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385399a8 | 1 | /* Mapping from optabs to underlying library functions |
7adcbafe | 2 | Copyright (C) 1987-2022 Free Software Foundation, Inc. |
385399a8 RS |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | ||
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
24 | #include "target.h" | |
25 | #include "insn-codes.h" | |
26 | #include "optabs-libfuncs.h" | |
27 | #include "libfuncs.h" | |
28 | #include "optabs-query.h" | |
29 | #include "tree.h" | |
30 | #include "stringpool.h" | |
31 | #include "varasm.h" | |
32 | #include "stor-layout.h" | |
33 | #include "rtl.h" | |
34 | ||
35 | struct target_libfuncs default_target_libfuncs; | |
36 | #if SWITCHABLE_TARGET | |
37 | struct target_libfuncs *this_target_libfuncs = &default_target_libfuncs; | |
38 | #endif | |
39 | ||
40 | #define libfunc_hash \ | |
41 | (this_target_libfuncs->x_libfunc_hash) | |
42 | ||
43 | /* Prefixes for the current version of decimal floating point (BID vs. DPD) */ | |
44 | #if ENABLE_DECIMAL_BID_FORMAT | |
45 | #define DECIMAL_PREFIX "bid_" | |
46 | #else | |
47 | #define DECIMAL_PREFIX "dpd_" | |
48 | #endif | |
49 | ||
50 | /* Used for libfunc_hash. */ | |
51 | ||
52 | hashval_t | |
53 | libfunc_hasher::hash (libfunc_entry *e) | |
54 | { | |
55 | return ((e->mode1 + e->mode2 * NUM_MACHINE_MODES) ^ e->op); | |
56 | } | |
57 | ||
58 | /* Used for libfunc_hash. */ | |
59 | ||
60 | bool | |
61 | libfunc_hasher::equal (libfunc_entry *e1, libfunc_entry *e2) | |
62 | { | |
63 | return e1->op == e2->op && e1->mode1 == e2->mode1 && e1->mode2 == e2->mode2; | |
64 | } | |
65 | ||
66 | /* Return libfunc corresponding operation defined by OPTAB converting | |
67 | from MODE2 to MODE1. Trigger lazy initialization if needed, return NULL | |
68 | if no libfunc is available. */ | |
69 | rtx | |
70 | convert_optab_libfunc (convert_optab optab, machine_mode mode1, | |
71 | machine_mode mode2) | |
72 | { | |
73 | struct libfunc_entry e; | |
74 | struct libfunc_entry **slot; | |
75 | ||
76 | /* ??? This ought to be an assert, but not all of the places | |
77 | that we expand optabs know about the optabs that got moved | |
78 | to being direct. */ | |
79 | if (!(optab >= FIRST_CONV_OPTAB && optab <= LAST_CONVLIB_OPTAB)) | |
80 | return NULL_RTX; | |
81 | ||
82 | e.op = optab; | |
83 | e.mode1 = mode1; | |
84 | e.mode2 = mode2; | |
85 | slot = libfunc_hash->find_slot (&e, NO_INSERT); | |
86 | if (!slot) | |
87 | { | |
88 | const struct convert_optab_libcall_d *d | |
89 | = &convlib_def[optab - FIRST_CONV_OPTAB]; | |
90 | ||
91 | if (d->libcall_gen == NULL) | |
92 | return NULL; | |
93 | ||
94 | d->libcall_gen (optab, d->libcall_basename, mode1, mode2); | |
95 | slot = libfunc_hash->find_slot (&e, NO_INSERT); | |
96 | if (!slot) | |
97 | return NULL; | |
98 | } | |
99 | return (*slot)->libfunc; | |
100 | } | |
101 | ||
102 | /* Return libfunc corresponding operation defined by OPTAB in MODE. | |
103 | Trigger lazy initialization if needed, return NULL if no libfunc is | |
104 | available. */ | |
105 | rtx | |
106 | optab_libfunc (optab optab, machine_mode mode) | |
107 | { | |
108 | struct libfunc_entry e; | |
109 | struct libfunc_entry **slot; | |
110 | ||
111 | /* ??? This ought to be an assert, but not all of the places | |
112 | that we expand optabs know about the optabs that got moved | |
113 | to being direct. */ | |
114 | if (!(optab >= FIRST_NORM_OPTAB && optab <= LAST_NORMLIB_OPTAB)) | |
115 | return NULL_RTX; | |
116 | ||
117 | e.op = optab; | |
118 | e.mode1 = mode; | |
119 | e.mode2 = VOIDmode; | |
120 | slot = libfunc_hash->find_slot (&e, NO_INSERT); | |
121 | if (!slot) | |
122 | { | |
123 | const struct optab_libcall_d *d | |
124 | = &normlib_def[optab - FIRST_NORM_OPTAB]; | |
125 | ||
126 | if (d->libcall_gen == NULL) | |
127 | return NULL; | |
128 | ||
129 | d->libcall_gen (optab, d->libcall_basename, d->libcall_suffix, mode); | |
130 | slot = libfunc_hash->find_slot (&e, NO_INSERT); | |
131 | if (!slot) | |
132 | return NULL; | |
133 | } | |
134 | return (*slot)->libfunc; | |
135 | } | |
136 | ||
137 | /* Initialize the libfunc fields of an entire group of entries in some | |
138 | optab. Each entry is set equal to a string consisting of a leading | |
139 | pair of underscores followed by a generic operation name followed by | |
140 | a mode name (downshifted to lowercase) followed by a single character | |
141 | representing the number of operands for the given operation (which is | |
142 | usually one of the characters '2', '3', or '4'). | |
143 | ||
144 | OPTABLE is the table in which libfunc fields are to be initialized. | |
145 | OPNAME is the generic (string) name of the operation. | |
146 | SUFFIX is the character which specifies the number of operands for | |
147 | the given generic operation. | |
148 | MODE is the mode to generate for. */ | |
149 | ||
150 | static void | |
151 | gen_libfunc (optab optable, const char *opname, int suffix, | |
152 | machine_mode mode) | |
153 | { | |
154 | unsigned opname_len = strlen (opname); | |
155 | const char *mname = GET_MODE_NAME (mode); | |
156 | unsigned mname_len = strlen (mname); | |
157 | int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2; | |
158 | int len = prefix_len + opname_len + mname_len + 1 + 1; | |
159 | char *libfunc_name = XALLOCAVEC (char, len); | |
160 | char *p; | |
161 | const char *q; | |
162 | ||
163 | p = libfunc_name; | |
164 | *p++ = '_'; | |
165 | *p++ = '_'; | |
166 | if (targetm.libfunc_gnu_prefix) | |
167 | { | |
168 | *p++ = 'g'; | |
169 | *p++ = 'n'; | |
170 | *p++ = 'u'; | |
171 | *p++ = '_'; | |
172 | } | |
173 | for (q = opname; *q;) | |
174 | *p++ = *q++; | |
175 | for (q = mname; *q; q++) | |
176 | *p++ = TOLOWER (*q); | |
177 | *p++ = suffix; | |
178 | *p = '\0'; | |
179 | ||
180 | set_optab_libfunc (optable, mode, | |
181 | ggc_alloc_string (libfunc_name, p - libfunc_name)); | |
182 | } | |
183 | ||
184 | /* Like gen_libfunc, but verify that integer operation is involved. */ | |
185 | ||
186 | void | |
187 | gen_int_libfunc (optab optable, const char *opname, char suffix, | |
188 | machine_mode mode) | |
189 | { | |
190 | int maxsize = 2 * BITS_PER_WORD; | |
191 | int minsize = BITS_PER_WORD; | |
b4206259 | 192 | scalar_int_mode int_mode; |
385399a8 | 193 | |
b4206259 | 194 | if (!is_int_mode (mode, &int_mode)) |
385399a8 RS |
195 | return; |
196 | if (maxsize < LONG_LONG_TYPE_SIZE) | |
197 | maxsize = LONG_LONG_TYPE_SIZE; | |
198 | if (minsize > INT_TYPE_SIZE | |
199 | && (trapv_binoptab_p (optable) | |
200 | || trapv_unoptab_p (optable))) | |
201 | minsize = INT_TYPE_SIZE; | |
b4206259 RS |
202 | if (GET_MODE_BITSIZE (int_mode) < minsize |
203 | || GET_MODE_BITSIZE (int_mode) > maxsize) | |
385399a8 | 204 | return; |
b4206259 | 205 | gen_libfunc (optable, opname, suffix, int_mode); |
385399a8 RS |
206 | } |
207 | ||
208 | /* Like gen_libfunc, but verify that FP and set decimal prefix if needed. */ | |
209 | ||
210 | void | |
211 | gen_fp_libfunc (optab optable, const char *opname, char suffix, | |
212 | machine_mode mode) | |
213 | { | |
214 | char *dec_opname; | |
215 | ||
216 | if (GET_MODE_CLASS (mode) == MODE_FLOAT) | |
217 | gen_libfunc (optable, opname, suffix, mode); | |
218 | if (DECIMAL_FLOAT_MODE_P (mode)) | |
219 | { | |
220 | dec_opname = XALLOCAVEC (char, sizeof (DECIMAL_PREFIX) + strlen (opname)); | |
221 | /* For BID support, change the name to have either a bid_ or dpd_ prefix | |
222 | depending on the low level floating format used. */ | |
223 | memcpy (dec_opname, DECIMAL_PREFIX, sizeof (DECIMAL_PREFIX) - 1); | |
224 | strcpy (dec_opname + sizeof (DECIMAL_PREFIX) - 1, opname); | |
225 | gen_libfunc (optable, dec_opname, suffix, mode); | |
226 | } | |
227 | } | |
228 | ||
229 | /* Like gen_libfunc, but verify that fixed-point operation is involved. */ | |
230 | ||
231 | void | |
232 | gen_fixed_libfunc (optab optable, const char *opname, char suffix, | |
233 | machine_mode mode) | |
234 | { | |
235 | if (!ALL_FIXED_POINT_MODE_P (mode)) | |
236 | return; | |
237 | gen_libfunc (optable, opname, suffix, mode); | |
238 | } | |
239 | ||
240 | /* Like gen_libfunc, but verify that signed fixed-point operation is | |
241 | involved. */ | |
242 | ||
243 | void | |
244 | gen_signed_fixed_libfunc (optab optable, const char *opname, char suffix, | |
245 | machine_mode mode) | |
246 | { | |
247 | if (!SIGNED_FIXED_POINT_MODE_P (mode)) | |
248 | return; | |
249 | gen_libfunc (optable, opname, suffix, mode); | |
250 | } | |
251 | ||
252 | /* Like gen_libfunc, but verify that unsigned fixed-point operation is | |
253 | involved. */ | |
254 | ||
255 | void | |
256 | gen_unsigned_fixed_libfunc (optab optable, const char *opname, char suffix, | |
257 | machine_mode mode) | |
258 | { | |
259 | if (!UNSIGNED_FIXED_POINT_MODE_P (mode)) | |
260 | return; | |
261 | gen_libfunc (optable, opname, suffix, mode); | |
262 | } | |
263 | ||
264 | /* Like gen_libfunc, but verify that FP or INT operation is involved. */ | |
265 | ||
266 | void | |
267 | gen_int_fp_libfunc (optab optable, const char *name, char suffix, | |
268 | machine_mode mode) | |
269 | { | |
270 | if (DECIMAL_FLOAT_MODE_P (mode) || GET_MODE_CLASS (mode) == MODE_FLOAT) | |
271 | gen_fp_libfunc (optable, name, suffix, mode); | |
272 | if (INTEGRAL_MODE_P (mode)) | |
273 | gen_int_libfunc (optable, name, suffix, mode); | |
274 | } | |
275 | ||
276 | /* Like gen_libfunc, but verify that FP or INT operation is involved | |
277 | and add 'v' suffix for integer operation. */ | |
278 | ||
279 | void | |
280 | gen_intv_fp_libfunc (optab optable, const char *name, char suffix, | |
281 | machine_mode mode) | |
282 | { | |
283 | if (DECIMAL_FLOAT_MODE_P (mode) || GET_MODE_CLASS (mode) == MODE_FLOAT) | |
284 | gen_fp_libfunc (optable, name, suffix, mode); | |
285 | if (GET_MODE_CLASS (mode) == MODE_INT) | |
286 | { | |
287 | int len = strlen (name); | |
288 | char *v_name = XALLOCAVEC (char, len + 2); | |
289 | strcpy (v_name, name); | |
290 | v_name[len] = 'v'; | |
291 | v_name[len + 1] = 0; | |
292 | gen_int_libfunc (optable, v_name, suffix, mode); | |
293 | } | |
294 | } | |
295 | ||
296 | /* Like gen_libfunc, but verify that FP or INT or FIXED operation is | |
297 | involved. */ | |
298 | ||
299 | void | |
300 | gen_int_fp_fixed_libfunc (optab optable, const char *name, char suffix, | |
301 | machine_mode mode) | |
302 | { | |
303 | if (DECIMAL_FLOAT_MODE_P (mode) || GET_MODE_CLASS (mode) == MODE_FLOAT) | |
304 | gen_fp_libfunc (optable, name, suffix, mode); | |
305 | if (INTEGRAL_MODE_P (mode)) | |
306 | gen_int_libfunc (optable, name, suffix, mode); | |
307 | if (ALL_FIXED_POINT_MODE_P (mode)) | |
308 | gen_fixed_libfunc (optable, name, suffix, mode); | |
309 | } | |
310 | ||
311 | /* Like gen_libfunc, but verify that FP or INT or signed FIXED operation is | |
312 | involved. */ | |
313 | ||
314 | void | |
315 | gen_int_fp_signed_fixed_libfunc (optab optable, const char *name, char suffix, | |
316 | machine_mode mode) | |
317 | { | |
318 | if (DECIMAL_FLOAT_MODE_P (mode) || GET_MODE_CLASS (mode) == MODE_FLOAT) | |
319 | gen_fp_libfunc (optable, name, suffix, mode); | |
320 | if (INTEGRAL_MODE_P (mode)) | |
321 | gen_int_libfunc (optable, name, suffix, mode); | |
322 | if (SIGNED_FIXED_POINT_MODE_P (mode)) | |
323 | gen_signed_fixed_libfunc (optable, name, suffix, mode); | |
324 | } | |
325 | ||
326 | /* Like gen_libfunc, but verify that INT or FIXED operation is | |
327 | involved. */ | |
328 | ||
329 | void | |
330 | gen_int_fixed_libfunc (optab optable, const char *name, char suffix, | |
331 | machine_mode mode) | |
332 | { | |
333 | if (INTEGRAL_MODE_P (mode)) | |
334 | gen_int_libfunc (optable, name, suffix, mode); | |
335 | if (ALL_FIXED_POINT_MODE_P (mode)) | |
336 | gen_fixed_libfunc (optable, name, suffix, mode); | |
337 | } | |
338 | ||
339 | /* Like gen_libfunc, but verify that INT or signed FIXED operation is | |
340 | involved. */ | |
341 | ||
342 | void | |
343 | gen_int_signed_fixed_libfunc (optab optable, const char *name, char suffix, | |
344 | machine_mode mode) | |
345 | { | |
346 | if (INTEGRAL_MODE_P (mode)) | |
347 | gen_int_libfunc (optable, name, suffix, mode); | |
348 | if (SIGNED_FIXED_POINT_MODE_P (mode)) | |
349 | gen_signed_fixed_libfunc (optable, name, suffix, mode); | |
350 | } | |
351 | ||
352 | /* Like gen_libfunc, but verify that INT or unsigned FIXED operation is | |
353 | involved. */ | |
354 | ||
355 | void | |
356 | gen_int_unsigned_fixed_libfunc (optab optable, const char *name, char suffix, | |
357 | machine_mode mode) | |
358 | { | |
359 | if (INTEGRAL_MODE_P (mode)) | |
360 | gen_int_libfunc (optable, name, suffix, mode); | |
361 | if (UNSIGNED_FIXED_POINT_MODE_P (mode)) | |
362 | gen_unsigned_fixed_libfunc (optable, name, suffix, mode); | |
363 | } | |
364 | ||
365 | /* Initialize the libfunc fields of an entire group of entries of an | |
366 | inter-mode-class conversion optab. The string formation rules are | |
367 | similar to the ones for init_libfuncs, above, but instead of having | |
368 | a mode name and an operand count these functions have two mode names | |
369 | and no operand count. */ | |
370 | ||
371 | void | |
372 | gen_interclass_conv_libfunc (convert_optab tab, | |
373 | const char *opname, | |
374 | machine_mode tmode, | |
375 | machine_mode fmode) | |
376 | { | |
377 | size_t opname_len = strlen (opname); | |
378 | size_t mname_len = 0; | |
379 | ||
380 | const char *fname, *tname; | |
381 | const char *q; | |
382 | int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2; | |
383 | char *libfunc_name, *suffix; | |
384 | char *nondec_name, *dec_name, *nondec_suffix, *dec_suffix; | |
385 | char *p; | |
386 | ||
387 | /* If this is a decimal conversion, add the current BID vs. DPD prefix that | |
388 | depends on which underlying decimal floating point format is used. */ | |
389 | const size_t dec_len = sizeof (DECIMAL_PREFIX) - 1; | |
390 | ||
391 | mname_len = strlen (GET_MODE_NAME (tmode)) + strlen (GET_MODE_NAME (fmode)); | |
392 | ||
393 | nondec_name = XALLOCAVEC (char, prefix_len + opname_len + mname_len + 1 + 1); | |
394 | nondec_name[0] = '_'; | |
395 | nondec_name[1] = '_'; | |
396 | if (targetm.libfunc_gnu_prefix) | |
397 | { | |
398 | nondec_name[2] = 'g'; | |
399 | nondec_name[3] = 'n'; | |
400 | nondec_name[4] = 'u'; | |
401 | nondec_name[5] = '_'; | |
402 | } | |
403 | ||
404 | memcpy (&nondec_name[prefix_len], opname, opname_len); | |
405 | nondec_suffix = nondec_name + opname_len + prefix_len; | |
406 | ||
407 | dec_name = XALLOCAVEC (char, 2 + dec_len + opname_len + mname_len + 1 + 1); | |
408 | dec_name[0] = '_'; | |
409 | dec_name[1] = '_'; | |
410 | memcpy (&dec_name[2], DECIMAL_PREFIX, dec_len); | |
411 | memcpy (&dec_name[2+dec_len], opname, opname_len); | |
412 | dec_suffix = dec_name + dec_len + opname_len + 2; | |
413 | ||
414 | fname = GET_MODE_NAME (fmode); | |
415 | tname = GET_MODE_NAME (tmode); | |
416 | ||
417 | if (DECIMAL_FLOAT_MODE_P (fmode) || DECIMAL_FLOAT_MODE_P (tmode)) | |
418 | { | |
419 | libfunc_name = dec_name; | |
420 | suffix = dec_suffix; | |
421 | } | |
422 | else | |
423 | { | |
424 | libfunc_name = nondec_name; | |
425 | suffix = nondec_suffix; | |
426 | } | |
427 | ||
428 | p = suffix; | |
429 | for (q = fname; *q; p++, q++) | |
430 | *p = TOLOWER (*q); | |
431 | for (q = tname; *q; p++, q++) | |
432 | *p = TOLOWER (*q); | |
433 | ||
434 | *p = '\0'; | |
435 | ||
436 | set_conv_libfunc (tab, tmode, fmode, | |
437 | ggc_alloc_string (libfunc_name, p - libfunc_name)); | |
438 | } | |
439 | ||
440 | /* Same as gen_interclass_conv_libfunc but verify that we are producing | |
441 | int->fp conversion. */ | |
442 | ||
443 | void | |
444 | gen_int_to_fp_conv_libfunc (convert_optab tab, | |
445 | const char *opname, | |
446 | machine_mode tmode, | |
447 | machine_mode fmode) | |
448 | { | |
449 | if (GET_MODE_CLASS (fmode) != MODE_INT) | |
450 | return; | |
451 | if (GET_MODE_CLASS (tmode) != MODE_FLOAT && !DECIMAL_FLOAT_MODE_P (tmode)) | |
452 | return; | |
453 | gen_interclass_conv_libfunc (tab, opname, tmode, fmode); | |
454 | } | |
455 | ||
456 | /* ufloat_optab is special by using floatun for FP and floatuns decimal fp | |
457 | naming scheme. */ | |
458 | ||
459 | void | |
460 | gen_ufloat_conv_libfunc (convert_optab tab, | |
461 | const char *opname ATTRIBUTE_UNUSED, | |
462 | machine_mode tmode, | |
463 | machine_mode fmode) | |
464 | { | |
465 | if (DECIMAL_FLOAT_MODE_P (tmode)) | |
466 | gen_int_to_fp_conv_libfunc (tab, "floatuns", tmode, fmode); | |
467 | else | |
468 | gen_int_to_fp_conv_libfunc (tab, "floatun", tmode, fmode); | |
469 | } | |
470 | ||
471 | /* Same as gen_interclass_conv_libfunc but verify that we are producing | |
472 | fp->int conversion. */ | |
473 | ||
474 | void | |
475 | gen_int_to_fp_nondecimal_conv_libfunc (convert_optab tab, | |
476 | const char *opname, | |
477 | machine_mode tmode, | |
478 | machine_mode fmode) | |
479 | { | |
480 | if (GET_MODE_CLASS (fmode) != MODE_INT) | |
481 | return; | |
482 | if (GET_MODE_CLASS (tmode) != MODE_FLOAT) | |
483 | return; | |
484 | gen_interclass_conv_libfunc (tab, opname, tmode, fmode); | |
485 | } | |
486 | ||
487 | /* Same as gen_interclass_conv_libfunc but verify that we are producing | |
488 | fp->int conversion with no decimal floating point involved. */ | |
489 | ||
490 | void | |
491 | gen_fp_to_int_conv_libfunc (convert_optab tab, | |
492 | const char *opname, | |
493 | machine_mode tmode, | |
494 | machine_mode fmode) | |
495 | { | |
496 | if (GET_MODE_CLASS (fmode) != MODE_FLOAT && !DECIMAL_FLOAT_MODE_P (fmode)) | |
497 | return; | |
498 | if (GET_MODE_CLASS (tmode) != MODE_INT) | |
499 | return; | |
500 | gen_interclass_conv_libfunc (tab, opname, tmode, fmode); | |
501 | } | |
502 | ||
503 | /* Initialize the libfunc fields of an of an intra-mode-class conversion optab. | |
504 | The string formation rules are | |
505 | similar to the ones for init_libfunc, above. */ | |
506 | ||
507 | void | |
508 | gen_intraclass_conv_libfunc (convert_optab tab, const char *opname, | |
509 | machine_mode tmode, machine_mode fmode) | |
510 | { | |
511 | size_t opname_len = strlen (opname); | |
512 | size_t mname_len = 0; | |
513 | ||
514 | const char *fname, *tname; | |
515 | const char *q; | |
516 | int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2; | |
517 | char *nondec_name, *dec_name, *nondec_suffix, *dec_suffix; | |
518 | char *libfunc_name, *suffix; | |
519 | char *p; | |
520 | ||
521 | /* If this is a decimal conversion, add the current BID vs. DPD prefix that | |
522 | depends on which underlying decimal floating point format is used. */ | |
523 | const size_t dec_len = sizeof (DECIMAL_PREFIX) - 1; | |
524 | ||
525 | mname_len = strlen (GET_MODE_NAME (tmode)) + strlen (GET_MODE_NAME (fmode)); | |
526 | ||
527 | nondec_name = XALLOCAVEC (char, 2 + opname_len + mname_len + 1 + 1); | |
528 | nondec_name[0] = '_'; | |
529 | nondec_name[1] = '_'; | |
530 | if (targetm.libfunc_gnu_prefix) | |
531 | { | |
532 | nondec_name[2] = 'g'; | |
533 | nondec_name[3] = 'n'; | |
534 | nondec_name[4] = 'u'; | |
535 | nondec_name[5] = '_'; | |
536 | } | |
537 | memcpy (&nondec_name[prefix_len], opname, opname_len); | |
538 | nondec_suffix = nondec_name + opname_len + prefix_len; | |
539 | ||
540 | dec_name = XALLOCAVEC (char, 2 + dec_len + opname_len + mname_len + 1 + 1); | |
541 | dec_name[0] = '_'; | |
542 | dec_name[1] = '_'; | |
543 | memcpy (&dec_name[2], DECIMAL_PREFIX, dec_len); | |
544 | memcpy (&dec_name[2 + dec_len], opname, opname_len); | |
545 | dec_suffix = dec_name + dec_len + opname_len + 2; | |
546 | ||
547 | fname = GET_MODE_NAME (fmode); | |
548 | tname = GET_MODE_NAME (tmode); | |
549 | ||
550 | if (DECIMAL_FLOAT_MODE_P (fmode) || DECIMAL_FLOAT_MODE_P (tmode)) | |
551 | { | |
552 | libfunc_name = dec_name; | |
553 | suffix = dec_suffix; | |
554 | } | |
555 | else | |
556 | { | |
557 | libfunc_name = nondec_name; | |
558 | suffix = nondec_suffix; | |
559 | } | |
560 | ||
561 | p = suffix; | |
562 | for (q = fname; *q; p++, q++) | |
563 | *p = TOLOWER (*q); | |
564 | for (q = tname; *q; p++, q++) | |
565 | *p = TOLOWER (*q); | |
566 | ||
567 | *p++ = '2'; | |
568 | *p = '\0'; | |
569 | ||
570 | set_conv_libfunc (tab, tmode, fmode, | |
571 | ggc_alloc_string (libfunc_name, p - libfunc_name)); | |
572 | } | |
573 | ||
574 | /* Pick proper libcall for trunc_optab. We need to chose if we do | |
575 | truncation or extension and interclass or intraclass. */ | |
576 | ||
577 | void | |
578 | gen_trunc_conv_libfunc (convert_optab tab, | |
579 | const char *opname, | |
580 | machine_mode tmode, | |
581 | machine_mode fmode) | |
582 | { | |
3205ab28 RS |
583 | scalar_float_mode float_tmode, float_fmode; |
584 | if (!is_a <scalar_float_mode> (fmode, &float_fmode) | |
585 | || !is_a <scalar_float_mode> (tmode, &float_tmode) | |
586 | || float_tmode == float_fmode) | |
385399a8 RS |
587 | return; |
588 | ||
3205ab28 RS |
589 | if (GET_MODE_CLASS (float_tmode) != GET_MODE_CLASS (float_fmode)) |
590 | gen_interclass_conv_libfunc (tab, opname, float_tmode, float_fmode); | |
385399a8 | 591 | |
3205ab28 | 592 | if (GET_MODE_PRECISION (float_fmode) <= GET_MODE_PRECISION (float_tmode)) |
385399a8 RS |
593 | return; |
594 | ||
3205ab28 RS |
595 | if (GET_MODE_CLASS (float_tmode) == GET_MODE_CLASS (float_fmode)) |
596 | gen_intraclass_conv_libfunc (tab, opname, float_tmode, float_fmode); | |
385399a8 RS |
597 | } |
598 | ||
599 | /* Pick proper libcall for extend_optab. We need to chose if we do | |
600 | truncation or extension and interclass or intraclass. */ | |
601 | ||
602 | void | |
603 | gen_extend_conv_libfunc (convert_optab tab, | |
604 | const char *opname ATTRIBUTE_UNUSED, | |
605 | machine_mode tmode, | |
606 | machine_mode fmode) | |
607 | { | |
3205ab28 RS |
608 | scalar_float_mode float_tmode, float_fmode; |
609 | if (!is_a <scalar_float_mode> (fmode, &float_fmode) | |
610 | || !is_a <scalar_float_mode> (tmode, &float_tmode) | |
611 | || float_tmode == float_fmode) | |
385399a8 RS |
612 | return; |
613 | ||
3205ab28 RS |
614 | if (GET_MODE_CLASS (float_tmode) != GET_MODE_CLASS (float_fmode)) |
615 | gen_interclass_conv_libfunc (tab, opname, float_tmode, float_fmode); | |
385399a8 | 616 | |
3205ab28 | 617 | if (GET_MODE_PRECISION (float_fmode) > GET_MODE_PRECISION (float_tmode)) |
385399a8 RS |
618 | return; |
619 | ||
3205ab28 | 620 | if (GET_MODE_CLASS (float_tmode) == GET_MODE_CLASS (float_fmode)) |
385399a8 RS |
621 | gen_intraclass_conv_libfunc (tab, opname, tmode, fmode); |
622 | } | |
623 | ||
624 | /* Pick proper libcall for fract_optab. We need to chose if we do | |
625 | interclass or intraclass. */ | |
626 | ||
627 | void | |
628 | gen_fract_conv_libfunc (convert_optab tab, | |
629 | const char *opname, | |
630 | machine_mode tmode, | |
631 | machine_mode fmode) | |
632 | { | |
633 | if (tmode == fmode) | |
634 | return; | |
635 | if (!(ALL_FIXED_POINT_MODE_P (tmode) || ALL_FIXED_POINT_MODE_P (fmode))) | |
636 | return; | |
637 | ||
638 | if (GET_MODE_CLASS (tmode) == GET_MODE_CLASS (fmode)) | |
639 | gen_intraclass_conv_libfunc (tab, opname, tmode, fmode); | |
640 | else | |
641 | gen_interclass_conv_libfunc (tab, opname, tmode, fmode); | |
642 | } | |
643 | ||
644 | /* Pick proper libcall for fractuns_optab. */ | |
645 | ||
646 | void | |
647 | gen_fractuns_conv_libfunc (convert_optab tab, | |
648 | const char *opname, | |
649 | machine_mode tmode, | |
650 | machine_mode fmode) | |
651 | { | |
652 | if (tmode == fmode) | |
653 | return; | |
654 | /* One mode must be a fixed-point mode, and the other must be an integer | |
655 | mode. */ | |
656 | if (!((ALL_FIXED_POINT_MODE_P (tmode) && GET_MODE_CLASS (fmode) == MODE_INT) | |
657 | || (ALL_FIXED_POINT_MODE_P (fmode) | |
658 | && GET_MODE_CLASS (tmode) == MODE_INT))) | |
659 | return; | |
660 | ||
661 | gen_interclass_conv_libfunc (tab, opname, tmode, fmode); | |
662 | } | |
663 | ||
664 | /* Pick proper libcall for satfract_optab. We need to chose if we do | |
665 | interclass or intraclass. */ | |
666 | ||
667 | void | |
668 | gen_satfract_conv_libfunc (convert_optab tab, | |
669 | const char *opname, | |
670 | machine_mode tmode, | |
671 | machine_mode fmode) | |
672 | { | |
673 | if (tmode == fmode) | |
674 | return; | |
675 | /* TMODE must be a fixed-point mode. */ | |
676 | if (!ALL_FIXED_POINT_MODE_P (tmode)) | |
677 | return; | |
678 | ||
679 | if (GET_MODE_CLASS (tmode) == GET_MODE_CLASS (fmode)) | |
680 | gen_intraclass_conv_libfunc (tab, opname, tmode, fmode); | |
681 | else | |
682 | gen_interclass_conv_libfunc (tab, opname, tmode, fmode); | |
683 | } | |
684 | ||
685 | /* Pick proper libcall for satfractuns_optab. */ | |
686 | ||
687 | void | |
688 | gen_satfractuns_conv_libfunc (convert_optab tab, | |
689 | const char *opname, | |
690 | machine_mode tmode, | |
691 | machine_mode fmode) | |
692 | { | |
693 | if (tmode == fmode) | |
694 | return; | |
695 | /* TMODE must be a fixed-point mode, and FMODE must be an integer mode. */ | |
696 | if (!(ALL_FIXED_POINT_MODE_P (tmode) && GET_MODE_CLASS (fmode) == MODE_INT)) | |
697 | return; | |
698 | ||
699 | gen_interclass_conv_libfunc (tab, opname, tmode, fmode); | |
700 | } | |
701 | ||
702 | /* Hashtable callbacks for libfunc_decls. */ | |
703 | ||
704 | struct libfunc_decl_hasher : ggc_ptr_hash<tree_node> | |
705 | { | |
706 | static hashval_t | |
707 | hash (tree entry) | |
708 | { | |
709 | return IDENTIFIER_HASH_VALUE (DECL_NAME (entry)); | |
710 | } | |
711 | ||
712 | static bool | |
713 | equal (tree decl, tree name) | |
714 | { | |
715 | return DECL_NAME (decl) == name; | |
716 | } | |
717 | }; | |
718 | ||
719 | /* A table of previously-created libfuncs, hashed by name. */ | |
720 | static GTY (()) hash_table<libfunc_decl_hasher> *libfunc_decls; | |
721 | ||
a3ace685 | 722 | /* Build a decl for a libfunc named NAME with visibility VIS. */ |
385399a8 RS |
723 | |
724 | tree | |
a3ace685 | 725 | build_libfunc_function_visibility (const char *name, symbol_visibility vis) |
385399a8 | 726 | { |
ee516de9 | 727 | /* ??? We don't have any type information; pretend this is "int foo ()". */ |
385399a8 RS |
728 | tree decl = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL, |
729 | get_identifier (name), | |
730 | build_function_type (integer_type_node, NULL_TREE)); | |
385399a8 RS |
731 | DECL_EXTERNAL (decl) = 1; |
732 | TREE_PUBLIC (decl) = 1; | |
ee516de9 | 733 | DECL_ARTIFICIAL (decl) = 1; |
a3ace685 | 734 | DECL_VISIBILITY (decl) = vis; |
ee516de9 | 735 | DECL_VISIBILITY_SPECIFIED (decl) = 1; |
385399a8 RS |
736 | gcc_assert (DECL_ASSEMBLER_NAME (decl)); |
737 | ||
385399a8 RS |
738 | return decl; |
739 | } | |
740 | ||
a3ace685 RH |
741 | /* Build a decl for a libfunc named NAME. */ |
742 | ||
743 | tree | |
744 | build_libfunc_function (const char *name) | |
745 | { | |
746 | return build_libfunc_function_visibility (name, VISIBILITY_DEFAULT); | |
747 | } | |
748 | ||
385399a8 | 749 | /* Return a libfunc for NAME, creating one if we don't already have one. |
a3ace685 | 750 | The decl is given visibility VIS. The returned rtx is a SYMBOL_REF. */ |
385399a8 RS |
751 | |
752 | rtx | |
a3ace685 | 753 | init_one_libfunc_visibility (const char *name, symbol_visibility vis) |
385399a8 RS |
754 | { |
755 | tree id, decl; | |
756 | hashval_t hash; | |
757 | ||
758 | if (libfunc_decls == NULL) | |
759 | libfunc_decls = hash_table<libfunc_decl_hasher>::create_ggc (37); | |
760 | ||
761 | /* See if we have already created a libfunc decl for this function. */ | |
762 | id = get_identifier (name); | |
763 | hash = IDENTIFIER_HASH_VALUE (id); | |
764 | tree *slot = libfunc_decls->find_slot_with_hash (id, hash, INSERT); | |
765 | decl = *slot; | |
766 | if (decl == NULL) | |
767 | { | |
768 | /* Create a new decl, so that it can be passed to | |
769 | targetm.encode_section_info. */ | |
a3ace685 | 770 | decl = build_libfunc_function_visibility (name, vis); |
385399a8 RS |
771 | *slot = decl; |
772 | } | |
773 | return XEXP (DECL_RTL (decl), 0); | |
774 | } | |
775 | ||
a3ace685 RH |
776 | rtx |
777 | init_one_libfunc (const char *name) | |
778 | { | |
779 | return init_one_libfunc_visibility (name, VISIBILITY_DEFAULT); | |
780 | } | |
781 | ||
385399a8 RS |
782 | /* Adjust the assembler name of libfunc NAME to ASMSPEC. */ |
783 | ||
784 | rtx | |
785 | set_user_assembler_libfunc (const char *name, const char *asmspec) | |
786 | { | |
787 | tree id, decl; | |
788 | hashval_t hash; | |
789 | ||
790 | id = get_identifier (name); | |
791 | hash = IDENTIFIER_HASH_VALUE (id); | |
792 | tree *slot = libfunc_decls->find_slot_with_hash (id, hash, NO_INSERT); | |
793 | gcc_assert (slot); | |
794 | decl = (tree) *slot; | |
795 | set_user_assembler_name (decl, asmspec); | |
796 | return XEXP (DECL_RTL (decl), 0); | |
797 | } | |
798 | ||
799 | /* Call this to reset the function entry for one optab (OPTABLE) in mode | |
800 | MODE to NAME, which should be either 0 or a string constant. */ | |
801 | ||
802 | void | |
803 | set_optab_libfunc (optab op, machine_mode mode, const char *name) | |
804 | { | |
805 | rtx val; | |
806 | struct libfunc_entry e; | |
807 | struct libfunc_entry **slot; | |
808 | ||
809 | e.op = op; | |
810 | e.mode1 = mode; | |
811 | e.mode2 = VOIDmode; | |
812 | ||
813 | if (name) | |
814 | val = init_one_libfunc (name); | |
815 | else | |
816 | val = 0; | |
817 | slot = libfunc_hash->find_slot (&e, INSERT); | |
818 | if (*slot == NULL) | |
819 | *slot = ggc_alloc<libfunc_entry> (); | |
820 | (*slot)->op = op; | |
821 | (*slot)->mode1 = mode; | |
822 | (*slot)->mode2 = VOIDmode; | |
823 | (*slot)->libfunc = val; | |
824 | } | |
825 | ||
826 | /* Call this to reset the function entry for one conversion optab | |
827 | (OPTABLE) from mode FMODE to mode TMODE to NAME, which should be | |
828 | either 0 or a string constant. */ | |
829 | ||
830 | void | |
831 | set_conv_libfunc (convert_optab optab, machine_mode tmode, | |
832 | machine_mode fmode, const char *name) | |
833 | { | |
834 | rtx val; | |
835 | struct libfunc_entry e; | |
836 | struct libfunc_entry **slot; | |
837 | ||
838 | e.op = optab; | |
839 | e.mode1 = tmode; | |
840 | e.mode2 = fmode; | |
841 | ||
842 | if (name) | |
843 | val = init_one_libfunc (name); | |
844 | else | |
845 | val = 0; | |
846 | slot = libfunc_hash->find_slot (&e, INSERT); | |
847 | if (*slot == NULL) | |
848 | *slot = ggc_alloc<libfunc_entry> (); | |
849 | (*slot)->op = optab; | |
850 | (*slot)->mode1 = tmode; | |
851 | (*slot)->mode2 = fmode; | |
852 | (*slot)->libfunc = val; | |
853 | } | |
854 | ||
855 | /* Call this to initialize the contents of the optabs | |
856 | appropriately for the current target machine. */ | |
857 | ||
858 | void | |
859 | init_optabs (void) | |
860 | { | |
861 | if (libfunc_hash) | |
862 | libfunc_hash->empty (); | |
863 | else | |
864 | libfunc_hash = hash_table<libfunc_hasher>::create_ggc (10); | |
865 | ||
866 | /* Fill in the optabs with the insns we support. */ | |
867 | init_all_optabs (this_fn_optabs); | |
868 | ||
869 | /* The ffs function operates on `int'. Fall back on it if we do not | |
870 | have a libgcc2 function for that width. */ | |
871 | if (INT_TYPE_SIZE < BITS_PER_WORD) | |
fffbab82 RS |
872 | { |
873 | scalar_int_mode mode = int_mode_for_size (INT_TYPE_SIZE, 0).require (); | |
874 | set_optab_libfunc (ffs_optab, mode, "ffs"); | |
875 | } | |
385399a8 RS |
876 | |
877 | /* Explicitly initialize the bswap libfuncs since we need them to be | |
878 | valid for things other than word_mode. */ | |
879 | if (targetm.libfunc_gnu_prefix) | |
880 | { | |
881 | set_optab_libfunc (bswap_optab, SImode, "__gnu_bswapsi2"); | |
882 | set_optab_libfunc (bswap_optab, DImode, "__gnu_bswapdi2"); | |
883 | } | |
884 | else | |
885 | { | |
886 | set_optab_libfunc (bswap_optab, SImode, "__bswapsi2"); | |
887 | set_optab_libfunc (bswap_optab, DImode, "__bswapdi2"); | |
888 | } | |
889 | ||
890 | /* Use cabs for double complex abs, since systems generally have cabs. | |
891 | Don't define any libcall for float complex, so that cabs will be used. */ | |
892 | if (complex_double_type_node) | |
893 | set_optab_libfunc (abs_optab, TYPE_MODE (complex_double_type_node), | |
894 | "cabs"); | |
895 | ||
385399a8 RS |
896 | unwind_sjlj_register_libfunc = init_one_libfunc ("_Unwind_SjLj_Register"); |
897 | unwind_sjlj_unregister_libfunc | |
898 | = init_one_libfunc ("_Unwind_SjLj_Unregister"); | |
899 | ||
385399a8 RS |
900 | /* Allow the target to add more libcalls or rename some, etc. */ |
901 | targetm.init_libfuncs (); | |
902 | } | |
903 | ||
904 | /* A helper function for init_sync_libfuncs. Using the basename BASE, | |
905 | install libfuncs into TAB for BASE_N for 1 <= N <= MAX. */ | |
906 | ||
907 | static void | |
908 | init_sync_libfuncs_1 (optab tab, const char *base, int max) | |
909 | { | |
910 | machine_mode mode; | |
911 | char buf[64]; | |
912 | size_t len = strlen (base); | |
913 | int i; | |
914 | ||
915 | gcc_assert (max <= 8); | |
916 | gcc_assert (len + 3 < sizeof (buf)); | |
917 | ||
918 | memcpy (buf, base, len); | |
919 | buf[len] = '_'; | |
920 | buf[len + 1] = '0'; | |
921 | buf[len + 2] = '\0'; | |
922 | ||
923 | mode = QImode; | |
924 | for (i = 1; i <= max; i *= 2) | |
925 | { | |
490d0f6c RS |
926 | if (i > 1) |
927 | mode = GET_MODE_2XWIDER_MODE (mode).require (); | |
385399a8 RS |
928 | buf[len + 1] = '0' + i; |
929 | set_optab_libfunc (tab, mode, buf); | |
385399a8 RS |
930 | } |
931 | } | |
932 | ||
933 | void | |
934 | init_sync_libfuncs (int max) | |
935 | { | |
936 | if (!flag_sync_libcalls) | |
937 | return; | |
938 | ||
939 | init_sync_libfuncs_1 (sync_compare_and_swap_optab, | |
940 | "__sync_val_compare_and_swap", max); | |
941 | init_sync_libfuncs_1 (sync_lock_test_and_set_optab, | |
942 | "__sync_lock_test_and_set", max); | |
943 | ||
944 | init_sync_libfuncs_1 (sync_old_add_optab, "__sync_fetch_and_add", max); | |
945 | init_sync_libfuncs_1 (sync_old_sub_optab, "__sync_fetch_and_sub", max); | |
946 | init_sync_libfuncs_1 (sync_old_ior_optab, "__sync_fetch_and_or", max); | |
947 | init_sync_libfuncs_1 (sync_old_and_optab, "__sync_fetch_and_and", max); | |
948 | init_sync_libfuncs_1 (sync_old_xor_optab, "__sync_fetch_and_xor", max); | |
949 | init_sync_libfuncs_1 (sync_old_nand_optab, "__sync_fetch_and_nand", max); | |
950 | ||
951 | init_sync_libfuncs_1 (sync_new_add_optab, "__sync_add_and_fetch", max); | |
952 | init_sync_libfuncs_1 (sync_new_sub_optab, "__sync_sub_and_fetch", max); | |
953 | init_sync_libfuncs_1 (sync_new_ior_optab, "__sync_or_and_fetch", max); | |
954 | init_sync_libfuncs_1 (sync_new_and_optab, "__sync_and_and_fetch", max); | |
955 | init_sync_libfuncs_1 (sync_new_xor_optab, "__sync_xor_and_fetch", max); | |
956 | init_sync_libfuncs_1 (sync_new_nand_optab, "__sync_nand_and_fetch", max); | |
957 | } | |
958 | ||
959 | #include "gt-optabs-libfuncs.h" |