2 * Copyright (C) 1995-2011 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief Data modes of operations.
23 * @author Martin Trapp, Christian Schaefer, Goetz Lindenmaier, Mathias Heil
41 #include "pattern_dmp.h"
43 /** Obstack to hold all modes. */
44 static struct obstack modes;
46 /** The list of all currently existing modes. */
47 static ir_mode **mode_list;
49 static bool modes_are_equal(const ir_mode *m, const ir_mode *n)
51 return m->sort == n->sort &&
52 m->arithmetic == n->arithmetic &&
55 m->modulo_shift == n->modulo_shift;
59 * searches the modes obstack for the given mode and returns
60 * a pointer on an equal mode already in the array, NULL if
63 static ir_mode *find_mode(const ir_mode *m)
66 for (i = 0, n_modes = ARR_LEN(mode_list); i < n_modes; ++i) {
67 ir_mode *n = mode_list[i];
68 if (modes_are_equal(n, m))
75 * sets special values of modes
77 static void set_mode_values(ir_mode* mode)
79 switch (get_mode_sort(mode)) {
82 case irms_float_number:
83 mode->min = get_tarval_min(mode);
84 mode->max = get_tarval_max(mode);
85 mode->null = get_tarval_null(mode);
86 mode->one = get_tarval_one(mode);
87 mode->minus_one = get_tarval_minus_one(mode);
88 if (get_mode_sort(mode) != irms_float_number) {
89 mode->all_one = get_tarval_all_one(mode);
91 mode->all_one = tarval_bad;
95 case irms_internal_boolean:
96 mode->min = tarval_b_false;
97 mode->max = tarval_b_true;
98 mode->null = tarval_b_false;
99 mode->one = tarval_b_true;
100 mode->minus_one = tarval_bad;
101 mode->all_one = tarval_b_true;
104 case irms_control_flow:
110 mode->min = tarval_bad;
111 mode->max = tarval_bad;
112 mode->null = tarval_bad;
113 mode->one = tarval_bad;
114 mode->minus_one = tarval_bad;
144 ir_mode *mode_P_code;
145 ir_mode *mode_P_data;
147 ir_mode *get_modeT(void) { return mode_T; }
148 ir_mode *get_modeF(void) { return mode_F; }
149 ir_mode *get_modeD(void) { return mode_D; }
150 ir_mode *get_modeQ(void) { return mode_Q; }
151 ir_mode *get_modeBs(void) { return mode_Bs; }
152 ir_mode *get_modeBu(void) { return mode_Bu; }
153 ir_mode *get_modeHs(void) { return mode_Hs; }
154 ir_mode *get_modeHu(void) { return mode_Hu; }
155 ir_mode *get_modeIs(void) { return mode_Is; }
156 ir_mode *get_modeIu(void) { return mode_Iu; }
157 ir_mode *get_modeLs(void) { return mode_Ls; }
158 ir_mode *get_modeLu(void) { return mode_Lu; }
159 ir_mode *get_modeLLs(void){ return mode_LLs; }
160 ir_mode *get_modeLLu(void){ return mode_LLu; }
161 ir_mode *get_modeb(void) { return mode_b; }
162 ir_mode *get_modeP(void) { return mode_P; }
163 ir_mode *get_modeX(void) { return mode_X; }
164 ir_mode *get_modeM(void) { return mode_M; }
165 ir_mode *get_modeBB(void) { return mode_BB; }
166 ir_mode *get_modeANY(void) { return mode_ANY; }
167 ir_mode *get_modeBAD(void) { return mode_BAD; }
170 ir_mode *(get_modeP_code)(void)
172 return get_modeP_code_();
175 ir_mode *(get_modeP_data)(void)
177 return get_modeP_data_();
180 void set_modeP_code(ir_mode *p)
182 assert(mode_is_reference(p));
186 void set_modeP_data(ir_mode *p)
188 assert(mode_is_reference(p));
194 * Creates a new mode.
196 static ir_mode *alloc_mode(const char *name, ir_mode_sort sort,
197 ir_mode_arithmetic arithmetic, unsigned bit_size,
198 int sign, unsigned modulo_shift)
200 ir_mode *mode_tmpl = OALLOCZ(&modes, ir_mode);
202 mode_tmpl->name = new_id_from_str(name);
203 mode_tmpl->sort = sort;
204 mode_tmpl->size = bit_size;
205 mode_tmpl->sign = sign ? 1 : 0;
206 mode_tmpl->modulo_shift = modulo_shift;
207 mode_tmpl->arithmetic = arithmetic;
208 mode_tmpl->link = NULL;
209 mode_tmpl->tv_priv = NULL;
213 static ir_mode *register_mode(ir_mode *mode)
215 /* does any of the existing modes have the same properties? */
216 ir_mode *old = find_mode(mode);
218 /* remove new mode from obstack */
219 obstack_free(&modes, mode);
223 mode->kind = k_ir_mode;
224 mode->type = new_type_primitive(mode);
225 ARR_APP1(ir_mode*, mode_list, mode);
226 set_mode_values(mode);
231 ir_mode *new_int_mode(const char *name, ir_mode_arithmetic arithmetic,
232 unsigned bit_size, int sign, unsigned modulo_shift)
234 ir_mode *result = alloc_mode(name, irms_int_number, arithmetic, bit_size,
236 return register_mode(result);
239 ir_mode *new_reference_mode(const char *name, ir_mode_arithmetic arithmetic,
240 unsigned bit_size, unsigned modulo_shift)
242 ir_mode *result = alloc_mode(name, irms_reference, arithmetic, bit_size,
244 return register_mode(result);
247 ir_mode *new_float_mode(const char *name, ir_mode_arithmetic arithmetic,
248 unsigned exponent_size, unsigned mantissa_size)
250 bool explicit_one = false;
251 unsigned bit_size = exponent_size + mantissa_size + 1;
254 if (arithmetic == irma_x86_extended_float) {
257 } else if (arithmetic != irma_ieee754) {
258 panic("Arithmetic %s invalid for float");
260 if (exponent_size >= 256)
261 panic("Exponents >= 256 bits not supported");
262 if (mantissa_size >= 256)
263 panic("Mantissa >= 256 bits not supported");
265 result = alloc_mode(name, irms_float_number, irma_x86_extended_float, bit_size, 1, 0);
266 result->float_desc.exponent_size = exponent_size;
267 result->float_desc.mantissa_size = mantissa_size;
268 result->float_desc.explicit_one = explicit_one;
269 return register_mode(result);
272 ident *(get_mode_ident)(const ir_mode *mode)
274 return get_mode_ident_(mode);
277 const char *get_mode_name(const ir_mode *mode)
279 return get_id_str(mode->name);
282 unsigned (get_mode_size_bits)(const ir_mode *mode)
284 return get_mode_size_bits_(mode);
287 unsigned (get_mode_size_bytes)(const ir_mode *mode)
289 return get_mode_size_bytes_(mode);
292 int (get_mode_sign)(const ir_mode *mode)
294 return get_mode_sign_(mode);
297 ir_mode_arithmetic (get_mode_arithmetic)(const ir_mode *mode)
299 return get_mode_arithmetic_(mode);
303 unsigned int (get_mode_modulo_shift)(const ir_mode *mode)
305 return get_mode_modulo_shift_(mode);
308 void *(get_mode_link)(const ir_mode *mode)
310 return get_mode_link_(mode);
313 void (set_mode_link)(ir_mode *mode, void *l)
315 set_mode_link_(mode, l);
318 ir_tarval *get_mode_min(ir_mode *mode)
321 assert(mode_is_data(mode));
326 ir_tarval *get_mode_max(ir_mode *mode)
329 assert(mode_is_data(mode));
334 ir_tarval *get_mode_null(ir_mode *mode)
337 assert(mode_is_datab(mode));
342 ir_tarval *get_mode_one(ir_mode *mode)
345 assert(mode_is_datab(mode));
350 ir_tarval *get_mode_minus_one(ir_mode *mode)
353 assert(mode_is_data(mode));
355 return mode->minus_one;
358 ir_tarval *get_mode_all_one(ir_mode *mode)
361 assert(mode_is_datab(mode));
362 return mode->all_one;
365 ir_tarval *get_mode_infinite(ir_mode *mode)
368 assert(mode_is_float(mode));
370 return get_tarval_plus_inf(mode);
373 ir_tarval *get_mode_NAN(ir_mode *mode)
376 assert(mode_is_float(mode));
378 return get_tarval_nan(mode);
381 int is_mode(const void *thing)
383 return get_kind(thing) == k_ir_mode;
386 int (mode_is_signed)(const ir_mode *mode)
388 return mode_is_signed_(mode);
391 int (mode_is_float)(const ir_mode *mode)
393 return mode_is_float_(mode);
396 int (mode_is_int)(const ir_mode *mode)
398 return mode_is_int_(mode);
401 int (mode_is_reference)(const ir_mode *mode)
403 return mode_is_reference_(mode);
406 int (mode_is_num)(const ir_mode *mode)
408 return mode_is_num_(mode);
411 int (mode_is_data)(const ir_mode *mode)
413 return mode_is_data_(mode);
416 int (mode_is_datab)(const ir_mode *mode)
418 return mode_is_datab_(mode);
421 int (mode_is_dataM)(const ir_mode *mode)
423 return mode_is_dataM_(mode);
426 unsigned (get_mode_mantissa_size)(const ir_mode *mode)
428 return get_mode_mantissa_size_(mode);
431 unsigned (get_mode_exponent_size)(const ir_mode *mode)
433 return get_mode_exponent_size_(mode);
436 int smaller_mode(const ir_mode *sm, const ir_mode *lm)
438 int sm_bits, lm_bits;
443 if (sm == lm) return 1;
445 sm_bits = get_mode_size_bits(sm);
446 lm_bits = get_mode_size_bits(lm);
448 switch (get_mode_sort(sm)) {
449 case irms_int_number:
450 switch (get_mode_sort(lm)) {
451 case irms_int_number:
452 if (get_mode_arithmetic(sm) != get_mode_arithmetic(lm))
455 /* only two complement implemented */
456 assert(get_mode_arithmetic(sm) == irma_twos_complement);
458 /* integers are convertable if
459 * - both have the same sign and lm is the larger one
460 * - lm is the signed one and is at least two bits larger
461 * (one for the sign, one for the highest bit of sm)
462 * - sm & lm are two_complement and lm has greater or equal number of bits
464 if (mode_is_signed(sm)) {
465 if (!mode_is_signed(lm))
467 return sm_bits <= lm_bits;
469 if (mode_is_signed(lm)) {
470 return sm_bits < lm_bits;
472 return sm_bits <= lm_bits;
475 case irms_float_number:
476 /* int to float works if the float is large enough */
484 case irms_float_number:
485 if (get_mode_arithmetic(sm) == get_mode_arithmetic(lm)) {
486 if ( (get_mode_sort(lm) == irms_float_number)
487 && (get_mode_size_bits(lm) >= get_mode_size_bits(sm)) )
493 /* do exist machines out there with different pointer lengths ?*/
496 case irms_internal_boolean:
497 return mode_is_int(lm);
507 int values_in_mode(const ir_mode *sm, const ir_mode *lm)
513 return mode_is_int(lm) || mode_is_float(lm);
515 ir_mode_arithmetic larith = get_mode_arithmetic(lm);
516 ir_mode_arithmetic sarith = get_mode_arithmetic(sm);
518 case irma_x86_extended_float:
520 if (sarith == irma_ieee754 || sarith == irma_x86_extended_float) {
521 return get_mode_size_bits(sm) <= get_mode_size_bits(lm);
522 } else if (sarith == irma_twos_complement) {
523 unsigned int_mantissa = get_mode_size_bits(sm) - (mode_is_signed(sm) ? 1 : 0);
524 unsigned float_mantissa = get_mode_mantissa_size(lm) + 1;
525 return int_mantissa <= float_mantissa;
528 case irma_twos_complement:
529 if (sarith == irma_twos_complement) {
530 return get_mode_size_bits(sm) <= get_mode_size_bits(lm);
539 ir_mode *get_reference_mode_signed_eq(ir_mode *mode)
541 assert(mode_is_reference(mode));
542 return mode->eq_signed;
545 void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode)
547 assert(mode_is_reference(ref_mode));
548 assert(mode_is_int(int_mode));
549 ref_mode->eq_signed = int_mode;
552 ir_mode *get_reference_mode_unsigned_eq(ir_mode *mode)
554 assert(mode_is_reference(mode));
555 return mode->eq_unsigned;
558 void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode)
560 assert(mode_is_reference(ref_mode));
561 assert(mode_is_int(int_mode));
562 ref_mode->eq_unsigned = int_mode;
565 static ir_mode *new_internal_mode(const char *name, ir_mode_sort sort)
567 ir_mode *mode = alloc_mode(name, sort, irma_none, 0, 0, 0);
568 return register_mode(mode);
573 obstack_init(&modes);
574 mode_list = NEW_ARR_F(ir_mode*, 0);
576 /* initialize predefined modes */
577 mode_BB = new_internal_mode("BB", irms_block);
578 mode_X = new_internal_mode("X", irms_control_flow);
579 mode_M = new_internal_mode("M", irms_memory);
580 mode_T = new_internal_mode("T", irms_tuple);
581 mode_ANY = new_internal_mode("ANY", irms_any);
582 mode_BAD = new_internal_mode("BAD", irms_bad);
583 mode_b = new_internal_mode("b", irms_internal_boolean);
585 mode_F = new_float_mode("F", irma_ieee754, 8, 23);
586 mode_D = new_float_mode("D", irma_ieee754, 11, 52);
587 mode_Q = new_float_mode("Q", irma_ieee754, 15, 112);
589 mode_Bs = new_int_mode("Bs", irma_twos_complement, 8, 1, 32);
590 mode_Bu = new_int_mode("Bu", irma_twos_complement, 8, 0, 32);
591 mode_Hs = new_int_mode("Hs", irma_twos_complement, 16, 1, 32);
592 mode_Hu = new_int_mode("Hu", irma_twos_complement, 16, 0, 32);
593 mode_Is = new_int_mode("Is", irma_twos_complement, 32, 1, 32);
594 mode_Iu = new_int_mode("Iu", irma_twos_complement, 32, 0, 32);
595 mode_Ls = new_int_mode("Ls", irma_twos_complement, 64, 1, 64);
596 mode_Lu = new_int_mode("Lu", irma_twos_complement, 64, 0, 64);
597 mode_LLs = new_int_mode("LLs", irma_twos_complement, 128, 1, 128);
598 mode_LLu = new_int_mode("LLu", irma_twos_complement, 128, 0, 128);
600 mode_P = new_reference_mode("P", irma_twos_complement, 32, 32);
601 set_reference_mode_signed_eq(mode_P, mode_Is);
602 set_reference_mode_unsigned_eq(mode_P, mode_Iu);
604 /* set the machine specific modes to the predefined ones */
605 mode_P_code = mode_P;
606 mode_P_data = mode_P;
609 ir_mode *find_unsigned_mode(const ir_mode *mode)
613 /* allowed for reference mode */
614 if (mode->sort == irms_reference)
615 n.sort = irms_int_number;
617 assert(n.sort == irms_int_number);
619 return find_mode(&n);
622 ir_mode *find_signed_mode(const ir_mode *mode)
626 assert(mode->sort == irms_int_number);
628 return find_mode(&n);
631 ir_mode *find_double_bits_int_mode(const ir_mode *mode)
635 assert(mode->sort == irms_int_number && mode->arithmetic == irma_twos_complement);
637 n.size = 2*mode->size;
638 return find_mode(&n);
641 int mode_honor_signed_zeros(const ir_mode *mode)
643 /* for floating point, we know that IEEE 754 has +0 and -0,
644 * but always handles it identical.
647 mode->sort == irms_float_number &&
648 mode->arithmetic != irma_ieee754;
651 int mode_overflow_on_unary_Minus(const ir_mode *mode)
653 if (mode->sort == irms_float_number)
654 return mode->arithmetic == irma_ieee754 ? 0 : 1;
658 int mode_wrap_around(const ir_mode *mode)
660 /* FIXME: better would be an extra mode property */
661 return mode_is_int(mode);
664 int is_reinterpret_cast(const ir_mode *src, const ir_mode *dst)
666 ir_mode_arithmetic ma;
670 if (get_mode_size_bits(src) != get_mode_size_bits(dst))
672 ma = get_mode_arithmetic(src);
673 if (ma != get_mode_arithmetic(dst))
676 return ma == irma_twos_complement;
679 ir_type *(get_type_for_mode) (const ir_mode *mode)
681 return get_type_for_mode_(mode);
684 size_t ir_get_n_modes(void)
686 return ARR_LEN(mode_list);
689 ir_mode *ir_get_mode(size_t num)
691 assert(num < ARR_LEN(mode_list));
692 return mode_list[num];
695 void finish_mode(void)
697 obstack_free(&modes, 0);
698 DEL_ARR_F(mode_list);