1 /* Instruction building/extraction support for lm32. -*- C -*-
2
3 THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
4 - the resultant file is machine generated, cgen-ibld.in isn't
5
6 Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2005, 2006, 2007,
7 2008, 2010 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 "lm32-desc.h"
35 #include "lm32-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);
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
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 /* 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
141 if (word_length > 8 * sizeof (CGEN_INSN_INT))
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;
158
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;
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)
182 {
183 /* xgettext:c-format */
184 sprintf (errbuf,
185 _("operand out of range (0x%lx not between 0 and 0x%lx)"),
186 val, maxval);
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;
196
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 {
211 int shift;
212
213 if (CGEN_INSN_LSB0_P)
214 shift = (word_offset + start + 1) - length;
215 else
216 shift = total_length - (word_offset + start + length);
217 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
218 }
219
220 #else /* ! CGEN_INT_INSN_P */
221
222 {
223 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
224
225 insert_1 (cd, value, start, length, word_length, bufp);
226 }
227
228 #endif /* ! CGEN_INT_INSN_P */
229
230 return NULL;
231 }
232
233 /* Default insn builder (insert handler).
234 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
235 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
236 recorded in host byte order, otherwise BUFFER is an array of bytes
237 and the value is recorded in target byte order).
238 The result is an error message or NULL if success. */
239
240 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)241 insert_insn_normal (CGEN_CPU_DESC cd,
242 const CGEN_INSN * insn,
243 CGEN_FIELDS * fields,
244 CGEN_INSN_BYTES_PTR buffer,
245 bfd_vma pc)
246 {
247 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
248 unsigned long value;
249 const CGEN_SYNTAX_CHAR_TYPE * syn;
250
251 CGEN_INIT_INSERT (cd);
252 value = CGEN_INSN_BASE_VALUE (insn);
253
254 /* If we're recording insns as numbers (rather than a string of bytes),
255 target byte order handling is deferred until later. */
256
257 #if CGEN_INT_INSN_P
258
259 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
260 CGEN_FIELDS_BITSIZE (fields), value);
261
262 #else
263
264 cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
265 (unsigned) CGEN_FIELDS_BITSIZE (fields)),
266 value);
267
268 #endif /* ! CGEN_INT_INSN_P */
269
270 /* ??? It would be better to scan the format's fields.
271 Still need to be able to insert a value based on the operand though;
272 e.g. storing a branch displacement that got resolved later.
273 Needs more thought first. */
274
275 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
276 {
277 const char *errmsg;
278
279 if (CGEN_SYNTAX_CHAR_P (* syn))
280 continue;
281
282 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
283 fields, buffer, pc);
284 if (errmsg)
285 return errmsg;
286 }
287
288 return NULL;
289 }
290
291 #if CGEN_INT_INSN_P
292 /* Cover function to store an insn value into an integral insn. Must go here
293 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
294
295 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)296 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
297 CGEN_INSN_BYTES_PTR buf,
298 int length,
299 int insn_length,
300 CGEN_INSN_INT value)
301 {
302 /* For architectures with insns smaller than the base-insn-bitsize,
303 length may be too big. */
304 if (length > insn_length)
305 *buf = value;
306 else
307 {
308 int shift = insn_length - length;
309 /* Written this way to avoid undefined behaviour. */
310 CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
311
312 *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
313 }
314 }
315 #endif
316
317 /* Operand extraction. */
318
319 #if ! CGEN_INT_INSN_P
320
321 /* Subroutine of extract_normal.
322 Ensure sufficient bytes are cached in EX_INFO.
323 OFFSET is the offset in bytes from the start of the insn of the value.
324 BYTES is the length of the needed value.
325 Returns 1 for success, 0 for failure. */
326
327 static CGEN_INLINE int
fill_cache(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,CGEN_EXTRACT_INFO * ex_info,int offset,int bytes,bfd_vma pc)328 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
329 CGEN_EXTRACT_INFO *ex_info,
330 int offset,
331 int bytes,
332 bfd_vma pc)
333 {
334 /* It's doubtful that the middle part has already been fetched so
335 we don't optimize that case. kiss. */
336 unsigned int mask;
337 disassemble_info *info = (disassemble_info *) ex_info->dis_info;
338
339 /* First do a quick check. */
340 mask = (1 << bytes) - 1;
341 if (((ex_info->valid >> offset) & mask) == mask)
342 return 1;
343
344 /* Search for the first byte we need to read. */
345 for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
346 if (! (mask & ex_info->valid))
347 break;
348
349 if (bytes)
350 {
351 int status;
352
353 pc += offset;
354 status = (*info->read_memory_func)
355 (pc, ex_info->insn_bytes + offset, bytes, info);
356
357 if (status != 0)
358 {
359 (*info->memory_error_func) (status, pc, info);
360 return 0;
361 }
362
363 ex_info->valid |= ((1 << bytes) - 1) << offset;
364 }
365
366 return 1;
367 }
368
369 /* Subroutine of extract_normal. */
370
371 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)372 extract_1 (CGEN_CPU_DESC cd,
373 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
374 int start,
375 int length,
376 int word_length,
377 unsigned char *bufp,
378 bfd_vma pc ATTRIBUTE_UNUSED)
379 {
380 unsigned long x;
381 int shift;
382
383 x = cgen_get_insn_value (cd, bufp, word_length);
384
385 if (CGEN_INSN_LSB0_P)
386 shift = (start + 1) - length;
387 else
388 shift = (word_length - (start + length));
389 return x >> shift;
390 }
391
392 #endif /* ! CGEN_INT_INSN_P */
393
394 /* Default extraction routine.
395
396 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
397 or sometimes less for cases like the m32r where the base insn size is 32
398 but some insns are 16 bits.
399 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
400 but for generality we take a bitmask of all of them.
401 WORD_OFFSET is the offset in bits from the start of the insn of the value.
402 WORD_LENGTH is the length of the word in bits in which the value resides.
403 START is the starting bit number in the word, architecture origin.
404 LENGTH is the length of VALUE in bits.
405 TOTAL_LENGTH is the total length of the insn in bits.
406
407 Returns 1 for success, 0 for failure. */
408
409 /* ??? The return code isn't properly used. wip. */
410
411 /* ??? This doesn't handle bfd_vma's. Create another function when
412 necessary. */
413
414 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)415 extract_normal (CGEN_CPU_DESC cd,
416 #if ! CGEN_INT_INSN_P
417 CGEN_EXTRACT_INFO *ex_info,
418 #else
419 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
420 #endif
421 CGEN_INSN_INT insn_value,
422 unsigned int attrs,
423 unsigned int word_offset,
424 unsigned int start,
425 unsigned int length,
426 unsigned int word_length,
427 unsigned int total_length,
428 #if ! CGEN_INT_INSN_P
429 bfd_vma pc,
430 #else
431 bfd_vma pc ATTRIBUTE_UNUSED,
432 #endif
433 long *valuep)
434 {
435 long value, mask;
436
437 /* If LENGTH is zero, this operand doesn't contribute to the value
438 so give it a standard value of zero. */
439 if (length == 0)
440 {
441 *valuep = 0;
442 return 1;
443 }
444
445 if (word_length > 8 * sizeof (CGEN_INSN_INT))
446 abort ();
447
448 /* For architectures with insns smaller than the insn-base-bitsize,
449 word_length may be too big. */
450 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
451 {
452 if (word_offset + word_length > total_length)
453 word_length = total_length - word_offset;
454 }
455
456 /* Does the value reside in INSN_VALUE, and at the right alignment? */
457
458 if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
459 {
460 if (CGEN_INSN_LSB0_P)
461 value = insn_value >> ((word_offset + start + 1) - length);
462 else
463 value = insn_value >> (total_length - ( word_offset + start + length));
464 }
465
466 #if ! CGEN_INT_INSN_P
467
468 else
469 {
470 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
471
472 if (word_length > 8 * sizeof (CGEN_INSN_INT))
473 abort ();
474
475 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
476 return 0;
477
478 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
479 }
480
481 #endif /* ! CGEN_INT_INSN_P */
482
483 /* Written this way to avoid undefined behaviour. */
484 mask = (((1L << (length - 1)) - 1) << 1) | 1;
485
486 value &= mask;
487 /* sign extend? */
488 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
489 && (value & (1L << (length - 1))))
490 value |= ~mask;
491
492 *valuep = value;
493
494 return 1;
495 }
496
497 /* Default insn extractor.
498
499 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
500 The extracted fields are stored in FIELDS.
501 EX_INFO is used to handle reading variable length insns.
502 Return the length of the insn in bits, or 0 if no match,
503 or -1 if an error occurs fetching data (memory_error_func will have
504 been called). */
505
506 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)507 extract_insn_normal (CGEN_CPU_DESC cd,
508 const CGEN_INSN *insn,
509 CGEN_EXTRACT_INFO *ex_info,
510 CGEN_INSN_INT insn_value,
511 CGEN_FIELDS *fields,
512 bfd_vma pc)
513 {
514 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
515 const CGEN_SYNTAX_CHAR_TYPE *syn;
516
517 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
518
519 CGEN_INIT_EXTRACT (cd);
520
521 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
522 {
523 int length;
524
525 if (CGEN_SYNTAX_CHAR_P (*syn))
526 continue;
527
528 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
529 ex_info, insn_value, fields, pc);
530 if (length <= 0)
531 return length;
532 }
533
534 /* We recognized and successfully extracted this insn. */
535 return CGEN_INSN_BITSIZE (insn);
536 }
537
538 /* Machine generated code added here. */
539
540 const char * lm32_cgen_insert_operand
541 (CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
542
543 /* Main entry point for operand insertion.
544
545 This function is basically just a big switch statement. Earlier versions
546 used tables to look up the function to use, but
547 - if the table contains both assembler and disassembler functions then
548 the disassembler contains much of the assembler and vice-versa,
549 - there's a lot of inlining possibilities as things grow,
550 - using a switch statement avoids the function call overhead.
551
552 This function could be moved into `parse_insn_normal', but keeping it
553 separate makes clear the interface between `parse_insn_normal' and each of
554 the handlers. It's also needed by GAS to insert operands that couldn't be
555 resolved during parsing. */
556
557 const char *
lm32_cgen_insert_operand(CGEN_CPU_DESC cd,int opindex,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buffer,bfd_vma pc ATTRIBUTE_UNUSED)558 lm32_cgen_insert_operand (CGEN_CPU_DESC cd,
559 int opindex,
560 CGEN_FIELDS * fields,
561 CGEN_INSN_BYTES_PTR buffer,
562 bfd_vma pc ATTRIBUTE_UNUSED)
563 {
564 const char * errmsg = NULL;
565 unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
566
567 switch (opindex)
568 {
569 case LM32_OPERAND_BRANCH :
570 {
571 long value = fields->f_branch;
572 value = ((SI) (((value) - (pc))) >> (2));
573 errmsg = insert_normal (cd, value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 15, 16, 32, total_length, buffer);
574 }
575 break;
576 case LM32_OPERAND_CALL :
577 {
578 long value = fields->f_call;
579 value = ((SI) (((value) - (pc))) >> (2));
580 errmsg = insert_normal (cd, value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 25, 26, 32, total_length, buffer);
581 }
582 break;
583 case LM32_OPERAND_CSR :
584 errmsg = insert_normal (cd, fields->f_csr, 0, 0, 25, 5, 32, total_length, buffer);
585 break;
586 case LM32_OPERAND_EXCEPTION :
587 errmsg = insert_normal (cd, fields->f_exception, 0, 0, 25, 26, 32, total_length, buffer);
588 break;
589 case LM32_OPERAND_GOT16 :
590 errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
591 break;
592 case LM32_OPERAND_GOTOFFHI16 :
593 errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
594 break;
595 case LM32_OPERAND_GOTOFFLO16 :
596 errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
597 break;
598 case LM32_OPERAND_GP16 :
599 errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
600 break;
601 case LM32_OPERAND_HI16 :
602 errmsg = insert_normal (cd, fields->f_uimm, 0, 0, 15, 16, 32, total_length, buffer);
603 break;
604 case LM32_OPERAND_IMM :
605 errmsg = insert_normal (cd, fields->f_imm, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
606 break;
607 case LM32_OPERAND_LO16 :
608 errmsg = insert_normal (cd, fields->f_uimm, 0, 0, 15, 16, 32, total_length, buffer);
609 break;
610 case LM32_OPERAND_R0 :
611 errmsg = insert_normal (cd, fields->f_r0, 0, 0, 25, 5, 32, total_length, buffer);
612 break;
613 case LM32_OPERAND_R1 :
614 errmsg = insert_normal (cd, fields->f_r1, 0, 0, 20, 5, 32, total_length, buffer);
615 break;
616 case LM32_OPERAND_R2 :
617 errmsg = insert_normal (cd, fields->f_r2, 0, 0, 15, 5, 32, total_length, buffer);
618 break;
619 case LM32_OPERAND_SHIFT :
620 errmsg = insert_normal (cd, fields->f_shift, 0, 0, 4, 5, 32, total_length, buffer);
621 break;
622 case LM32_OPERAND_UIMM :
623 errmsg = insert_normal (cd, fields->f_uimm, 0, 0, 15, 16, 32, total_length, buffer);
624 break;
625 case LM32_OPERAND_USER :
626 errmsg = insert_normal (cd, fields->f_user, 0, 0, 10, 11, 32, total_length, buffer);
627 break;
628
629 default :
630 /* xgettext:c-format */
631 fprintf (stderr, _("Unrecognized field %d while building insn.\n"),
632 opindex);
633 abort ();
634 }
635
636 return errmsg;
637 }
638
639 int lm32_cgen_extract_operand
640 (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
641
642 /* Main entry point for operand extraction.
643 The result is <= 0 for error, >0 for success.
644 ??? Actual values aren't well defined right now.
645
646 This function is basically just a big switch statement. Earlier versions
647 used tables to look up the function to use, but
648 - if the table contains both assembler and disassembler functions then
649 the disassembler contains much of the assembler and vice-versa,
650 - there's a lot of inlining possibilities as things grow,
651 - using a switch statement avoids the function call overhead.
652
653 This function could be moved into `print_insn_normal', but keeping it
654 separate makes clear the interface between `print_insn_normal' and each of
655 the handlers. */
656
657 int
lm32_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)658 lm32_cgen_extract_operand (CGEN_CPU_DESC cd,
659 int opindex,
660 CGEN_EXTRACT_INFO *ex_info,
661 CGEN_INSN_INT insn_value,
662 CGEN_FIELDS * fields,
663 bfd_vma pc)
664 {
665 /* Assume success (for those operands that are nops). */
666 int length = 1;
667 unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
668
669 switch (opindex)
670 {
671 case LM32_OPERAND_BRANCH :
672 {
673 long value;
674 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 15, 16, 32, total_length, pc, & value);
675 value = ((pc) + (((SI) (((value) << (16))) >> (14))));
676 fields->f_branch = value;
677 }
678 break;
679 case LM32_OPERAND_CALL :
680 {
681 long value;
682 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 25, 26, 32, total_length, pc, & value);
683 value = ((pc) + (((SI) (((value) << (6))) >> (4))));
684 fields->f_call = value;
685 }
686 break;
687 case LM32_OPERAND_CSR :
688 length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_csr);
689 break;
690 case LM32_OPERAND_EXCEPTION :
691 length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 26, 32, total_length, pc, & fields->f_exception);
692 break;
693 case LM32_OPERAND_GOT16 :
694 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
695 break;
696 case LM32_OPERAND_GOTOFFHI16 :
697 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
698 break;
699 case LM32_OPERAND_GOTOFFLO16 :
700 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
701 break;
702 case LM32_OPERAND_GP16 :
703 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
704 break;
705 case LM32_OPERAND_HI16 :
706 length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 16, 32, total_length, pc, & fields->f_uimm);
707 break;
708 case LM32_OPERAND_IMM :
709 length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_imm);
710 break;
711 case LM32_OPERAND_LO16 :
712 length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 16, 32, total_length, pc, & fields->f_uimm);
713 break;
714 case LM32_OPERAND_R0 :
715 length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_r0);
716 break;
717 case LM32_OPERAND_R1 :
718 length = extract_normal (cd, ex_info, insn_value, 0, 0, 20, 5, 32, total_length, pc, & fields->f_r1);
719 break;
720 case LM32_OPERAND_R2 :
721 length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 5, 32, total_length, pc, & fields->f_r2);
722 break;
723 case LM32_OPERAND_SHIFT :
724 length = extract_normal (cd, ex_info, insn_value, 0, 0, 4, 5, 32, total_length, pc, & fields->f_shift);
725 break;
726 case LM32_OPERAND_UIMM :
727 length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 16, 32, total_length, pc, & fields->f_uimm);
728 break;
729 case LM32_OPERAND_USER :
730 length = extract_normal (cd, ex_info, insn_value, 0, 0, 10, 11, 32, total_length, pc, & fields->f_user);
731 break;
732
733 default :
734 /* xgettext:c-format */
735 fprintf (stderr, _("Unrecognized field %d while decoding insn.\n"),
736 opindex);
737 abort ();
738 }
739
740 return length;
741 }
742
743 cgen_insert_fn * const lm32_cgen_insert_handlers[] =
744 {
745 insert_insn_normal,
746 };
747
748 cgen_extract_fn * const lm32_cgen_extract_handlers[] =
749 {
750 extract_insn_normal,
751 };
752
753 int lm32_cgen_get_int_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
754 bfd_vma lm32_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
755
756 /* Getting values from cgen_fields is handled by a collection of functions.
757 They are distinguished by the type of the VALUE argument they return.
758 TODO: floating point, inlining support, remove cases where result type
759 not appropriate. */
760
761 int
lm32_cgen_get_int_operand(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,int opindex,const CGEN_FIELDS * fields)762 lm32_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
763 int opindex,
764 const CGEN_FIELDS * fields)
765 {
766 int value;
767
768 switch (opindex)
769 {
770 case LM32_OPERAND_BRANCH :
771 value = fields->f_branch;
772 break;
773 case LM32_OPERAND_CALL :
774 value = fields->f_call;
775 break;
776 case LM32_OPERAND_CSR :
777 value = fields->f_csr;
778 break;
779 case LM32_OPERAND_EXCEPTION :
780 value = fields->f_exception;
781 break;
782 case LM32_OPERAND_GOT16 :
783 value = fields->f_imm;
784 break;
785 case LM32_OPERAND_GOTOFFHI16 :
786 value = fields->f_imm;
787 break;
788 case LM32_OPERAND_GOTOFFLO16 :
789 value = fields->f_imm;
790 break;
791 case LM32_OPERAND_GP16 :
792 value = fields->f_imm;
793 break;
794 case LM32_OPERAND_HI16 :
795 value = fields->f_uimm;
796 break;
797 case LM32_OPERAND_IMM :
798 value = fields->f_imm;
799 break;
800 case LM32_OPERAND_LO16 :
801 value = fields->f_uimm;
802 break;
803 case LM32_OPERAND_R0 :
804 value = fields->f_r0;
805 break;
806 case LM32_OPERAND_R1 :
807 value = fields->f_r1;
808 break;
809 case LM32_OPERAND_R2 :
810 value = fields->f_r2;
811 break;
812 case LM32_OPERAND_SHIFT :
813 value = fields->f_shift;
814 break;
815 case LM32_OPERAND_UIMM :
816 value = fields->f_uimm;
817 break;
818 case LM32_OPERAND_USER :
819 value = fields->f_user;
820 break;
821
822 default :
823 /* xgettext:c-format */
824 fprintf (stderr, _("Unrecognized field %d while getting int operand.\n"),
825 opindex);
826 abort ();
827 }
828
829 return value;
830 }
831
832 bfd_vma
lm32_cgen_get_vma_operand(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,int opindex,const CGEN_FIELDS * fields)833 lm32_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
834 int opindex,
835 const CGEN_FIELDS * fields)
836 {
837 bfd_vma value;
838
839 switch (opindex)
840 {
841 case LM32_OPERAND_BRANCH :
842 value = fields->f_branch;
843 break;
844 case LM32_OPERAND_CALL :
845 value = fields->f_call;
846 break;
847 case LM32_OPERAND_CSR :
848 value = fields->f_csr;
849 break;
850 case LM32_OPERAND_EXCEPTION :
851 value = fields->f_exception;
852 break;
853 case LM32_OPERAND_GOT16 :
854 value = fields->f_imm;
855 break;
856 case LM32_OPERAND_GOTOFFHI16 :
857 value = fields->f_imm;
858 break;
859 case LM32_OPERAND_GOTOFFLO16 :
860 value = fields->f_imm;
861 break;
862 case LM32_OPERAND_GP16 :
863 value = fields->f_imm;
864 break;
865 case LM32_OPERAND_HI16 :
866 value = fields->f_uimm;
867 break;
868 case LM32_OPERAND_IMM :
869 value = fields->f_imm;
870 break;
871 case LM32_OPERAND_LO16 :
872 value = fields->f_uimm;
873 break;
874 case LM32_OPERAND_R0 :
875 value = fields->f_r0;
876 break;
877 case LM32_OPERAND_R1 :
878 value = fields->f_r1;
879 break;
880 case LM32_OPERAND_R2 :
881 value = fields->f_r2;
882 break;
883 case LM32_OPERAND_SHIFT :
884 value = fields->f_shift;
885 break;
886 case LM32_OPERAND_UIMM :
887 value = fields->f_uimm;
888 break;
889 case LM32_OPERAND_USER :
890 value = fields->f_user;
891 break;
892
893 default :
894 /* xgettext:c-format */
895 fprintf (stderr, _("Unrecognized field %d while getting vma operand.\n"),
896 opindex);
897 abort ();
898 }
899
900 return value;
901 }
902
903 void lm32_cgen_set_int_operand (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
904 void lm32_cgen_set_vma_operand (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
905
906 /* Stuffing values in cgen_fields is handled by a collection of functions.
907 They are distinguished by the type of the VALUE argument they accept.
908 TODO: floating point, inlining support, remove cases where argument type
909 not appropriate. */
910
911 void
lm32_cgen_set_int_operand(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,int opindex,CGEN_FIELDS * fields,int value)912 lm32_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
913 int opindex,
914 CGEN_FIELDS * fields,
915 int value)
916 {
917 switch (opindex)
918 {
919 case LM32_OPERAND_BRANCH :
920 fields->f_branch = value;
921 break;
922 case LM32_OPERAND_CALL :
923 fields->f_call = value;
924 break;
925 case LM32_OPERAND_CSR :
926 fields->f_csr = value;
927 break;
928 case LM32_OPERAND_EXCEPTION :
929 fields->f_exception = value;
930 break;
931 case LM32_OPERAND_GOT16 :
932 fields->f_imm = value;
933 break;
934 case LM32_OPERAND_GOTOFFHI16 :
935 fields->f_imm = value;
936 break;
937 case LM32_OPERAND_GOTOFFLO16 :
938 fields->f_imm = value;
939 break;
940 case LM32_OPERAND_GP16 :
941 fields->f_imm = value;
942 break;
943 case LM32_OPERAND_HI16 :
944 fields->f_uimm = value;
945 break;
946 case LM32_OPERAND_IMM :
947 fields->f_imm = value;
948 break;
949 case LM32_OPERAND_LO16 :
950 fields->f_uimm = value;
951 break;
952 case LM32_OPERAND_R0 :
953 fields->f_r0 = value;
954 break;
955 case LM32_OPERAND_R1 :
956 fields->f_r1 = value;
957 break;
958 case LM32_OPERAND_R2 :
959 fields->f_r2 = value;
960 break;
961 case LM32_OPERAND_SHIFT :
962 fields->f_shift = value;
963 break;
964 case LM32_OPERAND_UIMM :
965 fields->f_uimm = value;
966 break;
967 case LM32_OPERAND_USER :
968 fields->f_user = value;
969 break;
970
971 default :
972 /* xgettext:c-format */
973 fprintf (stderr, _("Unrecognized field %d while setting int operand.\n"),
974 opindex);
975 abort ();
976 }
977 }
978
979 void
lm32_cgen_set_vma_operand(CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,int opindex,CGEN_FIELDS * fields,bfd_vma value)980 lm32_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
981 int opindex,
982 CGEN_FIELDS * fields,
983 bfd_vma value)
984 {
985 switch (opindex)
986 {
987 case LM32_OPERAND_BRANCH :
988 fields->f_branch = value;
989 break;
990 case LM32_OPERAND_CALL :
991 fields->f_call = value;
992 break;
993 case LM32_OPERAND_CSR :
994 fields->f_csr = value;
995 break;
996 case LM32_OPERAND_EXCEPTION :
997 fields->f_exception = value;
998 break;
999 case LM32_OPERAND_GOT16 :
1000 fields->f_imm = value;
1001 break;
1002 case LM32_OPERAND_GOTOFFHI16 :
1003 fields->f_imm = value;
1004 break;
1005 case LM32_OPERAND_GOTOFFLO16 :
1006 fields->f_imm = value;
1007 break;
1008 case LM32_OPERAND_GP16 :
1009 fields->f_imm = value;
1010 break;
1011 case LM32_OPERAND_HI16 :
1012 fields->f_uimm = value;
1013 break;
1014 case LM32_OPERAND_IMM :
1015 fields->f_imm = value;
1016 break;
1017 case LM32_OPERAND_LO16 :
1018 fields->f_uimm = value;
1019 break;
1020 case LM32_OPERAND_R0 :
1021 fields->f_r0 = value;
1022 break;
1023 case LM32_OPERAND_R1 :
1024 fields->f_r1 = value;
1025 break;
1026 case LM32_OPERAND_R2 :
1027 fields->f_r2 = value;
1028 break;
1029 case LM32_OPERAND_SHIFT :
1030 fields->f_shift = value;
1031 break;
1032 case LM32_OPERAND_UIMM :
1033 fields->f_uimm = value;
1034 break;
1035 case LM32_OPERAND_USER :
1036 fields->f_user = value;
1037 break;
1038
1039 default :
1040 /* xgettext:c-format */
1041 fprintf (stderr, _("Unrecognized field %d while setting vma operand.\n"),
1042 opindex);
1043 abort ();
1044 }
1045 }
1046
1047 /* Function to call before using the instruction builder tables. */
1048
1049 void
lm32_cgen_init_ibld_table(CGEN_CPU_DESC cd)1050 lm32_cgen_init_ibld_table (CGEN_CPU_DESC cd)
1051 {
1052 cd->insert_handlers = & lm32_cgen_insert_handlers[0];
1053 cd->extract_handlers = & lm32_cgen_extract_handlers[0];
1054
1055 cd->insert_operand = lm32_cgen_insert_operand;
1056 cd->extract_operand = lm32_cgen_extract_operand;
1057
1058 cd->get_int_operand = lm32_cgen_get_int_operand;
1059 cd->set_int_operand = lm32_cgen_set_int_operand;
1060 cd->get_vma_operand = lm32_cgen_get_vma_operand;
1061 cd->set_vma_operand = lm32_cgen_set_vma_operand;
1062 }
1063