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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. | |
6b6ca844 | 5 | Copyright (C) 1987, 1991, 1995 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 | |
a35311b0 RK |
21 | the Free Software Foundation, 59 Temple Place - Suite 330, |
22 | Boston, MA 02111-1307, USA. */ | |
41299f41 TW |
23 | |
24 | ||
25 | #include <stdio.h> | |
20f92396 | 26 | #include "hconfig.h" |
41299f41 TW |
27 | #include "rtl.h" |
28 | #include "obstack.h" | |
29 | ||
ccd043a9 RL |
30 | #ifdef HAVE_STDLIB_H |
31 | #include <stdlib.h> | |
32 | #endif | |
33 | ||
41299f41 TW |
34 | static struct obstack obstack; |
35 | struct obstack *rtl_obstack = &obstack; | |
36 | ||
37 | #define obstack_chunk_alloc xmalloc | |
38 | #define obstack_chunk_free free | |
39 | ||
40 | extern void free (); | |
13884488 | 41 | extern rtx read_rtx (); |
41299f41 TW |
42 | |
43 | char *xmalloc (); | |
44 | static void fatal (); | |
45 | void fancy_abort (); | |
46 | ||
f837a861 MM |
47 | /* Names for patterns. Need to allow linking with print-rtl. */ |
48 | char **insn_name_ptr; | |
49 | ||
50 | /* Obstacks to remember normal, and call insns. */ | |
51 | static struct obstack call_obstack, normal_obstack; | |
52 | ||
53 | /* Max size of names encountered. */ | |
54 | static int max_id_len; | |
55 | ||
56 | /* Count the number of match_operand's found. */ | |
0f41302f | 57 | |
f837a861 MM |
58 | static int |
59 | num_operands (x) | |
60 | rtx x; | |
61 | { | |
62 | int count = 0; | |
63 | int i, j; | |
64 | enum rtx_code code = GET_CODE (x); | |
65 | char *format_ptr = GET_RTX_FORMAT (code); | |
66 | ||
67 | if (code == MATCH_OPERAND) | |
68 | return 1; | |
69 | ||
c7d26bc1 | 70 | if (code == MATCH_OPERATOR || code == MATCH_PARALLEL) |
f837a861 MM |
71 | count++; |
72 | ||
73 | for (i = 0; i < GET_RTX_LENGTH (code); i++) | |
74 | { | |
75 | switch (*format_ptr++) | |
76 | { | |
77 | case 'u': | |
78 | case 'e': | |
79 | count += num_operands (XEXP (x, i)); | |
80 | break; | |
81 | ||
82 | case 'E': | |
83 | if (XVEC (x, i) != NULL) | |
84 | for (j = 0; j < XVECLEN (x, i); j++) | |
85 | count += num_operands (XVECEXP (x, i, j)); | |
86 | ||
87 | break; | |
88 | } | |
89 | } | |
90 | ||
91 | return count; | |
92 | } | |
93 | ||
94 | /* Print out prototype information for a function. */ | |
0f41302f | 95 | |
f837a861 MM |
96 | static void |
97 | gen_proto (insn) | |
98 | rtx insn; | |
99 | { | |
100 | int num = num_operands (insn); | |
101 | printf ("extern rtx gen_%-*s PROTO((", max_id_len, XSTR (insn, 0)); | |
102 | ||
103 | if (num == 0) | |
104 | printf ("void"); | |
105 | else | |
106 | { | |
107 | while (num-- > 1) | |
108 | printf ("rtx, "); | |
109 | ||
110 | printf ("rtx"); | |
111 | } | |
112 | ||
113 | printf ("));\n"); | |
114 | } | |
115 | ||
116 | /* Print out a function declaration without a prototype. */ | |
0f41302f | 117 | |
f837a861 MM |
118 | static void |
119 | gen_nonproto (insn) | |
120 | rtx insn; | |
121 | { | |
122 | printf ("extern rtx gen_%s ();\n", XSTR (insn, 0)); | |
123 | } | |
124 | ||
41299f41 TW |
125 | static void |
126 | gen_insn (insn) | |
127 | rtx insn; | |
128 | { | |
f837a861 | 129 | char *name = XSTR (insn, 0); |
41299f41 | 130 | char *p; |
f837a861 MM |
131 | struct obstack *obstack_ptr; |
132 | int len; | |
41299f41 | 133 | |
6b6ca844 RK |
134 | /* Don't mention instructions whose names are the null string |
135 | or begin with '*'. They are in the machine description just | |
136 | to be recognized. */ | |
137 | if (name[0] == 0 || name[0] == '*') | |
41299f41 TW |
138 | return; |
139 | ||
6b6ca844 RK |
140 | len = strlen (name); |
141 | ||
f837a861 MM |
142 | if (len > max_id_len) |
143 | max_id_len = len; | |
144 | ||
145 | printf ("#define HAVE_%s ", name); | |
41299f41 TW |
146 | if (strlen (XSTR (insn, 2)) == 0) |
147 | printf ("1\n"); | |
148 | else | |
149 | { | |
150 | /* Write the macro definition, putting \'s at the end of each line, | |
151 | if more than one. */ | |
152 | printf ("("); | |
153 | for (p = XSTR (insn, 2); *p; p++) | |
154 | { | |
155 | if (*p == '\n') | |
156 | printf (" \\\n"); | |
157 | else | |
158 | printf ("%c", *p); | |
159 | } | |
160 | printf (")\n"); | |
161 | } | |
6610a1b0 | 162 | |
f837a861 MM |
163 | /* Save the current insn, so that we can later put out appropriate |
164 | prototypes. At present, most md files have the wrong number of | |
6610a1b0 MM |
165 | arguments for the call insns (call, call_value, call_pop, |
166 | call_value_pop) ignoring the extra arguments that are passed for | |
167 | some machines, so by default, turn off the prototype. */ | |
168 | ||
169 | obstack_ptr = (name[0] == 'c' | |
170 | && (!strcmp (name, "call") | |
171 | || !strcmp (name, "call_value") | |
172 | || !strcmp (name, "call_pop") | |
173 | || !strcmp (name, "call_value_pop"))) | |
f837a861 MM |
174 | ? &call_obstack : &normal_obstack; |
175 | ||
176 | obstack_grow (obstack_ptr, &insn, sizeof (rtx)); | |
41299f41 TW |
177 | } |
178 | \f | |
179 | char * | |
180 | xmalloc (size) | |
181 | unsigned size; | |
182 | { | |
183 | register char *val = (char *) malloc (size); | |
184 | ||
185 | if (val == 0) | |
186 | fatal ("virtual memory exhausted"); | |
187 | ||
188 | return val; | |
189 | } | |
190 | ||
191 | char * | |
192 | xrealloc (ptr, size) | |
193 | char *ptr; | |
194 | unsigned size; | |
195 | { | |
196 | char *result = (char *) realloc (ptr, size); | |
197 | if (!result) | |
198 | fatal ("virtual memory exhausted"); | |
199 | return result; | |
200 | } | |
201 | ||
202 | static void | |
203 | fatal (s, a1, a2) | |
204 | char *s; | |
205 | { | |
206 | fprintf (stderr, "genflags: "); | |
207 | fprintf (stderr, s, a1, a2); | |
208 | fprintf (stderr, "\n"); | |
209 | exit (FATAL_EXIT_CODE); | |
210 | } | |
211 | ||
212 | /* More 'friendly' abort that prints the line and file. | |
213 | config.h can #define abort fancy_abort if you like that sort of thing. */ | |
214 | ||
215 | void | |
216 | fancy_abort () | |
217 | { | |
218 | fatal ("Internal gcc abort."); | |
219 | } | |
220 | \f | |
221 | int | |
222 | main (argc, argv) | |
223 | int argc; | |
224 | char **argv; | |
225 | { | |
226 | rtx desc; | |
f837a861 MM |
227 | rtx dummy; |
228 | rtx *call_insns; | |
229 | rtx *normal_insns; | |
230 | rtx *insn_ptr; | |
41299f41 | 231 | FILE *infile; |
41299f41 TW |
232 | register int c; |
233 | ||
234 | obstack_init (rtl_obstack); | |
f837a861 MM |
235 | obstack_init (&call_obstack); |
236 | obstack_init (&normal_obstack); | |
41299f41 TW |
237 | |
238 | if (argc <= 1) | |
239 | fatal ("No input file name."); | |
240 | ||
241 | infile = fopen (argv[1], "r"); | |
242 | if (infile == 0) | |
243 | { | |
244 | perror (argv[1]); | |
245 | exit (FATAL_EXIT_CODE); | |
246 | } | |
247 | ||
248 | init_rtl (); | |
249 | ||
250 | printf ("/* Generated automatically by the program `genflags'\n\ | |
251 | from the machine description file `md'. */\n\n"); | |
252 | ||
253 | /* Read the machine description. */ | |
254 | ||
255 | while (1) | |
256 | { | |
257 | c = read_skip_spaces (infile); | |
258 | if (c == EOF) | |
259 | break; | |
260 | ungetc (c, infile); | |
261 | ||
262 | desc = read_rtx (infile); | |
263 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) | |
264 | gen_insn (desc); | |
265 | } | |
266 | ||
f837a861 | 267 | /* Print out the prototypes now. */ |
0f41302f | 268 | dummy = (rtx) 0; |
f837a861 MM |
269 | obstack_grow (&call_obstack, &dummy, sizeof (rtx)); |
270 | call_insns = (rtx *) obstack_finish (&call_obstack); | |
271 | ||
272 | obstack_grow (&normal_obstack, &dummy, sizeof (rtx)); | |
273 | normal_insns = (rtx *) obstack_finish (&normal_obstack); | |
274 | ||
275 | printf ("\n#ifndef NO_MD_PROTOTYPES\n"); | |
276 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) | |
277 | gen_proto (*insn_ptr); | |
278 | ||
279 | printf ("\n#ifdef MD_CALL_PROTOTYPES\n"); | |
280 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
281 | gen_proto (*insn_ptr); | |
282 | ||
283 | printf ("\n#else /* !MD_CALL_PROTOTYPES */\n"); | |
284 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
285 | gen_nonproto (*insn_ptr); | |
286 | ||
287 | printf ("#endif /* !MD_CALL_PROTOTYPES */\n"); | |
288 | printf ("\n#else /* NO_MD_PROTOTYPES */\n"); | |
289 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) | |
290 | gen_nonproto (*insn_ptr); | |
291 | ||
292 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
293 | gen_nonproto (*insn_ptr); | |
294 | ||
295 | printf ("#endif /* NO_MD_PROTOTYPES */\n"); | |
296 | ||
41299f41 TW |
297 | fflush (stdout); |
298 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
299 | /* NOTREACHED */ | |
300 | return 0; | |
301 | } |