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(mode_is_float(mode)) {
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 sc_val_from_ulong(-1, temp);
197 sc_and(temp, value, 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 sc_val_from_ulong(-1, temp);
210 sc_and(temp, value, 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 sc_val_from_ulong(-1, temp);
227 sc_and(temp, value, 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:
527 case irms_internal_boolean:
531 case irms_float_number:
532 return new_tarval_from_double(0.0, mode);
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) {
744 ir_mode *m = get_tarval_mode(a);
746 return a == get_tarval_null(m);
750 * test if one, 1 means 'yes'
752 int tarval_is_one(tarval *a) {
753 ir_mode *m = get_tarval_mode(a);
755 return a == get_tarval_one(m);
761 pn_Cmp tarval_cmp(tarval *a, tarval *b) {
765 if (a == tarval_bad || b == tarval_bad) {
766 assert(0 && "Comparison with tarval_bad");
770 if (a == tarval_undefined || b == tarval_undefined)
773 if (a->mode != b->mode)
776 if (get_mode_n_vector_elems(a->mode) > 1) {
777 /* vector arithmetic not implemented yet */
778 assert(0 && "cmp not implemented for vector modes");
781 /* Here the two tarvals are unequal and of the same mode */
782 switch (get_mode_sort(a->mode)) {
783 case irms_control_flow:
790 case irms_float_number:
794 * BEWARE: we cannot compare a == b here, because
795 * a NaN is always Unordered to any other value, even to itself!
797 switch (fc_comp(a->value, b->value)) {
798 case -1: return pn_Cmp_Lt;
799 case 0: return pn_Cmp_Eq;
800 case 1: return pn_Cmp_Gt;
801 case 2: return pn_Cmp_Uo;
802 default: return pn_Cmp_False;
805 case irms_int_number:
808 return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt;
810 case irms_internal_boolean:
813 return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt;
819 * convert to other mode
821 tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
828 if (src->mode == dst_mode) return src;
830 if (get_mode_n_vector_elems(src->mode) > 1) {
831 /* vector arithmetic not implemented yet */
835 switch (get_mode_sort(src->mode)) {
836 case irms_control_flow:
841 /* cast float to something */
842 case irms_float_number:
843 switch (get_mode_sort(dst_mode)) {
844 case irms_float_number:
845 switch (get_mode_size_bits(dst_mode)) {
847 fc_cast(src->value, 8, 23, NULL);
850 fc_cast(src->value, 11, 52, NULL);
853 fc_cast(src->value, 15, 64, NULL);
858 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
860 case irms_int_number:
861 switch (GET_FLOAT_TO_INT_MODE()) {
863 res = fc_int(src->value, NULL);
866 res = fc_rnd(src->value, NULL);
872 if (! fc_flt2int(res, sc_get_buffer(), dst_mode))
874 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), dst_mode);
877 /* the rest can't be converted */
882 /* cast int/characters to something */
883 case irms_int_number:
884 switch (get_mode_sort(dst_mode)) {
887 case irms_int_number:
888 buffer = alloca(sc_get_buffer_length());
889 memcpy(buffer, src->value, sc_get_buffer_length());
890 sign_extend(buffer, dst_mode);
891 return get_tarval_overflow(buffer, src->length, dst_mode);
893 case irms_internal_boolean:
894 /* XXX C semantics */
895 if (src == get_mode_null(src->mode)) return tarval_b_false;
896 else return tarval_b_true;
898 case irms_float_number:
899 /* XXX floating point unit does not understand internal integer
900 * representation, convert to string first, then create float from
902 buffer = alloca(100);
903 /* decimal string representation because hexadecimal output is
904 * interpreted unsigned by fc_val_from_str, so this is a HACK */
905 snprintf(buffer, 100, "%s",
906 sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC, mode_is_signed(src->mode)));
907 buffer[100 - 1] = '\0';
908 switch (get_mode_size_bits(dst_mode)) {
910 fc_val_from_str(buffer, 0, 8, 23, NULL);
913 fc_val_from_str(buffer, 0, 11, 52, NULL);
916 fc_val_from_str(buffer, 0, 15, 64, NULL);
919 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
926 case irms_internal_boolean:
927 /* beware: this is C semantic for the INTERNAL boolean mode */
928 if (get_mode_sort(dst_mode) == irms_int_number)
929 return src == tarval_b_true ? get_mode_one(dst_mode) : get_mode_null(dst_mode);
933 if (get_mode_sort(dst_mode) == irms_int_number) {
934 buffer = alloca(sc_get_buffer_length());
935 memcpy(buffer, src->value, sc_get_buffer_length());
936 sign_extend(buffer, src->mode);
937 return get_tarval_overflow(buffer, src->length, dst_mode);
948 tarval *tarval_not(tarval *a) {
953 /* works for vector mode without changes */
955 switch (get_mode_sort(a->mode)) {
957 case irms_int_number:
958 buffer = alloca(sc_get_buffer_length());
959 sc_not(a->value, buffer);
960 return get_tarval(buffer, a->length, a->mode);
962 case irms_internal_boolean:
963 if (a == tarval_b_true)
964 return tarval_b_false;
965 if (a == tarval_b_false)
966 return tarval_b_true;
970 assert(0 && "bitwise negation is only allowed for integer and boolean");
976 * arithmetic negation
978 tarval *tarval_neg(tarval *a) {
982 assert(mode_is_num(a->mode)); /* negation only for numerical values */
984 /* note: negation is allowed even for unsigned modes. */
986 if (get_mode_n_vector_elems(a->mode) > 1) {
987 /* vector arithmetic not implemented yet */
991 switch (get_mode_sort(a->mode)) {
992 case irms_int_number:
993 buffer = alloca(sc_get_buffer_length());
994 sc_neg(a->value, buffer);
995 return get_tarval_overflow(buffer, a->length, a->mode);
997 case irms_float_number:
1001 fc_neg(a->value, NULL);
1002 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1012 tarval *tarval_add(tarval *a, tarval *b) {
1017 assert(a->mode == b->mode);
1019 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
1020 /* vector arithmetic not implemented yet */
1024 switch (get_mode_sort(a->mode)) {
1025 case irms_int_number:
1026 /* modes of a,b are equal, so result has mode of a as this might be the character */
1027 buffer = alloca(sc_get_buffer_length());
1028 sc_add(a->value, b->value, buffer);
1029 return get_tarval_overflow(buffer, a->length, a->mode);
1031 case irms_float_number:
1035 fc_add(a->value, b->value, NULL);
1036 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1046 tarval *tarval_sub(tarval *a, tarval *b) {
1051 assert(a->mode == b->mode);
1053 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
1054 /* vector arithmetic not implemented yet */
1057 switch (get_mode_sort(a->mode)) {
1058 case irms_int_number:
1059 /* modes of a,b are equal, so result has mode of a as this might be the character */
1060 buffer = alloca(sc_get_buffer_length());
1061 sc_sub(a->value, b->value, buffer);
1062 return get_tarval_overflow(buffer, a->length, a->mode);
1064 case irms_float_number:
1068 fc_sub(a->value, b->value, NULL);
1069 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1079 tarval *tarval_mul(tarval *a, tarval *b) {
1084 assert(a->mode == b->mode);
1086 if (get_mode_n_vector_elems(a->mode) > 1) {
1087 /* vector arithmetic not implemented yet */
1091 switch (get_mode_sort(a->mode)) {
1092 case irms_int_number:
1093 /* modes of a,b are equal */
1094 buffer = alloca(sc_get_buffer_length());
1095 sc_mul(a->value, b->value, buffer);
1096 return get_tarval_overflow(buffer, a->length, a->mode);
1098 case irms_float_number:
1102 fc_mul(a->value, b->value, NULL);
1103 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1111 * floating point division
1113 tarval *tarval_quo(tarval *a, tarval *b) {
1116 assert((a->mode == b->mode) && mode_is_float(a->mode));
1121 if (get_mode_n_vector_elems(a->mode) > 1) {
1122 /* vector arithmetic not implemented yet */
1126 fc_div(a->value, b->value, NULL);
1127 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1132 * overflow is impossible, but look out for division by zero
1134 tarval *tarval_div(tarval *a, tarval *b) {
1137 assert((a->mode == b->mode) && mode_is_int(a->mode));
1139 if (get_mode_n_vector_elems(a->mode) > 1) {
1140 /* vector arithmetic not implemented yet */
1145 if (b == get_mode_null(b->mode)) return tarval_bad;
1146 /* modes of a,b are equal */
1147 sc_div(a->value, b->value, NULL);
1148 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1153 * overflow is impossible, but look out for division by zero
1155 tarval *tarval_mod(tarval *a, tarval *b) {
1158 assert((a->mode == b->mode) && mode_is_int(a->mode));
1160 if (get_mode_n_vector_elems(a->mode) > 1) {
1161 /* vector arithmetic not implemented yet */
1166 if (b == get_mode_null(b->mode)) return tarval_bad;
1167 /* modes of a,b are equal */
1168 sc_mod(a->value, b->value, NULL);
1169 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1173 * integer division AND remainder
1174 * overflow is impossible, but look out for division by zero
1176 tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
1177 int len = sc_get_buffer_length();
1178 char *div_res = alloca(len);
1179 char *mod_res = alloca(len);
1183 assert((a->mode == b->mode) && mode_is_int(a->mode));
1185 if (get_mode_n_vector_elems(a->mode) > 1) {
1186 /* vector arithmetic not implemented yet */
1192 if (b == get_mode_null(b->mode)) return tarval_bad;
1193 /* modes of a,b are equal */
1194 sc_divmod(a->value, b->value, div_res, mod_res);
1195 *mod = get_tarval(mod_res, len, a->mode);
1196 return get_tarval(div_res, len, a->mode);
1202 tarval *tarval_abs(tarval *a) {
1206 assert(mode_is_num(a->mode));
1208 if (get_mode_n_vector_elems(a->mode) > 1) {
1209 /* vector arithmetic not implemented yet */
1213 switch (get_mode_sort(a->mode)) {
1214 case irms_int_number:
1215 if (sc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
1216 buffer = alloca(sc_get_buffer_length());
1217 sc_neg(a->value, buffer);
1218 return get_tarval_overflow(buffer, a->length, a->mode);
1222 case irms_float_number:
1226 if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
1227 fc_neg(a->value, NULL);
1228 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1241 tarval *tarval_and(tarval *a, tarval *b) {
1244 assert(a->mode == b->mode);
1246 /* works even for vector modes */
1248 switch(get_mode_sort(a->mode)) {
1249 case irms_internal_boolean:
1250 return (a == tarval_b_false) ? a : b;
1252 case irms_int_number:
1253 sc_and(a->value, b->value, NULL);
1254 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1257 assert(0 && "operation not defined on mode");
1265 tarval *tarval_or (tarval *a, tarval *b) {
1268 assert(a->mode == b->mode);
1270 /* works even for vector modes */
1272 switch (get_mode_sort(a->mode)) {
1273 case irms_internal_boolean:
1274 return (a == tarval_b_true) ? a : b;
1276 case irms_int_number:
1277 sc_or(a->value, b->value, NULL);
1278 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1281 assert(0 && "operation not defined on mode");
1287 * bitwise exclusive or (xor)
1289 tarval *tarval_eor(tarval *a, tarval *b) {
1292 assert((a->mode == b->mode));
1294 /* works even for vector modes */
1296 switch (get_mode_sort(a->mode)) {
1297 case irms_internal_boolean:
1298 return (a == b)? tarval_b_false : tarval_b_true;
1300 case irms_int_number:
1301 sc_xor(a->value, b->value, NULL);
1302 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1305 assert(0 && "operation not defined on mode");
1311 * bitwise left shift
1313 tarval *tarval_shl(tarval *a, tarval *b) {
1314 char *temp_val = NULL;
1318 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1320 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1321 /* vector arithmetic not implemented yet */
1325 if (get_mode_modulo_shift(a->mode) != 0) {
1326 temp_val = alloca(sc_get_buffer_length());
1328 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1329 sc_mod(b->value, temp_val, temp_val);
1331 temp_val = (char*)b->value;
1333 sc_shl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1334 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1338 * bitwise unsigned right shift
1340 tarval *tarval_shr(tarval *a, tarval *b) {
1341 char *temp_val = NULL;
1345 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1347 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1348 /* vector arithmetic not implemented yet */
1352 if (get_mode_modulo_shift(a->mode) != 0) {
1353 temp_val = alloca(sc_get_buffer_length());
1355 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1356 sc_mod(b->value, temp_val, temp_val);
1358 temp_val = (char*)b->value;
1360 sc_shr(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1361 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1365 * bitwise signed right shift
1367 tarval *tarval_shrs(tarval *a, tarval *b) {
1368 char *temp_val = NULL;
1372 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1374 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1375 /* vector arithmetic not implemented yet */
1379 if (get_mode_modulo_shift(a->mode) != 0) {
1380 temp_val = alloca(sc_get_buffer_length());
1382 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1383 sc_mod(b->value, temp_val, temp_val);
1385 temp_val = (char*)b->value;
1387 sc_shrs(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1388 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1394 tarval *tarval_rot(tarval *a, tarval *b) {
1395 char *temp_val = NULL;
1399 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1401 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1402 /* vector arithmetic not implemented yet */
1406 if (get_mode_modulo_shift(a->mode) != 0) {
1407 temp_val = alloca(sc_get_buffer_length());
1409 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1410 sc_mod(b->value, temp_val, temp_val);
1412 temp_val = (char*)b->value;
1414 sc_rot(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1415 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1419 * carry flag of the last operation
1421 int tarval_carry(void) {
1422 return sc_had_carry();
1428 int tarval_snprintf(char *buf, size_t len, tarval *tv) {
1429 static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL };
1433 const tarval_mode_info *mode_info;
1434 const char *prefix, *suffix;
1436 mode_info = tv->mode->tv_priv;
1438 mode_info = &default_info;
1439 prefix = mode_info->mode_prefix ? mode_info->mode_prefix : "";
1440 suffix = mode_info->mode_suffix ? mode_info->mode_suffix : "";
1442 switch (get_mode_sort(tv->mode)) {
1443 case irms_reference:
1444 if (tv == tv->mode->null) return snprintf(buf, len, "NULL");
1446 case irms_int_number:
1447 switch (mode_info->mode_output) {
1450 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_DEC, mode_is_signed(tv->mode));
1454 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT, 0);
1460 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX, 0);
1463 return snprintf(buf, len, "%s%s%s", prefix, str, suffix);
1465 case irms_float_number:
1466 switch (mode_info->mode_output) {
1468 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_PACKED), suffix);
1471 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_HEX), suffix);
1476 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_DEC), suffix);
1480 case irms_internal_boolean:
1481 switch (mode_info->mode_output) {
1487 return snprintf(buf, len, "%s%c%s", prefix, (tv == tarval_b_true) ? '1' : '0', suffix);
1491 return snprintf(buf, len, "%s%s%s", prefix, (tv == tarval_b_true) ? "true" : "false", suffix);
1494 case irms_control_flow:
1496 case irms_auxiliary:
1497 return snprintf(buf, len, "<TV_OVERFLOW_BAD>");
1504 * Output of tarvals to stdio.
1506 int tarval_printf(tarval *tv) {
1510 res = tarval_snprintf(buf, sizeof(buf), tv);
1511 assert(res < (int) sizeof(buf) && "buffer to small for tarval_snprintf");
1516 char *get_tarval_bitpattern(tarval *tv) {
1518 int n = get_mode_size_bits(tv->mode);
1519 int bytes = (n + 7) / 8;
1520 char *res = xmalloc((n + 1) * sizeof(char));
1523 for(i = 0; i < bytes; i++) {
1524 byte = get_tarval_sub_bits(tv, i);
1525 for(j = 1; j < 256; j <<= 1)
1527 res[pos++] = j & byte ? '1' : '0';
1536 * access to the bitpattern
1538 unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) {
1539 switch (get_mode_arithmetic(tv->mode)) {
1540 case irma_twos_complement:
1541 return sc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
1543 return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
1545 panic("get_tarval_sub_bits(): arithmetic mode not supported");
1550 * Specify the output options of one mode.
1552 * This functions stores the modinfo, so DO NOT DESTROY it.
1554 * Returns zero on success.
1556 int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo) {
1559 mode->tv_priv = modeinfo;
1564 * Returns the output options of one mode.
1566 * This functions returns the mode info of a given mode.
1568 const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) {
1571 return mode->tv_priv;
1575 * Identifying tarvals values for algebraic simplifications.
1578 * - TV_CLASSIFY_NULL for additive neutral or the NULL tarval for reference modes,
1579 * - TV_CLASSIFY_ONE for multiplicative neutral,
1580 * - TV_CLASSIFY_ALL_ONE for bitwise-and neutral
1581 * - TV_CLASSIFY_OTHER else
1583 tarval_classification_t classify_tarval(tarval *tv) {
1584 if (!tv || tv == tarval_bad) return TV_CLASSIFY_OTHER;
1586 if (tv == get_mode_null(tv->mode))
1587 return TV_CLASSIFY_NULL;
1588 else if (tv == get_mode_one(tv->mode))
1589 return TV_CLASSIFY_ONE;
1590 else if (tv == get_mode_all_one(tv->mode))
1591 return TV_CLASSIFY_ALL_ONE;
1593 return TV_CLASSIFY_OTHER;
1597 * Returns non-zero if a given (integer) tarval has only one single bit
1600 int tarval_is_single_bit(tarval *tv) {
1604 if (!tv || tv == tarval_bad) return 0;
1605 if (! mode_is_int(tv->mode)) return 0;
1607 l = get_mode_size_bytes(tv->mode);
1608 for (bits = 0, i = l - 1; i >= 0; --i) {
1609 unsigned char v = get_tarval_sub_bits(tv, (unsigned)i);
1611 /* check for more than one bit in these */
1623 * Returns non-zero if the mantissa of a floating point IEEE-754
1624 * tarval is zero (i.e. 1.0Exxx)
1626 int tarval_ieee754_zero_mantissa(tarval *tv) {
1627 assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
1628 return fc_zero_mantissa(tv->value);
1631 /* Returns the exponent of a floating point IEEE-754 tarval. */
1632 int tarval_ieee754_get_exponent(tarval *tv) {
1633 assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
1634 return fc_get_exponent(tv->value);
1637 /* Set the immediate precision for IEEE-754 results. */
1638 unsigned tarval_ieee754_set_immediate_precision(unsigned bits) {
1639 return fc_set_immediate_precision(bits);
1642 /* Returns non-zero if the result of the last IEEE-754 operation was exact. */
1643 unsigned tarval_ieee754_get_exact(void) {
1644 return fc_is_exact();
1648 * Sets the overflow mode for integer operations.
1650 void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) {
1651 int_overflow_mode = ov_mode;
1654 /* Get the overflow mode for integer operations. */
1655 tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void) {
1656 return int_overflow_mode;
1659 /* Enable/Disable floating point constant folding. */
1660 int tarval_enable_fp_ops(int enable) {
1661 int old = !no_float;
1668 * default mode_info for output as HEX
1670 static const tarval_mode_info hex_output = {
1677 * Initialization of the tarval module: called before init_mode()
1679 void init_tarval_1(long null_value) {
1680 _null_value = null_value;
1682 /* initialize the sets holding the tarvals with a comparison function and
1683 * an initial size, which is the expected number of constants */
1684 tarvals = new_set(memcmp, N_CONSTANTS);
1685 values = new_set(memcmp, N_CONSTANTS);
1686 /* init strcalc with precision of 68 to support floating point values with 64
1687 * bit mantissa (needs extra bits for rounding and overflow) */
1693 * Initialization of the tarval module: called after init_mode()
1695 void init_tarval_2(void) {
1696 tarval_bad->kind = k_tarval;
1697 tarval_bad->mode = mode_BAD;
1698 tarval_bad->value = INT_TO_PTR(resid_tarval_bad);
1700 tarval_undefined->kind = k_tarval;
1701 tarval_undefined->mode = mode_ANY;
1702 tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined);
1704 tarval_b_true->kind = k_tarval;
1705 tarval_b_true->mode = mode_b;
1706 tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true);
1708 tarval_b_false->kind = k_tarval;
1709 tarval_b_false->mode = mode_b;
1710 tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false);
1713 * assign output modes that are compatible with the
1714 * old implementation: Hex output
1716 set_tarval_mode_output_option(mode_Bs, &hex_output);
1717 set_tarval_mode_output_option(mode_Bu, &hex_output);
1718 set_tarval_mode_output_option(mode_Hs, &hex_output);
1719 set_tarval_mode_output_option(mode_Hu, &hex_output);
1720 set_tarval_mode_output_option(mode_Is, &hex_output);
1721 set_tarval_mode_output_option(mode_Iu, &hex_output);
1722 set_tarval_mode_output_option(mode_Ls, &hex_output);
1723 set_tarval_mode_output_option(mode_Lu, &hex_output);
1724 set_tarval_mode_output_option(mode_P, &hex_output);
1727 /* free all memory occupied by tarval. */
1728 void finish_tarval(void) {
1731 del_set(tarvals); tarvals = NULL;
1732 del_set(values); values = NULL;
1735 /****************************************************************************
1737 ****************************************************************************/