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f1814567 C |
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, 1991 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 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 "hconfig.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 (); | |
36 | extern rtx read_rtx (); | |
37 | ||
38 | char *xmalloc (); | |
39 | static void fatal (); | |
40 | void fancy_abort (); | |
41 | ||
42 | /* Names for patterns. Need to allow linking with print-rtl. */ | |
43 | char **insn_name_ptr; | |
44 | ||
45 | /* Obstacks to remember normal, and call insns. */ | |
46 | static struct obstack call_obstack, normal_obstack; | |
47 | ||
48 | /* Max size of names encountered. */ | |
49 | static int max_id_len; | |
50 | ||
51 | /* Count the number of match_operand's found. */ | |
52 | static int | |
53 | num_operands (x) | |
54 | rtx x; | |
55 | { | |
56 | int count = 0; | |
57 | int i, j; | |
58 | enum rtx_code code = GET_CODE (x); | |
59 | char *format_ptr = GET_RTX_FORMAT (code); | |
60 | ||
61 | if (code == MATCH_OPERAND) | |
62 | return 1; | |
63 | ||
64 | if (code == MATCH_OPERATOR || code == MATCH_PARALLEL) | |
65 | count++; | |
66 | ||
67 | for (i = 0; i < GET_RTX_LENGTH (code); i++) | |
68 | { | |
69 | switch (*format_ptr++) | |
70 | { | |
71 | case 'u': | |
72 | case 'e': | |
73 | count += num_operands (XEXP (x, i)); | |
74 | break; | |
75 | ||
76 | case 'E': | |
77 | if (XVEC (x, i) != NULL) | |
78 | for (j = 0; j < XVECLEN (x, i); j++) | |
79 | count += num_operands (XVECEXP (x, i, j)); | |
80 | ||
81 | break; | |
82 | } | |
83 | } | |
84 | ||
85 | return count; | |
86 | } | |
87 | ||
88 | /* Print out prototype information for a function. */ | |
89 | static void | |
90 | gen_proto (insn) | |
91 | rtx insn; | |
92 | { | |
93 | int num = num_operands (insn); | |
94 | printf ("extern rtx gen_%-*s PROTO((", max_id_len, XSTR (insn, 0)); | |
95 | ||
96 | if (num == 0) | |
97 | printf ("void"); | |
98 | else | |
99 | { | |
100 | while (num-- > 1) | |
101 | printf ("rtx, "); | |
102 | ||
103 | printf ("rtx"); | |
104 | } | |
105 | ||
106 | printf ("));\n"); | |
107 | } | |
108 | ||
109 | /* Print out a function declaration without a prototype. */ | |
110 | static void | |
111 | gen_nonproto (insn) | |
112 | rtx insn; | |
113 | { | |
114 | printf ("extern rtx gen_%s ();\n", XSTR (insn, 0)); | |
115 | } | |
116 | ||
117 | static void | |
118 | gen_insn (insn) | |
119 | rtx insn; | |
120 | { | |
121 | char *name = XSTR (insn, 0); | |
122 | char *p; | |
123 | struct obstack *obstack_ptr; | |
124 | int len; | |
125 | ||
126 | /* Don't mention instructions whose names are the null string. | |
127 | They are in the machine description just to be recognized. */ | |
128 | len = strlen (name); | |
129 | if (len == 0) | |
130 | return; | |
131 | ||
132 | if (len > max_id_len) | |
133 | max_id_len = len; | |
134 | ||
135 | printf ("#define HAVE_%s ", name); | |
136 | if (strlen (XSTR (insn, 2)) == 0) | |
137 | printf ("1\n"); | |
138 | else | |
139 | { | |
140 | /* Write the macro definition, putting \'s at the end of each line, | |
141 | if more than one. */ | |
142 | printf ("("); | |
143 | for (p = XSTR (insn, 2); *p; p++) | |
144 | { | |
145 | if (*p == '\n') | |
146 | printf (" \\\n"); | |
147 | else | |
148 | printf ("%c", *p); | |
149 | } | |
150 | printf (")\n"); | |
151 | } | |
152 | ||
153 | /* Save the current insn, so that we can later put out appropriate | |
154 | prototypes. At present, most md files have the wrong number of | |
155 | arguments for the call insns (call, call_value, call_pop, | |
156 | call_value_pop) ignoring the extra arguments that are passed for | |
157 | some machines, so by default, turn off the prototype. */ | |
158 | ||
159 | obstack_ptr = (name[0] == 'c' | |
160 | && (!strcmp (name, "call") | |
161 | || !strcmp (name, "call_value") | |
162 | || !strcmp (name, "call_pop") | |
163 | || !strcmp (name, "call_value_pop"))) | |
164 | ? &call_obstack : &normal_obstack; | |
165 | ||
166 | obstack_grow (obstack_ptr, &insn, sizeof (rtx)); | |
167 | } | |
168 | \f | |
169 | char * | |
170 | xmalloc (size) | |
171 | unsigned size; | |
172 | { | |
173 | register char *val = (char *) malloc (size); | |
174 | ||
175 | if (val == 0) | |
176 | fatal ("virtual memory exhausted"); | |
177 | ||
178 | return val; | |
179 | } | |
180 | ||
181 | char * | |
182 | xrealloc (ptr, size) | |
183 | char *ptr; | |
184 | unsigned size; | |
185 | { | |
186 | char *result = (char *) realloc (ptr, size); | |
187 | if (!result) | |
188 | fatal ("virtual memory exhausted"); | |
189 | return result; | |
190 | } | |
191 | ||
192 | static void | |
193 | fatal (s, a1, a2) | |
194 | char *s; | |
195 | { | |
196 | fprintf (stderr, "genflags: "); | |
197 | fprintf (stderr, s, a1, a2); | |
198 | fprintf (stderr, "\n"); | |
199 | exit (FATAL_EXIT_CODE); | |
200 | } | |
201 | ||
202 | /* More 'friendly' abort that prints the line and file. | |
203 | config.h can #define abort fancy_abort if you like that sort of thing. */ | |
204 | ||
205 | void | |
206 | fancy_abort () | |
207 | { | |
208 | fatal ("Internal gcc abort."); | |
209 | } | |
210 | \f | |
211 | int | |
212 | main (argc, argv) | |
213 | int argc; | |
214 | char **argv; | |
215 | { | |
216 | rtx desc; | |
217 | rtx dummy; | |
218 | rtx *call_insns; | |
219 | rtx *normal_insns; | |
220 | rtx *insn_ptr; | |
221 | FILE *infile; | |
222 | register int c; | |
223 | ||
224 | obstack_init (rtl_obstack); | |
225 | obstack_init (&call_obstack); | |
226 | obstack_init (&normal_obstack); | |
227 | ||
228 | if (argc <= 1) | |
229 | fatal ("No input file name."); | |
230 | ||
231 | infile = fopen (argv[1], "r"); | |
232 | if (infile == 0) | |
233 | { | |
234 | perror (argv[1]); | |
235 | exit (FATAL_EXIT_CODE); | |
236 | } | |
237 | ||
238 | init_rtl (); | |
239 | ||
240 | printf ("/* Generated automatically by the program `genflags'\n\ | |
241 | from the machine description file `md'. */\n\n"); | |
242 | ||
243 | /* Read the machine description. */ | |
244 | ||
245 | while (1) | |
246 | { | |
247 | c = read_skip_spaces (infile); | |
248 | if (c == EOF) | |
249 | break; | |
250 | ungetc (c, infile); | |
251 | ||
252 | desc = read_rtx (infile); | |
253 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) | |
254 | gen_insn (desc); | |
255 | } | |
256 | ||
257 | /* Print out the prototypes now. */ | |
258 | dummy = (rtx)0; | |
259 | obstack_grow (&call_obstack, &dummy, sizeof (rtx)); | |
260 | call_insns = (rtx *) obstack_finish (&call_obstack); | |
261 | ||
262 | obstack_grow (&normal_obstack, &dummy, sizeof (rtx)); | |
263 | normal_insns = (rtx *) obstack_finish (&normal_obstack); | |
264 | ||
265 | printf ("\n#ifndef NO_MD_PROTOTYPES\n"); | |
266 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) | |
267 | gen_proto (*insn_ptr); | |
268 | ||
269 | printf ("\n#ifdef MD_CALL_PROTOTYPES\n"); | |
270 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
271 | gen_proto (*insn_ptr); | |
272 | ||
273 | printf ("\n#else /* !MD_CALL_PROTOTYPES */\n"); | |
274 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
275 | gen_nonproto (*insn_ptr); | |
276 | ||
277 | printf ("#endif /* !MD_CALL_PROTOTYPES */\n"); | |
278 | printf ("\n#else /* NO_MD_PROTOTYPES */\n"); | |
279 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) | |
280 | gen_nonproto (*insn_ptr); | |
281 | ||
282 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
283 | gen_nonproto (*insn_ptr); | |
284 | ||
285 | printf ("#endif /* NO_MD_PROTOTYPES */\n"); | |
286 | ||
287 | fflush (stdout); | |
288 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
289 | /* NOTREACHED */ | |
290 | return 0; | |
291 | } |