160 lines
3.4 KiB
C
160 lines
3.4 KiB
C
/* Generate from machine description:
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- some macros CODE_FOR_... giving the insn_code_number value
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for each of the defined standard insn names.
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Copyright (C) 1987, 1991 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include "hconfig.h"
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#include "rtl.h"
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#include "obstack.h"
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static struct obstack obstack;
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struct obstack *rtl_obstack = &obstack;
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#define obstack_chunk_alloc xmalloc
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#define obstack_chunk_free free
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extern void free ();
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extern rtx read_rtx ();
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char *xmalloc ();
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static void fatal ();
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void fancy_abort ();
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static int insn_code_number;
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static void
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gen_insn (insn)
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rtx insn;
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{
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/* Don't mention instructions whose names are the null string.
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They are in the machine description just to be recognized. */
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if (strlen (XSTR (insn, 0)) != 0)
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printf (" CODE_FOR_%s = %d,\n", XSTR (insn, 0),
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insn_code_number);
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}
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char *
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xmalloc (size)
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unsigned size;
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{
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register char *val = (char *) malloc (size);
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if (val == 0)
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fatal ("virtual memory exhausted");
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return val;
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}
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char *
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xrealloc (ptr, size)
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char *ptr;
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unsigned size;
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{
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char *result = (char *) realloc (ptr, size);
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if (!result)
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fatal ("virtual memory exhausted");
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return result;
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}
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static void
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fatal (s, a1, a2)
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char *s;
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{
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fprintf (stderr, "gencodes: ");
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fprintf (stderr, s, a1, a2);
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fprintf (stderr, "\n");
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exit (FATAL_EXIT_CODE);
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}
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/* More 'friendly' abort that prints the line and file.
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config.h can #define abort fancy_abort if you like that sort of thing. */
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void
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fancy_abort ()
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{
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fatal ("Internal gcc abort.");
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}
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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rtx desc;
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FILE *infile;
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register int c;
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obstack_init (rtl_obstack);
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if (argc <= 1)
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fatal ("No input file name.");
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infile = fopen (argv[1], "r");
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if (infile == 0)
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{
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perror (argv[1]);
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exit (FATAL_EXIT_CODE);
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}
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init_rtl ();
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printf ("/* Generated automatically by the program `gencodes'\n\
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from the machine description file `md'. */\n\n");
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printf ("#ifndef MAX_INSN_CODE\n\n");
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/* Read the machine description. */
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insn_code_number = 0;
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printf ("enum insn_code {\n");
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while (1)
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{
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c = read_skip_spaces (infile);
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if (c == EOF)
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break;
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ungetc (c, infile);
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desc = read_rtx (infile);
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if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
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{
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gen_insn (desc);
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insn_code_number++;
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}
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if (GET_CODE (desc) == DEFINE_PEEPHOLE
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|| GET_CODE (desc) == DEFINE_SPLIT)
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{
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insn_code_number++;
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}
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}
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printf (" CODE_FOR_nothing };\n");
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printf ("\n#define MAX_INSN_CODE ((int) CODE_FOR_nothing)\n");
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printf ("#endif /* MAX_INSN_CODE */\n");
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fflush (stdout);
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exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
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/* NOTREACHED */
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return 0;
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}
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