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Annotation of GNUtools/cc/gencodes.c, revision 1.1.1.1

1.1       root        1: /* Generate from machine description:
                      2: 
                      3:    - some macros CODE_FOR_... giving the insn_code_number value
                      4:    for each of the defined standard insn names.
                      5:    Copyright (C) 1987, 1991 Free Software Foundation, Inc.
                      6: 
                      7: This file is part of GNU CC.
                      8: 
                      9: GNU CC is free software; you can redistribute it and/or modify
                     10: it under the terms of the GNU General Public License as published by
                     11: the Free Software Foundation; either version 2, or (at your option)
                     12: any later version.
                     13: 
                     14: GNU CC is distributed in the hope that it will be useful,
                     15: but WITHOUT ANY WARRANTY; without even the implied warranty of
                     16: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     17: GNU General Public License for more details.
                     18: 
                     19: You should have received a copy of the GNU General Public License
                     20: along with GNU CC; see the file COPYING.  If not, write to
                     21: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
                     22: 
                     23: 
                     24: #include <stdio.h>
                     25: #include "hconfig.h"
                     26: #include "rtl.h"
                     27: #include "obstack.h"
                     28: 
                     29: static struct obstack obstack;
                     30: struct obstack *rtl_obstack = &obstack;
                     31: 
                     32: #define obstack_chunk_alloc xmalloc
                     33: #define obstack_chunk_free free
                     34: 
                     35: extern void free ();
                     36: extern rtx read_rtx ();
                     37: 
                     38: char *xmalloc ();
                     39: static void fatal ();
                     40: void fancy_abort ();
                     41: 
                     42: static int insn_code_number;
                     43: 
                     44: static void
                     45: gen_insn (insn)
                     46:      rtx insn;
                     47: {
                     48:   /* Don't mention instructions whose names are the null string.
                     49:      They are in the machine description just to be recognized.  */
                     50:   if (strlen (XSTR (insn, 0)) != 0)
                     51:     printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
                     52:            insn_code_number);
                     53: }
                     54: 
                     55: char *
                     56: xmalloc (size)
                     57:      unsigned size;
                     58: {
                     59:   register char *val = (char *) malloc (size);
                     60: 
                     61:   if (val == 0)
                     62:     fatal ("virtual memory exhausted");
                     63:   return val;
                     64: }
                     65: 
                     66: char *
                     67: xrealloc (ptr, size)
                     68:      char *ptr;
                     69:      unsigned size;
                     70: {
                     71:   char *result = (char *) realloc (ptr, size);
                     72:   if (!result)
                     73:     fatal ("virtual memory exhausted");
                     74:   return result;
                     75: }
                     76: 
                     77: static void
                     78: fatal (s, a1, a2)
                     79:      char *s;
                     80: {
                     81:   fprintf (stderr, "gencodes: ");
                     82:   fprintf (stderr, s, a1, a2);
                     83:   fprintf (stderr, "\n");
                     84:   exit (FATAL_EXIT_CODE);
                     85: }
                     86: 
                     87: /* More 'friendly' abort that prints the line and file.
                     88:    config.h can #define abort fancy_abort if you like that sort of thing.  */
                     89: 
                     90: void
                     91: fancy_abort ()
                     92: {
                     93:   fatal ("Internal gcc abort.");
                     94: }
                     95: 
                     96: int
                     97: main (argc, argv)
                     98:      int argc;
                     99:      char **argv;
                    100: {
                    101:   rtx desc;
                    102:   FILE *infile;
                    103:   register int c;
                    104: 
                    105:   obstack_init (rtl_obstack);
                    106: 
                    107:   if (argc <= 1)
                    108:     fatal ("No input file name.");
                    109: 
                    110:   infile = fopen (argv[1], "r");
                    111:   if (infile == 0)
                    112:     {
                    113:       perror (argv[1]);
                    114:       exit (FATAL_EXIT_CODE);
                    115:     }
                    116: 
                    117:   init_rtl ();
                    118: 
                    119:   printf ("/* Generated automatically by the program `gencodes'\n\
                    120: from the machine description file `md'.  */\n\n");
                    121: 
                    122:   printf ("#ifndef MAX_INSN_CODE\n\n");
                    123: 
                    124:   /* Read the machine description.  */
                    125: 
                    126:   insn_code_number = 0;
                    127:   printf ("enum insn_code {\n");
                    128: 
                    129:   while (1)
                    130:     {
                    131:       c = read_skip_spaces (infile);
                    132:       if (c == EOF)
                    133:        break;
                    134:       ungetc (c, infile);
                    135: 
                    136:       desc = read_rtx (infile);
                    137:       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
                    138:        {
                    139:          gen_insn (desc);
                    140:          insn_code_number++;
                    141:        }
                    142:       if (GET_CODE (desc) == DEFINE_PEEPHOLE
                    143:          || GET_CODE (desc) == DEFINE_SPLIT)
                    144:        {
                    145:          insn_code_number++;
                    146:        }
                    147:     }
                    148: 
                    149:   printf ("  CODE_FOR_nothing };\n");
                    150: 
                    151:   printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
                    152: 
                    153:   printf ("#endif /* MAX_INSN_CODE */\n");
                    154: 
                    155:   fflush (stdout);
                    156:   exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
                    157:   /* NOTREACHED */
                    158:   return 0;
                    159: }

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