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 Representation of and static computations on target machine
25 * @author Mathias Heil
29 * Values are stored in a format depending upon chosen arithmetic
30 * module. Default uses strcalc and fltcalc.
31 * This implementation assumes:
32 * - target has IEEE-754 floating-point arithmetic.
38 #include <assert.h> /* assertions */
39 #include <stdlib.h> /* atoi() */
41 # include <string.h> /* nice things for strings */
44 #include <strings.h> /* strings.h also includes bsd only function strcasecmp */
51 #include "set.h" /* to store tarvals in */
52 #include "entity_t.h" /* needed to store pointers to entities */
54 #include "irnode.h" /* defines boolean return values (pnc_number)*/
59 #include "firm_common.h"
62 /** Size of hash tables. Should correspond to average number of distinct constant
64 #define N_CONSTANTS 2048
66 /* get the integer overflow mode */
67 #define GET_OVERFLOW_MODE() int_overflow_mode
69 /* unused, float to int doesn't work yet */
70 enum float_to_int_mode {
75 #define GET_FLOAT_TO_INT_MODE() TRUNCATE
77 #define SWITCH_NOINFINITY 0
78 #define SWITCH_NODENORMALS 0
80 /****************************************************************************
81 * local definitions and macros
82 ****************************************************************************/
84 # define TARVAL_VERIFY(a) tarval_verify((a))
86 # define TARVAL_VERIFY(a) ((void)0)
89 #define INSERT_TARVAL(tv) ((tarval*)set_insert(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
90 #define FIND_TARVAL(tv) ((tarval*)set_find(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
92 #define INSERT_VALUE(val, size) (set_insert(values, (val), size, hash_val((val), size)))
93 #define FIND_VALUE(val, size) (set_find(values, (val), size, hash_val((val), size)))
95 #define fail_verify(a) _fail_verify((a), __FILE__, __LINE__)
97 /****************************************************************************
99 ****************************************************************************/
100 static struct set *tarvals = NULL; /* container for tarval structs */
101 static struct set *values = NULL; /* container for values */
102 static tarval_int_overflow_mode_t int_overflow_mode = TV_OVERFLOW_WRAP;
104 /** if this is set non-zero, the constant folding for floating point is OFF */
105 static int no_float = 0;
107 /****************************************************************************
109 ****************************************************************************/
111 static int hash_val(const void *value, unsigned int length);
112 static int hash_tv(tarval *tv);
113 static void _fail_verify(tarval *tv, const char* file, int line)
115 /* print a memory image of the tarval and throw an assertion */
117 printf("%s:%d: Invalid tarval:\n mode: %s\n value: [%p]\n", file, line, get_mode_name(tv->mode), tv->value);
119 printf("%s:%d: Invalid tarval (null)", file, line);
123 INLINE static void tarval_verify(tarval *tv) __attribute__ ((unused));
126 INLINE static void tarval_verify(tarval *tv)
132 if ((tv == tarval_bad) || (tv == tarval_undefined)) return;
133 if ((tv == tarval_b_true) || (tv == tarval_b_false)) return;
135 if (!FIND_TARVAL(tv)) fail_verify(tv);
136 if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv);
142 /** Hash a tarval. */
143 static int hash_tv(tarval *tv) {
144 return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length;
147 /** Hash a value. Treat it as a byte array. */
148 static int hash_val(const void *value, unsigned int length) {
150 unsigned int hash = 0;
152 /* scramble the byte - array */
153 for (i = 0; i < length; ++i) {
154 hash += (hash << 5) ^ (hash >> 27) ^ ((char*)value)[i];
155 hash += (hash << 11) ^ (hash >> 17);
161 /** finds tarval with value/mode or creates new tarval */
162 static tarval *get_tarval(const void *value, int length, ir_mode *mode) {
169 /* if there already is such a value, it is returned, else value
170 * is copied into the set */
171 char *temp = alloca(length);
172 memcpy(temp, value, length);
173 if (get_mode_arithmetic(mode) == irma_twos_complement) {
174 sign_extend(temp, mode);
176 tv.value = INSERT_VALUE(temp, length);
180 /* if there is such a tarval, it is returned, else tv is copied
182 return (tarval *)INSERT_TARVAL(&tv);
188 static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
192 switch (get_mode_sort(mode)) {
194 /* addresses always wrap around */
195 temp = alloca(sc_get_buffer_length());
196 memcpy(temp, value, sc_get_buffer_length());
197 sc_truncate(get_mode_size_bits(mode), temp);
198 /* the sc_ module expects that all bits are set ... */
199 sign_extend(temp, mode);
200 return get_tarval(temp, length, mode);
202 case irms_int_number:
203 if (sc_comp(value, get_mode_max(mode)->value) == 1) {
204 switch (GET_OVERFLOW_MODE()) {
205 case TV_OVERFLOW_SATURATE:
206 return get_mode_max(mode);
207 case TV_OVERFLOW_WRAP:
208 temp = alloca(sc_get_buffer_length());
209 memcpy(temp, value, sc_get_buffer_length());
210 sc_truncate(get_mode_size_bits(mode), temp);
211 /* the sc_ module expects that all bits are set ... */
212 sign_extend(temp, mode);
213 return get_tarval(temp, length, mode);
214 case TV_OVERFLOW_BAD:
217 return get_tarval(value, length, mode);
220 if (sc_comp(value, get_mode_min(mode)->value) == -1) {
221 switch (GET_OVERFLOW_MODE()) {
222 case TV_OVERFLOW_SATURATE:
223 return get_mode_min(mode);
224 case TV_OVERFLOW_WRAP: {
225 char *temp = alloca(sc_get_buffer_length());
226 memcpy(temp, value, sc_get_buffer_length());
227 sc_truncate(get_mode_size_bits(mode), temp);
228 return get_tarval(temp, length, mode);
230 case TV_OVERFLOW_BAD:
233 return get_tarval(value, length, mode);
238 case irms_float_number:
239 if (SWITCH_NOINFINITY && fc_is_inf(value)) {
240 return fc_is_negative(value)?get_mode_min(mode):get_mode_max(mode);
243 if (SWITCH_NODENORMALS && fc_is_subnormal(value)) {
244 return get_mode_null(mode);
251 return get_tarval(value, length, mode);
255 * public variables declared in tv.h
257 static tarval reserved_tv[4];
259 tarval *tarval_bad = &reserved_tv[0];
260 tarval *tarval_undefined = &reserved_tv[1];
261 tarval *tarval_b_false = &reserved_tv[2];
262 tarval *tarval_b_true = &reserved_tv[3];
265 * public functions declared in tv.h
269 * Constructors =============================================================
271 tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
277 switch (get_mode_sort(mode)) {
278 case irms_control_flow:
284 case irms_internal_boolean:
285 /* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
286 if (strcasecmp(str, "true")) return tarval_b_true;
287 else if (strcasecmp(str, "false")) return tarval_b_true;
289 /* XXX This is C semantics */
290 return atoi(str) ? tarval_b_true : tarval_b_false;
292 case irms_float_number:
293 switch (get_mode_size_bits(mode)) {
295 fc_val_from_str(str, len, 8, 23, NULL);
298 fc_val_from_str(str, len, 11, 52, NULL);
301 fc_val_from_str(str, len, 15, 64, NULL);
304 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
307 /* same as integer modes */
308 case irms_int_number:
309 sc_val_from_str(str, len, NULL, mode);
310 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
313 assert(0); /* can't be reached, can it? */
318 * helper function, create a tarval from long
320 tarval *new_tarval_from_long(long l, ir_mode *mode) {
323 switch (get_mode_sort(mode)) {
324 case irms_internal_boolean:
325 /* XXX C semantics ! */
326 return l ? tarval_b_true : tarval_b_false ;
329 /* same as integer modes */
330 case irms_int_number:
331 sc_val_from_long(l, NULL);
332 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
334 case irms_float_number:
335 return new_tarval_from_double((long double)l, mode);
338 assert(0 && "unsupported mode sort");
343 /* returns non-zero if can be converted to long */
344 int tarval_is_long(tarval *tv) {
345 if (!mode_is_int(tv->mode) && !mode_is_reference(tv->mode))
348 if (get_mode_size_bits(tv->mode) > (int) (sizeof(long) << 3)) {
349 /* the value might be too big to fit in a long */
350 sc_max_from_bits(sizeof(long) << 3, 0, NULL);
351 if (sc_comp(sc_get_buffer(), tv->value) == -1) {
352 /* really doesn't fit */
359 /* this might overflow the machine's long, so use only with small values */
360 long get_tarval_long(tarval* tv) {
361 assert(tarval_is_long(tv) && "tarval too big to fit in long");
363 return sc_val_to_long(tv->value);
366 tarval *new_tarval_from_double(long double d, ir_mode *mode) {
367 assert(mode && (get_mode_sort(mode) == irms_float_number));
369 switch (get_mode_size_bits(mode)) {
371 fc_val_from_ieee754(d, 8, 23, NULL);
374 fc_val_from_ieee754(d, 11, 52, NULL);
377 fc_val_from_ieee754(d, 15, 64, NULL);
380 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
383 /* returns non-zero if can be converted to double */
384 int tarval_is_double(tarval *tv) {
387 return (get_mode_sort(tv->mode) == irms_float_number);
390 long double get_tarval_double(tarval *tv) {
391 assert(tarval_is_double(tv));
393 return fc_val_to_ieee754(tv->value);
398 * Access routines for tarval fields ========================================
401 /* get the mode of the tarval */
402 ir_mode *(get_tarval_mode)(const tarval *tv) {
403 return _get_tarval_mode(tv);
407 * Special value query functions ============================================
409 * These functions calculate and return a tarval representing the requested
411 * The functions get_mode_{Max,Min,...} return tarvals retrieved from these
412 * functions, but these are stored on initialization of the irmode module and
413 * therefore the irmode functions should be preferred to the functions below.
416 tarval *(get_tarval_bad)(void) {
417 return _get_tarval_bad();
420 tarval *(get_tarval_undefined)(void) {
421 return _get_tarval_undefined();
424 tarval *(get_tarval_b_false)(void) {
425 return _get_tarval_b_false();
428 tarval *(get_tarval_b_true)(void) {
429 return _get_tarval_b_true();
432 tarval *get_tarval_max(ir_mode *mode) {
435 if (get_mode_n_vector_elems(mode) > 1) {
436 /* vector arithmetic not implemented yet */
440 switch(get_mode_sort(mode)) {
441 case irms_control_flow:
447 case irms_internal_boolean:
448 return tarval_b_true;
450 case irms_float_number:
451 switch(get_mode_size_bits(mode)) {
453 fc_get_max(8, 23, NULL);
456 fc_get_max(11, 52, NULL);
459 fc_get_max(15, 64, NULL);
462 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
465 case irms_int_number:
466 sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
467 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
472 tarval *get_tarval_min(ir_mode *mode) {
475 if (get_mode_n_vector_elems(mode) > 1) {
476 /* vector arithmetic not implemented yet */
480 switch(get_mode_sort(mode)) {
481 case irms_control_flow:
487 case irms_internal_boolean:
488 return tarval_b_false;
490 case irms_float_number:
491 switch(get_mode_size_bits(mode)) {
493 fc_get_min(8, 23, NULL);
496 fc_get_min(11, 52, NULL);
499 fc_get_min(15, 64, NULL);
502 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
505 case irms_int_number:
506 sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
507 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
512 /** The bit pattern for the pointer NULL */
513 static long _null_value = 0;
515 tarval *get_tarval_null(ir_mode *mode) {
518 if (get_mode_n_vector_elems(mode) > 1) {
519 /* vector arithmetic not implemented yet */
523 switch(get_mode_sort(mode)) {
524 case irms_control_flow:
530 case irms_float_number:
531 return new_tarval_from_double(0.0, mode);
533 case irms_internal_boolean:
534 case irms_int_number:
535 return new_tarval_from_long(0l, mode);
538 return new_tarval_from_long(_null_value, mode);
543 tarval *get_tarval_one(ir_mode *mode) {
546 if (get_mode_n_vector_elems(mode) > 1) {
547 /* vector arithmetic not implemented yet */
552 switch(get_mode_sort(mode)) {
553 case irms_control_flow:
559 case irms_internal_boolean:
560 return tarval_b_true;
562 case irms_float_number:
563 return new_tarval_from_double(1.0, mode);
566 case irms_int_number:
567 return new_tarval_from_long(1l, mode);
572 tarval *get_tarval_all_one(ir_mode *mode) {
575 if (get_mode_n_vector_elems(mode) > 1) {
576 /* vector arithmetic not implemented yet */
581 switch(get_mode_sort(mode)) {
582 case irms_control_flow:
588 case irms_int_number:
589 case irms_internal_boolean:
591 return tarval_not(get_mode_null(mode));
594 case irms_float_number:
595 return new_tarval_from_double(1.0, mode);
600 tarval *get_tarval_minus_one(ir_mode *mode) {
603 if (get_mode_n_vector_elems(mode) > 1) {
604 /* vector arithmetic not implemented yet */
608 switch(get_mode_sort(mode)) {
609 case irms_control_flow:
612 case irms_internal_boolean:
619 case irms_float_number:
620 return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad;
622 case irms_int_number:
623 return new_tarval_from_long(-1l, mode);
628 tarval *get_tarval_nan(ir_mode *mode) {
631 if (get_mode_n_vector_elems(mode) > 1) {
632 /* vector arithmetic not implemented yet */
636 if (get_mode_sort(mode) == irms_float_number) {
637 switch(get_mode_size_bits(mode)) {
639 fc_get_qnan(8, 23, NULL);
642 fc_get_qnan(11, 52, NULL);
645 fc_get_qnan(15, 64, NULL);
648 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
650 assert(0 && "tarval is not floating point");
655 tarval *get_tarval_plus_inf(ir_mode *mode) {
658 if (get_mode_n_vector_elems(mode) > 1) {
659 /* vector arithmetic not implemented yet */
663 if (get_mode_sort(mode) == irms_float_number) {
664 switch(get_mode_size_bits(mode)) {
666 fc_get_plusinf(8, 23, NULL);
669 fc_get_plusinf(11, 52, NULL);
672 fc_get_plusinf(15, 64, NULL);
675 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
677 assert(0 && "tarval is not floating point");
682 tarval *get_tarval_minus_inf(ir_mode *mode) {
685 if (get_mode_n_vector_elems(mode) > 1) {
686 /* vector arithmetic not implemented yet */
690 if (get_mode_sort(mode) == irms_float_number) {
691 switch(get_mode_size_bits(mode)) {
693 fc_get_minusinf(8, 23, NULL);
696 fc_get_minusinf(11, 52, NULL);
699 fc_get_minusinf(15, 64, NULL);
702 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
704 assert(0 && "tarval is not floating point");
710 * Arithmethic operations on tarvals ========================================
714 * test if negative number, 1 means 'yes'
716 int tarval_is_negative(tarval *a) {
719 if (get_mode_n_vector_elems(a->mode) > 1) {
720 /* vector arithmetic not implemented yet */
721 assert(0 && "tarval_is_negative is not allowed for vector modes");
725 switch (get_mode_sort(a->mode)) {
726 case irms_int_number:
727 if (!mode_is_signed(a->mode)) return 0;
729 return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
731 case irms_float_number:
732 return fc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
735 assert(0 && "not implemented");
741 * test if null, 1 means 'yes'
743 int tarval_is_null(tarval *a) {
746 a == get_tarval_null(get_tarval_mode(a));
750 * test if one, 1 means 'yes'
752 int tarval_is_one(tarval *a) {
755 a == get_tarval_one(get_tarval_mode(a));
758 int tarval_is_all_one(tarval *tv) {
761 tv == get_mode_all_one(get_tarval_mode(tv));
765 * test if one, 1 means 'yes'
767 int tarval_is_minus_one(tarval *a) {
770 a == get_tarval_minus_one(get_tarval_mode(a));
776 pn_Cmp tarval_cmp(tarval *a, tarval *b) {
780 if (a == tarval_bad || b == tarval_bad) {
781 assert(0 && "Comparison with tarval_bad");
785 if (a == tarval_undefined || b == tarval_undefined)
788 if (a->mode != b->mode)
791 if (get_mode_n_vector_elems(a->mode) > 1) {
792 /* vector arithmetic not implemented yet */
793 assert(0 && "cmp not implemented for vector modes");
796 /* Here the two tarvals are unequal and of the same mode */
797 switch (get_mode_sort(a->mode)) {
798 case irms_control_flow:
805 case irms_float_number:
809 * BEWARE: we cannot compare a == b here, because
810 * a NaN is always Unordered to any other value, even to itself!
812 switch (fc_comp(a->value, b->value)) {
813 case -1: return pn_Cmp_Lt;
814 case 0: return pn_Cmp_Eq;
815 case 1: return pn_Cmp_Gt;
816 case 2: return pn_Cmp_Uo;
817 default: return pn_Cmp_False;
820 case irms_int_number:
823 return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt;
825 case irms_internal_boolean:
828 return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt;
834 * convert to other mode
836 tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
843 if (src->mode == dst_mode) return src;
845 if (get_mode_n_vector_elems(src->mode) > 1) {
846 /* vector arithmetic not implemented yet */
850 switch (get_mode_sort(src->mode)) {
851 case irms_control_flow:
856 /* cast float to something */
857 case irms_float_number:
858 switch (get_mode_sort(dst_mode)) {
859 case irms_float_number:
860 switch (get_mode_size_bits(dst_mode)) {
862 fc_cast(src->value, 8, 23, NULL);
865 fc_cast(src->value, 11, 52, NULL);
868 fc_cast(src->value, 15, 64, NULL);
873 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
875 case irms_int_number:
876 switch (GET_FLOAT_TO_INT_MODE()) {
878 res = fc_int(src->value, NULL);
881 res = fc_rnd(src->value, NULL);
887 if (! fc_flt2int(res, sc_get_buffer(), dst_mode))
889 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), dst_mode);
892 /* the rest can't be converted */
897 /* cast int/characters to something */
898 case irms_int_number:
899 switch (get_mode_sort(dst_mode)) {
902 case irms_int_number:
903 buffer = alloca(sc_get_buffer_length());
904 memcpy(buffer, src->value, sc_get_buffer_length());
905 sign_extend(buffer, dst_mode);
906 return get_tarval_overflow(buffer, src->length, dst_mode);
908 case irms_internal_boolean:
909 /* XXX C semantics */
910 if (src == get_mode_null(src->mode)) return tarval_b_false;
911 else return tarval_b_true;
913 case irms_float_number:
914 /* XXX floating point unit does not understand internal integer
915 * representation, convert to string first, then create float from
917 buffer = alloca(100);
918 /* decimal string representation because hexadecimal output is
919 * interpreted unsigned by fc_val_from_str, so this is a HACK */
920 snprintf(buffer, 100, "%s",
921 sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC, mode_is_signed(src->mode)));
922 buffer[100 - 1] = '\0';
923 switch (get_mode_size_bits(dst_mode)) {
925 fc_val_from_str(buffer, 0, 8, 23, NULL);
928 fc_val_from_str(buffer, 0, 11, 52, NULL);
931 fc_val_from_str(buffer, 0, 15, 64, NULL);
934 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
941 case irms_internal_boolean:
942 /* beware: this is C semantic for the INTERNAL boolean mode */
943 if (get_mode_sort(dst_mode) == irms_int_number)
944 return src == tarval_b_true ? get_mode_one(dst_mode) : get_mode_null(dst_mode);
948 if (get_mode_sort(dst_mode) == irms_int_number) {
949 buffer = alloca(sc_get_buffer_length());
950 memcpy(buffer, src->value, sc_get_buffer_length());
951 sign_extend(buffer, src->mode);
952 return get_tarval_overflow(buffer, src->length, dst_mode);
963 tarval *tarval_not(tarval *a) {
968 /* works for vector mode without changes */
970 switch (get_mode_sort(a->mode)) {
972 case irms_int_number:
973 buffer = alloca(sc_get_buffer_length());
974 sc_not(a->value, buffer);
975 return get_tarval(buffer, a->length, a->mode);
977 case irms_internal_boolean:
978 if (a == tarval_b_true)
979 return tarval_b_false;
980 if (a == tarval_b_false)
981 return tarval_b_true;
985 assert(0 && "bitwise negation is only allowed for integer and boolean");
991 * arithmetic negation
993 tarval *tarval_neg(tarval *a) {
997 assert(mode_is_num(a->mode)); /* negation only for numerical values */
999 /* note: negation is allowed even for unsigned modes. */
1001 if (get_mode_n_vector_elems(a->mode) > 1) {
1002 /* vector arithmetic not implemented yet */
1006 switch (get_mode_sort(a->mode)) {
1007 case irms_int_number:
1008 buffer = alloca(sc_get_buffer_length());
1009 sc_neg(a->value, buffer);
1010 return get_tarval_overflow(buffer, a->length, a->mode);
1012 case irms_float_number:
1016 fc_neg(a->value, NULL);
1017 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1027 tarval *tarval_add(tarval *a, tarval *b) {
1032 assert(a->mode == b->mode);
1034 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
1035 /* vector arithmetic not implemented yet */
1039 switch (get_mode_sort(a->mode)) {
1040 case irms_int_number:
1041 /* modes of a,b are equal, so result has mode of a as this might be the character */
1042 buffer = alloca(sc_get_buffer_length());
1043 sc_add(a->value, b->value, buffer);
1044 return get_tarval_overflow(buffer, a->length, a->mode);
1046 case irms_float_number:
1050 fc_add(a->value, b->value, NULL);
1051 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1061 tarval *tarval_sub(tarval *a, tarval *b) {
1066 assert(a->mode == b->mode);
1068 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
1069 /* vector arithmetic not implemented yet */
1072 switch (get_mode_sort(a->mode)) {
1073 case irms_int_number:
1074 /* modes of a,b are equal, so result has mode of a as this might be the character */
1075 buffer = alloca(sc_get_buffer_length());
1076 sc_sub(a->value, b->value, buffer);
1077 return get_tarval_overflow(buffer, a->length, a->mode);
1079 case irms_float_number:
1083 fc_sub(a->value, b->value, NULL);
1084 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1094 tarval *tarval_mul(tarval *a, tarval *b) {
1099 assert(a->mode == b->mode);
1101 if (get_mode_n_vector_elems(a->mode) > 1) {
1102 /* vector arithmetic not implemented yet */
1106 switch (get_mode_sort(a->mode)) {
1107 case irms_int_number:
1108 /* modes of a,b are equal */
1109 buffer = alloca(sc_get_buffer_length());
1110 sc_mul(a->value, b->value, buffer);
1111 return get_tarval_overflow(buffer, a->length, a->mode);
1113 case irms_float_number:
1117 fc_mul(a->value, b->value, NULL);
1118 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1126 * floating point division
1128 tarval *tarval_quo(tarval *a, tarval *b) {
1131 assert((a->mode == b->mode) && mode_is_float(a->mode));
1136 if (get_mode_n_vector_elems(a->mode) > 1) {
1137 /* vector arithmetic not implemented yet */
1141 fc_div(a->value, b->value, NULL);
1142 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1147 * overflow is impossible, but look out for division by zero
1149 tarval *tarval_div(tarval *a, tarval *b) {
1152 assert((a->mode == b->mode) && mode_is_int(a->mode));
1154 if (get_mode_n_vector_elems(a->mode) > 1) {
1155 /* vector arithmetic not implemented yet */
1160 if (b == get_mode_null(b->mode)) return tarval_bad;
1161 /* modes of a,b are equal */
1162 sc_div(a->value, b->value, NULL);
1163 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1168 * overflow is impossible, but look out for division by zero
1170 tarval *tarval_mod(tarval *a, tarval *b) {
1173 assert((a->mode == b->mode) && mode_is_int(a->mode));
1175 if (get_mode_n_vector_elems(a->mode) > 1) {
1176 /* vector arithmetic not implemented yet */
1181 if (b == get_mode_null(b->mode)) return tarval_bad;
1182 /* modes of a,b are equal */
1183 sc_mod(a->value, b->value, NULL);
1184 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1188 * integer division AND remainder
1189 * overflow is impossible, but look out for division by zero
1191 tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
1192 int len = sc_get_buffer_length();
1193 char *div_res = alloca(len);
1194 char *mod_res = alloca(len);
1198 assert((a->mode == b->mode) && mode_is_int(a->mode));
1200 if (get_mode_n_vector_elems(a->mode) > 1) {
1201 /* vector arithmetic not implemented yet */
1207 if (b == get_mode_null(b->mode)) return tarval_bad;
1208 /* modes of a,b are equal */
1209 sc_divmod(a->value, b->value, div_res, mod_res);
1210 *mod = get_tarval(mod_res, len, a->mode);
1211 return get_tarval(div_res, len, a->mode);
1217 tarval *tarval_abs(tarval *a) {
1221 assert(mode_is_num(a->mode));
1223 if (get_mode_n_vector_elems(a->mode) > 1) {
1224 /* vector arithmetic not implemented yet */
1228 switch (get_mode_sort(a->mode)) {
1229 case irms_int_number:
1230 if (sc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
1231 buffer = alloca(sc_get_buffer_length());
1232 sc_neg(a->value, buffer);
1233 return get_tarval_overflow(buffer, a->length, a->mode);
1237 case irms_float_number:
1241 if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
1242 fc_neg(a->value, NULL);
1243 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1256 tarval *tarval_and(tarval *a, tarval *b) {
1259 assert(a->mode == b->mode);
1261 /* works even for vector modes */
1263 switch(get_mode_sort(a->mode)) {
1264 case irms_internal_boolean:
1265 return (a == tarval_b_false) ? a : b;
1267 case irms_int_number:
1268 sc_and(a->value, b->value, NULL);
1269 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1272 assert(0 && "operation not defined on mode");
1280 tarval *tarval_or (tarval *a, tarval *b) {
1283 assert(a->mode == b->mode);
1285 /* works even for vector modes */
1287 switch (get_mode_sort(a->mode)) {
1288 case irms_internal_boolean:
1289 return (a == tarval_b_true) ? a : b;
1291 case irms_int_number:
1292 sc_or(a->value, b->value, NULL);
1293 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1296 assert(0 && "operation not defined on mode");
1302 * bitwise exclusive or (xor)
1304 tarval *tarval_eor(tarval *a, tarval *b) {
1307 assert((a->mode == b->mode));
1309 /* works even for vector modes */
1311 switch (get_mode_sort(a->mode)) {
1312 case irms_internal_boolean:
1313 return (a == b)? tarval_b_false : tarval_b_true;
1315 case irms_int_number:
1316 sc_xor(a->value, b->value, NULL);
1317 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1320 assert(0 && "operation not defined on mode");
1326 * bitwise left shift
1328 tarval *tarval_shl(tarval *a, tarval *b) {
1329 char *temp_val = NULL;
1333 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1335 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1336 /* vector arithmetic not implemented yet */
1340 if (get_mode_modulo_shift(a->mode) != 0) {
1341 temp_val = alloca(sc_get_buffer_length());
1343 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1344 sc_mod(b->value, temp_val, temp_val);
1346 temp_val = (char*)b->value;
1348 sc_shl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1349 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1353 * bitwise unsigned right shift
1355 tarval *tarval_shr(tarval *a, tarval *b) {
1356 char *temp_val = NULL;
1360 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1362 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1363 /* vector arithmetic not implemented yet */
1367 if (get_mode_modulo_shift(a->mode) != 0) {
1368 temp_val = alloca(sc_get_buffer_length());
1370 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1371 sc_mod(b->value, temp_val, temp_val);
1373 temp_val = (char*)b->value;
1375 sc_shr(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1376 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1380 * bitwise signed right shift
1382 tarval *tarval_shrs(tarval *a, tarval *b) {
1383 char *temp_val = NULL;
1387 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1389 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1390 /* vector arithmetic not implemented yet */
1394 if (get_mode_modulo_shift(a->mode) != 0) {
1395 temp_val = alloca(sc_get_buffer_length());
1397 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1398 sc_mod(b->value, temp_val, temp_val);
1400 temp_val = (char*)b->value;
1402 sc_shrs(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1403 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1409 tarval *tarval_rot(tarval *a, tarval *b) {
1410 char *temp_val = NULL;
1414 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1416 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1417 /* vector arithmetic not implemented yet */
1421 if (get_mode_modulo_shift(a->mode) != 0) {
1422 temp_val = alloca(sc_get_buffer_length());
1424 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1425 sc_mod(b->value, temp_val, temp_val);
1427 temp_val = (char*)b->value;
1429 sc_rot(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1430 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1434 * carry flag of the last operation
1436 int tarval_carry(void) {
1437 return sc_had_carry();
1443 int tarval_snprintf(char *buf, size_t len, tarval *tv) {
1444 static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL };
1448 const tarval_mode_info *mode_info;
1449 const char *prefix, *suffix;
1451 mode_info = tv->mode->tv_priv;
1453 mode_info = &default_info;
1454 prefix = mode_info->mode_prefix ? mode_info->mode_prefix : "";
1455 suffix = mode_info->mode_suffix ? mode_info->mode_suffix : "";
1457 switch (get_mode_sort(tv->mode)) {
1458 case irms_reference:
1459 if (tv == tv->mode->null) return snprintf(buf, len, "NULL");
1461 case irms_int_number:
1462 switch (mode_info->mode_output) {
1465 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_DEC, mode_is_signed(tv->mode));
1469 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT, 0);
1475 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX, 0);
1478 return snprintf(buf, len, "%s%s%s", prefix, str, suffix);
1480 case irms_float_number:
1481 switch (mode_info->mode_output) {
1483 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_PACKED), suffix);
1486 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_HEX), suffix);
1491 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_DEC), suffix);
1495 case irms_internal_boolean:
1496 switch (mode_info->mode_output) {
1502 return snprintf(buf, len, "%s%c%s", prefix, (tv == tarval_b_true) ? '1' : '0', suffix);
1506 return snprintf(buf, len, "%s%s%s", prefix, (tv == tarval_b_true) ? "true" : "false", suffix);
1509 case irms_control_flow:
1511 case irms_auxiliary:
1512 return snprintf(buf, len, "<TV_OVERFLOW_BAD>");
1519 * Output of tarvals to stdio.
1521 int tarval_printf(tarval *tv) {
1525 res = tarval_snprintf(buf, sizeof(buf), tv);
1526 assert(res < (int) sizeof(buf) && "buffer to small for tarval_snprintf");
1531 char *get_tarval_bitpattern(tarval *tv) {
1533 int n = get_mode_size_bits(tv->mode);
1534 int bytes = (n + 7) / 8;
1535 char *res = xmalloc((n + 1) * sizeof(char));
1538 for(i = 0; i < bytes; i++) {
1539 byte = get_tarval_sub_bits(tv, i);
1540 for(j = 1; j < 256; j <<= 1)
1542 res[pos++] = j & byte ? '1' : '0';
1551 * access to the bitpattern
1553 unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) {
1554 switch (get_mode_arithmetic(tv->mode)) {
1555 case irma_twos_complement:
1556 return sc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
1558 return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
1560 panic("get_tarval_sub_bits(): arithmetic mode not supported");
1565 * Specify the output options of one mode.
1567 * This functions stores the modinfo, so DO NOT DESTROY it.
1569 * Returns zero on success.
1571 int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo) {
1574 mode->tv_priv = modeinfo;
1579 * Returns the output options of one mode.
1581 * This functions returns the mode info of a given mode.
1583 const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) {
1586 return mode->tv_priv;
1590 * Returns non-zero if a given (integer) tarval has only one single bit
1593 int tarval_is_single_bit(tarval *tv) {
1597 if (!tv || tv == tarval_bad) return 0;
1598 if (! mode_is_int(tv->mode)) return 0;
1600 l = get_mode_size_bytes(tv->mode);
1601 for (bits = 0, i = l - 1; i >= 0; --i) {
1602 unsigned char v = get_tarval_sub_bits(tv, (unsigned)i);
1604 /* check for more than one bit in these */
1616 * Returns non-zero if the mantissa of a floating point IEEE-754
1617 * tarval is zero (i.e. 1.0Exxx)
1619 int tarval_ieee754_zero_mantissa(tarval *tv) {
1620 assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
1621 return fc_zero_mantissa(tv->value);
1624 /* Returns the exponent of a floating point IEEE-754 tarval. */
1625 int tarval_ieee754_get_exponent(tarval *tv) {
1626 assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
1627 return fc_get_exponent(tv->value);
1630 /* Set the immediate precision for IEEE-754 results. */
1631 unsigned tarval_ieee754_set_immediate_precision(unsigned bits) {
1632 return fc_set_immediate_precision(bits);
1635 /* Returns non-zero if the result of the last IEEE-754 operation was exact. */
1636 unsigned tarval_ieee754_get_exact(void) {
1637 return fc_is_exact();
1641 * Sets the overflow mode for integer operations.
1643 void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) {
1644 int_overflow_mode = ov_mode;
1647 /* Get the overflow mode for integer operations. */
1648 tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void) {
1649 return int_overflow_mode;
1652 /* Enable/Disable floating point constant folding. */
1653 int tarval_enable_fp_ops(int enable) {
1654 int old = !no_float;
1661 * default mode_info for output as HEX
1663 static const tarval_mode_info hex_output = {
1670 * Initialization of the tarval module: called before init_mode()
1672 void init_tarval_1(long null_value) {
1673 _null_value = null_value;
1675 /* initialize the sets holding the tarvals with a comparison function and
1676 * an initial size, which is the expected number of constants */
1677 tarvals = new_set(memcmp, N_CONSTANTS);
1678 values = new_set(memcmp, N_CONSTANTS);
1679 /* init strcalc with precision of 68 to support floating point values with 64
1680 * bit mantissa (needs extra bits for rounding and overflow) */
1686 * Initialization of the tarval module: called after init_mode()
1688 void init_tarval_2(void) {
1689 tarval_bad->kind = k_tarval;
1690 tarval_bad->mode = mode_BAD;
1691 tarval_bad->value = INT_TO_PTR(resid_tarval_bad);
1693 tarval_undefined->kind = k_tarval;
1694 tarval_undefined->mode = mode_ANY;
1695 tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined);
1697 tarval_b_true->kind = k_tarval;
1698 tarval_b_true->mode = mode_b;
1699 tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true);
1701 tarval_b_false->kind = k_tarval;
1702 tarval_b_false->mode = mode_b;
1703 tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false);
1706 * assign output modes that are compatible with the
1707 * old implementation: Hex output
1709 set_tarval_mode_output_option(mode_Bs, &hex_output);
1710 set_tarval_mode_output_option(mode_Bu, &hex_output);
1711 set_tarval_mode_output_option(mode_Hs, &hex_output);
1712 set_tarval_mode_output_option(mode_Hu, &hex_output);
1713 set_tarval_mode_output_option(mode_Is, &hex_output);
1714 set_tarval_mode_output_option(mode_Iu, &hex_output);
1715 set_tarval_mode_output_option(mode_Ls, &hex_output);
1716 set_tarval_mode_output_option(mode_Lu, &hex_output);
1717 set_tarval_mode_output_option(mode_P, &hex_output);
1720 /* free all memory occupied by tarval. */
1721 void finish_tarval(void) {
1724 del_set(tarvals); tarvals = NULL;
1725 del_set(values); values = NULL;
1728 /****************************************************************************
1730 ****************************************************************************/