1 /* Instruction building/extraction support for @arch@. -*- C -*-
3 THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
4 - the resultant file is machine generated, cgen-ibld.in isn't
6 Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
8 This file is part of the GNU Binutils and GDB, the GNU debugger.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software Foundation, Inc.,
22 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
24 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
33 #include "@prefix@-desc.h"
34 #include "@prefix@-opc.h"
36 #include "safe-ctype.h"
39 #define min(a,b) ((a) < (b) ? (a) : (b))
41 #define max(a,b) ((a) > (b) ? (a) : (b))
43 /* Used by the ifield rtx function. */
44 #define FLD(f) (fields->f)
46 static const char * insert_normal
47 (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
48 unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
49 static const char * insert_insn_normal
50 (CGEN_CPU_DESC, const CGEN_INSN *,
51 CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
52 static int extract_normal
53 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
54 unsigned int, unsigned int, unsigned int, unsigned int,
55 unsigned int, unsigned int, bfd_vma, long *);
56 static int extract_insn_normal
57 (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
58 CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
60 static void put_insn_int_value
61 (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
64 static CGEN_INLINE void insert_1
65 (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
66 static CGEN_INLINE int fill_cache
67 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, bfd_vma);
68 static CGEN_INLINE long extract_1
69 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
72 /* Operand insertion. */
76 /* Subroutine of insert_normal. */
78 static CGEN_INLINE void
79 insert_1 (CGEN_CPU_DESC cd,
89 x = cgen_get_insn_value (cd, bufp, word_length);
91 /* Written this way to avoid undefined behaviour. */
92 mask = (((1L << (length - 1)) - 1) << 1) | 1;
94 shift = (start + 1) - length;
96 shift = (word_length - (start + length));
97 x = (x & ~(mask << shift)) | ((value & mask) << shift);
99 cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
102 #endif /* ! CGEN_INT_INSN_P */
104 /* Default insertion routine.
106 ATTRS is a mask of the boolean attributes.
107 WORD_OFFSET is the offset in bits from the start of the insn of the value.
108 WORD_LENGTH is the length of the word in bits in which the value resides.
109 START is the starting bit number in the word, architecture origin.
110 LENGTH is the length of VALUE in bits.
111 TOTAL_LENGTH is the total length of the insn in bits.
113 The result is an error message or NULL if success. */
115 /* ??? This duplicates functionality with bfd's howto table and
116 bfd_install_relocation. */
117 /* ??? This doesn't handle bfd_vma's. Create another function when
121 insert_normal (CGEN_CPU_DESC cd,
124 unsigned int word_offset,
127 unsigned int word_length,
128 unsigned int total_length,
129 CGEN_INSN_BYTES_PTR buffer)
131 static char errbuf[100];
132 /* Written this way to avoid undefined behaviour. */
133 unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
135 /* If LENGTH is zero, this operand doesn't contribute to the value. */
145 if (word_length > 32)
148 /* For architectures with insns smaller than the base-insn-bitsize,
149 word_length may be too big. */
150 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
153 && word_length > total_length)
154 word_length = total_length;
157 /* Ensure VALUE will fit. */
158 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
160 long minval = - (1L << (length - 1));
161 unsigned long maxval = mask;
163 if ((value > 0 && (unsigned long) value > maxval)
166 /* xgettext:c-format */
168 _("operand out of range (%ld not between %ld and %lu)"),
169 value, minval, maxval);
173 else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
175 unsigned long maxval = mask;
177 if ((unsigned long) value > maxval)
179 /* xgettext:c-format */
181 _("operand out of range (%lu not between 0 and %lu)"),
188 if (! cgen_signed_overflow_ok_p (cd))
190 long minval = - (1L << (length - 1));
191 long maxval = (1L << (length - 1)) - 1;
193 if (value < minval || value > maxval)
196 /* xgettext:c-format */
197 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
198 value, minval, maxval);
209 if (CGEN_INSN_LSB0_P)
210 shift = (word_offset + start + 1) - length;
212 shift = total_length - (word_offset + start + length);
213 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
216 #else /* ! CGEN_INT_INSN_P */
219 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
221 insert_1 (cd, value, start, length, word_length, bufp);
224 #endif /* ! CGEN_INT_INSN_P */
229 /* Default insn builder (insert handler).
230 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
231 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
232 recorded in host byte order, otherwise BUFFER is an array of bytes
233 and the value is recorded in target byte order).
234 The result is an error message or NULL if success. */
237 insert_insn_normal (CGEN_CPU_DESC cd,
238 const CGEN_INSN * insn,
239 CGEN_FIELDS * fields,
240 CGEN_INSN_BYTES_PTR buffer,
243 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
245 const CGEN_SYNTAX_CHAR_TYPE * syn;
247 CGEN_INIT_INSERT (cd);
248 value = CGEN_INSN_BASE_VALUE (insn);
250 /* If we're recording insns as numbers (rather than a string of bytes),
251 target byte order handling is deferred until later. */
255 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
256 CGEN_FIELDS_BITSIZE (fields), value);
260 cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
261 (unsigned) CGEN_FIELDS_BITSIZE (fields)),
264 #endif /* ! CGEN_INT_INSN_P */
266 /* ??? It would be better to scan the format's fields.
267 Still need to be able to insert a value based on the operand though;
268 e.g. storing a branch displacement that got resolved later.
269 Needs more thought first. */
271 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
275 if (CGEN_SYNTAX_CHAR_P (* syn))
278 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
288 /* Cover function to store an insn value into an integral insn. Must go here
289 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
292 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
293 CGEN_INSN_BYTES_PTR buf,
298 /* For architectures with insns smaller than the base-insn-bitsize,
299 length may be too big. */
300 if (length > insn_length)
304 int shift = insn_length - length;
305 /* Written this way to avoid undefined behaviour. */
306 CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
307 *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
312 /* Operand extraction. */
314 #if ! CGEN_INT_INSN_P
316 /* Subroutine of extract_normal.
317 Ensure sufficient bytes are cached in EX_INFO.
318 OFFSET is the offset in bytes from the start of the insn of the value.
319 BYTES is the length of the needed value.
320 Returns 1 for success, 0 for failure. */
322 static CGEN_INLINE int
323 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
324 CGEN_EXTRACT_INFO *ex_info,
329 /* It's doubtful that the middle part has already been fetched so
330 we don't optimize that case. kiss. */
332 disassemble_info *info = (disassemble_info *) ex_info->dis_info;
334 /* First do a quick check. */
335 mask = (1 << bytes) - 1;
336 if (((ex_info->valid >> offset) & mask) == mask)
339 /* Search for the first byte we need to read. */
340 for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
341 if (! (mask & ex_info->valid))
349 status = (*info->read_memory_func)
350 (pc, ex_info->insn_bytes + offset, bytes, info);
354 (*info->memory_error_func) (status, pc, info);
358 ex_info->valid |= ((1 << bytes) - 1) << offset;
364 /* Subroutine of extract_normal. */
366 static CGEN_INLINE long
367 extract_1 (CGEN_CPU_DESC cd,
368 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
373 bfd_vma pc ATTRIBUTE_UNUSED)
378 int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
380 x = cgen_get_insn_value (cd, bufp, word_length);
382 if (CGEN_INSN_LSB0_P)
383 shift = (start + 1) - length;
385 shift = (word_length - (start + length));
389 #endif /* ! CGEN_INT_INSN_P */
391 /* Default extraction routine.
393 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
394 or sometimes less for cases like the m32r where the base insn size is 32
395 but some insns are 16 bits.
396 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
397 but for generality we take a bitmask of all of them.
398 WORD_OFFSET is the offset in bits from the start of the insn of the value.
399 WORD_LENGTH is the length of the word in bits in which the value resides.
400 START is the starting bit number in the word, architecture origin.
401 LENGTH is the length of VALUE in bits.
402 TOTAL_LENGTH is the total length of the insn in bits.
404 Returns 1 for success, 0 for failure. */
406 /* ??? The return code isn't properly used. wip. */
408 /* ??? This doesn't handle bfd_vma's. Create another function when
412 extract_normal (CGEN_CPU_DESC cd,
413 #if ! CGEN_INT_INSN_P
414 CGEN_EXTRACT_INFO *ex_info,
416 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
418 CGEN_INSN_INT insn_value,
420 unsigned int word_offset,
423 unsigned int word_length,
424 unsigned int total_length,
425 #if ! CGEN_INT_INSN_P
428 bfd_vma pc ATTRIBUTE_UNUSED,
434 /* If LENGTH is zero, this operand doesn't contribute to the value
435 so give it a standard value of zero. */
448 if (word_length > 32)
451 /* For architectures with insns smaller than the insn-base-bitsize,
452 word_length may be too big. */
453 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
456 && word_length > total_length)
457 word_length = total_length;
460 /* Does the value reside in INSN_VALUE, and at the right alignment? */
462 if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
464 if (CGEN_INSN_LSB0_P)
465 value = insn_value >> ((word_offset + start + 1) - length);
467 value = insn_value >> (total_length - ( word_offset + start + length));
470 #if ! CGEN_INT_INSN_P
474 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
476 if (word_length > 32)
479 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
482 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
485 #endif /* ! CGEN_INT_INSN_P */
487 /* Written this way to avoid undefined behaviour. */
488 mask = (((1L << (length - 1)) - 1) << 1) | 1;
492 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
493 && (value & (1L << (length - 1))))
501 /* Default insn extractor.
503 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
504 The extracted fields are stored in FIELDS.
505 EX_INFO is used to handle reading variable length insns.
506 Return the length of the insn in bits, or 0 if no match,
507 or -1 if an error occurs fetching data (memory_error_func will have
511 extract_insn_normal (CGEN_CPU_DESC cd,
512 const CGEN_INSN *insn,
513 CGEN_EXTRACT_INFO *ex_info,
514 CGEN_INSN_INT insn_value,
518 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
519 const CGEN_SYNTAX_CHAR_TYPE *syn;
521 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
523 CGEN_INIT_EXTRACT (cd);
525 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
529 if (CGEN_SYNTAX_CHAR_P (*syn))
532 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
533 ex_info, insn_value, fields, pc);
538 /* We recognized and successfully extracted this insn. */
539 return CGEN_INSN_BITSIZE (insn);
542 /* machine generated code added here */