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f12b8918 | 1 | /* Generate attribute information (insn-attr.h) from machine description. |
2b21299c | 2 | Copyright (C) 1991, 1994, 1996, 1998, 1999, 2000, 2003, 2004, 2007, 2008, |
88a00ef7 | 3 | 2010, 2011 Free Software Foundation, Inc. |
c9309570 | 4 | Contributed by Richard Kenner (kenner@vlsi1.ultra.nyu.edu) |
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 | 27 | #include "rtl.h" |
f8b6598e | 28 | #include "errors.h" |
10692477 | 29 | #include "read-md.h" |
c88c0d42 | 30 | #include "gensupport.h" |
41299f41 | 31 | |
41299f41 | 32 | |
3d7aafde | 33 | static void gen_attr (rtx); |
ef3fad04 | 34 | |
2b21299c JJ |
35 | static VEC (rtx, heap) *const_attrs, *reservations; |
36 | ||
37 | ||
4beba5da | 38 | static void |
3d7aafde | 39 | gen_attr (rtx attr) |
4beba5da | 40 | { |
c344a866 | 41 | const char *p; |
3d7aafde | 42 | int is_const = GET_CODE (XEXP (attr, 2)) == CONST; |
41299f41 | 43 | |
2b21299c JJ |
44 | if (is_const) |
45 | VEC_safe_push (rtx, heap, const_attrs, attr); | |
46 | ||
f12b8918 | 47 | printf ("#define HAVE_ATTR_%s\n", XSTR (attr, 0)); |
41299f41 | 48 | |
f12b8918 | 49 | /* If numeric attribute, don't need to write an enum. */ |
8f4fe86c RS |
50 | if (GET_CODE (attr) == DEFINE_ENUM_ATTR) |
51 | printf ("extern enum %s get_attr_%s (%s);\n\n", | |
52 | XSTR (attr, 1), XSTR (attr, 0), (is_const ? "void" : "rtx")); | |
41299f41 TW |
53 | else |
54 | { | |
8f4fe86c RS |
55 | p = XSTR (attr, 1); |
56 | if (*p == '\0') | |
57 | printf ("extern int get_attr_%s (%s);\n", XSTR (attr, 0), | |
58 | (is_const ? "void" : "rtx")); | |
59 | else | |
c344a866 JR |
60 | printf ("extern enum attr_%s get_attr_%s (%s);\n\n", |
61 | XSTR (attr, 0), XSTR (attr, 0), (is_const ? "void" : "rtx")); | |
41299f41 TW |
62 | } |
63 | ||
f12b8918 TM |
64 | /* If `length' attribute, write additional function definitions and define |
65 | variables used by `insn_current_length'. */ | |
66 | if (! strcmp (XSTR (attr, 0), "length")) | |
41299f41 | 67 | { |
9a5834ae | 68 | puts ("\ |
3d7aafde AJ |
69 | extern void shorten_branches (rtx);\n\ |
70 | extern int insn_default_length (rtx);\n\ | |
070a7956 | 71 | extern int insn_min_length (rtx);\n\ |
3d7aafde AJ |
72 | extern int insn_variable_length_p (rtx);\n\ |
73 | extern int insn_current_length (rtx);\n\n\ | |
9a5834ae | 74 | #include \"insn-addr.h\"\n"); |
41299f41 TW |
75 | } |
76 | } | |
77 | ||
2b21299c JJ |
78 | /* Check that attribute NAME is used in define_insn_reservation condition |
79 | EXP. Return true if it is. */ | |
80 | static bool | |
81 | check_tune_attr (const char *name, rtx exp) | |
82 | { | |
83 | switch (GET_CODE (exp)) | |
84 | { | |
85 | case AND: | |
86 | if (check_tune_attr (name, XEXP (exp, 0))) | |
87 | return true; | |
88 | return check_tune_attr (name, XEXP (exp, 1)); | |
89 | ||
90 | case IOR: | |
91 | return (check_tune_attr (name, XEXP (exp, 0)) | |
92 | && check_tune_attr (name, XEXP (exp, 1))); | |
93 | ||
94 | case EQ_ATTR: | |
95 | return strcmp (XSTR (exp, 0), name) == 0; | |
96 | ||
97 | default: | |
98 | return false; | |
99 | } | |
100 | } | |
101 | ||
102 | /* Try to find a const attribute (usually cpu or tune) that is used | |
103 | in all define_insn_reservation conditions. */ | |
104 | static bool | |
105 | find_tune_attr (rtx exp) | |
106 | { | |
107 | unsigned int i; | |
108 | rtx attr; | |
109 | ||
110 | switch (GET_CODE (exp)) | |
111 | { | |
112 | case AND: | |
113 | case IOR: | |
114 | if (find_tune_attr (XEXP (exp, 0))) | |
115 | return true; | |
116 | return find_tune_attr (XEXP (exp, 1)); | |
117 | ||
118 | case EQ_ATTR: | |
119 | if (strcmp (XSTR (exp, 0), "alternative") == 0) | |
120 | return false; | |
121 | ||
ac47786e | 122 | FOR_EACH_VEC_ELT (rtx, const_attrs, i, attr) |
2b21299c JJ |
123 | if (strcmp (XSTR (attr, 0), XSTR (exp, 0)) == 0) |
124 | { | |
125 | unsigned int j; | |
126 | rtx resv; | |
127 | ||
ac47786e | 128 | FOR_EACH_VEC_ELT (rtx, reservations, j, resv) |
2b21299c JJ |
129 | if (! check_tune_attr (XSTR (attr, 0), XEXP (resv, 2))) |
130 | return false; | |
131 | return true; | |
132 | } | |
133 | return false; | |
134 | ||
135 | default: | |
136 | return false; | |
137 | } | |
138 | } | |
139 | ||
41299f41 | 140 | int |
3d7aafde | 141 | main (int argc, char **argv) |
41299f41 TW |
142 | { |
143 | rtx desc; | |
f12b8918 TM |
144 | int have_delay = 0; |
145 | int have_annul_true = 0; | |
146 | int have_annul_false = 0; | |
fae15c93 | 147 | int num_insn_reservations = 0; |
41299f41 TW |
148 | int i; |
149 | ||
f8b6598e | 150 | progname = "genattr"; |
41299f41 | 151 | |
600ab3fc | 152 | if (!init_rtx_reader_args (argc, argv)) |
c88c0d42 | 153 | return (FATAL_EXIT_CODE); |
41299f41 | 154 | |
0313e85b ZW |
155 | puts ("/* Generated automatically by the program `genattr'"); |
156 | puts (" from the machine description file `md'. */\n"); | |
157 | puts ("#ifndef GCC_INSN_ATTR_H"); | |
158 | puts ("#define GCC_INSN_ATTR_H\n"); | |
41299f41 | 159 | |
88a00ef7 JM |
160 | puts ("#include \"insn-attr-common.h\"\n"); |
161 | ||
f12b8918 TM |
162 | /* For compatibility, define the attribute `alternative', which is just |
163 | a reference to the variable `which_alternative'. */ | |
164 | ||
0313e85b ZW |
165 | puts ("#define HAVE_ATTR_alternative"); |
166 | puts ("#define get_attr_alternative(insn) which_alternative"); | |
3d7aafde | 167 | |
41299f41 TW |
168 | /* Read the machine description. */ |
169 | ||
170 | while (1) | |
171 | { | |
c88c0d42 CP |
172 | int line_no, insn_code_number; |
173 | ||
174 | desc = read_md_rtx (&line_no, &insn_code_number); | |
175 | if (desc == NULL) | |
41299f41 | 176 | break; |
41299f41 | 177 | |
8f4fe86c RS |
178 | if (GET_CODE (desc) == DEFINE_ATTR |
179 | || GET_CODE (desc) == DEFINE_ENUM_ATTR) | |
f12b8918 | 180 | gen_attr (desc); |
41299f41 | 181 | |
f12b8918 TM |
182 | else if (GET_CODE (desc) == DEFINE_DELAY) |
183 | { | |
184 | if (! have_delay) | |
185 | { | |
3d7aafde AJ |
186 | printf ("extern int num_delay_slots (rtx);\n"); |
187 | printf ("extern int eligible_for_delay (rtx, int, rtx, int);\n\n"); | |
188 | printf ("extern int const_num_delay_slots (rtx);\n\n"); | |
f12b8918 TM |
189 | have_delay = 1; |
190 | } | |
41299f41 | 191 | |
f12b8918 TM |
192 | for (i = 0; i < XVECLEN (desc, 1); i += 3) |
193 | { | |
194 | if (XVECEXP (desc, 1, i + 1) && ! have_annul_true) | |
195 | { | |
196 | printf ("#define ANNUL_IFTRUE_SLOTS\n"); | |
3d7aafde | 197 | printf ("extern int eligible_for_annul_true (rtx, int, rtx, int);\n"); |
f12b8918 TM |
198 | have_annul_true = 1; |
199 | } | |
ef3fad04 | 200 | |
f12b8918 TM |
201 | if (XVECEXP (desc, 1, i + 2) && ! have_annul_false) |
202 | { | |
203 | printf ("#define ANNUL_IFFALSE_SLOTS\n"); | |
3d7aafde | 204 | printf ("extern int eligible_for_annul_false (rtx, int, rtx, int);\n"); |
f12b8918 TM |
205 | have_annul_false = 1; |
206 | } | |
207 | } | |
208 | } | |
ef3fad04 | 209 | |
fae15c93 | 210 | else if (GET_CODE (desc) == DEFINE_INSN_RESERVATION) |
2b21299c JJ |
211 | { |
212 | num_insn_reservations++; | |
213 | VEC_safe_push (rtx, heap, reservations, desc); | |
214 | } | |
f12b8918 | 215 | } |
ef3fad04 | 216 | |
fa0aee89 | 217 | if (num_insn_reservations > 0) |
f12b8918 | 218 | { |
2b21299c JJ |
219 | bool has_tune_attr |
220 | = find_tune_attr (XEXP (VEC_index (rtx, reservations, 0), 2)); | |
fae15c93 VM |
221 | /* Output interface for pipeline hazards recognition based on |
222 | DFA (deterministic finite state automata. */ | |
223 | printf ("\n/* DFA based pipeline interface. */"); | |
d530b07f VM |
224 | printf ("\n#ifndef AUTOMATON_ALTS\n"); |
225 | printf ("#define AUTOMATON_ALTS 0\n"); | |
226 | printf ("#endif\n\n"); | |
fae15c93 VM |
227 | printf ("\n#ifndef AUTOMATON_STATE_ALTS\n"); |
228 | printf ("#define AUTOMATON_STATE_ALTS 0\n"); | |
229 | printf ("#endif\n\n"); | |
230 | printf ("#ifndef CPU_UNITS_QUERY\n"); | |
231 | printf ("#define CPU_UNITS_QUERY 0\n"); | |
232 | printf ("#endif\n\n"); | |
233 | /* Interface itself: */ | |
2b21299c JJ |
234 | if (has_tune_attr) |
235 | { | |
236 | printf ("/* Initialize fn pointers for internal_dfa_insn_code\n"); | |
237 | printf (" and insn_default_latency. */\n"); | |
238 | printf ("extern void init_sched_attrs (void);\n\n"); | |
239 | printf ("/* Internal insn code number used by automata. */\n"); | |
240 | printf ("extern int (*internal_dfa_insn_code) (rtx);\n\n"); | |
241 | printf ("/* Insn latency time defined in define_insn_reservation. */\n"); | |
242 | printf ("extern int (*insn_default_latency) (rtx);\n\n"); | |
243 | } | |
244 | else | |
245 | { | |
246 | printf ("#define init_sched_attrs() do { } while (0)\n\n"); | |
247 | printf ("/* Internal insn code number used by automata. */\n"); | |
248 | printf ("extern int internal_dfa_insn_code (rtx);\n\n"); | |
249 | printf ("/* Insn latency time defined in define_insn_reservation. */\n"); | |
250 | printf ("extern int insn_default_latency (rtx);\n\n"); | |
251 | } | |
fae15c93 VM |
252 | printf ("/* Return nonzero if there is a bypass for given insn\n"); |
253 | printf (" which is a data producer. */\n"); | |
3d7aafde | 254 | printf ("extern int bypass_p (rtx);\n\n"); |
fae15c93 VM |
255 | printf ("/* Insn latency time on data consumed by the 2nd insn.\n"); |
256 | printf (" Use the function if bypass_p returns nonzero for\n"); | |
257 | printf (" the 1st insn. */\n"); | |
3d7aafde | 258 | printf ("extern int insn_latency (rtx, rtx);\n\n"); |
e855c69d AB |
259 | printf ("/* Maximal insn latency time possible of all bypasses for this insn.\n"); |
260 | printf (" Use the function if bypass_p returns nonzero for\n"); | |
261 | printf (" the 1st insn. */\n"); | |
262 | printf ("extern int maximal_insn_latency (rtx);\n\n"); | |
d530b07f | 263 | printf ("\n#if AUTOMATON_ALTS\n"); |
fae15c93 VM |
264 | printf ("/* The following function returns number of alternative\n"); |
265 | printf (" reservations of given insn. It may be used for better\n"); | |
266 | printf (" insns scheduling heuristics. */\n"); | |
3d7aafde | 267 | printf ("extern int insn_alts (rtx);\n\n"); |
d530b07f | 268 | printf ("#endif\n\n"); |
fae15c93 VM |
269 | printf ("/* Maximal possible number of insns waiting results being\n"); |
270 | printf (" produced by insns whose execution is not finished. */\n"); | |
5f2f0edd | 271 | printf ("extern const int max_insn_queue_index;\n\n"); |
fae15c93 VM |
272 | printf ("/* Pointer to data describing current state of DFA. */\n"); |
273 | printf ("typedef void *state_t;\n\n"); | |
274 | printf ("/* Size of the data in bytes. */\n"); | |
3d7aafde | 275 | printf ("extern int state_size (void);\n\n"); |
fae15c93 VM |
276 | printf ("/* Initiate given DFA state, i.e. Set up the state\n"); |
277 | printf (" as all functional units were not reserved. */\n"); | |
3d7aafde | 278 | printf ("extern void state_reset (state_t);\n"); |
fae15c93 VM |
279 | printf ("/* The following function returns negative value if given\n"); |
280 | printf (" insn can be issued in processor state described by given\n"); | |
281 | printf (" DFA state. In this case, the DFA state is changed to\n"); | |
282 | printf (" reflect the current and future reservations by given\n"); | |
283 | printf (" insn. Otherwise the function returns minimal time\n"); | |
284 | printf (" delay to issue the insn. This delay may be zero\n"); | |
285 | printf (" for superscalar or VLIW processors. If the second\n"); | |
286 | printf (" parameter is NULL the function changes given DFA state\n"); | |
287 | printf (" as new processor cycle started. */\n"); | |
3d7aafde | 288 | printf ("extern int state_transition (state_t, rtx);\n"); |
fae15c93 VM |
289 | printf ("\n#if AUTOMATON_STATE_ALTS\n"); |
290 | printf ("/* The following function returns number of possible\n"); | |
291 | printf (" alternative reservations of given insn in given\n"); | |
292 | printf (" DFA state. It may be used for better insns scheduling\n"); | |
293 | printf (" heuristics. By default the function is defined if\n"); | |
294 | printf (" macro AUTOMATON_STATE_ALTS is defined because its\n"); | |
295 | printf (" implementation may require much memory. */\n"); | |
3d7aafde | 296 | printf ("extern int state_alts (state_t, rtx);\n"); |
fae15c93 | 297 | printf ("#endif\n\n"); |
3d7aafde | 298 | printf ("extern int min_issue_delay (state_t, rtx);\n"); |
fae15c93 VM |
299 | printf ("/* The following function returns nonzero if no one insn\n"); |
300 | printf (" can be issued in current DFA state. */\n"); | |
3d7aafde | 301 | printf ("extern int state_dead_lock_p (state_t);\n"); |
fae15c93 VM |
302 | printf ("/* The function returns minimal delay of issue of the 2nd\n"); |
303 | printf (" insn after issuing the 1st insn in given DFA state.\n"); | |
304 | printf (" The 1st insn should be issued in given state (i.e.\n"); | |
305 | printf (" state_transition should return negative value for\n"); | |
306 | printf (" the insn and the state). Data dependencies between\n"); | |
307 | printf (" the insns are ignored by the function. */\n"); | |
308 | printf | |
3d7aafde | 309 | ("extern int min_insn_conflict_delay (state_t, rtx, rtx);\n"); |
fae15c93 VM |
310 | printf ("/* The following function outputs reservations for given\n"); |
311 | printf (" insn as they are described in the corresponding\n"); | |
312 | printf (" define_insn_reservation. */\n"); | |
3d7aafde | 313 | printf ("extern void print_reservation (FILE *, rtx);\n"); |
fae15c93 VM |
314 | printf ("\n#if CPU_UNITS_QUERY\n"); |
315 | printf ("/* The following function returns code of functional unit\n"); | |
316 | printf (" with given name (see define_cpu_unit). */\n"); | |
3d7aafde | 317 | printf ("extern int get_cpu_unit_code (const char *);\n"); |
fae15c93 VM |
318 | printf ("/* The following function returns nonzero if functional\n"); |
319 | printf (" unit with given code is currently reserved in given\n"); | |
320 | printf (" DFA state. */\n"); | |
3d7aafde | 321 | printf ("extern int cpu_unit_reservation_p (state_t, int);\n"); |
dd1b7476 | 322 | printf ("#endif\n\n"); |
1c3d0d93 MK |
323 | printf ("/* The following function returns true if insn\n"); |
324 | printf (" has a dfa reservation. */\n"); | |
325 | printf ("extern bool insn_has_dfa_reservation_p (rtx);\n\n"); | |
30028c85 VM |
326 | printf ("/* Clean insn code cache. It should be called if there\n"); |
327 | printf (" is a chance that condition value in a\n"); | |
328 | printf (" define_insn_reservation will be changed after\n"); | |
329 | printf (" last call of dfa_start. */\n"); | |
3d7aafde | 330 | printf ("extern void dfa_clean_insn_cache (void);\n\n"); |
b8698a0f | 331 | printf ("extern void dfa_clear_single_insn_cache (rtx);\n\n"); |
fae15c93 VM |
332 | printf ("/* Initiate and finish work with DFA. They should be\n"); |
333 | printf (" called as the first and the last interface\n"); | |
334 | printf (" functions. */\n"); | |
3d7aafde AJ |
335 | printf ("extern void dfa_start (void);\n"); |
336 | printf ("extern void dfa_finish (void);\n"); | |
fae15c93 VM |
337 | } |
338 | else | |
339 | { | |
340 | /* Otherwise we do no scheduling, but we need these typedefs | |
341 | in order to avoid uglifying other code with more ifdefs. */ | |
342 | printf ("typedef void *state_t;\n\n"); | |
a224278b | 343 | } |
b29d5f75 | 344 | |
3d7aafde | 345 | /* Output flag masks for use by reorg. |
eaa48dab | 346 | |
593dbe11 | 347 | Flags are used to hold branch direction for use by eligible_for_... */ |
eaa48dab JL |
348 | printf("\n#define ATTR_FLAG_forward\t0x1\n"); |
349 | printf("#define ATTR_FLAG_backward\t0x2\n"); | |
eaa48dab | 350 | |
0313e85b ZW |
351 | puts("\n#endif /* GCC_INSN_ATTR_H */"); |
352 | ||
353 | if (ferror (stdout) || fflush (stdout) || fclose (stdout)) | |
354 | return FATAL_EXIT_CODE; | |
355 | ||
356 | return SUCCESS_EXIT_CODE; | |
41299f41 | 357 | } |