3 * File name: ir/ir/irmode.c
4 * Purpose: Data modes of operations.
5 * Author: Martin Trapp, Christian Schaefer
6 * Modified by: Goetz Lindenmaier, Mathias Heil
9 * Copyright: (c) 1998-2003 Universität Karlsruhe
10 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
25 # include "irmode_t.h"
31 static long long count = 0;
32 # define ANNOUNCE() printf(__FILE__": call no. %lld (%s)\n", count++, __FUNCTION__)
34 # define ANNOUNCE() ((void)0)
42 /** dynamic array to hold all modes */
43 static struct obstack modes;
45 /** number of defined modes */
53 * Compare modes that don't need to have their code field
56 * TODO: Add other fields
58 INLINE static int modes_are_equal(const ir_mode *m, const ir_mode *n)
61 if (m->sort == n->sort &&
62 m->arithmetic == n->arithmetic &&
65 m->modulo_shift == n->modulo_shift &&
66 m->vector_elem == n->vector_elem)
73 * calculates the next obstack address
75 static void *next_obstack_adr(struct obstack *o, void *p, size_t s)
77 PTR_INT_TYPE adr = __PTR_TO_INT((char *)p);
78 int mask = obstack_alignment_mask(o);
82 return __INT_TO_PTR(adr & ~mask);
86 * searches the modes obstack for the given mode and returns
87 * a pointer on an equal mode already in the array, NULL if
90 static ir_mode *find_mode(const ir_mode *m)
93 struct _obstack_chunk *p;
96 n = (ir_mode *)p->contents;
97 nn = next_obstack_adr(&modes, n, sizeof(*n));
98 for (; (char *)nn <= modes.next_free;) {
100 if (modes_are_equal(n, m))
104 nn = next_obstack_adr(&modes, n, sizeof(*n));
107 for (p = p->prev; p; p = p->prev) {
108 n = (ir_mode *)p->contents;
109 nn = next_obstack_adr(&modes, n, sizeof(*n));
110 for (; (char *)nn < p->limit;) {
112 if (modes_are_equal(n, m))
116 nn = next_obstack_adr(&modes, n, sizeof(*n));
124 * sets special values of modes
126 static void set_mode_values(ir_mode* mode)
128 switch (get_mode_sort(mode))
131 case irms_int_number:
132 case irms_float_number:
133 mode->min = get_tarval_min(mode);
134 mode->max = get_tarval_max(mode);
135 mode->null = get_tarval_null(mode);
136 mode->one = get_tarval_one(mode);
139 case irms_internal_boolean:
140 mode->min = tarval_b_false;
141 mode->max = tarval_b_true;
142 mode->null = tarval_b_false;
143 mode->one = tarval_b_true;
147 mode->min = tarval_bad;
148 mode->max = tarval_bad;
149 mode->null = (get_mode_modecode(mode) == irm_P) ? tarval_P_void : tarval_bad;
150 mode->one = tarval_bad;
155 case irms_control_flow:
156 mode->min = tarval_bad;
157 mode->max = tarval_bad;
158 mode->null = tarval_bad;
159 mode->one = tarval_bad;
165 * globals defined in irmode.h
168 /* --- Predefined modes --- */
170 /* FIRM internal modes: */
178 /* predefined numerical modes: */
179 ir_mode *mode_F; /* float */
180 ir_mode *mode_D; /* double */
181 ir_mode *mode_E; /* long double */
183 ir_mode *mode_Bs; /* integral values, signed and unsigned */
184 ir_mode *mode_Bu; /* 8 bit */
185 ir_mode *mode_Hs; /* 16 bit */
187 ir_mode *mode_Is; /* 32 bit */
189 ir_mode *mode_Ls; /* 64 bit */
197 /* machine specific modes */
198 ir_mode *mode_P_mach; /* machine specific pointer mode */
201 * functions defined in irmode.h
204 /* JNI access functions */
205 INLINE ir_mode *get_modeT(void) { ANNOUNCE(); return mode_T; }
206 INLINE ir_mode *get_modeF(void) { ANNOUNCE(); return mode_F; }
207 INLINE ir_mode *get_modeD(void) { ANNOUNCE(); return mode_D; }
208 INLINE ir_mode *get_modeE(void) { ANNOUNCE(); return mode_E; }
209 INLINE ir_mode *get_modeBs(void) { ANNOUNCE(); return mode_Bs; }
210 INLINE ir_mode *get_modeBu(void) { ANNOUNCE(); return mode_Bu; }
211 INLINE ir_mode *get_modeHs(void) { ANNOUNCE(); return mode_Hs; }
212 INLINE ir_mode *get_modeHu(void) { ANNOUNCE(); return mode_Hu; }
213 INLINE ir_mode *get_modeIs(void) { ANNOUNCE(); return mode_Is; }
214 INLINE ir_mode *get_modeIu(void) { ANNOUNCE(); return mode_Iu; }
215 INLINE ir_mode *get_modeLs(void) { ANNOUNCE(); return mode_Ls; }
216 INLINE ir_mode *get_modeLu(void) { ANNOUNCE(); return mode_Lu; }
217 INLINE ir_mode *get_modeC(void) { ANNOUNCE(); return mode_C; }
218 INLINE ir_mode *get_modeU(void) { ANNOUNCE(); return mode_U; }
219 INLINE ir_mode *get_modeb(void) { ANNOUNCE(); return mode_b; }
220 INLINE ir_mode *get_modeP(void) { ANNOUNCE(); return mode_P; }
221 INLINE ir_mode *get_modeX(void) { ANNOUNCE(); return mode_X; }
222 INLINE ir_mode *get_modeM(void) { ANNOUNCE(); return mode_M; }
223 INLINE ir_mode *get_modeBB(void) { ANNOUNCE(); return mode_BB; }
224 INLINE ir_mode *get_modeANY(void) { ANNOUNCE(); return mode_ANY; }
225 INLINE ir_mode *get_modeBAD(void) { ANNOUNCE(); return mode_BAD; }
228 ir_mode *(get_modeP_mach)(void) {
230 return __get_modeP_mach();
233 void (set_modeP_mach)(ir_mode *p) {
239 * Registers a new mode.
241 * @param new_mode The new mode template.
243 static ir_mode *register_mode(const ir_mode* new_mode)
245 ir_mode *mode = NULL;
250 /* copy mode struct to modes array */
251 mode = (ir_mode*)obstack_copy(&modes, new_mode, sizeof(ir_mode));
253 mode->kind = k_ir_mode;
254 if (num_modes >= irm_max) mode->code = num_modes;
257 set_mode_values(mode);
263 * Creates a new mode.
265 ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign,
266 mode_arithmetic arithmetic, unsigned int modulo_shift )
271 mode_tmpl.name = new_id_from_str(name);
272 mode_tmpl.sort = sort;
273 mode_tmpl.size = bit_size;
274 mode_tmpl.sign = sign ? 1 : 0;
275 mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
276 mode_tmpl.vector_elem = 1;
277 mode_tmpl.arithmetic = arithmetic;
278 mode_tmpl.link = NULL;
279 mode_tmpl.tv_priv = NULL;
281 mode = find_mode(&mode_tmpl);
291 case irms_control_flow:
293 case irms_internal_boolean:
294 assert(0 && "internal modes cannot be user defined");
297 case irms_float_number:
298 case irms_int_number:
301 return register_mode(&mode_tmpl);
303 return NULL; /* to shut up gcc */
307 * Creates a new vector mode.
309 ir_mode *new_ir_vector_mode(const char *name, mode_sort sort, int bit_size, unsigned num_of_elem, int sign,
310 mode_arithmetic arithmetic, unsigned int modulo_shift )
315 mode_tmpl.name = new_id_from_str(name);
316 mode_tmpl.sort = sort;
317 mode_tmpl.size = bit_size * num_of_elem;
318 mode_tmpl.sign = sign ? 1 : 0;
319 mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
320 mode_tmpl.vector_elem = num_of_elem;
321 mode_tmpl.arithmetic = arithmetic;
322 mode_tmpl.link = NULL;
323 mode_tmpl.tv_priv = NULL;
325 mode = find_mode(&mode_tmpl);
329 if (num_of_elem <= 1) {
330 assert(0 && "vector modes should have at least 2 elements");
338 case irms_control_flow:
340 case irms_internal_boolean:
341 assert(0 && "internal modes cannot be user defined");
346 assert(0 && "only integer and floating point modes can be vectorized");
349 case irms_float_number:
350 assert(0 && "not yet implemented");
353 case irms_int_number:
354 return register_mode(&mode_tmpl);
356 return NULL; /* to shut up gcc */
359 /* Functions for the direct access to all attributes od a ir_mode */
361 (get_mode_modecode)(const ir_mode *mode)
364 return __get_mode_modecode(mode);
368 (get_mode_ident)(const ir_mode *mode)
371 return __get_mode_ident(mode);
375 get_mode_name(const ir_mode *mode)
378 return get_id_str(mode->name);
382 (get_mode_sort)(const ir_mode* mode)
385 return __get_mode_sort(mode);
389 (get_mode_size_bits)(const ir_mode *mode)
392 return __get_mode_size_bits(mode);
396 (get_mode_size_bytes)(const ir_mode *mode) {
398 return __get_mode_size_bytes(mode);
402 (get_mode_sign)(const ir_mode *mode)
405 return __get_mode_sign(mode);
409 (get_mode_arithmetic)(const ir_mode *mode)
412 return get_mode_arithmetic(mode);
416 /* Attribute modulo shift specifies for modes of kind irms_int_number
417 * whether shift applies modulo to value of bits to shift. Asserts
418 * if mode is not irms_int_number.
421 (get_mode_modulo_shift)(const ir_mode *mode) {
422 return __get_mode_modulo_shift(mode);
426 (get_mode_n_vector_elems)(const ir_mode *mode) {
427 return __get_mode_vector_elems(mode);
431 (get_mode_link)(const ir_mode *mode)
434 return __get_mode_link(mode);
438 (set_mode_link)(ir_mode *mode, void *l)
440 __set_mode_link(mode, l);
444 get_mode_min (ir_mode *mode)
448 assert(get_mode_modecode(mode) < num_modes);
449 assert(mode_is_data(mode));
455 get_mode_max (ir_mode *mode)
459 assert(get_mode_modecode(mode) < num_modes);
460 assert(mode_is_data(mode));
466 get_mode_null (ir_mode *mode)
470 assert(get_mode_modecode(mode) < num_modes);
471 assert(mode_is_data(mode));
477 get_mode_one (ir_mode *mode)
481 assert(get_mode_modecode(mode) < num_modes);
482 assert(mode_is_data(mode));
488 get_mode_infinite(ir_mode *mode)
492 assert(get_mode_modecode(mode) < num_modes);
493 assert(mode_is_float(mode));
495 return get_tarval_inf(mode);
499 get_mode_NAN(ir_mode *mode)
503 assert(get_mode_modecode(mode) < num_modes);
504 assert(mode_is_float(mode));
506 return get_tarval_nan(mode);
510 is_mode (void *thing) {
511 if (get_kind(thing) == k_ir_mode)
518 (mode_is_signed)(const ir_mode *mode) {
520 return __mode_is_signed(mode);
524 (mode_is_float)(const ir_mode *mode) {
526 return __mode_is_float(mode);
530 (mode_is_int)(const ir_mode *mode) {
532 return __mode_is_int(mode);
536 (mode_is_character)(const ir_mode *mode) {
538 return __mode_is_character(mode);
542 (mode_is_reference)(const ir_mode *mode) {
544 return __mode_is_reference(mode);
548 (mode_is_num)(const ir_mode *mode) {
550 return __mode_is_num(mode);
554 (mode_is_numP)(const ir_mode *mode) {
556 return __mode_is_numP(mode);
560 (mode_is_data)(const ir_mode *mode) {
562 return __mode_is_data(mode);
566 (mode_is_datab)(const ir_mode *mode) {
568 return __mode_is_datab(mode);
572 (mode_is_dataM)(const ir_mode *mode) {
574 return __mode_is_dataM(mode);
578 (mode_is_float_vector)(const ir_mode *mode) {
580 return __mode_is_float_vector(mode);
584 (mode_is_int_vector)(const ir_mode *mode) {
586 return __mode_is_int_vector(mode);
589 /* Returns true if sm can be converted to lm without loss. */
591 smaller_mode(const ir_mode *sm, const ir_mode *lm)
593 int sm_bits, lm_bits;
599 if (sm == lm) return 1;
601 sm_bits = get_mode_size_bits(sm);
602 lm_bits = get_mode_size_bits(lm);
604 switch(get_mode_sort(sm))
606 case irms_int_number:
607 switch(get_mode_sort(lm))
609 case irms_int_number:
610 /* integers are convertable if
611 * - both have the same sign and lm is the larger one
612 * - lm is the signed one and is at least two bits larger
613 * (one for the sign, one for the highest bit of sm)
614 * - sm & lm are two_complement and lm has greater or equal number of bits
616 if ( get_mode_arithmetic(sm) == get_mode_arithmetic(lm)
617 && get_mode_arithmetic(sm) == irma_twos_complement) {
618 return lm_bits >= sm_bits;
620 else if (mode_is_signed(sm))
622 if ( mode_is_signed(lm) && (lm_bits >= sm_bits) )
625 else if (mode_is_signed(lm))
627 if (lm_bits > sm_bits + 1)
630 else if (lm_bits >= sm_bits)
636 case irms_float_number:
637 /* int to float works if the float is large enough */
645 case irms_float_number:
646 if (get_mode_arithmetic(sm) == get_mode_arithmetic(lm)) {
647 if ( (get_mode_sort(lm) == irms_float_number)
648 && (get_mode_size_bits(lm) >= get_mode_size_bits(sm)) )
654 /* do exist machines out there with different pointer lenghts ?*/
665 /* initialization, build the default modes */
671 /* init flexible array */
673 obstack_init(&modes);
676 /* initialize predefined modes */
679 newmode.arithmetic = irma_none;
682 newmode.modulo_shift = 0;
683 newmode.vector_elem = 0;
685 newmode.tv_priv = NULL;
687 /* Control Flow Modes*/
688 newmode.sort = irms_control_flow;
691 newmode.name = new_id_from_chars("BB", 2);
692 newmode.code = irm_BB;
694 mode_BB = register_mode(&newmode);
697 newmode.name = new_id_from_chars("X", 1);
698 newmode.code = irm_X;
700 mode_X = register_mode(&newmode);
703 newmode.sort = irms_memory;
706 newmode.name = new_id_from_chars("M", 1);
707 newmode.code = irm_M;
709 mode_M = register_mode(&newmode);
711 /* Auxiliary Modes */
712 newmode.sort = irms_auxiliary,
715 newmode.name = new_id_from_chars("T", 1);
716 newmode.code = irm_T;
718 mode_T = register_mode(&newmode);
721 newmode.name = new_id_from_chars("ANY", 3);
722 newmode.code = irm_ANY;
724 mode_ANY = register_mode(&newmode);
727 newmode.name = new_id_from_chars("BAD", 3);
728 newmode.code = irm_BAD;
730 mode_BAD = register_mode(&newmode);
732 /* Internal Boolean Modes */
733 newmode.sort = irms_internal_boolean;
736 newmode.name = new_id_from_chars("b", 1);
737 newmode.code = irm_b;
739 mode_b = register_mode(&newmode);
742 newmode.vector_elem = 1;
744 /* Float Number Modes */
745 newmode.sort = irms_float_number;
746 newmode.arithmetic = irma_ieee754;
749 newmode.name = new_id_from_chars("F", 1);
750 newmode.code = irm_F;
754 mode_F = register_mode(&newmode);
757 newmode.name = new_id_from_chars("D", 1);
758 newmode.code = irm_D;
762 mode_D = register_mode(&newmode);
765 newmode.name = new_id_from_chars("E", 1);
766 newmode.code = irm_E;
770 mode_E = register_mode(&newmode);
772 /* Integer Number Modes */
773 newmode.sort = irms_int_number;
774 newmode.arithmetic = irma_twos_complement;
777 newmode.name = new_id_from_chars("Bs", 2);
778 newmode.code = irm_Bs;
781 newmode.modulo_shift = 32;
783 mode_Bs = register_mode(&newmode);
786 newmode.name = new_id_from_chars("Bu", 2);
787 newmode.code = irm_Bu;
788 newmode.arithmetic = irma_twos_complement;
791 newmode.modulo_shift = 32;
793 mode_Bu = register_mode(&newmode);
795 /* signed short integer */
796 newmode.name = new_id_from_chars("Hs", 2);
797 newmode.code = irm_Hs;
800 newmode.modulo_shift = 32;
802 mode_Hs = register_mode(&newmode);
804 /* unsigned short integer */
805 newmode.name = new_id_from_chars("Hu", 2);
806 newmode.code = irm_Hu;
809 newmode.modulo_shift = 32;
811 mode_Hu = register_mode(&newmode);
814 newmode.name = new_id_from_chars("Is", 2);
815 newmode.code = irm_Is;
818 newmode.modulo_shift = 32;
820 mode_Is = register_mode(&newmode);
822 /* unsigned integer */
823 newmode.name = new_id_from_chars("Iu", 2);
824 newmode.code = irm_Iu;
827 newmode.modulo_shift = 32;
829 mode_Iu = register_mode(&newmode);
831 /* signed long integer */
832 newmode.name = new_id_from_chars("Ls", 2);
833 newmode.code = irm_Ls;
836 newmode.modulo_shift = 64;
838 mode_Ls = register_mode(&newmode);
840 /* unsigned long integer */
841 newmode.name = new_id_from_chars("Lu", 2);
842 newmode.code = irm_Lu;
845 newmode.modulo_shift = 64;
847 mode_Lu = register_mode(&newmode);
849 /* Character Modes */
850 newmode.sort = irms_character;
851 newmode.arithmetic = irma_none;
854 newmode.name = new_id_from_chars("C", 1);
855 newmode.code = irm_C;
858 newmode.modulo_shift = 32;
860 mode_C = register_mode(&newmode);
862 /* Unicode character */
863 newmode.name = new_id_from_chars("U", 1);
864 newmode.code = irm_U;
867 newmode.modulo_shift = 32;
869 mode_U = register_mode(&newmode);
871 /* Reference Modes */
872 newmode.sort = irms_reference;
873 newmode.arithmetic = irma_twos_complement;
876 newmode.name = new_id_from_chars("P", 1);
877 newmode.code = irm_P;
880 newmode.modulo_shift = 0;
882 mode_P = register_mode(&newmode);
884 /* set the machine specific modes to the predifined ones */
885 mode_P_mach = mode_P;
888 /* find a signed mode for an unsigned integer mode */
889 ir_mode *find_unsigned_mode(const ir_mode *mode) {
892 if (mode->sort != irms_int_number);
894 return find_mode(&n);
897 /* find an unsigned mode for a signed integer mode */
898 ir_mode *find_signed_mode(const ir_mode *mode) {
901 assert(mode->sort == irms_int_number);
903 return find_mode(&n);
906 /* finds a integer mode with 2*n bits for an integer mode with n bits. */
907 ir_mode *find_double_bits_int_mode(const ir_mode *mode) {
910 assert(mode->sort == irms_int_number && mode->arithmetic == irma_twos_complement);
912 n.size = 2*mode->size;
913 return find_mode(&n);
916 void finish_mode(void) {
917 obstack_free(&modes, 0);