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41299f41 | 1 | /* Generate from machine description: |
41299f41 TW |
2 | - some flags HAVE_... saying which simple standard instructions are |
3 | available for this machine. | |
d050d723 JL |
4 | Copyright (C) 1987, 1991, 1995, 1998, |
5 | 1999, 2000 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 | /* Obstacks to remember normal, and call insns. */ |
38 | static struct obstack call_obstack, normal_obstack; | |
39 | ||
40 | /* Max size of names encountered. */ | |
41 | static int max_id_len; | |
42 | ||
706b0f60 ZW |
43 | /* Max operand encountered in a scan over some insn. */ |
44 | static int max_opno; | |
56c0e996 | 45 | |
706b0f60 ZW |
46 | static void max_operand_1 PARAMS ((rtx)); |
47 | static int num_operands PARAMS ((rtx)); | |
48 | static void gen_proto PARAMS ((rtx)); | |
49 | static void gen_nonproto PARAMS ((rtx)); | |
50 | static void gen_insn PARAMS ((rtx)); | |
56c0e996 | 51 | |
f837a861 | 52 | /* Count the number of match_operand's found. */ |
0f41302f | 53 | |
706b0f60 ZW |
54 | static void |
55 | max_operand_1 (x) | |
f837a861 MM |
56 | rtx x; |
57 | { | |
706b0f60 ZW |
58 | register RTX_CODE code; |
59 | register int i; | |
60 | register int len; | |
61 | register const char *fmt; | |
f837a861 | 62 | |
706b0f60 ZW |
63 | if (x == 0) |
64 | return; | |
f837a861 | 65 | |
706b0f60 | 66 | code = GET_CODE (x); |
f837a861 | 67 | |
706b0f60 ZW |
68 | if (code == MATCH_OPERAND || code == MATCH_OPERATOR |
69 | || code == MATCH_PARALLEL) | |
70 | max_opno = MAX (max_opno, XINT (x, 0)); | |
71 | ||
72 | fmt = GET_RTX_FORMAT (code); | |
73 | len = GET_RTX_LENGTH (code); | |
74 | for (i = 0; i < len; i++) | |
f837a861 | 75 | { |
706b0f60 ZW |
76 | if (fmt[i] == 'e' || fmt[i] == 'u') |
77 | max_operand_1 (XEXP (x, i)); | |
78 | else if (fmt[i] == 'E') | |
f837a861 | 79 | { |
706b0f60 ZW |
80 | int j; |
81 | for (j = 0; j < XVECLEN (x, i); j++) | |
82 | max_operand_1 (XVECEXP (x, i, j)); | |
f837a861 MM |
83 | } |
84 | } | |
706b0f60 | 85 | } |
f837a861 | 86 | |
706b0f60 ZW |
87 | static int |
88 | num_operands (insn) | |
89 | rtx insn; | |
90 | { | |
91 | register int len = XVECLEN (insn, 1); | |
92 | register int i; | |
93 | ||
94 | max_opno = -1; | |
95 | ||
96 | for (i = 0; i < len; i++) | |
97 | max_operand_1 (XVECEXP (insn, 1, i)); | |
98 | ||
99 | return max_opno + 1; | |
f837a861 MM |
100 | } |
101 | ||
102 | /* Print out prototype information for a function. */ | |
0f41302f | 103 | |
f837a861 MM |
104 | static void |
105 | gen_proto (insn) | |
106 | rtx insn; | |
107 | { | |
108 | int num = num_operands (insn); | |
a94ae8f5 | 109 | printf ("extern rtx gen_%-*s PARAMS ((", max_id_len, XSTR (insn, 0)); |
f837a861 MM |
110 | |
111 | if (num == 0) | |
112 | printf ("void"); | |
113 | else | |
114 | { | |
115 | while (num-- > 1) | |
116 | printf ("rtx, "); | |
117 | ||
118 | printf ("rtx"); | |
119 | } | |
120 | ||
121 | printf ("));\n"); | |
122 | } | |
123 | ||
124 | /* Print out a function declaration without a prototype. */ | |
0f41302f | 125 | |
f837a861 MM |
126 | static void |
127 | gen_nonproto (insn) | |
128 | rtx insn; | |
129 | { | |
130 | printf ("extern rtx gen_%s ();\n", XSTR (insn, 0)); | |
131 | } | |
132 | ||
41299f41 TW |
133 | static void |
134 | gen_insn (insn) | |
135 | rtx insn; | |
136 | { | |
f837a861 | 137 | char *name = XSTR (insn, 0); |
41299f41 | 138 | char *p; |
f837a861 MM |
139 | struct obstack *obstack_ptr; |
140 | int len; | |
41299f41 | 141 | |
6b6ca844 RK |
142 | /* Don't mention instructions whose names are the null string |
143 | or begin with '*'. They are in the machine description just | |
144 | to be recognized. */ | |
145 | if (name[0] == 0 || name[0] == '*') | |
41299f41 TW |
146 | return; |
147 | ||
6b6ca844 RK |
148 | len = strlen (name); |
149 | ||
f837a861 MM |
150 | if (len > max_id_len) |
151 | max_id_len = len; | |
152 | ||
153 | printf ("#define HAVE_%s ", name); | |
41299f41 TW |
154 | if (strlen (XSTR (insn, 2)) == 0) |
155 | printf ("1\n"); | |
156 | else | |
157 | { | |
158 | /* Write the macro definition, putting \'s at the end of each line, | |
159 | if more than one. */ | |
160 | printf ("("); | |
161 | for (p = XSTR (insn, 2); *p; p++) | |
162 | { | |
163 | if (*p == '\n') | |
164 | printf (" \\\n"); | |
165 | else | |
166 | printf ("%c", *p); | |
167 | } | |
168 | printf (")\n"); | |
169 | } | |
6610a1b0 | 170 | |
f837a861 MM |
171 | /* Save the current insn, so that we can later put out appropriate |
172 | prototypes. At present, most md files have the wrong number of | |
6610a1b0 MM |
173 | arguments for the call insns (call, call_value, call_pop, |
174 | call_value_pop) ignoring the extra arguments that are passed for | |
175 | some machines, so by default, turn off the prototype. */ | |
176 | ||
177 | obstack_ptr = (name[0] == 'c' | |
178 | && (!strcmp (name, "call") | |
179 | || !strcmp (name, "call_value") | |
180 | || !strcmp (name, "call_pop") | |
181 | || !strcmp (name, "call_value_pop"))) | |
f837a861 MM |
182 | ? &call_obstack : &normal_obstack; |
183 | ||
184 | obstack_grow (obstack_ptr, &insn, sizeof (rtx)); | |
41299f41 TW |
185 | } |
186 | \f | |
2778b98d | 187 | PTR |
41299f41 | 188 | xmalloc (size) |
2778b98d | 189 | size_t size; |
41299f41 | 190 | { |
2778b98d | 191 | register PTR val = (PTR) malloc (size); |
41299f41 TW |
192 | |
193 | if (val == 0) | |
194 | fatal ("virtual memory exhausted"); | |
195 | ||
196 | return val; | |
197 | } | |
198 | ||
2778b98d | 199 | PTR |
470b68c0 RH |
200 | xrealloc (old, size) |
201 | PTR old; | |
2778b98d | 202 | size_t size; |
41299f41 | 203 | { |
470b68c0 | 204 | register PTR ptr; |
09d83d25 | 205 | if (old) |
470b68c0 RH |
206 | ptr = (PTR) realloc (old, size); |
207 | else | |
208 | ptr = (PTR) malloc (size); | |
209 | if (!ptr) | |
41299f41 | 210 | fatal ("virtual memory exhausted"); |
470b68c0 | 211 | return ptr; |
41299f41 TW |
212 | } |
213 | ||
a94ae8f5 | 214 | extern int main PARAMS ((int, char **)); |
c1b59dce | 215 | |
41299f41 TW |
216 | int |
217 | main (argc, argv) | |
218 | int argc; | |
219 | char **argv; | |
220 | { | |
221 | rtx desc; | |
f837a861 MM |
222 | rtx dummy; |
223 | rtx *call_insns; | |
224 | rtx *normal_insns; | |
225 | rtx *insn_ptr; | |
41299f41 | 226 | FILE *infile; |
41299f41 TW |
227 | register int c; |
228 | ||
f8b6598e | 229 | progname = "genflags"; |
41299f41 | 230 | obstack_init (rtl_obstack); |
f837a861 MM |
231 | obstack_init (&call_obstack); |
232 | obstack_init (&normal_obstack); | |
41299f41 TW |
233 | |
234 | if (argc <= 1) | |
235 | fatal ("No input file name."); | |
236 | ||
237 | infile = fopen (argv[1], "r"); | |
238 | if (infile == 0) | |
239 | { | |
240 | perror (argv[1]); | |
c1b59dce | 241 | return (FATAL_EXIT_CODE); |
41299f41 | 242 | } |
bcdaba58 | 243 | read_rtx_filename = argv[1]; |
41299f41 | 244 | |
41299f41 TW |
245 | printf ("/* Generated automatically by the program `genflags'\n\ |
246 | from the machine description file `md'. */\n\n"); | |
247 | ||
248 | /* Read the machine description. */ | |
249 | ||
250 | while (1) | |
251 | { | |
252 | c = read_skip_spaces (infile); | |
253 | if (c == EOF) | |
254 | break; | |
255 | ungetc (c, infile); | |
256 | ||
257 | desc = read_rtx (infile); | |
258 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) | |
259 | gen_insn (desc); | |
260 | } | |
261 | ||
f837a861 | 262 | /* Print out the prototypes now. */ |
0f41302f | 263 | dummy = (rtx) 0; |
f837a861 MM |
264 | obstack_grow (&call_obstack, &dummy, sizeof (rtx)); |
265 | call_insns = (rtx *) obstack_finish (&call_obstack); | |
266 | ||
267 | obstack_grow (&normal_obstack, &dummy, sizeof (rtx)); | |
268 | normal_insns = (rtx *) obstack_finish (&normal_obstack); | |
269 | ||
f837a861 MM |
270 | for (insn_ptr = normal_insns; *insn_ptr; insn_ptr++) |
271 | gen_proto (*insn_ptr); | |
272 | ||
273 | printf ("\n#ifdef MD_CALL_PROTOTYPES\n"); | |
274 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
275 | gen_proto (*insn_ptr); | |
276 | ||
277 | printf ("\n#else /* !MD_CALL_PROTOTYPES */\n"); | |
278 | for (insn_ptr = call_insns; *insn_ptr; insn_ptr++) | |
279 | gen_nonproto (*insn_ptr); | |
280 | ||
281 | printf ("#endif /* !MD_CALL_PROTOTYPES */\n"); | |
f837a861 | 282 | |
41299f41 | 283 | fflush (stdout); |
c1b59dce | 284 | return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
41299f41 | 285 | } |
a995e389 RH |
286 | |
287 | /* Define this so we can link with print-rtl.o to get debug_rtx function. */ | |
288 | const char * | |
289 | get_insn_name (code) | |
c1b59dce | 290 | int code ATTRIBUTE_UNUSED; |
a995e389 RH |
291 | { |
292 | return NULL; | |
293 | } |