| 1 | /* Generate from machine description: |
| 2 | |
| 3 | - some flags HAVE_... saying which simple standard instructions are |
| 4 | available for this machine. |
| 5 | Copyright (C) 1987 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 1, 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 "config.h" |
| 26 | #include "rtl.h" |
| 27 | #include "obstack.h" |
| 28 | |
| 29 | struct obstack obstack; |
| 30 | struct obstack *rtl_obstack = &obstack; |
| 31 | |
| 32 | #define obstack_chunk_alloc xmalloc |
| 33 | #define obstack_chunk_free free |
| 34 | extern int xmalloc (); |
| 35 | extern void free (); |
| 36 | |
| 37 | void fatal (); |
| 38 | void fancy_abort (); |
| 39 | |
| 40 | void |
| 41 | gen_insn (insn) |
| 42 | rtx insn; |
| 43 | { |
| 44 | /* Don't mention instructions whose names are the null string. |
| 45 | They are in the machine description just to be recognized. */ |
| 46 | if (strlen (XSTR (insn, 0)) == 0) |
| 47 | return; |
| 48 | |
| 49 | printf ("#define HAVE_%s (%s)\n", XSTR (insn, 0), |
| 50 | strlen (XSTR (insn, 2)) ? XSTR (insn, 2) : "1"); |
| 51 | printf ("extern rtx gen_%s ();\n", XSTR (insn, 0)); |
| 52 | } |
| 53 | \f |
| 54 | int |
| 55 | xmalloc (size) |
| 56 | { |
| 57 | register int val = malloc (size); |
| 58 | |
| 59 | if (val == 0) |
| 60 | fatal ("virtual memory exhausted"); |
| 61 | |
| 62 | return val; |
| 63 | } |
| 64 | |
| 65 | int |
| 66 | xrealloc (ptr, size) |
| 67 | char *ptr; |
| 68 | int size; |
| 69 | { |
| 70 | int result = realloc (ptr, size); |
| 71 | if (!result) |
| 72 | fatal ("virtual memory exhausted"); |
| 73 | return result; |
| 74 | } |
| 75 | |
| 76 | void |
| 77 | fatal (s, a1, a2) |
| 78 | char *s; |
| 79 | { |
| 80 | fprintf (stderr, "genflags: "); |
| 81 | fprintf (stderr, s, a1, a2); |
| 82 | fprintf (stderr, "\n"); |
| 83 | exit (FATAL_EXIT_CODE); |
| 84 | } |
| 85 | |
| 86 | /* More 'friendly' abort that prints the line and file. |
| 87 | config.h can #define abort fancy_abort if you like that sort of thing. */ |
| 88 | |
| 89 | void |
| 90 | fancy_abort () |
| 91 | { |
| 92 | fatal ("Internal gcc abort."); |
| 93 | } |
| 94 | \f |
| 95 | int |
| 96 | main (argc, argv) |
| 97 | int argc; |
| 98 | char **argv; |
| 99 | { |
| 100 | rtx desc; |
| 101 | FILE *infile; |
| 102 | extern rtx read_rtx (); |
| 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 `genflags'\n\ |
| 120 | from the machine description file `md'. */\n\n"); |
| 121 | |
| 122 | /* Read the machine description. */ |
| 123 | |
| 124 | while (1) |
| 125 | { |
| 126 | c = read_skip_spaces (infile); |
| 127 | if (c == EOF) |
| 128 | break; |
| 129 | ungetc (c, infile); |
| 130 | |
| 131 | desc = read_rtx (infile); |
| 132 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) |
| 133 | gen_insn (desc); |
| 134 | } |
| 135 | |
| 136 | fflush (stdout); |
| 137 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
| 138 | } |