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1/* Generate code from machine description to extract operands from insn as rtl.
2 Copyright (C) 1987, 1991, 1992, 1993 Free Software Foundation, Inc.
2 Copyright (C) 1987, 91, 92, 93, 97, 1998 Free Software Foundation, Inc.
3
4This file is part of GNU CC.
5
6GNU CC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2, or (at your option)
9any later version.
10
11GNU CC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GNU CC; see the file COPYING. If not, write to
18the Free Software Foundation, 59 Temple Place - Suite 330,
19Boston, MA 02111-1307, USA. */
20
21
22#include <stdio.h>
22#include "hconfig.h"
23#ifdef __STDC__
24#include <stdarg.h>
25#else
26#include <varargs.h>
27#endif
28#include "system.h"
29#include "rtl.h"
30#include "obstack.h"
31#include "insn-config.h"
32
33static struct obstack obstack;
34struct obstack *rtl_obstack = &obstack;
35
36#define obstack_chunk_alloc xmalloc
37#define obstack_chunk_free free
38
34extern void free ();
35extern rtx read_rtx ();
36
39/* Names for patterns. Need to allow linking with print-rtl. */
40char **insn_name_ptr;
41
42/* This structure contains all the information needed to describe one
43 set of extractions methods. Each method may be used by more than
44 one pattern if the operands are in the same place.
45
46 The string for each operand describes that path to the operand and

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95/* Record the operand number of any MATCH_DUPs. */
96
97static int dupnums[MAX_DUP_OPERANDS];
98
99/* Record the list of insn_codes for peepholes. */
100
101static struct code_ptr *peepholes;
102
101static void walk_rtx ();
102static void print_path ();
103char *xmalloc ();
104char *xrealloc ();
105static void fatal ();
106static char *copystr ();
103static void gen_insn PROTO ((rtx));
104static void walk_rtx PROTO ((rtx, char *));
105static void print_path PROTO ((char *));
106char *xmalloc PROTO ((unsigned));
107char *xrealloc PROTO ((char *, unsigned));
108static void fatal PVPROTO ((char *, ...)) ATTRIBUTE_PRINTF_1;
109static char *copystr PROTO ((char *));
110static void mybzero ();
108void fancy_abort ();
111void fancy_abort PROTO ((void));
112
113static void
114gen_insn (insn)
115 rtx insn;
116{
117 register int i;
118 register struct extraction *p;
119 register struct code_ptr *link;

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138 path[1] = 0;
139
140 walk_rtx (XVECEXP (insn, 1, i), path);
141 }
142
143 link = (struct code_ptr *) xmalloc (sizeof (struct code_ptr));
144 link->insn_code = insn_code_number;
145
143 /* See if we find something that already had this extraction method. */
146 /* See if we find something that already had this extraction method. */
147
148 for (p = extractions; p; p = p->next)
149 {
150 if (p->op_count != op_count || p->dup_count != dup_count)
151 continue;
152
153 for (i = 0; i < op_count; i++)
154 if (p->oplocs[i] != oplocs[i]

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194walk_rtx (x, path)
195 rtx x;
196 char *path;
197{
198 register RTX_CODE code;
199 register int i;
200 register int len;
201 register char *fmt;
199 register struct code_ptr *link;
202 int depth = strlen (path);
203 char *newpath;
204
205 if (x == 0)
206 return;
207
208 code = GET_CODE (x);
209

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272 newpath[depth] = 'a' + i;
273 walk_rtx (XVECEXP (x, 2, i), newpath);
274 }
275 return;
276
277 case ADDRESS:
278 walk_rtx (XEXP (x, 0), path);
279 return;
280
281 default:
282 break;
283 }
284
285 newpath = (char *) alloca (depth + 2);
286 strcpy (newpath, path);
287 newpath[depth + 1] = 0;
288
289 fmt = GET_RTX_FORMAT (code);
290 len = GET_RTX_LENGTH (code);

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313
314static void
315print_path (path)
316 char *path;
317{
318 register int len = strlen (path);
319 register int i;
320
321 if (len == 0)
322 {
323 /* Don't emit "pat", since we may try to take the address of it,
324 which isn't what is intended. */
325 printf("PATTERN (insn)");
326 return;
327 }
328
329 /* We first write out the operations (XEXP or XVECEXP) in reverse
330 order, then write "insn", then the indices in forward order. */
331
332 for (i = len - 1; i >=0 ; i--)
333 {
334 if (path[i] >= 'a' && path[i] <= 'z')
335 printf ("XVECEXP (");
336 else if (path[i] >= '0' && path[i] <= '9')

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370{
371 char *result = (char *) realloc (ptr, size);
372 if (!result)
373 fatal ("virtual memory exhausted");
374 return result;
375}
376
377static void
365fatal (s, a1, a2)
366 char *s;
378fatal VPROTO ((char *format, ...))
379{
380#ifndef __STDC__
381 char *format;
382#endif
383 va_list ap;
384
385 VA_START (ap, format);
386
387#ifndef __STDC__
388 format = va_arg (ap, char *);
389#endif
390
391 fprintf (stderr, "genextract: ");
369 fprintf (stderr, s, a1, a2);
392 vfprintf (stderr, format, ap);
393 va_end (ap);
394 fprintf (stderr, "\n");
395 exit (FATAL_EXIT_CODE);
396}
397
398/* More 'friendly' abort that prints the line and file.
399 config.h can #define abort fancy_abort if you like that sort of thing. */
400
401void

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457 in parallel with the tables in insn-output.c. */
458
459 insn_code_number = 0;
460
461 printf ("/* Generated automatically by the program `genextract'\n\
462from the machine description file `md'. */\n\n");
463
464 printf ("#include \"config.h\"\n");
465 printf ("#include \"system.h\"\n");
466 printf ("#include \"rtl.h\"\n\n");
467
468 /* This variable exists only so it can be the "location"
469 of any missing operand whose numbers are skipped by a given pattern. */
445 printf ("static rtx junk;\n");
470 printf ("static rtx junk ATTRIBUTE_UNUSED;\n");
471
472 printf ("extern rtx recog_operand[];\n");
473 printf ("extern rtx *recog_operand_loc[];\n");
474 printf ("extern rtx *recog_dup_loc[];\n");
475 printf ("extern char recog_dup_num[];\n");
476
477 printf ("void\ninsn_extract (insn)\n");
478 printf (" rtx insn;\n");
479 printf ("{\n");
480 printf (" register rtx *ro = recog_operand;\n");
481 printf (" register rtx **ro_loc = recog_operand_loc;\n");
482 printf (" rtx pat = PATTERN (insn);\n");
483 printf (" int i ATTRIBUTE_UNUSED;\n\n");
484 printf (" switch (INSN_CODE (insn))\n");
485 printf (" {\n");
486 printf (" case -1:\n");
487 printf (" fatal_insn_not_found (insn);\n\n");
488
489 /* Read the machine description. */
490
491 while (1)

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523 if (peepholes)
524 {
525 for (link = peepholes; link; link = link->next)
526 printf (" case %d:\n", link->insn_code);
527
528 /* The vector in the insn says how many operands it has.
529 And all it contains are operands. In fact, the vector was
530 created just for the sake of this function. */
505 printf ("#if __GNUC__ > 1 && !defined (bcopy)\n");
506 printf ("#define bcopy(FROM,TO,COUNT) __builtin_memcpy(TO,FROM,COUNT)\n");
507 printf ("#endif\n");
508 printf (" bcopy (&XVECEXP (pat, 0, 0), ro,\n");
509 printf (" sizeof (rtx) * XVECLEN (pat, 0));\n");
531 printf (" for (i = XVECLEN (pat, 0) - 1; i >= 0; i--)\n");
532 printf (" ro[i] = XVECEXP (pat, 0, i);\n");
533 printf (" break;\n\n");
534 }
535
536 /* Write out all the ways to extract insn operands. */
537 for (p = extractions; p; p = p->next)
538 {
539 for (link = p->insns; link; link = link->next)
540 printf (" case %d:\n", link->insn_code);

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