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More signed overflow fixes
[deliverable/binutils-gdb.git] / opcodes / ip2k-ibld.c
CommitLineData
4162bb66 1/* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
a40cbfa3
NC		 2/* Instruction building/extraction support for ip2k. -*- C -*-
3
47b0e7ad
NC		 4 THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
5 - the resultant file is machine generated, cgen-ibld.in isn't
a40cbfa3 6
82704155 7 Copyright (C) 1996-2019 Free Software Foundation, Inc.
a40cbfa3 8
9b201bb5 9 This file is part of libopcodes.
a40cbfa3 10
9b201bb5 11 This library is free software; you can redistribute it and/or modify
47b0e7ad 12 it under the terms of the GNU General Public License as published by
9b201bb5 13 the Free Software Foundation; either version 3, or (at your option)
47b0e7ad 14 any later version.
a40cbfa3 15
9b201bb5
NC		 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.
a40cbfa3 20
47b0e7ad
NC		 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. */
a40cbfa3
NC		 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"
fe8afbc4 36#include "cgen/basic-modes.h"
a40cbfa3
NC		 37#include "opintl.h"
38#include "safe-ctype.h"
39
47b0e7ad 40#undef min
a40cbfa3 41#define min(a,b) ((a) < (b) ? (a) : (b))
47b0e7ad 42#undef max
a40cbfa3
NC		 43#define max(a,b) ((a) > (b) ? (a) : (b))
44
45/* Used by the ifield rtx function. */
46#define FLD(f) (fields->f)
47
48static const char * insert_normal
ffead7ae
MM		 49 (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
50 unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
a40cbfa3 51static const char * insert_insn_normal
ffead7ae
MM		 52 (CGEN_CPU_DESC, const CGEN_INSN *,
53 CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
a40cbfa3 54static int extract_normal
ffead7ae
MM		 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 *);
a40cbfa3 58static int extract_insn_normal
ffead7ae
MM		 59 (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
60 CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
a40cbfa3
NC		 61#if CGEN_INT_INSN_P
62static void put_insn_int_value
ffead7ae 63 (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
a40cbfa3
NC		 64#endif
65#if ! CGEN_INT_INSN_P
66static CGEN_INLINE void insert_1
ffead7ae 67 (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
a40cbfa3 68static CGEN_INLINE int fill_cache
ffead7ae 69 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, bfd_vma);
a40cbfa3 70static CGEN_INLINE long extract_1
ffead7ae 71 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
a40cbfa3
NC		 72#endif
73\f
74/* Operand insertion. */
75
76#if ! CGEN_INT_INSN_P
77
78/* Subroutine of insert_normal. */
79
80static CGEN_INLINE void
ffead7ae
MM		 81insert_1 (CGEN_CPU_DESC cd,
82 unsigned long value,
83 int start,
84 int length,
85 int word_length,
86 unsigned char *bufp)
a40cbfa3
NC		 87{
88 unsigned long x,mask;
89 int shift;
90
91 x = cgen_get_insn_value (cd, bufp, word_length);
92
93 /* Written this way to avoid undefined behaviour. */
94 mask = (((1L << (length - 1)) - 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);
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
122static const char *
ffead7ae
MM		 123insert_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)
a40cbfa3
NC		 132{
133 static char errbuf[100];
134 /* Written this way to avoid undefined behaviour. */
135 unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
136
137 /* If LENGTH is zero, this operand doesn't contribute to the value. */
138 if (length == 0)
139 return NULL;
140
b7cd1872 141 if (word_length > 8 * sizeof (CGEN_INSN_INT))
a40cbfa3
NC		 142 abort ();
143
144 /* For architectures with insns smaller than the base-insn-bitsize,
145 word_length may be too big. */
146 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
147 {
148 if (word_offset == 0
149 && word_length > total_length)
150 word_length = total_length;
151 }
152
153 /* Ensure VALUE will fit. */
154 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
155 {
156 long minval = - (1L << (length - 1));
157 unsigned long maxval = mask;
43e65147 158
a40cbfa3
NC		 159 if ((value > 0 && (unsigned long) value > maxval)
160 || value < minval)
161 {
162 /* xgettext:c-format */
163 sprintf (errbuf,
164 _("operand out of range (%ld not between %ld and %lu)"),
165 value, minval, maxval);
166 return errbuf;
167 }
168 }
169 else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
170 {
171 unsigned long maxval = mask;
ed963e2d
NC		 172 unsigned long val = (unsigned long) value;
173
174 /* For hosts with a word size > 32 check to see if value has been sign
175 extended beyond 32 bits. If so then ignore these higher sign bits
176 as the user is attempting to store a 32-bit signed value into an
177 unsigned 32-bit field which is allowed. */
178 if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
179 val &= 0xFFFFFFFF;
180
181 if (val > maxval)
a40cbfa3
NC		 182 {
183 /* xgettext:c-format */
184 sprintf (errbuf,
ed963e2d
NC		 185 _("operand out of range (0x%lx not between 0 and 0x%lx)"),
186 val, maxval);
a40cbfa3
NC		 187 return errbuf;
188 }
189 }
190 else
191 {
192 if (! cgen_signed_overflow_ok_p (cd))
193 {
194 long minval = - (1L << (length - 1));
195 long maxval = (1L << (length - 1)) - 1;
43e65147 196
a40cbfa3
NC		 197 if (value < minval || value > maxval)
198 {
199 sprintf
200 /* xgettext:c-format */
201 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
202 value, minval, maxval);
203 return errbuf;
204 }
205 }
206 }
207
208#if CGEN_INT_INSN_P
209
210 {
a143b004 211 int shift_within_word, shift_to_word, shift;
a40cbfa3 212
a143b004
AB		 213 /* How to shift the value to BIT0 of the word. */
214 shift_to_word = total_length - (word_offset + word_length);
215
216 /* How to shift the value to the field within the word. */
a40cbfa3 217 if (CGEN_INSN_LSB0_P)
a143b004 218 shift_within_word = start + 1 - length;
a40cbfa3 219 else
a143b004
AB		 220 shift_within_word = word_length - start - length;
221
222 /* The total SHIFT, then mask in the value. */
223 shift = shift_to_word + shift_within_word;
a40cbfa3
NC		 224 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
225 }
226
227#else /* ! CGEN_INT_INSN_P */
228
229 {
230 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
231
232 insert_1 (cd, value, start, length, word_length, bufp);
233 }
234
235#endif /* ! CGEN_INT_INSN_P */
236
237 return NULL;
238}
239
240/* Default insn builder (insert handler).
241 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
242 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
243 recorded in host byte order, otherwise BUFFER is an array of bytes
244 and the value is recorded in target byte order).
245 The result is an error message or NULL if success. */
246
247static const char *
ffead7ae
MM		 248insert_insn_normal (CGEN_CPU_DESC cd,
249 const CGEN_INSN * insn,
250 CGEN_FIELDS * fields,
251 CGEN_INSN_BYTES_PTR buffer,
252 bfd_vma pc)
a40cbfa3
NC		 253{
254 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
255 unsigned long value;
256 const CGEN_SYNTAX_CHAR_TYPE * syn;
257
258 CGEN_INIT_INSERT (cd);
259 value = CGEN_INSN_BASE_VALUE (insn);
260
261 /* If we're recording insns as numbers (rather than a string of bytes),
262 target byte order handling is deferred until later. */
263
264#if CGEN_INT_INSN_P
265
266 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
267 CGEN_FIELDS_BITSIZE (fields), value);
268
269#else
270
271 cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
272 (unsigned) CGEN_FIELDS_BITSIZE (fields)),
273 value);
274
275#endif /* ! CGEN_INT_INSN_P */
276
277 /* ??? It would be better to scan the format's fields.
278 Still need to be able to insert a value based on the operand though;
279 e.g. storing a branch displacement that got resolved later.
280 Needs more thought first. */
281
282 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
283 {
284 const char *errmsg;
285
286 if (CGEN_SYNTAX_CHAR_P (* syn))
287 continue;
288
289 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
290 fields, buffer, pc);
291 if (errmsg)
292 return errmsg;
293 }
294
295 return NULL;
296}
297
298#if CGEN_INT_INSN_P
299/* Cover function to store an insn value into an integral insn. Must go here
47b0e7ad 300 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
a40cbfa3
NC		 301
302static void
ffead7ae
MM		 303put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
304 CGEN_INSN_BYTES_PTR buf,
305 int length,
306 int insn_length,
307 CGEN_INSN_INT value)
a40cbfa3
NC		 308{
309 /* For architectures with insns smaller than the base-insn-bitsize,
310 length may be too big. */
311 if (length > insn_length)
312 *buf = value;
313 else
314 {
315 int shift = insn_length - length;
316 /* Written this way to avoid undefined behaviour. */
317 CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
47b0e7ad 318
a40cbfa3
NC		 319 *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
320 }
321}
322#endif
323\f
324/* Operand extraction. */
325
326#if ! CGEN_INT_INSN_P
327
328/* Subroutine of extract_normal.
329 Ensure sufficient bytes are cached in EX_INFO.
330 OFFSET is the offset in bytes from the start of the insn of the value.
331 BYTES is the length of the needed value.
332 Returns 1 for success, 0 for failure. */
333
334static CGEN_INLINE int
ffead7ae
MM		 335fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
336 CGEN_EXTRACT_INFO *ex_info,
337 int offset,
338 int bytes,
339 bfd_vma pc)
a40cbfa3
NC		 340{
341 /* It's doubtful that the middle part has already been fetched so
342 we don't optimize that case. kiss. */
343 unsigned int mask;
344 disassemble_info *info = (disassemble_info *) ex_info->dis_info;
345
346 /* First do a quick check. */
347 mask = (1 << bytes) - 1;
348 if (((ex_info->valid >> offset) & mask) == mask)
349 return 1;
350
351 /* Search for the first byte we need to read. */
352 for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
353 if (! (mask & ex_info->valid))
354 break;
355
356 if (bytes)
357 {
358 int status;
359
360 pc += offset;
361 status = (*info->read_memory_func)
362 (pc, ex_info->insn_bytes + offset, bytes, info);
363
364 if (status != 0)
365 {
366 (*info->memory_error_func) (status, pc, info);
367 return 0;
368 }
369
370 ex_info->valid |= ((1 << bytes) - 1) << offset;
371 }
372
373 return 1;
374}
375
376/* Subroutine of extract_normal. */
377
378static CGEN_INLINE long
ffead7ae
MM		 379extract_1 (CGEN_CPU_DESC cd,
380 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
381 int start,
382 int length,
383 int word_length,
384 unsigned char *bufp,
385 bfd_vma pc ATTRIBUTE_UNUSED)
a40cbfa3
NC		 386{
387 unsigned long x;
388 int shift;
47b0e7ad 389
a40cbfa3
NC		 390 x = cgen_get_insn_value (cd, bufp, word_length);
391
392 if (CGEN_INSN_LSB0_P)
393 shift = (start + 1) - length;
394 else
395 shift = (word_length - (start + length));
396 return x >> shift;
397}
398
399#endif /* ! CGEN_INT_INSN_P */
400
401/* Default extraction routine.
402
403 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
404 or sometimes less for cases like the m32r where the base insn size is 32
405 but some insns are 16 bits.
406 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
407 but for generality we take a bitmask of all of them.
408 WORD_OFFSET is the offset in bits from the start of the insn of the value.
409 WORD_LENGTH is the length of the word in bits in which the value resides.
410 START is the starting bit number in the word, architecture origin.
411 LENGTH is the length of VALUE in bits.
412 TOTAL_LENGTH is the total length of the insn in bits.
413
414 Returns 1 for success, 0 for failure. */
415
416/* ??? The return code isn't properly used. wip. */
417
418/* ??? This doesn't handle bfd_vma's. Create another function when
419 necessary. */
420
421static int
ffead7ae 422extract_normal (CGEN_CPU_DESC cd,
a40cbfa3 423#if ! CGEN_INT_INSN_P
ffead7ae 424 CGEN_EXTRACT_INFO *ex_info,
a40cbfa3 425#else
ffead7ae 426 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
a40cbfa3 427#endif
ffead7ae
MM		 428 CGEN_INSN_INT insn_value,
429 unsigned int attrs,
430 unsigned int word_offset,
431 unsigned int start,
432 unsigned int length,
433 unsigned int word_length,
434 unsigned int total_length,
a40cbfa3 435#if ! CGEN_INT_INSN_P
ffead7ae 436 bfd_vma pc,
a40cbfa3 437#else
ffead7ae 438 bfd_vma pc ATTRIBUTE_UNUSED,
a40cbfa3 439#endif
ffead7ae 440 long *valuep)
a40cbfa3
NC		 441{
442 long value, mask;
443
444 /* If LENGTH is zero, this operand doesn't contribute to the value
445 so give it a standard value of zero. */
446 if (length == 0)
447 {
448 *valuep = 0;
449 return 1;
450 }
451
b7cd1872 452 if (word_length > 8 * sizeof (CGEN_INSN_INT))
a40cbfa3
NC		 453 abort ();
454
455 /* For architectures with insns smaller than the insn-base-bitsize,
456 word_length may be too big. */
457 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
458 {
ed963e2d
NC		 459 if (word_offset + word_length > total_length)
460 word_length = total_length - word_offset;
a40cbfa3
NC		 461 }
462
463 /* Does the value reside in INSN_VALUE, and at the right alignment? */
464
465 if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
466 {
467 if (CGEN_INSN_LSB0_P)
468 value = insn_value >> ((word_offset + start + 1) - length);
469 else
470 value = insn_value >> (total_length - ( word_offset + start + length));
471 }
472
473#if ! CGEN_INT_INSN_P
474
475 else
476 {
477 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
478
b7cd1872 479 if (word_length > 8 * sizeof (CGEN_INSN_INT))
a40cbfa3
NC		 480 abort ();
481
482 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
483 return 0;
484
485 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
486 }
487
488#endif /* ! CGEN_INT_INSN_P */
489
490 /* Written this way to avoid undefined behaviour. */
491 mask = (((1L << (length - 1)) - 1) << 1) | 1;
492
493 value &= mask;
494 /* sign extend? */
495 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
496 && (value & (1L << (length - 1))))
497 value |= ~mask;
498
499 *valuep = value;
500
501 return 1;
502}
503
504/* Default insn extractor.
505
506 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
507 The extracted fields are stored in FIELDS.
508 EX_INFO is used to handle reading variable length insns.
509 Return the length of the insn in bits, or 0 if no match,
510 or -1 if an error occurs fetching data (memory_error_func will have
511 been called). */
512
513static int
ffead7ae
MM		 514extract_insn_normal (CGEN_CPU_DESC cd,
515 const CGEN_INSN *insn,
516 CGEN_EXTRACT_INFO *ex_info,
517 CGEN_INSN_INT insn_value,
518 CGEN_FIELDS *fields,
519 bfd_vma pc)
a40cbfa3
NC		 520{
521 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
522 const CGEN_SYNTAX_CHAR_TYPE *syn;
523
524 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
525
526 CGEN_INIT_EXTRACT (cd);
527
528 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
529 {
530 int length;
531
532 if (CGEN_SYNTAX_CHAR_P (*syn))
533 continue;
534
535 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
536 ex_info, insn_value, fields, pc);
537 if (length <= 0)
538 return length;
539 }
540
541 /* We recognized and successfully extracted this insn. */
542 return CGEN_INSN_BITSIZE (insn);
543}
544\f
47b0e7ad 545/* Machine generated code added here. */
a40cbfa3
NC		 546
547const char * ip2k_cgen_insert_operand
47b0e7ad 548 (CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
a40cbfa3
NC		 549
550/* Main entry point for operand insertion.
551
552 This function is basically just a big switch statement. Earlier versions
553 used tables to look up the function to use, but
554 - if the table contains both assembler and disassembler functions then
555 the disassembler contains much of the assembler and vice-versa,
556 - there's a lot of inlining possibilities as things grow,
557 - using a switch statement avoids the function call overhead.
558
559 This function could be moved into `parse_insn_normal', but keeping it
560 separate makes clear the interface between `parse_insn_normal' and each of
561 the handlers. It's also needed by GAS to insert operands that couldn't be
562 resolved during parsing. */
563
564const char *
47b0e7ad
NC		 565ip2k_cgen_insert_operand (CGEN_CPU_DESC cd,
566 int opindex,
567 CGEN_FIELDS * fields,
568 CGEN_INSN_BYTES_PTR buffer,
569 bfd_vma pc ATTRIBUTE_UNUSED)
a40cbfa3
NC		 570{
571 const char * errmsg = NULL;
572 unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
573
574 switch (opindex)
575 {
576 case IP2K_OPERAND_ADDR16CJP :
577 errmsg = insert_normal (cd, fields->f_addr16cjp, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, buffer);
578 break;
579 case IP2K_OPERAND_ADDR16H :
580 errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
581 break;
582 case IP2K_OPERAND_ADDR16L :
583 errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
584 break;
585 case IP2K_OPERAND_ADDR16P :
586 errmsg = insert_normal (cd, fields->f_page3, 0, 0, 2, 3, 16, total_length, buffer);
587 break;
588 case IP2K_OPERAND_BITNO :
589 errmsg = insert_normal (cd, fields->f_bitno, 0, 0, 11, 3, 16, total_length, buffer);
590 break;
591 case IP2K_OPERAND_CBIT :
592 break;
593 case IP2K_OPERAND_DCBIT :
594 break;
595 case IP2K_OPERAND_FR :
596 errmsg = insert_normal (cd, fields->f_reg, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, buffer);
597 break;
598 case IP2K_OPERAND_LIT8 :
599 errmsg = insert_normal (cd, fields->f_imm8, 0, 0, 7, 8, 16, total_length, buffer);
600 break;
601 case IP2K_OPERAND_PABITS :
602 break;
603 case IP2K_OPERAND_RETI3 :
604 errmsg = insert_normal (cd, fields->f_reti3, 0, 0, 2, 3, 16, total_length, buffer);
605 break;
606 case IP2K_OPERAND_ZBIT :
607 break;
608
609 default :
610 /* xgettext:c-format */
a6743a54
AM		 611 opcodes_error_handler
612 (_("internal error: unrecognized field %d while building insn"),
613 opindex);
a40cbfa3
NC		 614 abort ();
615 }
616
617 return errmsg;
618}
619
620int ip2k_cgen_extract_operand
47b0e7ad 621 (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
a40cbfa3
NC		 622
623/* Main entry point for operand extraction.
624 The result is <= 0 for error, >0 for success.
625 ??? Actual values aren't well defined right now.
626
627 This function is basically just a big switch statement. Earlier versions
628 used tables to look up the function to use, but
629 - if the table contains both assembler and disassembler functions then
630 the disassembler contains much of the assembler and vice-versa,
631 - there's a lot of inlining possibilities as things grow,
632 - using a switch statement avoids the function call overhead.
633
634 This function could be moved into `print_insn_normal', but keeping it
635 separate makes clear the interface between `print_insn_normal' and each of
636 the handlers. */
637
638int
47b0e7ad
NC		 639ip2k_cgen_extract_operand (CGEN_CPU_DESC cd,
640 int opindex,
641 CGEN_EXTRACT_INFO *ex_info,
642 CGEN_INSN_INT insn_value,
643 CGEN_FIELDS * fields,
644 bfd_vma pc)
a40cbfa3
NC		 645{
646 /* Assume success (for those operands that are nops). */
647 int length = 1;
648 unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
649
650 switch (opindex)
651 {
652 case IP2K_OPERAND_ADDR16CJP :
653 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 12, 13, 16, total_length, pc, & fields->f_addr16cjp);
654 break;
655 case IP2K_OPERAND_ADDR16H :
656 length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
657 break;
658 case IP2K_OPERAND_ADDR16L :
659 length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
660 break;
661 case IP2K_OPERAND_ADDR16P :
662 length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_page3);
663 break;
664 case IP2K_OPERAND_BITNO :
665 length = extract_normal (cd, ex_info, insn_value, 0, 0, 11, 3, 16, total_length, pc, & fields->f_bitno);
666 break;
667 case IP2K_OPERAND_CBIT :
668 break;
669 case IP2K_OPERAND_DCBIT :
670 break;
671 case IP2K_OPERAND_FR :
672 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_ABS_ADDR), 0, 8, 9, 16, total_length, pc, & fields->f_reg);
673 break;
674 case IP2K_OPERAND_LIT8 :
675 length = extract_normal (cd, ex_info, insn_value, 0, 0, 7, 8, 16, total_length, pc, & fields->f_imm8);
676 break;
677 case IP2K_OPERAND_PABITS :
678 break;
679 case IP2K_OPERAND_RETI3 :
680 length = extract_normal (cd, ex_info, insn_value, 0, 0, 2, 3, 16, total_length, pc, & fields->f_reti3);
681 break;
682 case IP2K_OPERAND_ZBIT :
683 break;
684
685 default :
686 /* xgettext:c-format */
a6743a54
AM		 687 opcodes_error_handler
688 (_("internal error: unrecognized field %d while decoding insn"),
689 opindex);
a40cbfa3
NC		 690 abort ();
691 }
692
693 return length;
694}
695
43e65147 696cgen_insert_fn * const ip2k_cgen_insert_handlers[] =
a40cbfa3
NC		 697{
698 insert_insn_normal,
699};
700
43e65147 701cgen_extract_fn * const ip2k_cgen_extract_handlers[] =
a40cbfa3
NC		 702{
703 extract_insn_normal,
704};
705
47b0e7ad
NC		 706int ip2k_cgen_get_int_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
707bfd_vma ip2k_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
a40cbfa3
NC		 708
709/* Getting values from cgen_fields is handled by a collection of functions.
710 They are distinguished by the type of the VALUE argument they return.
711 TODO: floating point, inlining support, remove cases where result type
712 not appropriate. */
713
714int
47b0e7ad
NC		 715ip2k_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
716 int opindex,
717 const CGEN_FIELDS * fields)
a40cbfa3
NC		 718{
719 int value;
720
721 switch (opindex)
722 {
723 case IP2K_OPERAND_ADDR16CJP :
724 value = fields->f_addr16cjp;
725 break;
726 case IP2K_OPERAND_ADDR16H :
727 value = fields->f_imm8;
728 break;
729 case IP2K_OPERAND_ADDR16L :
730 value = fields->f_imm8;
731 break;
732 case IP2K_OPERAND_ADDR16P :
733 value = fields->f_page3;
734 break;
735 case IP2K_OPERAND_BITNO :
736 value = fields->f_bitno;
737 break;
738 case IP2K_OPERAND_CBIT :
739 value = 0;
740 break;
741 case IP2K_OPERAND_DCBIT :
742 value = 0;
743 break;
744 case IP2K_OPERAND_FR :
745 value = fields->f_reg;
746 break;
747 case IP2K_OPERAND_LIT8 :
748 value = fields->f_imm8;
749 break;
750 case IP2K_OPERAND_PABITS :
751 value = 0;
752 break;
753 case IP2K_OPERAND_RETI3 :
754 value = fields->f_reti3;
755 break;
756 case IP2K_OPERAND_ZBIT :
757 value = 0;
758 break;
759
760 default :
761 /* xgettext:c-format */
a6743a54
AM		 762 opcodes_error_handler
763 (_("internal error: unrecognized field %d while getting int operand"),
764 opindex);
a40cbfa3
NC		 765 abort ();
766 }
767
768 return value;
769}
770
771bfd_vma
47b0e7ad
NC		 772ip2k_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
773 int opindex,
774 const CGEN_FIELDS * fields)
a40cbfa3
NC		 775{
776 bfd_vma value;
777
778 switch (opindex)
779 {
780 case IP2K_OPERAND_ADDR16CJP :
781 value = fields->f_addr16cjp;
782 break;
783 case IP2K_OPERAND_ADDR16H :
784 value = fields->f_imm8;
785 break;
786 case IP2K_OPERAND_ADDR16L :
787 value = fields->f_imm8;
788 break;
789 case IP2K_OPERAND_ADDR16P :
790 value = fields->f_page3;
791 break;
792 case IP2K_OPERAND_BITNO :
793 value = fields->f_bitno;
794 break;
795 case IP2K_OPERAND_CBIT :
796 value = 0;
797 break;
798 case IP2K_OPERAND_DCBIT :
799 value = 0;
800 break;
801 case IP2K_OPERAND_FR :
802 value = fields->f_reg;
803 break;
804 case IP2K_OPERAND_LIT8 :
805 value = fields->f_imm8;
806 break;
807 case IP2K_OPERAND_PABITS :
808 value = 0;
809 break;
810 case IP2K_OPERAND_RETI3 :
811 value = fields->f_reti3;
812 break;
813 case IP2K_OPERAND_ZBIT :
814 value = 0;
815 break;
816
817 default :
818 /* xgettext:c-format */
a6743a54
AM		 819 opcodes_error_handler
820 (_("internal error: unrecognized field %d while getting vma operand"),
821 opindex);
a40cbfa3
NC		 822 abort ();
823 }
824
825 return value;
826}
827
47b0e7ad
NC		 828void ip2k_cgen_set_int_operand (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
829void ip2k_cgen_set_vma_operand (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
a40cbfa3
NC		 830
831/* Stuffing values in cgen_fields is handled by a collection of functions.
832 They are distinguished by the type of the VALUE argument they accept.
833 TODO: floating point, inlining support, remove cases where argument type
834 not appropriate. */
835
836void
47b0e7ad
NC		 837ip2k_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
838 int opindex,
839 CGEN_FIELDS * fields,
840 int value)
a40cbfa3
NC		 841{
842 switch (opindex)
843 {
844 case IP2K_OPERAND_ADDR16CJP :
845 fields->f_addr16cjp = value;
846 break;
847 case IP2K_OPERAND_ADDR16H :
848 fields->f_imm8 = value;
849 break;
850 case IP2K_OPERAND_ADDR16L :
851 fields->f_imm8 = value;
852 break;
853 case IP2K_OPERAND_ADDR16P :
854 fields->f_page3 = value;
855 break;
856 case IP2K_OPERAND_BITNO :
857 fields->f_bitno = value;
858 break;
859 case IP2K_OPERAND_CBIT :
860 break;
861 case IP2K_OPERAND_DCBIT :
862 break;
863 case IP2K_OPERAND_FR :
864 fields->f_reg = value;
865 break;
866 case IP2K_OPERAND_LIT8 :
867 fields->f_imm8 = value;
868 break;
869 case IP2K_OPERAND_PABITS :
870 break;
871 case IP2K_OPERAND_RETI3 :
872 fields->f_reti3 = value;
873 break;
874 case IP2K_OPERAND_ZBIT :
875 break;
876
877 default :
878 /* xgettext:c-format */
a6743a54
AM		 879 opcodes_error_handler
880 (_("internal error: unrecognized field %d while setting int operand"),
881 opindex);
a40cbfa3
NC		 882 abort ();
883 }
884}
885
886void
47b0e7ad
NC		 887ip2k_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
888 int opindex,
889 CGEN_FIELDS * fields,
890 bfd_vma value)
a40cbfa3
NC		 891{
892 switch (opindex)
893 {
894 case IP2K_OPERAND_ADDR16CJP :
895 fields->f_addr16cjp = value;
896 break;
897 case IP2K_OPERAND_ADDR16H :
898 fields->f_imm8 = value;
899 break;
900 case IP2K_OPERAND_ADDR16L :
901 fields->f_imm8 = value;
902 break;
903 case IP2K_OPERAND_ADDR16P :
904 fields->f_page3 = value;
905 break;
906 case IP2K_OPERAND_BITNO :
907 fields->f_bitno = value;
908 break;
909 case IP2K_OPERAND_CBIT :
910 break;
911 case IP2K_OPERAND_DCBIT :
912 break;
913 case IP2K_OPERAND_FR :
914 fields->f_reg = value;
915 break;
916 case IP2K_OPERAND_LIT8 :
917 fields->f_imm8 = value;
918 break;
919 case IP2K_OPERAND_PABITS :
920 break;
921 case IP2K_OPERAND_RETI3 :
922 fields->f_reti3 = value;
923 break;
924 case IP2K_OPERAND_ZBIT :
925 break;
926
927 default :
928 /* xgettext:c-format */
a6743a54
AM		 929 opcodes_error_handler
930 (_("internal error: unrecognized field %d while setting vma operand"),
931 opindex);
a40cbfa3
NC		 932 abort ();
933 }
934}
935
936/* Function to call before using the instruction builder tables. */
937
938void
47b0e7ad 939ip2k_cgen_init_ibld_table (CGEN_CPU_DESC cd)
a40cbfa3
NC		 940{
941 cd->insert_handlers = & ip2k_cgen_insert_handlers[0];
942 cd->extract_handlers = & ip2k_cgen_extract_handlers[0];
943
944 cd->insert_operand = ip2k_cgen_insert_operand;
945 cd->extract_operand = ip2k_cgen_extract_operand;
946
947 cd->get_int_operand = ip2k_cgen_get_int_operand;
948 cd->set_int_operand = ip2k_cgen_set_int_operand;
949 cd->get_vma_operand = ip2k_cgen_get_vma_operand;
950 cd->set_vma_operand = ip2k_cgen_set_vma_operand;
951}
GDB Binutils - Deliverables
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