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);
227 set_mode_values(mode);
232 ir_mode *new_int_mode(const char *name, ir_mode_arithmetic arithmetic,
233 unsigned bit_size, int sign, unsigned modulo_shift)
235 ir_mode *result = alloc_mode(name, irms_int_number, arithmetic, bit_size,
237 return register_mode(result);
240 ir_mode *new_reference_mode(const char *name, ir_mode_arithmetic arithmetic,
241 unsigned bit_size, unsigned modulo_shift)
243 ir_mode *result = alloc_mode(name, irms_reference, arithmetic, bit_size,
245 return register_mode(result);
248 ir_mode *new_float_mode(const char *name, ir_mode_arithmetic arithmetic,
249 unsigned exponent_size, unsigned mantissa_size)
251 bool explicit_one = false;
252 unsigned bit_size = exponent_size + mantissa_size + 1;
255 if (arithmetic == irma_x86_extended_float) {
258 } else if (arithmetic != irma_ieee754) {
259 panic("Arithmetic %s invalid for float");
261 if (exponent_size >= 256)
262 panic("Exponents >= 256 bits not supported");
263 if (mantissa_size >= 256)
264 panic("Mantissa >= 256 bits not supported");
266 result = alloc_mode(name, irms_float_number, irma_x86_extended_float, bit_size, 1, 0);
267 result->float_desc.exponent_size = exponent_size;
268 result->float_desc.mantissa_size = mantissa_size;
269 result->float_desc.explicit_one = explicit_one;
270 return register_mode(result);
273 ident *(get_mode_ident)(const ir_mode *mode)
275 return get_mode_ident_(mode);
278 const char *get_mode_name(const ir_mode *mode)
280 return get_id_str(mode->name);
283 unsigned (get_mode_size_bits)(const ir_mode *mode)
285 return get_mode_size_bits_(mode);
288 unsigned (get_mode_size_bytes)(const ir_mode *mode)
290 return get_mode_size_bytes_(mode);
293 int (get_mode_sign)(const ir_mode *mode)
295 return get_mode_sign_(mode);
298 ir_mode_arithmetic (get_mode_arithmetic)(const ir_mode *mode)
300 return get_mode_arithmetic_(mode);
304 unsigned int (get_mode_modulo_shift)(const ir_mode *mode)
306 return get_mode_modulo_shift_(mode);
309 void *(get_mode_link)(const ir_mode *mode)
311 return get_mode_link_(mode);
314 void (set_mode_link)(ir_mode *mode, void *l)
316 set_mode_link_(mode, l);
319 ir_tarval *get_mode_min(ir_mode *mode)
322 assert(mode_is_data(mode));
327 ir_tarval *get_mode_max(ir_mode *mode)
330 assert(mode_is_data(mode));
335 ir_tarval *get_mode_null(ir_mode *mode)
338 assert(mode_is_datab(mode));
343 ir_tarval *get_mode_one(ir_mode *mode)
346 assert(mode_is_datab(mode));
351 ir_tarval *get_mode_minus_one(ir_mode *mode)
354 assert(mode_is_data(mode));
356 return mode->minus_one;
359 ir_tarval *get_mode_all_one(ir_mode *mode)
362 assert(mode_is_datab(mode));
363 return mode->all_one;
366 ir_tarval *get_mode_infinite(ir_mode *mode)
369 assert(mode_is_float(mode));
371 return get_tarval_plus_inf(mode);
374 ir_tarval *get_mode_NAN(ir_mode *mode)
377 assert(mode_is_float(mode));
379 return get_tarval_nan(mode);
382 int is_mode(const void *thing)
384 return get_kind(thing) == k_ir_mode;
387 int (mode_is_signed)(const ir_mode *mode)
389 return mode_is_signed_(mode);
392 int (mode_is_float)(const ir_mode *mode)
394 return mode_is_float_(mode);
397 int (mode_is_int)(const ir_mode *mode)
399 return mode_is_int_(mode);
402 int (mode_is_reference)(const ir_mode *mode)
404 return mode_is_reference_(mode);
407 int (mode_is_num)(const ir_mode *mode)
409 return mode_is_num_(mode);
412 int (mode_is_data)(const ir_mode *mode)
414 return mode_is_data_(mode);
417 int (mode_is_datab)(const ir_mode *mode)
419 return mode_is_datab_(mode);
422 int (mode_is_dataM)(const ir_mode *mode)
424 return mode_is_dataM_(mode);
427 unsigned (get_mode_mantissa_size)(const ir_mode *mode)
429 return get_mode_mantissa_size_(mode);
432 unsigned (get_mode_exponent_size)(const ir_mode *mode)
434 return get_mode_exponent_size_(mode);
437 int smaller_mode(const ir_mode *sm, const ir_mode *lm)
439 int sm_bits, lm_bits;
444 if (sm == lm) return 1;
446 sm_bits = get_mode_size_bits(sm);
447 lm_bits = get_mode_size_bits(lm);
449 switch (get_mode_sort(sm)) {
450 case irms_int_number:
451 switch (get_mode_sort(lm)) {
452 case irms_int_number:
453 if (get_mode_arithmetic(sm) != get_mode_arithmetic(lm))
456 /* only two complement implemented */
457 assert(get_mode_arithmetic(sm) == irma_twos_complement);
459 /* integers are convertable if
460 * - both have the same sign and lm is the larger one
461 * - lm is the signed one and is at least two bits larger
462 * (one for the sign, one for the highest bit of sm)
463 * - sm & lm are two_complement and lm has greater or equal number of bits
465 if (mode_is_signed(sm)) {
466 if (!mode_is_signed(lm))
468 return sm_bits <= lm_bits;
470 if (mode_is_signed(lm)) {
471 return sm_bits < lm_bits;
473 return sm_bits <= lm_bits;
476 case irms_float_number:
477 /* int to float works if the float is large enough */
485 case irms_float_number:
486 if (get_mode_arithmetic(sm) == get_mode_arithmetic(lm)) {
487 if ( (get_mode_sort(lm) == irms_float_number)
488 && (get_mode_size_bits(lm) >= get_mode_size_bits(sm)) )
494 /* do exist machines out there with different pointer lengths ?*/
497 case irms_internal_boolean:
498 return mode_is_int(lm);
508 int values_in_mode(const ir_mode *sm, const ir_mode *lm)
510 ir_mode_arithmetic arith;
515 if (sm == lm) return 1;
518 return mode_is_int(lm);
520 arith = get_mode_arithmetic(sm);
521 if (arith != get_mode_arithmetic(lm))
525 case irma_twos_complement:
527 return get_mode_size_bits(sm) <= get_mode_size_bits(lm);
534 ir_mode *get_reference_mode_signed_eq(ir_mode *mode)
536 assert(mode_is_reference(mode));
537 return mode->eq_signed;
540 void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode)
542 assert(mode_is_reference(ref_mode));
543 assert(mode_is_int(int_mode));
544 ref_mode->eq_signed = int_mode;
547 ir_mode *get_reference_mode_unsigned_eq(ir_mode *mode)
549 assert(mode_is_reference(mode));
550 return mode->eq_unsigned;
553 void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode)
555 assert(mode_is_reference(ref_mode));
556 assert(mode_is_int(int_mode));
557 ref_mode->eq_unsigned = int_mode;
560 static ir_mode *new_internal_mode(const char *name, ir_mode_sort sort)
562 ir_mode *mode = alloc_mode(name, sort, irma_none, 0, 0, 0);
563 return register_mode(mode);
568 obstack_init(&modes);
569 mode_list = NEW_ARR_F(ir_mode*, 0);
571 /* initialize predefined modes */
572 mode_BB = new_internal_mode("BB", irms_block);
573 mode_X = new_internal_mode("X", irms_control_flow);
574 mode_M = new_internal_mode("M", irms_memory);
575 mode_T = new_internal_mode("T", irms_tuple);
576 mode_ANY = new_internal_mode("ANY", irms_any);
577 mode_BAD = new_internal_mode("BAD", irms_bad);
578 mode_b = new_internal_mode("b", irms_internal_boolean);
580 mode_F = new_float_mode("F", irma_ieee754, 8, 23);
581 mode_D = new_float_mode("D", irma_ieee754, 11, 52);
582 mode_Q = new_float_mode("Q", irma_ieee754, 15, 112);
584 mode_Bs = new_int_mode("Bs", irma_twos_complement, 8, 1, 32);
585 mode_Bu = new_int_mode("Bu", irma_twos_complement, 8, 0, 32);
586 mode_Hs = new_int_mode("Hs", irma_twos_complement, 16, 1, 32);
587 mode_Hu = new_int_mode("Hu", irma_twos_complement, 16, 0, 32);
588 mode_Is = new_int_mode("Is", irma_twos_complement, 32, 1, 32);
589 mode_Iu = new_int_mode("Iu", irma_twos_complement, 32, 0, 32);
590 mode_Ls = new_int_mode("Ls", irma_twos_complement, 64, 1, 64);
591 mode_Lu = new_int_mode("Lu", irma_twos_complement, 64, 0, 64);
592 mode_LLs = new_int_mode("LLs", irma_twos_complement, 128, 1, 128);
593 mode_LLu = new_int_mode("LLu", irma_twos_complement, 128, 0, 128);
595 mode_P = new_reference_mode("P", irma_twos_complement, 32, 32);
596 set_reference_mode_signed_eq(mode_P, mode_Is);
597 set_reference_mode_unsigned_eq(mode_P, mode_Iu);
599 /* set the machine specific modes to the predefined ones */
600 mode_P_code = mode_P;
601 mode_P_data = mode_P;
604 ir_mode *find_unsigned_mode(const ir_mode *mode)
608 /* allowed for reference mode */
609 if (mode->sort == irms_reference)
610 n.sort = irms_int_number;
612 assert(n.sort == irms_int_number);
614 return find_mode(&n);
617 ir_mode *find_signed_mode(const ir_mode *mode)
621 assert(mode->sort == irms_int_number);
623 return find_mode(&n);
626 ir_mode *find_double_bits_int_mode(const ir_mode *mode)
630 assert(mode->sort == irms_int_number && mode->arithmetic == irma_twos_complement);
632 n.size = 2*mode->size;
633 return find_mode(&n);
636 int mode_honor_signed_zeros(const ir_mode *mode)
638 /* for floating point, we know that IEEE 754 has +0 and -0,
639 * but always handles it identical.
642 mode->sort == irms_float_number &&
643 mode->arithmetic != irma_ieee754;
646 int mode_overflow_on_unary_Minus(const ir_mode *mode)
648 if (mode->sort == irms_float_number)
649 return mode->arithmetic == irma_ieee754 ? 0 : 1;
653 int mode_wrap_around(const ir_mode *mode)
655 /* FIXME: better would be an extra mode property */
656 return mode_is_int(mode);
659 int is_reinterpret_cast(const ir_mode *src, const ir_mode *dst)
661 ir_mode_arithmetic ma;
665 if (get_mode_size_bits(src) != get_mode_size_bits(dst))
667 ma = get_mode_arithmetic(src);
668 if (ma != get_mode_arithmetic(dst))
671 return ma == irma_twos_complement;
674 ir_type *(get_type_for_mode) (const ir_mode *mode)
676 return get_type_for_mode_(mode);
679 void finish_mode(void)
681 obstack_free(&modes, 0);
682 DEL_ARR_F(mode_list);