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_SIGN_OPT))
150 long minval = - (1L << (length - 1));
151 unsigned long maxval = mask;
153 if ((value > 0 && (unsigned long) value > maxval)
156 /* xgettext:c-format */
158 _("operand out of range (%ld not between %ld and %lu)"),
159 value, minval, maxval);
163 else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
165 unsigned long maxval = mask;
167 if ((unsigned long) value > maxval)
169 /* xgettext:c-format */
171 _("operand out of range (%lu not between 0 and %lu)"),
178 if (! cgen_signed_overflow_ok_p (cd))
180 long minval = - (1L << (length - 1));
181 long maxval = (1L << (length - 1)) - 1;
183 if (value < minval || value > maxval)
186 /* xgettext:c-format */
187 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
188 value, minval, maxval);
199 if (CGEN_INSN_LSB0_P)
200 shift = (word_offset + start + 1) - length;
202 shift = total_length - (word_offset + start + length);
203 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
206 #else /* ! CGEN_INT_INSN_P */
209 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
211 insert_1 (cd, value, start, length, word_length, bufp);
214 #endif /* ! CGEN_INT_INSN_P */
219 /* Default insn builder (insert handler).
220 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
221 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
222 recorded in host byte order, otherwise BUFFER is an array of bytes
223 and the value is recorded in target byte order).
224 The result is an error message or NULL if success. */
227 insert_insn_normal (cd, insn, fields, buffer, pc)
229 const CGEN_INSN * insn;
230 CGEN_FIELDS * fields;
231 CGEN_INSN_BYTES_PTR buffer;
234 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
236 const CGEN_SYNTAX_CHAR_TYPE * syn;
238 CGEN_INIT_INSERT (cd);
239 value = CGEN_INSN_BASE_VALUE (insn);
241 /* If we're recording insns as numbers (rather than a string of bytes),
242 target byte order handling is deferred until later. */
246 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
247 CGEN_FIELDS_BITSIZE (fields), value);
251 cgen_put_insn_value (cd, buffer, min (cd->base_insn_bitsize,
252 CGEN_FIELDS_BITSIZE (fields)),
255 #endif /* ! CGEN_INT_INSN_P */
257 /* ??? It would be better to scan the format's fields.
258 Still need to be able to insert a value based on the operand though;
259 e.g. storing a branch displacement that got resolved later.
260 Needs more thought first. */
262 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
266 if (CGEN_SYNTAX_CHAR_P (* syn))
269 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
278 /* Cover function to store an insn value into an integral insn. Must go here
279 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
282 put_insn_int_value (cd, buf, length, insn_length, value)
283 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED;
284 CGEN_INSN_BYTES_PTR buf;
289 /* For architectures with insns smaller than the base-insn-bitsize,
290 length may be too big. */
291 if (length > insn_length)
295 int shift = insn_length - length;
296 /* Written this way to avoid undefined behaviour. */
297 CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
298 *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
302 /* Operand extraction. */
304 #if ! CGEN_INT_INSN_P
306 /* Subroutine of extract_normal.
307 Ensure sufficient bytes are cached in EX_INFO.
308 OFFSET is the offset in bytes from the start of the insn of the value.
309 BYTES is the length of the needed value.
310 Returns 1 for success, 0 for failure. */
312 static CGEN_INLINE int
313 fill_cache (cd, ex_info, offset, bytes, pc)
315 CGEN_EXTRACT_INFO *ex_info;
319 /* It's doubtful that the middle part has already been fetched so
320 we don't optimize that case. kiss. */
322 disassemble_info *info = (disassemble_info *) ex_info->dis_info;
324 /* First do a quick check. */
325 mask = (1 << bytes) - 1;
326 if (((ex_info->valid >> offset) & mask) == mask)
329 /* Search for the first byte we need to read. */
330 for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
331 if (! (mask & ex_info->valid))
339 status = (*info->read_memory_func)
340 (pc, ex_info->insn_bytes + offset, bytes, info);
344 (*info->memory_error_func) (status, pc, info);
348 ex_info->valid |= ((1 << bytes) - 1) << offset;
354 /* Subroutine of extract_normal. */
356 static CGEN_INLINE long
357 extract_1 (cd, ex_info, start, length, word_length, bufp, pc)
359 CGEN_EXTRACT_INFO *ex_info;
360 int start,length,word_length;
366 int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
368 x = bfd_get_bits (bufp, word_length, big_p);
370 if (CGEN_INSN_LSB0_P)
371 shift = (start + 1) - length;
373 shift = (word_length - (start + length));
377 #endif /* ! CGEN_INT_INSN_P */
379 /* Default extraction routine.
381 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
382 or sometimes less for cases like the m32r where the base insn size is 32
383 but some insns are 16 bits.
384 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
385 but for generality we take a bitmask of all of them.
386 WORD_OFFSET is the offset in bits from the start of the insn of the value.
387 WORD_LENGTH is the length of the word in bits in which the value resides.
388 START is the starting bit number in the word, architecture origin.
389 LENGTH is the length of VALUE in bits.
390 TOTAL_LENGTH is the total length of the insn in bits.
392 Returns 1 for success, 0 for failure. */
394 /* ??? The return code isn't properly used. wip. */
396 /* ??? This doesn't handle bfd_vma's. Create another function when
400 extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length,
401 word_length, total_length, pc, valuep)
403 #if ! CGEN_INT_INSN_P
404 CGEN_EXTRACT_INFO *ex_info;
406 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED;
408 CGEN_INSN_INT insn_value;
410 unsigned int word_offset, start, length, word_length, total_length;
411 #if ! CGEN_INT_INSN_P
414 bfd_vma pc ATTRIBUTE_UNUSED;
418 CGEN_INSN_INT value, mask;
420 /* If LENGTH is zero, this operand doesn't contribute to the value
421 so give it a standard value of zero. */
434 if (word_length > 32)
437 /* For architectures with insns smaller than the insn-base-bitsize,
438 word_length may be too big. */
439 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
442 && word_length > total_length)
443 word_length = total_length;
446 /* Does the value reside in INSN_VALUE, and at the right alignment? */
448 if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
450 if (CGEN_INSN_LSB0_P)
451 value = insn_value >> ((word_offset + start + 1) - length);
453 value = insn_value >> (total_length - ( word_offset + start + length));
456 #if ! CGEN_INT_INSN_P
460 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
462 if (word_length > 32)
465 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
468 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
471 #endif /* ! CGEN_INT_INSN_P */
473 /* Written this way to avoid undefined behaviour. */
474 mask = (((1L << (length - 1)) - 1) << 1) | 1;
478 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
479 && (value & (1L << (length - 1))))
487 /* Default insn extractor.
489 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
490 The extracted fields are stored in FIELDS.
491 EX_INFO is used to handle reading variable length insns.
492 Return the length of the insn in bits, or 0 if no match,
493 or -1 if an error occurs fetching data (memory_error_func will have
497 extract_insn_normal (cd, insn, ex_info, insn_value, fields, pc)
499 const CGEN_INSN *insn;
500 CGEN_EXTRACT_INFO *ex_info;
501 CGEN_INSN_INT insn_value;
505 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
506 const CGEN_SYNTAX_CHAR_TYPE *syn;
508 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
510 CGEN_INIT_EXTRACT (cd);
512 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
516 if (CGEN_SYNTAX_CHAR_P (*syn))
519 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
520 ex_info, insn_value, fields, pc);
525 /* We recognized and successfully extracted this insn. */
526 return CGEN_INSN_BITSIZE (insn);
529 /* machine generated code added here */