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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. | |
34627ce6 | 5 | Copyright (C) 1987, 1991, 1995, 1998, 1999 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 | ||
20f92396 | 25 | #include "hconfig.h" |
0b93b64e | 26 | #include "system.h" |
41299f41 TW |
27 | #include "rtl.h" |
28 | #include "obstack.h" | |
f8b6598e | 29 | #include "errors.h" |
41299f41 TW |
30 | |
31 | static struct obstack obstack; | |
32 | struct obstack *rtl_obstack = &obstack; | |
33 | ||
34 | #define obstack_chunk_alloc xmalloc | |
35 | #define obstack_chunk_free free | |
36 | ||
f837a861 MM |
37 | /* Names for patterns. Need to allow linking with print-rtl. */ |
38 | char **insn_name_ptr; | |
39 | ||
40 | /* Obstacks to remember normal, and call insns. */ | |
41 | static struct obstack call_obstack, normal_obstack; | |
42 | ||
43 | /* Max size of names encountered. */ | |
44 | static int max_id_len; | |
45 | ||
56c0e996 BS |
46 | static int num_operands PROTO((rtx)); |
47 | static void gen_proto PROTO((rtx)); | |
48 | static void gen_nonproto PROTO((rtx)); | |
49 | static void gen_insn PROTO((rtx)); | |
50 | ||
51 | ||
f837a861 | 52 | /* Count the number of match_operand's found. */ |
0f41302f | 53 | |
f837a861 MM |
54 | static int |
55 | num_operands (x) | |
56 | rtx x; | |
57 | { | |
58 | int count = 0; | |
59 | int i, j; | |
60 | enum rtx_code code = GET_CODE (x); | |
6f7d635c | 61 | const char *format_ptr = GET_RTX_FORMAT (code); |
f837a861 MM |
62 | |
63 | if (code == MATCH_OPERAND) | |
64 | return 1; | |
65 | ||
c7d26bc1 | 66 | if (code == MATCH_OPERATOR || code == MATCH_PARALLEL) |
f837a861 MM |
67 | count++; |
68 | ||
69 | for (i = 0; i < GET_RTX_LENGTH (code); i++) | |
70 | { | |
71 | switch (*format_ptr++) | |
72 | { | |
73 | case 'u': | |
74 | case 'e': | |
75 | count += num_operands (XEXP (x, i)); | |
76 | break; | |
77 | ||
78 | case 'E': | |
79 | if (XVEC (x, i) != NULL) | |
80 | for (j = 0; j < XVECLEN (x, i); j++) | |
81 | count += num_operands (XVECEXP (x, i, j)); | |
82 | ||
83 | break; | |
84 | } | |
85 | } | |
86 | ||
87 | return count; | |
88 | } | |
89 | ||
90 | /* Print out prototype information for a function. */ | |
0f41302f | 91 | |
f837a861 MM |
92 | static void |
93 | gen_proto (insn) | |
94 | rtx insn; | |
95 | { | |
96 | int num = num_operands (insn); | |
97 | printf ("extern rtx gen_%-*s PROTO((", max_id_len, XSTR (insn, 0)); | |
98 | ||
99 | if (num == 0) | |
100 | printf ("void"); | |
101 | else | |
102 | { | |
103 | while (num-- > 1) | |
104 | printf ("rtx, "); | |
105 | ||
106 | printf ("rtx"); | |
107 | } | |
108 | ||
109 | printf ("));\n"); | |
110 | } | |
111 | ||
112 | /* Print out a function declaration without a prototype. */ | |
0f41302f | 113 | |
f837a861 MM |
114 | static void |
115 | gen_nonproto (insn) | |
116 | rtx insn; | |
117 | { | |
118 | printf ("extern rtx gen_%s ();\n", XSTR (insn, 0)); | |
119 | } | |
120 | ||
41299f41 TW |
121 | static void |
122 | gen_insn (insn) | |
123 | rtx insn; | |
124 | { | |
f837a861 | 125 | char *name = XSTR (insn, 0); |
41299f41 | 126 | char *p; |
f837a861 MM |
127 | struct obstack *obstack_ptr; |
128 | int len; | |
41299f41 | 129 | |
6b6ca844 RK |
130 | /* Don't mention instructions whose names are the null string |
131 | or begin with '*'. They are in the machine description just | |
132 | to be recognized. */ | |
133 | if (name[0] == 0 || name[0] == '*') | |
41299f41 TW |
134 | return; |
135 | ||
6b6ca844 RK |
136 | len = strlen (name); |
137 | ||
f837a861 MM |
138 | if (len > max_id_len) |
139 | max_id_len = len; | |
140 | ||
141 | printf ("#define HAVE_%s ", name); | |
41299f41 TW |
142 | if (strlen (XSTR (insn, 2)) == 0) |
143 | printf ("1\n"); | |
144 | else | |
145 | { | |
146 | /* Write the macro definition, putting \'s at the end of each line, | |
147 | if more than one. */ | |
148 | printf ("("); | |
149 | for (p = XSTR (insn, 2); *p; p++) | |
150 | { | |
151 | if (*p == '\n') | |
152 | printf (" \\\n"); | |
153 | else | |
154 | printf ("%c", *p); | |
155 | } | |
156 | printf (")\n"); | |
157 | } | |
6610a1b0 | 158 | |
f837a861 MM |
159 | /* Save the current insn, so that we can later put out appropriate |
160 | prototypes. At present, most md files have the wrong number of | |
6610a1b0 MM |
161 | arguments for the call insns (call, call_value, call_pop, |
162 | call_value_pop) ignoring the extra arguments that are passed for | |
163 | some machines, so by default, turn off the prototype. */ | |
164 | ||
165 | obstack_ptr = (name[0] == 'c' | |
166 | && (!strcmp (name, "call") | |
167 | || !strcmp (name, "call_value") | |
168 | || !strcmp (name, "call_pop") | |
169 | || !strcmp (name, "call_value_pop"))) | |
f837a861 MM |
170 | ? &call_obstack : &normal_obstack; |
171 | ||
172 | obstack_grow (obstack_ptr, &insn, sizeof (rtx)); | |
41299f41 TW |
173 | } |
174 | \f | |
2778b98d | 175 | PTR |
41299f41 | 176 | xmalloc (size) |
2778b98d | 177 | size_t size; |
41299f41 | 178 | { |
2778b98d | 179 | register PTR val = (PTR) malloc (size); |
41299f41 TW |
180 | |
181 | if (val == 0) | |
182 | fatal ("virtual memory exhausted"); | |
183 | ||
184 | return val; | |
185 | } | |
186 | ||
2778b98d | 187 | PTR |
470b68c0 RH |
188 | xrealloc (old, size) |
189 | PTR old; | |
2778b98d | 190 | size_t size; |
41299f41 | 191 | { |
470b68c0 | 192 | register PTR ptr; |
09d83d25 | 193 | if (old) |
470b68c0 RH |
194 | ptr = (PTR) realloc (old, size); |
195 | else | |
196 | ptr = (PTR) malloc (size); | |
197 | if (!ptr) | |
41299f41 | 198 | fatal ("virtual memory exhausted"); |
470b68c0 | 199 | return ptr; |
41299f41 TW |
200 | } |
201 | ||
41299f41 TW |
202 | int |
203 | main (argc, argv) | |
204 | int argc; | |
205 | char **argv; | |
206 | { | |
207 | rtx desc; | |
f837a861 MM |
208 | rtx dummy; |
209 | rtx *call_insns; | |
210 | rtx *normal_insns; | |
211 | rtx *insn_ptr; | |
41299f41 | 212 | FILE *infile; |
41299f41 TW |
213 | register int c; |
214 | ||
f8b6598e | 215 | progname = "genflags"; |
41299f41 | 216 | obstack_init (rtl_obstack); |
f837a861 MM |
217 | obstack_init (&call_obstack); |
218 | obstack_init (&normal_obstack); | |
41299f41 TW |
219 | |
220 | if (argc <= 1) | |
221 | fatal ("No input file name."); | |
222 | ||
223 | infile = fopen (argv[1], "r"); | |
224 | if (infile == 0) | |
225 | { | |
226 | perror (argv[1]); | |
227 | exit (FATAL_EXIT_CODE); | |
228 | } | |
229 | ||
41299f41 TW |
230 | printf ("/* Generated automatically by the program `genflags'\n\ |
231 | from the machine description file `md'. */\n\n"); | |
232 | ||
233 | /* Read the machine description. */ | |
234 | ||
235 | while (1) | |
236 | { | |
237 | c = read_skip_spaces (infile); | |
238 | if (c == EOF) | |
239 | break; | |
240 | ungetc (c, infile); | |
241 | ||
242 | desc = read_rtx (infile); | |
243 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) | |
244 | gen_insn (desc); | |
245 | } | |
246 | ||
f837a861 | 247 | /* Print out the prototypes now. */ |
0f41302f | 248 | dummy = (rtx) 0; |
f837a861 MM |
249 | obstack_grow (&call_obstack, &dummy, sizeof (rtx)); |
250 | call_insns = (rtx *) obstack_finish (&call_obstack); | |
251 | ||
252 | obstack_grow (&normal_obstack, &dummy, sizeof (rtx)); | |
253 | normal_insns = (rtx *) obstack_finish (&normal_obstack); | |
254 | ||
255 | printf ("\n#ifndef NO_MD_PROTOTYPES\n"); | |
256 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) | |
257 | gen_proto (*insn_ptr); | |
258 | ||
259 | printf ("\n#ifdef MD_CALL_PROTOTYPES\n"); | |
260 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
261 | gen_proto (*insn_ptr); | |
262 | ||
263 | printf ("\n#else /* !MD_CALL_PROTOTYPES */\n"); | |
264 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
265 | gen_nonproto (*insn_ptr); | |
266 | ||
267 | printf ("#endif /* !MD_CALL_PROTOTYPES */\n"); | |
268 | printf ("\n#else /* NO_MD_PROTOTYPES */\n"); | |
269 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) | |
270 | gen_nonproto (*insn_ptr); | |
271 | ||
272 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
273 | gen_nonproto (*insn_ptr); | |
274 | ||
275 | printf ("#endif /* NO_MD_PROTOTYPES */\n"); | |
276 | ||
41299f41 TW |
277 | fflush (stdout); |
278 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
279 | /* NOTREACHED */ | |
280 | return 0; | |
281 | } |