Commit | Line | Data |
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7499d566 NC |
1 | /* tc-maxq.c -- assembler code for a MAXQ chip. |
2 | ||
5a49b8ac | 3 | Copyright 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
7499d566 NC |
4 | |
5 | Contributed by HCL Technologies Pvt. Ltd. | |
6 | ||
7 | Author: Vineet Sharma(vineets@noida.hcltech.com) Inderpreet | |
8 | S.(inderpreetb@noida.hcltech.com) | |
9 | ||
10 | This file is part of GAS. | |
11 | ||
12 | GAS is free software; you can redistribute it and/or modify it under the | |
13 | terms of the GNU General Public License as published by the Free Software | |
ec2655a6 | 14 | Foundation; either version 3, or (at your option) any later version. |
7499d566 NC |
15 | |
16 | GAS is distributed in the hope that it will be useful, but WITHOUT ANY | |
17 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
18 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more | |
19 | details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License along | |
22 | with GAS; see the file COPYING. If not, write to the Free Software | |
4b4da160 | 23 | Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
7499d566 NC |
24 | |
25 | #include "as.h" | |
26 | #include "safe-ctype.h" | |
27 | #include "subsegs.h" | |
28 | #include "dwarf2dbg.h" | |
29 | #include "tc-maxq.h" | |
30 | #include "opcode/maxq.h" | |
31 | #include "ctype.h" | |
32 | ||
33 | #ifndef MAXQ10S | |
34 | #define MAXQ10S 1 | |
35 | #endif | |
36 | ||
7499d566 NC |
37 | #ifndef DEFAULT_ARCH |
38 | #define DEFAULT_ARCH "MAXQ20" | |
39 | #endif | |
40 | ||
41 | #ifndef MAX_OPERANDS | |
42 | #define MAX_OPERANDS 2 | |
43 | #endif | |
44 | ||
45 | #ifndef MAX_MNEM_SIZE | |
46 | #define MAX_MNEM_SIZE 8 | |
47 | #endif | |
48 | ||
49 | #ifndef END_OF_INSN | |
50 | #define END_OF_INSN '\0' | |
51 | #endif | |
52 | ||
53 | #ifndef IMMEDIATE_PREFIX | |
54 | #define IMMEDIATE_PREFIX '#' | |
55 | #endif | |
56 | ||
57 | #ifndef MAX_REG_NAME_SIZE | |
58 | #define MAX_REG_NAME_SIZE 4 | |
59 | #endif | |
60 | ||
61 | #ifndef MAX_MEM_NAME_SIZE | |
62 | #define MAX_MEM_NAME_SIZE 9 | |
63 | #endif | |
64 | ||
65 | /* opcode for PFX[0]. */ | |
66 | #define PFX0 0x0b | |
67 | ||
68 | /* Set default to MAXQ20. */ | |
5c4504f7 | 69 | unsigned int max_version = bfd_mach_maxq20; |
7499d566 NC |
70 | |
71 | const char *default_arch = DEFAULT_ARCH; | |
72 | ||
73 | /* Type of the operand: Register,Immediate,Memory access,flag or bit. */ | |
74 | ||
75 | union _maxq20_op | |
76 | { | |
77 | const reg_entry * reg; | |
78 | char imms; /* This is to store the immediate value operand. */ | |
79 | expressionS * disps; | |
80 | symbolS * data; | |
81 | const mem_access * mem; | |
82 | int flag; | |
83 | const reg_bit * r_bit; | |
84 | }; | |
85 | ||
86 | typedef union _maxq20_op maxq20_opcode; | |
87 | ||
88 | /* For handling optional L/S in Maxq20. */ | |
7499d566 NC |
89 | |
90 | /* Exposed For Linker - maps indirectly to the liker relocations. */ | |
91 | #define LONG_PREFIX MAXQ_LONGJUMP /* BFD_RELOC_16 */ | |
92 | #define SHORT_PREFIX MAXQ_SHORTJUMP /* BFD_RELOC_16_PCREL_S2 */ | |
93 | #define ABSOLUTE_ADDR_FOR_DATA MAXQ_INTERSEGMENT | |
94 | ||
95 | #define NO_PREFIX 0 | |
96 | #define EXPLICT_LONG_PREFIX 14 | |
97 | ||
7499d566 NC |
98 | /* The main instruction structure containing fields to describe instrn */ |
99 | typedef struct _maxq20_insn | |
100 | { | |
101 | /* The opcode information for the MAXQ20 */ | |
102 | MAXQ20_OPCODE_INFO op; | |
103 | ||
104 | /* The number of operands */ | |
105 | unsigned int operands; | |
106 | ||
107 | /* Number of different types of operands - Comments can be removed if reqd. | |
108 | */ | |
109 | unsigned int reg_operands, mem_operands, disp_operands, data_operands; | |
110 | unsigned int imm_operands, imm_bit_operands, bit_operands, flag_operands; | |
111 | ||
112 | /* Types of the individual operands */ | |
113 | UNKNOWN_OP types[MAX_OPERANDS]; | |
114 | ||
115 | /* Relocation type for operand : to be investigated into */ | |
116 | int reloc[MAX_OPERANDS]; | |
117 | ||
118 | /* Complete information of the Operands */ | |
119 | maxq20_opcode maxq20_op[MAX_OPERANDS]; | |
120 | ||
121 | /* Choice of prefix register whenever needed */ | |
122 | int prefix; | |
123 | ||
124 | /* Optional Prefix for Instructions like LJUMP, SJUMP etc */ | |
125 | unsigned char Instr_Prefix; | |
126 | ||
127 | /* 16 bit Instruction word */ | |
128 | unsigned char instr[2]; | |
129 | } | |
130 | maxq20_insn; | |
131 | ||
132 | /* Definitions of all possible characters that can start an operand. */ | |
133 | const char *extra_symbol_chars = "@(#"; | |
134 | ||
135 | /* Special Character that would start a comment. */ | |
136 | const char comment_chars[] = ";"; | |
137 | ||
138 | /* Starts a comment when it appears at the start of a line. */ | |
139 | const char line_comment_chars[] = ";#"; | |
140 | ||
141 | const char line_separator_chars[] = ""; /* originally may b by sudeep "\n". */ | |
142 | ||
143 | /* The following are used for option processing. */ | |
144 | ||
145 | /* This is added to the mach independent string passed to getopt. */ | |
146 | const char *md_shortopts = "q"; | |
147 | ||
148 | /* Characters for exponent and floating point. */ | |
149 | const char EXP_CHARS[] = "eE"; | |
150 | const char FLT_CHARS[] = ""; | |
151 | ||
152 | /* This is for the machine dependent option handling. */ | |
153 | #define OPTION_EB (OPTION_MD_BASE + 0) | |
154 | #define OPTION_EL (OPTION_MD_BASE + 1) | |
155 | #define MAXQ_10 (OPTION_MD_BASE + 2) | |
156 | #define MAXQ_20 (OPTION_MD_BASE + 3) | |
157 | ||
158 | struct option md_longopts[] = | |
159 | { | |
160 | {"MAXQ10", no_argument, NULL, MAXQ_10}, | |
161 | {"MAXQ20", no_argument, NULL, MAXQ_20}, | |
162 | {NULL, no_argument, NULL, 0} | |
163 | }; | |
164 | size_t md_longopts_size = sizeof (md_longopts); | |
165 | ||
166 | /* md_undefined_symbol We have no need for this function. */ | |
167 | ||
168 | symbolS * | |
169 | md_undefined_symbol (char * name ATTRIBUTE_UNUSED) | |
170 | { | |
171 | return NULL; | |
172 | } | |
173 | ||
5c4504f7 NC |
174 | static void |
175 | maxq_target (int target) | |
176 | { | |
177 | max_version = target; | |
178 | bfd_set_arch_mach (stdoutput, bfd_arch_maxq, max_version); | |
179 | } | |
180 | ||
7499d566 NC |
181 | int |
182 | md_parse_option (int c, char *arg ATTRIBUTE_UNUSED) | |
183 | { | |
184 | /* Any options support will be added onto this switch case. */ | |
185 | switch (c) | |
186 | { | |
187 | case MAXQ_10: | |
5c4504f7 | 188 | max_version = bfd_mach_maxq10; |
7499d566 NC |
189 | break; |
190 | case MAXQ_20: | |
5c4504f7 | 191 | max_version = bfd_mach_maxq20; |
7499d566 NC |
192 | break; |
193 | ||
194 | default: | |
195 | return 0; | |
196 | } | |
197 | ||
198 | return 1; | |
199 | } | |
200 | ||
201 | /* When a usage message is printed, this function is called and | |
202 | it prints a description of the machine specific options. */ | |
203 | ||
204 | void | |
205 | md_show_usage (FILE * stream) | |
206 | { | |
207 | /* Over here we will fill the description of the machine specific options. */ | |
208 | ||
209 | fprintf (stream, _(" MAXQ-specific assembler options:\n")); | |
210 | ||
211 | fprintf (stream, _("\ | |
212 | -MAXQ20 generate obj for MAXQ20(default)\n\ | |
213 | -MAXQ10 generate obj for MAXQ10\n\ | |
214 | ")); | |
215 | } | |
216 | ||
7499d566 NC |
217 | unsigned long |
218 | maxq20_mach (void) | |
219 | { | |
220 | if (!(strcmp (default_arch, "MAXQ20"))) | |
221 | return 0; | |
222 | ||
223 | as_fatal (_("Unknown architecture")); | |
224 | return 1; | |
225 | } | |
226 | ||
227 | arelent * | |
228 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS *fixp) | |
229 | { | |
230 | arelent *rel; | |
231 | bfd_reloc_code_real_type code; | |
232 | ||
233 | switch (fixp->fx_r_type) | |
234 | { | |
235 | case MAXQ_INTERSEGMENT: | |
236 | case MAXQ_LONGJUMP: | |
237 | case BFD_RELOC_16_PCREL_S2: | |
238 | code = fixp->fx_r_type; | |
239 | break; | |
240 | ||
241 | case 0: | |
242 | default: | |
243 | switch (fixp->fx_size) | |
244 | { | |
245 | default: | |
246 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
247 | _("can not do %d byte relocation"), fixp->fx_size); | |
248 | code = BFD_RELOC_32; | |
249 | break; | |
250 | ||
251 | case 1: | |
252 | code = BFD_RELOC_8; | |
253 | break; | |
254 | case 2: | |
255 | code = BFD_RELOC_16; | |
256 | break; | |
257 | case 4: | |
258 | code = BFD_RELOC_32; | |
259 | break; | |
260 | } | |
261 | } | |
262 | ||
263 | rel = xmalloc (sizeof (arelent)); | |
264 | rel->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
265 | *rel->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
266 | ||
267 | rel->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
268 | rel->addend = fixp->fx_addnumber; | |
269 | rel->howto = bfd_reloc_type_lookup (stdoutput, code); | |
270 | ||
271 | if (rel->howto == NULL) | |
272 | { | |
273 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
274 | _("cannot represent relocation type %s"), | |
275 | bfd_get_reloc_code_name (code)); | |
276 | ||
277 | /* Set howto to a garbage value so that we can keep going. */ | |
278 | rel->howto = bfd_reloc_type_lookup (stdoutput, BFD_RELOC_32); | |
9c2799c2 | 279 | gas_assert (rel->howto != NULL); |
7499d566 NC |
280 | } |
281 | ||
282 | return rel; | |
283 | } | |
284 | ||
7499d566 NC |
285 | /* md_estimate_size_before_relax() |
286 | ||
287 | Called just before relax() for rs_machine_dependent frags. The MAXQ | |
288 | assembler uses these frags to handle 16 bit absolute jumps which require a | |
289 | prefix instruction to be inserted. Any symbol that is now undefined will | |
290 | not become defined. Return the correct fr_subtype in the frag. Return the | |
291 | initial "guess for variable size of frag"(This will be eiter 2 or 0) to | |
292 | caller. The guess is actually the growth beyond the fixed part. Whatever | |
293 | we do to grow the fixed or variable part contributes to our returned | |
294 | value. */ | |
295 | ||
296 | int | |
297 | md_estimate_size_before_relax (fragS *fragP, segT segment) | |
298 | { | |
299 | /* Check whether the symbol has been resolved or not. | |
300 | Otherwise we will have to generate a fixup. */ | |
301 | if ((S_GET_SEGMENT (fragP->fr_symbol) != segment) | |
302 | || fragP->fr_subtype == EXPLICT_LONG_PREFIX) | |
303 | { | |
304 | RELOC_ENUM reloc_type; | |
305 | unsigned char *opcode; | |
306 | int old_fr_fix; | |
307 | ||
308 | /* Now this symbol has not been defined in this file. | |
309 | Hence we will have to create a fixup. */ | |
310 | int size = 2; | |
311 | ||
312 | /* This is for the prefix instruction. */ | |
313 | ||
314 | if (fragP->fr_subtype == EXPLICT_LONG_PREFIX) | |
315 | fragP->fr_subtype = LONG_PREFIX; | |
316 | ||
317 | if (S_GET_SEGMENT (fragP->fr_symbol) != segment | |
318 | && ((!(fragP->fr_subtype) == EXPLICT_LONG_PREFIX))) | |
319 | fragP->fr_subtype = ABSOLUTE_ADDR_FOR_DATA; | |
320 | ||
321 | reloc_type = | |
322 | (fragP->fr_subtype ? fragP->fr_subtype : ABSOLUTE_ADDR_FOR_DATA); | |
323 | ||
324 | fragP->fr_subtype = reloc_type; | |
325 | ||
326 | if (reloc_type == SHORT_PREFIX) | |
327 | size = 0; | |
328 | old_fr_fix = fragP->fr_fix; | |
329 | opcode = (unsigned char *) fragP->fr_opcode; | |
330 | ||
331 | fragP->fr_fix += (size); | |
332 | ||
333 | fix_new (fragP, old_fr_fix - 2, size + 2, | |
334 | fragP->fr_symbol, fragP->fr_offset, 0, reloc_type); | |
335 | frag_wane (fragP); | |
336 | return fragP->fr_fix - old_fr_fix; | |
337 | } | |
338 | ||
339 | if (fragP->fr_subtype == SHORT_PREFIX) | |
340 | { | |
341 | fragP->fr_subtype = SHORT_PREFIX; | |
342 | return 0; | |
343 | } | |
344 | ||
345 | if (fragP->fr_subtype == NO_PREFIX || fragP->fr_subtype == LONG_PREFIX) | |
346 | { | |
347 | unsigned long instr; | |
348 | unsigned long call_addr; | |
349 | long diff; | |
350 | fragS *f; | |
351 | diff = diff ^ diff;; | |
352 | call_addr = call_addr ^ call_addr; | |
353 | instr = 0; | |
354 | f = NULL; | |
355 | ||
356 | /* segment_info_type *seginfo = seg_info (segment); */ | |
357 | instr = fragP->fr_address + fragP->fr_fix - 2; | |
358 | ||
359 | /* This is the offset if it is a PC relative jump. */ | |
360 | call_addr = S_GET_VALUE (fragP->fr_symbol) + fragP->fr_offset; | |
9f5083a4 NC |
361 | |
362 | /* PC stores the value of the next instruction. */ | |
363 | diff = (call_addr - instr) - 1; | |
7499d566 NC |
364 | |
365 | if (diff >= (-128 * 2) && diff <= (2 * 127)) | |
366 | { | |
367 | /* Now as offset is an 8 bit value, we will pass | |
368 | that to the jump instruction directly. */ | |
369 | fragP->fr_subtype = NO_PREFIX; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | fragP->fr_subtype = LONG_PREFIX; | |
374 | return 2; | |
375 | } | |
376 | ||
377 | as_fatal (_("Illegal Reloc type in md_estimate_size_before_relax for line : %d"), | |
378 | frag_now->fr_line); | |
379 | return 0; | |
380 | } | |
381 | ||
7499d566 NC |
382 | char * |
383 | md_atof (int type, char * litP, int * sizeP) | |
384 | { | |
499ac353 NC |
385 | if (type == 'd') |
386 | /* The size of Double has been changed to 2 words ie 32 bits. */ | |
387 | type = 'f'; | |
388 | return ieee_md_atof (type, litP, sizeP, FALSE); | |
7499d566 NC |
389 | } |
390 | ||
391 | void | |
392 | maxq20_cons_fix_new (fragS * frag, unsigned int off, unsigned int len, | |
393 | expressionS * exp) | |
394 | { | |
395 | int r = 0; | |
396 | ||
397 | switch (len) | |
398 | { | |
399 | case 2: | |
400 | r = MAXQ_WORDDATA; /* Word+n */ | |
401 | break; | |
402 | case 4: | |
403 | r = MAXQ_LONGDATA; /* Long+n */ | |
404 | break; | |
405 | } | |
406 | ||
407 | fix_new_exp (frag, off, len, exp, 0, r); | |
408 | return; | |
409 | } | |
410 | ||
7499d566 | 411 | /* GAS will call this for every rs_machine_dependent fragment. The |
708587a4 | 412 | instruction is completed using the data from the relaxation pass. It may |
7499d566 | 413 | also create any necessary relocations. */ |
7499d566 NC |
414 | void |
415 | md_convert_frag (bfd * headers ATTRIBUTE_UNUSED, | |
416 | segT seg ATTRIBUTE_UNUSED, | |
417 | fragS * fragP) | |
7499d566 | 418 | { |
2132e3a3 | 419 | char *opcode; |
7499d566 NC |
420 | offsetT target_address; |
421 | offsetT opcode_address; | |
422 | offsetT displacement_from_opcode_start; | |
423 | int address; | |
424 | ||
425 | opcode = fragP->fr_opcode; | |
426 | address = 0; | |
427 | target_address = opcode_address = displacement_from_opcode_start = 0; | |
428 | ||
429 | target_address = | |
430 | (S_GET_VALUE (fragP->fr_symbol) / MAXQ_OCTETS_PER_BYTE) + | |
431 | (fragP->fr_offset / MAXQ_OCTETS_PER_BYTE); | |
432 | ||
433 | opcode_address = | |
434 | (fragP->fr_address / MAXQ_OCTETS_PER_BYTE) + | |
435 | ((fragP->fr_fix - 2) / MAXQ_OCTETS_PER_BYTE); | |
436 | ||
9f5083a4 NC |
437 | /* PC points to the next Instruction. */ |
438 | displacement_from_opcode_start = ((target_address - opcode_address) - 1); | |
7499d566 NC |
439 | |
440 | if ((displacement_from_opcode_start >= -128 | |
441 | && displacement_from_opcode_start <= 127) | |
442 | && (fragP->fr_subtype == SHORT_PREFIX | |
443 | || fragP->fr_subtype == NO_PREFIX)) | |
444 | { | |
445 | /* Its a displacement. */ | |
2132e3a3 | 446 | *opcode = (char) displacement_from_opcode_start; |
7499d566 NC |
447 | } |
448 | else | |
449 | { | |
450 | /* Its an absolute 16 bit jump. Now we have to | |
451 | load the prefix operator with the upper 8 bits. */ | |
452 | if (fragP->fr_subtype == SHORT_PREFIX) | |
453 | { | |
454 | as_bad (_("Cant make long jump/call into short jump/call : %d"), | |
455 | fragP->fr_line); | |
456 | return; | |
457 | } | |
458 | ||
459 | /* Check whether the symbol has been resolved or not. | |
460 | Otherwise we will have to generate a fixup. */ | |
461 | ||
462 | if (fragP->fr_subtype != SHORT_PREFIX) | |
463 | { | |
464 | RELOC_ENUM reloc_type; | |
7499d566 NC |
465 | int old_fr_fix; |
466 | int size = 2; | |
467 | ||
468 | /* Now this is a basolute jump/call. | |
469 | Hence we will have to create a fixup. */ | |
470 | if (fragP->fr_subtype == NO_PREFIX) | |
471 | fragP->fr_subtype = LONG_PREFIX; | |
472 | ||
473 | reloc_type = | |
474 | (fragP->fr_subtype ? fragP->fr_subtype : LONG_PREFIX); | |
475 | ||
476 | if (reloc_type == 1) | |
477 | size = 0; | |
478 | old_fr_fix = fragP->fr_fix; | |
7499d566 NC |
479 | |
480 | fragP->fr_fix += (size); | |
481 | ||
482 | fix_new (fragP, old_fr_fix - 2, size + 2, | |
483 | fragP->fr_symbol, fragP->fr_offset, 0, reloc_type); | |
484 | frag_wane (fragP); | |
485 | } | |
486 | } | |
487 | } | |
488 | ||
489 | long | |
490 | md_pcrel_from (fixS *fixP) | |
491 | { | |
492 | return fixP->fx_size + fixP->fx_where + fixP->fx_frag->fr_address; | |
493 | } | |
494 | ||
495 | /* Writes the val to the buf, where n is the nuumber of bytes to write. */ | |
496 | ||
497 | void | |
498 | maxq_number_to_chars (char *buf, valueT val, int n) | |
499 | { | |
500 | if (target_big_endian) | |
501 | number_to_chars_bigendian (buf, val, n); | |
502 | else | |
503 | number_to_chars_littleendian (buf, val, n); | |
504 | } | |
505 | ||
506 | /* GAS will call this for each fixup. It's main objective is to store the | |
507 | correct value in the object file. 'fixup_segment' performs the generic | |
55cf6793 | 508 | overflow check on the 'valueT *val' argument after md_apply_fix returns. |
7499d566 | 509 | If the overflow check is relevant for the target machine, then |
55cf6793 | 510 | 'md_apply_fix' should modify 'valueT *val', typically to the value stored |
7499d566 NC |
511 | in the object file (not to be done in MAXQ). */ |
512 | ||
513 | void | |
55cf6793 | 514 | md_apply_fix (fixS *fixP, valueT *valT, segT seg ATTRIBUTE_UNUSED) |
7499d566 NC |
515 | { |
516 | char *p = fixP->fx_frag->fr_literal + fixP->fx_where; | |
517 | char *frag_to_fix_at = | |
518 | fixP->fx_frag->fr_literal + fixP->fx_frag->fr_fix - 2; | |
519 | ||
520 | if (fixP) | |
521 | { | |
522 | if (fixP->fx_frag && valT) | |
523 | { | |
524 | /* If the relaxation substate is not defined we make it equal | |
525 | to the kind of relocation the fixup is generated for. */ | |
526 | if (!fixP->fx_frag->fr_subtype) | |
527 | fixP->fx_frag->fr_subtype = fixP->fx_r_type; | |
528 | ||
529 | /* For any instruction in which either we have specified an | |
530 | absolute address or it is a long jump we need to add a PFX0 | |
531 | instruction to it. In this case as the instruction has already | |
532 | being written at 'fx_where' in the frag we copy it at the end of | |
533 | the frag(which is where the relocation was generated) as when | |
534 | the relocation is generated the frag is grown by 2 type, this is | |
535 | where we copy the contents of fx_where and add a pfx0 at | |
536 | fx_where. */ | |
537 | if ((fixP->fx_frag->fr_subtype == ABSOLUTE_ADDR_FOR_DATA) | |
538 | || (fixP->fx_frag->fr_subtype == LONG_PREFIX)) | |
539 | { | |
540 | *(frag_to_fix_at + 1) = *(p + 1); | |
541 | maxq_number_to_chars (p + 1, PFX0, 1); | |
542 | } | |
543 | ||
7499d566 NC |
544 | /* Remember value for tc_gen_reloc. */ |
545 | fixP->fx_addnumber = *valT; | |
7499d566 NC |
546 | } |
547 | ||
7499d566 NC |
548 | /* Some fixups generated by GAS which gets resovled before this this |
549 | func. is called need to be wriiten to the frag as here we are going | |
550 | to go away with the relocations fx_done=1. */ | |
551 | if (fixP->fx_addsy == NULL) | |
552 | { | |
553 | maxq_number_to_chars (p, *valT, fixP->fx_size); | |
554 | fixP->fx_addnumber = *valT; | |
555 | fixP->fx_done = 1; | |
556 | } | |
557 | } | |
558 | } | |
559 | ||
560 | /* Tables for lexical analysis. */ | |
561 | static char mnemonic_chars[256]; | |
562 | static char register_chars[256]; | |
563 | static char operand_chars[256]; | |
564 | static char identifier_chars[256]; | |
565 | static char digit_chars[256]; | |
566 | ||
567 | /* Lexical Macros. */ | |
568 | #define is_mnemonic_char(x) (mnemonic_chars[(unsigned char)(x)]) | |
569 | #define is_register_char(x) (register_chars[(unsigned char)(x)]) | |
570 | #define is_operand_char(x) (operand_chars[(unsigned char)(x)]) | |
571 | #define is_space_char(x) (x==' ') | |
572 | #define is_identifier_char(x) (identifier_chars[(unsigned char)(x)]) | |
573 | #define is_digit_char(x) (identifier_chars[(unsigned char)(x)]) | |
574 | ||
575 | /* Special characters for operands. */ | |
576 | static char operand_special_chars[] = "[]@.-+"; | |
577 | ||
578 | /* md_assemble() will always leave the instruction passed to it unaltered. | |
579 | To do this we store the instruction in a special stack. */ | |
580 | static char save_stack[32]; | |
581 | static char *save_stack_p; | |
582 | ||
583 | #define END_STRING_AND_SAVE(s) \ | |
584 | do \ | |
585 | { \ | |
586 | *save_stack_p++ = *(s); \ | |
587 | *s = '\0'; \ | |
588 | } \ | |
589 | while (0) | |
590 | ||
591 | #define RESTORE_END_STRING(s) \ | |
592 | do \ | |
593 | { \ | |
594 | *(s) = *(--save_stack_p); \ | |
595 | } \ | |
596 | while (0) | |
597 | ||
598 | /* The instruction we are assembling. */ | |
599 | static maxq20_insn i; | |
600 | ||
601 | /* The current template. */ | |
602 | static MAXQ20_OPCODES *current_templates; | |
603 | ||
604 | /* The displacement operand if any. */ | |
605 | static expressionS disp_expressions; | |
606 | ||
607 | /* Current Operand we are working on (0:1st operand,1:2nd operand). */ | |
608 | static int this_operand; | |
609 | ||
610 | /* The prefix instruction if used. */ | |
611 | static char PFX_INSN[2]; | |
612 | static char INSERT_BUFFER[2]; | |
613 | ||
614 | /* For interface with expression() ????? */ | |
615 | extern char *input_line_pointer; | |
616 | ||
617 | /* The HASH Tables: */ | |
618 | ||
619 | /* Operand Hash Table. */ | |
620 | static struct hash_control *op_hash; | |
621 | ||
622 | /* Register Hash Table. */ | |
623 | static struct hash_control *reg_hash; | |
624 | ||
625 | /* Memory reference Hash Table. */ | |
626 | static struct hash_control *mem_hash; | |
627 | ||
628 | /* Bit hash table. */ | |
629 | static struct hash_control *bit_hash; | |
630 | ||
631 | /* Memory Access syntax table. */ | |
632 | static struct hash_control *mem_syntax_hash; | |
633 | ||
634 | /* This is a mapping from pseudo-op names to functions. */ | |
635 | ||
636 | const pseudo_typeS md_pseudo_table[] = | |
637 | { | |
638 | {"int", cons, 2}, /* size of 'int' has been changed to 1 word | |
639 | (i.e) 16 bits. */ | |
5c4504f7 NC |
640 | {"maxq10", maxq_target, bfd_mach_maxq10}, |
641 | {"maxq20", maxq_target, bfd_mach_maxq20}, | |
7499d566 NC |
642 | {NULL, 0, 0}, |
643 | }; | |
644 | ||
7499d566 NC |
645 | #define SET_PFX_ARG(x) (PFX_INSN[1] = x) |
646 | ||
647 | ||
708587a4 | 648 | /* This function sets the PFX value corresponding to the specs. Source |
7499d566 NC |
649 | Destination Index Selection ---------------------------------- Write To| |
650 | SourceRegRange | Dest Addr Range | |
651 | ------------------------------------------------------ PFX[0] | 0h-Fh | | |
652 | 0h-7h PFX[1] | 10h-1Fh | 0h-7h PFX[2] | 0h-Fh | 8h-Fh PFX[3] | 10h-1Fh | | |
653 | 8h-Fh PFX[4] | 0h-Fh | 10h-17h PFX[5] | 10h-1Fh | 10h-17h PFX[6] | 0h-Fh | | |
654 | 18h-1Fh PFX[7] | 0h-Fh | 18h-1Fh */ | |
655 | ||
656 | static void | |
657 | set_prefix (void) | |
658 | { | |
659 | short int src_index = 0, dst_index = 0; | |
660 | ||
661 | if (i.operands == 0) | |
662 | return; | |
663 | if (i.operands == 1) /* Only SRC is Present */ | |
664 | { | |
665 | if (i.types[0] == REG) | |
666 | { | |
667 | if (!strcmp (i.op.name, "POP") || !strcmp (i.op.name, "POPI")) | |
668 | { | |
669 | dst_index = i.maxq20_op[0].reg[0].Mod_index; | |
670 | src_index = 0x00; | |
671 | } | |
672 | else | |
673 | { | |
674 | src_index = i.maxq20_op[0].reg[0].Mod_index; | |
675 | dst_index = 0x00; | |
676 | } | |
677 | } | |
678 | } | |
679 | ||
680 | if (i.operands == 2) | |
681 | { | |
682 | if (i.types[0] == REG && i.types[1] == REG) | |
683 | { | |
684 | dst_index = i.maxq20_op[0].reg[0].Mod_index; | |
685 | src_index = i.maxq20_op[1].reg[0].Mod_index; | |
686 | } | |
687 | else if (i.types[0] != REG && i.types[1] == REG) /* DST is Absent */ | |
688 | { | |
689 | src_index = i.maxq20_op[1].reg[0].Mod_index; | |
690 | dst_index = 0x00; | |
691 | } | |
692 | else if (i.types[0] == REG && i.types[1] != REG) /* Id SRC is Absent */ | |
693 | { | |
694 | dst_index = i.maxq20_op[0].reg[0].Mod_index; | |
695 | src_index = 0x00; | |
696 | } | |
697 | else if (i.types[0] == BIT && i.maxq20_op[0].r_bit) | |
698 | { | |
699 | dst_index = i.maxq20_op[0].r_bit->reg->Mod_index; | |
700 | src_index = 0x00; | |
701 | } | |
702 | ||
703 | else if (i.types[1] == BIT && i.maxq20_op[1].r_bit) | |
704 | { | |
705 | dst_index = 0x00; | |
706 | src_index = i.maxq20_op[1].r_bit->reg->Mod_index; | |
707 | } | |
708 | } | |
709 | ||
710 | if (src_index >= 0x00 && src_index <= 0xF) | |
711 | { | |
712 | if (dst_index >= 0x00 && dst_index <= 0x07) | |
713 | /* Set PFX[0] */ | |
714 | i.prefix = 0; | |
715 | ||
716 | else if (dst_index >= 0x08 && dst_index <= 0x0F) | |
717 | /* Set PFX[2] */ | |
718 | i.prefix = 2; | |
719 | ||
720 | else if (dst_index >= 0x10 && dst_index <= 0x17) | |
721 | /* Set PFX[4] */ | |
722 | i.prefix = 4; | |
723 | ||
724 | else if (dst_index >= 0x18 && dst_index <= 0x1F) | |
725 | /* Set PFX[6] */ | |
726 | i.prefix = 6; | |
727 | } | |
728 | else if (src_index >= 0x10 && src_index <= 0x1F) | |
729 | { | |
730 | if (dst_index >= 0x00 && dst_index <= 0x07) | |
731 | /* Set PFX[1] */ | |
732 | i.prefix = 1; | |
733 | ||
734 | else if (dst_index >= 0x08 && dst_index <= 0x0F) | |
735 | /* Set PFX[3] */ | |
736 | i.prefix = 3; | |
737 | ||
738 | else if (dst_index >= 0x10 && dst_index <= 0x17) | |
739 | /* Set PFX[5] */ | |
740 | i.prefix = 5; | |
741 | ||
742 | else if (dst_index >= 0x18 && dst_index <= 0x1F) | |
743 | /* Set PFX[7] */ | |
744 | i.prefix = 7; | |
745 | } | |
746 | } | |
747 | ||
748 | static unsigned char | |
749 | is_a_LSinstr (const char *ln_pointer) | |
750 | { | |
751 | int i = 0; | |
752 | ||
753 | for (i = 0; LSInstr[i] != NULL; i++) | |
754 | if (!strcmp (LSInstr[i], ln_pointer)) | |
755 | return 1; | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | static void | |
761 | LS_processing (const char *line) | |
762 | { | |
763 | if (is_a_LSinstr (line)) | |
764 | { | |
765 | if ((line[0] == 'L') || (line[0] == 'l')) | |
766 | { | |
767 | i.prefix = 0; | |
768 | INSERT_BUFFER[0] = PFX0; | |
769 | i.Instr_Prefix = LONG_PREFIX; | |
770 | } | |
771 | else if ((line[0] == 'S') || (line[0] == 's')) | |
772 | i.Instr_Prefix = SHORT_PREFIX; | |
773 | else | |
774 | i.Instr_Prefix = NO_PREFIX; | |
775 | } | |
776 | else | |
777 | i.Instr_Prefix = LONG_PREFIX; | |
778 | } | |
779 | ||
780 | /* Separate mnemonics and the operands. */ | |
781 | ||
782 | static char * | |
783 | parse_insn (char *line, char *mnemonic) | |
784 | { | |
785 | char *l = line; | |
786 | char *token_start = l; | |
787 | char *mnem_p; | |
788 | char temp[MAX_MNEM_SIZE]; | |
789 | int ii = 0; | |
790 | ||
791 | memset (temp, END_OF_INSN, MAX_MNEM_SIZE); | |
792 | mnem_p = mnemonic; | |
793 | ||
794 | while ((*mnem_p = mnemonic_chars[(unsigned char) *l]) != 0) | |
795 | { | |
796 | ii++; | |
797 | mnem_p++; | |
798 | if (mnem_p >= mnemonic + MAX_MNEM_SIZE) | |
799 | { | |
800 | as_bad (_("no such instruction: `%s'"), token_start); | |
801 | return NULL; | |
802 | } | |
803 | l++; | |
804 | } | |
805 | ||
806 | if (!is_space_char (*l) && *l != END_OF_INSN) | |
807 | { | |
808 | as_bad (_("invalid character %s in mnemonic"), l); | |
809 | return NULL; | |
810 | } | |
811 | ||
812 | while (ii) | |
813 | { | |
814 | temp[ii - 1] = toupper ((char) mnemonic[ii - 1]); | |
815 | ii--; | |
816 | } | |
817 | ||
818 | LS_processing (temp); | |
819 | ||
820 | if (i.Instr_Prefix != 0 && is_a_LSinstr (temp)) | |
821 | /* Skip the optional L-S. */ | |
822 | memcpy (temp, temp + 1, MAX_MNEM_SIZE); | |
823 | ||
824 | /* Look up instruction (or prefix) via hash table. */ | |
825 | current_templates = (MAXQ20_OPCODES *) hash_find (op_hash, temp); | |
826 | ||
827 | if (current_templates != NULL) | |
828 | return l; | |
829 | ||
830 | as_bad (_("no such instruction: `%s'"), token_start); | |
831 | return NULL; | |
832 | } | |
833 | ||
834 | /* Function to calculate x to the power of y. | |
835 | Just to avoid including the math libraries. */ | |
836 | ||
837 | static int | |
838 | pwr (int x, int y) | |
839 | { | |
840 | int k, ans = 1; | |
841 | ||
842 | for (k = 0; k < y; k++) | |
843 | ans *= x; | |
844 | ||
845 | return ans; | |
846 | } | |
847 | ||
848 | static reg_entry * | |
849 | parse_reg_by_index (char *imm_start) | |
850 | { | |
851 | int k = 0, mid = 0, rid = 0, val = 0, j = 0; | |
852 | char temp[4] = { 0 }; | |
853 | reg_entry *reg = NULL; | |
854 | ||
855 | do | |
856 | { | |
857 | if (isdigit (imm_start[k])) | |
858 | temp[k] = imm_start[k] - '0'; | |
859 | ||
860 | else if (isalpha (imm_start[k]) | |
861 | && (imm_start[k] = tolower (imm_start[k])) < 'g') | |
862 | temp[k] = 10 + (int) (imm_start[k] - 'a'); | |
863 | ||
864 | else if (imm_start[k] == 'h') | |
865 | break; | |
866 | ||
867 | else if (imm_start[k] == END_OF_INSN) | |
868 | { | |
869 | imm_start[k] = 'd'; | |
870 | break; | |
871 | } | |
872 | ||
873 | else | |
874 | return NULL; /* not a hex digit */ | |
875 | ||
876 | k++; | |
877 | } | |
878 | while (imm_start[k] != '\n'); | |
879 | ||
880 | switch (imm_start[k]) | |
881 | { | |
882 | case 'h': | |
883 | for (j = 0; j < k; j++) | |
884 | val += temp[j] * pwr (16, k - j - 1); | |
885 | break; | |
886 | ||
887 | case 'd': | |
888 | for (j = 0; j < k; j++) | |
889 | { | |
890 | if (temp[j] > 9) | |
891 | return NULL; /* not a number */ | |
892 | ||
893 | val += temp[j] * pwr (10, k - j - 1); | |
894 | break; | |
895 | } | |
896 | } | |
897 | ||
898 | /* Get the module and register id's. */ | |
899 | mid = val & 0x0f; | |
900 | rid = (val >> 4) & 0x0f; | |
901 | ||
902 | if (mid < 6) | |
903 | { | |
904 | /* Search the pheripheral reg table. */ | |
905 | for (j = 0; j < num_of_reg; j++) | |
906 | { | |
907 | if (new_reg_table[j].opcode == val) | |
908 | { | |
909 | reg = (reg_entry *) & new_reg_table[j]; | |
910 | break; | |
911 | } | |
912 | } | |
913 | } | |
914 | ||
915 | else | |
916 | { | |
917 | /* Search the system register table. */ | |
918 | j = 0; | |
919 | ||
920 | while (system_reg_table[j].reg_name != NULL) | |
921 | { | |
922 | if (system_reg_table[j].opcode == val) | |
923 | { | |
924 | reg = (reg_entry *) & system_reg_table[j]; | |
925 | break; | |
926 | } | |
927 | j++; | |
928 | } | |
929 | } | |
930 | ||
931 | if (reg == NULL) | |
932 | { | |
933 | as_bad (_("Invalid register value %s"), imm_start); | |
934 | return reg; | |
935 | } | |
936 | ||
937 | #if CHANGE_PFX | |
938 | if (this_operand == 0 && reg != NULL) | |
939 | { | |
940 | if (reg->Mod_index > 7) | |
941 | i.prefix = 2; | |
942 | else | |
943 | i.prefix = 0; | |
944 | } | |
945 | #endif | |
946 | return (reg_entry *) reg; | |
947 | } | |
948 | ||
949 | /* REG_STRING starts *before* REGISTER_PREFIX. */ | |
950 | ||
951 | static reg_entry * | |
952 | parse_register (char *reg_string, char **end_op) | |
953 | { | |
954 | char *s = reg_string; | |
955 | char *p = NULL; | |
956 | char reg_name_given[MAX_REG_NAME_SIZE + 1]; | |
957 | reg_entry *r = NULL; | |
958 | ||
959 | r = NULL; | |
960 | p = NULL; | |
961 | ||
962 | /* Skip possible REGISTER_PREFIX and possible whitespace. */ | |
963 | if (is_space_char (*s)) | |
964 | ++s; | |
965 | ||
966 | p = reg_name_given; | |
967 | while ((*p++ = register_chars[(unsigned char) *s]) != '\0') | |
968 | { | |
969 | if (p >= reg_name_given + MAX_REG_NAME_SIZE) | |
970 | return (reg_entry *) NULL; | |
971 | s++; | |
972 | } | |
973 | ||
974 | *end_op = s; | |
975 | ||
976 | r = (reg_entry *) hash_find (reg_hash, reg_name_given); | |
977 | ||
978 | #if CHANGE_PFX | |
979 | if (this_operand == 0 && r != NULL) | |
980 | { | |
981 | if (r->Mod_index > 7) | |
982 | i.prefix = 2; | |
983 | else | |
984 | i.prefix = 0; | |
985 | } | |
986 | #endif | |
987 | return r; | |
988 | } | |
989 | ||
990 | static reg_bit * | |
991 | parse_register_bit (char *reg_string, char **end_op) | |
992 | { | |
993 | const char *s = reg_string; | |
994 | short k = 0; | |
995 | char diff = 0; | |
996 | reg_bit *rb = NULL; | |
997 | reg_entry *r = NULL; | |
998 | bit_name *b = NULL; | |
999 | char temp_bitname[MAX_REG_NAME_SIZE + 2]; | |
1000 | char temp[MAX_REG_NAME_SIZE + 1]; | |
1001 | ||
1002 | memset (&temp, '\0', (MAX_REG_NAME_SIZE + 1)); | |
1003 | memset (&temp_bitname, '\0', (MAX_REG_NAME_SIZE + 2)); | |
1004 | ||
1005 | diff = 0; | |
1006 | r = NULL; | |
1007 | rb = NULL; | |
1008 | rb = xmalloc (sizeof (reg_bit)); | |
1009 | rb->reg = xmalloc (sizeof (reg_entry)); | |
1010 | k = 0; | |
1011 | ||
1012 | /* For supporting bit names. */ | |
1013 | b = (bit_name *) hash_find (bit_hash, reg_string); | |
1014 | ||
1015 | if (b != NULL) | |
1016 | { | |
1017 | *end_op = reg_string + strlen (reg_string); | |
1018 | strcpy (temp_bitname, b->reg_bit); | |
1019 | s = temp_bitname; | |
1020 | } | |
1021 | ||
1022 | if (strchr (s, '.')) | |
1023 | { | |
1024 | while (*s != '.') | |
1025 | { | |
1026 | if (*s == '\0') | |
1027 | return NULL; | |
1028 | temp[k] = *s++; | |
1029 | ||
1030 | k++; | |
1031 | } | |
1032 | temp[k] = '\0'; | |
1033 | } | |
1034 | ||
1035 | if ((r = parse_register (temp, end_op)) == NULL) | |
1036 | return NULL; | |
1037 | ||
1038 | rb->reg = r; | |
1039 | ||
1040 | /* Skip the "." */ | |
1041 | s++; | |
1042 | ||
1043 | if (isdigit ((char) *s)) | |
1044 | rb->bit = atoi (s); | |
1045 | else if (isalpha ((char) *s)) | |
1046 | { | |
1047 | rb->bit = (char) *s - 'a'; | |
1048 | rb->bit += 10; | |
1049 | if (rb->bit > 15) | |
1050 | { | |
1051 | as_bad (_("Invalid bit number : '%c'"), (char) *s); | |
1052 | return NULL; | |
1053 | } | |
1054 | } | |
1055 | ||
1056 | if (b != NULL) | |
1057 | diff = strlen (temp_bitname) - strlen (temp) - 1; | |
1058 | else | |
1059 | diff = strlen (reg_string) - strlen (temp) - 1; | |
1060 | ||
1061 | if (*(s + diff) != '\0') | |
1062 | { | |
1063 | as_bad (_("Illegal character after operand '%s'"), reg_string); | |
1064 | return NULL; | |
1065 | } | |
1066 | ||
1067 | return rb; | |
1068 | } | |
1069 | ||
1070 | static void | |
1071 | pfx_for_imm_val (int arg) | |
1072 | { | |
1073 | if (i.prefix == -1) | |
1074 | return; | |
1075 | ||
1076 | if (i.prefix == 0 && arg == 0 && PFX_INSN[1] == 0 && !(i.data_operands)) | |
1077 | return; | |
1078 | ||
1079 | if (!(i.prefix < 0) && !(i.prefix > 7)) | |
1080 | PFX_INSN[0] = (i.prefix << 4) | PFX0; | |
1081 | ||
1082 | if (!PFX_INSN[1]) | |
1083 | PFX_INSN[1] = arg; | |
1084 | ||
1085 | } | |
1086 | ||
1087 | static int | |
1088 | maxq20_immediate (char *imm_start) | |
1089 | { | |
1090 | int val = 0, val_pfx = 0; | |
1091 | char sign_val = 0; | |
1092 | int k = 0, j; | |
1093 | int temp[4] = { 0 }; | |
1094 | ||
1095 | imm_start++; | |
1096 | ||
1097 | if (imm_start[1] == '\0' && (imm_start[0] == '0' || imm_start[0] == '1') | |
1098 | && (this_operand == 1 && ((i.types[0] == BIT || i.types[0] == FLAG)))) | |
1099 | { | |
1100 | val = imm_start[0] - '0'; | |
1101 | i.imm_bit_operands++; | |
1102 | i.types[this_operand] = IMMBIT; | |
1103 | i.maxq20_op[this_operand].imms = (char) val; | |
1104 | #if CHANGE_PFX | |
1105 | if (i.prefix == 2) | |
1106 | pfx_for_imm_val (0); | |
1107 | #endif | |
1108 | return 1; | |
1109 | } | |
1110 | ||
708587a4 | 1111 | /* Check For Sign Character. */ |
7499d566 NC |
1112 | sign_val = 0; |
1113 | ||
1114 | do | |
1115 | { | |
1116 | if (imm_start[k] == '-' && k == 0) | |
1117 | sign_val = -1; | |
1118 | ||
1119 | else if (imm_start[k] == '+' && k == 0) | |
1120 | sign_val = 1; | |
1121 | ||
1122 | else if (isdigit (imm_start[k])) | |
1123 | temp[k] = imm_start[k] - '0'; | |
1124 | ||
1125 | else if (isalpha (imm_start[k]) | |
1126 | && (imm_start[k] = tolower (imm_start[k])) < 'g') | |
1127 | temp[k] = 10 + (int) (imm_start[k] - 'a'); | |
1128 | ||
1129 | else if (imm_start[k] == 'h') | |
1130 | break; | |
1131 | ||
1132 | else if (imm_start[k] == '\0') | |
1133 | { | |
1134 | imm_start[k] = 'd'; | |
1135 | break; | |
1136 | } | |
1137 | else | |
1138 | { | |
1139 | as_bad (_("Invalid Character in immediate Value : %c"), | |
1140 | imm_start[k]); | |
1141 | return 0; | |
1142 | } | |
1143 | k++; | |
1144 | } | |
1145 | while (imm_start[k] != '\n'); | |
1146 | ||
1147 | switch (imm_start[k]) | |
1148 | { | |
1149 | case 'h': | |
1150 | for (j = (sign_val ? 1 : 0); j < k; j++) | |
1151 | val += temp[j] * pwr (16, k - j - 1); | |
1152 | break; | |
1153 | ||
1154 | case 'd': | |
1155 | for (j = (sign_val ? 1 : 0); j < k; j++) | |
1156 | { | |
1157 | if (temp[j] > 9) | |
1158 | { | |
1159 | as_bad (_("Invalid Character in immediate value : %c"), | |
1160 | imm_start[j]); | |
1161 | return 0; | |
1162 | } | |
1163 | val += temp[j] * pwr (10, k - j - 1); | |
1164 | } | |
1165 | } | |
1166 | ||
1167 | if (!sign_val) | |
1168 | sign_val = 1; | |
1169 | ||
1170 | /* Now over here the value val stores the 8 bit/16 bit value. We will put a | |
1171 | check if we are moving a 16 bit immediate value into an 8 bit register. | |
1172 | In that case we will generate a warning and move only the lower 8 bits */ | |
1173 | if (val > 65535) | |
1174 | { | |
1175 | as_bad (_("Immediate value greater than 16 bits")); | |
1176 | return 0; | |
1177 | } | |
1178 | ||
1179 | val = val * sign_val; | |
1180 | ||
1181 | /* If it is a stack pointer and the value is greater than the maximum | |
1182 | permissible size */ | |
1183 | if (this_operand == 1) | |
1184 | { | |
1185 | if ((val * sign_val) > MAX_STACK && i.types[0] == REG | |
1186 | && !strcmp (i.maxq20_op[0].reg->reg_name, "SP")) | |
1187 | { | |
1188 | as_warn (_ | |
1189 | ("Attempt to move a value in the stack pointer greater than the size of the stack")); | |
1190 | val = val & MAX_STACK; | |
1191 | } | |
1192 | ||
1193 | /* Check the range for 8 bit registers. */ | |
1194 | else if (((val * sign_val) > 0xFF) && (i.types[0] == REG) | |
1195 | && (i.maxq20_op[0].reg->rtype == Reg_8W)) | |
1196 | { | |
1197 | as_warn (_ | |
1198 | ("Attempt to move 16 bit value into an 8 bit register.Truncating..\n")); | |
1199 | val = val & 0xfe; | |
1200 | } | |
1201 | ||
1202 | else if (((sign_val == -1) || (val > 0xFF)) && (i.types[0] == REG) | |
1203 | && (i.maxq20_op[0].reg->rtype == Reg_8W)) | |
1204 | { | |
1205 | val_pfx = val >> 8; | |
1206 | val = ((val) & 0x00ff); | |
1207 | SET_PFX_ARG (val_pfx); | |
1208 | i.maxq20_op[this_operand].imms = (char) val; | |
1209 | } | |
1210 | ||
1211 | else if ((val <= 0xff) && (i.types[0] == REG) | |
1212 | && (i.maxq20_op[0].reg->rtype == Reg_8W)) | |
1213 | i.maxq20_op[this_operand].imms = (char) val; | |
1214 | ||
1215 | ||
1216 | /* Check for 16 bit registers. */ | |
1217 | else if (((sign_val == -1) || val > 0xFE) && i.types[0] == REG | |
1218 | && i.maxq20_op[0].reg->rtype == Reg_16W) | |
1219 | { | |
1220 | /* Add PFX for any negative value -> 16bit register. */ | |
1221 | val_pfx = val >> 8; | |
1222 | val = ((val) & 0x00ff); | |
1223 | SET_PFX_ARG (val_pfx); | |
1224 | i.maxq20_op[this_operand].imms = (char) val; | |
1225 | } | |
1226 | ||
1227 | else if (val < 0xFF && i.types[0] == REG | |
1228 | && i.maxq20_op[0].reg->rtype == Reg_16W) | |
1229 | { | |
1230 | i.maxq20_op[this_operand].imms = (char) val; | |
1231 | } | |
1232 | ||
1233 | /* All the immediate memory access - no PFX. */ | |
1234 | else if (i.types[0] == MEM) | |
1235 | { | |
1236 | if ((sign_val == -1) || val > 0xFE) | |
1237 | { | |
1238 | val_pfx = val >> 8; | |
1239 | val = ((val) & 0x00ff); | |
1240 | SET_PFX_ARG (val_pfx); | |
1241 | i.maxq20_op[this_operand].imms = (char) val; | |
1242 | } | |
1243 | else | |
1244 | i.maxq20_op[this_operand].imms = (char) val; | |
1245 | } | |
1246 | ||
1247 | /* Special handling for immediate jumps like jump nz, #03h etc. */ | |
1248 | else if (val < 0xFF && i.types[0] == FLAG) | |
1249 | i.maxq20_op[this_operand].imms = (char) val; | |
1250 | ||
1251 | else if ((((sign_val == -1) || val > 0xFE)) && i.types[0] == FLAG) | |
1252 | { | |
1253 | val_pfx = val >> 8; | |
1254 | val = ((val) & 0x00ff); | |
1255 | SET_PFX_ARG (val_pfx); | |
1256 | i.maxq20_op[this_operand].imms = (char) val; | |
1257 | } | |
1258 | else | |
1259 | { | |
1260 | as_bad (_("Invalid immediate move operation")); | |
1261 | return 0; | |
1262 | } | |
1263 | } | |
1264 | else | |
1265 | { | |
1266 | /* All the instruction with operation on ACC: like ADD src, etc. */ | |
1267 | if ((sign_val == -1) || val > 0xFE) | |
1268 | { | |
1269 | val_pfx = val >> 8; | |
1270 | val = ((val) & 0x00ff); | |
1271 | SET_PFX_ARG (val_pfx); | |
1272 | i.maxq20_op[this_operand].imms = (char) val; | |
1273 | } | |
1274 | else | |
1275 | i.maxq20_op[this_operand].imms = (char) val; | |
1276 | } | |
1277 | ||
1278 | i.imm_operands++; | |
1279 | return 1; | |
1280 | } | |
1281 | ||
1282 | static int | |
1283 | extract_int_val (const char *imm_start) | |
1284 | { | |
1285 | int k, j, val; | |
1286 | char sign_val; | |
1287 | int temp[4]; | |
1288 | ||
1289 | k = 0; | |
1290 | j = 0; | |
1291 | val = 0; | |
1292 | sign_val = 0; | |
1293 | do | |
1294 | { | |
1295 | if (imm_start[k] == '-' && k == 0) | |
1296 | sign_val = -1; | |
1297 | ||
1298 | else if (imm_start[k] == '+' && k == 0) | |
1299 | sign_val = 1; | |
1300 | ||
1301 | else if (isdigit (imm_start[k])) | |
1302 | temp[k] = imm_start[k] - '0'; | |
1303 | ||
1304 | else if (isalpha (imm_start[k]) && (tolower (imm_start[k])) < 'g') | |
1305 | temp[k] = 10 + (int) (tolower (imm_start[k]) - 'a'); | |
1306 | ||
1307 | else if (tolower (imm_start[k]) == 'h') | |
1308 | break; | |
1309 | ||
1310 | else if ((imm_start[k] == '\0') || (imm_start[k] == ']')) | |
1311 | /* imm_start[k]='d'; */ | |
1312 | break; | |
1313 | ||
1314 | else | |
1315 | { | |
1316 | as_bad (_("Invalid Character in immediate Value : %c"), | |
1317 | imm_start[k]); | |
1318 | return 0; | |
1319 | } | |
1320 | k++; | |
1321 | } | |
1322 | while (imm_start[k] != '\n'); | |
1323 | ||
1324 | switch (imm_start[k]) | |
1325 | { | |
1326 | case 'h': | |
1327 | for (j = (sign_val ? 1 : 0); j < k; j++) | |
1328 | val += temp[j] * pwr (16, k - j - 1); | |
1329 | break; | |
1330 | ||
1331 | default: | |
1332 | for (j = (sign_val ? 1 : 0); j < k; j++) | |
1333 | { | |
1334 | if (temp[j] > 9) | |
1335 | { | |
1336 | as_bad (_("Invalid Character in immediate value : %c"), | |
1337 | imm_start[j]); | |
1338 | return 0; | |
1339 | } | |
1340 | val += temp[j] * pwr (10, k - j - 1); | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | if (!sign_val) | |
1345 | sign_val = 1; | |
1346 | ||
1347 | return val * sign_val; | |
1348 | } | |
1349 | ||
1350 | static char | |
1351 | check_for_parse (const char *line) | |
1352 | { | |
1353 | int val; | |
1354 | ||
1355 | if (*(line + 1) == '[') | |
1356 | { | |
1357 | do | |
1358 | { | |
1359 | line++; | |
1360 | if ((*line == '-') || (*line == '+')) | |
1361 | break; | |
1362 | } | |
1363 | while (!is_space_char (*line)); | |
1364 | ||
1365 | if ((*line == '-') || (*line == '+')) | |
1366 | val = extract_int_val (line); | |
1367 | else | |
1368 | val = extract_int_val (line + 1); | |
1369 | ||
1370 | INSERT_BUFFER[0] = 0x3E; | |
1371 | INSERT_BUFFER[1] = val; | |
1372 | ||
1373 | return 1; | |
1374 | } | |
1375 | ||
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | static mem_access * | |
1380 | maxq20_mem_access (char *mem_string, char **end_op) | |
1381 | { | |
1382 | char *s = mem_string; | |
1383 | char *p; | |
1384 | char mem_name_given[MAX_MEM_NAME_SIZE + 1]; | |
1385 | mem_access *m; | |
1386 | ||
1387 | m = NULL; | |
1388 | ||
1389 | /* Skip possible whitespace. */ | |
1390 | if (is_space_char (*s)) | |
1391 | ++s; | |
1392 | ||
1393 | p = mem_name_given; | |
1394 | while ((*p++ = register_chars[(unsigned char) *s]) != '\0') | |
1395 | { | |
1396 | if (p >= mem_name_given + MAX_MEM_NAME_SIZE) | |
1397 | return (mem_access *) NULL; | |
1398 | s++; | |
1399 | } | |
1400 | ||
1401 | *end_op = s; | |
1402 | ||
1403 | m = (mem_access *) hash_find (mem_hash, mem_name_given); | |
1404 | ||
1405 | return m; | |
1406 | } | |
1407 | ||
1408 | /* This function checks whether the operand is a variable in the data segment | |
1409 | and if so, it returns its symbol entry from the symbol table. */ | |
1410 | ||
1411 | static symbolS * | |
1412 | maxq20_data (char *op_string) | |
1413 | { | |
1414 | symbolS *symbolP; | |
1415 | symbolP = symbol_find (op_string); | |
1416 | ||
1417 | if (symbolP != NULL | |
1418 | && S_GET_SEGMENT (symbolP) != now_seg | |
7be1c489 | 1419 | && S_GET_SEGMENT (symbolP) != bfd_und_section_ptr) |
7499d566 | 1420 | { |
7499d566 NC |
1421 | /* In case we do not want to always include the prefix instruction and |
1422 | let the loader handle the job or in case of a 8 bit addressing mode, | |
1423 | we will just check for val_pfx to be equal to zero and then load the | |
1424 | prefix instruction. Otherwise no prefix instruction needs to be | |
1425 | loaded. */ | |
1426 | /* The prefix register will have to be loaded automatically as we have | |
1427 | a 16 bit addressing field. */ | |
7be1c489 | 1428 | pfx_for_imm_val (0); |
7499d566 NC |
1429 | return symbolP; |
1430 | } | |
1431 | ||
1432 | return NULL; | |
1433 | } | |
1434 | ||
1435 | static int | |
1436 | maxq20_displacement (char *disp_start, char *disp_end) | |
1437 | { | |
1438 | expressionS *exp; | |
1439 | segT exp_seg = 0; | |
1440 | char *save_input_line_pointer; | |
1441 | #ifndef LEX_AT | |
1442 | char *gotfree_input_line; | |
1443 | #endif | |
1444 | ||
1445 | gotfree_input_line = NULL; | |
1446 | exp = &disp_expressions; | |
1447 | i.maxq20_op[this_operand].disps = exp; | |
1448 | i.disp_operands++; | |
1449 | save_input_line_pointer = input_line_pointer; | |
1450 | input_line_pointer = disp_start; | |
1451 | ||
1452 | END_STRING_AND_SAVE (disp_end); | |
1453 | ||
1454 | #ifndef LEX_AT | |
1455 | /* gotfree_input_line = lex_got (&i.reloc[this_operand], NULL); if | |
1456 | (gotfree_input_line) input_line_pointer = gotfree_input_line; */ | |
1457 | #endif | |
1458 | exp_seg = expression (exp); | |
1459 | ||
1460 | SKIP_WHITESPACE (); | |
1461 | if (*input_line_pointer) | |
1462 | as_bad (_("junk `%s' after expression"), input_line_pointer); | |
1463 | #if GCC_ASM_O_HACK | |
1464 | RESTORE_END_STRING (disp_end + 1); | |
1465 | #endif | |
1466 | RESTORE_END_STRING (disp_end); | |
1467 | input_line_pointer = save_input_line_pointer; | |
1468 | #ifndef LEX_AT | |
1469 | if (gotfree_input_line) | |
1470 | free (gotfree_input_line); | |
1471 | #endif | |
1472 | if (exp->X_op == O_absent || exp->X_op == O_big) | |
1473 | { | |
1474 | /* Missing or bad expr becomes absolute 0. */ | |
1475 | as_bad (_("missing or invalid displacement expression `%s' taken as 0"), | |
1476 | disp_start); | |
1477 | exp->X_op = O_constant; | |
1478 | exp->X_add_number = 0; | |
1479 | exp->X_add_symbol = (symbolS *) 0; | |
1480 | exp->X_op_symbol = (symbolS *) 0; | |
1481 | } | |
1482 | #if (defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT)) | |
1483 | ||
1484 | if (exp->X_op != O_constant | |
7499d566 | 1485 | && OUTPUT_FLAVOR == bfd_target_aout_flavour |
7499d566 NC |
1486 | && exp_seg != absolute_section |
1487 | && exp_seg != text_section | |
1488 | && exp_seg != data_section | |
1489 | && exp_seg != bss_section && exp_seg != undefined_section | |
7be1c489 | 1490 | && !bfd_is_com_section (exp_seg)) |
7499d566 | 1491 | { |
7499d566 | 1492 | as_bad (_("unimplemented segment %s in operand"), exp_seg->name); |
7499d566 NC |
1493 | return 0; |
1494 | } | |
1495 | #endif | |
1496 | i.maxq20_op[this_operand].disps = exp; | |
1497 | return 1; | |
1498 | } | |
1499 | ||
1500 | /* Parse OPERAND_STRING into the maxq20_insn structure I. | |
1501 | Returns non-zero on error. */ | |
1502 | ||
1503 | static int | |
1504 | maxq20_operand (char *operand_string) | |
1505 | { | |
1506 | reg_entry *r = NULL; | |
1507 | reg_bit *rb = NULL; | |
1508 | mem_access *m = NULL; | |
1509 | char *end_op = NULL; | |
1510 | symbolS *sym = NULL; | |
1511 | char *base_string = NULL; | |
1512 | int ii = 0; | |
1513 | /* Start and end of displacement string expression (if found). */ | |
1514 | char *displacement_string_start = NULL; | |
1515 | char *displacement_string_end = NULL; | |
1516 | /* This maintains the case sentivness. */ | |
1517 | char case_str_op_string[MAX_OPERAND_SIZE + 1]; | |
1518 | char str_op_string[MAX_OPERAND_SIZE + 1]; | |
1519 | char *org_case_op_string = case_str_op_string; | |
1520 | char *op_string = str_op_string; | |
1521 | ||
1522 | ||
1523 | memset (op_string, END_OF_INSN, (MAX_OPERAND_SIZE + 1)); | |
1524 | memset (org_case_op_string, END_OF_INSN, (MAX_OPERAND_SIZE + 1)); | |
1525 | ||
1526 | memcpy (op_string, operand_string, strlen (operand_string) + 1); | |
1527 | memcpy (org_case_op_string, operand_string, strlen (operand_string) + 1); | |
1528 | ||
1529 | ii = strlen (operand_string) + 1; | |
1530 | ||
1531 | if (ii > MAX_OPERAND_SIZE) | |
1532 | { | |
1533 | as_bad (_("Size of Operand '%s' greater than %d"), op_string, | |
1534 | MAX_OPERAND_SIZE); | |
1535 | return 0; | |
1536 | } | |
1537 | ||
1538 | while (ii) | |
1539 | { | |
1540 | op_string[ii - 1] = toupper ((char) op_string[ii - 1]); | |
1541 | ii--; | |
1542 | } | |
1543 | ||
1544 | if (is_space_char (*op_string)) | |
1545 | ++op_string; | |
1546 | ||
1547 | if (isxdigit (operand_string[0])) | |
1548 | { | |
1549 | /* Now the operands can start with an Integer. */ | |
1550 | r = parse_reg_by_index (op_string); | |
1551 | if (r != NULL) | |
1552 | { | |
1553 | if (is_space_char (*op_string)) | |
1554 | ++op_string; | |
1555 | i.types[this_operand] = REG; /* Set the type. */ | |
1556 | i.maxq20_op[this_operand].reg = r; /* Set the Register value. */ | |
1557 | i.reg_operands++; | |
1558 | return 1; | |
1559 | } | |
1560 | ||
708587a4 | 1561 | /* Get the original string. */ |
7499d566 NC |
1562 | memcpy (op_string, operand_string, strlen (operand_string) + 1); |
1563 | ii = strlen (operand_string) + 1; | |
1564 | ||
1565 | while (ii) | |
1566 | { | |
1567 | op_string[ii - 1] = toupper ((char) op_string[ii - 1]); | |
1568 | ii--; | |
1569 | } | |
1570 | } | |
1571 | ||
1572 | /* Check for flags. */ | |
1573 | if (!strcmp (op_string, "Z")) | |
1574 | { | |
1575 | if (is_space_char (*op_string)) | |
1576 | ++op_string; | |
1577 | ||
1578 | i.types[this_operand] = FLAG; /* Set the type. */ | |
1579 | i.maxq20_op[this_operand].flag = FLAG_Z; /* Set the Register value. */ | |
1580 | ||
1581 | i.flag_operands++; | |
1582 | ||
1583 | return 1; | |
1584 | } | |
1585 | ||
1586 | else if (!strcmp (op_string, "NZ")) | |
1587 | { | |
1588 | if (is_space_char (*op_string)) | |
1589 | ++op_string; | |
1590 | ||
1591 | i.types[this_operand] = FLAG; /* Set the type. */ | |
1592 | i.maxq20_op[this_operand].flag = FLAG_NZ; /* Set the Register value. */ | |
1593 | i.flag_operands++; | |
1594 | return 1; | |
1595 | } | |
1596 | ||
1597 | else if (!strcmp (op_string, "NC")) | |
1598 | { | |
1599 | if (is_space_char (*op_string)) | |
1600 | ++op_string; | |
1601 | ||
1602 | i.types[this_operand] = FLAG; /* Set the type. */ | |
1603 | i.maxq20_op[this_operand].flag = FLAG_NC; /* Set the Register value. */ | |
1604 | i.flag_operands++; | |
1605 | return 1; | |
1606 | } | |
1607 | ||
1608 | else if (!strcmp (op_string, "E")) | |
1609 | { | |
1610 | if (is_space_char (*op_string)) | |
1611 | ++op_string; | |
1612 | ||
1613 | i.types[this_operand] = FLAG; /* Set the type. */ | |
1614 | i.maxq20_op[this_operand].flag = FLAG_E; /* Set the Register value. */ | |
1615 | ||
1616 | i.flag_operands++; | |
1617 | ||
1618 | return 1; | |
1619 | } | |
1620 | ||
1621 | else if (!strcmp (op_string, "S")) | |
1622 | { | |
1623 | if (is_space_char (*op_string)) | |
1624 | ++op_string; | |
1625 | ||
1626 | i.types[this_operand] = FLAG; /* Set the type. */ | |
1627 | i.maxq20_op[this_operand].flag = FLAG_S; /* Set the Register value. */ | |
1628 | ||
1629 | i.flag_operands++; | |
1630 | ||
1631 | return 1; | |
1632 | } | |
1633 | ||
1634 | else if (!strcmp (op_string, "C")) | |
1635 | { | |
1636 | if (is_space_char (*op_string)) | |
1637 | ++op_string; | |
1638 | ||
1639 | i.types[this_operand] = FLAG; /* Set the type. */ | |
1640 | i.maxq20_op[this_operand].flag = FLAG_C; /* Set the Register value. */ | |
1641 | ||
1642 | i.flag_operands++; | |
1643 | ||
1644 | return 1; | |
1645 | } | |
1646 | ||
1647 | else if (!strcmp (op_string, "NE")) | |
1648 | { | |
1649 | ||
1650 | if (is_space_char (*op_string)) | |
1651 | ++op_string; | |
1652 | ||
1653 | i.types[this_operand] = FLAG; /* Set the type. */ | |
1654 | ||
1655 | i.maxq20_op[this_operand].flag = FLAG_NE; /* Set the Register value. */ | |
1656 | ||
1657 | i.flag_operands++; | |
1658 | ||
1659 | return 1; | |
1660 | } | |
1661 | ||
1662 | /* CHECK FOR REGISTER BIT */ | |
1663 | else if ((rb = parse_register_bit (op_string, &end_op)) != NULL) | |
1664 | { | |
1665 | op_string = end_op; | |
1666 | ||
1667 | if (is_space_char (*op_string)) | |
1668 | ++op_string; | |
1669 | ||
1670 | i.types[this_operand] = BIT; | |
1671 | ||
1672 | i.maxq20_op[this_operand].r_bit = rb; | |
1673 | ||
1674 | i.bit_operands++; | |
1675 | ||
1676 | return 1; | |
1677 | } | |
1678 | ||
1679 | else if (*op_string == IMMEDIATE_PREFIX) /* FOR IMMEDITE. */ | |
1680 | { | |
1681 | if (is_space_char (*op_string)) | |
1682 | ++op_string; | |
1683 | ||
1684 | i.types[this_operand] = IMM; | |
1685 | ||
1686 | if (!maxq20_immediate (op_string)) | |
1687 | { | |
1688 | as_bad (_("illegal immediate operand '%s'"), op_string); | |
1689 | return 0; | |
1690 | } | |
1691 | return 1; | |
1692 | } | |
1693 | ||
1694 | else if (*op_string == ABSOLUTE_PREFIX || !strcmp (op_string, "NUL")) | |
1695 | { | |
1696 | if (is_space_char (*op_string)) | |
1697 | ++op_string; | |
1698 | ||
1699 | /* For new requiremnt of copiler of for, @(BP,cons). */ | |
1700 | if (check_for_parse (op_string)) | |
1701 | { | |
1702 | memset (op_string, '\0', strlen (op_string) + 1); | |
1703 | memcpy (op_string, "@BP[OFFS]\0", 11); | |
1704 | } | |
1705 | ||
1706 | i.types[this_operand] = MEM; | |
1707 | ||
1708 | if ((m = maxq20_mem_access (op_string, &end_op)) == NULL) | |
1709 | { | |
1710 | as_bad (_("Invalid operand for memory access '%s'"), op_string); | |
1711 | return 0; | |
1712 | } | |
1713 | i.maxq20_op[this_operand].mem = m; | |
1714 | ||
1715 | i.mem_operands++; | |
1716 | ||
1717 | return 1; | |
1718 | } | |
1719 | ||
1720 | else if ((r = parse_register (op_string, &end_op)) != NULL) /* Check for register. */ | |
1721 | { | |
1722 | op_string = end_op; | |
1723 | ||
1724 | if (is_space_char (*op_string)) | |
1725 | ++op_string; | |
1726 | ||
1727 | i.types[this_operand] = REG; /* Set the type. */ | |
1728 | i.maxq20_op[this_operand].reg = r; /* Set the Register value. */ | |
1729 | i.reg_operands++; | |
1730 | return 1; | |
1731 | } | |
1732 | ||
1733 | if (this_operand == 1) | |
1734 | { | |
1735 | /* Changed for orginal case of data refrence on 30 Nov 2003. */ | |
1736 | /* The operand can either be a data reference or a symbol reference. */ | |
1737 | if ((sym = maxq20_data (org_case_op_string)) != NULL) /* Check for data memory. */ | |
1738 | { | |
1739 | while (is_space_char (*op_string)) | |
1740 | ++op_string; | |
1741 | ||
1742 | /* Set the type of the operand. */ | |
1743 | i.types[this_operand] = DATA; | |
1744 | ||
1745 | /* Set the value of the data. */ | |
1746 | i.maxq20_op[this_operand].data = sym; | |
1747 | i.data_operands++; | |
1748 | ||
1749 | return 1; | |
1750 | } | |
1751 | ||
1752 | else if (is_digit_char (*op_string) || is_identifier_char (*op_string)) | |
1753 | { | |
1754 | /* This is a memory reference of some sort. char *base_string; | |
1755 | Start and end of displacement string expression (if found). char | |
1756 | *displacement_string_start; char *displacement_string_end. */ | |
1757 | base_string = org_case_op_string + strlen (org_case_op_string); | |
1758 | ||
1759 | --base_string; | |
1760 | if (is_space_char (*base_string)) | |
1761 | --base_string; | |
1762 | ||
1763 | /* If we only have a displacement, set-up for it to be parsed | |
1764 | later. */ | |
1765 | displacement_string_start = org_case_op_string; | |
1766 | displacement_string_end = base_string + 1; | |
1767 | if (displacement_string_start != displacement_string_end) | |
1768 | { | |
1769 | if (!maxq20_displacement (displacement_string_start, | |
1770 | displacement_string_end)) | |
1771 | { | |
1772 | as_bad (_("illegal displacement operand ")); | |
1773 | return 0; | |
1774 | } | |
1775 | /* A displacement operand found. */ | |
1776 | i.types[this_operand] = DISP; /* Set the type. */ | |
1777 | return 1; | |
1778 | } | |
1779 | } | |
1780 | } | |
1781 | ||
1782 | /* Check for displacement. */ | |
1783 | else if (is_digit_char (*op_string) || is_identifier_char (*op_string)) | |
1784 | { | |
1785 | /* This is a memory reference of some sort. char *base_string; | |
1786 | Start and end of displacement string expression (if found). char | |
1787 | *displacement_string_start; char *displacement_string_end; */ | |
1788 | base_string = org_case_op_string + strlen (org_case_op_string); | |
1789 | ||
1790 | --base_string; | |
1791 | if (is_space_char (*base_string)) | |
1792 | --base_string; | |
1793 | ||
1794 | /* If we only have a displacement, set-up for it to be parsed later. */ | |
1795 | displacement_string_start = org_case_op_string; | |
1796 | displacement_string_end = base_string + 1; | |
1797 | if (displacement_string_start != displacement_string_end) | |
1798 | { | |
1799 | if (!maxq20_displacement (displacement_string_start, | |
1800 | displacement_string_end)) | |
1801 | return 0; | |
1802 | /* A displacement operand found. */ | |
1803 | i.types[this_operand] = DISP; /* Set the type. */ | |
1804 | } | |
1805 | } | |
1806 | return 1; | |
1807 | } | |
1808 | ||
1809 | /* Parse_operand takes as input instruction and operands and Parse operands | |
1810 | and makes entry in the template. */ | |
1811 | ||
1812 | static char * | |
1813 | parse_operands (char *l, const char *mnemonic) | |
1814 | { | |
1815 | char *token_start; | |
1816 | ||
1817 | /* 1 if operand is pending after ','. */ | |
1818 | short int expecting_operand = 0; | |
1819 | ||
1820 | /* Non-zero if operand parens not balanced. */ | |
1821 | short int paren_not_balanced; | |
1822 | ||
1823 | int operand_ok; | |
1824 | ||
1825 | /* For Overcoming Warning of unused variable. */ | |
1826 | if (mnemonic) | |
1827 | operand_ok = 0; | |
1828 | ||
1829 | while (*l != END_OF_INSN) | |
1830 | { | |
1831 | /* Skip optional white space before operand. */ | |
1832 | if (is_space_char (*l)) | |
1833 | ++l; | |
1834 | ||
1835 | if (!is_operand_char (*l) && *l != END_OF_INSN) | |
1836 | { | |
1837 | as_bad (_("invalid character %c before operand %d"), | |
1838 | (char) (*l), i.operands + 1); | |
1839 | return NULL; | |
1840 | } | |
1841 | token_start = l; | |
1842 | ||
1843 | paren_not_balanced = 0; | |
1844 | while (paren_not_balanced || *l != ',') | |
1845 | { | |
1846 | if (*l == END_OF_INSN) | |
1847 | { | |
1848 | if (paren_not_balanced) | |
1849 | { | |
1850 | as_bad (_("unbalanced brackets in operand %d."), | |
1851 | i.operands + 1); | |
1852 | return NULL; | |
1853 | } | |
1854 | ||
1855 | break; | |
1856 | } | |
1857 | else if (!is_operand_char (*l) && !is_space_char (*l)) | |
1858 | { | |
1859 | as_bad (_("invalid character %c in operand %d"), | |
1860 | (char) (*l), i.operands + 1); | |
1861 | return NULL; | |
1862 | } | |
1863 | if (*l == '[') | |
1864 | ++paren_not_balanced; | |
1865 | if (*l == ']') | |
1866 | --paren_not_balanced; | |
1867 | l++; | |
1868 | } | |
1869 | ||
1870 | if (l != token_start) | |
1871 | { | |
1872 | /* Yes, we've read in another operand. */ | |
1873 | this_operand = i.operands++; | |
1874 | if (i.operands > MAX_OPERANDS) | |
1875 | { | |
1876 | as_bad (_("spurious operands; (%d operands/instruction max)"), | |
1877 | MAX_OPERANDS); | |
1878 | return NULL; | |
1879 | } | |
1880 | ||
1881 | /* Now parse operand adding info to 'i' as we go along. */ | |
1882 | END_STRING_AND_SAVE (l); | |
1883 | ||
1884 | operand_ok = maxq20_operand (token_start); | |
1885 | ||
1886 | RESTORE_END_STRING (l); | |
1887 | ||
1888 | if (!operand_ok) | |
1889 | return NULL; | |
1890 | } | |
1891 | else | |
1892 | { | |
1893 | if (expecting_operand) | |
1894 | { | |
1895 | expecting_operand_after_comma: | |
1896 | as_bad (_("expecting operand after ','; got nothing")); | |
1897 | return NULL; | |
1898 | } | |
1899 | } | |
1900 | ||
1901 | if (*l == ',') | |
1902 | { | |
1903 | if (*(++l) == END_OF_INSN) | |
1904 | /* Just skip it, if it's \n complain. */ | |
1905 | goto expecting_operand_after_comma; | |
1906 | ||
1907 | expecting_operand = 1; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | return l; | |
1912 | } | |
1913 | ||
1914 | static int | |
1915 | match_operands (int type, MAX_ARG_TYPE flag_type, MAX_ARG_TYPE arg_type, | |
1916 | int op_num) | |
1917 | { | |
1918 | switch (type) | |
1919 | { | |
1920 | case REG: | |
1921 | if ((arg_type & A_REG) == A_REG) | |
1922 | return 1; | |
1923 | break; | |
1924 | case IMM: | |
1925 | if ((arg_type & A_IMM) == A_IMM) | |
1926 | return 1; | |
1927 | break; | |
1928 | case IMMBIT: | |
1929 | if ((arg_type & A_BIT_0) == A_BIT_0 && (i.maxq20_op[op_num].imms == 0)) | |
1930 | return 1; | |
1931 | else if ((arg_type & A_BIT_1) == A_BIT_1 | |
1932 | && (i.maxq20_op[op_num].imms == 1)) | |
1933 | return 1; | |
1934 | break; | |
1935 | case MEM: | |
1936 | if ((arg_type & A_MEM) == A_MEM) | |
1937 | return 1; | |
1938 | break; | |
1939 | ||
1940 | case FLAG: | |
1941 | if ((arg_type & flag_type) == flag_type) | |
1942 | return 1; | |
1943 | ||
1944 | break; | |
1945 | ||
1946 | case BIT: | |
1947 | if ((arg_type & ACC_BIT) == ACC_BIT && !strcmp (i.maxq20_op[op_num].r_bit->reg->reg_name, "ACC")) | |
1948 | return 1; | |
1949 | else if ((arg_type & SRC_BIT) == SRC_BIT && (op_num == 1)) | |
1950 | return 1; | |
1951 | else if ((op_num == 0) && (arg_type & DST_BIT) == DST_BIT) | |
1952 | return 1; | |
1953 | break; | |
1954 | case DISP: | |
1955 | if ((arg_type & A_DISP) == A_DISP) | |
1956 | return 1; | |
1957 | case DATA: | |
1958 | if ((arg_type & A_DATA) == A_DATA) | |
1959 | return 1; | |
1960 | case BIT_BUCKET: | |
1961 | if ((arg_type & A_BIT_BUCKET) == A_BIT_BUCKET) | |
1962 | return 1; | |
1963 | } | |
1964 | return 0; | |
1965 | } | |
1966 | ||
1967 | static int | |
1968 | match_template (void) | |
1969 | { | |
1970 | /* Points to template once we've found it. */ | |
1971 | const MAXQ20_OPCODE_INFO *t; | |
1972 | char inv_oper; | |
1973 | inv_oper = 0; | |
1974 | ||
1975 | for (t = current_templates->start; t < current_templates->end; t++) | |
1976 | { | |
1977 | /* Must have right number of operands. */ | |
1978 | if (i.operands != t->op_number) | |
1979 | continue; | |
1980 | else if (!t->op_number) | |
1981 | break; | |
1982 | ||
1983 | switch (i.operands) | |
1984 | { | |
1985 | case 2: | |
1986 | if (!match_operands (i.types[1], i.maxq20_op[1].flag, t->arg[1], 1)) | |
1987 | { | |
1988 | inv_oper = 1; | |
1989 | continue; | |
1990 | } | |
1991 | case 1: | |
1992 | if (!match_operands (i.types[0], i.maxq20_op[0].flag, t->arg[0], 0)) | |
1993 | { | |
1994 | inv_oper = 2; | |
1995 | continue; | |
1996 | } | |
1997 | } | |
1998 | break; | |
1999 | } | |
2000 | ||
2001 | if (t == current_templates->end) | |
2002 | { | |
2003 | /* We found no match. */ | |
2004 | as_bad (_("operand %d is invalid for `%s'"), | |
2005 | inv_oper, current_templates->start->name); | |
2006 | return 0; | |
2007 | } | |
2008 | ||
2009 | /* Copy the template we have found. */ | |
2010 | i.op = *t; | |
2011 | return 1; | |
2012 | } | |
2013 | ||
2014 | /* This function filters out the various combinations of operands which are | |
2015 | not allowed for a particular instruction. */ | |
2016 | ||
2017 | static int | |
2018 | match_filters (void) | |
2019 | { | |
2020 | /* Now we have at our disposal the instruction i. We will be using the | |
2021 | following fields i.op.name : This is the mnemonic name. i.types[2] : | |
2022 | These are the types of the operands (REG/IMM/DISP/MEM/BIT/FLAG/IMMBIT) | |
2023 | i.maxq20_op[2] : This contains the specific info of the operands. */ | |
2024 | ||
2025 | /* Our first filter : NO ALU OPERATIONS CAN HAVE THE ACTIVE ACCUMULATOR AS | |
2026 | SOURCE. */ | |
2027 | if (!strcmp (i.op.name, "AND") || !strcmp (i.op.name, "OR") | |
2028 | || !strcmp (i.op.name, "XOR") || !strcmp (i.op.name, "ADD") | |
2029 | || !strcmp (i.op.name, "ADDC") || !strcmp (i.op.name, "SUB") | |
2030 | || !strcmp (i.op.name, "SUBB")) | |
2031 | { | |
2032 | if (i.types[0] == REG) | |
2033 | { | |
2034 | if (i.maxq20_op[0].reg->Mod_name == 0xa) | |
2035 | { | |
2036 | as_bad (_ | |
2037 | ("The Accumulator cannot be used as a source in ALU instructions\n")); | |
2038 | return 0; | |
2039 | } | |
2040 | } | |
2041 | } | |
2042 | ||
2043 | if (!strcmp (i.op.name, "MOVE") && (i.types[0] == MEM || i.types[1] == MEM) | |
2044 | && i.operands == 2) | |
2045 | { | |
2046 | mem_access_syntax *mem_op = NULL; | |
2047 | ||
2048 | if (i.types[0] == MEM) | |
2049 | { | |
2050 | mem_op = | |
2051 | (mem_access_syntax *) hash_find (mem_syntax_hash, | |
2052 | i.maxq20_op[0].mem->name); | |
2053 | if ((mem_op->type == SRC) && mem_op) | |
2054 | { | |
2055 | as_bad (_("'%s' operand cant be used as destination in %s"), | |
2056 | mem_op->name, i.op.name); | |
2057 | return 0; | |
2058 | } | |
2059 | else if ((mem_op->invalid_op != NULL) && (i.types[1] == MEM) | |
2060 | && mem_op) | |
2061 | { | |
2062 | int k = 0; | |
2063 | ||
2064 | for (k = 0; k < 5 || !mem_op->invalid_op[k]; k++) | |
2065 | { | |
2066 | if (mem_op->invalid_op[k] != NULL) | |
2067 | if (!strcmp | |
2068 | (mem_op->invalid_op[k], i.maxq20_op[1].mem->name)) | |
2069 | { | |
2070 | as_bad (_ | |
2071 | ("Invalid Instruction '%s' operand cant be used with %s"), | |
2072 | mem_op->name, i.maxq20_op[1].mem->name); | |
2073 | return 0; | |
2074 | } | |
2075 | } | |
2076 | } | |
2077 | } | |
2078 | ||
2079 | if (i.types[1] == MEM) | |
2080 | { | |
2081 | mem_op = NULL; | |
2082 | mem_op = | |
2083 | (mem_access_syntax *) hash_find (mem_syntax_hash, | |
2084 | i.maxq20_op[1].mem->name); | |
2085 | if (mem_op->type == DST && mem_op) | |
2086 | { | |
2087 | as_bad (_("'%s' operand cant be used as source in %s"), | |
2088 | mem_op->name, i.op.name); | |
2089 | return 0; | |
2090 | } | |
2091 | else if (mem_op->invalid_op != NULL && i.types[0] == MEM && mem_op) | |
2092 | { | |
2093 | int k = 0; | |
2094 | ||
2095 | for (k = 0; k < 5 || !mem_op->invalid_op[k]; k++) | |
2096 | { | |
2097 | if (mem_op->invalid_op[k] != NULL) | |
2098 | if (!strcmp | |
2099 | (mem_op->invalid_op[k], i.maxq20_op[0].mem->name)) | |
2100 | { | |
2101 | as_bad (_ | |
2102 | ("Invalid Instruction '%s' operand cant be used with %s"), | |
2103 | mem_op->name, i.maxq20_op[0].mem->name); | |
2104 | return 0; | |
2105 | } | |
2106 | } | |
2107 | } | |
2108 | else if (i.types[0] == REG | |
2109 | && !strcmp (i.maxq20_op[0].reg->reg_name, "OFFS") | |
2110 | && mem_op) | |
2111 | { | |
2112 | if (!strcmp (mem_op->name, "@BP[OFFS--]") | |
2113 | || !strcmp (mem_op->name, "@BP[OFFS++]")) | |
2114 | { | |
2115 | as_bad (_ | |
2116 | ("Invalid Instruction '%s' operand cant be used with %s"), | |
2117 | mem_op->name, i.maxq20_op[0].mem->name); | |
2118 | return 0; | |
2119 | } | |
2120 | } | |
2121 | } | |
2122 | } | |
2123 | ||
2124 | /* Added for SRC and DST in one operand instructioni i.e OR @--DP[1] added | |
2125 | on 10-March-2004. */ | |
2126 | if ((i.types[0] == MEM) && (i.operands == 1) | |
2127 | && !(!strcmp (i.op.name, "POP") || !strcmp (i.op.name, "POPI"))) | |
2128 | { | |
2129 | mem_access_syntax *mem_op = NULL; | |
2130 | ||
2131 | if (i.types[0] == MEM) | |
2132 | { | |
2133 | mem_op = | |
2134 | (mem_access_syntax *) hash_find (mem_syntax_hash, | |
2135 | i.maxq20_op[0].mem->name); | |
2136 | if (mem_op->type == DST && mem_op) | |
2137 | { | |
2138 | as_bad (_("'%s' operand cant be used as source in %s"), | |
2139 | mem_op->name, i.op.name); | |
2140 | return 0; | |
2141 | } | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | if (i.operands == 2 && i.types[0] == IMM) | |
2146 | { | |
2147 | as_bad (_("'%s' instruction cant have first operand as Immediate vale"), | |
2148 | i.op.name); | |
2149 | return 0; | |
2150 | } | |
2151 | ||
2152 | /* Our second filter : SP or @SP-- cannot be used with PUSH or POP */ | |
2153 | if (!strcmp (i.op.name, "PUSH") || !strcmp (i.op.name, "POP") | |
2154 | || !strcmp (i.op.name, "POPI")) | |
2155 | { | |
2156 | if (i.types[0] == REG) | |
2157 | { | |
2158 | if (!strcmp (i.maxq20_op[0].reg->reg_name, "SP")) | |
2159 | { | |
2160 | as_bad (_("SP cannot be used with %s\n"), i.op.name); | |
2161 | return 0; | |
2162 | } | |
2163 | } | |
2164 | else if (i.types[0] == MEM | |
2165 | && !strcmp (i.maxq20_op[0].mem->name, "@SP--")) | |
2166 | { | |
2167 | as_bad (_("@SP-- cannot be used with PUSH\n")); | |
2168 | return 0; | |
2169 | } | |
2170 | } | |
2171 | ||
2172 | /* This filter checks that two memory references using DP's cannot be used | |
2173 | together in an instruction */ | |
2174 | if (!strcmp (i.op.name, "MOVE") && i.mem_operands == 2) | |
2175 | { | |
2176 | if (strlen (i.maxq20_op[0].mem->name) != 6 || | |
2177 | strcmp (i.maxq20_op[0].mem->name, i.maxq20_op[1].mem->name)) | |
2178 | { | |
2179 | if (!strncmp (i.maxq20_op[0].mem->name, "@DP", 3) | |
2180 | && !strncmp (i.maxq20_op[1].mem->name, "@DP", 3)) | |
2181 | { | |
2182 | as_bad (_ | |
2183 | ("Operands either contradictory or use the data bus in read/write state together")); | |
2184 | return 0; | |
2185 | } | |
2186 | ||
2187 | if (!strncmp (i.maxq20_op[0].mem->name, "@SP", 3) | |
2188 | && !strncmp (i.maxq20_op[1].mem->name, "@SP", 3)) | |
2189 | { | |
2190 | as_bad (_ | |
2191 | ("Operands either contradictory or use the data bus in read/write state together")); | |
2192 | return 0; | |
2193 | } | |
2194 | } | |
2195 | if ((i.maxq20_op[1].mem != NULL) | |
2196 | && !strncmp (i.maxq20_op[1].mem->name, "NUL", 3)) | |
2197 | { | |
2198 | as_bad (_("MOVE Cant Use NUL as SRC")); | |
2199 | return 0; | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | /* This filter checks that contradictory movement between DP register and | |
2204 | Memory access using DP followed by increment or decrement. */ | |
2205 | ||
2206 | if (!strcmp (i.op.name, "MOVE") && i.mem_operands == 1 | |
2207 | && i.reg_operands == 1) | |
2208 | { | |
2209 | int memnum, regnum; | |
2210 | ||
2211 | memnum = (i.types[0] == MEM) ? 0 : 1; | |
2212 | regnum = (memnum == 0) ? 1 : 0; | |
2213 | if (!strncmp (i.maxq20_op[regnum].reg->reg_name, "DP", 2) && | |
2214 | !strncmp ((i.maxq20_op[memnum].mem->name) + 1, | |
2215 | i.maxq20_op[regnum].reg->reg_name, 5) | |
2216 | && strcmp ((i.maxq20_op[memnum].mem->name) + 1, | |
2217 | i.maxq20_op[regnum].reg->reg_name)) | |
2218 | { | |
2219 | as_bad (_ | |
2220 | ("Contradictory movement between DP register and memory access using DP")); | |
2221 | return 0; | |
2222 | } | |
2223 | else if (!strcmp (i.maxq20_op[regnum].reg->reg_name, "SP") && | |
2224 | !strncmp ((i.maxq20_op[memnum].mem->name) + 1, | |
2225 | i.maxq20_op[regnum].reg->reg_name, 2)) | |
2226 | { | |
2227 | as_bad (_ | |
2228 | ("SP and @SP-- cannot be used together in a move instruction")); | |
2229 | return 0; | |
2230 | } | |
2231 | } | |
2232 | ||
2233 | /* This filter restricts the instructions containing source and destination | |
2234 | bits to only CTRL module of the serial registers. Peripheral registers | |
2235 | yet to be defined. */ | |
2236 | ||
2237 | if (i.bit_operands == 1 && i.operands == 2) | |
2238 | { | |
2239 | int bitnum = (i.types[0] == BIT) ? 0 : 1; | |
2240 | ||
2241 | if (strcmp (i.maxq20_op[bitnum].r_bit->reg->reg_name, "ACC")) | |
2242 | { | |
2243 | if (i.maxq20_op[bitnum].r_bit->reg->Mod_name >= 0x7 && | |
2244 | i.maxq20_op[bitnum].r_bit->reg->Mod_name != CTRL) | |
2245 | { | |
2246 | as_bad (_ | |
2247 | ("Only Module 8 system registers allowed in this operation")); | |
2248 | return 0; | |
2249 | } | |
2250 | } | |
2251 | } | |
2252 | ||
2253 | /* This filter is for checking the register bits. */ | |
2254 | if (i.bit_operands == 1 || i.operands == 2) | |
2255 | { | |
2256 | int bitnum = 0, size = 0; | |
2257 | ||
2258 | bitnum = (i.types[0] == BIT) ? 0 : 1; | |
2259 | if (i.bit_operands == 1) | |
2260 | { | |
2261 | switch (i.maxq20_op[bitnum].r_bit->reg->rtype) | |
2262 | { | |
2263 | case Reg_8W: | |
2264 | size = 7; /* 8 bit register, both read and write. */ | |
2265 | break; | |
2266 | case Reg_16W: | |
2267 | size = 15; | |
2268 | break; | |
2269 | case Reg_8R: | |
2270 | size = 7; | |
2271 | if (bitnum == 0) | |
2272 | { | |
2273 | as_fatal (_("Read only Register used as destination")); | |
2274 | return 0; | |
2275 | } | |
2276 | break; | |
2277 | ||
2278 | case Reg_16R: | |
2279 | size = 15; | |
2280 | if (bitnum == 0) | |
2281 | { | |
2282 | as_fatal (_("Read only Register used as destination")); | |
2283 | return 0; | |
2284 | } | |
2285 | break; | |
2286 | } | |
2287 | ||
2288 | if (size < (i.maxq20_op[bitnum].r_bit)->bit) | |
2289 | { | |
2290 | as_bad (_("Bit No '%d'exceeds register size in this operation"), | |
2291 | (i.maxq20_op[bitnum].r_bit)->bit); | |
2292 | return 0; | |
2293 | } | |
2294 | } | |
2295 | ||
2296 | if (i.bit_operands == 2) | |
2297 | { | |
2298 | switch ((i.maxq20_op[0].r_bit)->reg->rtype) | |
2299 | { | |
2300 | case Reg_8W: | |
2301 | size = 7; /* 8 bit register, both read and write. */ | |
2302 | break; | |
2303 | case Reg_16W: | |
2304 | size = 15; | |
2305 | break; | |
2306 | case Reg_8R: | |
2307 | case Reg_16R: | |
2308 | as_fatal (_("Read only Register used as destination")); | |
2309 | return 0; | |
2310 | } | |
2311 | ||
2312 | if (size < (i.maxq20_op[0].r_bit)->bit) | |
2313 | { | |
2314 | as_bad (_ | |
2315 | ("Bit No '%d' exceeds register size in this operation"), | |
2316 | (i.maxq20_op[0].r_bit)->bit); | |
2317 | return 0; | |
2318 | } | |
2319 | ||
2320 | size = 0; | |
2321 | switch ((i.maxq20_op[1].r_bit)->reg->rtype) | |
2322 | { | |
2323 | case Reg_8R: | |
2324 | case Reg_8W: | |
2325 | size = 7; /* 8 bit register, both read and write. */ | |
2326 | break; | |
2327 | case Reg_16R: | |
2328 | case Reg_16W: | |
2329 | size = 15; | |
2330 | break; | |
2331 | } | |
2332 | ||
2333 | if (size < (i.maxq20_op[1].r_bit)->bit) | |
2334 | { | |
2335 | as_bad (_ | |
2336 | ("Bit No '%d' exceeds register size in this operation"), | |
2337 | (i.maxq20_op[1].r_bit)->bit); | |
2338 | return 0; | |
2339 | } | |
2340 | } | |
2341 | } | |
2342 | ||
2343 | /* No branch operations should occur into the data memory. Hence any memory | |
2344 | references have to be filtered out when used with instructions like | |
2345 | jump, djnz[] and call. */ | |
2346 | ||
2347 | if (!strcmp (i.op.name, "JUMP") || !strcmp (i.op.name, "CALL") | |
2348 | || !strncmp (i.op.name, "DJNZ", 4)) | |
2349 | { | |
2350 | if (i.mem_operands) | |
2351 | as_warn (_ | |
2352 | ("Memory References cannot be used with branching operations\n")); | |
2353 | } | |
2354 | ||
2355 | if (!strcmp (i.op.name, "DJNZ")) | |
2356 | { | |
2357 | if (! | |
2358 | (strcmp (i.maxq20_op[0].reg->reg_name, "LC[0]") | |
2359 | || strcmp (i.maxq20_op[0].reg->reg_name, "LC[1]"))) | |
2360 | { | |
2361 | as_bad (_("DJNZ uses only LC[n] register \n")); | |
2362 | return 0; | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | /* No destination register used should be read only! */ | |
2367 | if ((i.operands == 2 && i.types[0] == REG) || !strcmp (i.op.name, "POP") | |
2368 | || !strcmp (i.op.name, "POPI")) | |
2369 | { /* The destination is a register */ | |
2370 | int regnum = 0; | |
2371 | ||
2372 | if (!strcmp (i.op.name, "POP") || !strcmp (i.op.name, "POPI")) | |
2373 | { | |
2374 | regnum = 0; | |
2375 | ||
2376 | if (i.types[regnum] == MEM) | |
2377 | { | |
2378 | mem_access_syntax *mem_op = NULL; | |
2379 | ||
2380 | mem_op = | |
2381 | (mem_access_syntax *) hash_find (mem_syntax_hash, | |
2382 | i.maxq20_op[regnum].mem-> | |
2383 | name); | |
2384 | if (mem_op->type == SRC && mem_op) | |
2385 | { | |
2386 | as_bad (_ | |
2387 | ("'%s' operand cant be used as destination in %s"), | |
2388 | mem_op->name, i.op.name); | |
2389 | return 0; | |
2390 | } | |
2391 | } | |
2392 | } | |
2393 | ||
2394 | if (i.maxq20_op[regnum].reg->rtype == Reg_8R | |
2395 | || i.maxq20_op[regnum].reg->rtype == Reg_16R) | |
2396 | { | |
2397 | as_bad (_("Read only register used for writing purposes '%s'"), | |
2398 | i.maxq20_op[regnum].reg->reg_name); | |
2399 | return 0; | |
2400 | } | |
2401 | } | |
2402 | ||
2403 | /* While moving the address of a data in the data section, the destination | |
2404 | should be either data pointers only. */ | |
2405 | if ((i.data_operands) && (i.operands == 2)) | |
2406 | { | |
2407 | if ((i.types[0] != REG) && (i.types[0] != MEM)) | |
2408 | { | |
2409 | as_bad (_("Invalid destination for this kind of source.")); | |
2410 | return 0; | |
2411 | } | |
2412 | ||
2413 | if (i.types[0] == REG && i.maxq20_op[0].reg->rtype == Reg_8W) | |
2414 | { | |
2415 | as_bad (_ | |
2416 | ("Invalid register as destination for this kind of source.Only data pointers can be used.")); | |
2417 | return 0; | |
2418 | } | |
2419 | } | |
2420 | return 1; | |
2421 | } | |
2422 | ||
2423 | static int | |
2424 | decode_insn (void) | |
2425 | { | |
2426 | /* Check for the format Bit if defined. */ | |
2427 | if (i.op.format == 0 || i.op.format == 1) | |
2428 | i.instr[0] = i.op.format << 7; | |
2429 | else | |
2430 | { | |
2431 | /* Format bit not defined. We will have to be find it out ourselves. */ | |
2432 | if (i.imm_operands == 1 || i.data_operands == 1 || i.disp_operands == 1) | |
2433 | i.op.format = 0; | |
2434 | else | |
2435 | i.op.format = 1; | |
2436 | i.instr[0] = i.op.format << 7; | |
2437 | } | |
2438 | ||
2439 | /* Now for the destination register. */ | |
2440 | ||
2441 | /* If destination register is already defined . The conditions are the | |
2442 | following: (1) The second entry in the destination array should be 0 (2) | |
2443 | If there are two operands then the first entry should not be a register, | |
2444 | memory or a register bit (3) If there are less than two operands and the | |
2445 | it is not a pop operation (4) The second argument is the carry | |
2446 | flag(applicable to move Acc.<b>,C. */ | |
2447 | if (i.op.dst[1] == 0 | |
2448 | && | |
2449 | ((i.types[0] != REG && i.types[0] != MEM && i.types[0] != BIT | |
2450 | && i.operands == 2) || (i.operands < 2 && strcmp (i.op.name, "POP") | |
2451 | && strcmp (i.op.name, "POPI")) | |
2452 | || (i.op.arg[1] == FLAG_C))) | |
2453 | { | |
2454 | i.op.dst[0] &= 0x7f; | |
2455 | i.instr[0] |= i.op.dst[0]; | |
2456 | } | |
2457 | else if (i.op.dst[1] == 0 && !strcmp (i.op.name, "DJNZ") | |
2458 | && | |
2459 | (((i.types[0] == REG) | |
2460 | && (!strcmp (i.maxq20_op[0].reg->reg_name, "LC[0]") | |
2461 | || !strcmp (i.maxq20_op[0].reg->reg_name, "LC[1]"))))) | |
2462 | { | |
2463 | i.op.dst[0] &= 0x7f; | |
2464 | if (!strcmp (i.maxq20_op[0].reg->reg_name, "LC[0]")) | |
2465 | i.instr[0] |= 0x4D; | |
2466 | ||
2467 | if (!strcmp (i.maxq20_op[0].reg->reg_name, "LC[1]")) | |
2468 | i.instr[0] |= 0x5D; | |
2469 | } | |
2470 | else | |
2471 | { | |
2472 | unsigned char temp; | |
2473 | ||
2474 | /* Target register will have to be specified. */ | |
2475 | if (i.types[0] == REG | |
2476 | && (i.op.dst[0] == REG || i.op.dst[0] == (REG | MEM))) | |
2477 | { | |
2478 | temp = (i.maxq20_op[0].reg)->opcode; | |
2479 | temp &= 0x7f; | |
2480 | i.instr[0] |= temp; | |
2481 | } | |
2482 | else if (i.types[0] == MEM && (i.op.dst[0] == (REG | MEM))) | |
2483 | { | |
2484 | temp = (i.maxq20_op[0].mem)->opcode; | |
2485 | temp &= 0x7f; | |
2486 | i.instr[0] |= temp; | |
2487 | } | |
2488 | else if (i.types[0] == BIT && (i.op.dst[0] == REG)) | |
2489 | { | |
2490 | temp = (i.maxq20_op[0].r_bit)->reg->opcode; | |
2491 | temp &= 0x7f; | |
2492 | i.instr[0] |= temp; | |
2493 | } | |
2494 | else if (i.types[1] == BIT && (i.op.dst[0] == BIT)) | |
2495 | { | |
2496 | temp = (i.maxq20_op[1].r_bit)->bit; | |
2497 | temp = temp << 4; | |
2498 | temp |= i.op.dst[1]; | |
2499 | temp &= 0x7f; | |
2500 | i.instr[0] |= temp; | |
2501 | } | |
2502 | else | |
2503 | { | |
2504 | as_bad (_("Invalid Instruction")); | |
2505 | return 0; | |
2506 | } | |
2507 | } | |
2508 | ||
2509 | /* Now for the source register. */ | |
2510 | ||
2511 | /* If Source register is already known. The following conditions are | |
2512 | checked: (1) There are no operands (2) If there is only one operand and | |
2513 | it is a flag (3) If the operation is MOVE C,#0/#1 (4) If it is a POP | |
2514 | operation. */ | |
2515 | ||
2516 | if (i.operands == 0 || (i.operands == 1 && i.types[0] == FLAG) | |
2517 | || (i.types[0] == FLAG && i.types[1] == IMMBIT) | |
2518 | || !strcmp (i.op.name, "POP") || !strcmp (i.op.name, "POPI")) | |
2519 | i.instr[1] = i.op.src[0]; | |
2520 | ||
2521 | else if (i.imm_operands == 1 && ((i.op.src[0] & IMM) == IMM)) | |
2522 | i.instr[1] = i.maxq20_op[this_operand].imms; | |
2523 | ||
2524 | else if (i.types[this_operand] == REG && ((i.op.src[0] & REG) == REG)) | |
2525 | i.instr[1] = (char) ((i.maxq20_op[this_operand].reg)->opcode); | |
2526 | ||
2527 | else if (i.types[this_operand] == BIT && ((i.op.src[0] & REG) == REG)) | |
2528 | i.instr[1] = (char) (i.maxq20_op[this_operand].r_bit->reg->opcode); | |
2529 | ||
2530 | else if (i.types[this_operand] == MEM && ((i.op.src[0] & MEM) == MEM)) | |
2531 | i.instr[1] = (char) ((i.maxq20_op[this_operand].mem)->opcode); | |
2532 | ||
2533 | else if (i.types[this_operand] == DATA && ((i.op.src[0] & DATA) == DATA)) | |
2534 | /* This will copy only the lower order bytes into the instruction. The | |
2535 | higher order bytes have already been copied into the prefix register. */ | |
2536 | i.instr[1] = 0; | |
2537 | ||
2538 | /* Decoding the source in the case when the second array entry is not 0. | |
2539 | This means that the source register has been divided into two nibbles. */ | |
2540 | ||
2541 | else if (i.op.src[1] != 0) | |
2542 | { | |
2543 | /* If the first operand is a accumulator bit then | |
2544 | the first 4 bits will be filled with the bit number. */ | |
2545 | if (i.types[0] == BIT && ((i.op.src[0] & BIT) == BIT)) | |
2546 | { | |
2547 | unsigned char temp = (i.maxq20_op[0].r_bit)->bit; | |
2548 | ||
2549 | temp = temp << 4; | |
2550 | temp |= i.op.src[1]; | |
2551 | i.instr[1] = temp; | |
2552 | } | |
2553 | /* In case of MOVE dst.<b>,#1 The first nibble in the source register | |
2554 | has to start with a zero. This is called a ZEROBIT */ | |
2555 | else if (i.types[0] == BIT && ((i.op.src[0] & ZEROBIT) == ZEROBIT)) | |
2556 | { | |
2557 | char temp = (i.maxq20_op[0].r_bit)->bit; | |
2558 | ||
2559 | temp = temp << 4; | |
2560 | temp |= i.op.src[1]; | |
2561 | temp &= 0x7f; | |
2562 | i.instr[1] = temp; | |
2563 | } | |
2564 | /* Similarly for a ONEBIT */ | |
2565 | else if (i.types[0] == BIT && ((i.op.src[0] & ONEBIT) == ONEBIT)) | |
2566 | { | |
2567 | char temp = (i.maxq20_op[0].r_bit)->bit; | |
2568 | ||
2569 | temp = temp << 4; | |
2570 | temp |= i.op.src[1]; | |
2571 | temp |= 0x80; | |
2572 | i.instr[1] = temp; | |
2573 | } | |
2574 | /* In case the second operand is a register bit (MOVE C,Acc.<b> or MOVE | |
2575 | C,src.<b> */ | |
2576 | else if (i.types[1] == BIT) | |
2577 | { | |
2578 | if (i.op.src[1] == 0 && i.op.src[1] == REG) | |
2579 | i.instr[1] = (i.maxq20_op[1].r_bit)->reg->opcode; | |
2580 | ||
2581 | else if (i.op.src[0] == BIT && i.op.src) | |
2582 | { | |
2583 | char temp = (i.maxq20_op[1].r_bit)->bit; | |
2584 | ||
2585 | temp = temp << 4; | |
2586 | temp |= i.op.src[1]; | |
2587 | i.instr[1] = temp; | |
2588 | } | |
2589 | } | |
2590 | else | |
2591 | { | |
2592 | as_bad (_("Invalid Instruction")); | |
2593 | return 0; | |
2594 | } | |
2595 | } | |
2596 | return 1; | |
2597 | } | |
2598 | ||
2599 | /* This is a function for outputting displacement operands. */ | |
2600 | ||
2601 | static void | |
2602 | output_disp (fragS *insn_start_frag, offsetT insn_start_off) | |
2603 | { | |
2604 | char *p; | |
2605 | relax_substateT subtype; | |
2606 | symbolS *sym; | |
2607 | offsetT off; | |
2608 | int diff; | |
2609 | ||
2610 | diff = 0; | |
2611 | insn_start_frag = frag_now; | |
2612 | insn_start_off = frag_now_fix (); | |
2613 | ||
2614 | switch (i.Instr_Prefix) | |
2615 | { | |
2616 | case LONG_PREFIX: | |
2617 | subtype = EXPLICT_LONG_PREFIX; | |
2618 | break; | |
2619 | case SHORT_PREFIX: | |
2620 | subtype = SHORT_PREFIX; | |
2621 | break; | |
2622 | default: | |
2623 | subtype = NO_PREFIX; | |
2624 | break; | |
2625 | } | |
2626 | ||
2627 | /* Its a symbol. Here we end the frag and start the relaxation. Now in our | |
2628 | case there is no need for relaxation. But we do need support for a | |
2629 | prefix operator. Hence we will check whethere is room for 4 bytes ( 2 | |
2630 | for prefix + 2 for the current instruction ) Hence if at a particular | |
2631 | time we find out whether the prefix operator is reqd , we shift the | |
2632 | current instruction two places ahead and insert the prefix instruction. */ | |
2633 | frag_grow (2 + 2); | |
2634 | p = frag_more (2); | |
2635 | ||
2636 | sym = i.maxq20_op[this_operand].disps->X_add_symbol; | |
2637 | off = i.maxq20_op[this_operand].disps->X_add_number; | |
2638 | ||
2639 | if (i.maxq20_op[this_operand].disps->X_add_symbol != NULL && sym && frag_now | |
2640 | && (subtype != EXPLICT_LONG_PREFIX)) | |
2641 | { | |
2642 | /* If in the same frag. */ | |
2643 | if (frag_now == symbol_get_frag (sym)) | |
2644 | { | |
2645 | diff = | |
2646 | ((((expressionS *) symbol_get_value_expression (sym))-> | |
2647 | X_add_number) - insn_start_off); | |
2648 | ||
9f5083a4 NC |
2649 | /* PC points to the next instruction. */ |
2650 | diff = (diff / MAXQ_OCTETS_PER_BYTE) - 1; | |
7499d566 NC |
2651 | |
2652 | if (diff >= -128 && diff <= 127) | |
2653 | { | |
2654 | i.instr[1] = (char) diff; | |
2655 | ||
2656 | /* This will be overwritten later when the symbol is resolved. */ | |
2657 | *p = i.instr[1]; | |
2658 | *(p + 1) = i.instr[0]; | |
2659 | ||
2660 | /* No Need to create a FIXUP. */ | |
2661 | return; | |
2662 | } | |
2663 | } | |
2664 | } | |
2665 | ||
2666 | /* This will be overwritten later when the symbol is resolved. */ | |
2667 | *p = i.instr[1]; | |
2668 | *(p + 1) = i.instr[0]; | |
2669 | ||
2670 | if (i.maxq20_op[this_operand].disps->X_op != O_constant | |
2671 | && i.maxq20_op[this_operand].disps->X_op != O_symbol) | |
2672 | { | |
2673 | /* Handle complex expressions. */ | |
2674 | sym = make_expr_symbol (i.maxq20_op[this_operand].disps); | |
2675 | off = 0; | |
2676 | } | |
2677 | ||
2678 | /* Vineet : This has been added for md_estimate_size_before_relax to | |
2679 | estimate the correct size. */ | |
2680 | if (subtype != SHORT_PREFIX) | |
2681 | i.reloc[this_operand] = LONG_PREFIX; | |
2682 | ||
2683 | frag_var (rs_machine_dependent, 2, i.reloc[this_operand], subtype, sym, off, p); | |
2684 | } | |
2685 | ||
2686 | /* This is a function for outputting displacement operands. */ | |
2687 | ||
2688 | static void | |
2689 | output_data (fragS *insn_start_frag, offsetT insn_start_off) | |
2690 | { | |
2691 | char *p; | |
2692 | relax_substateT subtype; | |
2693 | symbolS *sym; | |
2694 | offsetT off; | |
2695 | int diff; | |
2696 | ||
2697 | diff = 0; | |
2698 | off = 0; | |
2699 | insn_start_frag = frag_now; | |
2700 | insn_start_off = frag_now_fix (); | |
2701 | ||
2702 | subtype = EXPLICT_LONG_PREFIX; | |
2703 | ||
2704 | frag_grow (2 + 2); | |
2705 | p = frag_more (2); | |
2706 | ||
2707 | sym = i.maxq20_op[this_operand].data; | |
2708 | off = 0; | |
2709 | ||
2710 | /* This will be overwritten later when the symbol is resolved. */ | |
2711 | *p = i.instr[1]; | |
2712 | *(p + 1) = i.instr[0]; | |
2713 | ||
2714 | if (i.maxq20_op[this_operand].disps->X_op != O_constant | |
2715 | && i.maxq20_op[this_operand].disps->X_op != O_symbol) | |
2716 | /* Handle complex expressions. */ | |
2717 | /* Because data is already in terms of symbol so no | |
2718 | need to convert it from expression to symbol. */ | |
2719 | off = 0; | |
2720 | ||
2721 | frag_var (rs_machine_dependent, 2, i.reloc[this_operand], subtype, sym, off, p); | |
2722 | } | |
2723 | ||
2724 | static void | |
2725 | output_insn (void) | |
2726 | { | |
2727 | fragS *insn_start_frag; | |
2728 | offsetT insn_start_off; | |
2729 | char *p; | |
2730 | ||
2731 | /* Tie dwarf2 debug info to the address at the start of the insn. We can't | |
2732 | do this after the insn has been output as the current frag may have been | |
2733 | closed off. eg. by frag_var. */ | |
2734 | dwarf2_emit_insn (0); | |
2735 | ||
2736 | /* To ALign the text section on word. */ | |
2737 | ||
2738 | frag_align (1, 0, 1); | |
2739 | ||
2740 | /* We initialise the frags for this particular instruction. */ | |
2741 | insn_start_frag = frag_now; | |
2742 | insn_start_off = frag_now_fix (); | |
2743 | ||
2744 | /* If there are displacement operators(unresolved) present, then handle | |
2745 | them separately. */ | |
2746 | if (i.disp_operands) | |
2747 | { | |
2748 | output_disp (insn_start_frag, insn_start_off); | |
2749 | return; | |
2750 | } | |
2751 | ||
2752 | if (i.data_operands) | |
2753 | { | |
2754 | output_data (insn_start_frag, insn_start_off); | |
2755 | return; | |
2756 | } | |
2757 | ||
2758 | /* Check whether the INSERT_BUFFER has to be written. */ | |
2759 | if (strcmp (INSERT_BUFFER, "")) | |
2760 | { | |
2761 | p = frag_more (2); | |
2762 | ||
2763 | *p++ = INSERT_BUFFER[1]; | |
2764 | *p = INSERT_BUFFER[0]; | |
2765 | } | |
2766 | ||
2767 | /* Check whether the prefix instruction has to be written. */ | |
2768 | if (strcmp (PFX_INSN, "")) | |
2769 | { | |
2770 | p = frag_more (2); | |
2771 | ||
2772 | *p++ = PFX_INSN[1]; | |
2773 | *p = PFX_INSN[0]; | |
2774 | } | |
2775 | ||
2776 | p = frag_more (2); | |
2777 | /* For Little endian. */ | |
2778 | *p++ = i.instr[1]; | |
2779 | *p = i.instr[0]; | |
2780 | } | |
2781 | ||
2782 | static void | |
2783 | make_new_reg_table (void) | |
2784 | { | |
2785 | unsigned long size_pm = sizeof (peripheral_reg_table); | |
2786 | num_of_reg = ARRAY_SIZE (peripheral_reg_table); | |
2787 | ||
2788 | new_reg_table = xmalloc (size_pm); | |
2789 | if (new_reg_table == NULL) | |
2790 | as_bad (_("Cannot allocate memory")); | |
2791 | ||
2792 | memcpy (new_reg_table, peripheral_reg_table, size_pm); | |
2793 | } | |
2794 | ||
2795 | /* pmmain performs the initilizations for the pheripheral modules. */ | |
2796 | ||
2797 | static void | |
2798 | pmmain (void) | |
2799 | { | |
2800 | make_new_reg_table (); | |
2801 | return; | |
2802 | } | |
2803 | ||
2804 | void | |
2805 | md_begin (void) | |
2806 | { | |
2807 | const char *hash_err = NULL; | |
2808 | int c = 0; | |
2809 | char *p; | |
2810 | const MAXQ20_OPCODE_INFO *optab; | |
2811 | MAXQ20_OPCODES *core_optab; /* For opcodes of the same name. This will | |
2812 | be inserted into the hash table. */ | |
2813 | struct reg *reg_tab; | |
2814 | struct mem_access_syntax const *memsyntab; | |
2815 | struct mem_access *memtab; | |
2816 | struct bit_name *bittab; | |
2817 | ||
2818 | /* Initilize pherioipheral modules. */ | |
2819 | pmmain (); | |
2820 | ||
2821 | /* Initialise the opcode hash table. */ | |
2822 | op_hash = hash_new (); | |
2823 | ||
2824 | optab = op_table; /* Initialise it to the first entry of the | |
2825 | maxq20 operand table. */ | |
2826 | ||
2827 | /* Setup for loop. */ | |
2828 | core_optab = xmalloc (sizeof (MAXQ20_OPCODES)); | |
2829 | core_optab->start = optab; | |
2830 | ||
2831 | while (1) | |
2832 | { | |
2833 | ++optab; | |
2834 | if (optab->name == NULL || strcmp (optab->name, (optab - 1)->name) != 0) | |
2835 | { | |
2836 | /* different name --> ship out current template list; add to hash | |
2837 | table; & begin anew. */ | |
2838 | ||
2839 | core_optab->end = optab; | |
2840 | #ifdef MAXQ10S | |
5c4504f7 | 2841 | if (max_version == bfd_mach_maxq10) |
7499d566 NC |
2842 | { |
2843 | if (((optab - 1)->arch == MAXQ10) || ((optab - 1)->arch == MAX)) | |
2844 | { | |
2845 | hash_err = hash_insert (op_hash, | |
2846 | (optab - 1)->name, | |
5a49b8ac | 2847 | (void *) core_optab); |
7499d566 NC |
2848 | } |
2849 | } | |
5c4504f7 | 2850 | else if (max_version == bfd_mach_maxq20) |
7499d566 | 2851 | { |
7499d566 NC |
2852 | if (((optab - 1)->arch == MAXQ20) || ((optab - 1)->arch == MAX)) |
2853 | { | |
2854 | #endif | |
2855 | hash_err = hash_insert (op_hash, | |
2856 | (optab - 1)->name, | |
5a49b8ac | 2857 | (void *) core_optab); |
7499d566 NC |
2858 | #if MAXQ10S |
2859 | } | |
2860 | } | |
2861 | else | |
2862 | as_fatal (_("Internal Error: Illegal Architecure specified")); | |
2863 | #endif | |
2864 | if (hash_err) | |
2865 | as_fatal (_("Internal Error: Can't hash %s: %s"), | |
2866 | (optab - 1)->name, hash_err); | |
2867 | ||
2868 | if (optab->name == NULL) | |
2869 | break; | |
2870 | core_optab = xmalloc (sizeof (MAXQ20_OPCODES)); | |
2871 | core_optab->start = optab; | |
2872 | } | |
2873 | } | |
2874 | ||
2875 | /* Initialise a new register table. */ | |
2876 | reg_hash = hash_new (); | |
2877 | ||
2878 | for (reg_tab = system_reg_table; | |
2879 | reg_tab < (system_reg_table + ARRAY_SIZE (system_reg_table)); | |
2880 | reg_tab++) | |
2881 | { | |
2882 | #if MAXQ10S | |
2883 | switch (max_version) | |
2884 | { | |
5c4504f7 | 2885 | case bfd_mach_maxq10: |
7499d566 | 2886 | if ((reg_tab->arch == MAXQ10) || (reg_tab->arch == MAX)) |
5a49b8ac | 2887 | hash_err = hash_insert (reg_hash, reg_tab->reg_name, (void *) reg_tab); |
7499d566 NC |
2888 | break; |
2889 | ||
5c4504f7 | 2890 | case bfd_mach_maxq20: |
7499d566 NC |
2891 | if ((reg_tab->arch == MAXQ20) || (reg_tab->arch == MAX)) |
2892 | { | |
2893 | #endif | |
2894 | hash_err = | |
5a49b8ac | 2895 | hash_insert (reg_hash, reg_tab->reg_name, (void *) reg_tab); |
7499d566 NC |
2896 | #if MAXQ10S |
2897 | } | |
2898 | break; | |
2899 | default: | |
2900 | as_fatal (_("Invalid architecture type")); | |
2901 | } | |
2902 | #endif | |
2903 | ||
2904 | if (hash_err) | |
2905 | as_fatal (_("Internal Error : Can't Hash %s : %s"), | |
2906 | reg_tab->reg_name, hash_err); | |
2907 | } | |
2908 | ||
2909 | /* Pheripheral Registers Entry. */ | |
2910 | for (reg_tab = new_reg_table; | |
2911 | reg_tab < (new_reg_table + num_of_reg - 1); reg_tab++) | |
2912 | { | |
5a49b8ac | 2913 | hash_err = hash_insert (reg_hash, reg_tab->reg_name, (void *) reg_tab); |
7499d566 NC |
2914 | |
2915 | if (hash_err) | |
2916 | as_fatal (_("Internal Error : Can't Hash %s : %s"), | |
2917 | reg_tab->reg_name, hash_err); | |
2918 | } | |
2919 | ||
2920 | /* Initialise a new memory operand table. */ | |
2921 | mem_hash = hash_new (); | |
2922 | ||
2923 | for (memtab = mem_table; | |
2924 | memtab < mem_table + ARRAY_SIZE (mem_table); | |
2925 | memtab++) | |
2926 | { | |
5a49b8ac | 2927 | hash_err = hash_insert (mem_hash, memtab->name, (void *) memtab); |
7499d566 NC |
2928 | if (hash_err) |
2929 | as_fatal (_("Internal Error : Can't Hash %s : %s"), | |
2930 | memtab->name, hash_err); | |
2931 | } | |
2932 | ||
2933 | bit_hash = hash_new (); | |
2934 | ||
2935 | for (bittab = bit_table; | |
2936 | bittab < bit_table + ARRAY_SIZE (bit_table); | |
2937 | bittab++) | |
2938 | { | |
5a49b8ac | 2939 | hash_err = hash_insert (bit_hash, bittab->name, (void *) bittab); |
7499d566 NC |
2940 | if (hash_err) |
2941 | as_fatal (_("Internal Error : Can't Hash %s : %s"), | |
2942 | bittab->name, hash_err); | |
2943 | } | |
2944 | ||
2945 | mem_syntax_hash = hash_new (); | |
2946 | ||
2947 | for (memsyntab = mem_access_syntax_table; | |
2948 | memsyntab < mem_access_syntax_table + ARRAY_SIZE (mem_access_syntax_table); | |
2949 | memsyntab++) | |
2950 | { | |
2951 | hash_err = | |
5a49b8ac | 2952 | hash_insert (mem_syntax_hash, memsyntab->name, (void *) memsyntab); |
7499d566 NC |
2953 | if (hash_err) |
2954 | as_fatal (_("Internal Error : Can't Hash %s : %s"), | |
2955 | memsyntab->name, hash_err); | |
2956 | } | |
2957 | ||
2958 | /* Initialise the lexical tables,mnemonic chars,operand chars. */ | |
2959 | for (c = 0; c < 256; c++) | |
2960 | { | |
2961 | if (ISDIGIT (c)) | |
2962 | { | |
2963 | digit_chars[c] = c; | |
2964 | mnemonic_chars[c] = c; | |
2965 | operand_chars[c] = c; | |
2966 | register_chars[c] = c; | |
2967 | } | |
2968 | else if (ISLOWER (c)) | |
2969 | { | |
2970 | mnemonic_chars[c] = c; | |
2971 | operand_chars[c] = c; | |
2972 | register_chars[c] = c; | |
2973 | } | |
2974 | else if (ISUPPER (c)) | |
2975 | { | |
2976 | mnemonic_chars[c] = TOLOWER (c); | |
2977 | register_chars[c] = c; | |
2978 | operand_chars[c] = c; | |
2979 | } | |
2980 | ||
2981 | if (ISALPHA (c) || ISDIGIT (c)) | |
2982 | { | |
2983 | identifier_chars[c] = c; | |
2984 | } | |
2985 | else if (c > 128) | |
2986 | { | |
2987 | identifier_chars[c] = c; | |
2988 | operand_chars[c] = c; | |
2989 | } | |
2990 | } | |
2991 | ||
2992 | /* All the special characters. */ | |
2993 | register_chars['@'] = '@'; | |
2994 | register_chars['+'] = '+'; | |
2995 | register_chars['-'] = '-'; | |
2996 | digit_chars['-'] = '-'; | |
2997 | identifier_chars['_'] = '_'; | |
2998 | identifier_chars['.'] = '.'; | |
2999 | register_chars['['] = '['; | |
3000 | register_chars[']'] = ']'; | |
3001 | operand_chars['_'] = '_'; | |
3002 | operand_chars['#'] = '#'; | |
3003 | mnemonic_chars['['] = '['; | |
3004 | mnemonic_chars[']'] = ']'; | |
3005 | ||
3006 | for (p = operand_special_chars; *p != '\0'; p++) | |
3007 | operand_chars[(unsigned char) *p] = (unsigned char) *p; | |
5c4504f7 NC |
3008 | |
3009 | /* Set the maxq arch type. */ | |
3010 | maxq_target (max_version); | |
7499d566 NC |
3011 | } |
3012 | ||
3013 | /* md_assemble - Parse Instr - Seprate menmonics and operands - lookup the | |
3014 | menmunonic in the operand table - Parse operands and populate the | |
3015 | structure/template - Match the operand with opcode and its validity - | |
3016 | Output Instr. */ | |
3017 | ||
3018 | void | |
3019 | md_assemble (char *line) | |
3020 | { | |
3021 | int j; | |
3022 | ||
3023 | char mnemonic[MAX_MNEM_SIZE]; | |
3024 | char temp4prev[256]; | |
3025 | static char prev_insn[256]; | |
3026 | ||
3027 | /* Initialize globals. */ | |
3028 | memset (&i, '\0', sizeof (i)); | |
3029 | for (j = 0; j < MAX_OPERANDS; j++) | |
3030 | i.reloc[j] = NO_RELOC; | |
3031 | ||
3032 | i.prefix = -1; | |
3033 | PFX_INSN[0] = 0; | |
3034 | PFX_INSN[1] = 0; | |
3035 | INSERT_BUFFER[0] = 0; | |
3036 | INSERT_BUFFER[1] = 0; | |
3037 | ||
3038 | memcpy (temp4prev, line, strlen (line) + 1); | |
3039 | ||
3040 | save_stack_p = save_stack; | |
3041 | ||
3042 | line = (char *) parse_insn (line, mnemonic); | |
3043 | if (line == NULL) | |
3044 | return; | |
3045 | ||
3046 | line = (char *) parse_operands (line, mnemonic); | |
3047 | if (line == NULL) | |
3048 | return; | |
3049 | ||
3050 | /* Next, we find a template that matches the given insn, making sure the | |
3051 | overlap of the given operands types is consistent with the template | |
3052 | operand types. */ | |
3053 | if (!match_template ()) | |
3054 | return; | |
3055 | ||
3056 | /* In the MAXQ20, there are certain register combinations, and other | |
3057 | restrictions which are not allowed. We will try to resolve these right | |
3058 | now. */ | |
3059 | if (!match_filters ()) | |
3060 | return; | |
3061 | ||
708587a4 | 3062 | /* Check for the appropriate PFX register. */ |
7499d566 NC |
3063 | set_prefix (); |
3064 | pfx_for_imm_val (0); | |
3065 | ||
3066 | if (!decode_insn ()) /* decode insn. */ | |
3067 | need_pass_2 = 1; | |
3068 | ||
3069 | /* Check for Exlipct PFX instruction. */ | |
3070 | if (PFX_INSN[0] && (strstr (prev_insn, "PFX") || strstr (prev_insn, "pfx"))) | |
3071 | as_warn (_("Ineffective insntruction %s \n"), prev_insn); | |
3072 | ||
3073 | memcpy (prev_insn, temp4prev, strlen (temp4prev) + 1); | |
3074 | ||
3075 | /* We are ready to output the insn. */ | |
3076 | output_insn (); | |
3077 | } |