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 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 PARAMS ((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 PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *,
51 CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma));
52 static int extract_normal
53 PARAMS ((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 PARAMS ((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 PARAMS ((CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT));
64 static CGEN_INLINE void insert_1
65 PARAMS ((CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *));
66 static CGEN_INLINE int fill_cache
67 PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, bfd_vma));
68 static CGEN_INLINE long extract_1
69 PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int,
70 unsigned char *, bfd_vma));
73 /* Operand insertion. */
77 /* Subroutine of insert_normal. */
79 static CGEN_INLINE void
80 insert_1 (cd, value, start, length, word_length, bufp)
83 int start,length,word_length;
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 (cd, value, attrs, word_offset, start, length, word_length,
122 total_length, buffer)
126 unsigned int word_offset, start, length, word_length, total_length;
127 CGEN_INSN_BYTES_PTR buffer;
129 static char errbuf[100];
130 /* Written this way to avoid undefined behaviour. */
131 unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
133 /* If LENGTH is zero, this operand doesn't contribute to the value. */
143 if (word_length > 32)
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)
151 && word_length > total_length)
152 word_length = total_length;
155 /* Ensure VALUE will fit. */
156 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
158 long minval = - (1L << (length - 1));
159 unsigned long maxval = mask;
161 if ((value > 0 && (unsigned long) value > maxval)
164 /* xgettext:c-format */
166 _("operand out of range (%ld not between %ld and %lu)"),
167 value, minval, maxval);
171 else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
173 unsigned long maxval = mask;
175 if ((unsigned long) value > maxval)
177 /* xgettext:c-format */
179 _("operand out of range (%lu not between 0 and %lu)"),
186 if (! cgen_signed_overflow_ok_p (cd))
188 long minval = - (1L << (length - 1));
189 long maxval = (1L << (length - 1)) - 1;
191 if (value < minval || value > maxval)
194 /* xgettext:c-format */
195 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
196 value, minval, maxval);
207 if (CGEN_INSN_LSB0_P)
208 shift = (word_offset + start + 1) - length;
210 shift = total_length - (word_offset + start + length);
211 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
214 #else /* ! CGEN_INT_INSN_P */
217 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
219 insert_1 (cd, value, start, length, word_length, bufp);
222 #endif /* ! CGEN_INT_INSN_P */
227 /* Default insn builder (insert handler).
228 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
229 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
230 recorded in host byte order, otherwise BUFFER is an array of bytes
231 and the value is recorded in target byte order).
232 The result is an error message or NULL if success. */
235 insert_insn_normal (cd, insn, fields, buffer, pc)
237 const CGEN_INSN * insn;
238 CGEN_FIELDS * fields;
239 CGEN_INSN_BYTES_PTR buffer;
242 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
244 const CGEN_SYNTAX_CHAR_TYPE * syn;
246 CGEN_INIT_INSERT (cd);
247 value = CGEN_INSN_BASE_VALUE (insn);
249 /* If we're recording insns as numbers (rather than a string of bytes),
250 target byte order handling is deferred until later. */
254 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
255 CGEN_FIELDS_BITSIZE (fields), value);
259 cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
260 (unsigned) CGEN_FIELDS_BITSIZE (fields)),
263 #endif /* ! CGEN_INT_INSN_P */
265 /* ??? It would be better to scan the format's fields.
266 Still need to be able to insert a value based on the operand though;
267 e.g. storing a branch displacement that got resolved later.
268 Needs more thought first. */
270 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
274 if (CGEN_SYNTAX_CHAR_P (* syn))
277 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
287 /* Cover function to store an insn value into an integral insn. Must go here
288 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
291 put_insn_int_value (cd, buf, length, insn_length, value)
292 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 (cd, ex_info, offset, bytes, pc)
324 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
325 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 (cd, ex_info, start, length, word_length, bufp, pc)
369 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED;
370 int start,length,word_length;
372 bfd_vma pc ATTRIBUTE_UNUSED;
377 int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
379 x = cgen_get_insn_value (cd, bufp, word_length);
381 if (CGEN_INSN_LSB0_P)
382 shift = (start + 1) - length;
384 shift = (word_length - (start + length));
388 #endif /* ! CGEN_INT_INSN_P */
390 /* Default extraction routine.
392 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
393 or sometimes less for cases like the m32r where the base insn size is 32
394 but some insns are 16 bits.
395 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
396 but for generality we take a bitmask of all of them.
397 WORD_OFFSET is the offset in bits from the start of the insn of the value.
398 WORD_LENGTH is the length of the word in bits in which the value resides.
399 START is the starting bit number in the word, architecture origin.
400 LENGTH is the length of VALUE in bits.
401 TOTAL_LENGTH is the total length of the insn in bits.
403 Returns 1 for success, 0 for failure. */
405 /* ??? The return code isn't properly used. wip. */
407 /* ??? This doesn't handle bfd_vma's. Create another function when
411 extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length,
412 word_length, total_length, pc, valuep)
414 #if ! CGEN_INT_INSN_P
415 CGEN_EXTRACT_INFO *ex_info;
417 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED;
419 CGEN_INSN_INT insn_value;
421 unsigned int word_offset, start, length, word_length, total_length;
422 #if ! CGEN_INT_INSN_P
425 bfd_vma pc ATTRIBUTE_UNUSED;
431 /* If LENGTH is zero, this operand doesn't contribute to the value
432 so give it a standard value of zero. */
445 if (word_length > 32)
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)
453 && word_length > total_length)
454 word_length = total_length;
457 /* Does the value reside in INSN_VALUE, and at the right alignment? */
459 if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
461 if (CGEN_INSN_LSB0_P)
462 value = insn_value >> ((word_offset + start + 1) - length);
464 value = insn_value >> (total_length - ( word_offset + start + length));
467 #if ! CGEN_INT_INSN_P
471 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
473 if (word_length > 32)
476 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
479 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
482 #endif /* ! CGEN_INT_INSN_P */
484 /* Written this way to avoid undefined behaviour. */
485 mask = (((1L << (length - 1)) - 1) << 1) | 1;
489 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
490 && (value & (1L << (length - 1))))
498 /* Default insn extractor.
500 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
501 The extracted fields are stored in FIELDS.
502 EX_INFO is used to handle reading variable length insns.
503 Return the length of the insn in bits, or 0 if no match,
504 or -1 if an error occurs fetching data (memory_error_func will have
508 extract_insn_normal (cd, insn, ex_info, insn_value, fields, pc)
510 const CGEN_INSN *insn;
511 CGEN_EXTRACT_INFO *ex_info;
512 CGEN_INSN_INT insn_value;
516 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
517 const CGEN_SYNTAX_CHAR_TYPE *syn;
519 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
521 CGEN_INIT_EXTRACT (cd);
523 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
527 if (CGEN_SYNTAX_CHAR_P (*syn))
530 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
531 ex_info, insn_value, fields, pc);
536 /* We recognized and successfully extracted this insn. */
537 return CGEN_INSN_BITSIZE (insn);
540 /* machine generated code added here */