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 &&
62 m->align == n->align &&
64 m->modulo_shift == n->modulo_shift &&
65 m->vector_elem == n->vector_elem)
72 * calculates the next obstack address
74 static void *next_obstack_adr(struct obstack *o, void *p, size_t s)
76 PTR_INT_TYPE adr = __PTR_TO_INT((char *)p);
77 int mask = obstack_alignment_mask(o);
81 return __INT_TO_PTR(adr & ~mask);
85 * searches the modes obstack for the given mode and returns
86 * a pointer on an equal mode already in the array, NULL if
89 static ir_mode *find_mode(const ir_mode *m)
92 struct _obstack_chunk *p;
95 n = (ir_mode *)p->contents;
96 nn = next_obstack_adr(&modes, n, sizeof(*n));
97 for (; (char *)nn <= modes.next_free;) {
99 if (modes_are_equal(n, m))
103 nn = next_obstack_adr(&modes, n, sizeof(*n));
106 for (p = p->prev; p; p = p->prev) {
107 n = (ir_mode *)p->contents;
108 nn = next_obstack_adr(&modes, n, sizeof(*n));
109 for (; (char *)nn < p->limit;) {
111 if (modes_are_equal(n, m))
115 nn = next_obstack_adr(&modes, n, sizeof(*n));
123 * sets special values of modes
125 static void set_mode_values(ir_mode* mode)
127 switch (get_mode_sort(mode))
130 case irms_int_number:
131 case irms_float_number:
132 mode->min = get_tarval_min(mode);
133 mode->max = get_tarval_max(mode);
134 mode->null = get_tarval_null(mode);
135 mode->one = get_tarval_one(mode);
138 case irms_internal_boolean:
139 mode->min = tarval_b_false;
140 mode->max = tarval_b_true;
141 mode->null = tarval_b_false;
142 mode->one = tarval_b_true;
146 mode->min = tarval_bad;
147 mode->max = tarval_bad;
148 mode->null = (get_mode_modecode(mode) == irm_P) ? tarval_P_void : tarval_bad;
149 mode->one = tarval_bad;
154 case irms_control_flow:
155 mode->min = tarval_bad;
156 mode->max = tarval_bad;
157 mode->null = tarval_bad;
158 mode->one = tarval_bad;
164 * globals defined in irmode.h
167 /* --- Predefined modes --- */
169 /* FIRM internal modes: */
177 /* predefined numerical modes: */
178 ir_mode *mode_F; /* float */
179 ir_mode *mode_D; /* double */
180 ir_mode *mode_E; /* long double */
182 ir_mode *mode_Bs; /* integral values, signed and unsigned */
183 ir_mode *mode_Bu; /* 8 bit */
184 ir_mode *mode_Hs; /* 16 bit */
186 ir_mode *mode_Is; /* 32 bit */
188 ir_mode *mode_Ls; /* 64 bit */
196 /* machine specific modes */
197 ir_mode *mode_P_mach; /* machine specific pointer mode */
200 * functions defined in irmode.h
203 /* JNI access functions */
204 INLINE ir_mode *get_modeT(void) { ANNOUNCE(); return mode_T; }
205 INLINE ir_mode *get_modeF(void) { ANNOUNCE(); return mode_F; }
206 INLINE ir_mode *get_modeD(void) { ANNOUNCE(); return mode_D; }
207 INLINE ir_mode *get_modeE(void) { ANNOUNCE(); return mode_E; }
208 INLINE ir_mode *get_modeBs(void) { ANNOUNCE(); return mode_Bs; }
209 INLINE ir_mode *get_modeBu(void) { ANNOUNCE(); return mode_Bu; }
210 INLINE ir_mode *get_modeHs(void) { ANNOUNCE(); return mode_Hs; }
211 INLINE ir_mode *get_modeHu(void) { ANNOUNCE(); return mode_Hu; }
212 INLINE ir_mode *get_modeIs(void) { ANNOUNCE(); return mode_Is; }
213 INLINE ir_mode *get_modeIu(void) { ANNOUNCE(); return mode_Iu; }
214 INLINE ir_mode *get_modeLs(void) { ANNOUNCE(); return mode_Ls; }
215 INLINE ir_mode *get_modeLu(void) { ANNOUNCE(); return mode_Lu; }
216 INLINE ir_mode *get_modeC(void) { ANNOUNCE(); return mode_C; }
217 INLINE ir_mode *get_modeU(void) { ANNOUNCE(); return mode_U; }
218 INLINE ir_mode *get_modeb(void) { ANNOUNCE(); return mode_b; }
219 INLINE ir_mode *get_modeP(void) { ANNOUNCE(); return mode_P; }
220 INLINE ir_mode *get_modeX(void) { ANNOUNCE(); return mode_X; }
221 INLINE ir_mode *get_modeM(void) { ANNOUNCE(); return mode_M; }
222 INLINE ir_mode *get_modeBB(void) { ANNOUNCE(); return mode_BB; }
223 INLINE ir_mode *get_modeANY(void) { ANNOUNCE(); return mode_ANY; }
224 INLINE ir_mode *get_modeBAD(void) { ANNOUNCE(); return mode_BAD; }
227 ir_mode *(get_modeP_mach)(void) {
229 return __get_modeP_mach();
232 void (set_modeP_mach)(ir_mode *p) {
238 * Registers a new mode.
240 * @param new_mode The new mode template.
242 static ir_mode *register_mode(const ir_mode* new_mode)
244 ir_mode *mode = NULL;
249 /* copy mode struct to modes array */
250 mode = (ir_mode*)obstack_copy(&modes, new_mode, sizeof(ir_mode));
252 mode->kind = k_ir_mode;
253 if (num_modes >= irm_max) mode->code = num_modes;
256 set_mode_values(mode);
262 * Creates a new mode.
264 ir_mode *new_ir_mode(const char *name, mode_sort sort, int bit_size, int bit_align, int sign,
265 mode_arithmetic arithmetic, unsigned int modulo_shift )
270 mode_tmpl.name = new_id_from_str(name);
271 mode_tmpl.sort = sort;
272 mode_tmpl.size = bit_size;
273 mode_tmpl.align = bit_align;
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 bit_align, 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.align = bit_align;
319 mode_tmpl.sign = sign ? 1 : 0;
320 mode_tmpl.modulo_shift = (mode_tmpl.sort == irms_int_number) ? modulo_shift : 0;
321 mode_tmpl.vector_elem = num_of_elem;
322 mode_tmpl.arithmetic = arithmetic;
323 mode_tmpl.link = NULL;
324 mode_tmpl.tv_priv = NULL;
326 mode = find_mode(&mode_tmpl);
330 if (num_of_elem <= 1) {
331 assert(0 && "vector modes should have at least 2 elements");
339 case irms_control_flow:
341 case irms_internal_boolean:
342 assert(0 && "internal modes cannot be user defined");
347 assert(0 && "only integer and floating point modes can be vectorized");
350 case irms_float_number:
351 assert(0 && "not yet implemented");
354 case irms_int_number:
355 return register_mode(&mode_tmpl);
357 return NULL; /* to shut up gcc */
360 /* Functions for the direct access to all attributes od a ir_mode */
362 (get_mode_modecode)(const ir_mode *mode)
365 return __get_mode_modecode(mode);
369 (get_mode_ident)(const ir_mode *mode)
372 return __get_mode_ident(mode);
376 get_mode_name(const ir_mode *mode)
379 return get_id_str(mode->name);
383 (get_mode_sort)(const ir_mode* mode)
386 return __get_mode_sort(mode);
390 (get_mode_size_bits)(const ir_mode *mode)
393 return __get_mode_size_bits(mode);
397 (get_mode_size_bytes)(const ir_mode *mode) {
399 return __get_mode_size_bytes(mode);
403 (get_mode_align_bits)(const ir_mode *mode)
406 return __get_mode_align_bits(mode);
410 (get_mode_align_bytes)(const ir_mode *mode)
413 return __get_mode_align_bytes(mode);
417 (get_mode_sign)(const ir_mode *mode)
420 return __get_mode_sign(mode);
424 (get_mode_arithmetic)(const ir_mode *mode)
427 return get_mode_arithmetic(mode);
431 /* Attribute modulo shift specifies for modes of kind irms_int_number
432 * whether shift applies modulo to value of bits to shift. Asserts
433 * if mode is not irms_int_number.
436 (get_mode_modulo_shift)(const ir_mode *mode) {
437 return __get_mode_modulo_shift(mode);
441 (get_mode_vector_elems)(const ir_mode *mode) {
442 return __get_mode_vector_elems(mode);
446 (get_mode_link)(const ir_mode *mode)
449 return __get_mode_link(mode);
453 (set_mode_link)(ir_mode *mode, void *l)
455 __set_mode_link(mode, l);
459 get_mode_min (ir_mode *mode)
463 assert(get_mode_modecode(mode) < num_modes);
464 assert(mode_is_data(mode));
470 get_mode_max (ir_mode *mode)
474 assert(get_mode_modecode(mode) < num_modes);
475 assert(mode_is_data(mode));
481 get_mode_null (ir_mode *mode)
485 assert(get_mode_modecode(mode) < num_modes);
486 assert(mode_is_data(mode));
492 get_mode_one (ir_mode *mode)
496 assert(get_mode_modecode(mode) < num_modes);
497 assert(mode_is_data(mode));
503 get_mode_infinite(ir_mode *mode)
507 assert(get_mode_modecode(mode) < num_modes);
508 assert(mode_is_float(mode));
510 return get_tarval_inf(mode);
514 get_mode_NAN(ir_mode *mode)
518 assert(get_mode_modecode(mode) < num_modes);
519 assert(mode_is_float(mode));
521 return get_tarval_nan(mode);
525 is_mode (void *thing) {
527 if (get_kind(thing) == k_ir_mode)
534 (mode_is_signed)(const ir_mode *mode) {
536 return __mode_is_signed(mode);
540 (mode_is_float)(const ir_mode *mode) {
542 return __mode_is_float(mode);
546 (mode_is_int)(const ir_mode *mode) {
548 return __mode_is_int(mode);
552 (mode_is_character)(const ir_mode *mode) {
554 return __mode_is_character(mode);
558 (mode_is_reference)(const ir_mode *mode) {
560 return __mode_is_reference(mode);
564 (mode_is_num)(const ir_mode *mode) {
566 return __mode_is_num(mode);
570 (mode_is_numP)(const ir_mode *mode) {
572 return __mode_is_numP(mode);
576 (mode_is_data)(const ir_mode *mode) {
578 return __mode_is_data(mode);
582 (mode_is_datab)(const ir_mode *mode) {
584 return __mode_is_datab(mode);
588 (mode_is_dataM)(const ir_mode *mode) {
590 return __mode_is_dataM(mode);
594 (mode_is_float_vector)(const ir_mode *mode) {
596 return __mode_is_float_vector(mode);
600 (mode_is_int_vector)(const ir_mode *mode) {
602 return __mode_is_int_vector(mode);
605 /* Returns true if sm can be converted to lm without loss. */
607 smaller_mode(const ir_mode *sm, const ir_mode *lm)
609 int sm_bits, lm_bits;
615 if (sm == lm) return 1;
617 sm_bits = get_mode_size_bits(sm);
618 lm_bits = get_mode_size_bits(lm);
620 switch(get_mode_sort(sm))
622 case irms_int_number:
623 switch(get_mode_sort(lm))
625 case irms_int_number:
626 /* integers are convertable if
627 * - both have the same sign and lm is the larger one
628 * - lm is the signed one and is at least two bits larger
629 * (one for the sign, one for the highest bit of sm)
630 * - sm & lm are two_complement and lm has greater or equal number of bits
632 if ( get_mode_arithmetic(sm) == get_mode_arithmetic(lm)
633 && get_mode_arithmetic(sm) == irma_twos_complement) {
634 return lm_bits >= sm_bits;
636 else if (mode_is_signed(sm))
638 if ( mode_is_signed(lm) && (lm_bits >= sm_bits) )
641 else if (mode_is_signed(lm))
643 if (lm_bits > sm_bits + 1)
646 else if (lm_bits >= sm_bits)
652 case irms_float_number:
653 /* int to float works if the float is large enough */
661 case irms_float_number:
662 if (get_mode_arithmetic(sm) == get_mode_arithmetic(lm)) {
663 if ( (get_mode_sort(lm) == irms_float_number)
664 && (get_mode_size_bits(lm) >= get_mode_size_bits(sm)) )
670 /* do exist machines out there with different pointer lenghts ?*/
681 /* initialization, build the default modes */
687 /* init flexible array */
689 obstack_init(&modes);
692 /* initialize predefined modes */
695 newmode.arithmetic = irma_none;
699 newmode.modulo_shift = 0;
700 newmode.vector_elem = 0;
702 newmode.tv_priv = NULL;
704 /* Control Flow Modes*/
705 newmode.sort = irms_control_flow;
708 newmode.name = id_from_str("BB", 2);
709 newmode.code = irm_BB;
711 mode_BB = register_mode(&newmode);
714 newmode.name = id_from_str("X", 1);
715 newmode.code = irm_X;
717 mode_X = register_mode(&newmode);
720 newmode.sort = irms_memory;
723 newmode.name = id_from_str("M", 1);
724 newmode.code = irm_M;
726 mode_M = register_mode(&newmode);
728 /* Auxiliary Modes */
729 newmode.sort = irms_auxiliary,
732 newmode.name = id_from_str("T", 1);
733 newmode.code = irm_T;
735 mode_T = register_mode(&newmode);
738 newmode.name = id_from_str("ANY", 3);
739 newmode.code = irm_ANY;
741 mode_ANY = register_mode(&newmode);
744 newmode.name = id_from_str("BAD", 3);
745 newmode.code = irm_BAD;
747 mode_BAD = register_mode(&newmode);
749 /* Internal Boolean Modes */
750 newmode.sort = irms_internal_boolean;
753 newmode.name = id_from_str("b", 1);
754 newmode.code = irm_b;
756 mode_b = register_mode(&newmode);
759 newmode.vector_elem = 1;
761 /* Float Number Modes */
762 newmode.sort = irms_float_number;
763 newmode.arithmetic = irma_ieee754;
766 newmode.name = id_from_str("F", 1);
767 newmode.code = irm_F;
772 mode_F = register_mode(&newmode);
775 newmode.name = id_from_str("D", 1);
776 newmode.code = irm_D;
781 mode_D = register_mode(&newmode);
784 newmode.name = id_from_str("E", 1);
785 newmode.code = irm_E;
790 mode_E = register_mode(&newmode);
792 /* Integer Number Modes */
793 newmode.sort = irms_int_number;
794 newmode.arithmetic = irma_twos_complement;
797 newmode.name = id_from_str("Bs", 2);
798 newmode.code = irm_Bs;
802 newmode.modulo_shift = 32;
804 mode_Bs = register_mode(&newmode);
807 newmode.name = id_from_str("Bu", 2);
808 newmode.code = irm_Bu;
809 newmode.arithmetic = irma_twos_complement;
813 newmode.modulo_shift = 32;
815 mode_Bu = register_mode(&newmode);
817 /* signed short integer */
818 newmode.name = id_from_str("Hs", 2);
819 newmode.code = irm_Hs;
823 newmode.modulo_shift = 32;
825 mode_Hs = register_mode(&newmode);
827 /* unsigned short integer */
828 newmode.name = id_from_str("Hu", 2);
829 newmode.code = irm_Hu;
833 newmode.modulo_shift = 32;
835 mode_Hu = register_mode(&newmode);
838 newmode.name = id_from_str("Is", 2);
839 newmode.code = irm_Is;
843 newmode.modulo_shift = 32;
845 mode_Is = register_mode(&newmode);
847 /* unsigned integer */
848 newmode.name = id_from_str("Iu", 2);
849 newmode.code = irm_Iu;
853 newmode.modulo_shift = 32;
855 mode_Iu = register_mode(&newmode);
857 /* signed long integer */
858 newmode.name = id_from_str("Ls", 2);
859 newmode.code = irm_Ls;
863 newmode.modulo_shift = 64;
865 mode_Ls = register_mode(&newmode);
867 /* unsigned long integer */
868 newmode.name = id_from_str("Lu", 2);
869 newmode.code = irm_Lu;
873 newmode.modulo_shift = 64;
875 mode_Lu = register_mode(&newmode);
877 /* Character Modes */
878 newmode.sort = irms_character;
879 newmode.arithmetic = irma_none;
882 newmode.name = id_from_str("C", 1);
883 newmode.code = irm_C;
887 newmode.modulo_shift = 32;
889 mode_C = register_mode(&newmode);
891 /* Unicode character */
892 newmode.name = id_from_str("U", 1);
893 newmode.code = irm_U;
897 newmode.modulo_shift = 32;
899 mode_U = register_mode(&newmode);
901 /* Reference Modes */
902 newmode.sort = irms_reference;
903 newmode.arithmetic = irma_twos_complement;
906 newmode.name = id_from_str("P", 1);
907 newmode.code = irm_P;
911 newmode.modulo_shift = 0;
913 mode_P = register_mode(&newmode);
915 /* set the machine specific modes to the predifined ones */
916 mode_P_mach = mode_P;
920 void finish_mode(void) {
921 obstack_free(&modes, 0);