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.
23 # include "irmode_t.h"
29 static long long count = 0;
30 # define ANNOUNCE() printf(__FILE__": call no. %lld (%s)\n", count++, __FUNCTION__)
32 # define ANNOUNCE() ((void)0)
40 /** dynamic array to hold all modes */
41 static struct obstack modes;
43 /** number of defined modes */
51 * Compare modes that don't need to have their code field
54 * TODO: Add other fields
56 INLINE static int modes_are_equal(const ir_mode *m, const ir_mode *n)
59 if (m->sort == n->sort &&
60 m->arithmetic == n->arithmetic &&
63 m->modulo_shift == n->modulo_shift &&
64 m->vector_elem == n->vector_elem)
71 * calculates the next obstack address
73 static void *next_obstack_adr(struct obstack *o, void *p, size_t s)
75 PTR_INT_TYPE adr = __PTR_TO_INT((char *)p);
76 int mask = obstack_alignment_mask(o);
80 return __INT_TO_PTR(adr & ~mask);
84 * searches the modes obstack for the given mode and returns
85 * a pointer on an equal mode already in the array, NULL if
88 static ir_mode *find_mode(const ir_mode *m)
91 struct _obstack_chunk *p;
94 n = (ir_mode *)p->contents;
95 nn = next_obstack_adr(&modes, n, sizeof(*n));
96 for (; (char *)nn <= modes.next_free;) {
98 if (modes_are_equal(n, m))
102 nn = next_obstack_adr(&modes, n, sizeof(*n));
105 for (p = p->prev; p; p = p->prev) {
106 n = (ir_mode *)p->contents;
107 nn = next_obstack_adr(&modes, n, sizeof(*n));
108 for (; (char *)nn < p->limit;) {
110 if (modes_are_equal(n, m))
114 nn = next_obstack_adr(&modes, n, sizeof(*n));
122 * sets special values of modes
124 static void set_mode_values(ir_mode* mode)
126 switch (get_mode_sort(mode))
129 case irms_int_number:
130 case irms_float_number:
131 mode->min = get_tarval_min(mode);
132 mode->max = get_tarval_max(mode);
133 mode->null = get_tarval_null(mode);
134 mode->one = get_tarval_one(mode);
137 case irms_internal_boolean:
138 mode->min = tarval_b_false;
139 mode->max = tarval_b_true;
140 mode->null = tarval_b_false;
141 mode->one = tarval_b_true;
145 mode->min = tarval_bad;
146 mode->max = tarval_bad;
147 mode->null = (get_mode_modecode(mode) == irm_P) ? tarval_P_void : tarval_bad;
148 mode->one = tarval_bad;
153 case irms_control_flow:
154 mode->min = tarval_bad;
155 mode->max = tarval_bad;
156 mode->null = tarval_bad;
157 mode->one = tarval_bad;
163 * globals defined in irmode.h
166 /* --- Predefined modes --- */
168 /* FIRM internal modes: */
176 /* predefined numerical modes: */
177 ir_mode *mode_F; /* float */
178 ir_mode *mode_D; /* double */
179 ir_mode *mode_E; /* long double */
181 ir_mode *mode_Bs; /* integral values, signed and unsigned */
182 ir_mode *mode_Bu; /* 8 bit */
183 ir_mode *mode_Hs; /* 16 bit */
185 ir_mode *mode_Is; /* 32 bit */
187 ir_mode *mode_Ls; /* 64 bit */
195 /* machine specific modes */
196 ir_mode *mode_P_mach; /* machine specific pointer mode */
199 * functions defined in irmode.h
202 /* JNI access functions */
203 INLINE ir_mode *get_modeT(void) { ANNOUNCE(); return mode_T; }
204 INLINE ir_mode *get_modeF(void) { ANNOUNCE(); return mode_F; }
205 INLINE ir_mode *get_modeD(void) { ANNOUNCE(); return mode_D; }
206 INLINE ir_mode *get_modeE(void) { ANNOUNCE(); return mode_E; }
207 INLINE ir_mode *get_modeBs(void) { ANNOUNCE(); return mode_Bs; }
208 INLINE ir_mode *get_modeBu(void) { ANNOUNCE(); return mode_Bu; }
209 INLINE ir_mode *get_modeHs(void) { ANNOUNCE(); return mode_Hs; }
210 INLINE ir_mode *get_modeHu(void) { ANNOUNCE(); return mode_Hu; }
211 INLINE ir_mode *get_modeIs(void) { ANNOUNCE(); return mode_Is; }
212 INLINE ir_mode *get_modeIu(void) { ANNOUNCE(); return mode_Iu; }
213 INLINE ir_mode *get_modeLs(void) { ANNOUNCE(); return mode_Ls; }
214 INLINE ir_mode *get_modeLu(void) { ANNOUNCE(); return mode_Lu; }
215 INLINE ir_mode *get_modeC(void) { ANNOUNCE(); return mode_C; }
216 INLINE ir_mode *get_modeU(void) { ANNOUNCE(); return mode_U; }
217 INLINE ir_mode *get_modeb(void) { ANNOUNCE(); return mode_b; }
218 INLINE ir_mode *get_modeP(void) { ANNOUNCE(); return mode_P; }
219 INLINE ir_mode *get_modeX(void) { ANNOUNCE(); return mode_X; }
220 INLINE ir_mode *get_modeM(void) { ANNOUNCE(); return mode_M; }
221 INLINE ir_mode *get_modeBB(void) { ANNOUNCE(); return mode_BB; }
222 INLINE ir_mode *get_modeANY(void) { ANNOUNCE(); return mode_ANY; }
223 INLINE ir_mode *get_modeBAD(void) { ANNOUNCE(); return mode_BAD; }
226 ir_mode *(get_modeP_mach)(void) {
228 return __get_modeP_mach();
231 void (set_modeP_mach)(ir_mode *p) {
237 * Registers a new mode.
239 * @param new_mode The new mode template.
241 static ir_mode *register_mode(const ir_mode* new_mode)
243 ir_mode *mode = NULL;
248 /* copy mode struct to modes array */
249 mode = (ir_mode*)obstack_copy(&modes, new_mode, sizeof(ir_mode));
251 mode->kind = k_ir_mode;
252 if (num_modes >= irm_max) mode->code = num_modes;
255 set_mode_values(mode);
261 * Creates a new mode.
263 ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int sign,
264 mode_arithmetic arithmetic, unsigned int modulo_shift )
269 mode_tmpl.name = new_id_from_str(name);
270 mode_tmpl.sort = sort;
271 mode_tmpl.size = bit_size;
272 mode_tmpl.sign = sign ? 1 : 0;
273 mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
274 mode_tmpl.vector_elem = 1;
275 mode_tmpl.arithmetic = arithmetic;
276 mode_tmpl.link = NULL;
277 mode_tmpl.tv_priv = NULL;
279 mode = find_mode(&mode_tmpl);
289 case irms_control_flow:
291 case irms_internal_boolean:
292 assert(0 && "internal modes cannot be user defined");
295 case irms_float_number:
296 case irms_int_number:
299 return register_mode(&mode_tmpl);
301 return NULL; /* to shut up gcc */
305 * Creates a new vector mode.
307 ir_mode *new_ir_vector_mode(const char *name, mode_sort sort, int bit_size, unsigned num_of_elem, int sign,
308 mode_arithmetic arithmetic, unsigned int modulo_shift )
313 mode_tmpl.name = new_id_from_str(name);
314 mode_tmpl.sort = sort;
315 mode_tmpl.size = bit_size * num_of_elem;
316 mode_tmpl.sign = sign ? 1 : 0;
317 mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
318 mode_tmpl.vector_elem = num_of_elem;
319 mode_tmpl.arithmetic = arithmetic;
320 mode_tmpl.link = NULL;
321 mode_tmpl.tv_priv = NULL;
323 mode = find_mode(&mode_tmpl);
327 if (num_of_elem <= 1) {
328 assert(0 && "vector modes should have at least 2 elements");
336 case irms_control_flow:
338 case irms_internal_boolean:
339 assert(0 && "internal modes cannot be user defined");
344 assert(0 && "only integer and floating point modes can be vectorized");
347 case irms_float_number:
348 assert(0 && "not yet implemented");
351 case irms_int_number:
352 return register_mode(&mode_tmpl);
354 return NULL; /* to shut up gcc */
357 /* Functions for the direct access to all attributes od a ir_mode */
359 (get_mode_modecode)(const ir_mode *mode)
362 return __get_mode_modecode(mode);
366 (get_mode_ident)(const ir_mode *mode)
369 return __get_mode_ident(mode);
373 get_mode_name(const ir_mode *mode)
376 return get_id_str(mode->name);
380 (get_mode_sort)(const ir_mode* mode)
383 return __get_mode_sort(mode);
387 (get_mode_size_bits)(const ir_mode *mode)
390 return __get_mode_size_bits(mode);
394 (get_mode_size_bytes)(const ir_mode *mode) {
396 return __get_mode_size_bytes(mode);
400 (get_mode_sign)(const ir_mode *mode)
403 return __get_mode_sign(mode);
407 (get_mode_arithmetic)(const ir_mode *mode)
410 return get_mode_arithmetic(mode);
414 /* Attribute modulo shift specifies for modes of kind irms_int_number
415 * whether shift applies modulo to value of bits to shift. Asserts
416 * if mode is not irms_int_number.
419 (get_mode_modulo_shift)(const ir_mode *mode) {
420 return __get_mode_modulo_shift(mode);
424 (get_mode_n_vector_elems)(const ir_mode *mode) {
425 return __get_mode_vector_elems(mode);
429 (get_mode_link)(const ir_mode *mode)
432 return __get_mode_link(mode);
436 (set_mode_link)(ir_mode *mode, void *l)
438 __set_mode_link(mode, l);
442 get_mode_min (ir_mode *mode)
446 assert(get_mode_modecode(mode) < num_modes);
447 assert(mode_is_data(mode));
453 get_mode_max (ir_mode *mode)
457 assert(get_mode_modecode(mode) < num_modes);
458 assert(mode_is_data(mode));
464 get_mode_null (ir_mode *mode)
468 assert(get_mode_modecode(mode) < num_modes);
469 assert(mode_is_data(mode));
475 get_mode_one (ir_mode *mode)
479 assert(get_mode_modecode(mode) < num_modes);
480 assert(mode_is_data(mode));
486 get_mode_infinite(ir_mode *mode)
490 assert(get_mode_modecode(mode) < num_modes);
491 assert(mode_is_float(mode));
493 return get_tarval_inf(mode);
497 get_mode_NAN(ir_mode *mode)
501 assert(get_mode_modecode(mode) < 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) {
518 return __mode_is_signed(mode);
522 (mode_is_float)(const ir_mode *mode) {
524 return __mode_is_float(mode);
528 (mode_is_int)(const ir_mode *mode) {
530 return __mode_is_int(mode);
534 (mode_is_character)(const ir_mode *mode) {
536 return __mode_is_character(mode);
540 (mode_is_reference)(const ir_mode *mode) {
542 return __mode_is_reference(mode);
546 (mode_is_num)(const ir_mode *mode) {
548 return __mode_is_num(mode);
552 (mode_is_numP)(const ir_mode *mode) {
554 return __mode_is_numP(mode);
558 (mode_is_data)(const ir_mode *mode) {
560 return __mode_is_data(mode);
564 (mode_is_datab)(const ir_mode *mode) {
566 return __mode_is_datab(mode);
570 (mode_is_dataM)(const ir_mode *mode) {
572 return __mode_is_dataM(mode);
576 (mode_is_float_vector)(const ir_mode *mode) {
578 return __mode_is_float_vector(mode);
582 (mode_is_int_vector)(const ir_mode *mode) {
584 return __mode_is_int_vector(mode);
587 /* Returns true if sm can be converted to lm without loss. */
589 smaller_mode(const ir_mode *sm, const ir_mode *lm)
591 int sm_bits, lm_bits;
597 if (sm == lm) return 1;
599 sm_bits = get_mode_size_bits(sm);
600 lm_bits = get_mode_size_bits(lm);
602 switch(get_mode_sort(sm))
604 case irms_int_number:
605 switch(get_mode_sort(lm))
607 case irms_int_number:
608 /* integers are convertable if
609 * - both have the same sign and lm is the larger one
610 * - lm is the signed one and is at least two bits larger
611 * (one for the sign, one for the highest bit of sm)
612 * - sm & lm are two_complement and lm has greater or equal number of bits
614 if ( get_mode_arithmetic(sm) == get_mode_arithmetic(lm)
615 && get_mode_arithmetic(sm) == irma_twos_complement) {
616 return lm_bits >= sm_bits;
618 else if (mode_is_signed(sm))
620 if ( mode_is_signed(lm) && (lm_bits >= sm_bits) )
623 else if (mode_is_signed(lm))
625 if (lm_bits > sm_bits + 1)
628 else if (lm_bits >= sm_bits)
634 case irms_float_number:
635 /* int to float works if the float is large enough */
643 case irms_float_number:
644 if (get_mode_arithmetic(sm) == get_mode_arithmetic(lm)) {
645 if ( (get_mode_sort(lm) == irms_float_number)
646 && (get_mode_size_bits(lm) >= get_mode_size_bits(sm)) )
652 /* do exist machines out there with different pointer lenghts ?*/
663 /* initialization, build the default modes */
669 /* init flexible array */
671 obstack_init(&modes);
674 /* initialize predefined modes */
677 newmode.arithmetic = irma_none;
680 newmode.modulo_shift = 0;
681 newmode.vector_elem = 0;
683 newmode.tv_priv = NULL;
685 /* Control Flow Modes*/
686 newmode.sort = irms_control_flow;
689 newmode.name = new_id_from_chars("BB", 2);
690 newmode.code = irm_BB;
692 mode_BB = register_mode(&newmode);
695 newmode.name = new_id_from_chars("X", 1);
696 newmode.code = irm_X;
698 mode_X = register_mode(&newmode);
701 newmode.sort = irms_memory;
704 newmode.name = new_id_from_chars("M", 1);
705 newmode.code = irm_M;
707 mode_M = register_mode(&newmode);
709 /* Auxiliary Modes */
710 newmode.sort = irms_auxiliary,
713 newmode.name = new_id_from_chars("T", 1);
714 newmode.code = irm_T;
716 mode_T = register_mode(&newmode);
719 newmode.name = new_id_from_chars("ANY", 3);
720 newmode.code = irm_ANY;
722 mode_ANY = register_mode(&newmode);
725 newmode.name = new_id_from_chars("BAD", 3);
726 newmode.code = irm_BAD;
728 mode_BAD = register_mode(&newmode);
730 /* Internal Boolean Modes */
731 newmode.sort = irms_internal_boolean;
734 newmode.name = new_id_from_chars("b", 1);
735 newmode.code = irm_b;
737 mode_b = register_mode(&newmode);
740 newmode.vector_elem = 1;
742 /* Float Number Modes */
743 newmode.sort = irms_float_number;
744 newmode.arithmetic = irma_ieee754;
747 newmode.name = new_id_from_chars("F", 1);
748 newmode.code = irm_F;
752 mode_F = register_mode(&newmode);
755 newmode.name = new_id_from_chars("D", 1);
756 newmode.code = irm_D;
760 mode_D = register_mode(&newmode);
763 newmode.name = new_id_from_chars("E", 1);
764 newmode.code = irm_E;
768 mode_E = register_mode(&newmode);
770 /* Integer Number Modes */
771 newmode.sort = irms_int_number;
772 newmode.arithmetic = irma_twos_complement;
775 newmode.name = new_id_from_chars("Bs", 2);
776 newmode.code = irm_Bs;
779 newmode.modulo_shift = 32;
781 mode_Bs = register_mode(&newmode);
784 newmode.name = new_id_from_chars("Bu", 2);
785 newmode.code = irm_Bu;
786 newmode.arithmetic = irma_twos_complement;
789 newmode.modulo_shift = 32;
791 mode_Bu = register_mode(&newmode);
793 /* signed short integer */
794 newmode.name = new_id_from_chars("Hs", 2);
795 newmode.code = irm_Hs;
798 newmode.modulo_shift = 32;
800 mode_Hs = register_mode(&newmode);
802 /* unsigned short integer */
803 newmode.name = new_id_from_chars("Hu", 2);
804 newmode.code = irm_Hu;
807 newmode.modulo_shift = 32;
809 mode_Hu = register_mode(&newmode);
812 newmode.name = new_id_from_chars("Is", 2);
813 newmode.code = irm_Is;
816 newmode.modulo_shift = 32;
818 mode_Is = register_mode(&newmode);
820 /* unsigned integer */
821 newmode.name = new_id_from_chars("Iu", 2);
822 newmode.code = irm_Iu;
825 newmode.modulo_shift = 32;
827 mode_Iu = register_mode(&newmode);
829 /* signed long integer */
830 newmode.name = new_id_from_chars("Ls", 2);
831 newmode.code = irm_Ls;
834 newmode.modulo_shift = 64;
836 mode_Ls = register_mode(&newmode);
838 /* unsigned long integer */
839 newmode.name = new_id_from_chars("Lu", 2);
840 newmode.code = irm_Lu;
843 newmode.modulo_shift = 64;
845 mode_Lu = register_mode(&newmode);
847 /* Character Modes */
848 newmode.sort = irms_character;
849 newmode.arithmetic = irma_none;
852 newmode.name = new_id_from_chars("C", 1);
853 newmode.code = irm_C;
856 newmode.modulo_shift = 32;
858 mode_C = register_mode(&newmode);
860 /* Unicode character */
861 newmode.name = new_id_from_chars("U", 1);
862 newmode.code = irm_U;
865 newmode.modulo_shift = 32;
867 mode_U = register_mode(&newmode);
869 /* Reference Modes */
870 newmode.sort = irms_reference;
871 newmode.arithmetic = irma_twos_complement;
874 newmode.name = new_id_from_chars("P", 1);
875 newmode.code = irm_P;
878 newmode.modulo_shift = 0;
880 mode_P = register_mode(&newmode);
882 /* set the machine specific modes to the predifined ones */
883 mode_P_mach = mode_P;
886 /* find a signed mode for an unsigned integer mode */
887 ir_mode *find_unsigned_mode(const ir_mode *mode) {
890 if (mode->sort != irms_int_number);
892 return find_mode(&n);
895 /* find an unsigned mode for a signed integer mode */
896 ir_mode *find_signed_mode(const ir_mode *mode) {
899 assert(mode->sort == irms_int_number);
901 return find_mode(&n);
904 /* finds a integer mode with 2*n bits for an integer mode with n bits. */
905 ir_mode *find_double_bits_int_mode(const ir_mode *mode) {
908 assert(mode->sort == irms_int_number && mode->arithmetic == irma_twos_complement);
910 n.size = 2*mode->size;
911 return find_mode(&n);
914 void finish_mode(void) {
915 obstack_free(&modes, 0);