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Commit | Line | Data |
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65963943 | 1 | /* Generate code from machine description to emit insns as rtl. |
751aa7cc | 2 | Copyright (C) 1987, 1988, 1991, 1994, 1995, 1997, 1998, 1999, 2000, 2001 |
b492151d | 3 | Free Software Foundation, Inc. |
65963943 | 4 | |
1322177d | 5 | This file is part of GCC. |
65963943 | 6 | |
1322177d LB |
7 | GCC is free software; you can redistribute it and/or modify it under |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
65963943 | 11 | |
1322177d LB |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
65963943 RK |
16 | |
17 | You should have received a copy of the GNU General Public License | |
1322177d LB |
18 | along with GCC; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA | |
20 | 02111-1307, USA. */ | |
65963943 RK |
21 | |
22 | ||
0d64891c | 23 | #include "hconfig.h" |
0b93b64e | 24 | #include "system.h" |
65963943 | 25 | #include "rtl.h" |
f8b6598e | 26 | #include "errors.h" |
c88c0d42 | 27 | #include "gensupport.h" |
65963943 | 28 | |
65963943 | 29 | |
65963943 RK |
30 | static int max_opno; |
31 | static int max_dup_opno; | |
ede7cd44 | 32 | static int max_scratch_opno; |
65963943 RK |
33 | static int register_constraints; |
34 | static int insn_code_number; | |
35 | static int insn_index_number; | |
36 | ||
37 | /* Data structure for recording the patterns of insns that have CLOBBERs. | |
38 | We use this to output a function that adds these CLOBBERs to a | |
39 | previously-allocated PARALLEL expression. */ | |
40 | ||
41 | struct clobber_pat | |
42 | { | |
e5f6a288 | 43 | struct clobber_ent *insns; |
65963943 RK |
44 | rtx pattern; |
45 | int first_clobber; | |
46 | struct clobber_pat *next; | |
751aa7cc | 47 | int has_hard_reg; |
65963943 RK |
48 | } *clobber_list; |
49 | ||
e5f6a288 RK |
50 | /* Records one insn that uses the clobber list. */ |
51 | ||
52 | struct clobber_ent | |
53 | { | |
54 | int code_number; /* Counts only insns. */ | |
55 | struct clobber_ent *next; | |
56 | }; | |
57 | ||
a94ae8f5 KG |
58 | static void max_operand_1 PARAMS ((rtx)); |
59 | static int max_operand_vec PARAMS ((rtx, int)); | |
60 | static void print_code PARAMS ((RTX_CODE)); | |
ab55f58c | 61 | static void gen_exp PARAMS ((rtx, enum rtx_code, char *)); |
821e35ba | 62 | static void gen_insn PARAMS ((rtx, int)); |
a94ae8f5 KG |
63 | static void gen_expand PARAMS ((rtx)); |
64 | static void gen_split PARAMS ((rtx)); | |
65 | static void output_add_clobbers PARAMS ((void)); | |
751aa7cc | 66 | static void output_added_clobbers_hard_reg_p PARAMS ((void)); |
a94ae8f5 KG |
67 | static void gen_rtx_scratch PARAMS ((rtx, enum rtx_code)); |
68 | static void output_peephole2_scratches PARAMS ((rtx)); | |
e009aaf3 JL |
69 | |
70 | \f | |
65963943 RK |
71 | static void |
72 | max_operand_1 (x) | |
73 | rtx x; | |
74 | { | |
b3694847 SS |
75 | RTX_CODE code; |
76 | int i; | |
77 | int len; | |
78 | const char *fmt; | |
65963943 RK |
79 | |
80 | if (x == 0) | |
81 | return; | |
82 | ||
83 | code = GET_CODE (x); | |
84 | ||
85 | if (code == MATCH_OPERAND && XSTR (x, 2) != 0 && *XSTR (x, 2) != '\0') | |
86 | register_constraints = 1; | |
87 | if (code == MATCH_SCRATCH && XSTR (x, 1) != 0 && *XSTR (x, 1) != '\0') | |
88 | register_constraints = 1; | |
89 | if (code == MATCH_OPERAND || code == MATCH_OPERATOR | |
90 | || code == MATCH_PARALLEL) | |
91 | max_opno = MAX (max_opno, XINT (x, 0)); | |
8fabbfe6 | 92 | if (code == MATCH_DUP || code == MATCH_OP_DUP || code == MATCH_PAR_DUP) |
65963943 | 93 | max_dup_opno = MAX (max_dup_opno, XINT (x, 0)); |
ede7cd44 RH |
94 | if (code == MATCH_SCRATCH) |
95 | max_scratch_opno = MAX (max_scratch_opno, XINT (x, 0)); | |
65963943 RK |
96 | |
97 | fmt = GET_RTX_FORMAT (code); | |
98 | len = GET_RTX_LENGTH (code); | |
99 | for (i = 0; i < len; i++) | |
100 | { | |
101 | if (fmt[i] == 'e' || fmt[i] == 'u') | |
102 | max_operand_1 (XEXP (x, i)); | |
103 | else if (fmt[i] == 'E') | |
104 | { | |
105 | int j; | |
106 | for (j = 0; j < XVECLEN (x, i); j++) | |
107 | max_operand_1 (XVECEXP (x, i, j)); | |
108 | } | |
109 | } | |
110 | } | |
111 | ||
112 | static int | |
113 | max_operand_vec (insn, arg) | |
114 | rtx insn; | |
115 | int arg; | |
116 | { | |
b3694847 SS |
117 | int len = XVECLEN (insn, arg); |
118 | int i; | |
65963943 RK |
119 | |
120 | max_opno = -1; | |
121 | max_dup_opno = -1; | |
ede7cd44 | 122 | max_scratch_opno = -1; |
65963943 RK |
123 | |
124 | for (i = 0; i < len; i++) | |
125 | max_operand_1 (XVECEXP (insn, arg, i)); | |
126 | ||
127 | return max_opno + 1; | |
128 | } | |
129 | \f | |
130 | static void | |
131 | print_code (code) | |
132 | RTX_CODE code; | |
133 | { | |
b3694847 | 134 | const char *p1; |
65963943 | 135 | for (p1 = GET_RTX_NAME (code); *p1; p1++) |
92a438d1 | 136 | putchar (TOUPPER(*p1)); |
65963943 RK |
137 | } |
138 | ||
ede7cd44 RH |
139 | static void |
140 | gen_rtx_scratch (x, subroutine_type) | |
141 | rtx x; | |
142 | enum rtx_code subroutine_type; | |
143 | { | |
144 | if (subroutine_type == DEFINE_PEEPHOLE2) | |
145 | { | |
146 | printf ("operand%d", XINT (x, 0)); | |
147 | } | |
148 | else | |
149 | { | |
150 | printf ("gen_rtx_SCRATCH (%smode)", GET_MODE_NAME (GET_MODE (x))); | |
151 | } | |
152 | } | |
153 | ||
65963943 RK |
154 | /* Print a C expression to construct an RTX just like X, |
155 | substituting any operand references appearing within. */ | |
156 | ||
157 | static void | |
ab55f58c | 158 | gen_exp (x, subroutine_type, used) |
65963943 | 159 | rtx x; |
ede7cd44 | 160 | enum rtx_code subroutine_type; |
ab55f58c | 161 | char *used; |
65963943 | 162 | { |
b3694847 SS |
163 | RTX_CODE code; |
164 | int i; | |
165 | int len; | |
166 | const char *fmt; | |
65963943 RK |
167 | |
168 | if (x == 0) | |
169 | { | |
3d678dca | 170 | printf ("NULL_RTX"); |
65963943 RK |
171 | return; |
172 | } | |
173 | ||
174 | code = GET_CODE (x); | |
175 | ||
176 | switch (code) | |
177 | { | |
178 | case MATCH_OPERAND: | |
179 | case MATCH_DUP: | |
ab55f58c RH |
180 | if (used) |
181 | { | |
182 | if (used[XINT (x, 0)]) | |
183 | { | |
184 | printf ("copy_rtx (operand%d)", XINT (x, 0)); | |
185 | return; | |
186 | } | |
187 | used[XINT (x, 0)] = 1; | |
188 | } | |
65963943 RK |
189 | printf ("operand%d", XINT (x, 0)); |
190 | return; | |
191 | ||
192 | case MATCH_OP_DUP: | |
4ceb7595 JC |
193 | printf ("gen_rtx (GET_CODE (operand%d), ", XINT (x, 0)); |
194 | if (GET_MODE (x) == VOIDmode) | |
195 | printf ("GET_MODE (operand%d)", XINT (x, 0)); | |
196 | else | |
197 | printf ("%smode", GET_MODE_NAME (GET_MODE (x))); | |
65963943 RK |
198 | for (i = 0; i < XVECLEN (x, 1); i++) |
199 | { | |
200 | printf (",\n\t\t"); | |
ab55f58c | 201 | gen_exp (XVECEXP (x, 1, i), subroutine_type, used); |
65963943 RK |
202 | } |
203 | printf (")"); | |
204 | return; | |
205 | ||
206 | case MATCH_OPERATOR: | |
207 | printf ("gen_rtx (GET_CODE (operand%d)", XINT (x, 0)); | |
208 | printf (", %smode", GET_MODE_NAME (GET_MODE (x))); | |
209 | for (i = 0; i < XVECLEN (x, 2); i++) | |
210 | { | |
211 | printf (",\n\t\t"); | |
ab55f58c | 212 | gen_exp (XVECEXP (x, 2, i), subroutine_type, used); |
65963943 RK |
213 | } |
214 | printf (")"); | |
215 | return; | |
216 | ||
217 | case MATCH_PARALLEL: | |
8fabbfe6 | 218 | case MATCH_PAR_DUP: |
65963943 RK |
219 | printf ("operand%d", XINT (x, 0)); |
220 | return; | |
221 | ||
222 | case MATCH_SCRATCH: | |
ede7cd44 | 223 | gen_rtx_scratch (x, subroutine_type); |
65963943 RK |
224 | return; |
225 | ||
226 | case ADDRESS: | |
227 | fatal ("ADDRESS expression code used in named instruction pattern"); | |
228 | ||
229 | case PC: | |
230 | printf ("pc_rtx"); | |
231 | return; | |
232 | ||
233 | case CC0: | |
234 | printf ("cc0_rtx"); | |
235 | return; | |
236 | ||
237 | case CONST_INT: | |
238 | if (INTVAL (x) == 0) | |
3d678dca RS |
239 | printf ("const0_rtx"); |
240 | else if (INTVAL (x) == 1) | |
241 | printf ("const1_rtx"); | |
242 | else if (INTVAL (x) == -1) | |
243 | printf ("constm1_rtx"); | |
244 | else if (INTVAL (x) == STORE_FLAG_VALUE) | |
245 | printf ("const_true_rtx"); | |
246 | else | |
76d31c63 JL |
247 | { |
248 | printf ("GEN_INT ("); | |
249 | printf (HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); | |
250 | printf (")"); | |
251 | } | |
3d678dca RS |
252 | return; |
253 | ||
254 | case CONST_DOUBLE: | |
255 | /* These shouldn't be written in MD files. Instead, the appropriate | |
256 | routines in varasm.c should be called. */ | |
257 | abort (); | |
1d300e19 KG |
258 | |
259 | default: | |
260 | break; | |
65963943 RK |
261 | } |
262 | ||
3b80f6ca | 263 | printf ("gen_rtx_"); |
65963943 | 264 | print_code (code); |
3b80f6ca | 265 | printf (" (%smode", GET_MODE_NAME (GET_MODE (x))); |
65963943 RK |
266 | |
267 | fmt = GET_RTX_FORMAT (code); | |
268 | len = GET_RTX_LENGTH (code); | |
269 | for (i = 0; i < len; i++) | |
270 | { | |
271 | if (fmt[i] == '0') | |
272 | break; | |
a558d864 | 273 | printf (",\n\t"); |
65963943 | 274 | if (fmt[i] == 'e' || fmt[i] == 'u') |
ab55f58c | 275 | gen_exp (XEXP (x, i), subroutine_type, used); |
65963943 | 276 | else if (fmt[i] == 'i') |
3d678dca | 277 | printf ("%u", XINT (x, i)); |
65963943 RK |
278 | else if (fmt[i] == 's') |
279 | printf ("\"%s\"", XSTR (x, i)); | |
280 | else if (fmt[i] == 'E') | |
281 | { | |
282 | int j; | |
283 | printf ("gen_rtvec (%d", XVECLEN (x, i)); | |
284 | for (j = 0; j < XVECLEN (x, i); j++) | |
285 | { | |
286 | printf (",\n\t\t"); | |
ab55f58c | 287 | gen_exp (XVECEXP (x, i, j), subroutine_type, used); |
65963943 RK |
288 | } |
289 | printf (")"); | |
290 | } | |
291 | else | |
292 | abort (); | |
293 | } | |
294 | printf (")"); | |
295 | } | |
296 | \f | |
297 | /* Generate the `gen_...' function for a DEFINE_INSN. */ | |
298 | ||
299 | static void | |
821e35ba | 300 | gen_insn (insn, lineno) |
65963943 | 301 | rtx insn; |
821e35ba | 302 | int lineno; |
65963943 RK |
303 | { |
304 | int operands; | |
b3694847 | 305 | int i; |
65963943 RK |
306 | |
307 | /* See if the pattern for this insn ends with a group of CLOBBERs of (hard) | |
308 | registers or MATCH_SCRATCHes. If so, store away the information for | |
0f41302f | 309 | later. */ |
65963943 RK |
310 | |
311 | if (XVEC (insn, 1)) | |
312 | { | |
751aa7cc RK |
313 | int has_hard_reg = 0; |
314 | ||
65963943 | 315 | for (i = XVECLEN (insn, 1) - 1; i > 0; i--) |
751aa7cc RK |
316 | { |
317 | if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER) | |
318 | break; | |
319 | ||
320 | if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) == REG) | |
321 | has_hard_reg = 1; | |
322 | else if (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH) | |
323 | break; | |
324 | } | |
65963943 RK |
325 | |
326 | if (i != XVECLEN (insn, 1) - 1) | |
327 | { | |
b3694847 SS |
328 | struct clobber_pat *p; |
329 | struct clobber_ent *link | |
e5f6a288 | 330 | = (struct clobber_ent *) xmalloc (sizeof (struct clobber_ent)); |
b3694847 | 331 | int j; |
e5f6a288 RK |
332 | |
333 | link->code_number = insn_code_number; | |
334 | ||
335 | /* See if any previous CLOBBER_LIST entry is the same as this | |
336 | one. */ | |
337 | ||
338 | for (p = clobber_list; p; p = p->next) | |
339 | { | |
340 | if (p->first_clobber != i + 1 | |
341 | || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1)) | |
342 | continue; | |
343 | ||
344 | for (j = i + 1; j < XVECLEN (insn, 1); j++) | |
345 | { | |
346 | rtx old = XEXP (XVECEXP (p->pattern, 1, j), 0); | |
347 | rtx new = XEXP (XVECEXP (insn, 1, j), 0); | |
348 | ||
349 | /* OLD and NEW are the same if both are to be a SCRATCH | |
f5f178e0 | 350 | of the same mode, |
e5f6a288 | 351 | or if both are registers of the same mode and number. */ |
f5f178e0 RS |
352 | if (! (GET_MODE (old) == GET_MODE (new) |
353 | && ((GET_CODE (old) == MATCH_SCRATCH | |
354 | && GET_CODE (new) == MATCH_SCRATCH) | |
355 | || (GET_CODE (old) == REG && GET_CODE (new) == REG | |
356 | && REGNO (old) == REGNO (new))))) | |
e5f6a288 RK |
357 | break; |
358 | } | |
359 | ||
360 | if (j == XVECLEN (insn, 1)) | |
361 | break; | |
362 | } | |
363 | ||
364 | if (p == 0) | |
365 | { | |
366 | p = (struct clobber_pat *) xmalloc (sizeof (struct clobber_pat)); | |
65963943 | 367 | |
e5f6a288 RK |
368 | p->insns = 0; |
369 | p->pattern = insn; | |
370 | p->first_clobber = i + 1; | |
371 | p->next = clobber_list; | |
751aa7cc | 372 | p->has_hard_reg = has_hard_reg; |
e5f6a288 RK |
373 | clobber_list = p; |
374 | } | |
375 | ||
376 | link->next = p->insns; | |
377 | p->insns = link; | |
65963943 RK |
378 | } |
379 | } | |
380 | ||
6b6ca844 RK |
381 | /* Don't mention instructions whose names are the null string |
382 | or begin with '*'. They are in the machine description just | |
383 | to be recognized. */ | |
384 | if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*') | |
65963943 RK |
385 | return; |
386 | ||
821e35ba RH |
387 | printf ("/* %s:%d */\n", read_rtx_filename, lineno); |
388 | ||
65963943 RK |
389 | /* Find out how many operands this function has, |
390 | and also whether any of them have register constraints. */ | |
391 | register_constraints = 0; | |
392 | operands = max_operand_vec (insn, 1); | |
393 | if (max_dup_opno >= operands) | |
394 | fatal ("match_dup operand number has no match_operand"); | |
395 | ||
396 | /* Output the function name and argument declarations. */ | |
397 | printf ("rtx\ngen_%s (", XSTR (insn, 0)); | |
398 | for (i = 0; i < operands; i++) | |
913d0833 KG |
399 | if (i) |
400 | printf (", operand%d", i); | |
401 | else | |
402 | printf ("operand%d", i); | |
65963943 RK |
403 | printf (")\n"); |
404 | for (i = 0; i < operands; i++) | |
405 | printf (" rtx operand%d;\n", i); | |
406 | printf ("{\n"); | |
407 | ||
408 | /* Output code to construct and return the rtl for the instruction body */ | |
409 | ||
410 | if (XVECLEN (insn, 1) == 1) | |
411 | { | |
412 | printf (" return "); | |
ab55f58c | 413 | gen_exp (XVECEXP (insn, 1, 0), DEFINE_INSN, NULL); |
65963943 RK |
414 | printf (";\n}\n\n"); |
415 | } | |
416 | else | |
417 | { | |
c5c76735 JL |
418 | printf (" return gen_rtx_PARALLEL (VOIDmode, gen_rtvec (%d", |
419 | XVECLEN (insn, 1)); | |
420 | ||
65963943 RK |
421 | for (i = 0; i < XVECLEN (insn, 1); i++) |
422 | { | |
423 | printf (",\n\t\t"); | |
ab55f58c | 424 | gen_exp (XVECEXP (insn, 1, i), DEFINE_INSN, NULL); |
65963943 RK |
425 | } |
426 | printf ("));\n}\n\n"); | |
427 | } | |
428 | } | |
429 | \f | |
430 | /* Generate the `gen_...' function for a DEFINE_EXPAND. */ | |
431 | ||
432 | static void | |
433 | gen_expand (expand) | |
434 | rtx expand; | |
435 | { | |
436 | int operands; | |
b3694847 | 437 | int i; |
65963943 RK |
438 | |
439 | if (strlen (XSTR (expand, 0)) == 0) | |
440 | fatal ("define_expand lacks a name"); | |
441 | if (XVEC (expand, 1) == 0) | |
442 | fatal ("define_expand for %s lacks a pattern", XSTR (expand, 0)); | |
443 | ||
444 | /* Find out how many operands this function has, | |
445 | and also whether any of them have register constraints. */ | |
446 | register_constraints = 0; | |
447 | ||
448 | operands = max_operand_vec (expand, 1); | |
449 | ||
450 | /* Output the function name and argument declarations. */ | |
451 | printf ("rtx\ngen_%s (", XSTR (expand, 0)); | |
452 | for (i = 0; i < operands; i++) | |
913d0833 KG |
453 | if (i) |
454 | printf (", operand%d", i); | |
455 | else | |
456 | printf ("operand%d", i); | |
65963943 RK |
457 | printf (")\n"); |
458 | for (i = 0; i < operands; i++) | |
459 | printf (" rtx operand%d;\n", i); | |
460 | printf ("{\n"); | |
461 | ||
462 | /* If we don't have any C code to write, only one insn is being written, | |
463 | and no MATCH_DUPs are present, we can just return the desired insn | |
464 | like we do for a DEFINE_INSN. This saves memory. */ | |
465 | if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0') | |
466 | && operands > max_dup_opno | |
467 | && XVECLEN (expand, 1) == 1) | |
468 | { | |
469 | printf (" return "); | |
ab55f58c | 470 | gen_exp (XVECEXP (expand, 1, 0), DEFINE_EXPAND, NULL); |
65963943 RK |
471 | printf (";\n}\n\n"); |
472 | return; | |
473 | } | |
474 | ||
475 | /* For each operand referred to only with MATCH_DUPs, | |
476 | make a local variable. */ | |
477 | for (i = operands; i <= max_dup_opno; i++) | |
478 | printf (" rtx operand%d;\n", i); | |
ede7cd44 | 479 | for (; i <= max_scratch_opno; i++) |
b3656137 | 480 | printf (" rtx operand%d ATTRIBUTE_UNUSED;\n", i); |
65963943 RK |
481 | printf (" rtx _val = 0;\n"); |
482 | printf (" start_sequence ();\n"); | |
483 | ||
484 | /* The fourth operand of DEFINE_EXPAND is some code to be executed | |
485 | before the actual construction. | |
486 | This code expects to refer to `operands' | |
487 | just as the output-code in a DEFINE_INSN does, | |
488 | but here `operands' is an automatic array. | |
489 | So copy the operand values there before executing it. */ | |
490 | if (XSTR (expand, 3) && *XSTR (expand, 3)) | |
491 | { | |
e2bef702 RH |
492 | printf (" {\n"); |
493 | if (operands > 0 || max_dup_opno >= 0 || max_scratch_opno >= 0) | |
494 | printf (" rtx operands[%d];\n", | |
495 | MAX (operands, MAX (max_scratch_opno, max_dup_opno) + 1)); | |
65963943 RK |
496 | /* Output code to copy the arguments into `operands'. */ |
497 | for (i = 0; i < operands; i++) | |
e2bef702 | 498 | printf (" operands[%d] = operand%d;\n", i, i); |
65963943 RK |
499 | |
500 | /* Output the special code to be executed before the sequence | |
501 | is generated. */ | |
502 | printf ("%s\n", XSTR (expand, 3)); | |
503 | ||
504 | /* Output code to copy the arguments back out of `operands' | |
505 | (unless we aren't going to use them at all). */ | |
506 | if (XVEC (expand, 1) != 0) | |
507 | { | |
508 | for (i = 0; i < operands; i++) | |
e2bef702 | 509 | printf (" operand%d = operands[%d];\n", i, i); |
65963943 | 510 | for (; i <= max_dup_opno; i++) |
e2bef702 | 511 | printf (" operand%d = operands[%d];\n", i, i); |
ede7cd44 | 512 | for (; i <= max_scratch_opno; i++) |
e2bef702 | 513 | printf (" operand%d = operands[%d];\n", i, i); |
65963943 | 514 | } |
e2bef702 | 515 | printf (" }\n"); |
65963943 RK |
516 | } |
517 | ||
518 | /* Output code to construct the rtl for the instruction bodies. | |
519 | Use emit_insn to add them to the sequence being accumulated. | |
520 | But don't do this if the user's code has set `no_more' nonzero. */ | |
521 | ||
522 | for (i = 0; i < XVECLEN (expand, 1); i++) | |
523 | { | |
524 | rtx next = XVECEXP (expand, 1, i); | |
525 | if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) | |
526 | || (GET_CODE (next) == PARALLEL | |
527 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
528 | && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) | |
529 | || GET_CODE (next) == RETURN) | |
530 | printf (" emit_jump_insn ("); | |
531 | else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) | |
532 | || GET_CODE (next) == CALL | |
533 | || (GET_CODE (next) == PARALLEL | |
534 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
535 | && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) | |
536 | || (GET_CODE (next) == PARALLEL | |
537 | && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) | |
538 | printf (" emit_call_insn ("); | |
539 | else if (GET_CODE (next) == CODE_LABEL) | |
540 | printf (" emit_label ("); | |
541 | else if (GET_CODE (next) == MATCH_OPERAND | |
d3ca5cdd | 542 | || GET_CODE (next) == MATCH_DUP |
65963943 | 543 | || GET_CODE (next) == MATCH_OPERATOR |
65963943 | 544 | || GET_CODE (next) == MATCH_OP_DUP |
d3ca5cdd JW |
545 | || GET_CODE (next) == MATCH_PARALLEL |
546 | || GET_CODE (next) == MATCH_PAR_DUP | |
65963943 RK |
547 | || GET_CODE (next) == PARALLEL) |
548 | printf (" emit ("); | |
549 | else | |
550 | printf (" emit_insn ("); | |
ab55f58c | 551 | gen_exp (next, DEFINE_EXPAND, NULL); |
65963943 RK |
552 | printf (");\n"); |
553 | if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC | |
554 | && GET_CODE (SET_SRC (next)) == LABEL_REF) | |
555 | printf (" emit_barrier ();"); | |
556 | } | |
557 | ||
558 | /* Call `gen_sequence' to make a SEQUENCE out of all the | |
559 | insns emitted within this gen_... function. */ | |
560 | ||
65963943 | 561 | printf (" _val = gen_sequence ();\n"); |
65963943 RK |
562 | printf (" end_sequence ();\n"); |
563 | printf (" return _val;\n}\n\n"); | |
564 | } | |
565 | ||
566 | /* Like gen_expand, but generates a SEQUENCE. */ | |
0f41302f | 567 | |
65963943 RK |
568 | static void |
569 | gen_split (split) | |
570 | rtx split; | |
571 | { | |
b3694847 | 572 | int i; |
65963943 | 573 | int operands; |
27c38fbe KG |
574 | const char *const name = |
575 | ((GET_CODE (split) == DEFINE_PEEPHOLE2) ? "peephole2" : "split"); | |
751aa7cc | 576 | const char *unused; |
ab55f58c | 577 | char *used; |
ede7cd44 | 578 | |
65963943 | 579 | if (XVEC (split, 0) == 0) |
ede7cd44 RH |
580 | fatal ("define_%s (definition %d) lacks a pattern", name, |
581 | insn_index_number); | |
65963943 | 582 | else if (XVEC (split, 2) == 0) |
ede7cd44 | 583 | fatal ("define_%s (definition %d) lacks a replacement pattern", name, |
3462dc45 | 584 | insn_index_number); |
65963943 RK |
585 | |
586 | /* Find out how many operands this function has. */ | |
587 | ||
588 | max_operand_vec (split, 2); | |
ede7cd44 | 589 | operands = MAX (max_opno, MAX (max_dup_opno, max_scratch_opno)) + 1; |
751aa7cc | 590 | unused = (operands == 0 ? " ATTRIBUTE_UNUSED" : ""); |
ab55f58c | 591 | used = xcalloc (1, operands); |
65963943 | 592 | |
ede7cd44 RH |
593 | /* Output the prototype, function name and argument declarations. */ |
594 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
595 | { | |
a94ae8f5 | 596 | printf ("extern rtx gen_%s_%d PARAMS ((rtx, rtx *));\n", |
ede7cd44 | 597 | name, insn_code_number); |
751aa7cc | 598 | printf ("rtx\ngen_%s_%d (curr_insn, operands)\n", |
ede7cd44 | 599 | name, insn_code_number); |
751aa7cc RK |
600 | printf (" rtx curr_insn ATTRIBUTE_UNUSED;\n"); |
601 | printf (" rtx *operands%s;\n", unused); | |
ede7cd44 RH |
602 | } |
603 | else | |
604 | { | |
a94ae8f5 | 605 | printf ("extern rtx gen_split_%d PARAMS ((rtx *));\n", insn_code_number); |
751aa7cc RK |
606 | printf ("rtx\ngen_%s_%d (operands)\n", name, insn_code_number); |
607 | printf (" rtx *operands%s;\n", unused); | |
ede7cd44 | 608 | } |
65963943 RK |
609 | printf ("{\n"); |
610 | ||
611 | /* Declare all local variables. */ | |
612 | for (i = 0; i < operands; i++) | |
613 | printf (" rtx operand%d;\n", i); | |
91afd8f5 | 614 | printf (" rtx _val = 0;\n"); |
ede7cd44 RH |
615 | |
616 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
617 | output_peephole2_scratches (split); | |
618 | ||
65963943 RK |
619 | printf (" start_sequence ();\n"); |
620 | ||
621 | /* The fourth operand of DEFINE_SPLIT is some code to be executed | |
622 | before the actual construction. */ | |
623 | ||
624 | if (XSTR (split, 3)) | |
625 | printf ("%s\n", XSTR (split, 3)); | |
626 | ||
627 | /* Output code to copy the arguments back out of `operands' */ | |
628 | for (i = 0; i < operands; i++) | |
629 | printf (" operand%d = operands[%d];\n", i, i); | |
630 | ||
631 | /* Output code to construct the rtl for the instruction bodies. | |
632 | Use emit_insn to add them to the sequence being accumulated. | |
633 | But don't do this if the user's code has set `no_more' nonzero. */ | |
634 | ||
635 | for (i = 0; i < XVECLEN (split, 2); i++) | |
636 | { | |
637 | rtx next = XVECEXP (split, 2, i); | |
638 | if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) | |
639 | || (GET_CODE (next) == PARALLEL | |
640 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
641 | && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) | |
642 | || GET_CODE (next) == RETURN) | |
643 | printf (" emit_jump_insn ("); | |
644 | else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) | |
645 | || GET_CODE (next) == CALL | |
646 | || (GET_CODE (next) == PARALLEL | |
647 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
648 | && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) | |
649 | || (GET_CODE (next) == PARALLEL | |
650 | && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) | |
651 | printf (" emit_call_insn ("); | |
652 | else if (GET_CODE (next) == CODE_LABEL) | |
653 | printf (" emit_label ("); | |
654 | else if (GET_CODE (next) == MATCH_OPERAND | |
655 | || GET_CODE (next) == MATCH_OPERATOR | |
656 | || GET_CODE (next) == MATCH_PARALLEL | |
657 | || GET_CODE (next) == MATCH_OP_DUP | |
658 | || GET_CODE (next) == MATCH_DUP | |
659 | || GET_CODE (next) == PARALLEL) | |
660 | printf (" emit ("); | |
661 | else | |
662 | printf (" emit_insn ("); | |
ab55f58c | 663 | gen_exp (next, GET_CODE (split), used); |
65963943 RK |
664 | printf (");\n"); |
665 | if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC | |
666 | && GET_CODE (SET_SRC (next)) == LABEL_REF) | |
667 | printf (" emit_barrier ();"); | |
668 | } | |
669 | ||
670 | /* Call `gen_sequence' to make a SEQUENCE out of all the | |
671 | insns emitted within this gen_... function. */ | |
672 | ||
65963943 | 673 | printf (" _val = gen_sequence ();\n"); |
65963943 RK |
674 | printf (" end_sequence ();\n"); |
675 | printf (" return _val;\n}\n\n"); | |
ab55f58c RH |
676 | |
677 | free (used); | |
65963943 RK |
678 | } |
679 | \f | |
680 | /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient | |
681 | size for the insn and an INSN_CODE, and inserts the required CLOBBERs at | |
682 | the end of the vector. */ | |
683 | ||
684 | static void | |
685 | output_add_clobbers () | |
686 | { | |
687 | struct clobber_pat *clobber; | |
e5f6a288 | 688 | struct clobber_ent *ent; |
65963943 RK |
689 | int i; |
690 | ||
691 | printf ("\n\nvoid\nadd_clobbers (pattern, insn_code_number)\n"); | |
6894579f | 692 | printf (" rtx pattern ATTRIBUTE_UNUSED;\n int insn_code_number;\n"); |
65963943 | 693 | printf ("{\n"); |
65963943 RK |
694 | printf (" switch (insn_code_number)\n"); |
695 | printf (" {\n"); | |
696 | ||
697 | for (clobber = clobber_list; clobber; clobber = clobber->next) | |
698 | { | |
e5f6a288 RK |
699 | for (ent = clobber->insns; ent; ent = ent->next) |
700 | printf (" case %d:\n", ent->code_number); | |
65963943 RK |
701 | |
702 | for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++) | |
703 | { | |
704 | printf (" XVECEXP (pattern, 0, %d) = ", i); | |
ede7cd44 | 705 | gen_exp (XVECEXP (clobber->pattern, 1, i), |
ab55f58c | 706 | GET_CODE (clobber->pattern), NULL); |
65963943 RK |
707 | printf (";\n"); |
708 | } | |
709 | ||
e5f6a288 | 710 | printf (" break;\n\n"); |
65963943 RK |
711 | } |
712 | ||
713 | printf (" default:\n"); | |
714 | printf (" abort ();\n"); | |
715 | printf (" }\n"); | |
716 | printf ("}\n"); | |
717 | } | |
718 | \f | |
751aa7cc RK |
719 | /* Write a function, `added_clobbers_hard_reg_p' this is given an insn_code |
720 | number that needs clobbers and returns 1 if they include a clobber of a | |
721 | hard reg and 0 if they just clobber SCRATCH. */ | |
722 | ||
723 | static void | |
724 | output_added_clobbers_hard_reg_p () | |
725 | { | |
726 | struct clobber_pat *clobber; | |
727 | struct clobber_ent *ent; | |
a29b099d | 728 | int clobber_p, used; |
751aa7cc RK |
729 | |
730 | printf ("\n\nint\nadded_clobbers_hard_reg_p (insn_code_number)\n"); | |
731 | printf (" int insn_code_number;\n"); | |
732 | printf ("{\n"); | |
733 | printf (" switch (insn_code_number)\n"); | |
734 | printf (" {\n"); | |
735 | ||
736 | for (clobber_p = 0; clobber_p <= 1; clobber_p++) | |
737 | { | |
a29b099d | 738 | used = 0; |
751aa7cc RK |
739 | for (clobber = clobber_list; clobber; clobber = clobber->next) |
740 | if (clobber->has_hard_reg == clobber_p) | |
741 | for (ent = clobber->insns; ent; ent = ent->next) | |
a29b099d JJ |
742 | { |
743 | printf (" case %d:\n", ent->code_number); | |
744 | used++; | |
745 | } | |
751aa7cc | 746 | |
a29b099d JJ |
747 | if (used) |
748 | printf (" return %d;\n\n", clobber_p); | |
751aa7cc RK |
749 | } |
750 | ||
751 | printf (" default:\n"); | |
752 | printf (" abort ();\n"); | |
753 | printf (" }\n"); | |
754 | printf ("}\n"); | |
755 | } | |
756 | \f | |
ede7cd44 | 757 | /* Generate code to invoke find_free_register () as needed for the |
dc297297 | 758 | scratch registers used by the peephole2 pattern in SPLIT. */ |
ede7cd44 RH |
759 | |
760 | static void | |
761 | output_peephole2_scratches (split) | |
762 | rtx split; | |
763 | { | |
764 | int i; | |
765 | int insn_nr = 0; | |
766 | ||
ede7cd44 | 767 | printf (" HARD_REG_SET _regs_allocated;\n"); |
ede7cd44 RH |
768 | printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n"); |
769 | ||
770 | for (i = 0; i < XVECLEN (split, 0); i++) | |
771 | { | |
772 | rtx elt = XVECEXP (split, 0, i); | |
773 | if (GET_CODE (elt) == MATCH_SCRATCH) | |
774 | { | |
775 | int last_insn_nr = insn_nr; | |
776 | int cur_insn_nr = insn_nr; | |
777 | int j; | |
778 | for (j = i + 1; j < XVECLEN (split, 0); j++) | |
779 | if (GET_CODE (XVECEXP (split, 0, j)) == MATCH_DUP) | |
780 | { | |
781 | if (XINT (XVECEXP (split, 0, j), 0) == XINT (elt, 0)) | |
782 | last_insn_nr = cur_insn_nr; | |
783 | } | |
784 | else if (GET_CODE (XVECEXP (split, 0, j)) != MATCH_SCRATCH) | |
785 | cur_insn_nr++; | |
23280139 RH |
786 | |
787 | printf (" if ((operands[%d] = peep2_find_free_register (%d, %d, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\ | |
ede7cd44 RH |
788 | return NULL;\n", |
789 | XINT (elt, 0), | |
23280139 | 790 | insn_nr, last_insn_nr, |
ede7cd44 RH |
791 | XSTR (elt, 1), |
792 | GET_MODE_NAME (GET_MODE (elt))); | |
793 | ||
794 | } | |
795 | else if (GET_CODE (elt) != MATCH_DUP) | |
796 | insn_nr++; | |
797 | } | |
798 | } | |
65963943 | 799 | |
a94ae8f5 | 800 | extern int main PARAMS ((int, char **)); |
c1b59dce | 801 | |
65963943 RK |
802 | int |
803 | main (argc, argv) | |
804 | int argc; | |
805 | char **argv; | |
806 | { | |
807 | rtx desc; | |
65963943 | 808 | |
f8b6598e | 809 | progname = "genemit"; |
65963943 RK |
810 | |
811 | if (argc <= 1) | |
1f978f5f | 812 | fatal ("no input file name"); |
65963943 | 813 | |
04d8aa70 | 814 | if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE) |
c88c0d42 | 815 | return (FATAL_EXIT_CODE); |
65963943 | 816 | |
65963943 RK |
817 | /* Assign sequential codes to all entries in the machine description |
818 | in parallel with the tables in insn-output.c. */ | |
819 | ||
820 | insn_code_number = 0; | |
821 | insn_index_number = 0; | |
822 | ||
823 | printf ("/* Generated automatically by the program `genemit'\n\ | |
824 | from the machine description file `md'. */\n\n"); | |
825 | ||
826 | printf ("#include \"config.h\"\n"); | |
729da3f5 | 827 | printf ("#include \"system.h\"\n"); |
65963943 | 828 | printf ("#include \"rtl.h\"\n"); |
6baf1cc8 | 829 | printf ("#include \"tm_p.h\"\n"); |
49ad7cfa | 830 | printf ("#include \"function.h\"\n"); |
65963943 | 831 | printf ("#include \"expr.h\"\n"); |
e78d8e51 | 832 | printf ("#include \"optabs.h\"\n"); |
65963943 | 833 | printf ("#include \"real.h\"\n"); |
1d300e19 | 834 | printf ("#include \"flags.h\"\n"); |
65963943 | 835 | printf ("#include \"output.h\"\n"); |
7f7f8214 | 836 | printf ("#include \"insn-config.h\"\n"); |
ede7cd44 | 837 | printf ("#include \"hard-reg-set.h\"\n"); |
23280139 | 838 | printf ("#include \"recog.h\"\n"); |
ede7cd44 | 839 | printf ("#include \"resource.h\"\n"); |
d80eb1e1 | 840 | printf ("#include \"reload.h\"\n"); |
04f378ce | 841 | printf ("#include \"toplev.h\"\n"); |
d80eb1e1 | 842 | printf ("#include \"ggc.h\"\n\n"); |
53bfe9cd | 843 | printf ("#define FAIL return (end_sequence (), _val)\n"); |
821e35ba | 844 | printf ("#define DONE return (_val = gen_sequence (), end_sequence (), _val)\n\n"); |
65963943 RK |
845 | |
846 | /* Read the machine description. */ | |
847 | ||
848 | while (1) | |
849 | { | |
c88c0d42 | 850 | int line_no; |
65963943 | 851 | |
c88c0d42 CP |
852 | desc = read_md_rtx (&line_no, &insn_code_number); |
853 | if (desc == NULL) | |
854 | break; | |
ede7cd44 | 855 | |
c88c0d42 | 856 | switch (GET_CODE (desc)) |
65963943 | 857 | { |
821e35ba RH |
858 | case DEFINE_INSN: |
859 | gen_insn (desc, line_no); | |
860 | break; | |
861 | ||
862 | case DEFINE_EXPAND: | |
863 | printf ("/* %s:%d */\n", read_rtx_filename, line_no); | |
864 | gen_expand (desc); | |
865 | break; | |
866 | ||
867 | case DEFINE_SPLIT: | |
868 | printf ("/* %s:%d */\n", read_rtx_filename, line_no); | |
869 | gen_split (desc); | |
870 | break; | |
871 | ||
872 | case DEFINE_PEEPHOLE2: | |
873 | printf ("/* %s:%d */\n", read_rtx_filename, line_no); | |
874 | gen_split (desc); | |
875 | break; | |
876 | ||
877 | default: | |
878 | break; | |
879 | } | |
65963943 RK |
880 | ++insn_index_number; |
881 | } | |
882 | ||
751aa7cc RK |
883 | /* Write out the routines to add CLOBBERs to a pattern and say whether they |
884 | clobber a hard reg. */ | |
65963943 | 885 | output_add_clobbers (); |
751aa7cc | 886 | output_added_clobbers_hard_reg_p (); |
65963943 | 887 | |
65963943 | 888 | fflush (stdout); |
c1b59dce | 889 | return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
65963943 | 890 | } |
a995e389 RH |
891 | |
892 | /* Define this so we can link with print-rtl.o to get debug_rtx function. */ | |
893 | const char * | |
894 | get_insn_name (code) | |
c1b59dce | 895 | int code ATTRIBUTE_UNUSED; |
a995e389 RH |
896 | { |
897 | return NULL; | |
898 | } |