2 * Copyright (C) 1995-2008 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.
36 #include <assert.h> /* assertions */
37 #include <stdlib.h> /* atoi() */
40 #include <strings.h> /* strings.h also includes bsd only function strcasecmp */
45 #include "set.h" /* to store tarvals in */
46 #include "entity_t.h" /* needed to store pointers to entities */
48 #include "irnode.h" /* defines boolean return values (pnc_number)*/
53 #include "firm_common.h"
56 /** Size of hash tables. Should correspond to average number of distinct constant
58 #define N_CONSTANTS 2048
60 /* get the integer overflow mode */
61 #define GET_OVERFLOW_MODE() int_overflow_mode
63 /* unused, float to int doesn't work yet */
64 enum float_to_int_mode {
69 #define GET_FLOAT_TO_INT_MODE() TRUNCATE
71 #define SWITCH_NOINFINITY 0
72 #define SWITCH_NODENORMALS 0
74 /****************************************************************************
75 * local definitions and macros
76 ****************************************************************************/
78 # define TARVAL_VERIFY(a) tarval_verify((a))
80 # define TARVAL_VERIFY(a) ((void)0)
83 #define INSERT_TARVAL(tv) ((tarval*)set_insert(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
84 #define FIND_TARVAL(tv) ((tarval*)set_find(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
86 #define INSERT_VALUE(val, size) (set_insert(values, (val), size, hash_val((val), size)))
87 #define FIND_VALUE(val, size) (set_find(values, (val), size, hash_val((val), size)))
89 #define fail_verify(a) _fail_verify((a), __FILE__, __LINE__)
91 /** A set containing all existing tarvals. */
92 static struct set *tarvals = NULL;
93 /** A set containing all existing values. */
94 static struct set *values = NULL;
96 /** The carry flag for SOME operations. -1 means UNDEFINED here */
97 static int carry_flag = -1;
99 /** The integer overflow mode. */
100 static tarval_int_overflow_mode_t int_overflow_mode = TV_OVERFLOW_WRAP;
102 /** if this is set non-zero, the constant folding for floating point is OFF */
103 static int no_float = 0;
105 /** IEEE-754r half precision */
106 static const ieee_descriptor_t half_desc = { 5, 10, 0, NORMAL };
107 /** IEEE-754 single precision */
108 static const ieee_descriptor_t single_desc = { 8, 23, 0, NORMAL };
109 /** IEEE-754 double precision */
110 static const ieee_descriptor_t double_desc = { 11, 52, 0, NORMAL };
111 /** Intel x87 extended precision */
112 static const ieee_descriptor_t extended_desc = { 15, 63, 1, NORMAL };
114 /** IEEE-754r quad precision */
115 static const ieee_descriptor_t quad_desc = { 15, 112, 0, NORMAL };
117 /****************************************************************************
119 ****************************************************************************/
121 static int hash_val(const void *value, unsigned int length);
122 static int hash_tv(tarval *tv);
123 static void _fail_verify(tarval *tv, const char* file, int line)
125 /* print a memory image of the tarval and throw an assertion */
127 panic("%s:%d: Invalid tarval: mode: %F\n value: [%p]", file, line, tv->mode, tv->value);
129 panic("%s:%d: Invalid tarval (null)", file, line);
132 inline static void tarval_verify(tarval *tv) __attribute__ ((unused));
135 inline static void tarval_verify(tarval *tv)
141 if ((tv == tarval_bad) || (tv == tarval_undefined)) return;
142 if ((tv == tarval_b_true) || (tv == tarval_b_false)) return;
144 if (!FIND_TARVAL(tv)) fail_verify(tv);
145 if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv);
149 /** Hash a tarval. */
150 static int hash_tv(tarval *tv) {
151 return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length;
154 /** Hash a value. Treat it as a byte array. */
155 static int hash_val(const void *value, unsigned int length) {
157 unsigned int hash = 0;
159 /* scramble the byte - array */
160 for (i = 0; i < length; ++i) {
161 hash += (hash << 5) ^ (hash >> 27) ^ ((char*)value)[i];
162 hash += (hash << 11) ^ (hash >> 17);
168 static int cmp_tv(const void *p1, const void *p2, size_t n) {
169 const tarval *tv1 = p1;
170 const tarval *tv2 = p2;
173 assert(tv1->kind == k_tarval);
174 assert(tv2->kind == k_tarval);
175 if (tv1->mode < tv2->mode)
177 if (tv1->mode > tv2->mode)
179 if (tv1->length < tv2->length)
181 if (tv1->length > tv2->length)
183 if (tv1->value < tv2->value)
185 if (tv1->value > tv2->value)
191 /** finds tarval with value/mode or creates new tarval */
192 static tarval *get_tarval(const void *value, int length, ir_mode *mode) {
199 /* if there already is such a value, it is returned, else value
200 * is copied into the set */
201 char *temp = alloca(length);
202 memcpy(temp, value, length);
203 if (get_mode_arithmetic(mode) == irma_twos_complement) {
204 sign_extend(temp, mode);
206 tv.value = INSERT_VALUE(temp, length);
210 /* if there is such a tarval, it is returned, else tv is copied
212 return (tarval *)INSERT_TARVAL(&tv);
218 static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
222 switch (get_mode_sort(mode)) {
224 /* addresses always wrap around */
225 temp = alloca(sc_get_buffer_length());
226 memcpy(temp, value, sc_get_buffer_length());
227 sc_truncate(get_mode_size_bits(mode), temp);
228 /* the sc_ module expects that all bits are set ... */
229 sign_extend(temp, mode);
230 return get_tarval(temp, length, mode);
232 case irms_int_number:
233 if (sc_comp(value, get_mode_max(mode)->value) == 1) {
234 switch (GET_OVERFLOW_MODE()) {
235 case TV_OVERFLOW_SATURATE:
236 return get_mode_max(mode);
237 case TV_OVERFLOW_WRAP:
238 temp = alloca(sc_get_buffer_length());
239 memcpy(temp, value, sc_get_buffer_length());
240 sc_truncate(get_mode_size_bits(mode), temp);
241 /* the sc_ module expects that all bits are set ... */
242 sign_extend(temp, mode);
243 return get_tarval(temp, length, mode);
244 case TV_OVERFLOW_BAD:
247 return get_tarval(value, length, mode);
250 if (sc_comp(value, get_mode_min(mode)->value) == -1) {
251 switch (GET_OVERFLOW_MODE()) {
252 case TV_OVERFLOW_SATURATE:
253 return get_mode_min(mode);
254 case TV_OVERFLOW_WRAP: {
255 char *temp = alloca(sc_get_buffer_length());
256 memcpy(temp, value, sc_get_buffer_length());
257 sc_truncate(get_mode_size_bits(mode), temp);
258 return get_tarval(temp, length, mode);
260 case TV_OVERFLOW_BAD:
263 return get_tarval(value, length, mode);
268 case irms_float_number:
269 if (SWITCH_NOINFINITY && fc_is_inf(value)) {
270 /* clip infinity to maximum value */
271 return fc_is_negative(value) ? get_mode_min(mode) : get_mode_max(mode);
274 if (SWITCH_NODENORMALS && fc_is_subnormal(value)) {
275 /* clip denormals to zero */
276 return get_mode_null(mode);
283 return get_tarval(value, length, mode);
287 * public variables declared in tv.h
289 static tarval reserved_tv[6];
291 tarval *tarval_b_false = &reserved_tv[0];
292 tarval *tarval_b_true = &reserved_tv[1];
293 tarval *tarval_bad = &reserved_tv[2];
294 tarval *tarval_undefined = &reserved_tv[3];
295 tarval *tarval_reachable = &reserved_tv[4];
296 tarval *tarval_unreachable = &reserved_tv[5];
299 * get the float descriptor for given mode.
301 static const ieee_descriptor_t *get_descriptor(const ir_mode *mode) {
302 switch (get_mode_size_bits(mode)) {
303 case 16: return &half_desc;
304 case 32: return &single_desc;
305 case 64: return &double_desc;
307 case 96: return &extended_desc;
308 case 128: return &quad_desc;
310 panic("Unsupported mode in get_descriptor()");
316 * public functions declared in tv.h
320 * Constructors =============================================================
322 tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
324 const ieee_descriptor_t *desc;
330 switch (get_mode_sort(mode)) {
331 case irms_control_flow:
334 panic("Unsupported tarval creation with mode %F", mode);
336 case irms_internal_boolean:
337 /* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
338 if (!strcasecmp(str, "true"))
339 return tarval_b_true;
340 else if (!strcasecmp(str, "false"))
341 return tarval_b_false;
343 /* XXX This is C semantics */
344 return atoi(str) ? tarval_b_true : tarval_b_false;
346 case irms_float_number:
347 desc = get_descriptor(mode);
348 fc_val_from_str(str, len, desc, NULL);
349 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
352 if (!strcasecmp(str, "null"))
353 return get_tarval_null(mode);
355 case irms_int_number:
356 sc_val_from_str(str, len, NULL, mode);
357 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
359 panic("Unsupported tarval creation with mode %F", mode);
363 * helper function, create a tarval from long
365 tarval *new_tarval_from_long(long l, ir_mode *mode) {
368 switch (get_mode_sort(mode)) {
369 case irms_internal_boolean:
370 /* XXX C semantics ! */
371 return l ? tarval_b_true : tarval_b_false ;
374 /* same as integer modes */
375 case irms_int_number:
376 sc_val_from_long(l, NULL);
377 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
379 case irms_float_number:
380 return new_tarval_from_double((long double)l, mode);
383 assert(0 && "unsupported mode sort");
388 /* returns non-zero if can be converted to long */
389 int tarval_is_long(tarval *tv) {
390 if (!mode_is_int(tv->mode) && !mode_is_reference(tv->mode))
393 if (get_mode_size_bits(tv->mode) > (int) (sizeof(long) << 3)) {
394 /* the value might be too big to fit in a long */
395 sc_max_from_bits(sizeof(long) << 3, 0, NULL);
396 if (sc_comp(sc_get_buffer(), tv->value) == -1) {
397 /* really doesn't fit */
404 /* this might overflow the machine's long, so use only with small values */
405 long get_tarval_long(tarval* tv) {
406 assert(tarval_is_long(tv) && "tarval too big to fit in long");
408 return sc_val_to_long(tv->value);
411 tarval *new_tarval_from_double(long double d, ir_mode *mode) {
412 const ieee_descriptor_t *desc;
414 assert(mode && (get_mode_sort(mode) == irms_float_number));
415 desc = get_descriptor(mode);
416 fc_val_from_ieee754(d, desc, NULL);
417 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
420 /* returns non-zero if can be converted to double */
421 int tarval_is_double(tarval *tv) {
424 return (get_mode_sort(tv->mode) == irms_float_number);
427 long double get_tarval_double(tarval *tv) {
428 assert(tarval_is_double(tv));
430 return fc_val_to_ieee754(tv->value);
435 * Access routines for tarval fields ========================================
438 /* get the mode of the tarval */
439 ir_mode *(get_tarval_mode)(const tarval *tv) {
440 return _get_tarval_mode(tv);
444 * Special value query functions ============================================
446 * These functions calculate and return a tarval representing the requested
448 * The functions get_mode_{Max,Min,...} return tarvals retrieved from these
449 * functions, but these are stored on initialization of the irmode module and
450 * therefore the irmode functions should be preferred to the functions below.
453 tarval *(get_tarval_bad)(void) {
454 return _get_tarval_bad();
457 tarval *(get_tarval_undefined)(void) {
458 return _get_tarval_undefined();
461 tarval *(get_tarval_b_false)(void) {
462 return _get_tarval_b_false();
465 tarval *(get_tarval_b_true)(void) {
466 return _get_tarval_b_true();
469 tarval *(get_tarval_reachable)(void) {
470 return _get_tarval_reachable();
473 tarval *(get_tarval_unreachable)(void) {
474 return _get_tarval_unreachable();
477 tarval *get_tarval_max(ir_mode *mode) {
478 const ieee_descriptor_t *desc;
481 if (get_mode_n_vector_elems(mode) > 1) {
482 /* vector arithmetic not implemented yet */
486 switch (get_mode_sort(mode)) {
487 case irms_control_flow:
490 panic("mode %F does not support maximum value", mode);
492 case irms_internal_boolean:
493 return tarval_b_true;
495 case irms_float_number:
496 desc = get_descriptor(mode);
497 fc_get_max(desc, NULL);
498 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
501 case irms_int_number:
502 sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
503 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
508 tarval *get_tarval_min(ir_mode *mode) {
509 const ieee_descriptor_t *desc;
512 if (get_mode_n_vector_elems(mode) > 1) {
513 /* vector arithmetic not implemented yet */
517 switch (get_mode_sort(mode)) {
518 case irms_control_flow:
521 panic("mode %F does not support minimum value", mode);
523 case irms_internal_boolean:
524 return tarval_b_false;
526 case irms_float_number:
527 desc = get_descriptor(mode);
528 fc_get_min(desc, NULL);
529 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
532 case irms_int_number:
533 sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
534 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
539 /** The bit pattern for the pointer NULL */
540 static long _null_value = 0;
542 tarval *get_tarval_null(ir_mode *mode) {
545 if (get_mode_n_vector_elems(mode) > 1) {
546 /* vector arithmetic not implemented yet */
550 switch (get_mode_sort(mode)) {
551 case irms_control_flow:
554 panic("mode %F does not support null value", mode);
556 case irms_float_number:
557 return new_tarval_from_double(0.0, mode);
559 case irms_internal_boolean:
560 case irms_int_number:
561 return new_tarval_from_long(0l, mode);
564 return new_tarval_from_long(_null_value, mode);
569 tarval *get_tarval_one(ir_mode *mode) {
572 if (get_mode_n_vector_elems(mode) > 1)
573 panic("vector arithmetic not implemented yet");
575 switch (get_mode_sort(mode)) {
576 case irms_control_flow:
579 panic("mode %F does not support one value", mode);
581 case irms_internal_boolean:
582 return tarval_b_true;
584 case irms_float_number:
585 return new_tarval_from_double(1.0, mode);
588 case irms_int_number:
589 return new_tarval_from_long(1l, mode);
594 tarval *get_tarval_all_one(ir_mode *mode) {
597 if (get_mode_n_vector_elems(mode) > 1)
598 panic("vector arithmetic not implemented yet");
600 switch (get_mode_sort(mode)) {
601 case irms_control_flow:
604 panic("mode %F does not support all-one value", mode);
606 case irms_int_number:
607 case irms_internal_boolean:
609 return tarval_not(get_mode_null(mode));
612 case irms_float_number:
613 return new_tarval_from_double(1.0, mode);
618 int tarval_is_constant(tarval *tv) {
619 int num_res = sizeof(reserved_tv) / sizeof(reserved_tv[0]);
621 /* reserved tarvals are NOT constants. Note that although
622 tarval_b_true and tarval_b_false are reserved, they are constants of course. */
623 return (tv < &reserved_tv[2] || tv > &reserved_tv[num_res - 1]);
626 tarval *get_tarval_minus_one(ir_mode *mode) {
629 if (get_mode_n_vector_elems(mode) > 1)
630 panic("vector arithmetic not implemented yet");
632 switch (get_mode_sort(mode)) {
633 case irms_control_flow:
636 case irms_internal_boolean:
637 panic("mode %F does not support minus one value", mode);
642 case irms_float_number:
643 return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad;
645 case irms_int_number:
646 return new_tarval_from_long(-1l, mode);
651 tarval *get_tarval_nan(ir_mode *mode) {
652 const ieee_descriptor_t *desc;
655 if (get_mode_n_vector_elems(mode) > 1)
656 panic("vector arithmetic not implemented yet");
658 if (get_mode_sort(mode) == irms_float_number) {
659 desc = get_descriptor(mode);
660 fc_get_qnan(desc, NULL);
661 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
663 panic("mode %F does not support NaN value", mode);
666 tarval *get_tarval_plus_inf(ir_mode *mode) {
668 if (get_mode_n_vector_elems(mode) > 1)
669 panic("vector arithmetic not implemented yet");
671 if (get_mode_sort(mode) == irms_float_number) {
672 const ieee_descriptor_t *desc = get_descriptor(mode);
673 fc_get_plusinf(desc, NULL);
674 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
676 panic("mode %F does not support +inf value", mode);
679 tarval *get_tarval_minus_inf(ir_mode *mode) {
682 if (get_mode_n_vector_elems(mode) > 1)
683 panic("vector arithmetic not implemented yet");
685 if (get_mode_sort(mode) == irms_float_number) {
686 const ieee_descriptor_t *desc = get_descriptor(mode);
687 fc_get_minusinf(desc, NULL);
688 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
690 panic("mode %F does not support -inf value", mode);
694 * Arithmetic operations on tarvals ========================================
698 * test if negative number, 1 means 'yes'
700 int tarval_is_negative(tarval *a) {
701 if (get_mode_n_vector_elems(a->mode) > 1)
702 panic("vector arithmetic not implemented yet");
704 switch (get_mode_sort(a->mode)) {
705 case irms_int_number:
706 if (!mode_is_signed(a->mode)) return 0;
708 return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
710 case irms_float_number:
711 return fc_is_negative(a->value);
714 panic("mode %F does not support negation value", a->mode);
719 * test if null, 1 means 'yes'
721 int tarval_is_null(tarval *a) {
724 a == get_mode_null(get_tarval_mode(a));
728 * test if one, 1 means 'yes'
730 int tarval_is_one(tarval *a) {
733 a == get_mode_one(get_tarval_mode(a));
736 int tarval_is_all_one(tarval *tv) {
739 tv == get_mode_all_one(get_tarval_mode(tv));
743 * test if one, 1 means 'yes'
745 int tarval_is_minus_one(tarval *a) {
748 a == get_mode_minus_one(get_tarval_mode(a));
754 pn_Cmp tarval_cmp(tarval *a, tarval *b) {
757 if (a == tarval_bad || b == tarval_bad) {
758 panic("Comparison with tarval_bad");
762 if (a == tarval_undefined || b == tarval_undefined)
765 if (a->mode != b->mode)
768 if (get_mode_n_vector_elems(a->mode) > 1) {
769 /* vector arithmetic not implemented yet */
770 assert(0 && "cmp not implemented for vector modes");
773 /* Here the two tarvals are unequal and of the same mode */
774 switch (get_mode_sort(a->mode)) {
775 case irms_control_flow:
782 case irms_float_number:
783 /* it should be safe to enable this even if other arithmetic is disabled */
785 return pn_Cmp_False;*/
787 * BEWARE: we cannot compare a == b here, because
788 * a NaN is always Unordered to any other value, even to itself!
790 switch (fc_comp(a->value, b->value)) {
791 case -1: return pn_Cmp_Lt;
792 case 0: return pn_Cmp_Eq;
793 case 1: return pn_Cmp_Gt;
794 case 2: return pn_Cmp_Uo;
795 default: return pn_Cmp_False;
798 case irms_int_number:
801 return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt;
803 case irms_internal_boolean:
806 return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt;
812 * convert to other mode
814 tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
817 const ieee_descriptor_t *desc;
824 if (src->mode == dst_mode)
827 if (get_mode_n_vector_elems(src->mode) > 1) {
828 /* vector arithmetic not implemented yet */
832 switch (get_mode_sort(src->mode)) {
833 case irms_control_flow:
838 /* cast float to something */
839 case irms_float_number:
840 switch (get_mode_sort(dst_mode)) {
841 case irms_float_number:
842 desc = get_descriptor(dst_mode);
843 fc_cast(src->value, desc, NULL);
844 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
846 case irms_int_number:
847 switch (GET_FLOAT_TO_INT_MODE()) {
849 res = fc_int(src->value, NULL);
852 res = fc_rnd(src->value, NULL);
855 panic("Unsupported float to int conversion mode in tarval_convert_to()");
858 buffer = alloca(sc_get_buffer_length());
859 if (! fc_flt2int(res, buffer, dst_mode))
861 return get_tarval(buffer, sc_get_buffer_length(), dst_mode);
864 /* the rest can't be converted */
869 /* cast int/characters to something */
870 case irms_int_number:
871 switch (get_mode_sort(dst_mode)) {
874 case irms_int_number:
875 buffer = alloca(sc_get_buffer_length());
876 memcpy(buffer, src->value, sc_get_buffer_length());
877 sign_extend(buffer, dst_mode);
878 return get_tarval_overflow(buffer, src->length, dst_mode);
880 case irms_internal_boolean:
881 /* XXX C semantics */
882 if (src == get_mode_null(src->mode)) return tarval_b_false;
883 else return tarval_b_true;
885 case irms_float_number:
886 /* XXX floating point unit does not understand internal integer
887 * representation, convert to string first, then create float from
889 buffer = alloca(100);
890 /* decimal string representation because hexadecimal output is
891 * interpreted unsigned by fc_val_from_str, so this is a HACK */
892 snprintf(buffer, 100, "%s",
893 sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC, mode_is_signed(src->mode)));
894 buffer[100 - 1] = '\0';
895 desc = get_descriptor(dst_mode);
896 fc_val_from_str(buffer, 0, desc, NULL);
897 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
904 case irms_internal_boolean:
905 /* beware: this is C semantic for the INTERNAL boolean mode */
906 if (get_mode_sort(dst_mode) == irms_int_number)
907 return src == tarval_b_true ? get_mode_one(dst_mode) : get_mode_null(dst_mode);
911 if (get_mode_sort(dst_mode) == irms_int_number) {
912 buffer = alloca(sc_get_buffer_length());
913 memcpy(buffer, src->value, sc_get_buffer_length());
914 sign_extend(buffer, src->mode);
915 return get_tarval_overflow(buffer, src->length, dst_mode);
926 tarval *tarval_not(tarval *a) {
931 /* works for vector mode without changes */
933 switch (get_mode_sort(a->mode)) {
935 case irms_int_number:
936 buffer = alloca(sc_get_buffer_length());
937 sc_not(a->value, buffer);
938 return get_tarval(buffer, a->length, a->mode);
940 case irms_internal_boolean:
941 if (a == tarval_b_true)
942 return tarval_b_false;
943 if (a == tarval_b_false)
944 return tarval_b_true;
948 assert(0 && "bitwise negation is only allowed for integer and boolean");
954 * arithmetic negation
956 tarval *tarval_neg(tarval *a) {
959 assert(mode_is_num(a->mode)); /* negation only for numerical values */
963 /* note: negation is allowed even for unsigned modes. */
965 if (get_mode_n_vector_elems(a->mode) > 1) {
966 /* vector arithmetic not implemented yet */
970 switch (get_mode_sort(a->mode)) {
971 case irms_int_number:
972 buffer = alloca(sc_get_buffer_length());
973 sc_neg(a->value, buffer);
974 return get_tarval_overflow(buffer, a->length, a->mode);
976 case irms_float_number:
977 /* it should be safe to enable this even if other arithmetic is disabled */
981 fc_neg(a->value, NULL);
982 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
992 tarval *tarval_add(tarval *a, tarval *b) {
997 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
998 /* vector arithmetic not implemented yet */
1002 if (mode_is_reference(a->mode) && a->mode != b->mode) {
1003 b = tarval_convert_to(b, a->mode);
1004 } else if (mode_is_reference(b->mode) && b->mode != a->mode) {
1005 a = tarval_convert_to(a, b->mode);
1008 assert(a->mode == b->mode);
1010 switch (get_mode_sort(a->mode)) {
1011 case irms_reference:
1012 case irms_int_number:
1013 /* modes of a,b are equal, so result has mode of a as this might be the character */
1014 buffer = alloca(sc_get_buffer_length());
1015 sc_add(a->value, b->value, buffer);
1016 carry_flag = sc_get_bit_at(buffer, get_mode_size_bits(a->mode));
1017 return get_tarval_overflow(buffer, a->length, a->mode);
1019 case irms_float_number:
1023 fc_add(a->value, b->value, NULL);
1024 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1034 tarval *tarval_sub(tarval *a, tarval *b, ir_mode *dst_mode) {
1039 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
1040 /* vector arithmetic not implemented yet */
1044 if (dst_mode != NULL) {
1045 if (a->mode != dst_mode)
1046 a = tarval_convert_to(a, dst_mode);
1047 if (b->mode != dst_mode)
1048 b = tarval_convert_to(b, dst_mode);
1050 assert(a->mode == b->mode);
1052 switch (get_mode_sort(a->mode)) {
1053 case irms_reference:
1054 case irms_int_number:
1055 /* modes of a,b are equal, so result has mode of a as this might be the character */
1056 buffer = alloca(sc_get_buffer_length());
1057 sc_sub(a->value, b->value, buffer);
1058 carry_flag = sc_get_bit_at(buffer, get_mode_size_bits(a->mode));
1059 return get_tarval_overflow(buffer, a->length, a->mode);
1061 case irms_float_number:
1065 fc_sub(a->value, b->value, NULL);
1066 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1076 tarval *tarval_mul(tarval *a, tarval *b) {
1079 assert(a->mode == b->mode);
1083 if (get_mode_n_vector_elems(a->mode) > 1) {
1084 /* vector arithmetic not implemented yet */
1088 switch (get_mode_sort(a->mode)) {
1089 case irms_int_number:
1090 /* modes of a,b are equal */
1091 buffer = alloca(sc_get_buffer_length());
1092 sc_mul(a->value, b->value, buffer);
1093 return get_tarval_overflow(buffer, a->length, a->mode);
1095 case irms_float_number:
1099 fc_mul(a->value, b->value, NULL);
1100 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1108 * floating point division
1110 tarval *tarval_quo(tarval *a, tarval *b) {
1111 assert((a->mode == b->mode) && mode_is_float(a->mode));
1118 if (get_mode_n_vector_elems(a->mode) > 1) {
1119 /* vector arithmetic not implemented yet */
1123 fc_div(a->value, b->value, NULL);
1124 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1129 * overflow is impossible, but look out for division by zero
1131 tarval *tarval_div(tarval *a, tarval *b) {
1132 assert((a->mode == b->mode) && mode_is_int(a->mode));
1136 if (get_mode_n_vector_elems(a->mode) > 1) {
1137 /* vector arithmetic not implemented yet */
1142 if (b == get_mode_null(b->mode)) return tarval_bad;
1143 /* modes of a,b are equal */
1144 sc_div(a->value, b->value, NULL);
1145 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1150 * overflow is impossible, but look out for division by zero
1152 tarval *tarval_mod(tarval *a, tarval *b) {
1153 assert((a->mode == b->mode) && mode_is_int(a->mode));
1157 if (get_mode_n_vector_elems(a->mode) > 1) {
1158 /* vector arithmetic not implemented yet */
1163 if (b == get_mode_null(b->mode)) return tarval_bad;
1164 /* modes of a,b are equal */
1165 sc_mod(a->value, b->value, NULL);
1166 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1170 * integer division AND remainder
1171 * overflow is impossible, but look out for division by zero
1173 tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
1174 int len = sc_get_buffer_length();
1175 char *div_res = alloca(len);
1176 char *mod_res = alloca(len);
1178 assert((a->mode == b->mode) && mode_is_int(a->mode));
1182 if (get_mode_n_vector_elems(a->mode) > 1) {
1183 /* vector arithmetic not implemented yet */
1189 if (b == get_mode_null(b->mode)) return tarval_bad;
1190 /* modes of a,b are equal */
1191 sc_divmod(a->value, b->value, div_res, mod_res);
1192 *mod = get_tarval(mod_res, len, a->mode);
1193 return get_tarval(div_res, len, a->mode);
1199 tarval *tarval_abs(tarval *a) {
1203 assert(mode_is_num(a->mode));
1205 if (get_mode_n_vector_elems(a->mode) > 1) {
1206 /* vector arithmetic not implemented yet */
1210 switch (get_mode_sort(a->mode)) {
1211 case irms_int_number:
1212 if (sc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
1213 buffer = alloca(sc_get_buffer_length());
1214 sc_neg(a->value, buffer);
1215 return get_tarval_overflow(buffer, a->length, a->mode);
1219 case irms_float_number:
1220 /* it should be safe to enable this even if other arithmetic is disabled */
1222 return tarval_bad;*/
1224 if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
1225 fc_neg(a->value, NULL);
1226 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1239 tarval *tarval_and(tarval *a, tarval *b) {
1240 assert(a->mode == b->mode);
1242 /* works even for vector modes */
1245 switch (get_mode_sort(a->mode)) {
1246 case irms_internal_boolean:
1247 return (a == tarval_b_false) ? a : b;
1249 case irms_int_number:
1250 sc_and(a->value, b->value, NULL);
1251 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1254 assert(0 && "operation not defined on mode");
1262 tarval *tarval_or(tarval *a, tarval *b) {
1263 assert(a->mode == b->mode);
1265 /* works even for vector modes */
1268 switch (get_mode_sort(a->mode)) {
1269 case irms_internal_boolean:
1270 return (a == tarval_b_true) ? a : b;
1272 case irms_int_number:
1273 sc_or(a->value, b->value, NULL);
1274 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1277 assert(0 && "operation not defined on mode");
1283 * bitwise exclusive or (xor)
1285 tarval *tarval_eor(tarval *a, tarval *b) {
1286 assert((a->mode == b->mode));
1288 /* works even for vector modes */
1291 switch (get_mode_sort(a->mode)) {
1292 case irms_internal_boolean:
1293 return (a == b)? tarval_b_false : tarval_b_true;
1295 case irms_int_number:
1296 sc_xor(a->value, b->value, NULL);
1297 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1300 assert(0 && "operation not defined on mode");
1306 * bitwise left shift
1308 tarval *tarval_shl(tarval *a, tarval *b) {
1309 char *temp_val = NULL;
1311 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1315 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1316 /* vector arithmetic not implemented yet */
1320 if (get_mode_modulo_shift(a->mode) != 0) {
1321 temp_val = alloca(sc_get_buffer_length());
1323 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1324 sc_mod(b->value, temp_val, temp_val);
1326 temp_val = (char*)b->value;
1328 sc_shl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1329 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1333 * bitwise unsigned right shift
1335 tarval *tarval_shr(tarval *a, tarval *b) {
1336 char *temp_val = NULL;
1338 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1342 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1343 /* vector arithmetic not implemented yet */
1347 if (get_mode_modulo_shift(a->mode) != 0) {
1348 temp_val = alloca(sc_get_buffer_length());
1350 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1351 sc_mod(b->value, temp_val, temp_val);
1353 temp_val = (char*)b->value;
1355 sc_shr(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1356 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1360 * bitwise signed right shift
1362 tarval *tarval_shrs(tarval *a, tarval *b) {
1363 char *temp_val = NULL;
1365 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1369 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1370 /* vector arithmetic not implemented yet */
1374 if (get_mode_modulo_shift(a->mode) != 0) {
1375 temp_val = alloca(sc_get_buffer_length());
1377 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1378 sc_mod(b->value, temp_val, temp_val);
1380 temp_val = (char*)b->value;
1382 sc_shrs(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1383 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1387 * bitwise rotation to left
1389 tarval *tarval_rotl(tarval *a, tarval *b) {
1390 char *temp_val = NULL;
1392 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1396 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1397 /* vector arithmetic not implemented yet */
1401 if (get_mode_modulo_shift(a->mode) != 0) {
1402 temp_val = alloca(sc_get_buffer_length());
1404 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1405 sc_mod(b->value, temp_val, temp_val);
1407 temp_val = (char*)b->value;
1409 sc_rotl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1410 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1414 * carry flag of the last operation
1416 int tarval_carry(void) {
1417 if (carry_flag == -1)
1418 panic("Carry undefined for the last operation");
1425 int tarval_snprintf(char *buf, size_t len, tarval *tv) {
1426 static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL };
1430 const tarval_mode_info *mode_info;
1431 const char *prefix, *suffix;
1433 mode_info = tv->mode->tv_priv;
1435 mode_info = &default_info;
1436 prefix = mode_info->mode_prefix ? mode_info->mode_prefix : "";
1437 suffix = mode_info->mode_suffix ? mode_info->mode_suffix : "";
1439 switch (get_mode_sort(tv->mode)) {
1440 case irms_reference:
1441 if (tv == tv->mode->null) return snprintf(buf, len, "NULL");
1443 case irms_int_number:
1444 switch (mode_info->mode_output) {
1447 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_DEC, mode_is_signed(tv->mode));
1451 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT, 0);
1458 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX, 0);
1461 return snprintf(buf, len, "%s%s%s", prefix, str, suffix);
1463 case irms_float_number:
1464 switch (mode_info->mode_output) {
1466 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_PACKED), suffix);
1469 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_HEX), suffix);
1474 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_DEC), suffix);
1478 case irms_internal_boolean:
1479 switch (mode_info->mode_output) {
1485 return snprintf(buf, len, "%s%c%s", prefix, (tv == tarval_b_true) ? '1' : '0', suffix);
1489 return snprintf(buf, len, "%s%s%s", prefix, (tv == tarval_b_true) ? "true" : "false", suffix);
1492 case irms_control_flow:
1494 case irms_auxiliary:
1495 if (tv == tarval_bad)
1496 return snprintf(buf, len, "<TV_BAD>");
1497 if (tv == tarval_undefined)
1498 return snprintf(buf, len, "<TV_UNDEF>");
1499 if (tv == tarval_unreachable)
1500 return snprintf(buf, len, "<TV_UNREACHABLE>");
1501 if (tv == tarval_reachable)
1502 return snprintf(buf, len, "<TV_REACHABLE>");
1503 return snprintf(buf, len, "<TV_??""?>");
1510 * Output of tarvals to stdio.
1512 int tarval_printf(tarval *tv) {
1516 res = tarval_snprintf(buf, sizeof(buf), tv);
1517 assert(res < (int) sizeof(buf) && "buffer to small for tarval_snprintf");
1522 char *get_tarval_bitpattern(tarval *tv) {
1524 int n = get_mode_size_bits(tv->mode);
1525 int bytes = (n + 7) / 8;
1526 char *res = XMALLOCN(char, n + 1);
1529 for(i = 0; i < bytes; i++) {
1530 byte = get_tarval_sub_bits(tv, i);
1531 for(j = 1; j < 256; j <<= 1)
1533 res[pos++] = j & byte ? '1' : '0';
1542 * access to the bitpattern
1544 unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) {
1545 switch (get_mode_arithmetic(tv->mode)) {
1546 case irma_twos_complement:
1547 return sc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
1549 return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
1551 panic("get_tarval_sub_bits(): arithmetic mode not supported");
1556 * Specify the output options of one mode.
1558 * This functions stores the modinfo, so DO NOT DESTROY it.
1560 * Returns zero on success.
1562 int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo) {
1565 mode->tv_priv = modeinfo;
1570 * Returns the output options of one mode.
1572 * This functions returns the mode info of a given mode.
1574 const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode) {
1577 return mode->tv_priv;
1581 * Returns non-zero if a given (integer) tarval has only one single bit
1584 int tarval_is_single_bit(tarval *tv) {
1588 if (!tv || tv == tarval_bad) return 0;
1589 if (! mode_is_int(tv->mode)) return 0;
1591 l = get_mode_size_bytes(tv->mode);
1592 for (bits = 0, i = l - 1; i >= 0; --i) {
1593 unsigned char v = get_tarval_sub_bits(tv, (unsigned)i);
1595 /* check for more than one bit in these */
1607 * Returns non-zero if the mantissa of a floating point IEEE-754
1608 * tarval is zero (i.e. 1.0Exxx)
1610 int tarval_ieee754_zero_mantissa(tarval *tv) {
1611 assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
1612 return fc_zero_mantissa(tv->value);
1615 /* Returns the exponent of a floating point IEEE-754 tarval. */
1616 int tarval_ieee754_get_exponent(tarval *tv) {
1617 assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
1618 return fc_get_exponent(tv->value);
1622 * Check if the tarval can be converted to the given mode without
1625 int tarval_ieee754_can_conv_lossless(tarval *tv, ir_mode *mode) {
1626 const ieee_descriptor_t *desc = get_descriptor(mode);
1627 return fc_can_lossless_conv_to(tv->value, desc);
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();
1640 /* Return the size of the mantissa in bits (including possible
1641 implicit bits) for the given mode. */
1642 unsigned tarval_ieee754_get_mantissa_size(const ir_mode *mode) {
1643 const ieee_descriptor_t *desc;
1645 assert(get_mode_arithmetic(mode) == irma_ieee754);
1646 desc = get_descriptor(mode);
1648 return desc->mantissa_size + desc->explicit_one;
1651 /* check if its the a floating point NaN */
1652 int tarval_is_NaN(tarval *tv) {
1653 if (! mode_is_float(tv->mode))
1655 return fc_is_nan(tv->value);
1658 /* check if its the a floating point +inf */
1659 int tarval_is_plus_inf(tarval *tv) {
1660 if (! mode_is_float(tv->mode))
1662 return fc_is_inf(tv->value) && !fc_is_negative(tv->value);
1665 /* check if its the a floating point -inf */
1666 int tarval_is_minus_inf(tarval *tv) {
1667 if (! mode_is_float(tv->mode))
1669 return fc_is_inf(tv->value) && fc_is_negative(tv->value);
1672 /* check if the tarval represents a finite value */
1673 int tarval_is_finite(tarval *tv) {
1674 if (mode_is_float(tv->mode))
1675 return !fc_is_nan(tv->value) && !fc_is_inf(tv->value);
1680 * Sets the overflow mode for integer operations.
1682 void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) {
1683 int_overflow_mode = ov_mode;
1686 /* Get the overflow mode for integer operations. */
1687 tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void) {
1688 return int_overflow_mode;
1691 /* Enable/Disable floating point constant folding. */
1692 void tarval_enable_fp_ops(int enable) {
1696 int tarval_fp_ops_enabled(void) {
1701 * default mode_info for output as HEX
1703 static const tarval_mode_info hex_output = {
1710 * Initialization of the tarval module: called before init_mode()
1712 void init_tarval_1(long null_value, int support_quad_precision) {
1713 /* if these assertion fail, tarval_is_constant() will follow ... */
1714 assert(tarval_b_false == &reserved_tv[0] && "b_false MUST be the first reserved tarval!");
1715 assert(tarval_b_true == &reserved_tv[1] && "b_true MUST be the second reserved tarval!");
1717 _null_value = null_value;
1719 /* initialize the sets holding the tarvals with a comparison function and
1720 * an initial size, which is the expected number of constants */
1721 tarvals = new_set(cmp_tv, N_CONSTANTS);
1722 values = new_set(memcmp, N_CONSTANTS);
1723 /* calls init_strcalc() with needed size */
1724 init_fltcalc(support_quad_precision ? 112 : 64);
1728 * Initialization of the tarval module: called after init_mode()
1730 void init_tarval_2(void) {
1731 tarval_bad->kind = k_tarval;
1732 tarval_bad->mode = mode_BAD;
1733 tarval_bad->value = INT_TO_PTR(resid_tarval_bad);
1735 tarval_undefined->kind = k_tarval;
1736 tarval_undefined->mode = mode_ANY;
1737 tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined);
1739 tarval_b_true->kind = k_tarval;
1740 tarval_b_true->mode = mode_b;
1741 tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true);
1743 tarval_b_false->kind = k_tarval;
1744 tarval_b_false->mode = mode_b;
1745 tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false);
1747 tarval_unreachable->kind = k_tarval;
1748 tarval_unreachable->mode = mode_X;
1749 tarval_unreachable->value = INT_TO_PTR(resid_tarval_unreachable);
1751 tarval_reachable->kind = k_tarval;
1752 tarval_reachable->mode = mode_X;
1753 tarval_reachable->value = INT_TO_PTR(resid_tarval_reachable);
1756 * assign output modes that are compatible with the
1757 * old implementation: Hex output
1759 set_tarval_mode_output_option(mode_Bs, &hex_output);
1760 set_tarval_mode_output_option(mode_Bu, &hex_output);
1761 set_tarval_mode_output_option(mode_Hs, &hex_output);
1762 set_tarval_mode_output_option(mode_Hu, &hex_output);
1763 set_tarval_mode_output_option(mode_Is, &hex_output);
1764 set_tarval_mode_output_option(mode_Iu, &hex_output);
1765 set_tarval_mode_output_option(mode_Ls, &hex_output);
1766 set_tarval_mode_output_option(mode_Lu, &hex_output);
1767 set_tarval_mode_output_option(mode_P, &hex_output);
1770 /* free all memory occupied by tarval. */
1771 void finish_tarval(void) {
1774 del_set(tarvals); tarvals = NULL;
1775 del_set(values); values = NULL;
1778 int (is_tarval)(const void *thing) {
1779 return _is_tarval(thing);
1782 /****************************************************************************
1784 ****************************************************************************/