2 * Copyright (C) 1995-2007 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
39 # include "irprog_t.h"
40 # include "irmode_t.h"
52 /** dynamic array to hold all modes */
53 static struct obstack modes;
55 /** number of defined modes */
56 static int num_modes = 0;
63 * Compare modes that don't need to have their code field
66 * TODO: Add other fields
68 INLINE static int modes_are_equal(const ir_mode *m, const ir_mode *n) {
70 if (m->sort == n->sort &&
71 m->arithmetic == n->arithmetic &&
74 m->modulo_shift == n->modulo_shift &&
75 m->vector_elem == n->vector_elem)
82 * calculates the next obstack address
84 static void *next_obstack_adr(struct obstack *o, void *p, size_t s) {
85 PTR_INT_TYPE adr = PTR_TO_INT((char *)p);
86 int mask = obstack_alignment_mask(o);
90 return INT_TO_PTR(adr & ~mask);
94 * searches the modes obstack for the given mode and returns
95 * a pointer on an equal mode already in the array, NULL if
98 static ir_mode *find_mode(const ir_mode *m) {
100 struct _obstack_chunk *p;
103 n = (ir_mode *)p->contents;
104 nn = next_obstack_adr(&modes, n, sizeof(*n));
105 for (; (char *)nn <= modes.next_free;) {
107 if (modes_are_equal(n, m))
111 nn = next_obstack_adr(&modes, n, sizeof(*n));
114 for (p = p->prev; p; p = p->prev) {
115 n = (ir_mode *)p->contents;
116 nn = next_obstack_adr(&modes, n, sizeof(*n));
117 for (; (char *)nn < p->limit;) {
119 if (modes_are_equal(n, m))
123 nn = next_obstack_adr(&modes, n, sizeof(*n));
131 * sets special values of modes
133 static void set_mode_values(ir_mode* mode) {
134 switch (get_mode_sort(mode)) {
135 case irms_int_number:
136 case irms_float_number:
137 mode->min = get_tarval_min(mode);
138 mode->max = get_tarval_max(mode);
139 mode->null = get_tarval_null(mode);
140 mode->one = get_tarval_one(mode);
141 mode->minus_one = get_tarval_minus_one(mode);
144 case irms_internal_boolean:
145 mode->min = tarval_b_false;
146 mode->max = tarval_b_true;
147 mode->null = tarval_b_false;
148 mode->one = tarval_b_true;
149 mode->minus_one = tarval_bad;
153 mode->min = tarval_bad;
154 mode->max = tarval_bad;
155 mode->null = get_tarval_null(mode);
156 mode->one = tarval_bad;
157 mode->minus_one = tarval_bad;
162 case irms_control_flow:
163 mode->min = tarval_bad;
164 mode->max = tarval_bad;
165 mode->null = tarval_bad;
166 mode->one = tarval_bad;
167 mode->minus_one = tarval_bad;
173 * globals defined in irmode.h
176 /* --- Predefined modes --- */
178 /* FIRM internal modes: */
186 /* predefined numerical modes: */
187 ir_mode *mode_F; /* float */
188 ir_mode *mode_D; /* double */
189 ir_mode *mode_E; /* long double */
191 ir_mode *mode_Bs; /* integral values, signed and unsigned */
192 ir_mode *mode_Bu; /* 8 bit */
193 ir_mode *mode_Hs; /* 16 bit */
195 ir_mode *mode_Is; /* 32 bit */
197 ir_mode *mode_Ls; /* 64 bit */
199 ir_mode *mode_LLs; /* 128 bit */
205 /* machine specific modes */
206 ir_mode *mode_P_code; /**< machine specific pointer mode for code addresses */
207 ir_mode *mode_P_data; /**< machine specific pointer mode for data addresses */
210 * functions defined in irmode.h
213 /* JNI access functions */
214 ir_mode *get_modeT(void) { return mode_T; }
215 ir_mode *get_modeF(void) { return mode_F; }
216 ir_mode *get_modeD(void) { return mode_D; }
217 ir_mode *get_modeE(void) { return mode_E; }
218 ir_mode *get_modeBs(void) { return mode_Bs; }
219 ir_mode *get_modeBu(void) { return mode_Bu; }
220 ir_mode *get_modeHs(void) { return mode_Hs; }
221 ir_mode *get_modeHu(void) { return mode_Hu; }
222 ir_mode *get_modeIs(void) { return mode_Is; }
223 ir_mode *get_modeIu(void) { return mode_Iu; }
224 ir_mode *get_modeLs(void) { return mode_Ls; }
225 ir_mode *get_modeLu(void) { return mode_Lu; }
226 ir_mode *get_modeLLs(void){ return mode_LLs; }
227 ir_mode *get_modeLLu(void){ return mode_LLu; }
228 ir_mode *get_modeb(void) { return mode_b; }
229 ir_mode *get_modeP(void) { return mode_P; }
230 ir_mode *get_modeX(void) { return mode_X; }
231 ir_mode *get_modeM(void) { return mode_M; }
232 ir_mode *get_modeBB(void) { return mode_BB; }
233 ir_mode *get_modeANY(void) { return mode_ANY; }
234 ir_mode *get_modeBAD(void) { return mode_BAD; }
237 ir_mode *(get_modeP_code)(void) {
238 return _get_modeP_code();
241 ir_mode *(get_modeP_data)(void) {
242 return _get_modeP_data();
245 void set_modeP_code(ir_mode *p) {
246 assert(mode_is_reference(p));
250 void set_modeP_data(ir_mode *p) {
251 assert(mode_is_reference(p));
256 * Registers a new mode.
258 * @param new_mode The new mode template.
260 static ir_mode *register_mode(const ir_mode *new_mode) {
261 ir_mode *mode = NULL;
265 /* copy mode struct to modes array */
266 mode = (ir_mode *)obstack_copy(&modes, new_mode, sizeof(*mode));
268 mode->kind = k_ir_mode;
269 if (num_modes >= irm_max) {
270 mode->code = num_modes;
274 /* add the new mode to the irp list of modes */
277 set_mode_values(mode);
279 hook_new_mode(new_mode, mode);
284 * Creates a new mode.
286 ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign,
287 mode_arithmetic arithmetic, unsigned int modulo_shift)
290 ir_mode *mode = NULL;
292 mode_tmpl.name = new_id_from_str(name);
293 mode_tmpl.sort = sort;
294 mode_tmpl.size = bit_size;
295 mode_tmpl.sign = sign ? 1 : 0;
296 mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
297 mode_tmpl.vector_elem = 1;
298 mode_tmpl.arithmetic = arithmetic;
299 mode_tmpl.link = NULL;
300 mode_tmpl.tv_priv = NULL;
302 mode = find_mode(&mode_tmpl);
304 hook_new_mode(&mode_tmpl, mode);
311 case irms_control_flow:
313 case irms_internal_boolean:
314 assert(0 && "internal modes cannot be user defined");
317 case irms_float_number:
318 case irms_int_number:
320 mode = register_mode(&mode_tmpl);
326 * Creates a new vector mode.
328 ir_mode *new_ir_vector_mode(const char *name, mode_sort sort, int bit_size, unsigned num_of_elem, int sign,
329 mode_arithmetic arithmetic, unsigned int modulo_shift)
332 ir_mode *mode = NULL;
334 mode_tmpl.name = new_id_from_str(name);
335 mode_tmpl.sort = sort;
336 mode_tmpl.size = bit_size * num_of_elem;
337 mode_tmpl.sign = sign ? 1 : 0;
338 mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
339 mode_tmpl.vector_elem = num_of_elem;
340 mode_tmpl.arithmetic = arithmetic;
341 mode_tmpl.link = NULL;
342 mode_tmpl.tv_priv = NULL;
344 mode = find_mode(&mode_tmpl);
346 hook_new_mode(&mode_tmpl, mode);
350 if (num_of_elem <= 1) {
351 assert(0 && "vector modes should have at least 2 elements");
358 case irms_control_flow:
360 case irms_internal_boolean:
361 assert(0 && "internal modes cannot be user defined");
365 assert(0 && "only integer and floating point modes can be vectorized");
368 case irms_float_number:
369 assert(0 && "not yet implemented");
372 case irms_int_number:
373 mode = register_mode(&mode_tmpl);
378 /* Functions for the direct access to all attributes of an ir_mode */
380 (get_mode_modecode)(const ir_mode *mode) {
381 return _get_mode_modecode(mode);
385 (get_mode_ident)(const ir_mode *mode) {
386 return _get_mode_ident(mode);
390 get_mode_name(const ir_mode *mode) {
391 return get_id_str(mode->name);
395 (get_mode_sort)(const ir_mode* mode) {
396 return _get_mode_sort(mode);
400 (get_mode_size_bits)(const ir_mode *mode) {
401 return _get_mode_size_bits(mode);
405 (get_mode_size_bytes)(const ir_mode *mode) {
406 return _get_mode_size_bytes(mode);
410 (get_mode_sign)(const ir_mode *mode) {
411 return _get_mode_sign(mode);
415 (get_mode_arithmetic)(const ir_mode *mode) {
416 return get_mode_arithmetic(mode);
420 /* Attribute modulo shift specifies for modes of kind irms_int_number
421 * whether shift applies modulo to value of bits to shift. Asserts
422 * if mode is not irms_int_number.
425 (get_mode_modulo_shift)(const ir_mode *mode) {
426 return _get_mode_modulo_shift(mode);
430 (get_mode_n_vector_elems)(const ir_mode *mode) {
431 return _get_mode_vector_elems(mode);
435 (get_mode_link)(const ir_mode *mode) {
436 return _get_mode_link(mode);
440 (set_mode_link)(ir_mode *mode, void *l) {
441 _set_mode_link(mode, l);
445 get_mode_min(ir_mode *mode) {
447 assert(get_mode_modecode(mode) < (modecode) num_modes);
448 assert(mode_is_data(mode));
454 get_mode_max(ir_mode *mode) {
456 assert(get_mode_modecode(mode) < (modecode) num_modes);
457 assert(mode_is_data(mode));
463 get_mode_null(ir_mode *mode) {
465 assert(get_mode_modecode(mode) < (modecode) num_modes);
466 assert(mode_is_data(mode));
472 get_mode_one(ir_mode *mode) {
474 assert(get_mode_modecode(mode) < (modecode) num_modes);
475 assert(mode_is_data(mode));
481 get_mode_minus_one(ir_mode *mode) {
483 assert(get_mode_modecode(mode) < (modecode) num_modes);
484 assert(mode_is_data(mode));
486 return mode->minus_one;
490 get_mode_infinite(ir_mode *mode) {
492 assert(get_mode_modecode(mode) < (modecode) num_modes);
493 assert(mode_is_float(mode));
495 return get_tarval_plus_inf(mode);
499 get_mode_NAN(ir_mode *mode) {
501 assert(get_mode_modecode(mode) < (modecode) num_modes);
502 assert(mode_is_float(mode));
504 return get_tarval_nan(mode);
508 is_mode(void *thing) {
509 if (get_kind(thing) == k_ir_mode)
516 (mode_is_signed)(const ir_mode *mode) {
517 return _mode_is_signed(mode);
521 (mode_is_float)(const ir_mode *mode) {
522 return _mode_is_float(mode);
526 (mode_is_int)(const ir_mode *mode) {
527 return _mode_is_int(mode);
531 (mode_is_reference)(const ir_mode *mode) {
532 return _mode_is_reference(mode);
536 (mode_is_num)(const ir_mode *mode) {
537 return _mode_is_num(mode);
541 (mode_is_data)(const ir_mode *mode) {
542 return _mode_is_data(mode);
546 (mode_is_datab)(const ir_mode *mode) {
547 return _mode_is_datab(mode);
551 (mode_is_dataM)(const ir_mode *mode) {
552 return _mode_is_dataM(mode);
556 (mode_is_float_vector)(const ir_mode *mode) {
557 return _mode_is_float_vector(mode);
561 (mode_is_int_vector)(const ir_mode *mode) {
562 return _mode_is_int_vector(mode);
565 /* Returns true if sm can be converted to lm without loss. */
567 smaller_mode(const ir_mode *sm, const ir_mode *lm) {
568 int sm_bits, lm_bits;
573 if (sm == lm) return 1;
575 sm_bits = get_mode_size_bits(sm);
576 lm_bits = get_mode_size_bits(lm);
578 switch (get_mode_sort(sm)) {
579 case irms_int_number:
580 switch (get_mode_sort(lm)) {
581 case irms_int_number:
582 /* integers are convertable if
583 * - both have the same sign and lm is the larger one
584 * - lm is the signed one and is at least two bits larger
585 * (one for the sign, one for the highest bit of sm)
586 * - sm & lm are two_complement and lm has greater or equal number of bits
588 if ( get_mode_arithmetic(sm) == get_mode_arithmetic(lm)
589 && get_mode_arithmetic(sm) == irma_twos_complement) {
590 return lm_bits >= sm_bits;
591 } else if (mode_is_signed(sm)) {
592 if ( mode_is_signed(lm) && (lm_bits >= sm_bits) )
594 } else if (mode_is_signed(lm)) {
595 if (lm_bits > sm_bits + 1)
597 } else if (lm_bits >= sm_bits) {
602 case irms_float_number:
603 /* int to float works if the float is large enough */
611 case irms_float_number:
612 if (get_mode_arithmetic(sm) == get_mode_arithmetic(lm)) {
613 if ( (get_mode_sort(lm) == irms_float_number)
614 && (get_mode_size_bits(lm) >= get_mode_size_bits(sm)) )
620 /* do exist machines out there with different pointer lenghts ?*/
623 case irms_internal_boolean:
624 return mode_is_int(lm);
634 /* Return the signed integer equivalent mode for an reference mode. */
635 ir_mode *get_reference_mode_signed_eq(ir_mode *mode) {
636 assert(mode_is_reference(mode));
637 return mode->eq_signed;
640 /* Sets the signed integer equivalent mode for an reference mode. */
641 void set_reference_mode_signed_eq(ir_mode *ref_mode, ir_mode *int_mode) {
642 assert(mode_is_reference(ref_mode));
643 assert(mode_is_int(int_mode));
644 ref_mode->eq_signed = int_mode;
647 /* Return the unsigned integer equivalent mode for an reference mode. */
648 ir_mode *get_reference_mode_unsigned_eq(ir_mode *mode) {
649 assert(mode_is_reference(mode));
650 return mode->eq_unsigned;
653 /* Sets the unsigned integer equivalent mode for an reference mode. */
654 void set_reference_mode_unsigned_eq(ir_mode *ref_mode, ir_mode *int_mode) {
655 assert(mode_is_reference(ref_mode));
656 assert(mode_is_int(int_mode));
657 ref_mode->eq_unsigned = int_mode;
660 /* initialization, build the default modes */
665 obstack_init(&modes);
668 /* initialize predefined modes */
671 newmode.arithmetic = irma_none;
674 newmode.modulo_shift = 0;
675 newmode.vector_elem = 0;
676 newmode.eq_signed = NULL;
677 newmode.eq_unsigned = NULL;
679 newmode.tv_priv = NULL;
681 /* Control Flow Modes*/
682 newmode.sort = irms_control_flow;
685 newmode.name = new_id_from_chars("BB", 2);
686 newmode.code = irm_BB;
688 mode_BB = register_mode(&newmode);
691 newmode.name = new_id_from_chars("X", 1);
692 newmode.code = irm_X;
694 mode_X = register_mode(&newmode);
697 newmode.sort = irms_memory;
700 newmode.name = new_id_from_chars("M", 1);
701 newmode.code = irm_M;
703 mode_M = register_mode(&newmode);
705 /* Auxiliary Modes */
706 newmode.sort = irms_auxiliary,
709 newmode.name = new_id_from_chars("T", 1);
710 newmode.code = irm_T;
712 mode_T = register_mode(&newmode);
715 newmode.name = new_id_from_chars("ANY", 3);
716 newmode.code = irm_ANY;
718 mode_ANY = register_mode(&newmode);
721 newmode.name = new_id_from_chars("BAD", 3);
722 newmode.code = irm_BAD;
724 mode_BAD = register_mode(&newmode);
726 /* Internal Boolean Modes */
727 newmode.sort = irms_internal_boolean;
730 newmode.name = new_id_from_chars("b", 1);
731 newmode.code = irm_b;
733 mode_b = register_mode(&newmode);
736 newmode.vector_elem = 1;
738 /* Float Number Modes */
739 newmode.sort = irms_float_number;
740 newmode.arithmetic = irma_ieee754;
743 newmode.name = new_id_from_chars("F", 1);
744 newmode.code = irm_F;
748 mode_F = register_mode(&newmode);
751 newmode.name = new_id_from_chars("D", 1);
752 newmode.code = irm_D;
756 mode_D = register_mode(&newmode);
759 newmode.name = new_id_from_chars("E", 1);
760 newmode.code = irm_E;
764 mode_E = register_mode(&newmode);
766 /* Integer Number Modes */
767 newmode.sort = irms_int_number;
768 newmode.arithmetic = irma_twos_complement;
771 newmode.name = new_id_from_chars("Bs", 2);
772 newmode.code = irm_Bs;
775 newmode.modulo_shift = 32;
777 mode_Bs = register_mode(&newmode);
780 newmode.name = new_id_from_chars("Bu", 2);
781 newmode.code = irm_Bu;
782 newmode.arithmetic = irma_twos_complement;
785 newmode.modulo_shift = 32;
787 mode_Bu = register_mode(&newmode);
789 /* signed short integer */
790 newmode.name = new_id_from_chars("Hs", 2);
791 newmode.code = irm_Hs;
794 newmode.modulo_shift = 32;
796 mode_Hs = register_mode(&newmode);
798 /* unsigned short integer */
799 newmode.name = new_id_from_chars("Hu", 2);
800 newmode.code = irm_Hu;
803 newmode.modulo_shift = 32;
805 mode_Hu = register_mode(&newmode);
808 newmode.name = new_id_from_chars("Is", 2);
809 newmode.code = irm_Is;
812 newmode.modulo_shift = 32;
814 mode_Is = register_mode(&newmode);
816 /* unsigned integer */
817 newmode.name = new_id_from_chars("Iu", 2);
818 newmode.code = irm_Iu;
821 newmode.modulo_shift = 32;
823 mode_Iu = register_mode(&newmode);
825 /* signed long integer */
826 newmode.name = new_id_from_chars("Ls", 2);
827 newmode.code = irm_Ls;
830 newmode.modulo_shift = 64;
832 mode_Ls = register_mode(&newmode);
834 /* unsigned long integer */
835 newmode.name = new_id_from_chars("Lu", 2);
836 newmode.code = irm_Lu;
839 newmode.modulo_shift = 64;
841 mode_Lu = register_mode(&newmode);
843 /* signed long long integer */
844 newmode.name = new_id_from_chars("LLs", 3);
845 newmode.code = irm_LLs;
848 newmode.modulo_shift = 128;
850 mode_LLs = register_mode(&newmode);
852 /* unsigned long long integer */
853 newmode.name = new_id_from_chars("LLu", 3);
854 newmode.code = irm_LLu;
857 newmode.modulo_shift = 128;
859 mode_LLu = register_mode(&newmode);
862 newmode.sort = irms_reference;
863 newmode.arithmetic = irma_twos_complement;
866 newmode.name = new_id_from_chars("P", 1);
867 newmode.code = irm_P;
870 newmode.modulo_shift = 0;
871 newmode.eq_signed = mode_Is;
872 newmode.eq_unsigned = mode_Iu;
874 mode_P = register_mode(&newmode);
876 /* set the machine specific modes to the predefined ones */
877 mode_P_code = mode_P;
878 mode_P_data = mode_P;
881 /* find a signed mode for an unsigned integer mode */
882 ir_mode *find_unsigned_mode(const ir_mode *mode) {
885 assert(mode->sort == irms_int_number);
887 return find_mode(&n);
890 /* find an unsigned mode for a signed integer mode */
891 ir_mode *find_signed_mode(const ir_mode *mode) {
894 assert(mode->sort == irms_int_number);
896 return find_mode(&n);
899 /* finds a integer mode with 2*n bits for an integer mode with n bits. */
900 ir_mode *find_double_bits_int_mode(const ir_mode *mode) {
903 assert(mode->sort == irms_int_number && mode->arithmetic == irma_twos_complement);
905 n.size = 2*mode->size;
906 return find_mode(&n);
910 * Returns non-zero if the given mode honors signed zero's, i.e.,
911 * a +0 and a -0 exists and handled differently.
913 int mode_honor_signed_zeros(const ir_mode *mode) {
914 /* for floating point, we know that IEEE 754 has +0 and -0,
915 * but always handles it identical.
918 mode->sort == irms_float_number &&
919 mode->arithmetic != irma_ieee754;
923 * Returns non-zero if the given mode might overflow on unary Minus.
925 * This does NOT happen on IEEE 754.
927 int mode_overflow_on_unary_Minus(const ir_mode *mode) {
928 if (mode->sort == irms_float_number)
929 return mode->arithmetic == irma_ieee754 ? 0 : 1;
934 * Returns non-zero if the mode has a reversed wrap-around
935 * logic, especially (a + x) - x == a.
937 * This is normally true for integer modes, not for floating
940 int mode_wrap_around(const ir_mode *mode) {
941 /* FIXME: better would be an extra mode property */
942 return mode_is_int(mode);
945 void finish_mode(void) {
946 obstack_free(&modes, 0);