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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. | |
23a5b65a | 4 | Copyright (C) 1987-2014 Free Software Foundation, Inc. |
41299f41 | 5 | |
1322177d | 6 | This file is part of GCC. |
41299f41 | 7 | |
1322177d LB |
8 | GCC is free software; you can redistribute it and/or modify it under |
9 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 10 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 11 | version. |
41299f41 | 12 | |
1322177d LB |
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
41299f41 TW |
17 | |
18 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
41299f41 TW |
21 | |
22 | ||
4977bab6 | 23 | #include "bconfig.h" |
0b93b64e | 24 | #include "system.h" |
4977bab6 ZW |
25 | #include "coretypes.h" |
26 | #include "tm.h" | |
41299f41 TW |
27 | #include "rtl.h" |
28 | #include "obstack.h" | |
f8b6598e | 29 | #include "errors.h" |
10692477 | 30 | #include "read-md.h" |
c88c0d42 | 31 | #include "gensupport.h" |
41299f41 | 32 | |
f45c9d95 ZW |
33 | /* Obstack to remember insns with. */ |
34 | static struct obstack obstack; | |
f837a861 MM |
35 | |
36 | /* Max size of names encountered. */ | |
37 | static int max_id_len; | |
38 | ||
706b0f60 ZW |
39 | /* Max operand encountered in a scan over some insn. */ |
40 | static int max_opno; | |
56c0e996 | 41 | |
3d7aafde AJ |
42 | static void max_operand_1 (rtx); |
43 | static int num_operands (rtx); | |
44 | static void gen_proto (rtx); | |
45 | static void gen_macro (const char *, int, int); | |
7ddf71e3 | 46 | static void gen_insn (int, rtx); |
56c0e996 | 47 | |
f837a861 | 48 | /* Count the number of match_operand's found. */ |
0f41302f | 49 | |
706b0f60 | 50 | static void |
3d7aafde | 51 | max_operand_1 (rtx x) |
f837a861 | 52 | { |
b3694847 SS |
53 | RTX_CODE code; |
54 | int i; | |
55 | int len; | |
56 | const char *fmt; | |
f837a861 | 57 | |
706b0f60 ZW |
58 | if (x == 0) |
59 | return; | |
f837a861 | 60 | |
706b0f60 | 61 | code = GET_CODE (x); |
f837a861 | 62 | |
706b0f60 ZW |
63 | if (code == MATCH_OPERAND || code == MATCH_OPERATOR |
64 | || code == MATCH_PARALLEL) | |
65 | max_opno = MAX (max_opno, XINT (x, 0)); | |
66 | ||
67 | fmt = GET_RTX_FORMAT (code); | |
68 | len = GET_RTX_LENGTH (code); | |
69 | for (i = 0; i < len; i++) | |
f837a861 | 70 | { |
706b0f60 ZW |
71 | if (fmt[i] == 'e' || fmt[i] == 'u') |
72 | max_operand_1 (XEXP (x, i)); | |
73 | else if (fmt[i] == 'E') | |
f837a861 | 74 | { |
706b0f60 ZW |
75 | int j; |
76 | for (j = 0; j < XVECLEN (x, i); j++) | |
77 | max_operand_1 (XVECEXP (x, i, j)); | |
f837a861 MM |
78 | } |
79 | } | |
706b0f60 | 80 | } |
f837a861 | 81 | |
706b0f60 | 82 | static int |
3d7aafde | 83 | num_operands (rtx insn) |
706b0f60 | 84 | { |
b3694847 SS |
85 | int len = XVECLEN (insn, 1); |
86 | int i; | |
706b0f60 ZW |
87 | |
88 | max_opno = -1; | |
89 | ||
90 | for (i = 0; i < len; i++) | |
91 | max_operand_1 (XVECEXP (insn, 1, i)); | |
92 | ||
93 | return max_opno + 1; | |
f837a861 MM |
94 | } |
95 | ||
f45c9d95 ZW |
96 | /* Print out a wrapper macro for a function which corrects the number |
97 | of arguments it takes. Any missing arguments are assumed to be at | |
98 | the end. */ | |
99 | static void | |
3d7aafde | 100 | gen_macro (const char *name, int real, int expect) |
f45c9d95 ZW |
101 | { |
102 | int i; | |
103 | ||
b2d59f6f NS |
104 | gcc_assert (real <= expect); |
105 | gcc_assert (real); | |
f45c9d95 ZW |
106 | |
107 | /* #define GEN_CALL(A, B, C, D) gen_call((A), (B)) */ | |
108 | fputs ("#define GEN_", stdout); | |
109 | for (i = 0; name[i]; i++) | |
110 | putchar (TOUPPER (name[i])); | |
111 | ||
c3284718 | 112 | putchar ('('); |
f45c9d95 ZW |
113 | for (i = 0; i < expect - 1; i++) |
114 | printf ("%c, ", i + 'A'); | |
115 | printf ("%c) gen_%s (", i + 'A', name); | |
116 | ||
117 | for (i = 0; i < real - 1; i++) | |
118 | printf ("(%c), ", i + 'A'); | |
119 | printf ("(%c))\n", i + 'A'); | |
120 | } | |
121 | ||
2199e5fa ZW |
122 | /* Print out prototype information for a generator function. If the |
123 | insn pattern has been elided, print out a dummy generator that | |
124 | does nothing. */ | |
0f41302f | 125 | |
f837a861 | 126 | static void |
3d7aafde | 127 | gen_proto (rtx insn) |
f837a861 MM |
128 | { |
129 | int num = num_operands (insn); | |
2199e5fa | 130 | int i; |
f45c9d95 | 131 | const char *name = XSTR (insn, 0); |
2199e5fa | 132 | int truth = maybe_eval_c_test (XSTR (insn, 2)); |
f45c9d95 ZW |
133 | |
134 | /* Many md files don't refer to the last two operands passed to the | |
135 | call patterns. This means their generator functions will be two | |
136 | arguments too short. Instead of changing every md file to touch | |
137 | those operands, we wrap the prototypes in macros that take the | |
138 | correct number of arguments. */ | |
139 | if (name[0] == 'c' || name[0] == 's') | |
140 | { | |
141 | if (!strcmp (name, "call") | |
142 | || !strcmp (name, "call_pop") | |
143 | || !strcmp (name, "sibcall") | |
144 | || !strcmp (name, "sibcall_pop")) | |
145 | gen_macro (name, num, 4); | |
146 | else if (!strcmp (name, "call_value") | |
147 | || !strcmp (name, "call_value_pop") | |
148 | || !strcmp (name, "sibcall_value") | |
149 | || !strcmp (name, "sibcall_value_pop")) | |
150 | gen_macro (name, num, 5); | |
151 | } | |
152 | ||
2199e5fa | 153 | if (truth != 0) |
3d7aafde | 154 | printf ("extern rtx gen_%-*s (", max_id_len, name); |
2199e5fa | 155 | else |
3d7aafde | 156 | printf ("static inline rtx gen_%-*s (", max_id_len, name); |
f837a861 MM |
157 | |
158 | if (num == 0) | |
2199e5fa | 159 | fputs ("void", stdout); |
f837a861 MM |
160 | else |
161 | { | |
2199e5fa ZW |
162 | for (i = 1; i < num; i++) |
163 | fputs ("rtx, ", stdout); | |
3d7aafde | 164 | |
2199e5fa | 165 | fputs ("rtx", stdout); |
f837a861 MM |
166 | } |
167 | ||
3d7aafde | 168 | puts (");"); |
2199e5fa ZW |
169 | |
170 | /* Some back ends want to take the address of generator functions, | |
171 | so we cannot simply use #define for these dummy definitions. */ | |
172 | if (truth == 0) | |
173 | { | |
174 | printf ("static inline rtx\ngen_%s", name); | |
175 | if (num > 0) | |
176 | { | |
177 | putchar ('('); | |
178 | for (i = 0; i < num-1; i++) | |
e18476eb BI |
179 | printf ("rtx ARG_UNUSED (%c), ", 'a' + i); |
180 | printf ("rtx ARG_UNUSED (%c))\n", 'a' + i); | |
2199e5fa ZW |
181 | } |
182 | else | |
5671bf27 | 183 | puts ("(void)"); |
2199e5fa ZW |
184 | puts ("{\n return 0;\n}"); |
185 | } | |
f837a861 | 186 | |
f837a861 MM |
187 | } |
188 | ||
41299f41 | 189 | static void |
7ddf71e3 | 190 | gen_insn (int line_no, rtx insn) |
41299f41 | 191 | { |
3cce094d KG |
192 | const char *name = XSTR (insn, 0); |
193 | const char *p; | |
7ddf71e3 | 194 | const char *lt, *gt; |
f837a861 | 195 | int len; |
2199e5fa | 196 | int truth = maybe_eval_c_test (XSTR (insn, 2)); |
41299f41 | 197 | |
b8698a0f | 198 | lt = strchr (name, '<'); |
7ddf71e3 PB |
199 | if (lt && strchr (lt + 1, '>')) |
200 | { | |
201 | message_with_line (line_no, "unresolved iterator"); | |
202 | have_error = 1; | |
203 | return; | |
204 | } | |
205 | ||
b8698a0f | 206 | gt = strchr (name, '>'); |
7ddf71e3 PB |
207 | if (lt || gt) |
208 | { | |
209 | message_with_line (line_no, | |
210 | "unmatched angle brackets, likely " | |
211 | "an error in iterator syntax"); | |
212 | have_error = 1; | |
213 | return; | |
214 | } | |
215 | ||
6b6ca844 RK |
216 | /* Don't mention instructions whose names are the null string |
217 | or begin with '*'. They are in the machine description just | |
218 | to be recognized. */ | |
219 | if (name[0] == 0 || name[0] == '*') | |
41299f41 TW |
220 | return; |
221 | ||
6b6ca844 RK |
222 | len = strlen (name); |
223 | ||
f837a861 MM |
224 | if (len > max_id_len) |
225 | max_id_len = len; | |
226 | ||
2199e5fa | 227 | if (truth == 0) |
e0a21ab9 | 228 | /* Emit nothing. */; |
2199e5fa ZW |
229 | else if (truth == 1) |
230 | printf ("#define HAVE_%s 1\n", name); | |
41299f41 TW |
231 | else |
232 | { | |
233 | /* Write the macro definition, putting \'s at the end of each line, | |
234 | if more than one. */ | |
2199e5fa | 235 | printf ("#define HAVE_%s (", name); |
41299f41 TW |
236 | for (p = XSTR (insn, 2); *p; p++) |
237 | { | |
6b8b9d7b | 238 | if (IS_VSPACE (*p)) |
2199e5fa | 239 | fputs (" \\\n", stdout); |
41299f41 | 240 | else |
2199e5fa | 241 | putchar (*p); |
41299f41 | 242 | } |
2199e5fa | 243 | fputs (")\n", stdout); |
41299f41 | 244 | } |
6610a1b0 | 245 | |
f45c9d95 | 246 | obstack_grow (&obstack, &insn, sizeof (rtx)); |
41299f41 | 247 | } |
41299f41 | 248 | |
41299f41 | 249 | int |
3d7aafde | 250 | main (int argc, char **argv) |
41299f41 TW |
251 | { |
252 | rtx desc; | |
f837a861 | 253 | rtx dummy; |
f45c9d95 | 254 | rtx *insns; |
f837a861 | 255 | rtx *insn_ptr; |
41299f41 | 256 | |
f8b6598e | 257 | progname = "genflags"; |
f45c9d95 | 258 | obstack_init (&obstack); |
41299f41 | 259 | |
2199e5fa ZW |
260 | /* We need to see all the possibilities. Elided insns may have |
261 | direct calls to their generators in C code. */ | |
262 | insn_elision = 0; | |
263 | ||
600ab3fc | 264 | if (!init_rtx_reader_args (argc, argv)) |
c88c0d42 | 265 | return (FATAL_EXIT_CODE); |
3d7aafde | 266 | |
0313e85b ZW |
267 | puts ("/* Generated automatically by the program `genflags'"); |
268 | puts (" from the machine description file `md'. */\n"); | |
269 | puts ("#ifndef GCC_INSN_FLAGS_H"); | |
270 | puts ("#define GCC_INSN_FLAGS_H\n"); | |
41299f41 TW |
271 | |
272 | /* Read the machine description. */ | |
273 | ||
274 | while (1) | |
275 | { | |
c88c0d42 | 276 | int line_no, insn_code_number = 0; |
41299f41 | 277 | |
c88c0d42 CP |
278 | desc = read_md_rtx (&line_no, &insn_code_number); |
279 | if (desc == NULL) | |
280 | break; | |
41299f41 | 281 | if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND) |
7ddf71e3 | 282 | gen_insn (line_no, desc); |
41299f41 TW |
283 | } |
284 | ||
f837a861 | 285 | /* Print out the prototypes now. */ |
0f41302f | 286 | dummy = (rtx) 0; |
f45c9d95 | 287 | obstack_grow (&obstack, &dummy, sizeof (rtx)); |
7973fd2a | 288 | insns = XOBFINISH (&obstack, rtx *); |
f837a861 | 289 | |
f45c9d95 | 290 | for (insn_ptr = insns; *insn_ptr; insn_ptr++) |
f837a861 MM |
291 | gen_proto (*insn_ptr); |
292 | ||
c3284718 | 293 | puts ("\n#endif /* GCC_INSN_FLAGS_H */"); |
0313e85b | 294 | |
7ddf71e3 | 295 | if (have_error || ferror (stdout) || fflush (stdout) || fclose (stdout)) |
0313e85b ZW |
296 | return FATAL_EXIT_CODE; |
297 | ||
298 | return SUCCESS_EXIT_CODE; | |
41299f41 | 299 | } |