1 | /* Mapping from optabs to underlying library functions |
2 | Copyright (C) 1987-2024 Free Software Foundation, Inc. |
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 (value: &e, insert: 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 (value: &e, insert: 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 (value: &e, insert: 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 (value: &e, insert: 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 (s: opname); |
155 | const char *mname = GET_MODE_NAME (mode); |
156 | unsigned mname_len = strlen (s: 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 (contents: libfunc_name, length: 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; |
192 | scalar_int_mode int_mode; |
193 | |
194 | if (!is_int_mode (mode, int_mode: &int_mode)) |
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 (binoptab: optable) |
200 | || trapv_unoptab_p (unoptab: optable))) |
201 | minsize = INT_TYPE_SIZE; |
202 | if (GET_MODE_BITSIZE (mode: int_mode) < minsize |
203 | || GET_MODE_BITSIZE (mode: int_mode) > maxsize) |
204 | return; |
205 | gen_libfunc (optable, opname, suffix, mode: int_mode); |
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 (dest: dec_opname, DECIMAL_PREFIX, n: sizeof (DECIMAL_PREFIX) - 1); |
224 | strcpy (dest: dec_opname + sizeof (DECIMAL_PREFIX) - 1, src: opname); |
225 | gen_libfunc (optable, opname: 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, opname: name, suffix, mode); |
272 | if (INTEGRAL_MODE_P (mode)) |
273 | gen_int_libfunc (optable, opname: 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, opname: name, suffix, mode); |
285 | if (GET_MODE_CLASS (mode) == MODE_INT) |
286 | { |
287 | int len = strlen (s: name); |
288 | char *v_name = XALLOCAVEC (char, len + 2); |
289 | strcpy (dest: v_name, src: name); |
290 | v_name[len] = 'v'; |
291 | v_name[len + 1] = 0; |
292 | gen_int_libfunc (optable, opname: 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, opname: name, suffix, mode); |
305 | if (INTEGRAL_MODE_P (mode)) |
306 | gen_int_libfunc (optable, opname: name, suffix, mode); |
307 | if (ALL_FIXED_POINT_MODE_P (mode)) |
308 | gen_fixed_libfunc (optable, opname: 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, opname: name, suffix, mode); |
320 | if (INTEGRAL_MODE_P (mode)) |
321 | gen_int_libfunc (optable, opname: name, suffix, mode); |
322 | if (SIGNED_FIXED_POINT_MODE_P (mode)) |
323 | gen_signed_fixed_libfunc (optable, opname: 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, opname: name, suffix, mode); |
335 | if (ALL_FIXED_POINT_MODE_P (mode)) |
336 | gen_fixed_libfunc (optable, opname: 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, opname: name, suffix, mode); |
348 | if (SIGNED_FIXED_POINT_MODE_P (mode)) |
349 | gen_signed_fixed_libfunc (optable, opname: 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, opname: name, suffix, mode); |
361 | if (UNSIGNED_FIXED_POINT_MODE_P (mode)) |
362 | gen_unsigned_fixed_libfunc (optable, opname: 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 (s: 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 (dest: &nondec_name[prefix_len], src: opname, n: 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 (dest: &dec_name[2], DECIMAL_PREFIX, n: dec_len); |
411 | memcpy (dest: &dec_name[2+dec_len], src: opname, n: 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 (contents: libfunc_name, length: 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, opname: "floatuns" , tmode, fmode); |
467 | else |
468 | gen_int_to_fp_conv_libfunc (tab, opname: "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 (s: 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 (dest: &nondec_name[prefix_len], src: opname, n: 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 (dest: &dec_name[2], DECIMAL_PREFIX, n: dec_len); |
544 | memcpy (dest: &dec_name[2 + dec_len], src: opname, n: 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 (contents: libfunc_name, length: 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 | { |
583 | scalar_float_mode float_tmode, float_fmode; |
584 | if (!is_a <scalar_float_mode> (m: fmode, result: &float_fmode) |
585 | || !is_a <scalar_float_mode> (m: tmode, result: &float_tmode) |
586 | || float_tmode == float_fmode) |
587 | return; |
588 | |
589 | if (GET_MODE_CLASS (float_tmode) != GET_MODE_CLASS (float_fmode)) |
590 | gen_interclass_conv_libfunc (tab, opname, tmode: float_tmode, fmode: float_fmode); |
591 | |
592 | if (GET_MODE_PRECISION (mode: float_fmode) <= GET_MODE_PRECISION (mode: float_tmode)) |
593 | return; |
594 | |
595 | if (GET_MODE_CLASS (float_tmode) == GET_MODE_CLASS (float_fmode)) |
596 | gen_intraclass_conv_libfunc (tab, opname, tmode: float_tmode, fmode: float_fmode); |
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 | { |
608 | scalar_float_mode float_tmode, float_fmode; |
609 | if (!is_a <scalar_float_mode> (m: fmode, result: &float_fmode) |
610 | || !is_a <scalar_float_mode> (m: tmode, result: &float_tmode) |
611 | || float_tmode == float_fmode) |
612 | return; |
613 | |
614 | if (GET_MODE_CLASS (float_tmode) != GET_MODE_CLASS (float_fmode)) |
615 | gen_interclass_conv_libfunc (tab, opname, tmode: float_tmode, fmode: float_fmode); |
616 | |
617 | if (GET_MODE_PRECISION (mode: float_fmode) > GET_MODE_PRECISION (mode: float_tmode)) |
618 | return; |
619 | |
620 | if (GET_MODE_CLASS (float_tmode) == GET_MODE_CLASS (float_fmode)) |
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 | |
722 | /* Build a decl for a libfunc named NAME with visibility VIS. */ |
723 | |
724 | tree |
725 | build_libfunc_function_visibility (const char *name, symbol_visibility vis) |
726 | { |
727 | /* ??? We don't have any type information; pretend this is "int foo ()". */ |
728 | tree decl = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL, |
729 | get_identifier (name), |
730 | build_function_type (integer_type_node, NULL_TREE)); |
731 | DECL_EXTERNAL (decl) = 1; |
732 | TREE_PUBLIC (decl) = 1; |
733 | DECL_ARTIFICIAL (decl) = 1; |
734 | DECL_VISIBILITY (decl) = vis; |
735 | DECL_VISIBILITY_SPECIFIED (decl) = 1; |
736 | gcc_assert (DECL_ASSEMBLER_NAME (decl)); |
737 | |
738 | return decl; |
739 | } |
740 | |
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, vis: VISIBILITY_DEFAULT); |
747 | } |
748 | |
749 | /* Return a libfunc for NAME, creating one if we don't already have one. |
750 | The decl is given visibility VIS. The returned rtx is a SYMBOL_REF. */ |
751 | |
752 | rtx |
753 | init_one_libfunc_visibility (const char *name, symbol_visibility vis) |
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 (n: 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 (comparable: id, hash, insert: 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. */ |
770 | decl = build_libfunc_function_visibility (name, vis); |
771 | *slot = decl; |
772 | } |
773 | return XEXP (DECL_RTL (decl), 0); |
774 | } |
775 | |
776 | rtx |
777 | init_one_libfunc (const char *name) |
778 | { |
779 | return init_one_libfunc_visibility (name, vis: VISIBILITY_DEFAULT); |
780 | } |
781 | |
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 (comparable: id, hash, insert: 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 (value: &e, insert: 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 (value: &e, insert: 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 (n: 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) |
872 | { |
873 | scalar_int_mode mode = int_mode_for_size (INT_TYPE_SIZE, limit: 0).require (); |
874 | set_optab_libfunc (op: ffs_optab, mode, name: "ffs" ); |
875 | } |
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 (op: bswap_optab, SImode, name: "__gnu_bswapsi2" ); |
882 | set_optab_libfunc (op: bswap_optab, DImode, name: "__gnu_bswapdi2" ); |
883 | } |
884 | else |
885 | { |
886 | set_optab_libfunc (op: bswap_optab, SImode, name: "__bswapsi2" ); |
887 | set_optab_libfunc (op: bswap_optab, DImode, name: "__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 (op: abs_optab, TYPE_MODE (complex_double_type_node), |
894 | name: "cabs" ); |
895 | |
896 | unwind_sjlj_register_libfunc = init_one_libfunc (name: "_Unwind_SjLj_Register" ); |
897 | unwind_sjlj_unregister_libfunc |
898 | = init_one_libfunc (name: "_Unwind_SjLj_Unregister" ); |
899 | |
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 (s: base); |
913 | int i; |
914 | |
915 | gcc_assert (max <= 8); |
916 | gcc_assert (len + 3 < sizeof (buf)); |
917 | |
918 | memcpy (dest: buf, src: base, n: 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 | { |
926 | if (i > 1) |
927 | mode = GET_MODE_2XWIDER_MODE (m: mode).require (); |
928 | buf[len + 1] = '0' + i; |
929 | set_optab_libfunc (op: tab, mode, name: buf); |
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 (tab: sync_compare_and_swap_optab, |
940 | base: "__sync_val_compare_and_swap" , max); |
941 | init_sync_libfuncs_1 (tab: sync_lock_test_and_set_optab, |
942 | base: "__sync_lock_test_and_set" , max); |
943 | |
944 | init_sync_libfuncs_1 (tab: sync_old_add_optab, base: "__sync_fetch_and_add" , max); |
945 | init_sync_libfuncs_1 (tab: sync_old_sub_optab, base: "__sync_fetch_and_sub" , max); |
946 | init_sync_libfuncs_1 (tab: sync_old_ior_optab, base: "__sync_fetch_and_or" , max); |
947 | init_sync_libfuncs_1 (tab: sync_old_and_optab, base: "__sync_fetch_and_and" , max); |
948 | init_sync_libfuncs_1 (tab: sync_old_xor_optab, base: "__sync_fetch_and_xor" , max); |
949 | init_sync_libfuncs_1 (tab: sync_old_nand_optab, base: "__sync_fetch_and_nand" , max); |
950 | |
951 | init_sync_libfuncs_1 (tab: sync_new_add_optab, base: "__sync_add_and_fetch" , max); |
952 | init_sync_libfuncs_1 (tab: sync_new_sub_optab, base: "__sync_sub_and_fetch" , max); |
953 | init_sync_libfuncs_1 (tab: sync_new_ior_optab, base: "__sync_or_and_fetch" , max); |
954 | init_sync_libfuncs_1 (tab: sync_new_and_optab, base: "__sync_and_and_fetch" , max); |
955 | init_sync_libfuncs_1 (tab: sync_new_xor_optab, base: "__sync_xor_and_fetch" , max); |
956 | init_sync_libfuncs_1 (tab: sync_new_nand_optab, base: "__sync_nand_and_fetch" , max); |
957 | } |
958 | |
959 | #include "gt-optabs-libfuncs.h" |
960 | |