1 /* Generate from machine description:
3 - some flags HAVE_... saying which simple standard instructions are
4 available for this machine.
5 Copyright (C) 1987, 1991 Free Software Foundation, Inc.
7 This file is part of GNU CC.
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)
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.
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. */
29 static struct obstack obstack;
30 struct obstack *rtl_obstack = &obstack;
32 #define obstack_chunk_alloc xmalloc
33 #define obstack_chunk_free free
36 extern rtx read_rtx ();
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)
53 printf ("#define HAVE_%s ", XSTR (insn, 0));
54 if (strlen (XSTR (insn, 2)) == 0)
58 /* Write the macro definition, putting \'s at the end of each line,
61 for (p = XSTR (insn, 2); *p; p++)
71 printf ("extern rtx gen_%s ();\n", XSTR (insn, 0));
78 register char *val = (char *) malloc (size);
81 fatal ("virtual memory exhausted");
91 char *result = (char *) realloc (ptr, size);
93 fatal ("virtual memory exhausted");
101 fprintf (stderr, "genflags: ");
102 fprintf (stderr, s, a1, a2);
103 fprintf (stderr, "\n");
104 exit (FATAL_EXIT_CODE);
107 /* More 'friendly' abort that prints the line and file.
108 config.h can #define abort fancy_abort if you like that sort of thing. */
113 fatal ("Internal gcc abort.");
125 obstack_init (rtl_obstack);
128 fatal ("No input file name.");
130 infile = fopen (argv[1], "r");
134 exit (FATAL_EXIT_CODE);
139 printf ("/* Generated automatically by the program `genflags'\n\
140 from the machine description file `md'. */\n\n");
142 /* Read the machine description. */
146 c = read_skip_spaces (infile);
151 desc = read_rtx (infile);
152 if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
157 exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);