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, 2005, 2006, 2007,
7 2008, 2010 Free Software Foundation, Inc.
9 This file is part of libopcodes.
11 This library is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3, or (at your option)
16 It is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation, Inc.,
23 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
34 #include "@prefix@-desc.h"
35 #include "@prefix@-opc.h"
36 #include "cgen/basic-modes.h"
38 #include "safe-ctype.h"
41 #define min(a,b) ((a) < (b) ? (a) : (b))
43 #define max(a,b) ((a) > (b) ? (a) : (b))
45 /* Used by the ifield rtx function. */
46 #define FLD(f) (fields->f)
48 static const char * insert_normal
49 (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
50 unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
51 static const char * insert_insn_normal
52 (CGEN_CPU_DESC, const CGEN_INSN *,
53 CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
54 static int extract_normal
55 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
56 unsigned int, unsigned int, unsigned int, unsigned int,
57 unsigned int, unsigned int, bfd_vma, long *);
58 static int extract_insn_normal
59 (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
60 CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
62 static void put_insn_int_value
63 (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
66 static CGEN_INLINE void insert_1
67 (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
68 static CGEN_INLINE int fill_cache
69 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, bfd_vma);
70 static CGEN_INLINE long extract_1
71 (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
74 /* Operand insertion. */
78 /* Subroutine of insert_normal. */
80 static CGEN_INLINE void
81 insert_1 (CGEN_CPU_DESC cd,
91 x = cgen_get_insn_value (cd, bufp, word_length);
93 /* Written this way to avoid undefined behaviour. */
94 mask = (((1L << (length - 1)) - 1) << 1) | 1;
96 shift = (start + 1) - length;
98 shift = (word_length - (start + length));
99 x = (x & ~(mask << shift)) | ((value & mask) << shift);
101 cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
104 #endif /* ! CGEN_INT_INSN_P */
106 /* Default insertion routine.
108 ATTRS is a mask of the boolean attributes.
109 WORD_OFFSET is the offset in bits from the start of the insn of the value.
110 WORD_LENGTH is the length of the word in bits in which the value resides.
111 START is the starting bit number in the word, architecture origin.
112 LENGTH is the length of VALUE in bits.
113 TOTAL_LENGTH is the total length of the insn in bits.
115 The result is an error message or NULL if success. */
117 /* ??? This duplicates functionality with bfd's howto table and
118 bfd_install_relocation. */
119 /* ??? This doesn't handle bfd_vma's. Create another function when
123 insert_normal (CGEN_CPU_DESC cd,
126 unsigned int word_offset,
129 unsigned int word_length,
130 unsigned int total_length,
131 CGEN_INSN_BYTES_PTR buffer)
133 static char errbuf[100];
134 /* Written this way to avoid undefined behaviour. */
135 unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
137 /* If LENGTH is zero, this operand doesn't contribute to the value. */
141 if (word_length > 8 * sizeof (CGEN_INSN_INT))
144 /* For architectures with insns smaller than the base-insn-bitsize,
145 word_length may be too big. */
146 if (cd->min_insn_bitsize < cd->base_insn_bitsize)
149 && word_length > total_length)
150 word_length = total_length;
153 /* Ensure VALUE will fit. */
154 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
156 long minval = - (1L << (length - 1));
157 unsigned long maxval = mask;
159 if ((value > 0 && (unsigned long) value > maxval)
162 /* xgettext:c-format */
164 _("operand out of range (%ld not between %ld and %lu)"),
165 value, minval, maxval);
169 else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
171 unsigned long maxval = mask;
172 unsigned long val = (unsigned long) value;
174 /* For hosts with a word size > 32 check to see if value has been sign
175 extended beyond 32 bits. If so then ignore these higher sign bits
176 as the user is attempting to store a 32-bit signed value into an
177 unsigned 32-bit field which is allowed. */
178 if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
183 /* xgettext:c-format */
185 _("operand out of range (0x%lx not between 0 and 0x%lx)"),
192 if (! cgen_signed_overflow_ok_p (cd))
194 long minval = - (1L << (length - 1));
195 long maxval = (1L << (length - 1)) - 1;
197 if (value < minval || value > maxval)
200 /* xgettext:c-format */
201 (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
202 value, minval, maxval);
213 if (CGEN_INSN_LSB0_P)
214 shift = (word_offset + start + 1) - length;
216 shift = total_length - (word_offset + start + length);
217 *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
220 #else /* ! CGEN_INT_INSN_P */
223 unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
225 insert_1 (cd, value, start, length, word_length, bufp);
228 #endif /* ! CGEN_INT_INSN_P */
233 /* Default insn builder (insert handler).
234 The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
235 that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
236 recorded in host byte order, otherwise BUFFER is an array of bytes
237 and the value is recorded in target byte order).
238 The result is an error message or NULL if success. */
241 insert_insn_normal (CGEN_CPU_DESC cd,
242 const CGEN_INSN * insn,
243 CGEN_FIELDS * fields,
244 CGEN_INSN_BYTES_PTR buffer,
247 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
249 const CGEN_SYNTAX_CHAR_TYPE * syn;
251 CGEN_INIT_INSERT (cd);
252 value = CGEN_INSN_BASE_VALUE (insn);
254 /* If we're recording insns as numbers (rather than a string of bytes),
255 target byte order handling is deferred until later. */
259 put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
260 CGEN_FIELDS_BITSIZE (fields), value);
264 cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
265 (unsigned) CGEN_FIELDS_BITSIZE (fields)),
268 #endif /* ! CGEN_INT_INSN_P */
270 /* ??? It would be better to scan the format's fields.
271 Still need to be able to insert a value based on the operand though;
272 e.g. storing a branch displacement that got resolved later.
273 Needs more thought first. */
275 for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
279 if (CGEN_SYNTAX_CHAR_P (* syn))
282 errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
292 /* Cover function to store an insn value into an integral insn. Must go here
293 because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
296 put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
297 CGEN_INSN_BYTES_PTR buf,
302 /* For architectures with insns smaller than the base-insn-bitsize,
303 length may be too big. */
304 if (length > insn_length)
308 int shift = insn_length - length;
309 /* Written this way to avoid undefined behaviour. */
310 CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
312 *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
317 /* Operand extraction. */
319 #if ! CGEN_INT_INSN_P
321 /* Subroutine of extract_normal.
322 Ensure sufficient bytes are cached in EX_INFO.
323 OFFSET is the offset in bytes from the start of the insn of the value.
324 BYTES is the length of the needed value.
325 Returns 1 for success, 0 for failure. */
327 static CGEN_INLINE int
328 fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
329 CGEN_EXTRACT_INFO *ex_info,
334 /* It's doubtful that the middle part has already been fetched so
335 we don't optimize that case. kiss. */
337 disassemble_info *info = (disassemble_info *) ex_info->dis_info;
339 /* First do a quick check. */
340 mask = (1 << bytes) - 1;
341 if (((ex_info->valid >> offset) & mask) == mask)
344 /* Search for the first byte we need to read. */
345 for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
346 if (! (mask & ex_info->valid))
354 status = (*info->read_memory_func)
355 (pc, ex_info->insn_bytes + offset, bytes, info);
359 (*info->memory_error_func) (status, pc, info);
363 ex_info->valid |= ((1 << bytes) - 1) << offset;
369 /* Subroutine of extract_normal. */
371 static CGEN_INLINE long
372 extract_1 (CGEN_CPU_DESC cd,
373 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
378 bfd_vma pc ATTRIBUTE_UNUSED)
383 x = cgen_get_insn_value (cd, bufp, word_length);
385 if (CGEN_INSN_LSB0_P)
386 shift = (start + 1) - length;
388 shift = (word_length - (start + length));
392 #endif /* ! CGEN_INT_INSN_P */
394 /* Default extraction routine.
396 INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
397 or sometimes less for cases like the m32r where the base insn size is 32
398 but some insns are 16 bits.
399 ATTRS is a mask of the boolean attributes. We only need `SIGNED',
400 but for generality we take a bitmask of all of them.
401 WORD_OFFSET is the offset in bits from the start of the insn of the value.
402 WORD_LENGTH is the length of the word in bits in which the value resides.
403 START is the starting bit number in the word, architecture origin.
404 LENGTH is the length of VALUE in bits.
405 TOTAL_LENGTH is the total length of the insn in bits.
407 Returns 1 for success, 0 for failure. */
409 /* ??? The return code isn't properly used. wip. */
411 /* ??? This doesn't handle bfd_vma's. Create another function when
415 extract_normal (CGEN_CPU_DESC cd,
416 #if ! CGEN_INT_INSN_P
417 CGEN_EXTRACT_INFO *ex_info,
419 CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
421 CGEN_INSN_INT insn_value,
423 unsigned int word_offset,
426 unsigned int word_length,
427 unsigned int total_length,
428 #if ! CGEN_INT_INSN_P
431 bfd_vma pc ATTRIBUTE_UNUSED,
437 /* If LENGTH is zero, this operand doesn't contribute to the value
438 so give it a standard value of zero. */
445 if (word_length > 8 * sizeof (CGEN_INSN_INT))
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)
452 if (word_offset + word_length > total_length)
453 word_length = total_length - word_offset;
456 /* Does the value reside in INSN_VALUE, and at the right alignment? */
458 if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
460 if (CGEN_INSN_LSB0_P)
461 value = insn_value >> ((word_offset + start + 1) - length);
463 value = insn_value >> (total_length - ( word_offset + start + length));
466 #if ! CGEN_INT_INSN_P
470 unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
472 if (word_length > 8 * sizeof (CGEN_INSN_INT))
475 if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
478 value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
481 #endif /* ! CGEN_INT_INSN_P */
483 /* Written this way to avoid undefined behaviour. */
484 mask = (((1L << (length - 1)) - 1) << 1) | 1;
488 if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
489 && (value & (1L << (length - 1))))
497 /* Default insn extractor.
499 INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
500 The extracted fields are stored in FIELDS.
501 EX_INFO is used to handle reading variable length insns.
502 Return the length of the insn in bits, or 0 if no match,
503 or -1 if an error occurs fetching data (memory_error_func will have
507 extract_insn_normal (CGEN_CPU_DESC cd,
508 const CGEN_INSN *insn,
509 CGEN_EXTRACT_INFO *ex_info,
510 CGEN_INSN_INT insn_value,
514 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
515 const CGEN_SYNTAX_CHAR_TYPE *syn;
517 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
519 CGEN_INIT_EXTRACT (cd);
521 for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
525 if (CGEN_SYNTAX_CHAR_P (*syn))
528 length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
529 ex_info, insn_value, fields, pc);
534 /* We recognized and successfully extracted this insn. */
535 return CGEN_INSN_BITSIZE (insn);
538 /* Machine generated code added here. */