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41299f41 TW |
1 | /* Generate from machine description: |
2 | ||
3 | - some flags HAVE_... saying which simple standard instructions are | |
4 | available for this machine. | |
ae90e6a3 | 5 | Copyright (C) 1987, 1991 Free Software Foundation, Inc. |
41299f41 TW |
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 2, 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 | static struct obstack obstack; | |
30 | struct obstack *rtl_obstack = &obstack; | |
31 | ||
32 | #define obstack_chunk_alloc xmalloc | |
33 | #define obstack_chunk_free free | |
34 | ||
35 | extern void free (); | |
13884488 | 36 | extern rtx read_rtx (); |
41299f41 TW |
37 | |
38 | char *xmalloc (); | |
39 | static void fatal (); | |
40 | void fancy_abort (); | |
41 | ||
42 | static void | |
43 | gen_insn (insn) | |
44 | rtx insn; | |
45 | { | |
46 | char *p; | |
47 | ||
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) | |
51 | return; | |
52 | ||
53 | printf ("#define HAVE_%s ", XSTR (insn, 0)); | |
54 | if (strlen (XSTR (insn, 2)) == 0) | |
55 | printf ("1\n"); | |
56 | else | |
57 | { | |
58 | /* Write the macro definition, putting \'s at the end of each line, | |
59 | if more than one. */ | |
60 | printf ("("); | |
61 | for (p = XSTR (insn, 2); *p; p++) | |
62 | { | |
63 | if (*p == '\n') | |
64 | printf (" \\\n"); | |
65 | else | |
66 | printf ("%c", *p); | |
67 | } | |
68 | printf (")\n"); | |
69 | } | |
70 | ||
71 | printf ("extern rtx gen_%s ();\n", XSTR (insn, 0)); | |
72 | } | |
73 | \f | |
74 | char * | |
75 | xmalloc (size) | |
76 | unsigned size; | |
77 | { | |
78 | register char *val = (char *) malloc (size); | |
79 | ||
80 | if (val == 0) | |
81 | fatal ("virtual memory exhausted"); | |
82 | ||
83 | return val; | |
84 | } | |
85 | ||
86 | char * | |
87 | xrealloc (ptr, size) | |
88 | char *ptr; | |
89 | unsigned size; | |
90 | { | |
91 | char *result = (char *) realloc (ptr, size); | |
92 | if (!result) | |
93 | fatal ("virtual memory exhausted"); | |
94 | return result; | |
95 | } | |
96 | ||
97 | static void | |
98 | fatal (s, a1, a2) | |
99 | char *s; | |
100 | { | |
101 | fprintf (stderr, "genflags: "); | |
102 | fprintf (stderr, s, a1, a2); | |
103 | fprintf (stderr, "\n"); | |
104 | exit (FATAL_EXIT_CODE); | |
105 | } | |
106 | ||
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. */ | |
109 | ||
110 | void | |
111 | fancy_abort () | |
112 | { | |
113 | fatal ("Internal gcc abort."); | |
114 | } | |
115 | \f | |
116 | int | |
117 | main (argc, argv) | |
118 | int argc; | |
119 | char **argv; | |
120 | { | |
121 | rtx desc; | |
122 | FILE *infile; | |
41299f41 TW |
123 | register int c; |
124 | ||
125 | obstack_init (rtl_obstack); | |
126 | ||
127 | if (argc <= 1) | |
128 | fatal ("No input file name."); | |
129 | ||
130 | infile = fopen (argv[1], "r"); | |
131 | if (infile == 0) | |
132 | { | |
133 | perror (argv[1]); | |
134 | exit (FATAL_EXIT_CODE); | |
135 | } | |
136 | ||
137 | init_rtl (); | |
138 | ||
139 | printf ("/* Generated automatically by the program `genflags'\n\ | |
140 | from the machine description file `md'. */\n\n"); | |
141 | ||
142 | /* Read the machine description. */ | |
143 | ||
144 | while (1) | |
145 | { | |
146 | c = read_skip_spaces (infile); | |
147 | if (c == EOF) | |
148 | break; | |
149 | ungetc (c, infile); | |
150 | ||
151 | desc = read_rtx (infile); | |
152 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) | |
153 | gen_insn (desc); | |
154 | } | |
155 | ||
156 | fflush (stdout); | |
157 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
158 | /* NOTREACHED */ | |
159 | return 0; | |
160 | } |