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- /* Generate from machine description:
-
- - some flags HAVE_... saying which simple standard instructions are
- available for this machine.
- 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 ();
-
- 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)
- return;
-
- printf ("#define HAVE_%s (%s)\n", XSTR (insn, 0),
- strlen (XSTR (insn, 2)) ? XSTR (insn, 2) : "1");
- printf ("extern rtx gen_%s ();\n", XSTR (insn, 0));
- }
-
- int
- xmalloc (size)
- {
- register int val = (int)malloc (size);
-
- if (val == 0)
- fatal ("virtual memory exhausted");
-
- return val;
- }
-
- int
- xrealloc (ptr, size)
- char *ptr;
- int size;
- {
- int result = (int)realloc (ptr, size);
- if (!result)
- fatal ("virtual memory exhausted");
- return result;
- }
-
- void
- fatal (s, a1, a2)
- char *s;
- {
- fprintf (stderr, "genflags: ");
- 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.");
- }
-
- 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 `genflags'\n\
- from the machine description file `md'. */\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);
- }
-
- fflush (stdout);
- exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
- }
-