Commit | Line | Data |
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252b5132 | 1 | /* tc-a29k.c -- Assemble for the AMD 29000. |
3882b010 | 2 | Copyright 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1998, 2000, 2001 |
252b5132 RH |
3 | Free Software Foundation, Inc. |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to the Free | |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
21 | ||
22 | /* John Gilmore has reorganized this module somewhat, to make it easier | |
23 | to convert it to new machines' assemblers as desired. There was too | |
24 | much bloody rewriting required before. There still probably is. */ | |
25 | ||
252b5132 | 26 | #include "as.h" |
3882b010 | 27 | #include "safe-ctype.h" |
252b5132 RH |
28 | |
29 | #include "opcode/a29k.h" | |
30 | ||
31 | /* Make it easier to clone this machine desc into another one. */ | |
32 | #define machine_opcode a29k_opcode | |
33 | #define machine_opcodes a29k_opcodes | |
34 | #define machine_ip a29k_ip | |
35 | #define machine_it a29k_it | |
36 | ||
37 | #define IMMEDIATE_BIT 0x01000000 /* Turns RB into Immediate */ | |
38 | #define ABSOLUTE_BIT 0x01000000 /* Turns PC-relative to Absolute */ | |
39 | #define CE_BIT 0x00800000 /* Coprocessor enable in LOAD */ | |
40 | #define UI_BIT 0x00000080 /* Unsigned integer in CONVERT */ | |
41 | ||
42 | /* handle of the OPCODE hash table */ | |
43 | static struct hash_control *op_hash = NULL; | |
44 | ||
45 | struct machine_it | |
46 | { | |
47 | char *error; | |
48 | unsigned long opcode; | |
49 | struct nlist *nlistp; | |
50 | expressionS exp; | |
51 | int pcrel; | |
52 | int reloc_offset; /* Offset of reloc within insn */ | |
53 | ||
54 | int reloc; | |
55 | } | |
56 | the_insn; | |
57 | ||
58 | static void machine_ip PARAMS ((char *str)); | |
59 | /* static void print_insn PARAMS ((struct machine_it *insn)); */ | |
60 | #ifndef OBJ_COFF | |
61 | static void s_data1 PARAMS ((void)); | |
62 | static void s_use PARAMS ((int)); | |
63 | #endif | |
64 | ||
65 | const pseudo_typeS | |
66 | md_pseudo_table[] = | |
67 | { | |
68 | {"align", s_align_bytes, 4}, | |
69 | {"block", s_space, 0}, | |
70 | {"cputype", s_ignore, 0}, /* CPU as 29000 or 29050 */ | |
71 | {"reg", s_lsym, 0}, /* Register equate, same as equ */ | |
72 | {"space", s_ignore, 0}, /* Listing control */ | |
73 | {"sect", s_ignore, 0}, /* Creation of coff sections */ | |
74 | #ifndef OBJ_COFF | |
75 | /* We can do this right with coff. */ | |
76 | {"use", s_use, 0}, | |
77 | #endif | |
78 | {"word", cons, 4}, | |
79 | {NULL, 0, 0}, | |
80 | }; | |
81 | ||
82 | #if defined(BFD_HEADERS) | |
83 | #ifdef RELSZ | |
84 | const int md_reloc_size = RELSZ; /* Coff headers */ | |
85 | #else | |
86 | const int md_reloc_size = 12; /* something else headers */ | |
87 | #endif | |
88 | #else | |
89 | const int md_reloc_size = 12; /* Not bfdized*/ | |
90 | #endif | |
91 | ||
92 | /* This array holds the chars that always start a comment. If the | |
93 | pre-processor is disabled, these aren't very useful */ | |
94 | const char comment_chars[] = ";"; | |
95 | ||
96 | /* This array holds the chars that only start a comment at the beginning of | |
97 | a line. If the line seems to have the form '# 123 filename' | |
98 | .line and .file directives will appear in the pre-processed output */ | |
99 | /* Note that input_file.c hand checks for '#' at the beginning of the | |
100 | first line of the input file. This is because the compiler outputs | |
1dab94dd | 101 | #NO_APP at the beginning of its output. */ |
252b5132 RH |
102 | /* Also note that comments like this one will always work */ |
103 | const char line_comment_chars[] = "#"; | |
104 | ||
105 | /* We needed an unused char for line separation to work around the | |
106 | lack of macros, using sed and such. */ | |
107 | const char line_separator_chars[] = "@"; | |
108 | ||
109 | /* Chars that can be used to separate mant from exp in floating point nums */ | |
110 | const char EXP_CHARS[] = "eE"; | |
111 | ||
112 | /* Chars that mean this number is a floating point constant */ | |
113 | /* As in 0f12.456 */ | |
114 | /* or 0d1.2345e12 */ | |
115 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
116 | ||
117 | /* Also be aware that MAXIMUM_NUMBER_OF_CHARS_FOR_FLOAT may have to be | |
118 | changed in read.c. Ideally it shouldn't have to know about it at | |
119 | all, but nothing is ideal around here. */ | |
120 | ||
121 | /* | |
122 | * anull bit - causes the branch delay slot instructions to not be executed | |
123 | */ | |
124 | #define ANNUL (1 << 29) | |
125 | ||
126 | #ifndef OBJ_COFF | |
127 | ||
128 | static void | |
129 | s_use (ignore) | |
130 | int ignore; | |
131 | { | |
132 | if (strncmp (input_line_pointer, ".text", 5) == 0) | |
133 | { | |
134 | input_line_pointer += 5; | |
135 | s_text (0); | |
136 | return; | |
137 | } | |
138 | if (strncmp (input_line_pointer, ".data", 5) == 0) | |
139 | { | |
140 | input_line_pointer += 5; | |
141 | s_data (0); | |
142 | return; | |
143 | } | |
144 | if (strncmp (input_line_pointer, ".data1", 6) == 0) | |
145 | { | |
146 | input_line_pointer += 6; | |
147 | s_data1 (); | |
148 | return; | |
149 | } | |
150 | /* Literals can't go in the text segment because you can't read from | |
1dab94dd | 151 | instruction memory on some 29k's. So, into initialized data. */ |
252b5132 RH |
152 | if (strncmp (input_line_pointer, ".lit", 4) == 0) |
153 | { | |
154 | input_line_pointer += 4; | |
155 | subseg_set (SEG_DATA, 200); | |
156 | demand_empty_rest_of_line (); | |
157 | return; | |
158 | } | |
159 | ||
160 | as_bad (_("Unknown segment type")); | |
161 | demand_empty_rest_of_line (); | |
162 | } | |
163 | ||
164 | static void | |
165 | s_data1 () | |
166 | { | |
167 | subseg_set (SEG_DATA, 1); | |
168 | demand_empty_rest_of_line (); | |
169 | } | |
170 | ||
171 | #endif /* OBJ_COFF */ | |
172 | ||
173 | /* Install symbol definition that maps REGNAME to REGNO. | |
174 | FIXME-SOON: These are not recognized in mixed case. */ | |
175 | ||
176 | static void | |
177 | insert_sreg (regname, regnum) | |
178 | char *regname; | |
179 | int regnum; | |
180 | { | |
181 | /* FIXME-SOON, put something in these syms so they won't be output | |
182 | to the symbol table of the resulting object file. */ | |
183 | ||
184 | /* Must be large enough to hold the names of the special registers. */ | |
185 | char buf[80]; | |
186 | int i; | |
187 | ||
188 | symbol_table_insert (symbol_new (regname, SEG_REGISTER, (valueT) regnum, | |
189 | &zero_address_frag)); | |
190 | for (i = 0; regname[i]; i++) | |
3882b010 | 191 | buf[i] = TOUPPER (regname[i]); |
252b5132 RH |
192 | buf[i] = '\0'; |
193 | ||
194 | symbol_table_insert (symbol_new (buf, SEG_REGISTER, (valueT) regnum, | |
195 | &zero_address_frag)); | |
196 | } | |
197 | ||
198 | /* Install symbol definitions for assorted special registers. | |
199 | See ASM29K Ref page 2-9. */ | |
200 | ||
201 | void | |
202 | define_some_regs () | |
203 | { | |
204 | #define SREG 256 | |
205 | ||
206 | /* Protected special-purpose register names */ | |
207 | insert_sreg ("vab", SREG + 0); | |
208 | insert_sreg ("ops", SREG + 1); | |
209 | insert_sreg ("cps", SREG + 2); | |
210 | insert_sreg ("cfg", SREG + 3); | |
211 | insert_sreg ("cha", SREG + 4); | |
212 | insert_sreg ("chd", SREG + 5); | |
213 | insert_sreg ("chc", SREG + 6); | |
214 | insert_sreg ("rbp", SREG + 7); | |
215 | insert_sreg ("tmc", SREG + 8); | |
216 | insert_sreg ("tmr", SREG + 9); | |
217 | insert_sreg ("pc0", SREG + 10); | |
218 | insert_sreg ("pc1", SREG + 11); | |
219 | insert_sreg ("pc2", SREG + 12); | |
220 | insert_sreg ("mmu", SREG + 13); | |
221 | insert_sreg ("lru", SREG + 14); | |
222 | ||
223 | /* Additional protected special-purpose registers for the 29050 */ | |
224 | insert_sreg ("rsn", SREG + 15); | |
225 | insert_sreg ("rma0", SREG + 16); | |
226 | insert_sreg ("rmc0", SREG + 17); | |
227 | insert_sreg ("rma1", SREG + 18); | |
228 | insert_sreg ("rmc1", SREG + 19); | |
229 | insert_sreg ("spc0", SREG + 20); | |
230 | insert_sreg ("spc1", SREG + 21); | |
231 | insert_sreg ("spc2", SREG + 22); | |
232 | insert_sreg ("iba0", SREG + 23); | |
233 | insert_sreg ("ibc0", SREG + 24); | |
234 | insert_sreg ("iba1", SREG + 25); | |
235 | insert_sreg ("ibc1", SREG + 26); | |
236 | ||
237 | /* Additional registers for the 29040. */ | |
238 | insert_sreg ("dba", SREG + 27); | |
239 | insert_sreg ("dbc", SREG + 28); | |
240 | insert_sreg ("cir", SREG + 29); | |
241 | insert_sreg ("cdr", SREG + 30); | |
242 | ||
243 | /* Unprotected special-purpose register names */ | |
244 | insert_sreg ("ipc", SREG + 128); | |
245 | insert_sreg ("ipa", SREG + 129); | |
246 | insert_sreg ("ipb", SREG + 130); | |
247 | insert_sreg ("q", SREG + 131); | |
248 | insert_sreg ("alu", SREG + 132); | |
249 | insert_sreg ("bp", SREG + 133); | |
250 | insert_sreg ("fc", SREG + 134); | |
251 | insert_sreg ("cr", SREG + 135); | |
252 | insert_sreg ("fpe", SREG + 160); | |
253 | insert_sreg ("inte", SREG + 161); | |
254 | insert_sreg ("fps", SREG + 162); | |
255 | /* "", SREG+163); Reserved */ | |
256 | insert_sreg ("exop", SREG + 164); | |
257 | } | |
258 | ||
259 | /* This function is called once, at assembler startup time. It should | |
260 | set up all the tables, etc., that the MD part of the assembler will | |
261 | need. */ | |
262 | void | |
263 | md_begin () | |
264 | { | |
265 | register const char *retval = NULL; | |
266 | int lose = 0; | |
267 | register int skipnext = 0; | |
268 | register unsigned int i; | |
269 | register char *strend, *strend2; | |
270 | ||
271 | /* Hash up all the opcodes for fast use later. */ | |
272 | ||
273 | op_hash = hash_new (); | |
274 | ||
275 | for (i = 0; i < num_opcodes; i++) | |
276 | { | |
277 | const char *name = machine_opcodes[i].name; | |
278 | ||
279 | if (skipnext) | |
280 | { | |
281 | skipnext = 0; | |
282 | continue; | |
283 | } | |
284 | ||
285 | /* Hack to avoid multiple opcode entries. We pre-locate all the | |
1dab94dd | 286 | variations (b/i field and P/A field) and handle them. */ |
252b5132 RH |
287 | |
288 | if (!strcmp (name, machine_opcodes[i + 1].name)) | |
289 | { | |
290 | if ((machine_opcodes[i].opcode & 0x01000000) != 0 | |
291 | || (machine_opcodes[i + 1].opcode & 0x01000000) == 0 | |
292 | || ((machine_opcodes[i].opcode | 0x01000000) | |
293 | != machine_opcodes[i + 1].opcode)) | |
294 | goto bad_table; | |
295 | strend = machine_opcodes[i].args + strlen (machine_opcodes[i].args) - 1; | |
296 | strend2 = machine_opcodes[i + 1].args + strlen (machine_opcodes[i + 1].args) - 1; | |
297 | switch (*strend) | |
298 | { | |
299 | case 'b': | |
300 | if (*strend2 != 'i') | |
301 | goto bad_table; | |
302 | break; | |
303 | case 'P': | |
304 | if (*strend2 != 'A') | |
305 | goto bad_table; | |
306 | break; | |
307 | default: | |
308 | bad_table: | |
309 | fprintf (stderr, "internal error: can't handle opcode %s\n", | |
310 | name); | |
311 | lose = 1; | |
312 | } | |
313 | ||
314 | /* OK, this is an i/b or A/P pair. We skip the | |
315 | higher-valued one, and let the code for operand checking | |
316 | handle OR-ing in the bit. */ | |
317 | skipnext = 1; | |
318 | } | |
319 | ||
320 | retval = hash_insert (op_hash, name, (PTR) &machine_opcodes[i]); | |
321 | if (retval != NULL) | |
322 | { | |
323 | fprintf (stderr, "internal error: can't hash `%s': %s\n", | |
324 | machine_opcodes[i].name, retval); | |
325 | lose = 1; | |
326 | } | |
327 | } | |
328 | ||
329 | if (lose) | |
330 | as_fatal (_("Broken assembler. No assembly attempted.")); | |
331 | ||
332 | define_some_regs (); | |
333 | } | |
334 | ||
335 | /* Assemble a single instruction. Its label has already been handled | |
336 | by the generic front end. We just parse opcode and operands, and | |
337 | produce the bytes of data and relocation. */ | |
338 | ||
339 | void | |
340 | md_assemble (str) | |
341 | char *str; | |
342 | { | |
343 | char *toP; | |
344 | ||
345 | know (str); | |
346 | machine_ip (str); | |
347 | toP = frag_more (4); | |
348 | /* put out the opcode */ | |
349 | md_number_to_chars (toP, the_insn.opcode, 4); | |
350 | ||
351 | /* put out the symbol-dependent stuff */ | |
352 | if (the_insn.reloc != NO_RELOC) | |
353 | { | |
354 | fix_new_exp (frag_now, | |
355 | (toP - frag_now->fr_literal + the_insn.reloc_offset), | |
356 | 4, /* size */ | |
357 | &the_insn.exp, | |
358 | the_insn.pcrel, | |
359 | the_insn.reloc); | |
360 | } | |
361 | } | |
362 | ||
363 | char * | |
364 | parse_operand (s, operandp, opt) | |
365 | char *s; | |
366 | expressionS *operandp; | |
367 | int opt; | |
368 | { | |
369 | char *save = input_line_pointer; | |
370 | char *new; | |
371 | ||
372 | input_line_pointer = s; | |
373 | expression (operandp); | |
374 | if (operandp->X_op == O_absent && ! opt) | |
375 | as_bad (_("missing operand")); | |
376 | new = input_line_pointer; | |
377 | input_line_pointer = save; | |
378 | return new; | |
379 | } | |
380 | ||
381 | /* Instruction parsing. Takes a string containing the opcode. | |
382 | Operands are at input_line_pointer. Output is in the_insn. | |
383 | Warnings or errors are generated. */ | |
384 | ||
385 | static void | |
386 | machine_ip (str) | |
387 | char *str; | |
388 | { | |
389 | char *s; | |
390 | const char *args; | |
391 | struct machine_opcode *insn; | |
392 | char *argsStart; | |
393 | unsigned long opcode; | |
394 | expressionS the_operand; | |
395 | expressionS *operand = &the_operand; | |
396 | unsigned int reg; | |
397 | ||
398 | /* Must handle `div0' opcode. */ | |
399 | s = str; | |
3882b010 L |
400 | if (ISALPHA (*s)) |
401 | for (; ISALNUM (*s); ++s) | |
402 | *s = TOLOWER (*s); | |
252b5132 RH |
403 | |
404 | switch (*s) | |
405 | { | |
406 | case '\0': | |
407 | break; | |
408 | ||
409 | case ' ': /* FIXME-SOMEDAY more whitespace */ | |
410 | *s++ = '\0'; | |
411 | break; | |
412 | ||
413 | default: | |
414 | as_bad (_("Unknown opcode: `%s'"), str); | |
415 | return; | |
416 | } | |
417 | if ((insn = (struct machine_opcode *) hash_find (op_hash, str)) == NULL) | |
418 | { | |
419 | as_bad (_("Unknown opcode `%s'."), str); | |
420 | return; | |
421 | } | |
422 | argsStart = s; | |
423 | opcode = insn->opcode; | |
424 | memset (&the_insn, '\0', sizeof (the_insn)); | |
425 | the_insn.reloc = NO_RELOC; | |
426 | ||
427 | /* Build the opcode, checking as we go to make sure that the | |
428 | operands match. | |
1dab94dd | 429 | |
252b5132 RH |
430 | If an operand matches, we modify the_insn or opcode appropriately, |
431 | and do a "continue". If an operand fails to match, we "break". */ | |
432 | ||
433 | if (insn->args[0] != '\0') | |
434 | { | |
435 | /* Prime the pump. */ | |
436 | s = parse_operand (s, operand, insn->args[0] == 'I'); | |
437 | } | |
438 | ||
439 | for (args = insn->args;; ++args) | |
440 | { | |
441 | switch (*args) | |
442 | { | |
443 | ||
444 | case '\0': /* end of args */ | |
445 | if (*s == '\0') | |
446 | { | |
1dab94dd | 447 | /* We are truly done. */ |
252b5132 RH |
448 | the_insn.opcode = opcode; |
449 | return; | |
450 | } | |
451 | as_bad (_("Too many operands: %s"), s); | |
452 | break; | |
453 | ||
454 | case ',': /* Must match a comma */ | |
455 | if (*s++ == ',') | |
456 | { | |
457 | /* Parse next operand. */ | |
458 | s = parse_operand (s, operand, args[1] == 'I'); | |
459 | continue; | |
460 | } | |
461 | break; | |
462 | ||
463 | case 'v': /* Trap numbers (immediate field) */ | |
464 | if (operand->X_op == O_constant) | |
465 | { | |
466 | if (operand->X_add_number < 256) | |
467 | { | |
468 | opcode |= (operand->X_add_number << 16); | |
469 | continue; | |
470 | } | |
471 | else | |
472 | { | |
473 | as_bad (_("Immediate value of %ld is too large"), | |
474 | (long) operand->X_add_number); | |
475 | continue; | |
476 | } | |
477 | } | |
478 | the_insn.reloc = RELOC_8; | |
479 | the_insn.reloc_offset = 1; /* BIG-ENDIAN Byte 1 of insn */ | |
480 | the_insn.exp = *operand; | |
481 | continue; | |
482 | ||
483 | case 'b': /* A general register or 8-bit immediate */ | |
484 | case 'i': | |
485 | /* We treat the two cases identically since we mashed | |
486 | them together in the opcode table. */ | |
487 | if (operand->X_op == O_register) | |
488 | goto general_reg; | |
489 | ||
490 | /* Make sure the 'i' case really exists. */ | |
491 | if ((insn->opcode | IMMEDIATE_BIT) != (insn + 1)->opcode) | |
492 | break; | |
493 | ||
494 | opcode |= IMMEDIATE_BIT; | |
495 | if (operand->X_op == O_constant) | |
496 | { | |
497 | if (operand->X_add_number < 256) | |
498 | { | |
499 | opcode |= operand->X_add_number; | |
500 | continue; | |
501 | } | |
502 | else | |
503 | { | |
504 | as_bad (_("Immediate value of %ld is too large"), | |
505 | (long) operand->X_add_number); | |
506 | continue; | |
507 | } | |
508 | } | |
509 | the_insn.reloc = RELOC_8; | |
510 | the_insn.reloc_offset = 3; /* BIG-ENDIAN Byte 3 of insn */ | |
511 | the_insn.exp = *operand; | |
512 | continue; | |
513 | ||
514 | case 'a': /* next operand must be a register */ | |
515 | case 'c': | |
516 | general_reg: | |
517 | /* lrNNN or grNNN or %%expr or a user-def register name */ | |
518 | if (operand->X_op != O_register) | |
519 | break; /* Only registers */ | |
520 | know (operand->X_add_symbol == 0); | |
521 | know (operand->X_op_symbol == 0); | |
522 | reg = operand->X_add_number; | |
523 | if (reg >= SREG) | |
524 | break; /* No special registers */ | |
525 | ||
526 | /* Got the register, now figure out where it goes in the | |
527 | opcode. */ | |
528 | switch (*args) | |
529 | { | |
530 | case 'a': | |
531 | opcode |= reg << 8; | |
532 | continue; | |
533 | ||
534 | case 'b': | |
535 | case 'i': | |
536 | opcode |= reg; | |
537 | continue; | |
538 | ||
539 | case 'c': | |
540 | opcode |= reg << 16; | |
541 | continue; | |
542 | } | |
543 | as_fatal (_("failed sanity check.")); | |
544 | break; | |
545 | ||
546 | case 'x': /* 16 bit constant, zero-extended */ | |
547 | case 'X': /* 16 bit constant, one-extended */ | |
548 | if (operand->X_op == O_constant) | |
549 | { | |
550 | opcode |= (operand->X_add_number & 0xFF) << 0 | | |
551 | ((operand->X_add_number & 0xFF00) << 8); | |
552 | continue; | |
553 | } | |
554 | the_insn.reloc = RELOC_CONST; | |
555 | the_insn.exp = *operand; | |
556 | continue; | |
557 | ||
558 | case 'h': | |
559 | if (operand->X_op == O_constant) | |
560 | { | |
561 | opcode |= (operand->X_add_number & 0x00FF0000) >> 16 | | |
562 | (((unsigned long) operand->X_add_number | |
563 | /* avoid sign ext */ & 0xFF000000) >> 8); | |
564 | continue; | |
565 | } | |
566 | the_insn.reloc = RELOC_CONSTH; | |
567 | the_insn.exp = *operand; | |
568 | continue; | |
569 | ||
570 | case 'P': /* PC-relative jump address */ | |
571 | case 'A': /* Absolute jump address */ | |
572 | /* These two are treated together since we folded the | |
573 | opcode table entries together. */ | |
574 | if (operand->X_op == O_constant) | |
575 | { | |
576 | /* Make sure the 'A' case really exists. */ | |
577 | if ((insn->opcode | ABSOLUTE_BIT) != (insn + 1)->opcode) | |
578 | break; | |
579 | { | |
580 | bfd_vma v, mask; | |
581 | mask = 0x1ffff; | |
582 | v = operand->X_add_number & ~ mask; | |
583 | if (v) | |
584 | as_bad ("call/jmp target out of range"); | |
585 | } | |
586 | opcode |= ABSOLUTE_BIT | | |
587 | (operand->X_add_number & 0x0003FC00) << 6 | | |
588 | ((operand->X_add_number & 0x000003FC) >> 2); | |
589 | continue; | |
590 | } | |
591 | the_insn.reloc = RELOC_JUMPTARG; | |
592 | the_insn.exp = *operand; | |
593 | the_insn.pcrel = 1; /* Assume PC-relative jump */ | |
594 | /* FIXME-SOON, Do we figure out whether abs later, after | |
595 | know sym val? */ | |
596 | continue; | |
597 | ||
598 | case 'e': /* Coprocessor enable bit for LOAD/STORE insn */ | |
599 | if (operand->X_op == O_constant) | |
600 | { | |
601 | if (operand->X_add_number == 0) | |
602 | continue; | |
603 | if (operand->X_add_number == 1) | |
604 | { | |
605 | opcode |= CE_BIT; | |
606 | continue; | |
607 | } | |
608 | } | |
609 | break; | |
610 | ||
611 | case 'n': /* Control bits for LOAD/STORE instructions */ | |
612 | if (operand->X_op == O_constant && | |
613 | operand->X_add_number < 128) | |
614 | { | |
615 | opcode |= (operand->X_add_number << 16); | |
616 | continue; | |
617 | } | |
618 | break; | |
619 | ||
620 | case 's': /* Special register number */ | |
621 | if (operand->X_op != O_register) | |
622 | break; /* Only registers */ | |
623 | if (operand->X_add_number < SREG) | |
624 | break; /* Not a special register */ | |
625 | opcode |= (operand->X_add_number & 0xFF) << 8; | |
626 | continue; | |
627 | ||
628 | case 'u': /* UI bit of CONVERT */ | |
629 | if (operand->X_op == O_constant) | |
630 | { | |
631 | if (operand->X_add_number == 0) | |
632 | continue; | |
633 | if (operand->X_add_number == 1) | |
634 | { | |
635 | opcode |= UI_BIT; | |
636 | continue; | |
637 | } | |
638 | } | |
639 | break; | |
640 | ||
641 | case 'r': /* RND bits of CONVERT */ | |
642 | if (operand->X_op == O_constant && | |
643 | operand->X_add_number < 8) | |
644 | { | |
645 | opcode |= operand->X_add_number << 4; | |
646 | continue; | |
647 | } | |
648 | break; | |
649 | ||
650 | case 'I': /* ID bits of INV and IRETINV. */ | |
651 | /* This operand is optional. */ | |
652 | if (operand->X_op == O_absent) | |
653 | continue; | |
654 | else if (operand->X_op == O_constant | |
655 | && operand->X_add_number < 4) | |
656 | { | |
657 | opcode |= operand->X_add_number << 16; | |
658 | continue; | |
659 | } | |
660 | break; | |
661 | ||
662 | case 'd': /* FD bits of CONVERT */ | |
663 | if (operand->X_op == O_constant && | |
664 | operand->X_add_number < 4) | |
665 | { | |
666 | opcode |= operand->X_add_number << 2; | |
667 | continue; | |
668 | } | |
669 | break; | |
670 | ||
252b5132 RH |
671 | case 'f': /* FS bits of CONVERT */ |
672 | if (operand->X_op == O_constant && | |
673 | operand->X_add_number < 4) | |
674 | { | |
675 | opcode |= operand->X_add_number << 0; | |
676 | continue; | |
677 | } | |
678 | break; | |
679 | ||
680 | case 'C': | |
681 | if (operand->X_op == O_constant && | |
682 | operand->X_add_number < 4) | |
683 | { | |
684 | opcode |= operand->X_add_number << 16; | |
685 | continue; | |
686 | } | |
687 | break; | |
688 | ||
689 | case 'F': | |
690 | if (operand->X_op == O_constant && | |
691 | operand->X_add_number < 16) | |
692 | { | |
693 | opcode |= operand->X_add_number << 18; | |
694 | continue; | |
695 | } | |
696 | break; | |
697 | ||
698 | default: | |
699 | BAD_CASE (*args); | |
700 | } | |
701 | /* Types or values of args don't match. */ | |
702 | as_bad ("Invalid operands"); | |
703 | return; | |
704 | } | |
705 | } | |
706 | ||
707 | /* This is identical to the md_atof in m68k.c. I think this is right, | |
708 | but I'm not sure. | |
709 | ||
710 | Turn a string in input_line_pointer into a floating point constant | |
bc0d738a NC |
711 | of type TYPE, and store the appropriate bytes in *LITP. The number |
712 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
252b5132 RH |
713 | returned, or NULL on OK. */ |
714 | ||
715 | /* Equal to MAX_PRECISION in atof-ieee.c */ | |
716 | #define MAX_LITTLENUMS 6 | |
717 | ||
718 | char * | |
719 | md_atof (type, litP, sizeP) | |
720 | char type; | |
721 | char *litP; | |
722 | int *sizeP; | |
723 | { | |
724 | int prec; | |
725 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
726 | LITTLENUM_TYPE *wordP; | |
727 | char *t; | |
728 | ||
729 | switch (type) | |
730 | { | |
731 | ||
732 | case 'f': | |
733 | case 'F': | |
734 | case 's': | |
735 | case 'S': | |
736 | prec = 2; | |
737 | break; | |
738 | ||
739 | case 'd': | |
740 | case 'D': | |
741 | case 'r': | |
742 | case 'R': | |
743 | prec = 4; | |
744 | break; | |
745 | ||
746 | case 'x': | |
747 | case 'X': | |
748 | prec = 6; | |
749 | break; | |
750 | ||
751 | case 'p': | |
752 | case 'P': | |
753 | prec = 6; | |
754 | break; | |
755 | ||
756 | default: | |
757 | *sizeP = 0; | |
758 | return "Bad call to MD_ATOF()"; | |
759 | } | |
760 | t = atof_ieee (input_line_pointer, type, words); | |
761 | if (t) | |
762 | input_line_pointer = t; | |
763 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
764 | for (wordP = words; prec--;) | |
765 | { | |
766 | md_number_to_chars (litP, (valueT) (*wordP++), sizeof (LITTLENUM_TYPE)); | |
767 | litP += sizeof (LITTLENUM_TYPE); | |
768 | } | |
769 | return 0; | |
770 | } | |
771 | ||
772 | /* | |
773 | * Write out big-endian. | |
774 | */ | |
775 | void | |
776 | md_number_to_chars (buf, val, n) | |
777 | char *buf; | |
778 | valueT val; | |
779 | int n; | |
780 | { | |
781 | number_to_chars_bigendian (buf, val, n); | |
782 | } | |
783 | ||
784 | void | |
94f592af | 785 | md_apply_fix3 (fixP, valP, seg) |
252b5132 | 786 | fixS *fixP; |
94f592af NC |
787 | valueT * valP; |
788 | segT seg ATTRIBUTE_UNUSED; | |
252b5132 | 789 | { |
94f592af | 790 | long val = * (long *) valP; |
252b5132 RH |
791 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; |
792 | ||
94f592af | 793 | fixP->fx_addnumber = val; /* Remember value for emit_reloc. */ |
252b5132 | 794 | |
252b5132 RH |
795 | know (fixP->fx_size == 4); |
796 | know (fixP->fx_r_type < NO_RELOC); | |
797 | ||
798 | /* This is a hack. There should be a better way to handle this. */ | |
799 | if (fixP->fx_r_type == RELOC_WDISP30 && fixP->fx_addsy) | |
94f592af | 800 | val += fixP->fx_where + fixP->fx_frag->fr_address; |
252b5132 RH |
801 | |
802 | switch (fixP->fx_r_type) | |
803 | { | |
252b5132 RH |
804 | case RELOC_32: |
805 | buf[0] = val >> 24; | |
806 | buf[1] = val >> 16; | |
807 | buf[2] = val >> 8; | |
808 | buf[3] = val; | |
809 | break; | |
810 | ||
811 | case RELOC_8: | |
812 | buf[0] = val; | |
813 | break; | |
814 | ||
815 | case RELOC_WDISP30: | |
816 | val = (val >>= 2) + 1; | |
817 | buf[0] |= (val >> 24) & 0x3f; | |
818 | buf[1] = (val >> 16); | |
819 | buf[2] = val >> 8; | |
820 | buf[3] = val; | |
821 | break; | |
822 | ||
823 | case RELOC_HI22: | |
824 | buf[1] |= (val >> 26) & 0x3f; | |
825 | buf[2] = val >> 18; | |
826 | buf[3] = val >> 10; | |
827 | break; | |
828 | ||
829 | case RELOC_LO10: | |
830 | buf[2] |= (val >> 8) & 0x03; | |
831 | buf[3] = val; | |
832 | break; | |
833 | ||
834 | case RELOC_BASE13: | |
835 | buf[2] |= (val >> 8) & 0x1f; | |
836 | buf[3] = val; | |
837 | break; | |
838 | ||
839 | case RELOC_WDISP22: | |
840 | val = (val >>= 2) + 1; | |
841 | /* FALLTHROUGH */ | |
842 | case RELOC_BASE22: | |
843 | buf[1] |= (val >> 16) & 0x3f; | |
844 | buf[2] = val >> 8; | |
845 | buf[3] = val; | |
846 | break; | |
847 | ||
848 | case RELOC_JUMPTARG: /* 00XX00XX pattern in a word */ | |
849 | if (!fixP->fx_done) | |
850 | { | |
851 | /* The linker tries to support both AMD and old GNU style | |
852 | R_IREL relocs. That means that if the addend is exactly | |
853 | the negative of the address within the section, the | |
854 | linker will not handle it correctly. */ | |
855 | if (fixP->fx_pcrel | |
856 | && val != 0 | |
857 | && val == - (fixP->fx_frag->fr_address + fixP->fx_where)) | |
858 | as_bad_where | |
859 | (fixP->fx_file, fixP->fx_line, | |
860 | "the linker will not handle this relocation correctly"); | |
861 | } | |
862 | else if (fixP->fx_pcrel) | |
863 | { | |
864 | long v = val >> 17; | |
94f592af | 865 | |
252b5132 RH |
866 | if (v != 0 && v != -1) |
867 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
868 | "call/jmp target out of range"); | |
869 | } | |
870 | else | |
94f592af | 871 | /* This case was supposed to be handled in machine_ip. */ |
252b5132 RH |
872 | abort (); |
873 | buf[1] = val >> 10; /* Holds bits 0003FFFC of address */ | |
874 | buf[3] = val >> 2; | |
875 | break; | |
876 | ||
877 | case RELOC_CONST: /* 00XX00XX pattern in a word */ | |
878 | buf[1] = val >> 8; /* Holds bits 0000XXXX */ | |
879 | buf[3] = val; | |
880 | break; | |
881 | ||
882 | case RELOC_CONSTH: /* 00XX00XX pattern in a word */ | |
883 | buf[1] = val >> 24; /* Holds bits XXXX0000 */ | |
884 | buf[3] = val >> 16; | |
885 | break; | |
886 | ||
887 | case NO_RELOC: | |
888 | default: | |
889 | as_bad (_("bad relocation type: 0x%02x"), fixP->fx_r_type); | |
890 | break; | |
891 | } | |
94f592af NC |
892 | |
893 | if (fixP->fx_addsy == NULL && fixP->fx_pcrel == 0) | |
894 | fixP->fx_done = 1; | |
252b5132 RH |
895 | } |
896 | ||
897 | #ifdef OBJ_COFF | |
898 | short | |
899 | tc_coff_fix2rtype (fixP) | |
900 | fixS *fixP; | |
901 | { | |
902 | ||
903 | switch (fixP->fx_r_type) | |
904 | { | |
905 | case RELOC_32: | |
906 | return (R_WORD); | |
907 | case RELOC_8: | |
908 | return (R_BYTE); | |
909 | case RELOC_CONST: | |
910 | return (R_ILOHALF); | |
911 | case RELOC_CONSTH: | |
912 | return (R_IHIHALF); | |
913 | case RELOC_JUMPTARG: | |
914 | return (R_IREL); | |
915 | default: | |
916 | printf (_("need %o3\n"), fixP->fx_r_type); | |
917 | abort (); | |
918 | } /* switch on type */ | |
919 | ||
920 | return (0); | |
921 | } | |
922 | ||
923 | #endif /* OBJ_COFF */ | |
924 | ||
925 | /* should never be called for 29k */ | |
926 | void | |
927 | md_convert_frag (headers, seg, fragP) | |
928 | object_headers *headers; | |
929 | segT seg; | |
930 | register fragS *fragP; | |
931 | { | |
932 | as_fatal (_("a29k_convert_frag\n")); | |
933 | } | |
934 | ||
935 | /* should never be called for a29k */ | |
936 | int | |
937 | md_estimate_size_before_relax (fragP, segtype) | |
938 | register fragS *fragP; | |
939 | segT segtype; | |
940 | { | |
941 | as_fatal (_("a29k_estimate_size_before_relax\n")); | |
942 | return 0; | |
943 | } | |
944 | ||
945 | #if 0 | |
946 | /* for debugging only */ | |
947 | static void | |
948 | print_insn (insn) | |
949 | struct machine_it *insn; | |
950 | { | |
951 | char *Reloc[] = | |
952 | { | |
953 | "RELOC_8", | |
954 | "RELOC_16", | |
955 | "RELOC_32", | |
956 | "RELOC_DISP8", | |
957 | "RELOC_DISP16", | |
958 | "RELOC_DISP32", | |
959 | "RELOC_WDISP30", | |
960 | "RELOC_WDISP22", | |
961 | "RELOC_HI22", | |
962 | "RELOC_22", | |
963 | "RELOC_13", | |
964 | "RELOC_LO10", | |
965 | "RELOC_SFA_BASE", | |
966 | "RELOC_SFA_OFF13", | |
967 | "RELOC_BASE10", | |
968 | "RELOC_BASE13", | |
969 | "RELOC_BASE22", | |
970 | "RELOC_PC10", | |
971 | "RELOC_PC22", | |
972 | "RELOC_JMP_TBL", | |
973 | "RELOC_SEGOFF16", | |
974 | "RELOC_GLOB_DAT", | |
975 | "RELOC_JMP_SLOT", | |
976 | "RELOC_RELATIVE", | |
977 | "NO_RELOC" | |
978 | }; | |
979 | ||
980 | if (insn->error) | |
981 | { | |
982 | fprintf (stderr, "ERROR: %s\n"); | |
983 | } | |
984 | fprintf (stderr, "opcode=0x%08x\n", insn->opcode); | |
985 | fprintf (stderr, "reloc = %s\n", Reloc[insn->reloc]); | |
986 | fprintf (stderr, "exp = {\n"); | |
987 | fprintf (stderr, "\t\tX_add_symbol = %s\n", | |
988 | insn->exp.X_add_symbol ? | |
989 | (S_GET_NAME (insn->exp.X_add_symbol) ? | |
990 | S_GET_NAME (insn->exp.X_add_symbol) : "???") : "0"); | |
991 | fprintf (stderr, "\t\tX_op_symbol = %s\n", | |
992 | insn->exp.X_op_symbol ? | |
993 | (S_GET_NAME (insn->exp.X_op_symbol) ? | |
994 | S_GET_NAME (insn->exp.X_op_symbol) : "???") : "0"); | |
995 | fprintf (stderr, "\t\tX_add_number = %d\n", | |
996 | insn->exp.X_add_number); | |
997 | fprintf (stderr, "}\n"); | |
998 | } | |
999 | ||
1000 | #endif | |
1001 | ||
1002 | /* Translate internal representation of relocation info to target format. | |
1003 | ||
1004 | On sparc/29k: first 4 bytes are normal unsigned long address, next three | |
1005 | bytes are index, most sig. byte first. Byte 7 is broken up with | |
1006 | bit 7 as external, bits 6 & 5 unused, and the lower | |
1dab94dd | 1007 | five bits as relocation type. Next 4 bytes are long addend. */ |
252b5132 RH |
1008 | /* Thanx and a tip of the hat to Michael Bloom, mb@ttidca.tti.com */ |
1009 | ||
1010 | #ifdef OBJ_AOUT | |
1011 | ||
1012 | void | |
1013 | tc_aout_fix_to_chars (where, fixP, segment_address_in_file) | |
1014 | char *where; | |
1015 | fixS *fixP; | |
1016 | relax_addressT segment_address_in_file; | |
1017 | { | |
1018 | long r_symbolnum; | |
1019 | ||
1020 | know (fixP->fx_r_type < NO_RELOC); | |
1021 | know (fixP->fx_addsy != NULL); | |
1022 | ||
1023 | md_number_to_chars (where, | |
1024 | fixP->fx_frag->fr_address + fixP->fx_where - segment_address_in_file, | |
1025 | 4); | |
1026 | ||
1027 | r_symbolnum = (S_IS_DEFINED (fixP->fx_addsy) | |
1028 | ? S_GET_TYPE (fixP->fx_addsy) | |
1029 | : fixP->fx_addsy->sy_number); | |
1030 | ||
1031 | where[4] = (r_symbolnum >> 16) & 0x0ff; | |
1032 | where[5] = (r_symbolnum >> 8) & 0x0ff; | |
1033 | where[6] = r_symbolnum & 0x0ff; | |
1034 | where[7] = (((!S_IS_DEFINED (fixP->fx_addsy)) << 7) & 0x80) | (0 & 0x60) | (fixP->fx_r_type & 0x1F); | |
1035 | /* Also easy */ | |
1036 | md_number_to_chars (&where[8], fixP->fx_addnumber, 4); | |
1037 | } | |
1038 | ||
1039 | #endif /* OBJ_AOUT */ | |
1040 | \f | |
1041 | CONST char *md_shortopts = ""; | |
1042 | struct option md_longopts[] = { | |
1043 | {NULL, no_argument, NULL, 0} | |
1044 | }; | |
bc805888 | 1045 | size_t md_longopts_size = sizeof (md_longopts); |
252b5132 RH |
1046 | |
1047 | int | |
1048 | md_parse_option (c, arg) | |
1049 | int c; | |
1050 | char *arg; | |
1051 | { | |
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | void | |
1056 | md_show_usage (stream) | |
1057 | FILE *stream; | |
1058 | { | |
1059 | } | |
1060 | \f | |
1061 | /* This is called when a line is unrecognized. This is used to handle | |
1062 | definitions of a29k style local labels. */ | |
1063 | ||
1064 | int | |
1065 | a29k_unrecognized_line (c) | |
1066 | int c; | |
1067 | { | |
1068 | int lab; | |
1069 | char *s; | |
1070 | ||
1071 | if (c != '$' | |
3882b010 | 1072 | || ! ISDIGIT (input_line_pointer[0])) |
252b5132 RH |
1073 | return 0; |
1074 | ||
1075 | s = input_line_pointer; | |
1076 | ||
1077 | lab = 0; | |
3882b010 | 1078 | while (ISDIGIT (*s)) |
252b5132 RH |
1079 | { |
1080 | lab = lab * 10 + *s - '0'; | |
1081 | ++s; | |
1082 | } | |
1083 | ||
1084 | if (*s != ':') | |
1085 | { | |
1086 | /* Not a label definition. */ | |
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | if (dollar_label_defined (lab)) | |
1091 | { | |
1092 | as_bad (_("label \"$%d\" redefined"), lab); | |
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | define_dollar_label (lab); | |
1097 | colon (dollar_label_name (lab, 0)); | |
1098 | input_line_pointer = s + 1; | |
1099 | ||
1100 | return 1; | |
1101 | } | |
1102 | ||
1103 | /* Default the values of symbols known that should be "predefined". We | |
1104 | don't bother to predefine them unless you actually use one, since there | |
1105 | are a lot of them. */ | |
1106 | ||
1107 | symbolS * | |
1108 | md_undefined_symbol (name) | |
1109 | char *name; | |
1110 | { | |
1111 | long regnum; | |
1112 | char testbuf[5 + /*SLOP*/ 5]; | |
1113 | ||
1114 | if (name[0] == 'g' || name[0] == 'G' | |
1115 | || name[0] == 'l' || name[0] == 'L' | |
1116 | || name[0] == 's' || name[0] == 'S') | |
1117 | { | |
1118 | /* Perhaps a global or local register name */ | |
1119 | if (name[1] == 'r' || name[1] == 'R') | |
1120 | { | |
1121 | long maxreg; | |
1122 | ||
1123 | /* Parse the number, make sure it has no extra zeroes or | |
1dab94dd | 1124 | trailing chars. */ |
252b5132 RH |
1125 | regnum = atol (&name[2]); |
1126 | ||
1127 | if (name[0] == 's' || name[0] == 'S') | |
1128 | maxreg = 255; | |
1129 | else | |
1130 | maxreg = 127; | |
1131 | if (regnum > maxreg) | |
1132 | return NULL; | |
1133 | ||
1134 | sprintf (testbuf, "%ld", regnum); | |
1135 | if (strcmp (testbuf, &name[2]) != 0) | |
1136 | return NULL; /* gr007 or lr7foo or whatever */ | |
1137 | ||
1138 | /* We have a wiener! Define and return a new symbol for it. */ | |
1139 | if (name[0] == 'l' || name[0] == 'L') | |
1140 | regnum += 128; | |
1141 | else if (name[0] == 's' || name[0] == 'S') | |
1142 | regnum += SREG; | |
1143 | return (symbol_new (name, SEG_REGISTER, (valueT) regnum, | |
1144 | &zero_address_frag)); | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | return NULL; | |
1149 | } | |
1150 | ||
1151 | /* Parse an operand that is machine-specific. */ | |
1152 | ||
1153 | void | |
1154 | md_operand (expressionP) | |
1155 | expressionS *expressionP; | |
1156 | { | |
1157 | ||
1158 | if (input_line_pointer[0] == '%' && input_line_pointer[1] == '%') | |
1159 | { | |
1160 | /* We have a numeric register expression. No biggy. */ | |
1161 | input_line_pointer += 2; /* Skip %% */ | |
1162 | (void) expression (expressionP); | |
1163 | if (expressionP->X_op != O_constant | |
1164 | || expressionP->X_add_number > 255) | |
1165 | as_bad (_("Invalid expression after %%%%\n")); | |
1166 | expressionP->X_op = O_register; | |
1167 | } | |
1168 | else if (input_line_pointer[0] == '&') | |
1169 | { | |
1170 | /* We are taking the 'address' of a register...this one is not | |
1171 | in the manual, but it *is* in traps/fpsymbol.h! What they | |
1172 | seem to want is the register number, as an absolute number. */ | |
1173 | input_line_pointer++; /* Skip & */ | |
1174 | (void) expression (expressionP); | |
1175 | if (expressionP->X_op != O_register) | |
1176 | as_bad (_("Invalid register in & expression")); | |
1177 | else | |
1178 | expressionP->X_op = O_constant; | |
1179 | } | |
1180 | else if (input_line_pointer[0] == '$' | |
3882b010 | 1181 | && ISDIGIT (input_line_pointer[1])) |
252b5132 RH |
1182 | { |
1183 | long lab; | |
1184 | char *name; | |
1185 | symbolS *sym; | |
1186 | ||
1187 | /* This is a local label. */ | |
1188 | ++input_line_pointer; | |
1189 | lab = (long) get_absolute_expression (); | |
1190 | if (dollar_label_defined (lab)) | |
1191 | { | |
1192 | name = dollar_label_name (lab, 0); | |
1193 | sym = symbol_find (name); | |
1194 | } | |
1195 | else | |
1196 | { | |
1197 | name = dollar_label_name (lab, 1); | |
1198 | sym = symbol_find_or_make (name); | |
1199 | } | |
1200 | ||
1201 | expressionP->X_op = O_symbol; | |
1202 | expressionP->X_add_symbol = sym; | |
1203 | expressionP->X_add_number = 0; | |
1204 | } | |
1205 | else if (input_line_pointer[0] == '$') | |
1206 | { | |
1207 | char *s; | |
1208 | char type; | |
1209 | int fieldnum, fieldlimit; | |
1210 | LITTLENUM_TYPE floatbuf[8]; | |
1211 | ||
1212 | /* $float(), $doubleN(), or $extendN() convert floating values | |
1213 | to integers. */ | |
1214 | ||
1215 | s = input_line_pointer; | |
1216 | ||
1217 | ++s; | |
1218 | ||
1219 | fieldnum = 0; | |
1220 | if (strncmp (s, "double", sizeof "double" - 1) == 0) | |
1221 | { | |
1222 | s += sizeof "double" - 1; | |
1223 | type = 'd'; | |
1224 | fieldlimit = 2; | |
1225 | } | |
1226 | else if (strncmp (s, "float", sizeof "float" - 1) == 0) | |
1227 | { | |
1228 | s += sizeof "float" - 1; | |
1229 | type = 'f'; | |
1230 | fieldlimit = 1; | |
1231 | } | |
1232 | else if (strncmp (s, "extend", sizeof "extend" - 1) == 0) | |
1233 | { | |
1234 | s += sizeof "extend" - 1; | |
1235 | type = 'x'; | |
1236 | fieldlimit = 4; | |
1237 | } | |
1dab94dd | 1238 | else |
252b5132 RH |
1239 | { |
1240 | return; | |
1241 | } | |
1242 | ||
3882b010 | 1243 | if (ISDIGIT (*s)) |
252b5132 RH |
1244 | { |
1245 | fieldnum = *s - '0'; | |
1246 | ++s; | |
1247 | } | |
1248 | if (fieldnum >= fieldlimit) | |
1249 | return; | |
1250 | ||
1251 | SKIP_WHITESPACE (); | |
1252 | if (*s != '(') | |
1253 | return; | |
1254 | ++s; | |
1255 | SKIP_WHITESPACE (); | |
1256 | ||
1257 | s = atof_ieee (s, type, floatbuf); | |
1258 | if (s == NULL) | |
1259 | return; | |
1260 | s = s; | |
1261 | ||
1262 | SKIP_WHITESPACE (); | |
1263 | if (*s != ')') | |
1264 | return; | |
1265 | ++s; | |
1266 | SKIP_WHITESPACE (); | |
1267 | ||
1268 | input_line_pointer = s; | |
1dab94dd | 1269 | expressionP->X_op = O_constant; |
252b5132 RH |
1270 | expressionP->X_unsigned = 1; |
1271 | expressionP->X_add_number = ((floatbuf[fieldnum * 2] | |
1272 | << LITTLENUM_NUMBER_OF_BITS) | |
1273 | + floatbuf[fieldnum * 2 + 1]); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | /* Round up a section size to the appropriate boundary. */ | |
1278 | valueT | |
1279 | md_section_align (segment, size) | |
1280 | segT segment; | |
1281 | valueT size; | |
1282 | { | |
1283 | return size; /* Byte alignment is fine */ | |
1284 | } | |
1285 | ||
1286 | /* Exactly what point is a PC-relative offset relative TO? | |
1287 | On the 29000, they're relative to the address of the instruction, | |
1288 | which we have set up as the address of the fixup too. */ | |
1289 | long | |
1290 | md_pcrel_from (fixP) | |
1291 | fixS *fixP; | |
1292 | { | |
1293 | return fixP->fx_where + fixP->fx_frag->fr_address; | |
1294 | } |