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 (C) 1996-2018 Free Software Foundation, Inc.
8 This file is part of libopcodes.
10 This library 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 3, or (at your option)
15 It is distributed in the hope that it will be useful, but WITHOUT
16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
17 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
18 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"
35 #include "cgen/basic-modes.h"
37 #include "safe-ctype.h"
40 #define min(a,b) ((a) < (b) ? (a) : (b))
42 #define max(a,b) ((a) > (b) ? (a) : (b))
44 /* Used by the ifield rtx function. */
45 #define FLD(f) (fields->f)
47 static const char * insert_normal
48 (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
49 unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
50 static const char * insert_insn_normal
51 (CGEN_CPU_DESC, const CGEN_INSN *,
52 CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
53 static int extract_normal
54 (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 (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
59 CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
61 static void put_insn_int_value
62 (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
65 static CGEN_INLINE void insert_1
66 (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
67 static CGEN_INLINE int fill_cache
68 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, bfd_vma);
69 static CGEN_INLINE long extract_1
70 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
73 /* Operand insertion. */
77 /* Subroutine of insert_normal. */
79 static CGEN_INLINE void
80 insert_1 (CGEN_CPU_DESC cd,
90 x = cgen_get_insn_value (cd, bufp, word_length);
92 /* Written this way to avoid undefined behaviour. */
93 mask = (((1L << (length - 1)) - 1) << 1) | 1;
95 shift = (start + 1) - length;
97 shift = (word_length - (start + length));
98 x = (x & ~(mask << shift)) | ((value & mask) << shift);
100 cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
103 #endif /* ! CGEN_INT_INSN_P */
105 /* Default insertion routine.
107 ATTRS is a mask of the boolean attributes.
108 WORD_OFFSET is the offset in bits from the start of the insn of the value.
109 WORD_LENGTH is the length of the word in bits in which the value resides.
110 START is the starting bit number in the word, architecture origin.
111 LENGTH is the length of VALUE in bits.
112 TOTAL_LENGTH is the total length of the insn in bits.
114 The result is an error message or NULL if success. */
116 /* ??? This duplicates functionality with bfd's howto table and
117 bfd_install_relocation. */
118 /* ??? This doesn't handle bfd_vma's. Create another function when
122 insert_normal (CGEN_CPU_DESC cd,
125 unsigned int word_offset,
128 unsigned int word_length,
129 unsigned int total_length,
130 CGEN_INSN_BYTES_PTR buffer)
132 static char errbuf[100];
133 /* Written this way to avoid undefined behaviour. */
134 unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
136 /* If LENGTH is zero, this operand doesn't contribute to the value. */
140 if (word_length > 8 * sizeof (CGEN_INSN_INT))
143 /* For architectures with insns smaller than the base-insn-bitsize,
144 word_length may be too big. */
145 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
148 && word_length > total_length)
149 word_length = total_length;
152 /* Ensure VALUE will fit. */
153 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
155 long minval = - (1L << (length - 1));
156 unsigned long maxval = mask;
158 if ((value > 0 && (unsigned long) value > maxval)
161 /* xgettext:c-format */
163 _("operand out of range (%ld not between %ld and %lu)"),
164 value, minval, maxval);
168 else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
170 unsigned long maxval = mask;
171 unsigned long val = (unsigned long) value;
173 /* For hosts with a word size > 32 check to see if value has been sign
174 extended beyond 32 bits. If so then ignore these higher sign bits
175 as the user is attempting to store a 32-bit signed value into an
176 unsigned 32-bit field which is allowed. */
177 if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
182 /* xgettext:c-format */
184 _("operand out of range (0x%lx not between 0 and 0x%lx)"),
191 if (! cgen_signed_overflow_ok_p (cd))
193 long minval = - (1L << (length - 1));
194 long maxval = (1L << (length - 1)) - 1;
196 if (value < minval || value > maxval)
199 /* xgettext:c-format */
200 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
201 value, minval, maxval);
210 int shift_within_word, shift_to_word, shift;
212 /* How to shift the value to BIT0 of the word. */
213 shift_to_word = total_length - (word_offset + word_length);
215 /* How to shift the value to the field within the word. */
216 if (CGEN_INSN_LSB0_P)
217 shift_within_word = start + 1 - length;
219 shift_within_word = word_length - start - length;
221 /* The total SHIFT, then mask in the value. */
222 shift = shift_to_word + shift_within_word;
223 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
226 #else /* ! CGEN_INT_INSN_P */
229 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
231 insert_1 (cd, value, start, length, word_length, bufp);
234 #endif /* ! CGEN_INT_INSN_P */
239 /* Default insn builder (insert handler).
240 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
241 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
242 recorded in host byte order, otherwise BUFFER is an array of bytes
243 and the value is recorded in target byte order).
244 The result is an error message or NULL if success. */
247 insert_insn_normal (CGEN_CPU_DESC cd,
248 const CGEN_INSN * insn,
249 CGEN_FIELDS * fields,
250 CGEN_INSN_BYTES_PTR buffer,
253 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
255 const CGEN_SYNTAX_CHAR_TYPE * syn;
257 CGEN_INIT_INSERT (cd);
258 value = CGEN_INSN_BASE_VALUE (insn);
260 /* If we're recording insns as numbers (rather than a string of bytes),
261 target byte order handling is deferred until later. */
265 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
266 CGEN_FIELDS_BITSIZE (fields), value);
270 cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
271 (unsigned) CGEN_FIELDS_BITSIZE (fields)),
274 #endif /* ! CGEN_INT_INSN_P */
276 /* ??? It would be better to scan the format's fields.
277 Still need to be able to insert a value based on the operand though;
278 e.g. storing a branch displacement that got resolved later.
279 Needs more thought first. */
281 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
285 if (CGEN_SYNTAX_CHAR_P (* syn))
288 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
298 /* Cover function to store an insn value into an integral insn. Must go here
299 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
302 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
303 CGEN_INSN_BYTES_PTR buf,
308 /* For architectures with insns smaller than the base-insn-bitsize,
309 length may be too big. */
310 if (length > insn_length)
314 int shift = insn_length - length;
315 /* Written this way to avoid undefined behaviour. */
316 CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
318 *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
323 /* Operand extraction. */
325 #if ! CGEN_INT_INSN_P
327 /* Subroutine of extract_normal.
328 Ensure sufficient bytes are cached in EX_INFO.
329 OFFSET is the offset in bytes from the start of the insn of the value.
330 BYTES is the length of the needed value.
331 Returns 1 for success, 0 for failure. */
333 static CGEN_INLINE int
334 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
335 CGEN_EXTRACT_INFO *ex_info,
340 /* It's doubtful that the middle part has already been fetched so
341 we don't optimize that case. kiss. */
343 disassemble_info *info = (disassemble_info *) ex_info->dis_info;
345 /* First do a quick check. */
346 mask = (1 << bytes) - 1;
347 if (((ex_info->valid >> offset) & mask) == mask)
350 /* Search for the first byte we need to read. */
351 for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
352 if (! (mask & ex_info->valid))
360 status = (*info->read_memory_func)
361 (pc, ex_info->insn_bytes + offset, bytes, info);
365 (*info->memory_error_func) (status, pc, info);
369 ex_info->valid |= ((1 << bytes) - 1) << offset;
375 /* Subroutine of extract_normal. */
377 static CGEN_INLINE long
378 extract_1 (CGEN_CPU_DESC cd,
379 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
384 bfd_vma pc ATTRIBUTE_UNUSED)
389 x = cgen_get_insn_value (cd, bufp, word_length);
391 if (CGEN_INSN_LSB0_P)
392 shift = (start + 1) - length;
394 shift = (word_length - (start + length));
398 #endif /* ! CGEN_INT_INSN_P */
400 /* Default extraction routine.
402 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
403 or sometimes less for cases like the m32r where the base insn size is 32
404 but some insns are 16 bits.
405 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
406 but for generality we take a bitmask of all of them.
407 WORD_OFFSET is the offset in bits from the start of the insn of the value.
408 WORD_LENGTH is the length of the word in bits in which the value resides.
409 START is the starting bit number in the word, architecture origin.
410 LENGTH is the length of VALUE in bits.
411 TOTAL_LENGTH is the total length of the insn in bits.
413 Returns 1 for success, 0 for failure. */
415 /* ??? The return code isn't properly used. wip. */
417 /* ??? This doesn't handle bfd_vma's. Create another function when
421 extract_normal (CGEN_CPU_DESC cd,
422 #if ! CGEN_INT_INSN_P
423 CGEN_EXTRACT_INFO *ex_info,
425 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
427 CGEN_INSN_INT insn_value,
429 unsigned int word_offset,
432 unsigned int word_length,
433 unsigned int total_length,
434 #if ! CGEN_INT_INSN_P
437 bfd_vma pc ATTRIBUTE_UNUSED,
443 /* If LENGTH is zero, this operand doesn't contribute to the value
444 so give it a standard value of zero. */
451 if (word_length > 8 * sizeof (CGEN_INSN_INT))
454 /* For architectures with insns smaller than the insn-base-bitsize,
455 word_length may be too big. */
456 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
458 if (word_offset + word_length > total_length)
459 word_length = total_length - word_offset;
462 /* Does the value reside in INSN_VALUE, and at the right alignment? */
464 if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
466 if (CGEN_INSN_LSB0_P)
467 value = insn_value >> ((word_offset + start + 1) - length);
469 value = insn_value >> (total_length - ( word_offset + start + length));
472 #if ! CGEN_INT_INSN_P
476 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
478 if (word_length > 8 * sizeof (CGEN_INSN_INT))
481 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
484 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
487 #endif /* ! CGEN_INT_INSN_P */
489 /* Written this way to avoid undefined behaviour. */
490 mask = (((1L << (length - 1)) - 1) << 1) | 1;
494 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
495 && (value & (1L << (length - 1))))
503 /* Default insn extractor.
505 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
506 The extracted fields are stored in FIELDS.
507 EX_INFO is used to handle reading variable length insns.
508 Return the length of the insn in bits, or 0 if no match,
509 or -1 if an error occurs fetching data (memory_error_func will have
513 extract_insn_normal (CGEN_CPU_DESC cd,
514 const CGEN_INSN *insn,
515 CGEN_EXTRACT_INFO *ex_info,
516 CGEN_INSN_INT insn_value,
520 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
521 const CGEN_SYNTAX_CHAR_TYPE *syn;
523 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
525 CGEN_INIT_EXTRACT (cd);
527 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
531 if (CGEN_SYNTAX_CHAR_P (*syn))
534 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
535 ex_info, insn_value, fields, pc);
540 /* We recognized and successfully extracted this insn. */
541 return CGEN_INSN_BITSIZE (insn);
544 /* Machine generated code added here. */