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dfaf2a94 WJ |
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 | } |