT |
5644 | } |
5645 | else | |
5646 | { | |
d9aba805 ILT |
5647 | int more; |
5648 | offsetT max; | |
5649 | ||
be22008b ILT |
5650 | /* The upper bound should be 0x8000, but |
5651 | unfortunately the MIPS assembler accepts numbers | |
5652 | from 0x8000 to 0xffff and sign extends them, and | |
d9aba805 ILT |
5653 | we want to be compatible. We only permit this |
5654 | extended range for an instruction which does not | |
5655 | provide any further alternates, since those | |
5656 | alternates may handle other cases. People should | |
5657 | use the numbers they mean, rather than relying on | |
5658 | a mysterious sign extension. */ | |
5659 | more = (insn + 1 < &mips_opcodes[NUMOPCODES] && | |
5660 | strcmp (insn->name, insn[1].name) == 0); | |
5661 | if (more) | |
5662 | max = 0x8000; | |
5663 | else | |
5664 | max = 0x10000; | |
344a8d61 | 5665 | if ((c == '\0' && imm_expr.X_op != O_constant) |
a8aed9dd ILT |
5666 | || ((imm_expr.X_add_number < -0x8000 |
5667 | || imm_expr.X_add_number >= max) | |
5668 | && imm_expr.X_op == O_constant) | |
d8a1c247 KR |
5669 | || (more |
5670 | && imm_expr.X_add_number < 0 | |
5671 | && mips_isa >= 3 | |
5672 | && imm_expr.X_unsigned | |
5673 | && sizeof (imm_expr.X_add_number) <= 4)) | |
99c24539 | 5674 | { |
d9aba805 | 5675 | if (more) |
99c24539 | 5676 | break; |
9753202d ILT |
5677 | if (imm_expr.X_op != O_constant |
5678 | && imm_expr.X_op != O_big) | |
5679 | insn_error = "absolute expression required"; | |
5680 | else | |
5681 | as_bad ("16 bit expression not in range -32768..32767"); | |
99c24539 | 5682 | } |
3d3c5039 | 5683 | } |
670a50eb ILT |
5684 | s = expr_end; |
5685 | continue; | |
5686 | ||
5687 | case 'o': /* 16 bit offset */ | |
5688 | c = my_getSmallExpression (&offset_expr, s); | |
f3645945 ILT |
5689 | |
5690 | /* If this value won't fit into a 16 bit offset, then go | |
5691 | find a macro that will generate the 32 bit offset | |
5692 | code pattern. As a special hack, we accept the | |
5693 | difference of two local symbols as a constant. This | |
5694 | is required to suppose embedded PIC switches, which | |
5695 | use an instruction which looks like | |
5696 | lw $4,$L12-$LS12($4) | |
5697 | The problem with handling this in a more general | |
5698 | fashion is that the macro function doesn't expect to | |
5699 | see anything which can be handled in a single | |
5700 | constant instruction. */ | |
6f0b87c3 SS |
5701 | if (c == 0 |
5702 | && (offset_expr.X_op != O_constant | |
5703 | || offset_expr.X_add_number >= 0x8000 | |
5704 | || offset_expr.X_add_number < -0x8000) | |
f3645945 ILT |
5705 | && (mips_pic != EMBEDDED_PIC |
5706 | || offset_expr.X_op != O_subtract | |
9da4c5d1 ILT |
5707 | || now_seg != text_section |
5708 | || (S_GET_SEGMENT (offset_expr.X_op_symbol) | |
5709 | != text_section))) | |
670a50eb | 5710 | break; |
3d3c5039 | 5711 | |
670a50eb ILT |
5712 | offset_reloc = BFD_RELOC_LO16; |
5713 | if (c == 'h' || c == 'H') | |
6e8dda9c ILT |
5714 | { |
5715 | assert (offset_expr.X_op == O_constant); | |
5716 | offset_expr.X_add_number = | |
5717 | (offset_expr.X_add_number >> 16) & 0xffff; | |
5718 | } | |
670a50eb ILT |
5719 | s = expr_end; |
5720 | continue; | |
5721 | ||
5722 | case 'p': /* pc relative offset */ | |
5723 | offset_reloc = BFD_RELOC_16_PCREL_S2; | |
5724 | my_getExpression (&offset_expr, s); | |
5725 | s = expr_end; | |
5726 | continue; | |
5727 | ||
5728 | case 'u': /* upper 16 bits */ | |
5729 | c = my_getSmallExpression (&imm_expr, s); | |
36a87ad7 ILT |
5730 | if (imm_expr.X_op == O_constant |
5731 | && (imm_expr.X_add_number < 0 | |
5732 | || imm_expr.X_add_number >= 0x10000)) | |
670a50eb ILT |
5733 | as_bad ("lui expression not in range 0..65535"); |
5734 | imm_reloc = BFD_RELOC_LO16; | |
5735 | if (c) | |
5736 | { | |
5737 | if (c != 'l') | |
5738 | { | |
5ac34ac3 | 5739 | if (imm_expr.X_op == O_constant) |
670a50eb ILT |
5740 | imm_expr.X_add_number = |
5741 | (imm_expr.X_add_number >> 16) & 0xffff; | |
5742 | else if (c == 'h') | |
867a58b3 ILT |
5743 | { |
5744 | imm_reloc = BFD_RELOC_HI16_S; | |
5745 | imm_unmatched_hi = true; | |
5746 | } | |
670a50eb ILT |
5747 | else |
5748 | imm_reloc = BFD_RELOC_HI16; | |
3d3c5039 ILT |
5749 | } |
5750 | } | |
670a50eb ILT |
5751 | s = expr_end; |
5752 | continue; | |
3d3c5039 | 5753 | |
670a50eb ILT |
5754 | case 'a': /* 26 bit address */ |
5755 | my_getExpression (&offset_expr, s); | |
5756 | s = expr_end; | |
5757 | offset_reloc = BFD_RELOC_MIPS_JMP; | |
5758 | continue; | |
3d3c5039 | 5759 | |
d8a1c247 KR |
5760 | case 'N': /* 3 bit branch condition code */ |
5761 | case 'M': /* 3 bit compare condition code */ | |
5762 | my_getExpression (&imm_expr, s); | |
5763 | check_absolute_expr (ip, &imm_expr); | |
5764 | if ((unsigned long) imm_expr.X_add_number > 7) | |
5765 | { | |
5766 | as_warn ("Condition code > 7 (%ld)", | |
5767 | (long) imm_expr.X_add_number); | |
5768 | imm_expr.X_add_number &= 7; | |
5769 | } | |
5770 | if (*args == 'N') | |
5771 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_BCC; | |
5772 | else | |
5773 | ip->insn_opcode |= imm_expr.X_add_number << OP_SH_CCC; | |
5774 | imm_expr.X_op = O_absent; | |
5775 | s = expr_end; | |
5776 | continue; | |
5777 | ||
3d3c5039 | 5778 | default: |
670a50eb ILT |
5779 | fprintf (stderr, "bad char = '%c'\n", *args); |
5780 | internalError (); | |
3d3c5039 | 5781 | } |
670a50eb | 5782 | break; |
3d3c5039 | 5783 | } |
670a50eb ILT |
5784 | /* Args don't match. */ |
5785 | if (insn + 1 < &mips_opcodes[NUMOPCODES] && | |
5786 | !strcmp (insn->name, insn[1].name)) | |
5787 | { | |
5788 | ++insn; | |
5789 | s = argsStart; | |
5790 | continue; | |
3d3c5039 | 5791 | } |
9753202d | 5792 | insn_error = "illegal operands"; |
670a50eb | 5793 | return; |
3d3c5039 ILT |
5794 | } |
5795 | } | |
5796 | ||
5797 | #define LP '(' | |
5798 | #define RP ')' | |
5799 | ||
5800 | static int | |
5801 | my_getSmallExpression (ep, str) | |
670a50eb ILT |
5802 | expressionS *ep; |
5803 | char *str; | |
3d3c5039 | 5804 | { |
670a50eb ILT |
5805 | char *sp; |
5806 | int c = 0; | |
5807 | ||
5808 | if (*str == ' ') | |
5809 | str++; | |
5810 | if (*str == LP | |
5811 | || (*str == '%' && | |
5812 | ((str[1] == 'h' && str[2] == 'i') | |
5813 | || (str[1] == 'H' && str[2] == 'I') | |
5814 | || (str[1] == 'l' && str[2] == 'o')) | |
5815 | && str[3] == LP)) | |
5816 | { | |
5817 | if (*str == LP) | |
5818 | c = 0; | |
5819 | else | |
5820 | { | |
5821 | c = str[1]; | |
5822 | str += 3; | |
5823 | } | |
5824 | ||
5825 | /* | |
5826 | * A small expression may be followed by a base register. | |
5827 | * Scan to the end of this operand, and then back over a possible | |
5828 | * base register. Then scan the small expression up to that | |
5829 | * point. (Based on code in sparc.c...) | |
5830 | */ | |
5831 | for (sp = str; *sp && *sp != ','; sp++) | |
5832 | ; | |
5833 | if (sp - 4 >= str && sp[-1] == RP) | |
5834 | { | |
5835 | if (isdigit (sp[-2])) | |
5836 | { | |
5837 | for (sp -= 3; sp >= str && isdigit (*sp); sp--) | |
5838 | ; | |
5839 | if (*sp == '$' && sp > str && sp[-1] == LP) | |
5840 | { | |
5841 | sp--; | |
5842 | goto do_it; | |
3d3c5039 | 5843 | } |
670a50eb ILT |
5844 | } |
5845 | else if (sp - 5 >= str | |
5846 | && sp[-5] == LP | |
5847 | && sp[-4] == '$' | |
5848 | && ((sp[-3] == 'f' && sp[-2] == 'p') | |
5849 | || (sp[-3] == 's' && sp[-2] == 'p') | |
5850 | || (sp[-3] == 'g' && sp[-2] == 'p') | |
5851 | || (sp[-3] == 'a' && sp[-2] == 't'))) | |
5852 | { | |
5853 | sp -= 5; | |
3d3c5039 | 5854 | do_it: |
670a50eb ILT |
5855 | if (sp == str) |
5856 | { | |
5857 | /* no expression means zero offset */ | |
5858 | if (c) | |
5859 | { | |
5860 | /* %xx(reg) is an error */ | |
5ac34ac3 | 5861 | ep->X_op = O_absent; |
670a50eb | 5862 | expr_end = str - 3; |
3d3c5039 | 5863 | } |
670a50eb ILT |
5864 | else |
5865 | { | |
52aa70b5 | 5866 | ep->X_op = O_constant; |
670a50eb ILT |
5867 | expr_end = sp; |
5868 | } | |
5869 | ep->X_add_symbol = NULL; | |
5ac34ac3 | 5870 | ep->X_op_symbol = NULL; |
670a50eb ILT |
5871 | ep->X_add_number = 0; |
5872 | } | |
5873 | else | |
5874 | { | |
5875 | *sp = '\0'; | |
5876 | my_getExpression (ep, str); | |
5877 | *sp = LP; | |
3d3c5039 | 5878 | } |
670a50eb | 5879 | return c; |
3d3c5039 ILT |
5880 | } |
5881 | } | |
5882 | } | |
670a50eb ILT |
5883 | my_getExpression (ep, str); |
5884 | return c; /* => %hi or %lo encountered */ | |
3d3c5039 ILT |
5885 | } |
5886 | ||
5887 | static void | |
5888 | my_getExpression (ep, str) | |
670a50eb ILT |
5889 | expressionS *ep; |
5890 | char *str; | |
3d3c5039 | 5891 | { |
670a50eb | 5892 | char *save_in; |
670a50eb ILT |
5893 | |
5894 | save_in = input_line_pointer; | |
5895 | input_line_pointer = str; | |
5ac34ac3 | 5896 | expression (ep); |
670a50eb ILT |
5897 | expr_end = input_line_pointer; |
5898 | input_line_pointer = save_in; | |
3d3c5039 ILT |
5899 | } |
5900 | ||
becfe05e ILT |
5901 | /* Turn a string in input_line_pointer into a floating point constant |
5902 | of type type, and store the appropriate bytes in *litP. The number | |
5903 | of LITTLENUMS emitted is stored in *sizeP . An error message is | |
5904 | returned, or NULL on OK. */ | |
5905 | ||
3d3c5039 | 5906 | char * |
670a50eb | 5907 | md_atof (type, litP, sizeP) |
becfe05e | 5908 | int type; |
3d3c5039 ILT |
5909 | char *litP; |
5910 | int *sizeP; | |
5911 | { | |
becfe05e ILT |
5912 | int prec; |
5913 | LITTLENUM_TYPE words[4]; | |
5914 | char *t; | |
5915 | int i; | |
5916 | ||
5917 | switch (type) | |
5918 | { | |
5919 | case 'f': | |
5920 | prec = 2; | |
5921 | break; | |
5922 | ||
5923 | case 'd': | |
5924 | prec = 4; | |
5925 | break; | |
5926 | ||
5927 | default: | |
5928 | *sizeP = 0; | |
5929 | return "bad call to md_atof"; | |
5930 | } | |
5931 | ||
5932 | t = atof_ieee (input_line_pointer, type, words); | |
5933 | if (t) | |
5934 | input_line_pointer = t; | |
5935 | ||
5936 | *sizeP = prec * 2; | |
5937 | ||
5938 | if (byte_order == LITTLE_ENDIAN) | |
5939 | { | |
5940 | for (i = prec - 1; i >= 0; i--) | |
5941 | { | |
5942 | md_number_to_chars (litP, (valueT) words[i], 2); | |
5943 | litP += 2; | |
5944 | } | |
5945 | } | |
5946 | else | |
5947 | { | |
5948 | for (i = 0; i < prec; i++) | |
5949 | { | |
5950 | md_number_to_chars (litP, (valueT) words[i], 2); | |
5951 | litP += 2; | |
5952 | } | |
5953 | } | |
5954 | ||
670a50eb | 5955 | return NULL; |
3d3c5039 ILT |
5956 | } |
5957 | ||
5958 | void | |
5959 | md_number_to_chars (buf, val, n) | |
5960 | char *buf; | |
918692a5 | 5961 | valueT val; |
3d3c5039 ILT |
5962 | int n; |
5963 | { | |
670a50eb ILT |
5964 | switch (byte_order) |
5965 | { | |
3d3c5039 | 5966 | case LITTLE_ENDIAN: |
13fe1379 ILT |
5967 | number_to_chars_littleendian (buf, val, n); |
5968 | break; | |
3d3c5039 ILT |
5969 | |
5970 | case BIG_ENDIAN: | |
13fe1379 ILT |
5971 | number_to_chars_bigendian (buf, val, n); |
5972 | break; | |
3d3c5039 ILT |
5973 | |
5974 | default: | |
670a50eb | 5975 | internalError (); |
3d3c5039 ILT |
5976 | } |
5977 | } | |
f3d817d8 | 5978 | \f |
e8d4d475 | 5979 | CONST char *md_shortopts = "O::g::G:"; |
1dc1e798 | 5980 | |
f3d817d8 DM |
5981 | struct option md_longopts[] = { |
5982 | #define OPTION_MIPS1 (OPTION_MD_BASE + 1) | |
5983 | {"mips0", no_argument, NULL, OPTION_MIPS1}, | |
5984 | {"mips1", no_argument, NULL, OPTION_MIPS1}, | |
5985 | #define OPTION_MIPS2 (OPTION_MD_BASE + 2) | |
5986 | {"mips2", no_argument, NULL, OPTION_MIPS2}, | |
5987 | #define OPTION_MIPS3 (OPTION_MD_BASE + 3) | |
5988 | {"mips3", no_argument, NULL, OPTION_MIPS3}, | |
d8a1c247 KR |
5989 | #define OPTION_MIPS4 (OPTION_MD_BASE + 4) |
5990 | {"mips4", no_argument, NULL, OPTION_MIPS4}, | |
5991 | #define OPTION_MCPU (OPTION_MD_BASE + 5) | |
f3d817d8 | 5992 | {"mcpu", required_argument, NULL, OPTION_MCPU}, |
d8a1c247 | 5993 | #define OPTION_MEMBEDDED_PIC (OPTION_MD_BASE + 6) |
f3d817d8 | 5994 | {"membedded-pic", no_argument, NULL, OPTION_MEMBEDDED_PIC}, |
d8a1c247 | 5995 | #define OPTION_TRAP (OPTION_MD_BASE + 9) |
f3d817d8 DM |
5996 | {"trap", no_argument, NULL, OPTION_TRAP}, |
5997 | {"no-break", no_argument, NULL, OPTION_TRAP}, | |
d8a1c247 | 5998 | #define OPTION_BREAK (OPTION_MD_BASE + 10) |
f3d817d8 DM |
5999 | {"break", no_argument, NULL, OPTION_BREAK}, |
6000 | {"no-trap", no_argument, NULL, OPTION_BREAK}, | |
d8a1c247 | 6001 | #define OPTION_EB (OPTION_MD_BASE + 11) |
e8d4d475 | 6002 | {"EB", no_argument, NULL, OPTION_EB}, |
d8a1c247 | 6003 | #define OPTION_EL (OPTION_MD_BASE + 12) |
e8d4d475 | 6004 | {"EL", no_argument, NULL, OPTION_EL}, |
d8a1c247 | 6005 | #define OPTION_M4650 (OPTION_MD_BASE + 13) |
b2b8c24e | 6006 | {"m4650", no_argument, NULL, OPTION_M4650}, |
d8a1c247 | 6007 | #define OPTION_NO_M4650 (OPTION_MD_BASE + 14) |
b2b8c24e | 6008 | {"no-m4650", no_argument, NULL, OPTION_NO_M4650}, |
e532b44c ILT |
6009 | #define OPTION_M4010 (OPTION_MD_BASE + 15) |
6010 | {"m4010", no_argument, NULL, OPTION_M4010}, | |
6011 | #define OPTION_NO_M4010 (OPTION_MD_BASE + 16) | |
6012 | {"no-m4010", no_argument, NULL, OPTION_NO_M4010}, | |
c625fc23 JSC |
6013 | #define OPTION_M4100 (OPTION_MD_BASE + 17) |
6014 | {"m4100", no_argument, NULL, OPTION_M4100}, | |
6015 | #define OPTION_NO_M4100 (OPTION_MD_BASE + 18) | |
6016 | {"no-m4100", no_argument, NULL, OPTION_NO_M4100}, | |
f3d817d8 | 6017 | |
d8a1c247 | 6018 | #define OPTION_CALL_SHARED (OPTION_MD_BASE + 7) |
1dc1e798 | 6019 | #define OPTION_NON_SHARED (OPTION_MD_BASE + 8) |
fb251650 | 6020 | #define OPTION_XGOT (OPTION_MD_BASE + 19) |
7f9880e5 ILT |
6021 | #define OPTION_32 (OPTION_MD_BASE + 20) |
6022 | #define OPTION_64 (OPTION_MD_BASE + 21) | |
1dc1e798 | 6023 | #ifdef OBJ_ELF |
f3d817d8 | 6024 | {"KPIC", no_argument, NULL, OPTION_CALL_SHARED}, |
fb251650 | 6025 | {"xgot", no_argument, NULL, OPTION_XGOT}, |
f3d817d8 | 6026 | {"call_shared", no_argument, NULL, OPTION_CALL_SHARED}, |
f3d817d8 | 6027 | {"non_shared", no_argument, NULL, OPTION_NON_SHARED}, |
7f9880e5 ILT |
6028 | {"32", no_argument, NULL, OPTION_32}, |
6029 | {"64", no_argument, NULL, OPTION_64}, | |
f3d817d8 DM |
6030 | #endif |
6031 | ||
6032 | {NULL, no_argument, NULL, 0} | |
6033 | }; | |
6034 | size_t md_longopts_size = sizeof(md_longopts); | |
3d3c5039 ILT |
6035 | |
6036 | int | |
f3d817d8 DM |
6037 | md_parse_option (c, arg) |
6038 | int c; | |
6039 | char *arg; | |
3d3c5039 | 6040 | { |
f3d817d8 | 6041 | switch (c) |
670a50eb | 6042 | { |
f3d817d8 DM |
6043 | case OPTION_TRAP: |
6044 | mips_trap = 1; | |
6045 | break; | |
670a50eb | 6046 | |
f3d817d8 DM |
6047 | case OPTION_BREAK: |
6048 | mips_trap = 0; | |
6049 | break; | |
6050 | ||
e8d4d475 | 6051 | case OPTION_EB: |
1dc1e798 | 6052 | target_big_endian = 1; |
e8d4d475 | 6053 | break; |
04cb3372 | 6054 | |
e8d4d475 | 6055 | case OPTION_EL: |
1dc1e798 | 6056 | target_big_endian = 0; |
f3d817d8 | 6057 | break; |
670a50eb | 6058 | |
f3d817d8 DM |
6059 | case 'O': |
6060 | if (arg && arg[1] == '0') | |
0aa07269 ILT |
6061 | mips_optimize = 1; |
6062 | else | |
6063 | mips_optimize = 2; | |
f3d817d8 | 6064 | break; |
0aa07269 | 6065 | |
f3d817d8 | 6066 | case 'g': |
22ba90ce ILT |
6067 | if (arg == NULL) |
6068 | mips_debug = 2; | |
6069 | else | |
6070 | mips_debug = atoi (arg); | |
6071 | /* When the MIPS assembler sees -g or -g2, it does not do | |
6072 | optimizations which limit full symbolic debugging. We take | |
6073 | that to be equivalent to -O0. */ | |
6074 | if (mips_debug == 2) | |
0aa07269 | 6075 | mips_optimize = 0; |
f3d817d8 | 6076 | break; |
4e95866e | 6077 | |
f3d817d8 DM |
6078 | case OPTION_MIPS1: |
6079 | mips_isa = 1; | |
4bb0cc41 ILT |
6080 | if (mips_cpu == -1) |
6081 | mips_cpu = 3000; | |
f3d817d8 | 6082 | break; |
8358c818 | 6083 | |
f3d817d8 DM |
6084 | case OPTION_MIPS2: |
6085 | mips_isa = 2; | |
4bb0cc41 ILT |
6086 | if (mips_cpu == -1) |
6087 | mips_cpu = 6000; | |
f3d817d8 | 6088 | break; |
8358c818 | 6089 | |
f3d817d8 DM |
6090 | case OPTION_MIPS3: |
6091 | mips_isa = 3; | |
4bb0cc41 ILT |
6092 | if (mips_cpu == -1) |
6093 | mips_cpu = 4000; | |
f3d817d8 | 6094 | break; |
8358c818 | 6095 | |
d8a1c247 KR |
6096 | case OPTION_MIPS4: |
6097 | mips_isa = 4; | |
6098 | if (mips_cpu == -1) | |
6099 | mips_cpu = 8000; | |
6100 | break; | |
6101 | ||
f3d817d8 DM |
6102 | case OPTION_MCPU: |
6103 | { | |
6104 | char *p; | |
6105 | ||
6106 | /* Identify the processor type */ | |
6107 | p = arg; | |
6108 | if (strcmp (p, "default") == 0 | |
6109 | || strcmp (p, "DEFAULT") == 0) | |
4bb0cc41 | 6110 | mips_cpu = -1; |
f3d817d8 DM |
6111 | else |
6112 | { | |
c625fc23 JSC |
6113 | int sv = 0; |
6114 | ||
6115 | /* We need to cope with the various "vr" prefixes for the 4300 | |
6116 | processor. */ | |
6117 | if (*p == 'v' || *p == 'V') | |
6118 | { | |
6119 | sv = 1; | |
6120 | p++; | |
6121 | } | |
6122 | ||
f3d817d8 DM |
6123 | if (*p == 'r' || *p == 'R') |
6124 | p++; | |
8358c818 | 6125 | |
4bb0cc41 | 6126 | mips_cpu = -1; |
f3d817d8 DM |
6127 | switch (*p) |
6128 | { | |
d8a1c247 KR |
6129 | case '1': |
6130 | if (strcmp (p, "10000") == 0 | |
6131 | || strcmp (p, "10k") == 0 | |
6132 | || strcmp (p, "10K") == 0) | |
6133 | mips_cpu = 10000; | |
6134 | break; | |
6135 | ||
f3d817d8 DM |
6136 | case '2': |
6137 | if (strcmp (p, "2000") == 0 | |
6138 | || strcmp (p, "2k") == 0 | |
6139 | || strcmp (p, "2K") == 0) | |
4bb0cc41 | 6140 | mips_cpu = 2000; |
f3d817d8 | 6141 | break; |
8358c818 | 6142 | |
f3d817d8 DM |
6143 | case '3': |
6144 | if (strcmp (p, "3000") == 0 | |
6145 | || strcmp (p, "3k") == 0 | |
6146 | || strcmp (p, "3K") == 0) | |
4bb0cc41 | 6147 | mips_cpu = 3000; |
f3d817d8 | 6148 | break; |
8358c818 | 6149 | |
f3d817d8 DM |
6150 | case '4': |
6151 | if (strcmp (p, "4000") == 0 | |
6152 | || strcmp (p, "4k") == 0 | |
8c63448a | 6153 | || strcmp (p, "4K") == 0) |
4bb0cc41 | 6154 | mips_cpu = 4000; |
c625fc23 JSC |
6155 | else if (strcmp (p, "4100") == 0) |
6156 | { | |
6157 | mips_cpu = 4100; | |
6158 | if (mips_4100 < 0) | |
6159 | mips_4100 = 1; | |
6160 | } | |
6161 | else if (strcmp (p, "4300") == 0) | |
6162 | mips_cpu = 4300; | |
8c63448a | 6163 | else if (strcmp (p, "4400") == 0) |
4bb0cc41 | 6164 | mips_cpu = 4400; |
8c63448a | 6165 | else if (strcmp (p, "4600") == 0) |
4bb0cc41 | 6166 | mips_cpu = 4600; |
b2b8c24e ILT |
6167 | else if (strcmp (p, "4650") == 0) |
6168 | { | |
6169 | mips_cpu = 4650; | |
6170 | if (mips_4650 < 0) | |
6171 | mips_4650 = 1; | |
6172 | } | |
e532b44c ILT |
6173 | else if (strcmp (p, "4010") == 0) |
6174 | { | |
6175 | mips_cpu = 4010; | |
6176 | if (mips_4010 < 0) | |
6177 | mips_4010 = 1; | |
6178 | } | |
f3d817d8 | 6179 | break; |
8358c818 | 6180 | |
f3d817d8 DM |
6181 | case '6': |
6182 | if (strcmp (p, "6000") == 0 | |
6183 | || strcmp (p, "6k") == 0 | |
6184 | || strcmp (p, "6K") == 0) | |
4bb0cc41 | 6185 | mips_cpu = 6000; |
f3d817d8 | 6186 | break; |
55933a58 | 6187 | |
d8a1c247 KR |
6188 | case '8': |
6189 | if (strcmp (p, "8000") == 0 | |
6190 | || strcmp (p, "8k") == 0 | |
6191 | || strcmp (p, "8K") == 0) | |
6192 | mips_cpu = 8000; | |
6193 | break; | |
6194 | ||
55933a58 ILT |
6195 | case 'o': |
6196 | if (strcmp (p, "orion") == 0) | |
4bb0cc41 | 6197 | mips_cpu = 4600; |
55933a58 | 6198 | break; |
f3d817d8 | 6199 | } |
8358c818 | 6200 | |
c625fc23 JSC |
6201 | if (sv && mips_cpu != 4300 && mips_cpu != 4100) |
6202 | { | |
6203 | as_bad ("ignoring invalid leading 'v' in -mcpu=%s switch", arg); | |
6204 | return 0; | |
6205 | } | |
6206 | ||
4bb0cc41 | 6207 | if (mips_cpu == -1) |
f3d817d8 DM |
6208 | { |
6209 | as_bad ("invalid architecture -mcpu=%s", arg); | |
6210 | return 0; | |
6211 | } | |
6212 | } | |
6213 | } | |
6214 | break; | |
8358c818 | 6215 | |
b2b8c24e ILT |
6216 | case OPTION_M4650: |
6217 | mips_4650 = 1; | |
6218 | break; | |
6219 | ||
6220 | case OPTION_NO_M4650: | |
6221 | mips_4650 = 0; | |
6222 | break; | |
6223 | ||
e532b44c ILT |
6224 | case OPTION_M4010: |
6225 | mips_4010 = 1; | |
6226 | break; | |
6227 | ||
6228 | case OPTION_NO_M4010: | |
6229 | mips_4010 = 0; | |
6230 | break; | |
6231 | ||
c625fc23 JSC |
6232 | case OPTION_M4100: |
6233 | mips_4100 = 1; | |
6234 | break; | |
6235 | ||
6236 | case OPTION_NO_M4100: | |
6237 | mips_4100 = 0; | |
6238 | break; | |
6239 | ||
f3d817d8 | 6240 | case OPTION_MEMBEDDED_PIC: |
d9aba805 | 6241 | mips_pic = EMBEDDED_PIC; |
1dc1e798 | 6242 | if (USE_GLOBAL_POINTER_OPT && g_switch_seen) |
f3d817d8 DM |
6243 | { |
6244 | as_bad ("-G may not be used with embedded PIC code"); | |
6245 | return 0; | |
6246 | } | |
5b63f465 | 6247 | g_switch_value = 0x7fffffff; |
f3d817d8 | 6248 | break; |
d9aba805 | 6249 | |
fb251650 ILT |
6250 | /* When generating ELF code, we permit -KPIC and -call_shared to |
6251 | select SVR4_PIC, and -non_shared to select no PIC. This is | |
6252 | intended to be compatible with Irix 5. */ | |
f3d817d8 | 6253 | case OPTION_CALL_SHARED: |
1dc1e798 KR |
6254 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
6255 | { | |
6256 | as_bad ("-call_shared is supported only for ELF format"); | |
6257 | return 0; | |
6258 | } | |
d9aba805 ILT |
6259 | mips_pic = SVR4_PIC; |
6260 | if (g_switch_seen && g_switch_value != 0) | |
f3d817d8 DM |
6261 | { |
6262 | as_bad ("-G may not be used with SVR4 PIC code"); | |
6263 | return 0; | |
6264 | } | |
d9aba805 | 6265 | g_switch_value = 0; |
f3d817d8 DM |
6266 | break; |
6267 | ||
6268 | case OPTION_NON_SHARED: | |
1dc1e798 KR |
6269 | if (OUTPUT_FLAVOR != bfd_target_elf_flavour) |
6270 | { | |
6271 | as_bad ("-non_shared is supported only for ELF format"); | |
6272 | return 0; | |
6273 | } | |
d9aba805 | 6274 | mips_pic = NO_PIC; |
f3d817d8 | 6275 | break; |
8358c818 | 6276 | |
fb251650 ILT |
6277 | /* The -xgot option tells the assembler to use 32 offsets when |
6278 | accessing the got in SVR4_PIC mode. It is for Irix | |
6279 | compatibility. */ | |
6280 | case OPTION_XGOT: | |
6281 | mips_big_got = 1; | |
6282 | break; | |
6283 | ||
f3d817d8 | 6284 | case 'G': |
1dc1e798 KR |
6285 | if (! USE_GLOBAL_POINTER_OPT) |
6286 | { | |
6287 | as_bad ("-G is not supported for this configuration"); | |
6288 | return 0; | |
6289 | } | |
6290 | else if (mips_pic == SVR4_PIC || mips_pic == EMBEDDED_PIC) | |
670a50eb | 6291 | { |
f3d817d8 DM |
6292 | as_bad ("-G may not be used with SVR4 or embedded PIC code"); |
6293 | return 0; | |
670a50eb ILT |
6294 | } |
6295 | else | |
f3d817d8 | 6296 | g_switch_value = atoi (arg); |
42562568 | 6297 | g_switch_seen = 1; |
f3d817d8 | 6298 | break; |
4e95866e | 6299 | |
7f9880e5 ILT |
6300 | /* The -32 and -64 options tell the assembler to output the 32 |
6301 | bit or the 64 bit MIPS ELF format. */ | |
6302 | case OPTION_32: | |
6303 | mips_64 = 0; | |
6304 | break; | |
6305 | ||
6306 | case OPTION_64: | |
9c44af60 ILT |
6307 | { |
6308 | const char **list, **l; | |
6309 | ||
6310 | list = bfd_target_list (); | |
6311 | for (l = list; *l != NULL; l++) | |
6312 | if (strcmp (*l, "elf64-bigmips") == 0 | |
6313 | || strcmp (*l, "elf64-littlemips") == 0) | |
6314 | break; | |
6315 | if (*l == NULL) | |
6316 | as_fatal ("No compiled in support for 64 bit object file format"); | |
6317 | free (list); | |
6318 | mips_64 = 1; | |
6319 | } | |
7f9880e5 ILT |
6320 | break; |
6321 | ||
f3d817d8 DM |
6322 | default: |
6323 | return 0; | |
8ea7f4e8 ILT |
6324 | } |
6325 | ||
f3d817d8 | 6326 | return 1; |
8ea7f4e8 ILT |
6327 | } |
6328 | ||
f3d817d8 DM |
6329 | void |
6330 | md_show_usage (stream) | |
6331 | FILE *stream; | |
6332 | { | |
6333 | fprintf(stream, "\ | |
6334 | MIPS options:\n\ | |
6335 | -membedded-pic generate embedded position independent code\n\ | |
f3d817d8 DM |
6336 | -EB generate big endian output\n\ |
6337 | -EL generate little endian output\n\ | |
6338 | -g, -g2 do not remove uneeded NOPs or swap branches\n\ | |
6339 | -G NUM allow referencing objects up to NUM bytes\n\ | |
6f0b87c3 SS |
6340 | implicitly with the gp register [default 8]\n"); |
6341 | fprintf(stream, "\ | |
f3d817d8 DM |
6342 | -mips1, -mcpu=r{2,3}000 generate code for r2000 and r3000\n\ |
6343 | -mips2, -mcpu=r6000 generate code for r6000\n\ | |
6344 | -mips3, -mcpu=r4000 generate code for r4000\n\ | |
d8a1c247 | 6345 | -mips4, -mcpu=r8000 generate code for r8000\n\ |
c625fc23 | 6346 | -mcpu=vr4300 generate code for vr4300\n\ |
fb251650 | 6347 | -mcpu=vr4100 generate code for vr4100\n\ |
e532b44c ILT |
6348 | -m4650 permit R4650 instructions\n\ |
6349 | -no-m4650 do not permit R4650 instructions\n\ | |
6350 | -m4010 permit R4010 instructions\n\ | |
6351 | -no-m4010 do not permit R4010 instructions\n\ | |
c625fc23 JSC |
6352 | -m4100 permit VR4100 instructions\n\ |
6353 | -no-m4100 do not permit VR4100 instructions\n"); | |
6354 | fprintf(stream, "\ | |
f3d817d8 DM |
6355 | -O0 remove unneeded NOPs, do not swap branches\n\ |
6356 | -O remove unneeded NOPs and swap branches\n\ | |
6357 | --trap, --no-break trap exception on div by 0 and mult overflow\n\ | |
6358 | --break, --no-trap break exception on div by 0 and mult overflow\n"); | |
6359 | #ifdef OBJ_ELF | |
6360 | fprintf(stream, "\ | |
6361 | -KPIC, -call_shared generate SVR4 position independent code\n\ | |
fb251650 | 6362 | -non_shared do not generate position independent code\n\ |
7f9880e5 ILT |
6363 | -xgot assume a 32 bit GOT\n\ |
6364 | -32 create 32 bit object file (default)\n\ | |
6365 | -64 create 64 bit object file\n"); | |
f3d817d8 DM |
6366 | #endif |
6367 | } | |
22ba90ce ILT |
6368 | |
6369 | void | |
6370 | mips_init_after_args () | |
6371 | { | |
6372 | if (target_big_endian) | |
6373 | byte_order = BIG_ENDIAN; | |
6374 | else | |
6375 | byte_order = LITTLE_ENDIAN; | |
6376 | } | |
f3d817d8 | 6377 | \f |
3d3c5039 ILT |
6378 | long |
6379 | md_pcrel_from (fixP) | |
6380 | fixS *fixP; | |
6381 | { | |
1dc1e798 KR |
6382 | if (OUTPUT_FLAVOR != bfd_target_aout_flavour |
6383 | && fixP->fx_addsy != (symbolS *) NULL | |
5b63f465 ILT |
6384 | && ! S_IS_DEFINED (fixP->fx_addsy)) |
6385 | { | |
6386 | /* This makes a branch to an undefined symbol be a branch to the | |
6387 | current location. */ | |
6388 | return 4; | |
6389 | } | |
5b63f465 | 6390 | |
670a50eb ILT |
6391 | /* return the address of the delay slot */ |
6392 | return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; | |
3d3c5039 ILT |
6393 | } |
6394 | ||
abdad6bc ILT |
6395 | /* This is called by emit_expr via TC_CONS_FIX_NEW when creating a |
6396 | reloc for a cons. We could use the definition there, except that | |
6397 | we want to handle 64 bit relocs specially. */ | |
6398 | ||
6399 | void | |
6400 | cons_fix_new_mips (frag, where, nbytes, exp) | |
6401 | fragS *frag; | |
6402 | int where; | |
6403 | unsigned int nbytes; | |
6404 | expressionS *exp; | |
6405 | { | |
6406 | /* If we are assembling in 32 bit mode, turn an 8 byte reloc into a | |
7f9880e5 ILT |
6407 | 4 byte reloc. */ |
6408 | if (nbytes == 8 && ! mips_64) | |
abdad6bc ILT |
6409 | { |
6410 | if (byte_order == BIG_ENDIAN) | |
6411 | where += 4; | |
6412 | nbytes = 4; | |
6413 | } | |
6414 | ||
7f9880e5 | 6415 | if (nbytes != 2 && nbytes != 4 && nbytes != 8) |
abdad6bc ILT |
6416 | as_bad ("Unsupported reloc size %d", nbytes); |
6417 | ||
6418 | fix_new_exp (frag_now, where, (int) nbytes, exp, 0, | |
7f9880e5 ILT |
6419 | (nbytes == 2 |
6420 | ? BFD_RELOC_16 | |
6421 | : (nbytes == 4 ? BFD_RELOC_32 : BFD_RELOC_64))); | |
abdad6bc ILT |
6422 | } |
6423 | ||
867a58b3 ILT |
6424 | /* Sort any unmatched HI16_S relocs so that they immediately precede |
6425 | the corresponding LO reloc. This is called before md_apply_fix and | |
6426 | tc_gen_reloc. Unmatched HI16_S relocs can only be generated by | |
6427 | explicit use of the %hi modifier. */ | |
6428 | ||
6429 | void | |
6430 | mips_frob_file () | |
6431 | { | |
6432 | struct mips_hi_fixup *l; | |
6433 | ||
6434 | for (l = mips_hi_fixup_list; l != NULL; l = l->next) | |
6435 | { | |
6436 | segment_info_type *seginfo; | |
9b61d62b | 6437 | int pass; |
867a58b3 ILT |
6438 | |
6439 | assert (l->fixp->fx_r_type == BFD_RELOC_HI16_S); | |
6440 | ||
6441 | /* Check quickly whether the next fixup happens to be a matching | |
6442 | %lo. */ | |
6443 | if (l->fixp->fx_next != NULL | |
6444 | && l->fixp->fx_next->fx_r_type == BFD_RELOC_LO16 | |
6445 | && l->fixp->fx_addsy == l->fixp->fx_next->fx_addsy | |
6446 | && l->fixp->fx_offset == l->fixp->fx_next->fx_offset) | |
6447 | continue; | |
6448 | ||
6449 | /* Look through the fixups for this segment for a matching %lo. | |
9b61d62b ILT |
6450 | When we find one, move the %hi just in front of it. We do |
6451 | this in two passes. In the first pass, we try to find a | |
6452 | unique %lo. In the second pass, we permit multiple %hi | |
6453 | relocs for a single %lo (this is a GNU extension). */ | |
867a58b3 | 6454 | seginfo = seg_info (l->seg); |
9b61d62b ILT |
6455 | for (pass = 0; pass < 2; pass++) |
6456 | { | |
6457 | fixS *f, *prev; | |
6458 | ||
6459 | prev = NULL; | |
6460 | for (f = seginfo->fix_root; f != NULL; f = f->fx_next) | |
867a58b3 | 6461 | { |
9b61d62b ILT |
6462 | /* Check whether this is a %lo fixup which matches l->fixp. */ |
6463 | if (f->fx_r_type == BFD_RELOC_LO16 | |
6464 | && f->fx_addsy == l->fixp->fx_addsy | |
6465 | && f->fx_offset == l->fixp->fx_offset | |
6466 | && (pass == 1 | |
6467 | || prev == NULL | |
6468 | || prev->fx_r_type != BFD_RELOC_HI16_S | |
6469 | || prev->fx_addsy != f->fx_addsy | |
6470 | || prev->fx_offset != f->fx_offset)) | |
6471 | { | |
6472 | fixS **pf; | |
867a58b3 | 6473 | |
9b61d62b ILT |
6474 | /* Move l->fixp before f. */ |
6475 | for (pf = &seginfo->fix_root; | |
6476 | *pf != l->fixp; | |
6477 | pf = &(*pf)->fx_next) | |
6478 | assert (*pf != NULL); | |
867a58b3 | 6479 | |
9b61d62b | 6480 | *pf = l->fixp->fx_next; |
867a58b3 | 6481 | |
9b61d62b ILT |
6482 | l->fixp->fx_next = f; |
6483 | if (prev == NULL) | |
6484 | seginfo->fix_root = l->fixp; | |
6485 | else | |
6486 | prev->fx_next = l->fixp; | |
867a58b3 | 6487 | |
9b61d62b ILT |
6488 | break; |
6489 | } | |
6490 | ||
6491 | prev = f; | |
867a58b3 ILT |
6492 | } |
6493 | ||
9b61d62b ILT |
6494 | if (f != NULL) |
6495 | break; | |
867a58b3 | 6496 | |
9b61d62b ILT |
6497 | if (pass == 1) |
6498 | as_warn_where (l->fixp->fx_file, l->fixp->fx_line, | |
6499 | "Unmatched %%hi reloc"); | |
6500 | } | |
867a58b3 ILT |
6501 | } |
6502 | } | |
6503 | ||
1c803e52 ILT |
6504 | /* When generating embedded PIC code we need to use a special |
6505 | relocation to represent the difference of two symbols in the .text | |
6506 | section (switch tables use a difference of this sort). See | |
6507 | include/coff/mips.h for details. This macro checks whether this | |
6508 | fixup requires the special reloc. */ | |
6509 | #define SWITCH_TABLE(fixp) \ | |
6510 | ((fixp)->fx_r_type == BFD_RELOC_32 \ | |
6511 | && (fixp)->fx_addsy != NULL \ | |
6512 | && (fixp)->fx_subsy != NULL \ | |
6513 | && S_GET_SEGMENT ((fixp)->fx_addsy) == text_section \ | |
6514 | && S_GET_SEGMENT ((fixp)->fx_subsy) == text_section) | |
6515 | ||
5b63f465 | 6516 | /* When generating embedded PIC code we must keep all PC relative |
1c803e52 ILT |
6517 | relocations, in case the linker has to relax a call. We also need |
6518 | to keep relocations for switch table entries. */ | |
5b63f465 ILT |
6519 | |
6520 | /*ARGSUSED*/ | |
6521 | int | |
6522 | mips_force_relocation (fixp) | |
6523 | fixS *fixp; | |
6524 | { | |
1c803e52 | 6525 | return (mips_pic == EMBEDDED_PIC |
ecd4ca1c ILT |
6526 | && (fixp->fx_pcrel |
6527 | || SWITCH_TABLE (fixp) | |
6528 | || fixp->fx_r_type == BFD_RELOC_PCREL_HI16_S | |
6529 | || fixp->fx_r_type == BFD_RELOC_PCREL_LO16)); | |
5b63f465 ILT |
6530 | } |
6531 | ||
6532 | /* Apply a fixup to the object file. */ | |
6533 | ||
3d3c5039 ILT |
6534 | int |
6535 | md_apply_fix (fixP, valueP) | |
6536 | fixS *fixP; | |
918692a5 | 6537 | valueT *valueP; |
3d3c5039 | 6538 | { |
670a50eb ILT |
6539 | unsigned char *buf; |
6540 | long insn, value; | |
3d3c5039 | 6541 | |
49ad0c4c | 6542 | assert (fixP->fx_size == 4 || fixP->fx_r_type == BFD_RELOC_16); |
3d3c5039 | 6543 | |
670a50eb ILT |
6544 | value = *valueP; |
6545 | fixP->fx_addnumber = value; /* Remember value for tc_gen_reloc */ | |
3d3c5039 | 6546 | |
5b63f465 ILT |
6547 | if (fixP->fx_addsy == NULL && ! fixP->fx_pcrel) |
6548 | fixP->fx_done = 1; | |
6549 | ||
670a50eb ILT |
6550 | switch (fixP->fx_r_type) |
6551 | { | |
3d3c5039 ILT |
6552 | case BFD_RELOC_MIPS_JMP: |
6553 | case BFD_RELOC_HI16: | |
6554 | case BFD_RELOC_HI16_S: | |
670a50eb | 6555 | case BFD_RELOC_MIPS_GPREL: |
9226253a ILT |
6556 | case BFD_RELOC_MIPS_LITERAL: |
6557 | case BFD_RELOC_MIPS_CALL16: | |
0dd2d296 ILT |
6558 | case BFD_RELOC_MIPS_GOT16: |
6559 | case BFD_RELOC_MIPS_GPREL32: | |
fb251650 ILT |
6560 | case BFD_RELOC_MIPS_GOT_HI16: |
6561 | case BFD_RELOC_MIPS_GOT_LO16: | |
6562 | case BFD_RELOC_MIPS_CALL_HI16: | |
6563 | case BFD_RELOC_MIPS_CALL_LO16: | |
ecd4ca1c | 6564 | if (fixP->fx_pcrel) |
7b777690 ILT |
6565 | as_bad_where (fixP->fx_file, fixP->fx_line, |
6566 | "Invalid PC relative reloc"); | |
670a50eb | 6567 | /* Nothing needed to do. The value comes from the reloc entry */ |
5b63f465 | 6568 | break; |
3d3c5039 | 6569 | |
ecd4ca1c ILT |
6570 | case BFD_RELOC_PCREL_HI16_S: |
6571 | /* The addend for this is tricky if it is internal, so we just | |
6572 | do everything here rather than in bfd_perform_relocation. */ | |
6573 | if ((fixP->fx_addsy->bsym->flags & BSF_SECTION_SYM) == 0) | |
6574 | { | |
6575 | /* For an external symbol adjust by the address to make it | |
6576 | pcrel_offset. We use the address of the RELLO reloc | |
6577 | which follows this one. */ | |
6578 | value += (fixP->fx_next->fx_frag->fr_address | |
6579 | + fixP->fx_next->fx_where); | |
6580 | } | |
6581 | if (value & 0x8000) | |
6582 | value += 0x10000; | |
6583 | value >>= 16; | |
0221ddf7 | 6584 | buf = (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where; |
ecd4ca1c ILT |
6585 | if (byte_order == BIG_ENDIAN) |
6586 | buf += 2; | |
6587 | md_number_to_chars (buf, value, 2); | |
6588 | break; | |
6589 | ||
6590 | case BFD_RELOC_PCREL_LO16: | |
6591 | /* The addend for this is tricky if it is internal, so we just | |
6592 | do everything here rather than in bfd_perform_relocation. */ | |
6593 | if ((fixP->fx_addsy->bsym->flags & BSF_SECTION_SYM) == 0) | |
6594 | value += fixP->fx_frag->fr_address + fixP->fx_where; | |
0221ddf7 | 6595 | buf = (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where; |
ecd4ca1c ILT |
6596 | if (byte_order == BIG_ENDIAN) |
6597 | buf += 2; | |
6598 | md_number_to_chars (buf, value, 2); | |
6599 | break; | |
6600 | ||
f3645945 ILT |
6601 | case BFD_RELOC_32: |
6602 | /* If we are deleting this reloc entry, we must fill in the | |
6603 | value now. This can happen if we have a .word which is not | |
1c803e52 ILT |
6604 | resolved when it appears but is later defined. We also need |
6605 | to fill in the value if this is an embedded PIC switch table | |
6606 | entry. */ | |
6607 | if (fixP->fx_done | |
6608 | || (mips_pic == EMBEDDED_PIC && SWITCH_TABLE (fixP))) | |
f3645945 ILT |
6609 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, |
6610 | value, 4); | |
6611 | break; | |
6612 | ||
49ad0c4c ILT |
6613 | case BFD_RELOC_16: |
6614 | /* If we are deleting this reloc entry, we must fill in the | |
6615 | value now. */ | |
6616 | assert (fixP->fx_size == 2); | |
6617 | if (fixP->fx_done) | |
6618 | md_number_to_chars (fixP->fx_frag->fr_literal + fixP->fx_where, | |
6619 | value, 2); | |
6620 | break; | |
6621 | ||
f3645945 ILT |
6622 | case BFD_RELOC_LO16: |
6623 | /* When handling an embedded PIC switch statement, we can wind | |
6624 | up deleting a LO16 reloc. See the 'o' case in mips_ip. */ | |
6625 | if (fixP->fx_done) | |
6626 | { | |
6627 | if (value < -0x8000 || value > 0x7fff) | |
6628 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6629 | "relocation overflow"); | |
0221ddf7 | 6630 | buf = (unsigned char *) fixP->fx_frag->fr_literal + fixP->fx_where; |
f3645945 ILT |
6631 | if (byte_order == BIG_ENDIAN) |
6632 | buf += 2; | |
6633 | md_number_to_chars (buf, value, 2); | |
6634 | } | |
6635 | break; | |
6636 | ||
3d3c5039 | 6637 | case BFD_RELOC_16_PCREL_S2: |
670a50eb ILT |
6638 | /* |
6639 | * We need to save the bits in the instruction since fixup_segment() | |
6640 | * might be deleting the relocation entry (i.e., a branch within | |
6641 | * the current segment). | |
6642 | */ | |
6643 | if (value & 0x3) | |
7b777690 ILT |
6644 | as_warn_where (fixP->fx_file, fixP->fx_line, |
6645 | "Branch to odd address (%lx)", value); | |
670a50eb | 6646 | value >>= 2; |
670a50eb ILT |
6647 | |
6648 | /* update old instruction data */ | |
6649 | buf = (unsigned char *) (fixP->fx_where + fixP->fx_frag->fr_literal); | |
6650 | switch (byte_order) | |
6651 | { | |
3d3c5039 | 6652 | case LITTLE_ENDIAN: |
670a50eb ILT |
6653 | insn = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0]; |
6654 | break; | |
3d3c5039 ILT |
6655 | |
6656 | case BIG_ENDIAN: | |
670a50eb ILT |
6657 | insn = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3]; |
6658 | break; | |
3d3c5039 ILT |
6659 | |
6660 | default: | |
670a50eb ILT |
6661 | internalError (); |
6662 | return 0; | |
3d3c5039 | 6663 | } |
9da4c5d1 ILT |
6664 | |
6665 | if (value >= -0x8000 && value < 0x8000) | |
6666 | insn |= value & 0xffff; | |
6667 | else | |
6668 | { | |
6669 | /* The branch offset is too large. If this is an | |
6670 | unconditional branch, and we are not generating PIC code, | |
6671 | we can convert it to an absolute jump instruction. */ | |
6672 | if (mips_pic == NO_PIC | |
6673 | && fixP->fx_done | |
6674 | && fixP->fx_frag->fr_address >= text_section->vma | |
6675 | && (fixP->fx_frag->fr_address | |
6676 | < text_section->vma + text_section->_raw_size) | |
6677 | && ((insn & 0xffff0000) == 0x10000000 /* beq $0,$0 */ | |
6678 | || (insn & 0xffff0000) == 0x04010000 /* bgez $0 */ | |
6679 | || (insn & 0xffff0000) == 0x04110000)) /* bgezal $0 */ | |
6680 | { | |
6681 | if ((insn & 0xffff0000) == 0x04110000) /* bgezal $0 */ | |
6682 | insn = 0x0c000000; /* jal */ | |
6683 | else | |
6684 | insn = 0x08000000; /* j */ | |
6685 | fixP->fx_r_type = BFD_RELOC_MIPS_JMP; | |
6686 | fixP->fx_done = 0; | |
6687 | fixP->fx_addsy = section_symbol (text_section); | |
6688 | fixP->fx_addnumber = (value << 2) + md_pcrel_from (fixP); | |
6689 | } | |
6690 | else | |
6691 | { | |
6692 | /* FIXME. It would be possible in principle to handle | |
6693 | conditional branches which overflow. They could be | |
6694 | transformed into a branch around a jump. This would | |
6695 | require setting up variant frags for each different | |
6696 | branch type. The native MIPS assembler attempts to | |
6697 | handle these cases, but it appears to do it | |
6698 | incorrectly. */ | |
6699 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
6700 | "Relocation overflow"); | |
6701 | } | |
6702 | } | |
6703 | ||
604633ae | 6704 | md_number_to_chars ((char *) buf, (valueT) insn, 4); |
670a50eb | 6705 | break; |
3d3c5039 ILT |
6706 | |
6707 | default: | |
670a50eb | 6708 | internalError (); |
3d3c5039 | 6709 | } |
5b63f465 | 6710 | |
670a50eb | 6711 | return 1; |
3d3c5039 ILT |
6712 | } |
6713 | ||
6714 | #if 0 | |
6715 | void | |
670a50eb ILT |
6716 | printInsn (oc) |
6717 | unsigned long oc; | |
3d3c5039 | 6718 | { |
670a50eb ILT |
6719 | const struct mips_opcode *p; |
6720 | int treg, sreg, dreg, shamt; | |
6721 | short imm; | |
6722 | const char *args; | |
6723 | int i; | |
3d3c5039 | 6724 | |
670a50eb ILT |
6725 | for (i = 0; i < NUMOPCODES; ++i) |
6726 | { | |
6727 | p = &mips_opcodes[i]; | |
6728 | if (((oc & p->mask) == p->match) && (p->pinfo != INSN_MACRO)) | |
6729 | { | |
6730 | printf ("%08lx %s\t", oc, p->name); | |
6731 | treg = (oc >> 16) & 0x1f; | |
6732 | sreg = (oc >> 21) & 0x1f; | |
6733 | dreg = (oc >> 11) & 0x1f; | |
6734 | shamt = (oc >> 6) & 0x1f; | |
6735 | imm = oc; | |
6736 | for (args = p->args;; ++args) | |
6737 | { | |
6738 | switch (*args) | |
6739 | { | |
3d3c5039 | 6740 | case '\0': |
670a50eb ILT |
6741 | printf ("\n"); |
6742 | break; | |
3d3c5039 ILT |
6743 | |
6744 | case ',': | |
6745 | case '(': | |
6746 | case ')': | |
670a50eb ILT |
6747 | printf ("%c", *args); |
6748 | continue; | |
3d3c5039 ILT |
6749 | |
6750 | case 'r': | |
670a50eb ILT |
6751 | assert (treg == sreg); |
6752 | printf ("$%d,$%d", treg, sreg); | |
6753 | continue; | |
3d3c5039 ILT |
6754 | |
6755 | case 'd': | |
918692a5 | 6756 | case 'G': |
670a50eb ILT |
6757 | printf ("$%d", dreg); |
6758 | continue; | |
3d3c5039 ILT |
6759 | |
6760 | case 't': | |
918692a5 | 6761 | case 'E': |
670a50eb ILT |
6762 | printf ("$%d", treg); |
6763 | continue; | |
3d3c5039 | 6764 | |
9226253a ILT |
6765 | case 'k': |
6766 | printf ("0x%x", treg); | |
6767 | continue; | |
6768 | ||
3d3c5039 ILT |
6769 | case 'b': |
6770 | case 's': | |
670a50eb ILT |
6771 | printf ("$%d", sreg); |
6772 | continue; | |
3d3c5039 ILT |
6773 | |
6774 | case 'a': | |
670a50eb ILT |
6775 | printf ("0x%08lx", oc & 0x1ffffff); |
6776 | continue; | |
3d3c5039 ILT |
6777 | |
6778 | case 'i': | |
6779 | case 'j': | |
6780 | case 'o': | |
6781 | case 'u': | |
670a50eb ILT |
6782 | printf ("%d", imm); |
6783 | continue; | |
3d3c5039 ILT |
6784 | |
6785 | case '<': | |
56c96faa | 6786 | case '>': |
670a50eb ILT |
6787 | printf ("$%d", shamt); |
6788 | continue; | |
3d3c5039 ILT |
6789 | |
6790 | default: | |
670a50eb | 6791 | internalError (); |
3d3c5039 | 6792 | } |
670a50eb | 6793 | break; |
3d3c5039 | 6794 | } |
670a50eb | 6795 | return; |
3d3c5039 ILT |
6796 | } |
6797 | } | |
670a50eb | 6798 | printf ("%08lx UNDEFINED\n", oc); |
3d3c5039 ILT |
6799 | } |
6800 | #endif | |
6801 | ||
6802 | static symbolS * | |
6803 | get_symbol () | |
6804 | { | |
670a50eb ILT |
6805 | int c; |
6806 | char *name; | |
6807 | symbolS *p; | |
6808 | ||
6809 | name = input_line_pointer; | |
6810 | c = get_symbol_end (); | |
6811 | p = (symbolS *) symbol_find_or_make (name); | |
6812 | *input_line_pointer = c; | |
6813 | return p; | |
3d3c5039 ILT |
6814 | } |
6815 | ||
becfe05e ILT |
6816 | /* Align the current frag to a given power of two. The MIPS assembler |
6817 | also automatically adjusts any preceding label. */ | |
6818 | ||
6819 | static void | |
23dc1ae3 | 6820 | mips_align (to, fill, label) |
becfe05e ILT |
6821 | int to; |
6822 | int fill; | |
23dc1ae3 | 6823 | symbolS *label; |
becfe05e ILT |
6824 | { |
6825 | mips_emit_delays (); | |
6826 | frag_align (to, fill); | |
6827 | record_alignment (now_seg, to); | |
23dc1ae3 | 6828 | if (label != NULL) |
becfe05e | 6829 | { |
23dc1ae3 ILT |
6830 | assert (S_GET_SEGMENT (label) == now_seg); |
6831 | label->sy_frag = frag_now; | |
6832 | S_SET_VALUE (label, (valueT) frag_now_fix ()); | |
becfe05e ILT |
6833 | } |
6834 | } | |
6835 | ||
6836 | /* Align to a given power of two. .align 0 turns off the automatic | |
6837 | alignment used by the data creating pseudo-ops. */ | |
6838 | ||
3d3c5039 ILT |
6839 | static void |
6840 | s_align (x) | |
6841 | int x; | |
6842 | { | |
670a50eb ILT |
6843 | register int temp; |
6844 | register long temp_fill; | |
6845 | long max_alignment = 15; | |
3d3c5039 | 6846 | |
670a50eb | 6847 | /* |
3d3c5039 ILT |
6848 | |
6849 | o Note that the assembler pulls down any immediately preceeding label | |
6850 | to the aligned address. | |
6851 | o It's not documented but auto alignment is reinstated by | |
6852 | a .align pseudo instruction. | |
6853 | o Note also that after auto alignment is turned off the mips assembler | |
6854 | issues an error on attempt to assemble an improperly aligned data item. | |
6855 | We don't. | |
6856 | ||
6857 | */ | |
6858 | ||
670a50eb ILT |
6859 | temp = get_absolute_expression (); |
6860 | if (temp > max_alignment) | |
6861 | as_bad ("Alignment too large: %d. assumed.", temp = max_alignment); | |
6862 | else if (temp < 0) | |
6863 | { | |
6864 | as_warn ("Alignment negative: 0 assumed."); | |
6865 | temp = 0; | |
6866 | } | |
6867 | if (*input_line_pointer == ',') | |
6868 | { | |
6869 | input_line_pointer++; | |
6870 | temp_fill = get_absolute_expression (); | |
6871 | } | |
6872 | else | |
6873 | temp_fill = 0; | |
6874 | if (temp) | |
6875 | { | |
6876 | auto_align = 1; | |
23dc1ae3 | 6877 | mips_align (temp, (int) temp_fill, insn_label); |
3d3c5039 | 6878 | } |
670a50eb ILT |
6879 | else |
6880 | { | |
6881 | auto_align = 0; | |
3d3c5039 ILT |
6882 | } |
6883 | ||
670a50eb | 6884 | demand_empty_rest_of_line (); |
3d3c5039 ILT |
6885 | } |
6886 | ||
739708fa KR |
6887 | void |
6888 | mips_flush_pending_output () | |
becfe05e ILT |
6889 | { |
6890 | mips_emit_delays (); | |
1849d646 | 6891 | insn_label = NULL; |
becfe05e ILT |
6892 | } |
6893 | ||
3d3c5039 ILT |
6894 | static void |
6895 | s_change_sec (sec) | |
6896 | int sec; | |
6897 | { | |
88225433 | 6898 | segT seg; |
becfe05e | 6899 | |
5b63f465 ILT |
6900 | /* When generating embedded PIC code, we only use the .text, .lit8, |
6901 | .sdata and .sbss sections. We change the .data and .rdata | |
6902 | pseudo-ops to use .sdata. */ | |
6903 | if (mips_pic == EMBEDDED_PIC | |
6904 | && (sec == 'd' || sec == 'r')) | |
6905 | sec = 's'; | |
6906 | ||
becfe05e | 6907 | mips_emit_delays (); |
670a50eb ILT |
6908 | switch (sec) |
6909 | { | |
3d3c5039 | 6910 | case 't': |
604633ae | 6911 | s_text (0); |
670a50eb | 6912 | break; |
3d3c5039 | 6913 | case 'd': |
604633ae | 6914 | s_data (0); |
670a50eb | 6915 | break; |
3d3c5039 | 6916 | case 'b': |
670a50eb | 6917 | subseg_set (bss_section, (subsegT) get_absolute_expression ()); |
670a50eb ILT |
6918 | demand_empty_rest_of_line (); |
6919 | break; | |
88225433 ILT |
6920 | |
6921 | case 'r': | |
1dc1e798 KR |
6922 | if (USE_GLOBAL_POINTER_OPT) |
6923 | { | |
6924 | seg = subseg_new (RDATA_SECTION_NAME, | |
6925 | (subsegT) get_absolute_expression ()); | |
6926 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) | |
6927 | { | |
6928 | bfd_set_section_flags (stdoutput, seg, | |
6929 | (SEC_ALLOC | |
6930 | | SEC_LOAD | |
6931 | | SEC_READONLY | |
6932 | | SEC_RELOC | |
6933 | | SEC_DATA)); | |
6934 | bfd_set_section_alignment (stdoutput, seg, 4); | |
6935 | } | |
6936 | demand_empty_rest_of_line (); | |
6937 | } | |
6938 | else | |
6939 | { | |
6940 | as_bad ("No read only data section in this object file format"); | |
6941 | demand_empty_rest_of_line (); | |
6942 | return; | |
6943 | } | |
88225433 | 6944 | break; |
88225433 ILT |
6945 | |
6946 | case 's': | |
1dc1e798 KR |
6947 | if (USE_GLOBAL_POINTER_OPT) |
6948 | { | |
6949 | seg = subseg_new (".sdata", (subsegT) get_absolute_expression ()); | |
6950 | if (OUTPUT_FLAVOR == bfd_target_elf_flavour) | |
6951 | { | |
6952 | bfd_set_section_flags (stdoutput, seg, | |
6953 | SEC_ALLOC | SEC_LOAD | SEC_RELOC | |
6954 | | SEC_DATA); | |
6955 | bfd_set_section_alignment (stdoutput, seg, 4); | |
6956 | } | |
6957 | demand_empty_rest_of_line (); | |
6958 | break; | |
6959 | } | |
6960 | else | |
6961 | { | |
6962 | as_bad ("Global pointers not supported; recompile -G 0"); | |
6963 | demand_empty_rest_of_line (); | |
6964 | return; | |
6965 | } | |
3d3c5039 | 6966 | } |
88225433 | 6967 | |
670a50eb | 6968 | auto_align = 1; |
3d3c5039 ILT |
6969 | } |
6970 | ||
739708fa KR |
6971 | void |
6972 | mips_enable_auto_align () | |
9da4c5d1 | 6973 | { |
9da4c5d1 ILT |
6974 | auto_align = 1; |
6975 | } | |
6976 | ||
3d3c5039 ILT |
6977 | static void |
6978 | s_cons (log_size) | |
6979 | int log_size; | |
6980 | { | |
23dc1ae3 ILT |
6981 | symbolS *label; |
6982 | ||
6983 | label = insn_label; | |
becfe05e | 6984 | mips_emit_delays (); |
670a50eb | 6985 | if (log_size > 0 && auto_align) |
23dc1ae3 | 6986 | mips_align (log_size, 0, label); |
1849d646 | 6987 | insn_label = NULL; |
670a50eb | 6988 | cons (1 << log_size); |
3d3c5039 ILT |
6989 | } |
6990 | ||
3d3c5039 | 6991 | static void |
becfe05e ILT |
6992 | s_float_cons (type) |
6993 | int type; | |
3d3c5039 | 6994 | { |
23dc1ae3 ILT |
6995 | symbolS *label; |
6996 | ||
6997 | label = insn_label; | |
6998 | ||
becfe05e | 6999 | mips_emit_delays (); |
670a50eb ILT |
7000 | |
7001 | if (auto_align) | |
becfe05e | 7002 | if (type == 'd') |
23dc1ae3 | 7003 | mips_align (3, 0, label); |
670a50eb | 7004 | else |
23dc1ae3 | 7005 | mips_align (2, 0, label); |
670a50eb | 7006 | |
1849d646 ILT |
7007 | insn_label = NULL; |
7008 | ||
becfe05e | 7009 | float_cons (type); |
3d3c5039 ILT |
7010 | } |
7011 | ||
c1444ec4 ILT |
7012 | /* Handle .globl. We need to override it because on Irix 5 you are |
7013 | permitted to say | |
7014 | .globl foo .text | |
7015 | where foo is an undefined symbol, to mean that foo should be | |
7016 | considered to be the address of a function. */ | |
7017 | ||
7018 | static void | |
7019 | s_mips_globl (x) | |
7020 | int x; | |
7021 | { | |
7022 | char *name; | |
7023 | int c; | |
7024 | symbolS *symbolP; | |
fb251650 | 7025 | flagword flag; |
c1444ec4 ILT |
7026 | |
7027 | name = input_line_pointer; | |
7028 | c = get_symbol_end (); | |
7029 | symbolP = symbol_find_or_make (name); | |
7030 | *input_line_pointer = c; | |
7031 | SKIP_WHITESPACE (); | |
fb251650 ILT |
7032 | |
7033 | /* On Irix 5, every global symbol that is not explicitly labelled as | |
7034 | being a function is apparently labelled as being an object. */ | |
7035 | flag = BSF_OBJECT; | |
7036 | ||
c1444ec4 ILT |
7037 | if (! is_end_of_line[(unsigned char) *input_line_pointer]) |
7038 | { | |
7039 | char *secname; | |
7040 | asection *sec; | |
7041 | ||
7042 | secname = input_line_pointer; | |
7043 | c = get_symbol_end (); | |
7044 | sec = bfd_get_section_by_name (stdoutput, secname); | |
7045 | if (sec == NULL) | |
7046 | as_bad ("%s: no such section", secname); | |
7047 | *input_line_pointer = c; | |
7048 | ||
7049 | if (sec != NULL && (sec->flags & SEC_CODE) != 0) | |
fb251650 | 7050 | flag = BSF_FUNCTION; |
c1444ec4 ILT |
7051 | } |
7052 | ||
fb251650 ILT |
7053 | symbolP->bsym->flags |= flag; |
7054 | ||
c1444ec4 ILT |
7055 | S_SET_EXTERNAL (symbolP); |
7056 | demand_empty_rest_of_line (); | |
7057 | } | |
7058 | ||
3d3c5039 ILT |
7059 | static void |
7060 | s_option (x) | |
7061 | int x; | |
7062 | { | |
dd3f1f76 ILT |
7063 | char *opt; |
7064 | char c; | |
7065 | ||
7066 | opt = input_line_pointer; | |
7067 | c = get_symbol_end (); | |
7068 | ||
dd3f1f76 | 7069 | if (*opt == 'O') |
9226253a ILT |
7070 | { |
7071 | /* FIXME: What does this mean? */ | |
7072 | } | |
dd3f1f76 | 7073 | else if (strncmp (opt, "pic", 3) == 0) |
9226253a | 7074 | { |
d9aba805 | 7075 | int i; |
42562568 | 7076 | |
d9aba805 ILT |
7077 | i = atoi (opt + 3); |
7078 | if (i == 0) | |
7079 | mips_pic = NO_PIC; | |
7080 | else if (i == 2) | |
7081 | mips_pic = SVR4_PIC; | |
7082 | else | |
7083 | as_bad (".option pic%d not supported", i); | |
7084 | ||
1dc1e798 | 7085 | if (USE_GLOBAL_POINTER_OPT && mips_pic == SVR4_PIC) |
42562568 ILT |
7086 | { |
7087 | if (g_switch_seen && g_switch_value != 0) | |
d9aba805 | 7088 | as_warn ("-G may not be used with SVR4 PIC code"); |
42562568 ILT |
7089 | g_switch_value = 0; |
7090 | bfd_set_gp_size (stdoutput, 0); | |
7091 | } | |
9226253a | 7092 | } |
dd3f1f76 ILT |
7093 | else |
7094 | as_warn ("Unrecognized option \"%s\"", opt); | |
7095 | ||
7096 | *input_line_pointer = c; | |
670a50eb | 7097 | demand_empty_rest_of_line (); |
3d3c5039 ILT |
7098 | } |
7099 | ||
7100 | static void | |
7101 | s_mipsset (x) | |
7102 | int x; | |
7103 | { | |
670a50eb ILT |
7104 | char *name = input_line_pointer, ch; |
7105 | ||
7106 | while (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
7107 | input_line_pointer++; | |
7108 | ch = *input_line_pointer; | |
7109 | *input_line_pointer = '\0'; | |
7110 | ||
7111 | if (strcmp (name, "reorder") == 0) | |
7112 | { | |
4e95866e ILT |
7113 | if (mips_noreorder) |
7114 | { | |
7115 | prev_insn_unreordered = 1; | |
7116 | prev_prev_insn_unreordered = 1; | |
7117 | } | |
670a50eb ILT |
7118 | mips_noreorder = 0; |
7119 | } | |
7120 | else if (strcmp (name, "noreorder") == 0) | |
7121 | { | |
becfe05e | 7122 | mips_emit_delays (); |
670a50eb | 7123 | mips_noreorder = 1; |
0dd2d296 | 7124 | mips_any_noreorder = 1; |
670a50eb ILT |
7125 | } |
7126 | else if (strcmp (name, "at") == 0) | |
7127 | { | |
7128 | mips_noat = 0; | |
7129 | } | |
7130 | else if (strcmp (name, "noat") == 0) | |
7131 | { | |
7132 | mips_noat = 1; | |
3d3c5039 | 7133 | } |
670a50eb ILT |
7134 | else if (strcmp (name, "macro") == 0) |
7135 | { | |
7136 | mips_warn_about_macros = 0; | |
7137 | } | |
7138 | else if (strcmp (name, "nomacro") == 0) | |
7139 | { | |
7140 | if (mips_noreorder == 0) | |
7141 | as_bad ("`noreorder' must be set before `nomacro'"); | |
7142 | mips_warn_about_macros = 1; | |
7143 | } | |
7144 | else if (strcmp (name, "move") == 0 || strcmp (name, "novolatile") == 0) | |
7145 | { | |
7146 | mips_nomove = 0; | |
7147 | } | |
7148 | else if (strcmp (name, "nomove") == 0 || strcmp (name, "volatile") == 0) | |
7149 | { | |
7150 | mips_nomove = 1; | |
7151 | } | |
7152 | else if (strcmp (name, "bopt") == 0) | |
7153 | { | |
7154 | mips_nobopt = 0; | |
7155 | } | |
7156 | else if (strcmp (name, "nobopt") == 0) | |
7157 | { | |
7158 | mips_nobopt = 1; | |
7159 | } | |
1051c97f ILT |
7160 | else if (strncmp (name, "mips", 4) == 0) |
7161 | { | |
7162 | int isa; | |
7163 | ||
7164 | /* Permit the user to change the ISA on the fly. Needless to | |
7165 | say, misuse can cause serious problems. */ | |
7166 | isa = atoi (name + 4); | |
7167 | if (isa == 0) | |
7168 | mips_isa = file_mips_isa; | |
d8a1c247 | 7169 | else if (isa < 1 || isa > 4) |
1051c97f ILT |
7170 | as_bad ("unknown ISA level"); |
7171 | else | |
7172 | mips_isa = isa; | |
7173 | } | |
670a50eb ILT |
7174 | else |
7175 | { | |
7176 | as_warn ("Tried to set unrecognized symbol: %s\n", name); | |
7177 | } | |
7178 | *input_line_pointer = ch; | |
7179 | demand_empty_rest_of_line (); | |
3d3c5039 ILT |
7180 | } |
7181 | ||
9226253a ILT |
7182 | /* Handle the .abicalls pseudo-op. I believe this is equivalent to |
7183 | .option pic2. It means to generate SVR4 PIC calls. */ | |
7184 | ||
7185 | static void | |
7186 | s_abicalls (ignore) | |
7187 | int ignore; | |
7188 | { | |
d9aba805 | 7189 | mips_pic = SVR4_PIC; |
1dc1e798 KR |
7190 | if (USE_GLOBAL_POINTER_OPT) |
7191 | { | |
7192 | if (g_switch_seen && g_switch_value != 0) | |
7193 | as_warn ("-G may not be used with SVR4 PIC code"); | |
7194 | g_switch_value = 0; | |
7195 | } | |
d9aba805 | 7196 | bfd_set_gp_size (stdoutput, 0); |
9226253a ILT |
7197 | demand_empty_rest_of_line (); |
7198 | } | |
7199 | ||
7200 | /* Handle the .cpload pseudo-op. This is used when generating SVR4 | |
7201 | PIC code. It sets the $gp register for the function based on the | |
7202 | function address, which is in the register named in the argument. | |
7203 | This uses a relocation against _gp_disp, which is handled specially | |
7204 | by the linker. The result is: | |
7205 | lui $gp,%hi(_gp_disp) | |
7206 | addiu $gp,$gp,%lo(_gp_disp) | |
7207 | addu $gp,$gp,.cpload argument | |
0dd2d296 | 7208 | The .cpload argument is normally $25 == $t9. */ |
9226253a ILT |
7209 | |
7210 | static void | |
7211 | s_cpload (ignore) | |
7212 | int ignore; | |
7213 | { | |
7214 | expressionS ex; | |
7215 | int icnt = 0; | |
7216 | ||
d9aba805 ILT |
7217 | /* If we are not generating SVR4 PIC code, .cpload is ignored. */ |
7218 | if (mips_pic != SVR4_PIC) | |
0dd2d296 ILT |
7219 | { |
7220 | s_ignore (0); | |
7221 | return; | |
7222 | } | |
7223 | ||
7224 | /* .cpload should be a in .set noreorder section. */ | |
7225 | if (mips_noreorder == 0) | |
7226 | as_warn (".cpload not in noreorder section"); | |
7227 | ||
9226253a ILT |
7228 | ex.X_op = O_symbol; |
7229 | ex.X_add_symbol = symbol_find_or_make ("_gp_disp"); | |
7230 | ex.X_op_symbol = NULL; | |
7231 | ex.X_add_number = 0; | |
7232 | ||
fb251650 ILT |
7233 | /* In ELF, this symbol is implicitly an STT_OBJECT symbol. */ |
7234 | ex.X_add_symbol->bsym->flags |= BSF_OBJECT; | |
7235 | ||
0dd2d296 ILT |
7236 | macro_build_lui ((char *) NULL, &icnt, &ex, GP); |
7237 | macro_build ((char *) NULL, &icnt, &ex, "addiu", "t,r,j", GP, GP, | |
9226253a ILT |
7238 | (int) BFD_RELOC_LO16); |
7239 | ||
0dd2d296 ILT |
7240 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, "addu", "d,v,t", |
7241 | GP, GP, tc_get_register (0)); | |
9226253a ILT |
7242 | |
7243 | demand_empty_rest_of_line (); | |
7244 | } | |
7245 | ||
7246 | /* Handle the .cprestore pseudo-op. This stores $gp into a given | |
7247 | offset from $sp. The offset is remembered, and after making a PIC | |
7248 | call $gp is restored from that location. */ | |
7249 | ||
7250 | static void | |
7251 | s_cprestore (ignore) | |
7252 | int ignore; | |
7253 | { | |
7254 | expressionS ex; | |
7255 | int icnt = 0; | |
7256 | ||
d9aba805 ILT |
7257 | /* If we are not generating SVR4 PIC code, .cprestore is ignored. */ |
7258 | if (mips_pic != SVR4_PIC) | |
0dd2d296 ILT |
7259 | { |
7260 | s_ignore (0); | |
7261 | return; | |
7262 | } | |
7263 | ||
9226253a ILT |
7264 | mips_cprestore_offset = get_absolute_expression (); |
7265 | ||
7266 | ex.X_op = O_constant; | |
7267 | ex.X_add_symbol = NULL; | |
7268 | ex.X_op_symbol = NULL; | |
7269 | ex.X_add_number = mips_cprestore_offset; | |
7270 | ||
0dd2d296 | 7271 | macro_build ((char *) NULL, &icnt, &ex, |
9226253a ILT |
7272 | mips_isa < 3 ? "sw" : "sd", |
7273 | "t,o(b)", GP, (int) BFD_RELOC_LO16, SP); | |
7274 | ||
7275 | demand_empty_rest_of_line (); | |
7276 | } | |
7277 | ||
0dd2d296 ILT |
7278 | /* Handle the .gpword pseudo-op. This is used when generating PIC |
7279 | code. It generates a 32 bit GP relative reloc. */ | |
7280 | ||
7281 | static void | |
7282 | s_gpword (ignore) | |
7283 | int ignore; | |
7284 | { | |
23dc1ae3 | 7285 | symbolS *label; |
0dd2d296 ILT |
7286 | expressionS ex; |
7287 | char *p; | |
7288 | ||
7289 | /* When not generating PIC code, this is treated as .word. */ | |
7dfa376e | 7290 | if (mips_pic != SVR4_PIC) |
0dd2d296 ILT |
7291 | { |
7292 | s_cons (2); | |
7293 | return; | |
7294 | } | |
7295 | ||
23dc1ae3 | 7296 | label = insn_label; |
0dd2d296 ILT |
7297 | mips_emit_delays (); |
7298 | if (auto_align) | |
23dc1ae3 | 7299 | mips_align (2, 0, label); |
0dd2d296 ILT |
7300 | insn_label = NULL; |
7301 | ||
7302 | expression (&ex); | |
7303 | ||
7304 | if (ex.X_op != O_symbol || ex.X_add_number != 0) | |
7305 | { | |
7306 | as_bad ("Unsupported use of .gpword"); | |
7307 | ignore_rest_of_line (); | |
7308 | } | |
7309 | ||
7310 | p = frag_more (4); | |
7311 | md_number_to_chars (p, (valueT) 0, 4); | |
7312 | fix_new_exp (frag_now, p - frag_now->fr_literal, 4, &ex, 0, | |
7313 | BFD_RELOC_MIPS_GPREL32); | |
7314 | ||
7315 | demand_empty_rest_of_line (); | |
7316 | } | |
7317 | ||
7318 | /* Handle the .cpadd pseudo-op. This is used when dealing with switch | |
7319 | tables in SVR4 PIC code. */ | |
7320 | ||
7321 | static void | |
7322 | s_cpadd (ignore) | |
7323 | int ignore; | |
7324 | { | |
7325 | int icnt = 0; | |
7326 | int reg; | |
7327 | ||
7328 | /* This is ignored when not generating SVR4 PIC code. */ | |
7dfa376e | 7329 | if (mips_pic != SVR4_PIC) |
0dd2d296 ILT |
7330 | { |
7331 | s_ignore (0); | |
7332 | return; | |
7333 | } | |
7334 | ||
7335 | /* Add $gp to the register named as an argument. */ | |
7336 | reg = tc_get_register (0); | |
7337 | macro_build ((char *) NULL, &icnt, (expressionS *) NULL, | |
7338 | mips_isa < 3 ? "addu" : "daddu", | |
7339 | "d,v,t", reg, reg, GP); | |
7340 | ||
7341 | demand_empty_rest_of_line (); | |
7342 | } | |
7343 | ||
9226253a | 7344 | /* Parse a register string into a number. Called from the ECOFF code |
0dd2d296 ILT |
7345 | to parse .frame. The argument is non-zero if this is the frame |
7346 | register, so that we can record it in mips_frame_reg. */ | |
9226253a | 7347 | |
3d3c5039 | 7348 | int |
0dd2d296 ILT |
7349 | tc_get_register (frame) |
7350 | int frame; | |
3d3c5039 ILT |
7351 | { |
7352 | int reg; | |
7353 | ||
7354 | SKIP_WHITESPACE (); | |
7355 | if (*input_line_pointer++ != '$') | |
7356 | { | |
7357 | as_warn ("expected `$'"); | |
0dd2d296 | 7358 | reg = 0; |
3d3c5039 | 7359 | } |
0dd2d296 | 7360 | else if (isdigit ((unsigned char) *input_line_pointer)) |
3d3c5039 ILT |
7361 | { |
7362 | reg = get_absolute_expression (); | |
7363 | if (reg < 0 || reg >= 32) | |
7364 | { | |
7365 | as_warn ("Bad register number"); | |
7366 | reg = 0; | |
7367 | } | |
7368 | } | |
7369 | else | |
7370 | { | |
7371 | if (strncmp (input_line_pointer, "fp", 2) == 0) | |
9226253a | 7372 | reg = FP; |
3d3c5039 | 7373 | else if (strncmp (input_line_pointer, "sp", 2) == 0) |
9226253a | 7374 | reg = SP; |
3d3c5039 | 7375 | else if (strncmp (input_line_pointer, "gp", 2) == 0) |
9226253a | 7376 | reg = GP; |
3d3c5039 | 7377 | else if (strncmp (input_line_pointer, "at", 2) == 0) |
9226253a | 7378 | reg = AT; |
3d3c5039 ILT |
7379 | else |
7380 | { | |
7381 | as_warn ("Unrecognized register name"); | |
0dd2d296 | 7382 | reg = 0; |
3d3c5039 ILT |
7383 | } |
7384 | input_line_pointer += 2; | |
7385 | } | |
0dd2d296 ILT |
7386 | if (frame) |
7387 | mips_frame_reg = reg != 0 ? reg : SP; | |
3d3c5039 ILT |
7388 | return reg; |
7389 | } | |
7390 | ||
0dd2d296 ILT |
7391 | valueT |
7392 | md_section_align (seg, addr) | |
7393 | asection *seg; | |
7394 | valueT addr; | |
7395 | { | |
7396 | int align = bfd_get_section_alignment (stdoutput, seg); | |
7397 | ||
cf32394d ILT |
7398 | #ifdef OBJ_ELF |
7399 | /* We don't need to align ELF sections to the full alignment. | |
7400 | However, Irix 5 may prefer that we align them at least to a 16 | |
7401 | byte boundary. */ | |
7402 | if (align > 16) | |
7403 | align = 16; | |
10a14e36 | 7404 | #endif |
cf32394d ILT |
7405 | |
7406 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
0dd2d296 ILT |
7407 | } |
7408 | ||
d8a1c247 KR |
7409 | /* Utility routine, called from above as well. If called while the |
7410 | input file is still being read, it's only an approximation. (For | |
7411 | example, a symbol may later become defined which appeared to be | |
7412 | undefined earlier.) */ | |
22ba90ce ILT |
7413 | |
7414 | static int | |
7415 | nopic_need_relax (sym) | |
d8a1c247 KR |
7416 | symbolS *sym; |
7417 | { | |
7418 | if (sym == 0) | |
7419 | return 0; | |
7420 | ||
1dc1e798 KR |
7421 | if (USE_GLOBAL_POINTER_OPT) |
7422 | { | |
7423 | const char *symname; | |
7424 | int change; | |
7425 | ||
7426 | /* Find out whether this symbol can be referenced off the GP | |
7427 | register. It can be if it is smaller than the -G size or if | |
7428 | it is in the .sdata or .sbss section. Certain symbols can | |
7429 | not be referenced off the GP, although it appears as though | |
7430 | they can. */ | |
7431 | symname = S_GET_NAME (sym); | |
7432 | if (symname != (const char *) NULL | |
7433 | && (strcmp (symname, "eprol") == 0 | |
7434 | || strcmp (symname, "etext") == 0 | |
7435 | || strcmp (symname, "_gp") == 0 | |
7436 | || strcmp (symname, "edata") == 0 | |
7437 | || strcmp (symname, "_fbss") == 0 | |
7438 | || strcmp (symname, "_fdata") == 0 | |
7439 | || strcmp (symname, "_ftext") == 0 | |
7440 | || strcmp (symname, "end") == 0 | |
7441 | || strcmp (symname, "_gp_disp") == 0)) | |
7442 | change = 1; | |
7443 | else if (! S_IS_DEFINED (sym) | |
c625fc23 JSC |
7444 | && (0 |
7445 | #ifndef NO_ECOFF_DEBUGGING | |
7446 | || (sym->ecoff_extern_size != 0 | |
7447 | && sym->ecoff_extern_size <= g_switch_value) | |
7448 | #endif | |
1dc1e798 KR |
7449 | || (S_GET_VALUE (sym) != 0 |
7450 | && S_GET_VALUE (sym) <= g_switch_value))) | |
7451 | change = 0; | |
7452 | else | |
7453 | { | |
7454 | const char *segname; | |
d8a1c247 | 7455 | |
1dc1e798 KR |
7456 | segname = segment_name (S_GET_SEGMENT (sym)); |
7457 | assert (strcmp (segname, ".lit8") != 0 | |
7458 | && strcmp (segname, ".lit4") != 0); | |
7459 | change = (strcmp (segname, ".sdata") != 0 | |
7460 | && strcmp (segname, ".sbss") != 0); | |
7461 | } | |
7462 | return change; | |
7463 | } | |
7464 | else | |
7465 | /* We are not optimizing for the GP register. */ | |
7466 | return 1; | |
d8a1c247 KR |
7467 | } |
7468 | ||
22ba90ce ILT |
7469 | /* Estimate the size of a frag before relaxing. We are not really |
7470 | relaxing here, and the final size is encoded in the subtype | |
7471 | information. */ | |
7472 | ||
0dd2d296 ILT |
7473 | /*ARGSUSED*/ |
7474 | int | |
7475 | md_estimate_size_before_relax (fragp, segtype) | |
7476 | fragS *fragp; | |
7477 | asection *segtype; | |
7478 | { | |
7479 | int change; | |
7480 | ||
d9aba805 | 7481 | if (mips_pic == NO_PIC) |
0dd2d296 | 7482 | { |
d8a1c247 | 7483 | change = nopic_need_relax (fragp->fr_symbol); |
0dd2d296 | 7484 | } |
d9aba805 | 7485 | else if (mips_pic == SVR4_PIC) |
0dd2d296 ILT |
7486 | { |
7487 | asection *symsec = fragp->fr_symbol->bsym->section; | |
7488 | ||
7489 | /* This must duplicate the test in adjust_reloc_syms. */ | |
7490 | change = (symsec != &bfd_und_section | |
7491 | && symsec != &bfd_abs_section | |
7492 | && ! bfd_is_com_section (symsec)); | |
7493 | } | |
d9aba805 ILT |
7494 | else |
7495 | abort (); | |
0dd2d296 ILT |
7496 | |
7497 | if (change) | |
7498 | { | |
7499 | /* Record the offset to the first reloc in the fr_opcode field. | |
7500 | This lets md_convert_frag and tc_gen_reloc know that the code | |
7501 | must be expanded. */ | |
7502 | fragp->fr_opcode = (fragp->fr_literal | |
7503 | + fragp->fr_fix | |
7504 | - RELAX_OLD (fragp->fr_subtype) | |
7505 | + RELAX_RELOC1 (fragp->fr_subtype)); | |
7506 | /* FIXME: This really needs as_warn_where. */ | |
7507 | if (RELAX_WARN (fragp->fr_subtype)) | |
7508 | as_warn ("AT used after \".set noat\" or macro used after \".set nomacro\""); | |
7509 | } | |
7510 | ||
7511 | if (! change) | |
7512 | return 0; | |
7513 | else | |
7514 | return RELAX_NEW (fragp->fr_subtype) - RELAX_OLD (fragp->fr_subtype); | |
7515 | } | |
7516 | ||
7517 | /* Translate internal representation of relocation info to BFD target | |
7518 | format. */ | |
7519 | ||
7520 | arelent ** | |
3d3c5039 ILT |
7521 | tc_gen_reloc (section, fixp) |
7522 | asection *section; | |
7523 | fixS *fixp; | |
7524 | { | |
0dd2d296 | 7525 | static arelent *retval[4]; |
3d3c5039 | 7526 | arelent *reloc; |
a8aed9dd | 7527 | bfd_reloc_code_real_type code; |
3d3c5039 | 7528 | |
0dd2d296 ILT |
7529 | reloc = retval[0] = (arelent *) xmalloc (sizeof (arelent)); |
7530 | retval[1] = NULL; | |
3d3c5039 ILT |
7531 | |
7532 | reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym; | |
7533 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1c803e52 ILT |
7534 | |
7535 | if (mips_pic == EMBEDDED_PIC | |
7536 | && SWITCH_TABLE (fixp)) | |
7537 | { | |
7538 | /* For a switch table entry we use a special reloc. The addend | |
7539 | is actually the difference between the reloc address and the | |
7540 | subtrahend. */ | |
7541 | reloc->addend = reloc->address - S_GET_VALUE (fixp->fx_subsy); | |
1dc1e798 KR |
7542 | if (OUTPUT_FLAVOR != bfd_target_ecoff_flavour) |
7543 | as_fatal ("Double check fx_r_type in tc-mips.c:tc_gen_reloc"); | |
1c803e52 ILT |
7544 | fixp->fx_r_type = BFD_RELOC_GPREL32; |
7545 | } | |
ecd4ca1c ILT |
7546 | else if (fixp->fx_r_type == BFD_RELOC_PCREL_LO16) |
7547 | { | |
7548 | /* We use a special addend for an internal RELLO reloc. */ | |
7549 | if (fixp->fx_addsy->bsym->flags & BSF_SECTION_SYM) | |
7550 | reloc->addend = reloc->address - S_GET_VALUE (fixp->fx_subsy); | |
7551 | else | |
7552 | reloc->addend = fixp->fx_addnumber + reloc->address; | |
7553 | } | |
7554 | else if (fixp->fx_r_type == BFD_RELOC_PCREL_HI16_S) | |
7555 | { | |
7556 | assert (fixp->fx_next != NULL | |
7557 | && fixp->fx_next->fx_r_type == BFD_RELOC_PCREL_LO16); | |
7558 | /* We use a special addend for an internal RELHI reloc. The | |
7559 | reloc is relative to the RELLO; adjust the addend | |
7560 | accordingly. */ | |
7561 | if (fixp->fx_addsy->bsym->flags & BSF_SECTION_SYM) | |
7562 | reloc->addend = (fixp->fx_next->fx_frag->fr_address | |
7563 | + fixp->fx_next->fx_where | |
7564 | - S_GET_VALUE (fixp->fx_subsy)); | |
7565 | else | |
7566 | reloc->addend = (fixp->fx_addnumber | |
7567 | + fixp->fx_next->fx_frag->fr_address | |
7568 | + fixp->fx_next->fx_where); | |
7569 | } | |
1c803e52 | 7570 | else if (fixp->fx_pcrel == 0) |
3d3c5039 ILT |
7571 | reloc->addend = fixp->fx_addnumber; |
7572 | else | |
5b63f465 | 7573 | { |
1dc1e798 KR |
7574 | if (OUTPUT_FLAVOR != bfd_target_aout_flavour) |
7575 | /* A gruesome hack which is a result of the gruesome gas reloc | |
7576 | handling. */ | |
7577 | reloc->addend = reloc->address; | |
7578 | else | |
7579 | reloc->addend = -reloc->address; | |
5b63f465 | 7580 | } |
0dd2d296 ILT |
7581 | |
7582 | /* If this is a variant frag, we may need to adjust the existing | |
7583 | reloc and generate a new one. */ | |
7584 | if (fixp->fx_frag->fr_opcode != NULL | |
7585 | && (fixp->fx_r_type == BFD_RELOC_MIPS_GPREL | |
7586 | || fixp->fx_r_type == BFD_RELOC_MIPS_GOT16 | |
fb251650 ILT |
7587 | || fixp->fx_r_type == BFD_RELOC_MIPS_CALL16 |
7588 | || fixp->fx_r_type == BFD_RELOC_MIPS_GOT_HI16 | |
7589 | || fixp->fx_r_type == BFD_RELOC_MIPS_GOT_LO16 | |
7590 | || fixp->fx_r_type == BFD_RELOC_MIPS_CALL_HI16 | |
7591 | || fixp->fx_r_type == BFD_RELOC_MIPS_CALL_LO16)) | |
0dd2d296 ILT |
7592 | { |
7593 | arelent *reloc2; | |
7594 | ||
7595 | /* If this is not the last reloc in this frag, then we have two | |
fb251650 ILT |
7596 | GPREL relocs, or a GOT_HI16/GOT_LO16 pair, or a |
7597 | CALL_HI16/CALL_LO16, both of which are being replaced. Let | |
7598 | the second one handle all of them. */ | |
0dd2d296 ILT |
7599 | if (fixp->fx_next != NULL |
7600 | && fixp->fx_frag == fixp->fx_next->fx_frag) | |
7601 | { | |
fb251650 ILT |
7602 | assert ((fixp->fx_r_type == BFD_RELOC_MIPS_GPREL |
7603 | && fixp->fx_next->fx_r_type == BFD_RELOC_MIPS_GPREL) | |
7604 | || (fixp->fx_r_type == BFD_RELOC_MIPS_GOT_HI16 | |
7605 | && (fixp->fx_next->fx_r_type | |
7606 | == BFD_RELOC_MIPS_GOT_LO16)) | |
7607 | || (fixp->fx_r_type == BFD_RELOC_MIPS_CALL_HI16 | |
7608 | && (fixp->fx_next->fx_r_type | |
7609 | == BFD_RELOC_MIPS_CALL_LO16))); | |
0dd2d296 ILT |
7610 | retval[0] = NULL; |
7611 | return retval; | |
7612 | } | |
7613 | ||
7614 | fixp->fx_where = fixp->fx_frag->fr_opcode - fixp->fx_frag->fr_literal; | |
7615 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
7616 | reloc2 = retval[1] = (arelent *) xmalloc (sizeof (arelent)); | |
7617 | retval[2] = NULL; | |
7618 | reloc2->sym_ptr_ptr = &fixp->fx_addsy->bsym; | |
7619 | reloc2->address = (reloc->address | |
7620 | + (RELAX_RELOC2 (fixp->fx_frag->fr_subtype) | |
7621 | - RELAX_RELOC1 (fixp->fx_frag->fr_subtype))); | |
7622 | reloc2->addend = fixp->fx_addnumber; | |
7623 | reloc2->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_LO16); | |
7624 | assert (reloc2->howto != NULL); | |
7625 | ||
7626 | if (RELAX_RELOC3 (fixp->fx_frag->fr_subtype)) | |
7627 | { | |
7628 | arelent *reloc3; | |
7629 | ||
7630 | reloc3 = retval[2] = (arelent *) xmalloc (sizeof (arelent)); | |
7631 | retval[3] = NULL; | |
7632 | *reloc3 = *reloc2; | |
7633 | reloc3->address += 4; | |
7634 | } | |
7635 | ||
d9aba805 | 7636 | if (mips_pic == NO_PIC) |
0dd2d296 ILT |
7637 | { |
7638 | assert (fixp->fx_r_type == BFD_RELOC_MIPS_GPREL); | |
7639 | fixp->fx_r_type = BFD_RELOC_HI16_S; | |
7640 | } | |
d9aba805 | 7641 | else if (mips_pic == SVR4_PIC) |
0dd2d296 | 7642 | { |
fb251650 | 7643 | switch (fixp->fx_r_type) |
0dd2d296 | 7644 | { |
fb251650 ILT |
7645 | default: |
7646 | abort (); | |
7647 | case BFD_RELOC_MIPS_GOT16: | |
7648 | break; | |
7649 | case BFD_RELOC_MIPS_CALL16: | |
7650 | case BFD_RELOC_MIPS_GOT_LO16: | |
7651 | case BFD_RELOC_MIPS_CALL_LO16: | |
0dd2d296 | 7652 | fixp->fx_r_type = BFD_RELOC_MIPS_GOT16; |
fb251650 | 7653 | break; |
0dd2d296 ILT |
7654 | } |
7655 | } | |
d9aba805 ILT |
7656 | else |
7657 | abort (); | |
0dd2d296 ILT |
7658 | } |
7659 | ||
a8aed9dd ILT |
7660 | /* Since DIFF_EXPR_OK is defined in tc-mips.h, it is possible that |
7661 | fixup_segment converted a non-PC relative reloc into a PC | |
7662 | relative reloc. In such a case, we need to convert the reloc | |
7663 | code. */ | |
7664 | code = fixp->fx_r_type; | |
7665 | if (fixp->fx_pcrel) | |
7666 | { | |
7667 | switch (code) | |
7668 | { | |
7669 | case BFD_RELOC_8: | |
7670 | code = BFD_RELOC_8_PCREL; | |
7671 | break; | |
7672 | case BFD_RELOC_16: | |
7673 | code = BFD_RELOC_16_PCREL; | |
7674 | break; | |
7675 | case BFD_RELOC_32: | |
7676 | code = BFD_RELOC_32_PCREL; | |
7677 | break; | |
7678 | case BFD_RELOC_8_PCREL: | |
7679 | case BFD_RELOC_16_PCREL: | |
7680 | case BFD_RELOC_32_PCREL: | |
7681 | case BFD_RELOC_16_PCREL_S2: | |
97aca1bc ILT |
7682 | case BFD_RELOC_PCREL_HI16_S: |
7683 | case BFD_RELOC_PCREL_LO16: | |
a8aed9dd ILT |
7684 | break; |
7685 | default: | |
7686 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
7687 | "Cannot make %s relocation PC relative", | |
7688 | bfd_get_reloc_code_name (code)); | |
7689 | } | |
7690 | } | |
7691 | ||
d9aba805 ILT |
7692 | /* To support a PC relative reloc when generating embedded PIC code |
7693 | for ECOFF, we use a Cygnus extension. We check for that here to | |
7694 | make sure that we don't let such a reloc escape normally. */ | |
1dc1e798 | 7695 | if (OUTPUT_FLAVOR == bfd_target_ecoff_flavour |
a8aed9dd | 7696 | && code == BFD_RELOC_16_PCREL_S2 |
d9aba805 ILT |
7697 | && mips_pic != EMBEDDED_PIC) |
7698 | reloc->howto = NULL; | |
7699 | else | |
a8aed9dd | 7700 | reloc->howto = bfd_reloc_type_lookup (stdoutput, code); |
0dd2d296 | 7701 | |
52aa70b5 JW |
7702 | if (reloc->howto == NULL) |
7703 | { | |
7704 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
a8aed9dd ILT |
7705 | "Can not represent %s relocation in this object file format", |
7706 | bfd_get_reloc_code_name (code)); | |
0dd2d296 | 7707 | retval[0] = NULL; |
52aa70b5 | 7708 | } |
3d3c5039 | 7709 | |
0dd2d296 | 7710 | return retval; |
3d3c5039 ILT |
7711 | } |
7712 | ||
0dd2d296 ILT |
7713 | /* Convert a machine dependent frag. */ |
7714 | ||
7715 | void | |
7716 | md_convert_frag (abfd, asec, fragp) | |
7717 | bfd *abfd; | |
7718 | segT asec; | |
7719 | fragS *fragp; | |
3d3c5039 | 7720 | { |
0dd2d296 ILT |
7721 | int old, new; |
7722 | char *fixptr; | |
3d3c5039 | 7723 | |
0dd2d296 ILT |
7724 | if (fragp->fr_opcode == NULL) |
7725 | return; | |
3d3c5039 | 7726 | |
0dd2d296 ILT |
7727 | old = RELAX_OLD (fragp->fr_subtype); |
7728 | new = RELAX_NEW (fragp->fr_subtype); | |
7729 | fixptr = fragp->fr_literal + fragp->fr_fix; | |
7730 | ||
7731 | if (new > 0) | |
7732 | memcpy (fixptr - old, fixptr, new); | |
7733 | ||
7734 | fragp->fr_fix += new - old; | |
7735 | } | |
becfe05e ILT |
7736 | |
7737 | /* This function is called whenever a label is defined. It is used | |
7738 | when handling branch delays; if a branch has a label, we assume we | |
7739 | can not move it. */ | |
7740 | ||
7741 | void | |
7742 | mips_define_label (sym) | |
7743 | symbolS *sym; | |
7744 | { | |
7745 | insn_label = sym; | |
7746 | } | |
22ba90ce ILT |
7747 | |
7748 | /* Decide whether a label is local. This is called by LOCAL_LABEL. | |
7749 | In order to work with gcc when using mips-tfile, we must keep all | |
7750 | local labels. However, in other cases, we want to discard them, | |
7751 | since they are useless. */ | |
7752 | ||
7753 | int | |
7754 | mips_local_label (name) | |
7755 | const char *name; | |
7756 | { | |
c625fc23 | 7757 | #ifndef NO_ECOFF_DEBUGGING |
22ba90ce ILT |
7758 | if (ECOFF_DEBUGGING |
7759 | && mips_debug != 0 | |
7760 | && ! ecoff_debugging_seen) | |
7761 | { | |
7762 | /* We were called with -g, but we didn't see any debugging | |
7763 | information. That may mean that gcc is smuggling debugging | |
7764 | information through to mips-tfile, in which case we must | |
7765 | generate all local labels. */ | |
7766 | return 0; | |
7767 | } | |
c625fc23 | 7768 | #endif |
22ba90ce ILT |
7769 | |
7770 | /* Here it's OK to discard local labels. */ | |
7771 | ||
3af584b4 | 7772 | return name[0] == '$'; |
22ba90ce | 7773 | } |
3d3c5039 | 7774 | \f |
739708fa | 7775 | #if defined (OBJ_ELF) || defined (OBJ_MAYBE_ELF) |
f2a663d3 | 7776 | |
0dd2d296 | 7777 | /* Some special processing for a MIPS ELF file. */ |
f2a663d3 ILT |
7778 | |
7779 | void | |
7780 | mips_elf_final_processing () | |
7781 | { | |
87178180 ILT |
7782 | /* Write out the register information. */ |
7783 | if (! mips_64) | |
7784 | { | |
7785 | Elf32_RegInfo s; | |
7786 | ||
7787 | s.ri_gprmask = mips_gprmask; | |
7788 | s.ri_cprmask[0] = mips_cprmask[0]; | |
7789 | s.ri_cprmask[1] = mips_cprmask[1]; | |
7790 | s.ri_cprmask[2] = mips_cprmask[2]; | |
7791 | s.ri_cprmask[3] = mips_cprmask[3]; | |
7792 | /* The gp_value field is set by the MIPS ELF backend. */ | |
7793 | ||
7794 | bfd_mips_elf32_swap_reginfo_out (stdoutput, &s, | |
7795 | ((Elf32_External_RegInfo *) | |
7796 | mips_regmask_frag)); | |
7797 | } | |
7798 | else | |
7799 | { | |
7800 | Elf64_Internal_RegInfo s; | |
7801 | ||
7802 | s.ri_gprmask = mips_gprmask; | |
7803 | s.ri_pad = 0; | |
7804 | s.ri_cprmask[0] = mips_cprmask[0]; | |
7805 | s.ri_cprmask[1] = mips_cprmask[1]; | |
7806 | s.ri_cprmask[2] = mips_cprmask[2]; | |
7807 | s.ri_cprmask[3] = mips_cprmask[3]; | |
7808 | /* The gp_value field is set by the MIPS ELF backend. */ | |
7809 | ||
7810 | bfd_mips_elf64_swap_reginfo_out (stdoutput, &s, | |
7811 | ((Elf64_External_RegInfo *) | |
7812 | mips_regmask_frag)); | |
7813 | } | |
0dd2d296 ILT |
7814 | |
7815 | /* Set the MIPS ELF flag bits. FIXME: There should probably be some | |
7816 | sort of BFD interface for this. */ | |
7817 | if (mips_any_noreorder) | |
7818 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_NOREORDER; | |
d9aba805 | 7819 | if (mips_pic != NO_PIC) |
0dd2d296 | 7820 | elf_elfheader (stdoutput)->e_flags |= EF_MIPS_PIC; |
f2a663d3 ILT |
7821 | } |
7822 | ||
739708fa | 7823 | #endif /* OBJ_ELF || OBJ_MAYBE_ELF */ |
f2a663d3 | 7824 | \f |
3d3c5039 ILT |
7825 | /* These functions should really be defined by the object file format, |
7826 | since they are related to debugging information. However, this | |
7827 | code has to work for the a.out format, which does not define them, | |
7828 | so we provide simple versions here. These don't actually generate | |
7829 | any debugging information, but they do simple checking and someday | |
7830 | somebody may make them useful. */ | |
7831 | ||
670a50eb ILT |
7832 | typedef struct loc |
7833 | { | |
7834 | struct loc *loc_next; | |
7835 | unsigned long loc_fileno; | |
7836 | unsigned long loc_lineno; | |
7837 | unsigned long loc_offset; | |
7838 | unsigned short loc_delta; | |
7839 | unsigned short loc_count; | |
3d3c5039 | 7840 | #if 0 |
670a50eb | 7841 | fragS *loc_frag; |
3d3c5039 | 7842 | #endif |
670a50eb ILT |
7843 | } |
7844 | locS; | |
3d3c5039 | 7845 | |
670a50eb ILT |
7846 | typedef struct proc |
7847 | { | |
3d3c5039 ILT |
7848 | struct proc *proc_next; |
7849 | struct symbol *proc_isym; | |
7850 | struct symbol *proc_end; | |
7851 | unsigned long proc_reg_mask; | |
7852 | unsigned long proc_reg_offset; | |
7853 | unsigned long proc_fpreg_mask; | |
7854 | unsigned long proc_fpreg_offset; | |
7855 | unsigned long proc_frameoffset; | |
7856 | unsigned long proc_framereg; | |
7857 | unsigned long proc_pcreg; | |
7858 | locS *proc_iline; | |
7859 | struct file *proc_file; | |
7860 | int proc_index; | |
670a50eb ILT |
7861 | } |
7862 | procS; | |
3d3c5039 | 7863 | |
670a50eb ILT |
7864 | typedef struct file |
7865 | { | |
3d3c5039 ILT |
7866 | struct file *file_next; |
7867 | unsigned long file_fileno; | |
7868 | struct symbol *file_symbol; | |
7869 | struct symbol *file_end; | |
7870 | struct proc *file_proc; | |
7871 | int file_numprocs; | |
670a50eb ILT |
7872 | } |
7873 | fileS; | |
3d3c5039 ILT |
7874 | |
7875 | static struct obstack proc_frags; | |
7876 | static procS *proc_lastP; | |
7877 | static procS *proc_rootP; | |
7878 | static int numprocs; | |
7879 | ||
7880 | static void | |
7881 | md_obj_begin () | |
7882 | { | |
670a50eb | 7883 | obstack_begin (&proc_frags, 0x2000); |
3d3c5039 ILT |
7884 | } |
7885 | ||
7886 | static void | |
7887 | md_obj_end () | |
7888 | { | |
7889 | /* check for premature end, nesting errors, etc */ | |
7890 | if (proc_lastP && proc_lastP->proc_end == NULL) | |
670a50eb | 7891 | as_warn ("missing `.end' at end of assembly"); |
3d3c5039 ILT |
7892 | } |
7893 | ||
3d3c5039 ILT |
7894 | static long |
7895 | get_number () | |
7896 | { | |
670a50eb ILT |
7897 | int negative = 0; |
7898 | long val = 0; | |
3d3c5039 | 7899 | |
670a50eb ILT |
7900 | if (*input_line_pointer == '-') |
7901 | { | |
7902 | ++input_line_pointer; | |
7903 | negative = 1; | |
3d3c5039 | 7904 | } |
670a50eb ILT |
7905 | if (!isdigit (*input_line_pointer)) |
7906 | as_bad ("Expected simple number."); | |
7907 | if (input_line_pointer[0] == '0') | |
7908 | { | |
7909 | if (input_line_pointer[1] == 'x') | |
7910 | { | |
7911 | input_line_pointer += 2; | |
7912 | while (isxdigit (*input_line_pointer)) | |
7913 | { | |
7914 | val <<= 4; | |
3a762a0b | 7915 | val |= hex_value (*input_line_pointer++); |
3d3c5039 | 7916 | } |
670a50eb ILT |
7917 | return negative ? -val : val; |
7918 | } | |
7919 | else | |
7920 | { | |
7921 | ++input_line_pointer; | |
7922 | while (isdigit (*input_line_pointer)) | |
7923 | { | |
7924 | val <<= 3; | |
7925 | val |= *input_line_pointer++ - '0'; | |
3d3c5039 | 7926 | } |
670a50eb | 7927 | return negative ? -val : val; |
3d3c5039 ILT |
7928 | } |
7929 | } | |
670a50eb ILT |
7930 | if (!isdigit (*input_line_pointer)) |
7931 | { | |
7932 | printf (" *input_line_pointer == '%c' 0x%02x\n", | |
7933 | *input_line_pointer, *input_line_pointer); | |
7934 | as_warn ("Invalid number"); | |
7935 | return -1; | |
3d3c5039 | 7936 | } |
670a50eb ILT |
7937 | while (isdigit (*input_line_pointer)) |
7938 | { | |
7939 | val *= 10; | |
7940 | val += *input_line_pointer++ - '0'; | |
3d3c5039 | 7941 | } |
670a50eb | 7942 | return negative ? -val : val; |
3d3c5039 ILT |
7943 | } |
7944 | ||
7945 | /* The .file directive; just like the usual .file directive, but there | |
7946 | is an initial number which is the ECOFF file index. */ | |
7947 | ||
7948 | static void | |
7949 | s_file (x) | |
7950 | int x; | |
7951 | { | |
670a50eb | 7952 | int line; |
3d3c5039 | 7953 | |
670a50eb | 7954 | line = get_number (); |
9a7d824a | 7955 | s_app_file (0); |
3d3c5039 ILT |
7956 | } |
7957 | ||
7958 | ||
7959 | /* The .end directive. */ | |
7960 | ||
7961 | static void | |
7962 | s_mipsend (x) | |
7963 | int x; | |
7964 | { | |
670a50eb ILT |
7965 | symbolS *p; |
7966 | ||
7967 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) | |
7968 | { | |
7969 | p = get_symbol (); | |
7970 | demand_empty_rest_of_line (); | |
7971 | } | |
7972 | else | |
7973 | p = NULL; | |
7974 | if (now_seg != text_section) | |
7975 | as_warn (".end not in text section"); | |
7976 | if (!proc_lastP) | |
7977 | { | |
7978 | as_warn (".end and no .ent seen yet."); | |
7979 | return; | |
3d3c5039 ILT |
7980 | } |
7981 | ||
670a50eb ILT |
7982 | if (p != NULL) |
7983 | { | |
7984 | assert (S_GET_NAME (p)); | |
7985 | if (strcmp (S_GET_NAME (p), S_GET_NAME (proc_lastP->proc_isym))) | |
7986 | as_warn (".end symbol does not match .ent symbol."); | |
3d3c5039 ILT |
7987 | } |
7988 | ||
670a50eb | 7989 | proc_lastP->proc_end = (symbolS *) 1; |
3d3c5039 ILT |
7990 | } |
7991 | ||
7992 | /* The .aent and .ent directives. */ | |
7993 | ||
7994 | static void | |
7995 | s_ent (aent) | |
7996 | int aent; | |
7997 | { | |
670a50eb ILT |
7998 | int number = 0; |
7999 | procS *procP; | |
8000 | symbolS *symbolP; | |
8001 | ||
8002 | symbolP = get_symbol (); | |
8003 | if (*input_line_pointer == ',') | |
8004 | input_line_pointer++; | |
dd3f1f76 | 8005 | SKIP_WHITESPACE (); |
670a50eb ILT |
8006 | if (isdigit (*input_line_pointer) || *input_line_pointer == '-') |
8007 | number = get_number (); | |
8008 | if (now_seg != text_section) | |
8009 | as_warn (".ent or .aent not in text section."); | |
8010 | ||
8011 | if (!aent && proc_lastP && proc_lastP->proc_end == NULL) | |
8012 | as_warn ("missing `.end'"); | |
8013 | ||
8014 | if (!aent) | |
8015 | { | |
8016 | procP = (procS *) obstack_alloc (&proc_frags, sizeof (*procP)); | |
8017 | procP->proc_isym = symbolP; | |
8018 | procP->proc_reg_mask = 0; | |
8019 | procP->proc_reg_offset = 0; | |
8020 | procP->proc_fpreg_mask = 0; | |
8021 | procP->proc_fpreg_offset = 0; | |
8022 | procP->proc_frameoffset = 0; | |
8023 | procP->proc_framereg = 0; | |
8024 | procP->proc_pcreg = 0; | |
8025 | procP->proc_end = NULL; | |
8026 | procP->proc_next = NULL; | |
8027 | if (proc_lastP) | |
8028 | proc_lastP->proc_next = procP; | |
8029 | else | |
8030 | proc_rootP = procP; | |
8031 | proc_lastP = procP; | |
8032 | numprocs++; | |
3d3c5039 | 8033 | } |
670a50eb | 8034 | demand_empty_rest_of_line (); |
3d3c5039 ILT |
8035 | } |
8036 | ||
8037 | /* The .frame directive. */ | |
8038 | ||
88225433 | 8039 | #if 0 |
3d3c5039 ILT |
8040 | static void |
8041 | s_frame (x) | |
670a50eb | 8042 | int x; |
3d3c5039 | 8043 | { |
670a50eb ILT |
8044 | char str[100]; |
8045 | symbolS *symP; | |
8046 | int frame_reg; | |
8047 | int frame_off; | |
8048 | int pcreg; | |
8049 | ||
0dd2d296 | 8050 | frame_reg = tc_get_register (1); |
670a50eb ILT |
8051 | if (*input_line_pointer == ',') |
8052 | input_line_pointer++; | |
5ac34ac3 | 8053 | frame_off = get_absolute_expression (); |
670a50eb ILT |
8054 | if (*input_line_pointer == ',') |
8055 | input_line_pointer++; | |
0dd2d296 | 8056 | pcreg = tc_get_register (0); |
670a50eb ILT |
8057 | |
8058 | /* bob third eye */ | |
8059 | assert (proc_rootP); | |
8060 | proc_rootP->proc_framereg = frame_reg; | |
8061 | proc_rootP->proc_frameoffset = frame_off; | |
8062 | proc_rootP->proc_pcreg = pcreg; | |
8063 | /* bob macho .frame */ | |
8064 | ||
8065 | /* We don't have to write out a frame stab for unoptimized code. */ | |
9226253a | 8066 | if (!(frame_reg == FP && frame_off == 0)) |
670a50eb ILT |
8067 | { |
8068 | if (!proc_lastP) | |
8069 | as_warn ("No .ent for .frame to use."); | |
8070 | (void) sprintf (str, "R%d;%d", frame_reg, frame_off); | |
8071 | symP = symbol_new (str, N_VFP, 0, frag_now); | |
8072 | S_SET_TYPE (symP, N_RMASK); | |
8073 | S_SET_OTHER (symP, 0); | |
8074 | S_SET_DESC (symP, 0); | |
8075 | symP->sy_forward = proc_lastP->proc_isym; | |
8076 | /* bob perhaps I should have used pseudo set */ | |
3d3c5039 | 8077 | } |
670a50eb | 8078 | demand_empty_rest_of_line (); |
3d3c5039 | 8079 | } |
88225433 | 8080 | #endif |
3d3c5039 ILT |
8081 | |
8082 | /* The .fmask and .mask directives. */ | |
8083 | ||
88225433 | 8084 | #if 0 |
3d3c5039 ILT |
8085 | static void |
8086 | s_mask (reg_type) | |
8087 | char reg_type; | |
8088 | { | |
670a50eb ILT |
8089 | char str[100], *strP; |
8090 | symbolS *symP; | |
8091 | int i; | |
8092 | unsigned int mask; | |
8093 | int off; | |
8094 | ||
8095 | mask = get_number (); | |
8096 | if (*input_line_pointer == ',') | |
8097 | input_line_pointer++; | |
8098 | off = get_absolute_expression (); | |
8099 | ||
8100 | /* bob only for coff */ | |
8101 | assert (proc_rootP); | |
8102 | if (reg_type == 'F') | |
8103 | { | |
8104 | proc_rootP->proc_fpreg_mask = mask; | |
8105 | proc_rootP->proc_fpreg_offset = off; | |
3d3c5039 | 8106 | } |
670a50eb ILT |
8107 | else |
8108 | { | |
8109 | proc_rootP->proc_reg_mask = mask; | |
8110 | proc_rootP->proc_reg_offset = off; | |
8111 | } | |
8112 | ||
8113 | /* bob macho .mask + .fmask */ | |
3d3c5039 | 8114 | |
670a50eb ILT |
8115 | /* We don't have to write out a mask stab if no saved regs. */ |
8116 | if (!(mask == 0)) | |
8117 | { | |
8118 | if (!proc_lastP) | |
8119 | as_warn ("No .ent for .mask to use."); | |
8120 | strP = str; | |
8121 | for (i = 0; i < 32; i++) | |
8122 | { | |
8123 | if (mask % 2) | |
8124 | { | |
8125 | sprintf (strP, "%c%d,", reg_type, i); | |
8126 | strP += strlen (strP); | |
8127 | } | |
3d3c5039 | 8128 | mask /= 2; |
670a50eb ILT |
8129 | } |
8130 | sprintf (strP, ";%d,", off); | |
8131 | symP = symbol_new (str, N_RMASK, 0, frag_now); | |
8132 | S_SET_TYPE (symP, N_RMASK); | |
8133 | S_SET_OTHER (symP, 0); | |
8134 | S_SET_DESC (symP, 0); | |
8135 | symP->sy_forward = proc_lastP->proc_isym; | |
8136 | /* bob perhaps I should have used pseudo set */ | |
3d3c5039 | 8137 | } |
3d3c5039 | 8138 | } |
88225433 | 8139 | #endif |
3d3c5039 ILT |
8140 | |
8141 | /* The .loc directive. */ | |
8142 | ||
88225433 | 8143 | #if 0 |
3d3c5039 ILT |
8144 | static void |
8145 | s_loc (x) | |
8146 | int x; | |
8147 | { | |
670a50eb ILT |
8148 | symbolS *symbolP; |
8149 | int lineno; | |
8150 | int addroff; | |
3d3c5039 | 8151 | |
670a50eb | 8152 | assert (now_seg == text_section); |
3d3c5039 | 8153 | |
670a50eb | 8154 | lineno = get_number (); |
87e48495 | 8155 | addroff = frag_now_fix (); |
3d3c5039 | 8156 | |
670a50eb ILT |
8157 | symbolP = symbol_new ("", N_SLINE, addroff, frag_now); |
8158 | S_SET_TYPE (symbolP, N_SLINE); | |
8159 | S_SET_OTHER (symbolP, 0); | |
8160 | S_SET_DESC (symbolP, lineno); | |
8161 | symbolP->sy_segment = now_seg; | |
3d3c5039 | 8162 | } |
88225433 | 8163 | #endif |