1 /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
2 /* Instruction building/extraction support for ip2k. -*- C -*-
3
4 THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
5 - the resultant file is machine generated, cgen-ibld.in isn't
6
7 Copyright (C) 1996-2021 Free Software Foundation, Inc.
8
9 This file is part of libopcodes.
10
11 This library is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3, or (at your option)
14 any later version.
15
16 It is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation, Inc.,
23 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
24
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
26 Keep that in mind. */
27
28 #include "sysdep.h"
29 #include <stdio.h>
30 #include "ansidecl.h"
31 #include "dis-asm.h"
32 #include "bfd.h"
33 #include "symcat.h"
34 #include "ip2k-desc.h"
35 #include "ip2k-opc.h"
36 #include "cgen/basic-modes.h"
37 #include "opintl.h"
38 #include "safe-ctype.h"
39
40 #undef min
41 #define min(a,b) ((a) < (b) ? (a) : (b))
42 #undef max
43 #define max(a,b) ((a) > (b) ? (a) : (b))
44
45 /* Used by the ifield rtx function. */
46 #define FLD(f) (fields->f)
47
48 static const char * insert_normal
49 (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
50 unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
51 static const char * insert_insn_normal
52 (CGEN_CPU_DESC, const CGEN_INSN *,
53 CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
54 static int extract_normal
55 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
56 unsigned int, unsigned int, unsigned int, unsigned int,
57 unsigned int, unsigned int, bfd_vma, long *);
58 static int extract_insn_normal
59 (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
60 CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
61 #if CGEN_INT_INSN_P
62 static void put_insn_int_value
63 (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
64 #endif
65 #if ! CGEN_INT_INSN_P
66 static CGEN_INLINE void insert_1
67 (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
68 static CGEN_INLINE int fill_cache
69 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, bfd_vma);
70 static CGEN_INLINE long extract_1
71 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
72 #endif
73
74 /* Operand insertion. */
75
76 #if ! CGEN_INT_INSN_P
77
78 /* Subroutine of insert_normal. */
79
80 static CGEN_INLINE void
insert_1(CGEN_CPU_DESC cd,unsigned long value,int start,int length,int word_length,unsigned char * bufp)81 insert_1 (CGEN_CPU_DESC cd,
82 unsigned long value,
83 int start,
84 int length,
85 int word_length,
86 unsigned char *bufp)
87 {
88 unsigned long x, mask;
89 int shift;
90
91 x = cgen_get_insn_value (cd, bufp, word_length, cd->endian);
92
93 /* Written this way to avoid undefined behaviour. */
94 mask = (1UL << (length - 1) << 1) - 1;
95 if (CGEN_INSN_LSB0_P)
96 shift = (start + 1) - length;
97 else
98 shift = (word_length - (start + length));
99 x = (x & ~(mask << shift)) | ((value & mask) << shift);
100
101 cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x, cd->endian);
102 }
103
104 #endif /* ! CGEN_INT_INSN_P */
105
106 /* Default insertion routine.
107
108 ATTRS is a mask of the boolean attributes.
109 WORD_OFFSET is the offset in bits from the start of the insn of the value.
110 WORD_LENGTH is the length of the word in bits in which the value resides.
111 START is the starting bit number in the word, architecture origin.
112 LENGTH is the length of VALUE in bits.
113 TOTAL_LENGTH is the total length of the insn in bits.
114
115 The result is an error message or NULL if success. */
116
117 /* ??? This duplicates functionality with bfd's howto table and
118 bfd_install_relocation. */
119 /* ??? This doesn't handle bfd_vma's. Create another function when
120 necessary. */
121
122 static const char *
insert_normal(CGEN_CPU_DESC cd,long value,unsigned int attrs,unsigned int word_offset,unsigned int start,unsigned int length,unsigned int word_length,unsigned int total_length,CGEN_INSN_BYTES_PTR buffer)123 insert_normal (CGEN_CPU_DESC cd,
124 long value,
125 unsigned int attrs,
126 unsigned int word_offset,
127 unsigned int start,
128 unsigned int length,
129 unsigned int word_length,
130 unsigned int total_length,
131 CGEN_INSN_BYTES_PTR buffer)
132 {
133 static char errbuf[100];
134 unsigned long mask;
135
136 /* If LENGTH is zero, this operand doesn't contribute to the value. */
137 if (length == 0)
138 return NULL;
139
140 /* Written this way to avoid undefined behaviour. */
141 mask = (1UL << (length - 1) << 1) - 1;
142
143 if (word_length > 8 * sizeof (CGEN_INSN_INT))
144 abort ();
145
146 /* For architectures with insns smaller than the base-insn-bitsize,
147 word_length may be too big. */
148 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
149 {
150 if (word_offset == 0
151 && word_length > total_length)
152 word_length = total_length;
153 }
154
155 /* Ensure VALUE will fit. */
156 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
157 {
158 long minval = - (1UL << (length - 1));
159 unsigned long maxval = mask;
160
161 if ((value > 0 && (unsigned long) value > maxval)
162 || value < minval)
163 {
164 /* xgettext:c-format */
165 sprintf (errbuf,
166 _("operand out of range (%ld not between %ld and %lu)"),
167 value, minval, maxval);
168 return errbuf;
169 }
170 }
171 else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
172 {
173 unsigned long maxval = mask;
174 unsigned long val = (unsigned long) value;
175
176 /* For hosts with a word size > 32 check to see if value has been sign
177 extended beyond 32 bits. If so then ignore these higher sign bits
178 as the user is attempting to store a 32-bit signed value into an
179 unsigned 32-bit field which is allowed. */
180 if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
181 val &= 0xFFFFFFFF;
182
183 if (val > maxval)
184 {
185 /* xgettext:c-format */
186 sprintf (errbuf,
187 _("operand out of range (0x%lx not between 0 and 0x%lx)"),
188 val, maxval);
189 return errbuf;
190 }
191 }
192 else
193 {
194 if (! cgen_signed_overflow_ok_p (cd))
195 {
196 long minval = - (1UL << (length - 1));
197 long maxval = (1UL << (length - 1)) - 1;
198
199 if (value < minval || value > maxval)
200 {
201 sprintf
202 /* xgettext:c-format */
203 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
204 value, minval, maxval);
205 return errbuf;
206 }
207 }
208 }
209
210 #if CGEN_INT_INSN_P
211
212 {
213 int shift_within_word, shift_to_word, shift;
214
215 /* How to shift the value to BIT0 of the word. */
216 shift_to_word = total_length - (word_offset + word_length);
217
218 /* How to shift the value to the field within the word. */
219 if (CGEN_INSN_LSB0_P)
220 shift_within_word = start + 1 - length;
221 else
222 shift_within_word = word_length - start - length;
223
224 /* The total SHIFT, then mask in the value. */
225 shift = shift_to_word + shift_within_word;
226 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
227 }
228
229 #else /* ! CGEN_INT_INSN_P */
230
231 {
232 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
233
234 insert_1 (cd, value, start, length, word_length, bufp);
235 }
236
237 #endif /* ! CGEN_INT_INSN_P */
238
239 return NULL;
240 }
241
242 /* Default insn builder (insert handler).
243 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
244 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
245 recorded in host byte order, otherwise BUFFER is an array of bytes
246 and the value is recorded in target byte order).
247 The result is an error message or NULL if success. */
248
249 static const char *
insert_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buffer,bfd_vma pc)250 insert_insn_normal (CGEN_CPU_DESC cd,
251 const CGEN_INSN * insn,
252 CGEN_FIELDS * fields,
253 CGEN_INSN_BYTES_PTR buffer,
254 bfd_vma pc)
255 {
256 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
257 unsigned long value;
258 const CGEN_SYNTAX_CHAR_TYPE * syn;
259
260 CGEN_INIT_INSERT (cd);
261 value = CGEN_INSN_BASE_VALUE (insn);
262
263 /* If we're recording insns as numbers (rather than a string of bytes),
264 target byte order handling is deferred until later. */
265
266 #if CGEN_INT_INSN_P
267
268 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
269 CGEN_FIELDS_BITSIZE (fields), value);
270
271 #else
272
273 cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
274 (unsigned) CGEN_FIELDS_BITSIZE (fields)),
275 value, cd->insn_endian);
276
277 #endif /* ! CGEN_INT_INSN_P */
278
279 /* ??? It would be better to scan the format's fields.
280 Still need to be able to insert a value based on the operand though;
281 e.g. storing a branch displacement that got resolved later.
282 Needs more thought first. */
283
284 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
285 {
286 const char *errmsg;
287
288 if (CGEN_SYNTAX_CHAR_P (* syn))
289 continue;
290
291 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
292 fields, buffer, pc);
293 if (errmsg)
294 return errmsg;
295 }
296
297 return NULL;
298 }
299
300 #if CGEN_INT_INSN_P
301 /* Cover function to store an insn value into an integral insn. Must go here
302 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
303
304 static void
put_insn_int_value(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,CGEN_INSN_BYTES_PTR buf,int length,int insn_length,CGEN_INSN_INT value)305 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
306 CGEN_INSN_BYTES_PTR buf,
307 int length,
308 int insn_length,
309 CGEN_INSN_INT value)
310 {
311 /* For architectures with insns smaller than the base-insn-bitsize,
312 length may be too big. */
313 if (length > insn_length)
314 *buf = value;
315 else
316 {
317 int shift = insn_length - length;
318 /* Written this way to avoid undefined behaviour. */
319 CGEN_INSN_INT mask = length == 0 ? 0 : (1UL << (length - 1) << 1) - 1;
320
321 *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
322 }
323 }
324 #endif
325
326 /* Operand extraction. */
327
328 #if ! CGEN_INT_INSN_P
329
330 /* Subroutine of extract_normal.
331 Ensure sufficient bytes are cached in EX_INFO.
332 OFFSET is the offset in bytes from the start of the insn of the value.
333 BYTES is the length of the needed value.
334 Returns 1 for success, 0 for failure. */
335
336 static CGEN_INLINE int
fill_cache(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,CGEN_EXTRACT_INFO * ex_info,int offset,int bytes,bfd_vma pc)337 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
338 CGEN_EXTRACT_INFO *ex_info,
339 int offset,
340 int bytes,
341 bfd_vma pc)
342 {
343 /* It's doubtful that the middle part has already been fetched so
344 we don't optimize that case. kiss. */
345 unsigned int mask;
346 disassemble_info *info = (disassemble_info *) ex_info->dis_info;
347
348 /* First do a quick check. */
349 mask = (1 << bytes) - 1;
350 if (((ex_info->valid >> offset) & mask) == mask)
351 return 1;
352
353 /* Search for the first byte we need to read. */
354 for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
355 if (! (mask & ex_info->valid))
356 break;
357
358 if (bytes)
359 {
360 int status;
361
362 pc += offset;
363 status = (*info->read_memory_func)
364 (pc, ex_info->insn_bytes + offset, bytes, info);
365
366 if (status != 0)
367 {
368 (*info->memory_error_func) (status, pc, info);
369 return 0;
370 }
371
372 ex_info->valid |= ((1 << bytes) - 1) << offset;
373 }
374
375 return 1;
376 }
377
378 /* Subroutine of extract_normal. */
379
380 static CGEN_INLINE long
extract_1(CGEN_CPU_DESC cd,CGEN_EXTRACT_INFO * ex_info ATTRIBUTE_UNUSED,int start,int length,int word_length,unsigned char * bufp,bfd_vma pc ATTRIBUTE_UNUSED)381 extract_1 (CGEN_CPU_DESC cd,
382 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
383 int start,
384 int length,
385 int word_length,
386 unsigned char *bufp,
387 bfd_vma pc ATTRIBUTE_UNUSED)
388 {
389 unsigned long x;
390 int shift;
391
392 x = cgen_get_insn_value (cd, bufp, word_length, cd->endian);
393
394 if (CGEN_INSN_LSB0_P)
395 shift = (start + 1) - length;
396 else
397 shift = (word_length - (start + length));
398 return x >> shift;
399 }
400
401 #endif /* ! CGEN_INT_INSN_P */
402
403 /* Default extraction routine.
404
405 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
406 or sometimes less for cases like the m32r where the base insn size is 32
407 but some insns are 16 bits.
408 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
409 but for generality we take a bitmask of all of them.
410 WORD_OFFSET is the offset in bits from the start of the insn of the value.
411 WORD_LENGTH is the length of the word in bits in which the value resides.
412 START is the starting bit number in the word, architecture origin.
413 LENGTH is the length of VALUE in bits.
414 TOTAL_LENGTH is the total length of the insn in bits.
415
416 Returns 1 for success, 0 for failure. */
417
418 /* ??? The return code isn't properly used. wip. */
419
420 /* ??? This doesn't handle bfd_vma's. Create another function when
421 necessary. */
422
423 static int
extract_normal(CGEN_CPU_DESC cd,CGEN_EXTRACT_INFO * ex_info,CGEN_INSN_INT insn_value,unsigned int attrs,unsigned int word_offset,unsigned int start,unsigned int length,unsigned int word_length,unsigned int total_length,bfd_vma pc,long * valuep)424 extract_normal (CGEN_CPU_DESC cd,
425 #if ! CGEN_INT_INSN_P
426 CGEN_EXTRACT_INFO *ex_info,
427 #else
428 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
429 #endif
430 CGEN_INSN_INT insn_value,
431 unsigned int attrs,
432 unsigned int word_offset,
433 unsigned int start,
434 unsigned int length,
435 unsigned int word_length,
436 unsigned int total_length,
437 #if ! CGEN_INT_INSN_P
438 bfd_vma pc,
439 #else
440 bfd_vma pc ATTRIBUTE_UNUSED,
441 #endif
442 long *valuep)
443 {
444 long value, mask;
445
446 /* If LENGTH is zero, this operand doesn't contribute to the value
447 so give it a standard value of zero. */
448 if (length == 0)
449 {
450 *valuep = 0;
451 return 1;
452 }
453
454 if (word_length > 8 * sizeof (CGEN_INSN_INT))
455 abort ();
456
457 /* For architectures with insns smaller than the insn-base-bitsize,
458 word_length may be too big. */
459 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
460 {
461 if (word_offset + word_length > total_length)
462 word_length = total_length - word_offset;
463 }
464
465 /* Does the value reside in INSN_VALUE, and at the right alignment? */
466
467 if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
468 {
469 if (CGEN_INSN_LSB0_P)
470 value = insn_value >> ((word_offset + start + 1) - length);
471 else
472 value = insn_value >> (total_length - ( word_offset + start + length));
473 }
474
475 #if ! CGEN_INT_INSN_P
476
477 else
478 {
479 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
480
481 if (word_length > 8 * sizeof (CGEN_INSN_INT))
482 abort ();
483
484 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
485 {
486 *valuep = 0;
487 return 0;
488 }
489
490 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
491 }
492
493 #endif /* ! CGEN_INT_INSN_P */
494
495 /* Written this way to avoid undefined behaviour. */
496 mask = (1UL << (length - 1) << 1) - 1;
497
498 value &= mask;
499 /* sign extend? */
500 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
501 && (value & (1UL << (length - 1))))
502 value |= ~mask;
503
504 *valuep = value;
505
506 return 1;
507 }
508
509 /* Default insn extractor.
510
511 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
512 The extracted fields are stored in FIELDS.
513 EX_INFO is used to handle reading variable length insns.
514 Return the length of the insn in bits, or 0 if no match,
515 or -1 if an error occurs fetching data (memory_error_func will have
516 been called). */
517
518 static int
extract_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,CGEN_EXTRACT_INFO * ex_info,CGEN_INSN_INT insn_value,CGEN_FIELDS * fields,bfd_vma pc)519 extract_insn_normal (CGEN_CPU_DESC cd,
520 const CGEN_INSN *insn,
521 CGEN_EXTRACT_INFO *ex_info,
522 CGEN_INSN_INT insn_value,
523 CGEN_FIELDS *fields,
524 bfd_vma pc)
525 {
526 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
527 const CGEN_SYNTAX_CHAR_TYPE *syn;
528
529 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
530
531 CGEN_INIT_EXTRACT (cd);
532
533 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
534 {
535 int length;
536
537 if (CGEN_SYNTAX_CHAR_P (*syn))
538 continue;
539
540 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
541 ex_info, insn_value, fields, pc);
542 if (length <= 0)
543 return length;
544 }
545
546 /* We recognized and successfully extracted this insn. */
547 return CGEN_INSN_BITSIZE (insn);
548 }
549
550 /* Machine generated code added here. */
551
552 const char * ip2k_cgen_insert_operand
553 (CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
554
555 /* Main entry point for operand insertion.
556
557 This function is basically just a big switch statement. Earlier versions
558 used tables to look up the function to use, but
559 - if the table contains both assembler and disassembler functions then
560 the disassembler contains much of the assembler and vice-versa,
561 - there's a lot of inlining possibilities as things grow,
562 - using a switch statement avoids the function call overhead.
563
564 This function could be moved into `parse_insn_normal', but keeping it
565 separate makes clear the interface between `parse_insn_normal' and each of
566 the handlers. It's also needed by GAS to insert operands that couldn't be
567 resolved during parsing. */
568
569 const char *
ip2k_cgen_insert_operand(CGEN_CPU_DESC cd,int opindex,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buffer,bfd_vma pc ATTRIBUTE_UNUSED)570 ip2k_cgen_insert_operand (CGEN_CPU_DESC cd,
571 int opindex,
572 CGEN_FIELDS * fields,
573 CGEN_INSN_BYTES_PTR buffer,
574 bfd_vma pc ATTRIBUTE_UNUSED)
575 {
576 const char * errmsg = NULL;
577 unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
578
579 switch (opindex)
580 {
581 case IP2K_OPERAND_ADDR16CJP :
582 errmsg = insert_normal (cd, fields->f_addr16cjp, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, buffer);
583 break;
584 case IP2K_OPERAND_ADDR16H :
585 errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
586 break;
587 case IP2K_OPERAND_ADDR16L :
588 errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
589 break;
590 case IP2K_OPERAND_ADDR16P :
591 errmsg = insert_normal (cd, fields->f_page3, 0, 0, 2, 3, 16, total_length, buffer);
592 break;
593 case IP2K_OPERAND_BITNO :
594 errmsg = insert_normal (cd, fields->f_bitno, 0, 0, 11, 3, 16, total_length, buffer);
595 break;
596 case IP2K_OPERAND_CBIT :
597 break;
598 case IP2K_OPERAND_DCBIT :
599 break;
600 case IP2K_OPERAND_FR :
601 errmsg = insert_normal (cd, fields->f_reg, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, buffer);
602 break;
603 case IP2K_OPERAND_LIT8 :
604 errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
605 break;
606 case IP2K_OPERAND_PABITS :
607 break;
608 case IP2K_OPERAND_RETI3 :
609 errmsg = insert_normal (cd, fields->f_reti3, 0, 0, 2, 3, 16, total_length, buffer);
610 break;
611 case IP2K_OPERAND_ZBIT :
612 break;
613
614 default :
615 /* xgettext:c-format */
616 opcodes_error_handler
617 (_("internal error: unrecognized field %d while building insn"),
618 opindex);
619 abort ();
620 }
621
622 return errmsg;
623 }
624
625 int ip2k_cgen_extract_operand
626 (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
627
628 /* Main entry point for operand extraction.
629 The result is <= 0 for error, >0 for success.
630 ??? Actual values aren't well defined right now.
631
632 This function is basically just a big switch statement. Earlier versions
633 used tables to look up the function to use, but
634 - if the table contains both assembler and disassembler functions then
635 the disassembler contains much of the assembler and vice-versa,
636 - there's a lot of inlining possibilities as things grow,
637 - using a switch statement avoids the function call overhead.
638
639 This function could be moved into `print_insn_normal', but keeping it
640 separate makes clear the interface between `print_insn_normal' and each of
641 the handlers. */
642
643 int
ip2k_cgen_extract_operand(CGEN_CPU_DESC cd,int opindex,CGEN_EXTRACT_INFO * ex_info,CGEN_INSN_INT insn_value,CGEN_FIELDS * fields,bfd_vma pc)644 ip2k_cgen_extract_operand (CGEN_CPU_DESC cd,
645 int opindex,
646 CGEN_EXTRACT_INFO *ex_info,
647 CGEN_INSN_INT insn_value,
648 CGEN_FIELDS * fields,
649 bfd_vma pc)
650 {
651 /* Assume success (for those operands that are nops). */
652 int length = 1;
653 unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
654
655 switch (opindex)
656 {
657 case IP2K_OPERAND_ADDR16CJP :
658 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, pc, & fields->f_addr16cjp);
659 break;
660 case IP2K_OPERAND_ADDR16H :
661 length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
662 break;
663 case IP2K_OPERAND_ADDR16L :
664 length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
665 break;
666 case IP2K_OPERAND_ADDR16P :
667 length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_page3);
668 break;
669 case IP2K_OPERAND_BITNO :
670 length = extract_normal (cd, ex_info, insn_value, 0, 0, 11, 3, 16, total_length, pc, & fields->f_bitno);
671 break;
672 case IP2K_OPERAND_CBIT :
673 break;
674 case IP2K_OPERAND_DCBIT :
675 break;
676 case IP2K_OPERAND_FR :
677 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, pc, & fields->f_reg);
678 break;
679 case IP2K_OPERAND_LIT8 :
680 length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
681 break;
682 case IP2K_OPERAND_PABITS :
683 break;
684 case IP2K_OPERAND_RETI3 :
685 length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_reti3);
686 break;
687 case IP2K_OPERAND_ZBIT :
688 break;
689
690 default :
691 /* xgettext:c-format */
692 opcodes_error_handler
693 (_("internal error: unrecognized field %d while decoding insn"),
694 opindex);
695 abort ();
696 }
697
698 return length;
699 }
700
701 cgen_insert_fn * const ip2k_cgen_insert_handlers[] =
702 {
703 insert_insn_normal,
704 };
705
706 cgen_extract_fn * const ip2k_cgen_extract_handlers[] =
707 {
708 extract_insn_normal,
709 };
710
711 int ip2k_cgen_get_int_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
712 bfd_vma ip2k_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
713
714 /* Getting values from cgen_fields is handled by a collection of functions.
715 They are distinguished by the type of the VALUE argument they return.
716 TODO: floating point, inlining support, remove cases where result type
717 not appropriate. */
718
719 int
ip2k_cgen_get_int_operand(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,int opindex,const CGEN_FIELDS * fields)720 ip2k_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
721 int opindex,
722 const CGEN_FIELDS * fields)
723 {
724 int value;
725
726 switch (opindex)
727 {
728 case IP2K_OPERAND_ADDR16CJP :
729 value = fields->f_addr16cjp;
730 break;
731 case IP2K_OPERAND_ADDR16H :
732 value = fields->f_imm8;
733 break;
734 case IP2K_OPERAND_ADDR16L :
735 value = fields->f_imm8;
736 break;
737 case IP2K_OPERAND_ADDR16P :
738 value = fields->f_page3;
739 break;
740 case IP2K_OPERAND_BITNO :
741 value = fields->f_bitno;
742 break;
743 case IP2K_OPERAND_CBIT :
744 value = 0;
745 break;
746 case IP2K_OPERAND_DCBIT :
747 value = 0;
748 break;
749 case IP2K_OPERAND_FR :
750 value = fields->f_reg;
751 break;
752 case IP2K_OPERAND_LIT8 :
753 value = fields->f_imm8;
754 break;
755 case IP2K_OPERAND_PABITS :
756 value = 0;
757 break;
758 case IP2K_OPERAND_RETI3 :
759 value = fields->f_reti3;
760 break;
761 case IP2K_OPERAND_ZBIT :
762 value = 0;
763 break;
764
765 default :
766 /* xgettext:c-format */
767 opcodes_error_handler
768 (_("internal error: unrecognized field %d while getting int operand"),
769 opindex);
770 abort ();
771 }
772
773 return value;
774 }
775
776 bfd_vma
ip2k_cgen_get_vma_operand(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,int opindex,const CGEN_FIELDS * fields)777 ip2k_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
778 int opindex,
779 const CGEN_FIELDS * fields)
780 {
781 bfd_vma value;
782
783 switch (opindex)
784 {
785 case IP2K_OPERAND_ADDR16CJP :
786 value = fields->f_addr16cjp;
787 break;
788 case IP2K_OPERAND_ADDR16H :
789 value = fields->f_imm8;
790 break;
791 case IP2K_OPERAND_ADDR16L :
792 value = fields->f_imm8;
793 break;
794 case IP2K_OPERAND_ADDR16P :
795 value = fields->f_page3;
796 break;
797 case IP2K_OPERAND_BITNO :
798 value = fields->f_bitno;
799 break;
800 case IP2K_OPERAND_CBIT :
801 value = 0;
802 break;
803 case IP2K_OPERAND_DCBIT :
804 value = 0;
805 break;
806 case IP2K_OPERAND_FR :
807 value = fields->f_reg;
808 break;
809 case IP2K_OPERAND_LIT8 :
810 value = fields->f_imm8;
811 break;
812 case IP2K_OPERAND_PABITS :
813 value = 0;
814 break;
815 case IP2K_OPERAND_RETI3 :
816 value = fields->f_reti3;
817 break;
818 case IP2K_OPERAND_ZBIT :
819 value = 0;
820 break;
821
822 default :
823 /* xgettext:c-format */
824 opcodes_error_handler
825 (_("internal error: unrecognized field %d while getting vma operand"),
826 opindex);
827 abort ();
828 }
829
830 return value;
831 }
832
833 void ip2k_cgen_set_int_operand (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
834 void ip2k_cgen_set_vma_operand (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
835
836 /* Stuffing values in cgen_fields is handled by a collection of functions.
837 They are distinguished by the type of the VALUE argument they accept.
838 TODO: floating point, inlining support, remove cases where argument type
839 not appropriate. */
840
841 void
ip2k_cgen_set_int_operand(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,int opindex,CGEN_FIELDS * fields,int value)842 ip2k_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
843 int opindex,
844 CGEN_FIELDS * fields,
845 int value)
846 {
847 switch (opindex)
848 {
849 case IP2K_OPERAND_ADDR16CJP :
850 fields->f_addr16cjp = value;
851 break;
852 case IP2K_OPERAND_ADDR16H :
853 fields->f_imm8 = value;
854 break;
855 case IP2K_OPERAND_ADDR16L :
856 fields->f_imm8 = value;
857 break;
858 case IP2K_OPERAND_ADDR16P :
859 fields->f_page3 = value;
860 break;
861 case IP2K_OPERAND_BITNO :
862 fields->f_bitno = value;
863 break;
864 case IP2K_OPERAND_CBIT :
865 break;
866 case IP2K_OPERAND_DCBIT :
867 break;
868 case IP2K_OPERAND_FR :
869 fields->f_reg = value;
870 break;
871 case IP2K_OPERAND_LIT8 :
872 fields->f_imm8 = value;
873 break;
874 case IP2K_OPERAND_PABITS :
875 break;
876 case IP2K_OPERAND_RETI3 :
877 fields->f_reti3 = value;
878 break;
879 case IP2K_OPERAND_ZBIT :
880 break;
881
882 default :
883 /* xgettext:c-format */
884 opcodes_error_handler
885 (_("internal error: unrecognized field %d while setting int operand"),
886 opindex);
887 abort ();
888 }
889 }
890
891 void
ip2k_cgen_set_vma_operand(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,int opindex,CGEN_FIELDS * fields,bfd_vma value)892 ip2k_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
893 int opindex,
894 CGEN_FIELDS * fields,
895 bfd_vma value)
896 {
897 switch (opindex)
898 {
899 case IP2K_OPERAND_ADDR16CJP :
900 fields->f_addr16cjp = value;
901 break;
902 case IP2K_OPERAND_ADDR16H :
903 fields->f_imm8 = value;
904 break;
905 case IP2K_OPERAND_ADDR16L :
906 fields->f_imm8 = value;
907 break;
908 case IP2K_OPERAND_ADDR16P :
909 fields->f_page3 = value;
910 break;
911 case IP2K_OPERAND_BITNO :
912 fields->f_bitno = value;
913 break;
914 case IP2K_OPERAND_CBIT :
915 break;
916 case IP2K_OPERAND_DCBIT :
917 break;
918 case IP2K_OPERAND_FR :
919 fields->f_reg = value;
920 break;
921 case IP2K_OPERAND_LIT8 :
922 fields->f_imm8 = value;
923 break;
924 case IP2K_OPERAND_PABITS :
925 break;
926 case IP2K_OPERAND_RETI3 :
927 fields->f_reti3 = value;
928 break;
929 case IP2K_OPERAND_ZBIT :
930 break;
931
932 default :
933 /* xgettext:c-format */
934 opcodes_error_handler
935 (_("internal error: unrecognized field %d while setting vma operand"),
936 opindex);
937 abort ();
938 }
939 }
940
941 /* Function to call before using the instruction builder tables. */
942
943 void
ip2k_cgen_init_ibld_table(CGEN_CPU_DESC cd)944 ip2k_cgen_init_ibld_table (CGEN_CPU_DESC cd)
945 {
946 cd->insert_handlers = & ip2k_cgen_insert_handlers[0];
947 cd->extract_handlers = & ip2k_cgen_extract_handlers[0];
948
949 cd->insert_operand = ip2k_cgen_insert_operand;
950 cd->extract_operand = ip2k_cgen_extract_operand;
951
952 cd->get_int_operand = ip2k_cgen_get_int_operand;
953 cd->set_int_operand = ip2k_cgen_set_int_operand;
954 cd->get_vma_operand = ip2k_cgen_get_vma_operand;
955 cd->set_vma_operand = ip2k_cgen_set_vma_operand;
956 }
957