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Commit | Line | Data |
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65963943 | 1 | /* Generate code from machine description to emit insns as rtl. |
d050d723 | 2 | Copyright (C) 1987, 1988, 1991, 1994, 1995, 1997, 1998, 1999, 2000 |
b492151d | 3 | Free Software Foundation, Inc. |
65963943 RK |
4 | |
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
a35311b0 RK |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, |
20 | Boston, MA 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; | |
47 | } *clobber_list; | |
48 | ||
e5f6a288 RK |
49 | /* Records one insn that uses the clobber list. */ |
50 | ||
51 | struct clobber_ent | |
52 | { | |
53 | int code_number; /* Counts only insns. */ | |
54 | struct clobber_ent *next; | |
55 | }; | |
56 | ||
a94ae8f5 KG |
57 | static void max_operand_1 PARAMS ((rtx)); |
58 | static int max_operand_vec PARAMS ((rtx, int)); | |
59 | static void print_code PARAMS ((RTX_CODE)); | |
60 | static void gen_exp PARAMS ((rtx, enum rtx_code)); | |
61 | static void gen_insn PARAMS ((rtx)); | |
62 | static void gen_expand PARAMS ((rtx)); | |
63 | static void gen_split PARAMS ((rtx)); | |
64 | static void output_add_clobbers PARAMS ((void)); | |
65 | static void gen_rtx_scratch PARAMS ((rtx, enum rtx_code)); | |
66 | static void output_peephole2_scratches PARAMS ((rtx)); | |
e009aaf3 JL |
67 | |
68 | \f | |
65963943 RK |
69 | static void |
70 | max_operand_1 (x) | |
71 | rtx x; | |
72 | { | |
73 | register RTX_CODE code; | |
74 | register int i; | |
75 | register int len; | |
6f7d635c | 76 | register const char *fmt; |
65963943 RK |
77 | |
78 | if (x == 0) | |
79 | return; | |
80 | ||
81 | code = GET_CODE (x); | |
82 | ||
83 | if (code == MATCH_OPERAND && XSTR (x, 2) != 0 && *XSTR (x, 2) != '\0') | |
84 | register_constraints = 1; | |
85 | if (code == MATCH_SCRATCH && XSTR (x, 1) != 0 && *XSTR (x, 1) != '\0') | |
86 | register_constraints = 1; | |
87 | if (code == MATCH_OPERAND || code == MATCH_OPERATOR | |
88 | || code == MATCH_PARALLEL) | |
89 | max_opno = MAX (max_opno, XINT (x, 0)); | |
8fabbfe6 | 90 | if (code == MATCH_DUP || code == MATCH_OP_DUP || code == MATCH_PAR_DUP) |
65963943 | 91 | max_dup_opno = MAX (max_dup_opno, XINT (x, 0)); |
ede7cd44 RH |
92 | if (code == MATCH_SCRATCH) |
93 | max_scratch_opno = MAX (max_scratch_opno, XINT (x, 0)); | |
65963943 RK |
94 | |
95 | fmt = GET_RTX_FORMAT (code); | |
96 | len = GET_RTX_LENGTH (code); | |
97 | for (i = 0; i < len; i++) | |
98 | { | |
99 | if (fmt[i] == 'e' || fmt[i] == 'u') | |
100 | max_operand_1 (XEXP (x, i)); | |
101 | else if (fmt[i] == 'E') | |
102 | { | |
103 | int j; | |
104 | for (j = 0; j < XVECLEN (x, i); j++) | |
105 | max_operand_1 (XVECEXP (x, i, j)); | |
106 | } | |
107 | } | |
108 | } | |
109 | ||
110 | static int | |
111 | max_operand_vec (insn, arg) | |
112 | rtx insn; | |
113 | int arg; | |
114 | { | |
115 | register int len = XVECLEN (insn, arg); | |
116 | register int i; | |
117 | ||
118 | max_opno = -1; | |
119 | max_dup_opno = -1; | |
ede7cd44 | 120 | max_scratch_opno = -1; |
65963943 RK |
121 | |
122 | for (i = 0; i < len; i++) | |
123 | max_operand_1 (XVECEXP (insn, arg, i)); | |
124 | ||
125 | return max_opno + 1; | |
126 | } | |
127 | \f | |
128 | static void | |
129 | print_code (code) | |
130 | RTX_CODE code; | |
131 | { | |
5f06c983 | 132 | register const char *p1; |
65963943 | 133 | for (p1 = GET_RTX_NAME (code); *p1; p1++) |
92a438d1 | 134 | putchar (TOUPPER(*p1)); |
65963943 RK |
135 | } |
136 | ||
ede7cd44 RH |
137 | static void |
138 | gen_rtx_scratch (x, subroutine_type) | |
139 | rtx x; | |
140 | enum rtx_code subroutine_type; | |
141 | { | |
142 | if (subroutine_type == DEFINE_PEEPHOLE2) | |
143 | { | |
144 | printf ("operand%d", XINT (x, 0)); | |
145 | } | |
146 | else | |
147 | { | |
148 | printf ("gen_rtx_SCRATCH (%smode)", GET_MODE_NAME (GET_MODE (x))); | |
149 | } | |
150 | } | |
151 | ||
65963943 RK |
152 | /* Print a C expression to construct an RTX just like X, |
153 | substituting any operand references appearing within. */ | |
154 | ||
155 | static void | |
ede7cd44 | 156 | gen_exp (x, subroutine_type) |
65963943 | 157 | rtx x; |
ede7cd44 | 158 | enum rtx_code subroutine_type; |
65963943 RK |
159 | { |
160 | register RTX_CODE code; | |
161 | register int i; | |
162 | register int len; | |
6f7d635c | 163 | register const char *fmt; |
65963943 RK |
164 | |
165 | if (x == 0) | |
166 | { | |
3d678dca | 167 | printf ("NULL_RTX"); |
65963943 RK |
168 | return; |
169 | } | |
170 | ||
171 | code = GET_CODE (x); | |
172 | ||
173 | switch (code) | |
174 | { | |
175 | case MATCH_OPERAND: | |
176 | case MATCH_DUP: | |
177 | printf ("operand%d", XINT (x, 0)); | |
178 | return; | |
179 | ||
180 | case MATCH_OP_DUP: | |
4ceb7595 JC |
181 | printf ("gen_rtx (GET_CODE (operand%d), ", XINT (x, 0)); |
182 | if (GET_MODE (x) == VOIDmode) | |
183 | printf ("GET_MODE (operand%d)", XINT (x, 0)); | |
184 | else | |
185 | printf ("%smode", GET_MODE_NAME (GET_MODE (x))); | |
65963943 RK |
186 | for (i = 0; i < XVECLEN (x, 1); i++) |
187 | { | |
188 | printf (",\n\t\t"); | |
ede7cd44 | 189 | gen_exp (XVECEXP (x, 1, i), subroutine_type); |
65963943 RK |
190 | } |
191 | printf (")"); | |
192 | return; | |
193 | ||
194 | case MATCH_OPERATOR: | |
195 | printf ("gen_rtx (GET_CODE (operand%d)", XINT (x, 0)); | |
196 | printf (", %smode", GET_MODE_NAME (GET_MODE (x))); | |
197 | for (i = 0; i < XVECLEN (x, 2); i++) | |
198 | { | |
199 | printf (",\n\t\t"); | |
ede7cd44 | 200 | gen_exp (XVECEXP (x, 2, i), subroutine_type); |
65963943 RK |
201 | } |
202 | printf (")"); | |
203 | return; | |
204 | ||
205 | case MATCH_PARALLEL: | |
8fabbfe6 | 206 | case MATCH_PAR_DUP: |
65963943 RK |
207 | printf ("operand%d", XINT (x, 0)); |
208 | return; | |
209 | ||
210 | case MATCH_SCRATCH: | |
ede7cd44 | 211 | gen_rtx_scratch (x, subroutine_type); |
65963943 RK |
212 | return; |
213 | ||
214 | case ADDRESS: | |
215 | fatal ("ADDRESS expression code used in named instruction pattern"); | |
216 | ||
217 | case PC: | |
218 | printf ("pc_rtx"); | |
219 | return; | |
220 | ||
221 | case CC0: | |
222 | printf ("cc0_rtx"); | |
223 | return; | |
224 | ||
225 | case CONST_INT: | |
226 | if (INTVAL (x) == 0) | |
3d678dca RS |
227 | printf ("const0_rtx"); |
228 | else if (INTVAL (x) == 1) | |
229 | printf ("const1_rtx"); | |
230 | else if (INTVAL (x) == -1) | |
231 | printf ("constm1_rtx"); | |
232 | else if (INTVAL (x) == STORE_FLAG_VALUE) | |
233 | printf ("const_true_rtx"); | |
234 | else | |
76d31c63 JL |
235 | { |
236 | printf ("GEN_INT ("); | |
237 | printf (HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); | |
238 | printf (")"); | |
239 | } | |
3d678dca RS |
240 | return; |
241 | ||
242 | case CONST_DOUBLE: | |
243 | /* These shouldn't be written in MD files. Instead, the appropriate | |
244 | routines in varasm.c should be called. */ | |
245 | abort (); | |
1d300e19 KG |
246 | |
247 | default: | |
248 | break; | |
65963943 RK |
249 | } |
250 | ||
3b80f6ca | 251 | printf ("gen_rtx_"); |
65963943 | 252 | print_code (code); |
3b80f6ca | 253 | printf (" (%smode", GET_MODE_NAME (GET_MODE (x))); |
65963943 RK |
254 | |
255 | fmt = GET_RTX_FORMAT (code); | |
256 | len = GET_RTX_LENGTH (code); | |
257 | for (i = 0; i < len; i++) | |
258 | { | |
259 | if (fmt[i] == '0') | |
260 | break; | |
a558d864 | 261 | printf (",\n\t"); |
65963943 | 262 | if (fmt[i] == 'e' || fmt[i] == 'u') |
ede7cd44 | 263 | gen_exp (XEXP (x, i), subroutine_type); |
65963943 | 264 | else if (fmt[i] == 'i') |
3d678dca | 265 | printf ("%u", XINT (x, i)); |
65963943 RK |
266 | else if (fmt[i] == 's') |
267 | printf ("\"%s\"", XSTR (x, i)); | |
268 | else if (fmt[i] == 'E') | |
269 | { | |
270 | int j; | |
271 | printf ("gen_rtvec (%d", XVECLEN (x, i)); | |
272 | for (j = 0; j < XVECLEN (x, i); j++) | |
273 | { | |
274 | printf (",\n\t\t"); | |
ede7cd44 | 275 | gen_exp (XVECEXP (x, i, j), subroutine_type); |
65963943 RK |
276 | } |
277 | printf (")"); | |
278 | } | |
279 | else | |
280 | abort (); | |
281 | } | |
282 | printf (")"); | |
283 | } | |
284 | \f | |
285 | /* Generate the `gen_...' function for a DEFINE_INSN. */ | |
286 | ||
287 | static void | |
288 | gen_insn (insn) | |
289 | rtx insn; | |
290 | { | |
291 | int operands; | |
292 | register int i; | |
293 | ||
294 | /* See if the pattern for this insn ends with a group of CLOBBERs of (hard) | |
295 | registers or MATCH_SCRATCHes. If so, store away the information for | |
0f41302f | 296 | later. */ |
65963943 RK |
297 | |
298 | if (XVEC (insn, 1)) | |
299 | { | |
300 | for (i = XVECLEN (insn, 1) - 1; i > 0; i--) | |
301 | if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER | |
302 | || (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != REG | |
303 | && GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH)) | |
304 | break; | |
305 | ||
306 | if (i != XVECLEN (insn, 1) - 1) | |
307 | { | |
e5f6a288 RK |
308 | register struct clobber_pat *p; |
309 | register struct clobber_ent *link | |
310 | = (struct clobber_ent *) xmalloc (sizeof (struct clobber_ent)); | |
311 | register int j; | |
312 | ||
313 | link->code_number = insn_code_number; | |
314 | ||
315 | /* See if any previous CLOBBER_LIST entry is the same as this | |
316 | one. */ | |
317 | ||
318 | for (p = clobber_list; p; p = p->next) | |
319 | { | |
320 | if (p->first_clobber != i + 1 | |
321 | || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1)) | |
322 | continue; | |
323 | ||
324 | for (j = i + 1; j < XVECLEN (insn, 1); j++) | |
325 | { | |
326 | rtx old = XEXP (XVECEXP (p->pattern, 1, j), 0); | |
327 | rtx new = XEXP (XVECEXP (insn, 1, j), 0); | |
328 | ||
329 | /* OLD and NEW are the same if both are to be a SCRATCH | |
f5f178e0 | 330 | of the same mode, |
e5f6a288 | 331 | or if both are registers of the same mode and number. */ |
f5f178e0 RS |
332 | if (! (GET_MODE (old) == GET_MODE (new) |
333 | && ((GET_CODE (old) == MATCH_SCRATCH | |
334 | && GET_CODE (new) == MATCH_SCRATCH) | |
335 | || (GET_CODE (old) == REG && GET_CODE (new) == REG | |
336 | && REGNO (old) == REGNO (new))))) | |
e5f6a288 RK |
337 | break; |
338 | } | |
339 | ||
340 | if (j == XVECLEN (insn, 1)) | |
341 | break; | |
342 | } | |
343 | ||
344 | if (p == 0) | |
345 | { | |
346 | p = (struct clobber_pat *) xmalloc (sizeof (struct clobber_pat)); | |
65963943 | 347 | |
e5f6a288 RK |
348 | p->insns = 0; |
349 | p->pattern = insn; | |
350 | p->first_clobber = i + 1; | |
351 | p->next = clobber_list; | |
352 | clobber_list = p; | |
353 | } | |
354 | ||
355 | link->next = p->insns; | |
356 | p->insns = link; | |
65963943 RK |
357 | } |
358 | } | |
359 | ||
6b6ca844 RK |
360 | /* Don't mention instructions whose names are the null string |
361 | or begin with '*'. They are in the machine description just | |
362 | to be recognized. */ | |
363 | if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*') | |
65963943 RK |
364 | return; |
365 | ||
366 | /* Find out how many operands this function has, | |
367 | and also whether any of them have register constraints. */ | |
368 | register_constraints = 0; | |
369 | operands = max_operand_vec (insn, 1); | |
370 | if (max_dup_opno >= operands) | |
371 | fatal ("match_dup operand number has no match_operand"); | |
372 | ||
373 | /* Output the function name and argument declarations. */ | |
374 | printf ("rtx\ngen_%s (", XSTR (insn, 0)); | |
375 | for (i = 0; i < operands; i++) | |
913d0833 KG |
376 | if (i) |
377 | printf (", operand%d", i); | |
378 | else | |
379 | printf ("operand%d", i); | |
65963943 RK |
380 | printf (")\n"); |
381 | for (i = 0; i < operands; i++) | |
382 | printf (" rtx operand%d;\n", i); | |
383 | printf ("{\n"); | |
384 | ||
385 | /* Output code to construct and return the rtl for the instruction body */ | |
386 | ||
387 | if (XVECLEN (insn, 1) == 1) | |
388 | { | |
389 | printf (" return "); | |
ede7cd44 | 390 | gen_exp (XVECEXP (insn, 1, 0), DEFINE_INSN); |
65963943 RK |
391 | printf (";\n}\n\n"); |
392 | } | |
393 | else | |
394 | { | |
c5c76735 JL |
395 | printf (" return gen_rtx_PARALLEL (VOIDmode, gen_rtvec (%d", |
396 | XVECLEN (insn, 1)); | |
397 | ||
65963943 RK |
398 | for (i = 0; i < XVECLEN (insn, 1); i++) |
399 | { | |
400 | printf (",\n\t\t"); | |
ede7cd44 | 401 | gen_exp (XVECEXP (insn, 1, i), DEFINE_INSN); |
65963943 RK |
402 | } |
403 | printf ("));\n}\n\n"); | |
404 | } | |
405 | } | |
406 | \f | |
407 | /* Generate the `gen_...' function for a DEFINE_EXPAND. */ | |
408 | ||
409 | static void | |
410 | gen_expand (expand) | |
411 | rtx expand; | |
412 | { | |
413 | int operands; | |
414 | register int i; | |
415 | ||
416 | if (strlen (XSTR (expand, 0)) == 0) | |
417 | fatal ("define_expand lacks a name"); | |
418 | if (XVEC (expand, 1) == 0) | |
419 | fatal ("define_expand for %s lacks a pattern", XSTR (expand, 0)); | |
420 | ||
421 | /* Find out how many operands this function has, | |
422 | and also whether any of them have register constraints. */ | |
423 | register_constraints = 0; | |
424 | ||
425 | operands = max_operand_vec (expand, 1); | |
426 | ||
427 | /* Output the function name and argument declarations. */ | |
428 | printf ("rtx\ngen_%s (", XSTR (expand, 0)); | |
429 | for (i = 0; i < operands; i++) | |
913d0833 KG |
430 | if (i) |
431 | printf (", operand%d", i); | |
432 | else | |
433 | printf ("operand%d", i); | |
65963943 RK |
434 | printf (")\n"); |
435 | for (i = 0; i < operands; i++) | |
436 | printf (" rtx operand%d;\n", i); | |
437 | printf ("{\n"); | |
438 | ||
439 | /* If we don't have any C code to write, only one insn is being written, | |
440 | and no MATCH_DUPs are present, we can just return the desired insn | |
441 | like we do for a DEFINE_INSN. This saves memory. */ | |
442 | if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0') | |
443 | && operands > max_dup_opno | |
444 | && XVECLEN (expand, 1) == 1) | |
445 | { | |
446 | printf (" return "); | |
ede7cd44 | 447 | gen_exp (XVECEXP (expand, 1, 0), DEFINE_EXPAND); |
65963943 RK |
448 | printf (";\n}\n\n"); |
449 | return; | |
450 | } | |
451 | ||
452 | /* For each operand referred to only with MATCH_DUPs, | |
453 | make a local variable. */ | |
454 | for (i = operands; i <= max_dup_opno; i++) | |
455 | printf (" rtx operand%d;\n", i); | |
ede7cd44 RH |
456 | for (; i <= max_scratch_opno; i++) |
457 | printf (" rtx operand%d;\n", i); | |
65963943 RK |
458 | printf (" rtx _val = 0;\n"); |
459 | printf (" start_sequence ();\n"); | |
460 | ||
461 | /* The fourth operand of DEFINE_EXPAND is some code to be executed | |
462 | before the actual construction. | |
463 | This code expects to refer to `operands' | |
464 | just as the output-code in a DEFINE_INSN does, | |
465 | but here `operands' is an automatic array. | |
466 | So copy the operand values there before executing it. */ | |
467 | if (XSTR (expand, 3) && *XSTR (expand, 3)) | |
468 | { | |
e2bef702 RH |
469 | printf (" {\n"); |
470 | if (operands > 0 || max_dup_opno >= 0 || max_scratch_opno >= 0) | |
471 | printf (" rtx operands[%d];\n", | |
472 | MAX (operands, MAX (max_scratch_opno, max_dup_opno) + 1)); | |
65963943 RK |
473 | /* Output code to copy the arguments into `operands'. */ |
474 | for (i = 0; i < operands; i++) | |
e2bef702 | 475 | printf (" operands[%d] = operand%d;\n", i, i); |
65963943 RK |
476 | |
477 | /* Output the special code to be executed before the sequence | |
478 | is generated. */ | |
479 | printf ("%s\n", XSTR (expand, 3)); | |
480 | ||
481 | /* Output code to copy the arguments back out of `operands' | |
482 | (unless we aren't going to use them at all). */ | |
483 | if (XVEC (expand, 1) != 0) | |
484 | { | |
485 | for (i = 0; i < operands; i++) | |
e2bef702 | 486 | printf (" operand%d = operands[%d];\n", i, i); |
65963943 | 487 | for (; i <= max_dup_opno; i++) |
e2bef702 | 488 | printf (" operand%d = operands[%d];\n", i, i); |
ede7cd44 | 489 | for (; i <= max_scratch_opno; i++) |
e2bef702 | 490 | printf (" operand%d = operands[%d];\n", i, i); |
65963943 | 491 | } |
e2bef702 | 492 | printf (" }\n"); |
65963943 RK |
493 | } |
494 | ||
495 | /* Output code to construct the rtl for the instruction bodies. | |
496 | Use emit_insn to add them to the sequence being accumulated. | |
497 | But don't do this if the user's code has set `no_more' nonzero. */ | |
498 | ||
499 | for (i = 0; i < XVECLEN (expand, 1); i++) | |
500 | { | |
501 | rtx next = XVECEXP (expand, 1, i); | |
502 | if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) | |
503 | || (GET_CODE (next) == PARALLEL | |
504 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
505 | && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) | |
506 | || GET_CODE (next) == RETURN) | |
507 | printf (" emit_jump_insn ("); | |
508 | else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) | |
509 | || GET_CODE (next) == CALL | |
510 | || (GET_CODE (next) == PARALLEL | |
511 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
512 | && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) | |
513 | || (GET_CODE (next) == PARALLEL | |
514 | && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) | |
515 | printf (" emit_call_insn ("); | |
516 | else if (GET_CODE (next) == CODE_LABEL) | |
517 | printf (" emit_label ("); | |
518 | else if (GET_CODE (next) == MATCH_OPERAND | |
d3ca5cdd | 519 | || GET_CODE (next) == MATCH_DUP |
65963943 | 520 | || GET_CODE (next) == MATCH_OPERATOR |
65963943 | 521 | || GET_CODE (next) == MATCH_OP_DUP |
d3ca5cdd JW |
522 | || GET_CODE (next) == MATCH_PARALLEL |
523 | || GET_CODE (next) == MATCH_PAR_DUP | |
65963943 RK |
524 | || GET_CODE (next) == PARALLEL) |
525 | printf (" emit ("); | |
526 | else | |
527 | printf (" emit_insn ("); | |
ede7cd44 | 528 | gen_exp (next, DEFINE_EXPAND); |
65963943 RK |
529 | printf (");\n"); |
530 | if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC | |
531 | && GET_CODE (SET_SRC (next)) == LABEL_REF) | |
532 | printf (" emit_barrier ();"); | |
533 | } | |
534 | ||
535 | /* Call `gen_sequence' to make a SEQUENCE out of all the | |
536 | insns emitted within this gen_... function. */ | |
537 | ||
65963943 | 538 | printf (" _val = gen_sequence ();\n"); |
65963943 RK |
539 | printf (" end_sequence ();\n"); |
540 | printf (" return _val;\n}\n\n"); | |
541 | } | |
542 | ||
543 | /* Like gen_expand, but generates a SEQUENCE. */ | |
0f41302f | 544 | |
65963943 RK |
545 | static void |
546 | gen_split (split) | |
547 | rtx split; | |
548 | { | |
549 | register int i; | |
550 | int operands; | |
c1b59dce | 551 | const char *name = "split"; |
ede7cd44 RH |
552 | |
553 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
554 | name = "peephole2"; | |
65963943 RK |
555 | |
556 | if (XVEC (split, 0) == 0) | |
ede7cd44 RH |
557 | fatal ("define_%s (definition %d) lacks a pattern", name, |
558 | insn_index_number); | |
65963943 | 559 | else if (XVEC (split, 2) == 0) |
ede7cd44 | 560 | fatal ("define_%s (definition %d) lacks a replacement pattern", name, |
3462dc45 | 561 | insn_index_number); |
65963943 RK |
562 | |
563 | /* Find out how many operands this function has. */ | |
564 | ||
565 | max_operand_vec (split, 2); | |
ede7cd44 | 566 | operands = MAX (max_opno, MAX (max_dup_opno, max_scratch_opno)) + 1; |
65963943 | 567 | |
ede7cd44 RH |
568 | /* Output the prototype, function name and argument declarations. */ |
569 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
570 | { | |
a94ae8f5 | 571 | printf ("extern rtx gen_%s_%d PARAMS ((rtx, rtx *));\n", |
ede7cd44 RH |
572 | name, insn_code_number); |
573 | printf ("rtx\ngen_%s_%d (curr_insn, operands)\n\ | |
574 | rtx curr_insn ATTRIBUTE_UNUSED;\n\ | |
575 | rtx *operands;\n", | |
576 | name, insn_code_number); | |
577 | } | |
578 | else | |
579 | { | |
a94ae8f5 | 580 | printf ("extern rtx gen_split_%d PARAMS ((rtx *));\n", insn_code_number); |
ede7cd44 RH |
581 | printf ("rtx\ngen_%s_%d (operands)\n rtx *operands;\n", name, |
582 | insn_code_number); | |
583 | } | |
65963943 RK |
584 | printf ("{\n"); |
585 | ||
586 | /* Declare all local variables. */ | |
587 | for (i = 0; i < operands; i++) | |
588 | printf (" rtx operand%d;\n", i); | |
91afd8f5 | 589 | printf (" rtx _val = 0;\n"); |
ede7cd44 RH |
590 | |
591 | if (GET_CODE (split) == DEFINE_PEEPHOLE2) | |
592 | output_peephole2_scratches (split); | |
593 | ||
65963943 RK |
594 | printf (" start_sequence ();\n"); |
595 | ||
596 | /* The fourth operand of DEFINE_SPLIT is some code to be executed | |
597 | before the actual construction. */ | |
598 | ||
599 | if (XSTR (split, 3)) | |
600 | printf ("%s\n", XSTR (split, 3)); | |
601 | ||
602 | /* Output code to copy the arguments back out of `operands' */ | |
603 | for (i = 0; i < operands; i++) | |
604 | printf (" operand%d = operands[%d];\n", i, i); | |
605 | ||
606 | /* Output code to construct the rtl for the instruction bodies. | |
607 | Use emit_insn to add them to the sequence being accumulated. | |
608 | But don't do this if the user's code has set `no_more' nonzero. */ | |
609 | ||
610 | for (i = 0; i < XVECLEN (split, 2); i++) | |
611 | { | |
612 | rtx next = XVECEXP (split, 2, i); | |
613 | if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) | |
614 | || (GET_CODE (next) == PARALLEL | |
615 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
616 | && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) | |
617 | || GET_CODE (next) == RETURN) | |
618 | printf (" emit_jump_insn ("); | |
619 | else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) | |
620 | || GET_CODE (next) == CALL | |
621 | || (GET_CODE (next) == PARALLEL | |
622 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
623 | && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) | |
624 | || (GET_CODE (next) == PARALLEL | |
625 | && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) | |
626 | printf (" emit_call_insn ("); | |
627 | else if (GET_CODE (next) == CODE_LABEL) | |
628 | printf (" emit_label ("); | |
629 | else if (GET_CODE (next) == MATCH_OPERAND | |
630 | || GET_CODE (next) == MATCH_OPERATOR | |
631 | || GET_CODE (next) == MATCH_PARALLEL | |
632 | || GET_CODE (next) == MATCH_OP_DUP | |
633 | || GET_CODE (next) == MATCH_DUP | |
634 | || GET_CODE (next) == PARALLEL) | |
635 | printf (" emit ("); | |
636 | else | |
637 | printf (" emit_insn ("); | |
ede7cd44 | 638 | gen_exp (next, GET_CODE (split)); |
65963943 RK |
639 | printf (");\n"); |
640 | if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC | |
641 | && GET_CODE (SET_SRC (next)) == LABEL_REF) | |
642 | printf (" emit_barrier ();"); | |
643 | } | |
644 | ||
645 | /* Call `gen_sequence' to make a SEQUENCE out of all the | |
646 | insns emitted within this gen_... function. */ | |
647 | ||
65963943 | 648 | printf (" _val = gen_sequence ();\n"); |
65963943 RK |
649 | printf (" end_sequence ();\n"); |
650 | printf (" return _val;\n}\n\n"); | |
651 | } | |
652 | \f | |
653 | /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient | |
654 | size for the insn and an INSN_CODE, and inserts the required CLOBBERs at | |
655 | the end of the vector. */ | |
656 | ||
657 | static void | |
658 | output_add_clobbers () | |
659 | { | |
660 | struct clobber_pat *clobber; | |
e5f6a288 | 661 | struct clobber_ent *ent; |
65963943 RK |
662 | int i; |
663 | ||
664 | printf ("\n\nvoid\nadd_clobbers (pattern, insn_code_number)\n"); | |
665 | printf (" rtx pattern;\n int insn_code_number;\n"); | |
666 | printf ("{\n"); | |
65963943 RK |
667 | printf (" switch (insn_code_number)\n"); |
668 | printf (" {\n"); | |
669 | ||
670 | for (clobber = clobber_list; clobber; clobber = clobber->next) | |
671 | { | |
e5f6a288 RK |
672 | for (ent = clobber->insns; ent; ent = ent->next) |
673 | printf (" case %d:\n", ent->code_number); | |
65963943 RK |
674 | |
675 | for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++) | |
676 | { | |
677 | printf (" XVECEXP (pattern, 0, %d) = ", i); | |
ede7cd44 RH |
678 | gen_exp (XVECEXP (clobber->pattern, 1, i), |
679 | GET_CODE (clobber->pattern)); | |
65963943 RK |
680 | printf (";\n"); |
681 | } | |
682 | ||
e5f6a288 | 683 | printf (" break;\n\n"); |
65963943 RK |
684 | } |
685 | ||
686 | printf (" default:\n"); | |
687 | printf (" abort ();\n"); | |
688 | printf (" }\n"); | |
689 | printf ("}\n"); | |
690 | } | |
691 | \f | |
ede7cd44 RH |
692 | /* Generate code to invoke find_free_register () as needed for the |
693 | scratch registers used by the peephole2 pattern in SPLIT. */ | |
694 | ||
695 | static void | |
696 | output_peephole2_scratches (split) | |
697 | rtx split; | |
698 | { | |
699 | int i; | |
700 | int insn_nr = 0; | |
701 | ||
ede7cd44 | 702 | printf (" HARD_REG_SET _regs_allocated;\n"); |
ede7cd44 RH |
703 | printf (" CLEAR_HARD_REG_SET (_regs_allocated);\n"); |
704 | ||
705 | for (i = 0; i < XVECLEN (split, 0); i++) | |
706 | { | |
707 | rtx elt = XVECEXP (split, 0, i); | |
708 | if (GET_CODE (elt) == MATCH_SCRATCH) | |
709 | { | |
710 | int last_insn_nr = insn_nr; | |
711 | int cur_insn_nr = insn_nr; | |
712 | int j; | |
713 | for (j = i + 1; j < XVECLEN (split, 0); j++) | |
714 | if (GET_CODE (XVECEXP (split, 0, j)) == MATCH_DUP) | |
715 | { | |
716 | if (XINT (XVECEXP (split, 0, j), 0) == XINT (elt, 0)) | |
717 | last_insn_nr = cur_insn_nr; | |
718 | } | |
719 | else if (GET_CODE (XVECEXP (split, 0, j)) != MATCH_SCRATCH) | |
720 | cur_insn_nr++; | |
23280139 RH |
721 | |
722 | printf (" if ((operands[%d] = peep2_find_free_register (%d, %d, \"%s\", %smode, &_regs_allocated)) == NULL_RTX)\n\ | |
ede7cd44 RH |
723 | return NULL;\n", |
724 | XINT (elt, 0), | |
23280139 | 725 | insn_nr, last_insn_nr, |
ede7cd44 RH |
726 | XSTR (elt, 1), |
727 | GET_MODE_NAME (GET_MODE (elt))); | |
728 | ||
729 | } | |
730 | else if (GET_CODE (elt) != MATCH_DUP) | |
731 | insn_nr++; | |
732 | } | |
733 | } | |
65963943 | 734 | |
a94ae8f5 | 735 | extern int main PARAMS ((int, char **)); |
c1b59dce | 736 | |
65963943 RK |
737 | int |
738 | main (argc, argv) | |
739 | int argc; | |
740 | char **argv; | |
741 | { | |
742 | rtx desc; | |
65963943 | 743 | |
f8b6598e | 744 | progname = "genemit"; |
65963943 RK |
745 | |
746 | if (argc <= 1) | |
747 | fatal ("No input file name."); | |
748 | ||
c88c0d42 CP |
749 | if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE) |
750 | return (FATAL_EXIT_CODE); | |
65963943 | 751 | |
65963943 RK |
752 | /* Assign sequential codes to all entries in the machine description |
753 | in parallel with the tables in insn-output.c. */ | |
754 | ||
755 | insn_code_number = 0; | |
756 | insn_index_number = 0; | |
757 | ||
758 | printf ("/* Generated automatically by the program `genemit'\n\ | |
759 | from the machine description file `md'. */\n\n"); | |
760 | ||
761 | printf ("#include \"config.h\"\n"); | |
729da3f5 | 762 | printf ("#include \"system.h\"\n"); |
65963943 | 763 | printf ("#include \"rtl.h\"\n"); |
6baf1cc8 | 764 | printf ("#include \"tm_p.h\"\n"); |
49ad7cfa | 765 | printf ("#include \"function.h\"\n"); |
65963943 RK |
766 | printf ("#include \"expr.h\"\n"); |
767 | printf ("#include \"real.h\"\n"); | |
1d300e19 | 768 | printf ("#include \"flags.h\"\n"); |
65963943 | 769 | printf ("#include \"output.h\"\n"); |
7f7f8214 KG |
770 | printf ("#include \"insn-config.h\"\n"); |
771 | printf ("#include \"insn-flags.h\"\n"); | |
772 | printf ("#include \"insn-codes.h\"\n"); | |
ede7cd44 | 773 | printf ("#include \"hard-reg-set.h\"\n"); |
23280139 | 774 | printf ("#include \"recog.h\"\n"); |
ede7cd44 | 775 | printf ("#include \"resource.h\"\n"); |
7f7f8214 | 776 | printf ("#include \"reload.h\"\n\n"); |
53bfe9cd JC |
777 | printf ("#define FAIL return (end_sequence (), _val)\n"); |
778 | printf ("#define DONE return (_val = gen_sequence (), end_sequence (), _val)\n"); | |
65963943 RK |
779 | |
780 | /* Read the machine description. */ | |
781 | ||
782 | while (1) | |
783 | { | |
c88c0d42 | 784 | int line_no; |
65963943 | 785 | |
c88c0d42 CP |
786 | desc = read_md_rtx (&line_no, &insn_code_number); |
787 | if (desc == NULL) | |
788 | break; | |
ede7cd44 | 789 | |
c88c0d42 | 790 | switch (GET_CODE (desc)) |
65963943 | 791 | { |
c88c0d42 CP |
792 | case DEFINE_INSN: |
793 | gen_insn (desc); | |
794 | break; | |
795 | ||
796 | case DEFINE_EXPAND: | |
797 | gen_expand (desc); | |
798 | break; | |
799 | ||
800 | case DEFINE_SPLIT: | |
801 | gen_split (desc); | |
802 | break; | |
803 | ||
804 | case DEFINE_PEEPHOLE2: | |
805 | gen_split (desc); | |
806 | break; | |
807 | ||
808 | default: | |
809 | break; | |
810 | } | |
65963943 RK |
811 | ++insn_index_number; |
812 | } | |
813 | ||
814 | /* Write out the routine to add CLOBBERs to a pattern. */ | |
815 | output_add_clobbers (); | |
816 | ||
65963943 | 817 | fflush (stdout); |
c1b59dce | 818 | return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); |
65963943 | 819 | } |
a995e389 RH |
820 | |
821 | /* Define this so we can link with print-rtl.o to get debug_rtx function. */ | |
822 | const char * | |
823 | get_insn_name (code) | |
c1b59dce | 824 | int code ATTRIBUTE_UNUSED; |
a995e389 RH |
825 | { |
826 | return NULL; | |
827 | } |