Initial import, 0.1 + pk 0.2.4-B1

[unix-history] / gnu / usr.bin / gcc1 / cc1 / gencodes.c

/* Generate from machine description:

  - some macros CODE_FOR_... giving the insn_code_number value
  for each of the defined standard insn names.
  Copyright (C) 1987 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#include <stdio.h>
#include "config.h"
#include "rtl.h"
#include "obstack.h"

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

#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free free
extern int xmalloc ();
extern void free ();

void fatal ();
void fancy_abort ();

int insn_code_number;

void
gen_insn (insn)
    rtx insn;
{
 /* Don't mention instructions whose names are the null string.
    They are in the machine description just to be recognized.  */
 if (strlen (XSTR (insn, 0)) != 0)
   printf ("  CODE_FOR_%s = %d,\n", XSTR (insn, 0),
           insn_code_number);
}

int
xmalloc (size)
{
 register int val = malloc (size);

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

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

void
fatal (s, a1, a2)
    char *s;
{
 fprintf (stderr, "gencodes: ");
 fprintf (stderr, s, a1, a2);
 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.");
}
\f
int
main (argc, argv)
    int argc;
    char **argv;
{
 rtx desc;
 FILE *infile;
 extern rtx read_rtx ();
 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 `gencodes'\n\
from the machine description file `md'.  */\n\n");

 printf ("#ifndef MAX_INSN_CODE\n\n");

 /* Read the machine description.  */

 insn_code_number = 0;
 printf ("enum insn_code {\n");

 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);
         insn_code_number++;
       }
     if (GET_CODE (desc) == DEFINE_PEEPHOLE)
       {
         insn_code_number++;
       }
   }

 printf ("  CODE_FOR_nothing };\n");

 printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");

 printf ("#endif /* MAX_INSN_CODE */\n");

 fflush (stdout);
 exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
}