summaryrefslogtreecommitdiffstats
path: root/contrib/gcc/genopinit.c
blob: a31a444642a69339623509f9ca22184b62e45e25 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
/* Generate code to initialize optabs from machine description.
   Copyright (C) 1993, 94-97, 1998 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.

GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */


#include "hconfig.h"
#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include "system.h"
#include "rtl.h"
#include "obstack.h"

static struct obstack obstack;
struct obstack *rtl_obstack = &obstack;

#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free

char *xmalloc PROTO((unsigned));
static void fatal PVPROTO ((char *, ...)) ATTRIBUTE_PRINTF_1;
void fancy_abort PROTO((void));

/* Many parts of GCC use arrays that are indexed by machine mode and
   contain the insn codes for pattern in the MD file that perform a given
   operation on operands of that mode.

   These patterns are present in the MD file with names that contain
   the mode(s) used and the name of the operation.  This program
   writes a function `init_all_optabs' that initializes the optabs with
   all the insn codes of the relevant patterns present in the MD file.

   This array contains a list of optabs that need to be initialized.  Within
   each string, the name of the pattern to be matched against is delimited
   with %( and %).  In the string, %a and %b are used to match a short mode
   name (the part of the mode name not including `mode' and converted to
   lower-case).  When writing out the initializer, the entire string is
   used.  %A and %B are replaced with the full name of the mode; %a and %b
   are replaced with the short form of the name, as above.

   If %N is present in the pattern, it means the two modes must be consecutive
   widths in the same mode class (e.g, QImode and HImode).  %I means that
   only integer modes should be considered for the next mode, and %F means
   that only float modes should be considered.

   For some optabs, we store the operation by RTL codes.  These are only
   used for comparisons.  In that case, %c and %C are the lower-case and
   upper-case forms of the comparison, respectively.  */

/* The reason we use \% is to avoid sequences of the form %-capletter-%
   which SCCS treats as magic.  This gets warnings which you should ignore.  */

char *optabs[] =
{ "extendtab[(int) %B][(int) %A][0] = CODE_FOR_%(extend%a\%b2%)",
  "extendtab[(int) %B][(int) %A][1] = CODE_FOR_%(zero_extend%a\%b2%)",
  "fixtab[(int) %A][(int) %B][0] = CODE_FOR_%(fix%F\%a%I\%b2%)",
  "fixtab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns%F\%a%b2%)",
  "fixtrunctab[(int) %A][(int) %B][0] = CODE_FOR_%(fix_trunc%F\%a%I\%b2%)",
  "fixtrunctab[(int) %A][(int) %B][1] = CODE_FOR_%(fixuns_trunc%F\%a%I\%b2%)",
  "floattab[(int) %B][(int) %A][0] = CODE_FOR_%(float%I\%a%F\%b2%)",
  "floattab[(int) %B][(int) %A][1] = CODE_FOR_%(floatuns%I\%a%F\%b2%)",
  "add_optab->handlers[(int) %A].insn_code = CODE_FOR_%(add%a3%)",
  "sub_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sub%a3%)",
  "smul_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mul%a3%)",
  "umul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umul%a3_highpart%)",
  "smul_highpart_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smul%a3_highpart%)",
  "smul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(mul%a%b3%)%N",
  "umul_widen_optab->handlers[(int) %B].insn_code = CODE_FOR_%(umul%a%b3%)%N",
  "sdiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%I\%a3%)",
  "udiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udiv%I\%a3%)",
  "sdivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(divmod%a4%)",
  "udivmod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(udivmod%a4%)",
  "smod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mod%a3%)",
  "umod_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umod%a3%)",
  "flodiv_optab->handlers[(int) %A].insn_code = CODE_FOR_%(div%F\%a3%)",
  "ftrunc_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ftrunc%F\%a2%)",
  "and_optab->handlers[(int) %A].insn_code = CODE_FOR_%(and%a3%)",
  "ior_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ior%a3%)",
  "xor_optab->handlers[(int) %A].insn_code = CODE_FOR_%(xor%a3%)",
  "ashl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashl%a3%)",
  "ashr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ashr%a3%)",
  "lshr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(lshr%a3%)",
  "rotl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotl%a3%)",
  "rotr_optab->handlers[(int) %A].insn_code = CODE_FOR_%(rotr%a3%)",
  "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smin%I\%a3%)",
  "smin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(min%F\%a3%)",
  "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(smax%I\%a3%)",
  "smax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(max%F\%a3%)",
  "umin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umin%I\%a3%)",
  "umax_optab->handlers[(int) %A].insn_code = CODE_FOR_%(umax%I\%a3%)",
  "neg_optab->handlers[(int) %A].insn_code = CODE_FOR_%(neg%a2%)",
  "abs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(abs%a2%)",
  "sqrt_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sqrt%a2%)",
  "sin_optab->handlers[(int) %A].insn_code = CODE_FOR_%(sin%a2%)",
  "cos_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cos%a2%)",
  "strlen_optab->handlers[(int) %A].insn_code = CODE_FOR_%(strlen%a%)",
  "one_cmpl_optab->handlers[(int) %A].insn_code = CODE_FOR_%(one_cmpl%a2%)",
  "ffs_optab->handlers[(int) %A].insn_code = CODE_FOR_%(ffs%a2%)",
  "mov_optab->handlers[(int) %A].insn_code = CODE_FOR_%(mov%a%)",
  "movstrict_optab->handlers[(int) %A].insn_code = CODE_FOR_%(movstrict%a%)",
  "cmp_optab->handlers[(int) %A].insn_code = CODE_FOR_%(cmp%a%)",
  "tst_optab->handlers[(int) %A].insn_code = CODE_FOR_%(tst%a%)",
  "bcc_gen_fctn[(int) %C] = gen_%(b%c%)",
  "setcc_gen_code[(int) %C] = CODE_FOR_%(s%c%)",
  "movcc_gen_code[(int) %A] = CODE_FOR_%(mov%acc%)",
  "reload_in_optab[(int) %A] = CODE_FOR_%(reload_in%a%)",
  "reload_out_optab[(int) %A] = CODE_FOR_%(reload_out%a%)",
  "movstr_optab[(int) %A] = CODE_FOR_%(movstr%a%)",
  "clrstr_optab[(int) %A] = CODE_FOR_%(clrstr%a%)" };

/* Allow linking with print-rtl.c.  */
char **insn_name_ptr;

static void gen_insn PROTO((rtx));

static void
gen_insn (insn)
     rtx insn;
{
  char *name = XSTR (insn, 0);
  int m1, m2, op;
  size_t pindex;
  int i;
  char *np, *pp, *p, *q;

  /* Don't mention instructions whose names are the null string.
     They are in the machine description just to be recognized.  */
  if (*name == 0)
    return;

  /* See if NAME matches one of the patterns we have for the optabs we know
     about.  */

  for (pindex = 0; pindex < sizeof optabs / sizeof optabs[0]; pindex++)
    {
      int force_float = 0, force_int = 0;
      int force_consec = 0;
      int matches = 1;

      for (pp = optabs[pindex]; pp[0] != '%' || pp[1] != '('; pp++)
	;

      for (pp += 2, np = name; matches && ! (pp[0] == '%' && pp[1] == ')');
	   pp++)
	{
	  if (*pp != '%')
	    {
	      if (*pp != *np++)
		break;
	    }
	  else
	    switch (*++pp)
	      {
	      case 'N':
		force_consec = 1;
		break;
	      case 'I':
		force_int = 1;
		break;
	      case 'F':
		force_float = 1;
		break;
	      case 'c':
		for (op = 0; op < NUM_RTX_CODE; op++)
		  {
		    for (p = rtx_name[op], q = np; *p; p++, q++)
		      if (*p != *q)
			break;

		    /* We have to be concerned about matching "gt" and
		       missing "gtu", e.g., so verify we have reached the
		       end of thing we are to match.  */
		    if (*p == 0 && *q == 0 && rtx_class[op] == '<')
		      break;
		  }

		if (op == NUM_RTX_CODE)
		  matches = 0;
		else
		  np += strlen (rtx_name[op]);
		break;
	      case 'a':
	      case 'b':
		/* This loop will stop at the first prefix match, so
                   look through the modes in reverse order, in case
                   EXTRA_CC_MODES was used and CC is a prefix of the
                   CC modes (as it should be).  */
		for (i = ((int) MAX_MACHINE_MODE) - 1; i >= 0; i--)
		  {
		    for (p = mode_name[i], q = np; *p; p++, q++)
		      if (tolower (*p) != *q)
			break;

		    if (*p == 0
			&& (! force_int || mode_class[i] == MODE_INT)
			&& (! force_float || mode_class[i] == MODE_FLOAT))
		      break;
		  }

		if (i < 0)
		  matches = 0;
		else if (*pp == 'a')
		  m1 = i, np += strlen (mode_name[i]);
		else
		  m2 = i, np += strlen (mode_name[i]);

		force_int = force_float = 0;
		break;

	      default:
		abort ();
	      }
	}

      if (matches && pp[0] == '%' && pp[1] == ')'
	  && *np == 0
	  && (! force_consec || (int) GET_MODE_WIDER_MODE(m1) == m2))
	break;
    }

  if (pindex == sizeof optabs / sizeof optabs[0])
    return;

  /* We found a match.  If this pattern is only conditionally present,
     write out the "if" and two extra blanks.  */

  if (*XSTR (insn, 2) != 0)
    printf ("  if (HAVE_%s)\n  ", name);

  printf ("  ");

  /* Now write out the initialization, making all required substitutions.  */
  for (pp = optabs[pindex]; *pp; pp++)
    {
      if (*pp != '%')
	printf ("%c", *pp);
      else
	switch (*++pp)
	  {
	  case '(':  case ')':
	  case 'I':  case 'F':  case 'N':
	    break;
	  case 'a':
	    for (np = mode_name[m1]; *np; np++)
	      printf ("%c", tolower (*np));
	    break;
	  case 'b':
	    for (np = mode_name[m2]; *np; np++)
	      printf ("%c", tolower (*np));
	    break;
	  case 'A':
	    printf ("%smode", mode_name[m1]);
	    break;
	  case 'B':
	    printf ("%smode", mode_name[m2]);
	    break;
	  case 'c':
	    printf ("%s", rtx_name[op]);
	    break;
	  case 'C':
	    for (np = rtx_name[op]; *np; np++)
	      printf ("%c", toupper (*np));
	    break;
	  }
    }

  printf (";\n");
}

char *
xmalloc (size)
     unsigned size;
{
  register char *val = (char *) malloc (size);

  if (val == 0)
    fatal ("virtual memory exhausted");

  return val;
}

char *
xrealloc (ptr, size)
     char *ptr;
     unsigned size;
{
  char *result = (char *) realloc (ptr, size);
  if (!result)
    fatal ("virtual memory exhausted");
  return result;
}

static void
fatal VPROTO ((char *format, ...))
{
#ifndef __STDC__
  char *format;
#endif
  va_list ap;

  VA_START (ap, format);

#ifndef __STDC__
  format = va_arg (ap, char *);
#endif

  fprintf (stderr, "genopinit: ");
  vfprintf (stderr, format, ap);
  va_end (ap);
  fprintf (stderr, "\n");
  exit (FATAL_EXIT_CODE);
}

/* More 'friendly' abort that prints the line and file.
   config.h can #define abort fancy_abort if you like that sort of thing.  */

void
fancy_abort ()
{
  fatal ("Internal gcc abort.");
}

int
main (argc, argv)
     int argc;
     char **argv;
{
  rtx desc;
  FILE *infile;
  register int c;

  obstack_init (rtl_obstack);

  if (argc <= 1)
    fatal ("No input file name.");

  infile = fopen (argv[1], "r");
  if (infile == 0)
    {
      perror (argv[1]);
      exit (FATAL_EXIT_CODE);
    }

  init_rtl ();

  printf ("/* Generated automatically by the program `genopinit'\n\
from the machine description file `md'.  */\n\n");

  printf ("#include \"config.h\"\n");
  printf ("#include \"system.h\"\n");
  printf ("#include \"rtl.h\"\n");
  printf ("#include \"flags.h\"\n");
  printf ("#include \"insn-flags.h\"\n");
  printf ("#include \"insn-codes.h\"\n");
  printf ("#include \"insn-config.h\"\n");
  printf ("#include \"recog.h\"\n");
  printf ("#include \"expr.h\"\n");
  printf ("#include \"reload.h\"\n\n");

  printf ("void\ninit_all_optabs ()\n{\n");

  /* Read the machine description.  */

  while (1)
    {
      c = read_skip_spaces (infile);
      if (c == EOF)
	break;
      ungetc (c, infile);

      desc = read_rtx (infile);
      if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
	gen_insn (desc);
    }

  printf ("}\n");

  fflush (stdout);
  exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
  /* NOTREACHED */
  return 0;
}
OpenPOWER on IntegriCloud