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.
34 #include "@prefix@-desc.h"
35 #include "@prefix@-opc.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));
53 static int extract_normal
54 PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
55 unsigned int, unsigned int, unsigned int, unsigned int,
56 unsigned int, unsigned int, bfd_vma, long *));
57 static int extract_insn_normal
58 PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
59 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 /* Operand insertion. */
68 /* Subroutine of insert_normal. */
70 static CGEN_INLINE void
71 insert_1 (cd, value, start, length, word_length, bufp)
74 int start,length,word_length;
79 int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
81 x = bfd_get_bits (bufp, word_length, big_p);
83 /* Written this way to avoid undefined behaviour. */
84 mask = (((1L << (length - 1)) - 1) << 1) | 1;
86 shift = (start + 1) - length;
88 shift = (word_length - (start + length));
89 x = (x & ~(mask << shift)) | ((value & mask) << shift);
91 bfd_put_bits ((bfd_vma) x, bufp, word_length, big_p);
94 #endif /* ! CGEN_INT_INSN_P */
96 /* Default insertion routine.
98 ATTRS is a mask of the boolean attributes.
99 WORD_OFFSET is the offset in bits from the start of the insn of the value.
100 WORD_LENGTH is the length of the word in bits in which the value resides.
101 START is the starting bit number in the word, architecture origin.
102 LENGTH is the length of VALUE in bits.
103 TOTAL_LENGTH is the total length of the insn in bits.
105 The result is an error message or NULL if success. */
107 /* ??? This duplicates functionality with bfd's howto table and
108 bfd_install_relocation. */
109 /* ??? This doesn't handle bfd_vma's. Create another function when
113 insert_normal (cd, value, attrs, word_offset, start, length, word_length,
114 total_length, buffer)
118 unsigned int word_offset, start, length, word_length, total_length;
119 CGEN_INSN_BYTES_PTR buffer;
121 static char errbuf[100];
122 /* Written this way to avoid undefined behaviour. */
123 unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
125 /* If LENGTH is zero, this operand doesn't contribute to the value. */
135 if (word_length > 32)
138 /* For architectures with insns smaller than the base-insn-bitsize,
139 word_length may be too big. */
140 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
143 && word_length > total_length)
144 word_length = total_length;
147 /* Ensure VALUE will fit. */
148 if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
150 unsigned long maxval = mask;
152 if ((unsigned long) value > maxval)
154 /* xgettext:c-format */
156 _("operand out of range (%lu not between 0 and %lu)"),
163 if (! cgen_signed_overflow_ok_p (cd))
165 long minval = - (1L << (length - 1));
166 long maxval = (1L << (length - 1)) - 1;
168 if (value < minval || value > maxval)
171 /* xgettext:c-format */
172 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
173 value, minval, maxval);
184 if (CGEN_INSN_LSB0_P)
185 shift = (word_offset + start + 1) - length;
187 shift = total_length - (word_offset + start + length);
188 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
191 #else /* ! CGEN_INT_INSN_P */
194 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
196 insert_1 (cd, value, start, length, word_length, bufp);
199 #endif /* ! CGEN_INT_INSN_P */
204 /* Default insn builder (insert handler).
205 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
206 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
207 recorded in host byte order, otherwise BUFFER is an array of bytes
208 and the value is recorded in target byte order).
209 The result is an error message or NULL if success. */
212 insert_insn_normal (cd, insn, fields, buffer, pc)
214 const CGEN_INSN * insn;
215 CGEN_FIELDS * fields;
216 CGEN_INSN_BYTES_PTR buffer;
219 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
221 const CGEN_SYNTAX_CHAR_TYPE * syn;
223 CGEN_INIT_INSERT (cd);
224 value = CGEN_INSN_BASE_VALUE (insn);
226 /* If we're recording insns as numbers (rather than a string of bytes),
227 target byte order handling is deferred until later. */
231 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
232 CGEN_FIELDS_BITSIZE (fields), value);
236 cgen_put_insn_value (cd, buffer, min (cd->base_insn_bitsize,
237 CGEN_FIELDS_BITSIZE (fields)),
240 #endif /* ! CGEN_INT_INSN_P */
242 /* ??? It would be better to scan the format's fields.
243 Still need to be able to insert a value based on the operand though;
244 e.g. storing a branch displacement that got resolved later.
245 Needs more thought first. */
247 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
251 if (CGEN_SYNTAX_CHAR_P (* syn))
254 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
263 /* Cover function to store an insn value into an integral insn. Must go here
264 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
267 put_insn_int_value (cd, buf, length, insn_length, value)
268 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
269 CGEN_INSN_BYTES_PTR buf;
274 /* For architectures with insns smaller than the base-insn-bitsize,
275 length may be too big. */
276 if (length > insn_length)
280 int shift = insn_length - length;
281 /* Written this way to avoid undefined behaviour. */
282 CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
283 *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
287 /* Operand extraction. */
289 #if ! CGEN_INT_INSN_P
291 /* Subroutine of extract_normal.
292 Ensure sufficient bytes are cached in EX_INFO.
293 OFFSET is the offset in bytes from the start of the insn of the value.
294 BYTES is the length of the needed value.
295 Returns 1 for success, 0 for failure. */
297 static CGEN_INLINE int
298 fill_cache (cd, ex_info, offset, bytes, pc)
300 CGEN_EXTRACT_INFO *ex_info;
304 /* It's doubtful that the middle part has already been fetched so
305 we don't optimize that case. kiss. */
307 disassemble_info *info = (disassemble_info *) ex_info->dis_info;
309 /* First do a quick check. */
310 mask = (1 << bytes) - 1;
311 if (((ex_info->valid >> offset) & mask) == mask)
314 /* Search for the first byte we need to read. */
315 for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
316 if (! (mask & ex_info->valid))
324 status = (*info->read_memory_func)
325 (pc, ex_info->insn_bytes + offset, bytes, info);
329 (*info->memory_error_func) (status, pc, info);
333 ex_info->valid |= ((1 << bytes) - 1) << offset;
339 /* Subroutine of extract_normal. */
341 static CGEN_INLINE long
342 extract_1 (cd, ex_info, start, length, word_length, bufp, pc)
344 CGEN_EXTRACT_INFO *ex_info;
345 int start,length,word_length;
351 int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
353 x = bfd_get_bits (bufp, word_length, big_p);
355 if (CGEN_INSN_LSB0_P)
356 shift = (start + 1) - length;
358 shift = (word_length - (start + length));
362 #endif /* ! CGEN_INT_INSN_P */
364 /* Default extraction routine.
366 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
367 or sometimes less for cases like the m32r where the base insn size is 32
368 but some insns are 16 bits.
369 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
370 but for generality we take a bitmask of all of them.
371 WORD_OFFSET is the offset in bits from the start of the insn of the value.
372 WORD_LENGTH is the length of the word in bits in which the value resides.
373 START is the starting bit number in the word, architecture origin.
374 LENGTH is the length of VALUE in bits.
375 TOTAL_LENGTH is the total length of the insn in bits.
377 Returns 1 for success, 0 for failure. */
379 /* ??? The return code isn't properly used. wip. */
381 /* ??? This doesn't handle bfd_vma's. Create another function when
385 extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length,
386 word_length, total_length, pc, valuep)
388 #if ! CGEN_INT_INSN_P
389 CGEN_EXTRACT_INFO *ex_info;
391 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED;
393 CGEN_INSN_INT insn_value;
395 unsigned int word_offset, start, length, word_length, total_length;
396 #if ! CGEN_INT_INSN_P
399 bfd_vma pc ATTRIBUTE_UNUSED;
403 CGEN_INSN_INT value, mask;
405 /* If LENGTH is zero, this operand doesn't contribute to the value
406 so give it a standard value of zero. */
419 if (word_length > 32)
422 /* For architectures with insns smaller than the insn-base-bitsize,
423 word_length may be too big. */
424 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
427 && word_length > total_length)
428 word_length = total_length;
431 /* Does the value reside in INSN_VALUE? */
433 if (CGEN_INT_INSN_P || word_offset == 0)
435 if (CGEN_INSN_LSB0_P)
436 value = insn_value >> ((word_offset + start + 1) - length);
438 value = insn_value >> (total_length - ( word_offset + start + length));
441 #if ! CGEN_INT_INSN_P
445 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
447 if (word_length > 32)
450 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
453 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
456 #endif /* ! CGEN_INT_INSN_P */
458 /* Written this way to avoid undefined behaviour. */
459 mask = (((1L << (length - 1)) - 1) << 1) | 1;
463 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
464 && (value & (1L << (length - 1))))
472 /* Default insn extractor.
474 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
475 The extracted fields are stored in FIELDS.
476 EX_INFO is used to handle reading variable length insns.
477 Return the length of the insn in bits, or 0 if no match,
478 or -1 if an error occurs fetching data (memory_error_func will have
482 extract_insn_normal (cd, insn, ex_info, insn_value, fields, pc)
484 const CGEN_INSN *insn;
485 CGEN_EXTRACT_INFO *ex_info;
486 CGEN_INSN_INT insn_value;
490 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
491 const CGEN_SYNTAX_CHAR_TYPE *syn;
493 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
495 CGEN_INIT_EXTRACT (cd);
497 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
501 if (CGEN_SYNTAX_CHAR_P (*syn))
504 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
505 ex_info, insn_value, fields, pc);
510 /* We recognized and successfully extracted this insn. */
511 return CGEN_INSN_BITSIZE (insn);
514 /* machine generated code added here */