Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / contrib / gcc-3.4 / gcc / genflags.c
CommitLineData
003757ed
MD
1/* Generate from machine description:
2 - some flags HAVE_... saying which simple standard instructions are
3 available for this machine.
4 Copyright (C) 1987, 1991, 1995, 1998,
5 1999, 2000, 2003, 2004 Free Software Foundation, Inc.
6
7This file is part of GCC.
8
9GCC is free software; you can redistribute it and/or modify it under
10the terms of the GNU General Public License as published by the Free
11Software Foundation; either version 2, or (at your option) any later
12version.
13
14GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15WARRANTY; without even the implied warranty of MERCHANTABILITY or
16FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17for more details.
18
19You should have received a copy of the GNU General Public License
20along with GCC; see the file COPYING. If not, write to the Free
21Software Foundation, 59 Temple Place - Suite 330, Boston, MA
2202111-1307, USA. */
23
24
25#include "bconfig.h"
26#include "system.h"
27#include "coretypes.h"
28#include "tm.h"
29#include "rtl.h"
30#include "obstack.h"
31#include "errors.h"
32#include "gensupport.h"
33
34/* Obstack to remember insns with. */
35static struct obstack obstack;
36
37/* Max size of names encountered. */
38static int max_id_len;
39
40/* Max operand encountered in a scan over some insn. */
41static int max_opno;
42
43static void max_operand_1 (rtx);
44static int num_operands (rtx);
45static void gen_proto (rtx);
46static void gen_macro (const char *, int, int);
47static void gen_insn (rtx);
48
49/* Count the number of match_operand's found. */
50
51static void
52max_operand_1 (rtx x)
53{
54 RTX_CODE code;
55 int i;
56 int len;
57 const char *fmt;
58
59 if (x == 0)
60 return;
61
62 code = GET_CODE (x);
63
64 if (code == MATCH_OPERAND || code == MATCH_OPERATOR
65 || code == MATCH_PARALLEL)
66 max_opno = MAX (max_opno, XINT (x, 0));
67
68 fmt = GET_RTX_FORMAT (code);
69 len = GET_RTX_LENGTH (code);
70 for (i = 0; i < len; i++)
71 {
72 if (fmt[i] == 'e' || fmt[i] == 'u')
73 max_operand_1 (XEXP (x, i));
74 else if (fmt[i] == 'E')
75 {
76 int j;
77 for (j = 0; j < XVECLEN (x, i); j++)
78 max_operand_1 (XVECEXP (x, i, j));
79 }
80 }
81}
82
83static int
84num_operands (rtx insn)
85{
86 int len = XVECLEN (insn, 1);
87 int i;
88
89 max_opno = -1;
90
91 for (i = 0; i < len; i++)
92 max_operand_1 (XVECEXP (insn, 1, i));
93
94 return max_opno + 1;
95}
96
97/* Print out a wrapper macro for a function which corrects the number
98 of arguments it takes. Any missing arguments are assumed to be at
99 the end. */
100static void
101gen_macro (const char *name, int real, int expect)
102{
103 int i;
104
105 if (real > expect)
106 abort ();
107 if (real == 0)
108 abort ();
109
110 /* #define GEN_CALL(A, B, C, D) gen_call((A), (B)) */
111 fputs ("#define GEN_", stdout);
112 for (i = 0; name[i]; i++)
113 putchar (TOUPPER (name[i]));
114
115 putchar('(');
116 for (i = 0; i < expect - 1; i++)
117 printf ("%c, ", i + 'A');
118 printf ("%c) gen_%s (", i + 'A', name);
119
120 for (i = 0; i < real - 1; i++)
121 printf ("(%c), ", i + 'A');
122 printf ("(%c))\n", i + 'A');
123}
124
125/* Print out prototype information for a generator function. If the
126 insn pattern has been elided, print out a dummy generator that
127 does nothing. */
128
129static void
130gen_proto (rtx insn)
131{
132 int num = num_operands (insn);
133 int i;
134 const char *name = XSTR (insn, 0);
135 int truth = maybe_eval_c_test (XSTR (insn, 2));
136
137 /* Many md files don't refer to the last two operands passed to the
138 call patterns. This means their generator functions will be two
139 arguments too short. Instead of changing every md file to touch
140 those operands, we wrap the prototypes in macros that take the
141 correct number of arguments. */
142 if (name[0] == 'c' || name[0] == 's')
143 {
144 if (!strcmp (name, "call")
145 || !strcmp (name, "call_pop")
146 || !strcmp (name, "sibcall")
147 || !strcmp (name, "sibcall_pop"))
148 gen_macro (name, num, 4);
149 else if (!strcmp (name, "call_value")
150 || !strcmp (name, "call_value_pop")
151 || !strcmp (name, "sibcall_value")
152 || !strcmp (name, "sibcall_value_pop"))
153 gen_macro (name, num, 5);
154 }
155
156 if (truth != 0)
157 printf ("extern rtx gen_%-*s (", max_id_len, name);
158 else
159 printf ("static inline rtx gen_%-*s (", max_id_len, name);
160
161 if (num == 0)
162 fputs ("void", stdout);
163 else
164 {
165 for (i = 1; i < num; i++)
166 fputs ("rtx, ", stdout);
167
168 fputs ("rtx", stdout);
169 }
170
171 puts (");");
172
173 /* Some back ends want to take the address of generator functions,
174 so we cannot simply use #define for these dummy definitions. */
175 if (truth == 0)
176 {
177 printf ("static inline rtx\ngen_%s", name);
178 if (num > 0)
179 {
180 putchar ('(');
181 for (i = 0; i < num-1; i++)
182 printf ("rtx %c ATTRIBUTE_UNUSED, ", 'a' + i);
183 printf ("rtx %c ATTRIBUTE_UNUSED)\n", 'a' + i);
184 }
185 else
186 puts ("(void)");
187 puts ("{\n return 0;\n}");
188 }
189
190}
191
192static void
193gen_insn (rtx insn)
194{
195 const char *name = XSTR (insn, 0);
196 const char *p;
197 int len;
198 int truth = maybe_eval_c_test (XSTR (insn, 2));
199
200 /* Don't mention instructions whose names are the null string
201 or begin with '*'. They are in the machine description just
202 to be recognized. */
203 if (name[0] == 0 || name[0] == '*')
204 return;
205
206 len = strlen (name);
207
208 if (len > max_id_len)
209 max_id_len = len;
210
211 if (truth == 0)
212 /* Emit nothing. */;
213 else if (truth == 1)
214 printf ("#define HAVE_%s 1\n", name);
215 else
216 {
217 /* Write the macro definition, putting \'s at the end of each line,
218 if more than one. */
219 printf ("#define HAVE_%s (", name);
220 for (p = XSTR (insn, 2); *p; p++)
221 {
222 if (IS_VSPACE (*p))
223 fputs (" \\\n", stdout);
224 else
225 putchar (*p);
226 }
227 fputs (")\n", stdout);
228 }
229
230 obstack_grow (&obstack, &insn, sizeof (rtx));
231}
232
233int
234main (int argc, char **argv)
235{
236 rtx desc;
237 rtx dummy;
238 rtx *insns;
239 rtx *insn_ptr;
240
241 progname = "genflags";
242 obstack_init (&obstack);
243
244 /* We need to see all the possibilities. Elided insns may have
245 direct calls to their generators in C code. */
246 insn_elision = 0;
247
248 if (argc <= 1)
249 fatal ("no input file name");
250
251 if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
252 return (FATAL_EXIT_CODE);
253
254 puts ("/* Generated automatically by the program `genflags'");
255 puts (" from the machine description file `md'. */\n");
256 puts ("#ifndef GCC_INSN_FLAGS_H");
257 puts ("#define GCC_INSN_FLAGS_H\n");
258
259 /* Read the machine description. */
260
261 while (1)
262 {
263 int line_no, insn_code_number = 0;
264
265 desc = read_md_rtx (&line_no, &insn_code_number);
266 if (desc == NULL)
267 break;
268 if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
269 gen_insn (desc);
270 }
271
272 /* Print out the prototypes now. */
273 dummy = (rtx) 0;
274 obstack_grow (&obstack, &dummy, sizeof (rtx));
275 insns = (rtx *) obstack_finish (&obstack);
276
277 for (insn_ptr = insns; *insn_ptr; insn_ptr++)
278 gen_proto (*insn_ptr);
279
280 puts("\n#endif /* GCC_INSN_FLAGS_H */");
281
282 if (ferror (stdout) || fflush (stdout) || fclose (stdout))
283 return FATAL_EXIT_CODE;
284
285 return SUCCESS_EXIT_CODE;
286}
287
288/* Define this so we can link with print-rtl.o to get debug_rtx function. */
289const char *
290get_insn_name (int code ATTRIBUTE_UNUSED)
291{
292 return NULL;
293}