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Commit | Line | Data |
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65963943 | 1 | /* Generate code from machine description to emit insns as rtl. |
5987a4f3 | 2 | Copyright (C) 1987, 88, 91, 94, 95, 97, 1998 Free Software Foundation, Inc. |
65963943 RK |
3 | |
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
a35311b0 RK |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
65963943 RK |
20 | |
21 | ||
0d64891c | 22 | #include "hconfig.h" |
0b93b64e | 23 | #include "system.h" |
65963943 RK |
24 | #include "rtl.h" |
25 | #include "obstack.h" | |
26 | ||
27 | static struct obstack obstack; | |
28 | struct obstack *rtl_obstack = &obstack; | |
29 | ||
30 | #define obstack_chunk_alloc xmalloc | |
31 | #define obstack_chunk_free free | |
32 | ||
0b93b64e | 33 | char *xmalloc PROTO((unsigned)); |
65963943 | 34 | static void fatal (); |
0b93b64e | 35 | void fancy_abort PROTO((void)); |
65963943 RK |
36 | |
37 | static int max_opno; | |
38 | static int max_dup_opno; | |
39 | static int register_constraints; | |
40 | static int insn_code_number; | |
41 | static int insn_index_number; | |
42 | ||
43 | /* Data structure for recording the patterns of insns that have CLOBBERs. | |
44 | We use this to output a function that adds these CLOBBERs to a | |
45 | previously-allocated PARALLEL expression. */ | |
46 | ||
47 | struct clobber_pat | |
48 | { | |
e5f6a288 | 49 | struct clobber_ent *insns; |
65963943 RK |
50 | rtx pattern; |
51 | int first_clobber; | |
52 | struct clobber_pat *next; | |
53 | } *clobber_list; | |
54 | ||
e5f6a288 RK |
55 | /* Records one insn that uses the clobber list. */ |
56 | ||
57 | struct clobber_ent | |
58 | { | |
59 | int code_number; /* Counts only insns. */ | |
60 | struct clobber_ent *next; | |
61 | }; | |
62 | ||
65963943 RK |
63 | static void |
64 | max_operand_1 (x) | |
65 | rtx x; | |
66 | { | |
67 | register RTX_CODE code; | |
68 | register int i; | |
69 | register int len; | |
70 | register char *fmt; | |
71 | ||
72 | if (x == 0) | |
73 | return; | |
74 | ||
75 | code = GET_CODE (x); | |
76 | ||
77 | if (code == MATCH_OPERAND && XSTR (x, 2) != 0 && *XSTR (x, 2) != '\0') | |
78 | register_constraints = 1; | |
79 | if (code == MATCH_SCRATCH && XSTR (x, 1) != 0 && *XSTR (x, 1) != '\0') | |
80 | register_constraints = 1; | |
81 | if (code == MATCH_OPERAND || code == MATCH_OPERATOR | |
82 | || code == MATCH_PARALLEL) | |
83 | max_opno = MAX (max_opno, XINT (x, 0)); | |
8fabbfe6 | 84 | if (code == MATCH_DUP || code == MATCH_OP_DUP || code == MATCH_PAR_DUP) |
65963943 RK |
85 | max_dup_opno = MAX (max_dup_opno, XINT (x, 0)); |
86 | ||
87 | fmt = GET_RTX_FORMAT (code); | |
88 | len = GET_RTX_LENGTH (code); | |
89 | for (i = 0; i < len; i++) | |
90 | { | |
91 | if (fmt[i] == 'e' || fmt[i] == 'u') | |
92 | max_operand_1 (XEXP (x, i)); | |
93 | else if (fmt[i] == 'E') | |
94 | { | |
95 | int j; | |
96 | for (j = 0; j < XVECLEN (x, i); j++) | |
97 | max_operand_1 (XVECEXP (x, i, j)); | |
98 | } | |
99 | } | |
100 | } | |
101 | ||
102 | static int | |
103 | max_operand_vec (insn, arg) | |
104 | rtx insn; | |
105 | int arg; | |
106 | { | |
107 | register int len = XVECLEN (insn, arg); | |
108 | register int i; | |
109 | ||
110 | max_opno = -1; | |
111 | max_dup_opno = -1; | |
112 | ||
113 | for (i = 0; i < len; i++) | |
114 | max_operand_1 (XVECEXP (insn, arg, i)); | |
115 | ||
116 | return max_opno + 1; | |
117 | } | |
118 | \f | |
119 | static void | |
120 | print_code (code) | |
121 | RTX_CODE code; | |
122 | { | |
123 | register char *p1; | |
124 | for (p1 = GET_RTX_NAME (code); *p1; p1++) | |
125 | { | |
126 | if (*p1 >= 'a' && *p1 <= 'z') | |
127 | putchar (*p1 + 'A' - 'a'); | |
128 | else | |
129 | putchar (*p1); | |
130 | } | |
131 | } | |
132 | ||
133 | /* Print a C expression to construct an RTX just like X, | |
134 | substituting any operand references appearing within. */ | |
135 | ||
136 | static void | |
137 | gen_exp (x) | |
138 | rtx x; | |
139 | { | |
140 | register RTX_CODE code; | |
141 | register int i; | |
142 | register int len; | |
143 | register char *fmt; | |
144 | ||
145 | if (x == 0) | |
146 | { | |
3d678dca | 147 | printf ("NULL_RTX"); |
65963943 RK |
148 | return; |
149 | } | |
150 | ||
151 | code = GET_CODE (x); | |
152 | ||
153 | switch (code) | |
154 | { | |
155 | case MATCH_OPERAND: | |
156 | case MATCH_DUP: | |
157 | printf ("operand%d", XINT (x, 0)); | |
158 | return; | |
159 | ||
160 | case MATCH_OP_DUP: | |
161 | printf ("gen_rtx (GET_CODE (operand%d), GET_MODE (operand%d)", | |
162 | XINT (x, 0), XINT (x, 0)); | |
163 | for (i = 0; i < XVECLEN (x, 1); i++) | |
164 | { | |
165 | printf (",\n\t\t"); | |
166 | gen_exp (XVECEXP (x, 1, i)); | |
167 | } | |
168 | printf (")"); | |
169 | return; | |
170 | ||
171 | case MATCH_OPERATOR: | |
172 | printf ("gen_rtx (GET_CODE (operand%d)", XINT (x, 0)); | |
173 | printf (", %smode", GET_MODE_NAME (GET_MODE (x))); | |
174 | for (i = 0; i < XVECLEN (x, 2); i++) | |
175 | { | |
176 | printf (",\n\t\t"); | |
177 | gen_exp (XVECEXP (x, 2, i)); | |
178 | } | |
179 | printf (")"); | |
180 | return; | |
181 | ||
182 | case MATCH_PARALLEL: | |
8fabbfe6 | 183 | case MATCH_PAR_DUP: |
65963943 RK |
184 | printf ("operand%d", XINT (x, 0)); |
185 | return; | |
186 | ||
187 | case MATCH_SCRATCH: | |
3b80f6ca | 188 | printf ("gen_rtx_SCRATCH (%smode)", GET_MODE_NAME (GET_MODE (x))); |
65963943 RK |
189 | return; |
190 | ||
191 | case ADDRESS: | |
192 | fatal ("ADDRESS expression code used in named instruction pattern"); | |
193 | ||
194 | case PC: | |
195 | printf ("pc_rtx"); | |
196 | return; | |
197 | ||
198 | case CC0: | |
199 | printf ("cc0_rtx"); | |
200 | return; | |
201 | ||
202 | case CONST_INT: | |
203 | if (INTVAL (x) == 0) | |
3d678dca RS |
204 | printf ("const0_rtx"); |
205 | else if (INTVAL (x) == 1) | |
206 | printf ("const1_rtx"); | |
207 | else if (INTVAL (x) == -1) | |
208 | printf ("constm1_rtx"); | |
209 | else if (INTVAL (x) == STORE_FLAG_VALUE) | |
210 | printf ("const_true_rtx"); | |
211 | else | |
76d31c63 JL |
212 | { |
213 | printf ("GEN_INT ("); | |
214 | printf (HOST_WIDE_INT_PRINT_DEC, INTVAL (x)); | |
215 | printf (")"); | |
216 | } | |
3d678dca RS |
217 | return; |
218 | ||
219 | case CONST_DOUBLE: | |
220 | /* These shouldn't be written in MD files. Instead, the appropriate | |
221 | routines in varasm.c should be called. */ | |
222 | abort (); | |
1d300e19 KG |
223 | |
224 | default: | |
225 | break; | |
65963943 RK |
226 | } |
227 | ||
3b80f6ca | 228 | printf ("gen_rtx_"); |
65963943 | 229 | print_code (code); |
3b80f6ca | 230 | printf (" (%smode", GET_MODE_NAME (GET_MODE (x))); |
65963943 RK |
231 | |
232 | fmt = GET_RTX_FORMAT (code); | |
233 | len = GET_RTX_LENGTH (code); | |
234 | for (i = 0; i < len; i++) | |
235 | { | |
236 | if (fmt[i] == '0') | |
237 | break; | |
a558d864 | 238 | printf (",\n\t"); |
65963943 RK |
239 | if (fmt[i] == 'e' || fmt[i] == 'u') |
240 | gen_exp (XEXP (x, i)); | |
241 | else if (fmt[i] == 'i') | |
3d678dca | 242 | printf ("%u", XINT (x, i)); |
65963943 RK |
243 | else if (fmt[i] == 's') |
244 | printf ("\"%s\"", XSTR (x, i)); | |
245 | else if (fmt[i] == 'E') | |
246 | { | |
247 | int j; | |
248 | printf ("gen_rtvec (%d", XVECLEN (x, i)); | |
249 | for (j = 0; j < XVECLEN (x, i); j++) | |
250 | { | |
251 | printf (",\n\t\t"); | |
252 | gen_exp (XVECEXP (x, i, j)); | |
253 | } | |
254 | printf (")"); | |
255 | } | |
256 | else | |
257 | abort (); | |
258 | } | |
259 | printf (")"); | |
260 | } | |
261 | \f | |
262 | /* Generate the `gen_...' function for a DEFINE_INSN. */ | |
263 | ||
264 | static void | |
265 | gen_insn (insn) | |
266 | rtx insn; | |
267 | { | |
268 | int operands; | |
269 | register int i; | |
270 | ||
271 | /* See if the pattern for this insn ends with a group of CLOBBERs of (hard) | |
272 | registers or MATCH_SCRATCHes. If so, store away the information for | |
0f41302f | 273 | later. */ |
65963943 RK |
274 | |
275 | if (XVEC (insn, 1)) | |
276 | { | |
277 | for (i = XVECLEN (insn, 1) - 1; i > 0; i--) | |
278 | if (GET_CODE (XVECEXP (insn, 1, i)) != CLOBBER | |
279 | || (GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != REG | |
280 | && GET_CODE (XEXP (XVECEXP (insn, 1, i), 0)) != MATCH_SCRATCH)) | |
281 | break; | |
282 | ||
283 | if (i != XVECLEN (insn, 1) - 1) | |
284 | { | |
e5f6a288 RK |
285 | register struct clobber_pat *p; |
286 | register struct clobber_ent *link | |
287 | = (struct clobber_ent *) xmalloc (sizeof (struct clobber_ent)); | |
288 | register int j; | |
289 | ||
290 | link->code_number = insn_code_number; | |
291 | ||
292 | /* See if any previous CLOBBER_LIST entry is the same as this | |
293 | one. */ | |
294 | ||
295 | for (p = clobber_list; p; p = p->next) | |
296 | { | |
297 | if (p->first_clobber != i + 1 | |
298 | || XVECLEN (p->pattern, 1) != XVECLEN (insn, 1)) | |
299 | continue; | |
300 | ||
301 | for (j = i + 1; j < XVECLEN (insn, 1); j++) | |
302 | { | |
303 | rtx old = XEXP (XVECEXP (p->pattern, 1, j), 0); | |
304 | rtx new = XEXP (XVECEXP (insn, 1, j), 0); | |
305 | ||
306 | /* OLD and NEW are the same if both are to be a SCRATCH | |
f5f178e0 | 307 | of the same mode, |
e5f6a288 | 308 | or if both are registers of the same mode and number. */ |
f5f178e0 RS |
309 | if (! (GET_MODE (old) == GET_MODE (new) |
310 | && ((GET_CODE (old) == MATCH_SCRATCH | |
311 | && GET_CODE (new) == MATCH_SCRATCH) | |
312 | || (GET_CODE (old) == REG && GET_CODE (new) == REG | |
313 | && REGNO (old) == REGNO (new))))) | |
e5f6a288 RK |
314 | break; |
315 | } | |
316 | ||
317 | if (j == XVECLEN (insn, 1)) | |
318 | break; | |
319 | } | |
320 | ||
321 | if (p == 0) | |
322 | { | |
323 | p = (struct clobber_pat *) xmalloc (sizeof (struct clobber_pat)); | |
65963943 | 324 | |
e5f6a288 RK |
325 | p->insns = 0; |
326 | p->pattern = insn; | |
327 | p->first_clobber = i + 1; | |
328 | p->next = clobber_list; | |
329 | clobber_list = p; | |
330 | } | |
331 | ||
332 | link->next = p->insns; | |
333 | p->insns = link; | |
65963943 RK |
334 | } |
335 | } | |
336 | ||
6b6ca844 RK |
337 | /* Don't mention instructions whose names are the null string |
338 | or begin with '*'. They are in the machine description just | |
339 | to be recognized. */ | |
340 | if (XSTR (insn, 0)[0] == 0 || XSTR (insn, 0)[0] == '*') | |
65963943 RK |
341 | return; |
342 | ||
343 | /* Find out how many operands this function has, | |
344 | and also whether any of them have register constraints. */ | |
345 | register_constraints = 0; | |
346 | operands = max_operand_vec (insn, 1); | |
347 | if (max_dup_opno >= operands) | |
348 | fatal ("match_dup operand number has no match_operand"); | |
349 | ||
350 | /* Output the function name and argument declarations. */ | |
351 | printf ("rtx\ngen_%s (", XSTR (insn, 0)); | |
352 | for (i = 0; i < operands; i++) | |
353 | printf (i ? ", operand%d" : "operand%d", i); | |
354 | printf (")\n"); | |
355 | for (i = 0; i < operands; i++) | |
356 | printf (" rtx operand%d;\n", i); | |
357 | printf ("{\n"); | |
358 | ||
359 | /* Output code to construct and return the rtl for the instruction body */ | |
360 | ||
361 | if (XVECLEN (insn, 1) == 1) | |
362 | { | |
363 | printf (" return "); | |
364 | gen_exp (XVECEXP (insn, 1, 0)); | |
365 | printf (";\n}\n\n"); | |
366 | } | |
367 | else | |
368 | { | |
3b80f6ca | 369 | printf (" return gen_rtx_PARALLEL (VOIDmode, gen_rtvec (%d", XVECLEN (insn, 1)); |
65963943 RK |
370 | for (i = 0; i < XVECLEN (insn, 1); i++) |
371 | { | |
372 | printf (",\n\t\t"); | |
373 | gen_exp (XVECEXP (insn, 1, i)); | |
374 | } | |
375 | printf ("));\n}\n\n"); | |
376 | } | |
377 | } | |
378 | \f | |
379 | /* Generate the `gen_...' function for a DEFINE_EXPAND. */ | |
380 | ||
381 | static void | |
382 | gen_expand (expand) | |
383 | rtx expand; | |
384 | { | |
385 | int operands; | |
386 | register int i; | |
387 | ||
388 | if (strlen (XSTR (expand, 0)) == 0) | |
389 | fatal ("define_expand lacks a name"); | |
390 | if (XVEC (expand, 1) == 0) | |
391 | fatal ("define_expand for %s lacks a pattern", XSTR (expand, 0)); | |
392 | ||
393 | /* Find out how many operands this function has, | |
394 | and also whether any of them have register constraints. */ | |
395 | register_constraints = 0; | |
396 | ||
397 | operands = max_operand_vec (expand, 1); | |
398 | ||
399 | /* Output the function name and argument declarations. */ | |
400 | printf ("rtx\ngen_%s (", XSTR (expand, 0)); | |
401 | for (i = 0; i < operands; i++) | |
402 | printf (i ? ", operand%d" : "operand%d", i); | |
403 | printf (")\n"); | |
404 | for (i = 0; i < operands; i++) | |
405 | printf (" rtx operand%d;\n", i); | |
406 | printf ("{\n"); | |
407 | ||
408 | /* If we don't have any C code to write, only one insn is being written, | |
409 | and no MATCH_DUPs are present, we can just return the desired insn | |
410 | like we do for a DEFINE_INSN. This saves memory. */ | |
411 | if ((XSTR (expand, 3) == 0 || *XSTR (expand, 3) == '\0') | |
412 | && operands > max_dup_opno | |
413 | && XVECLEN (expand, 1) == 1) | |
414 | { | |
415 | printf (" return "); | |
416 | gen_exp (XVECEXP (expand, 1, 0)); | |
417 | printf (";\n}\n\n"); | |
418 | return; | |
419 | } | |
420 | ||
421 | /* For each operand referred to only with MATCH_DUPs, | |
422 | make a local variable. */ | |
423 | for (i = operands; i <= max_dup_opno; i++) | |
424 | printf (" rtx operand%d;\n", i); | |
425 | if (operands > 0 || max_dup_opno >= 0) | |
426 | printf (" rtx operands[%d];\n", MAX (operands, max_dup_opno + 1)); | |
427 | printf (" rtx _val = 0;\n"); | |
428 | printf (" start_sequence ();\n"); | |
429 | ||
430 | /* The fourth operand of DEFINE_EXPAND is some code to be executed | |
431 | before the actual construction. | |
432 | This code expects to refer to `operands' | |
433 | just as the output-code in a DEFINE_INSN does, | |
434 | but here `operands' is an automatic array. | |
435 | So copy the operand values there before executing it. */ | |
436 | if (XSTR (expand, 3) && *XSTR (expand, 3)) | |
437 | { | |
438 | /* Output code to copy the arguments into `operands'. */ | |
439 | for (i = 0; i < operands; i++) | |
440 | printf (" operands[%d] = operand%d;\n", i, i); | |
441 | ||
442 | /* Output the special code to be executed before the sequence | |
443 | is generated. */ | |
444 | printf ("%s\n", XSTR (expand, 3)); | |
445 | ||
446 | /* Output code to copy the arguments back out of `operands' | |
447 | (unless we aren't going to use them at all). */ | |
448 | if (XVEC (expand, 1) != 0) | |
449 | { | |
450 | for (i = 0; i < operands; i++) | |
451 | printf (" operand%d = operands[%d];\n", i, i); | |
452 | for (; i <= max_dup_opno; i++) | |
453 | printf (" operand%d = operands[%d];\n", i, i); | |
454 | } | |
455 | } | |
456 | ||
457 | /* Output code to construct the rtl for the instruction bodies. | |
458 | Use emit_insn to add them to the sequence being accumulated. | |
459 | But don't do this if the user's code has set `no_more' nonzero. */ | |
460 | ||
461 | for (i = 0; i < XVECLEN (expand, 1); i++) | |
462 | { | |
463 | rtx next = XVECEXP (expand, 1, i); | |
464 | if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) | |
465 | || (GET_CODE (next) == PARALLEL | |
466 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
467 | && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) | |
468 | || GET_CODE (next) == RETURN) | |
469 | printf (" emit_jump_insn ("); | |
470 | else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) | |
471 | || GET_CODE (next) == CALL | |
472 | || (GET_CODE (next) == PARALLEL | |
473 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
474 | && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) | |
475 | || (GET_CODE (next) == PARALLEL | |
476 | && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) | |
477 | printf (" emit_call_insn ("); | |
478 | else if (GET_CODE (next) == CODE_LABEL) | |
479 | printf (" emit_label ("); | |
480 | else if (GET_CODE (next) == MATCH_OPERAND | |
481 | || GET_CODE (next) == MATCH_OPERATOR | |
482 | || GET_CODE (next) == MATCH_PARALLEL | |
483 | || GET_CODE (next) == MATCH_OP_DUP | |
484 | || GET_CODE (next) == MATCH_DUP | |
485 | || GET_CODE (next) == PARALLEL) | |
486 | printf (" emit ("); | |
487 | else | |
488 | printf (" emit_insn ("); | |
489 | gen_exp (next); | |
490 | printf (");\n"); | |
491 | if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC | |
492 | && GET_CODE (SET_SRC (next)) == LABEL_REF) | |
493 | printf (" emit_barrier ();"); | |
494 | } | |
495 | ||
496 | /* Call `gen_sequence' to make a SEQUENCE out of all the | |
497 | insns emitted within this gen_... function. */ | |
498 | ||
65963943 | 499 | printf (" _val = gen_sequence ();\n"); |
65963943 RK |
500 | printf (" end_sequence ();\n"); |
501 | printf (" return _val;\n}\n\n"); | |
502 | } | |
503 | ||
504 | /* Like gen_expand, but generates a SEQUENCE. */ | |
0f41302f | 505 | |
65963943 RK |
506 | static void |
507 | gen_split (split) | |
508 | rtx split; | |
509 | { | |
510 | register int i; | |
511 | int operands; | |
512 | ||
513 | if (XVEC (split, 0) == 0) | |
3462dc45 | 514 | fatal ("define_split (definition %d) lacks a pattern", insn_index_number); |
65963943 | 515 | else if (XVEC (split, 2) == 0) |
3462dc45 RK |
516 | fatal ("define_split (definition %d) lacks a replacement pattern", |
517 | insn_index_number); | |
65963943 RK |
518 | |
519 | /* Find out how many operands this function has. */ | |
520 | ||
521 | max_operand_vec (split, 2); | |
522 | operands = MAX (max_opno, max_dup_opno) + 1; | |
523 | ||
524 | /* Output the function name and argument declarations. */ | |
525 | printf ("rtx\ngen_split_%d (operands)\n rtx *operands;\n", | |
526 | insn_code_number); | |
527 | printf ("{\n"); | |
528 | ||
529 | /* Declare all local variables. */ | |
530 | for (i = 0; i < operands; i++) | |
531 | printf (" rtx operand%d;\n", i); | |
91afd8f5 | 532 | printf (" rtx _val = 0;\n"); |
65963943 RK |
533 | printf (" start_sequence ();\n"); |
534 | ||
535 | /* The fourth operand of DEFINE_SPLIT is some code to be executed | |
536 | before the actual construction. */ | |
537 | ||
538 | if (XSTR (split, 3)) | |
539 | printf ("%s\n", XSTR (split, 3)); | |
540 | ||
541 | /* Output code to copy the arguments back out of `operands' */ | |
542 | for (i = 0; i < operands; i++) | |
543 | printf (" operand%d = operands[%d];\n", i, i); | |
544 | ||
545 | /* Output code to construct the rtl for the instruction bodies. | |
546 | Use emit_insn to add them to the sequence being accumulated. | |
547 | But don't do this if the user's code has set `no_more' nonzero. */ | |
548 | ||
549 | for (i = 0; i < XVECLEN (split, 2); i++) | |
550 | { | |
551 | rtx next = XVECEXP (split, 2, i); | |
552 | if ((GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC) | |
553 | || (GET_CODE (next) == PARALLEL | |
554 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
555 | && GET_CODE (SET_DEST (XVECEXP (next, 0, 0))) == PC) | |
556 | || GET_CODE (next) == RETURN) | |
557 | printf (" emit_jump_insn ("); | |
558 | else if ((GET_CODE (next) == SET && GET_CODE (SET_SRC (next)) == CALL) | |
559 | || GET_CODE (next) == CALL | |
560 | || (GET_CODE (next) == PARALLEL | |
561 | && GET_CODE (XVECEXP (next, 0, 0)) == SET | |
562 | && GET_CODE (SET_SRC (XVECEXP (next, 0, 0))) == CALL) | |
563 | || (GET_CODE (next) == PARALLEL | |
564 | && GET_CODE (XVECEXP (next, 0, 0)) == CALL)) | |
565 | printf (" emit_call_insn ("); | |
566 | else if (GET_CODE (next) == CODE_LABEL) | |
567 | printf (" emit_label ("); | |
568 | else if (GET_CODE (next) == MATCH_OPERAND | |
569 | || GET_CODE (next) == MATCH_OPERATOR | |
570 | || GET_CODE (next) == MATCH_PARALLEL | |
571 | || GET_CODE (next) == MATCH_OP_DUP | |
572 | || GET_CODE (next) == MATCH_DUP | |
573 | || GET_CODE (next) == PARALLEL) | |
574 | printf (" emit ("); | |
575 | else | |
576 | printf (" emit_insn ("); | |
577 | gen_exp (next); | |
578 | printf (");\n"); | |
579 | if (GET_CODE (next) == SET && GET_CODE (SET_DEST (next)) == PC | |
580 | && GET_CODE (SET_SRC (next)) == LABEL_REF) | |
581 | printf (" emit_barrier ();"); | |
582 | } | |
583 | ||
584 | /* Call `gen_sequence' to make a SEQUENCE out of all the | |
585 | insns emitted within this gen_... function. */ | |
586 | ||
65963943 | 587 | printf (" _val = gen_sequence ();\n"); |
65963943 RK |
588 | printf (" end_sequence ();\n"); |
589 | printf (" return _val;\n}\n\n"); | |
590 | } | |
591 | \f | |
592 | /* Write a function, `add_clobbers', that is given a PARALLEL of sufficient | |
593 | size for the insn and an INSN_CODE, and inserts the required CLOBBERs at | |
594 | the end of the vector. */ | |
595 | ||
596 | static void | |
597 | output_add_clobbers () | |
598 | { | |
599 | struct clobber_pat *clobber; | |
e5f6a288 | 600 | struct clobber_ent *ent; |
65963943 RK |
601 | int i; |
602 | ||
603 | printf ("\n\nvoid\nadd_clobbers (pattern, insn_code_number)\n"); | |
604 | printf (" rtx pattern;\n int insn_code_number;\n"); | |
605 | printf ("{\n"); | |
606 | printf (" int i;\n\n"); | |
607 | printf (" switch (insn_code_number)\n"); | |
608 | printf (" {\n"); | |
609 | ||
610 | for (clobber = clobber_list; clobber; clobber = clobber->next) | |
611 | { | |
e5f6a288 RK |
612 | for (ent = clobber->insns; ent; ent = ent->next) |
613 | printf (" case %d:\n", ent->code_number); | |
65963943 RK |
614 | |
615 | for (i = clobber->first_clobber; i < XVECLEN (clobber->pattern, 1); i++) | |
616 | { | |
617 | printf (" XVECEXP (pattern, 0, %d) = ", i); | |
618 | gen_exp (XVECEXP (clobber->pattern, 1, i)); | |
619 | printf (";\n"); | |
620 | } | |
621 | ||
e5f6a288 | 622 | printf (" break;\n\n"); |
65963943 RK |
623 | } |
624 | ||
625 | printf (" default:\n"); | |
626 | printf (" abort ();\n"); | |
627 | printf (" }\n"); | |
628 | printf ("}\n"); | |
629 | } | |
630 | \f | |
631 | /* Write a function, init_mov_optab, that is called to set up entries | |
632 | in mov_optab for EXTRA_CC_MODES. */ | |
633 | ||
634 | static void | |
635 | output_init_mov_optab () | |
636 | { | |
637 | #ifdef EXTRA_CC_NAMES | |
638 | static char *cc_names[] = { EXTRA_CC_NAMES }; | |
639 | char *p; | |
85066503 | 640 | size_t i; |
65963943 RK |
641 | |
642 | printf ("\nvoid\ninit_mov_optab ()\n{\n"); | |
643 | ||
644 | for (i = 0; i < sizeof cc_names / sizeof cc_names[0]; i++) | |
645 | { | |
646 | printf ("#ifdef HAVE_mov"); | |
647 | for (p = cc_names[i]; *p; p++) | |
648 | printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p); | |
649 | printf ("\n"); | |
650 | printf (" if (HAVE_mov"); | |
651 | for (p = cc_names[i]; *p; p++) | |
652 | printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p); | |
653 | printf (")\n"); | |
654 | printf (" mov_optab->handlers[(int) %smode].insn_code = CODE_FOR_mov", | |
655 | cc_names[i]); | |
656 | for (p = cc_names[i]; *p; p++) | |
657 | printf ("%c", *p >= 'A' && *p <= 'Z' ? *p - 'A' + 'a' : *p); | |
658 | printf (";\n#endif\n"); | |
659 | } | |
660 | ||
661 | printf ("}\n"); | |
662 | #endif | |
663 | } | |
664 | \f | |
665 | char * | |
666 | xmalloc (size) | |
667 | unsigned size; | |
668 | { | |
669 | register char *val = (char *) malloc (size); | |
670 | ||
671 | if (val == 0) | |
672 | fatal ("virtual memory exhausted"); | |
673 | ||
674 | return val; | |
675 | } | |
676 | ||
677 | char * | |
678 | xrealloc (ptr, size) | |
679 | char *ptr; | |
680 | unsigned size; | |
681 | { | |
682 | char *result = (char *) realloc (ptr, size); | |
683 | if (!result) | |
684 | fatal ("virtual memory exhausted"); | |
685 | return result; | |
686 | } | |
687 | ||
688 | static void | |
689 | fatal (s, a1, a2) | |
690 | char *s; | |
691 | { | |
692 | fprintf (stderr, "genemit: "); | |
693 | fprintf (stderr, s, a1, a2); | |
694 | fprintf (stderr, "\n"); | |
695 | exit (FATAL_EXIT_CODE); | |
696 | } | |
697 | ||
698 | /* More 'friendly' abort that prints the line and file. | |
699 | config.h can #define abort fancy_abort if you like that sort of thing. */ | |
700 | ||
701 | void | |
702 | fancy_abort () | |
703 | { | |
704 | fatal ("Internal gcc abort."); | |
705 | } | |
706 | \f | |
707 | int | |
708 | main (argc, argv) | |
709 | int argc; | |
710 | char **argv; | |
711 | { | |
712 | rtx desc; | |
713 | FILE *infile; | |
65963943 RK |
714 | register int c; |
715 | ||
716 | obstack_init (rtl_obstack); | |
717 | ||
718 | if (argc <= 1) | |
719 | fatal ("No input file name."); | |
720 | ||
721 | infile = fopen (argv[1], "r"); | |
722 | if (infile == 0) | |
723 | { | |
724 | perror (argv[1]); | |
725 | exit (FATAL_EXIT_CODE); | |
726 | } | |
727 | ||
728 | init_rtl (); | |
729 | ||
730 | /* Assign sequential codes to all entries in the machine description | |
731 | in parallel with the tables in insn-output.c. */ | |
732 | ||
733 | insn_code_number = 0; | |
734 | insn_index_number = 0; | |
735 | ||
736 | printf ("/* Generated automatically by the program `genemit'\n\ | |
737 | from the machine description file `md'. */\n\n"); | |
738 | ||
739 | printf ("#include \"config.h\"\n"); | |
729da3f5 | 740 | printf ("#include \"system.h\"\n"); |
65963943 RK |
741 | printf ("#include \"rtl.h\"\n"); |
742 | printf ("#include \"expr.h\"\n"); | |
743 | printf ("#include \"real.h\"\n"); | |
1d300e19 | 744 | printf ("#include \"flags.h\"\n"); |
65963943 RK |
745 | printf ("#include \"output.h\"\n"); |
746 | printf ("#include \"insn-config.h\"\n\n"); | |
747 | printf ("#include \"insn-flags.h\"\n\n"); | |
748 | printf ("#include \"insn-codes.h\"\n\n"); | |
749 | printf ("extern char *insn_operand_constraint[][MAX_RECOG_OPERANDS];\n\n"); | |
750 | printf ("extern rtx recog_operand[];\n"); | |
751 | printf ("#define operands emit_operand\n\n"); | |
c0d45032 JL |
752 | printf ("#define FAIL do {end_sequence (); return _val;} while (0)\n"); |
753 | printf ("#define DONE do {_val = gen_sequence (); end_sequence (); return _val;} while (0)\n"); | |
65963943 RK |
754 | |
755 | /* Read the machine description. */ | |
756 | ||
757 | while (1) | |
758 | { | |
759 | c = read_skip_spaces (infile); | |
760 | if (c == EOF) | |
761 | break; | |
762 | ungetc (c, infile); | |
763 | ||
764 | desc = read_rtx (infile); | |
765 | if (GET_CODE (desc) == DEFINE_INSN) | |
766 | { | |
767 | gen_insn (desc); | |
768 | ++insn_code_number; | |
769 | } | |
770 | if (GET_CODE (desc) == DEFINE_EXPAND) | |
771 | { | |
772 | gen_expand (desc); | |
773 | ++insn_code_number; | |
774 | } | |
775 | if (GET_CODE (desc) == DEFINE_SPLIT) | |
776 | { | |
777 | gen_split (desc); | |
778 | ++insn_code_number; | |
779 | } | |
780 | if (GET_CODE (desc) == DEFINE_PEEPHOLE) | |
781 | { | |
782 | ++insn_code_number; | |
783 | } | |
784 | ++insn_index_number; | |
785 | } | |
786 | ||
787 | /* Write out the routine to add CLOBBERs to a pattern. */ | |
788 | output_add_clobbers (); | |
789 | ||
790 | /* Write the routine to initialize mov_optab for the EXTRA_CC_MODES. */ | |
791 | output_init_mov_optab (); | |
792 | ||
793 | fflush (stdout); | |
794 | exit (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); | |
795 | /* NOTREACHED */ | |
796 | return 0; | |
797 | } |