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() */
39 # include <string.h> /* nice things for strings */
42 #include <strings.h> /* strings.h also includes bsd only function strcasecmp */
49 #include "set.h" /* to store tarvals in */
50 #include "entity_t.h" /* needed to store pointers to entities */
52 #include "irnode.h" /* defines boolean return values (pnc_number)*/
57 #include "firm_common.h"
60 /** Size of hash tables. Should correspond to average number of distinct constant
62 #define N_CONSTANTS 2048
64 /* get the integer overflow mode */
65 #define GET_OVERFLOW_MODE() int_overflow_mode
67 /* unused, float to int doesn't work yet */
68 enum float_to_int_mode {
73 #define GET_FLOAT_TO_INT_MODE() TRUNCATE
75 #define SWITCH_NOINFINITY 0
76 #define SWITCH_NODENORMALS 0
78 /****************************************************************************
79 * local definitions and macros
80 ****************************************************************************/
82 # define TARVAL_VERIFY(a) tarval_verify((a))
84 # define TARVAL_VERIFY(a) ((void)0)
87 #define INSERT_TARVAL(tv) ((tarval*)set_insert(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
88 #define FIND_TARVAL(tv) ((tarval*)set_find(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
90 #define INSERT_VALUE(val, size) (set_insert(values, (val), size, hash_val((val), size)))
91 #define FIND_VALUE(val, size) (set_find(values, (val), size, hash_val((val), size)))
93 #define fail_verify(a) _fail_verify((a), __FILE__, __LINE__)
95 /** A set containing all existing tarvals. */
96 static struct set *tarvals = NULL;
97 /** A set containing all existing values. */
98 static struct set *values = NULL;
100 /** The integer overflow mode. */
101 static tarval_int_overflow_mode_t int_overflow_mode = TV_OVERFLOW_WRAP;
103 /** if this is set non-zero, the constant folding for floating point is OFF */
104 static int no_float = 0;
106 /** IEEE-754r half precision */
107 static const ieee_descriptor_t half_desc = { 5, 10, 0, NORMAL };
108 /** IEEE-754 single precision */
109 static const ieee_descriptor_t single_desc = { 8, 23, 0, NORMAL };
110 /** IEEE-754 double precision */
111 static const ieee_descriptor_t double_desc = { 11, 52, 0, NORMAL };
112 /** Intel x87 extended precision */
113 static const ieee_descriptor_t extended_desc = { 15, 63, 1, NORMAL };
115 /** IEEE-754r quad precision */
116 static const ieee_descriptor_t quad_desc = { 15, 112, 0, NORMAL };
118 /****************************************************************************
120 ****************************************************************************/
122 static int hash_val(const void *value, unsigned int length);
123 static int hash_tv(tarval *tv);
124 static void _fail_verify(tarval *tv, const char* file, int line)
126 /* print a memory image of the tarval and throw an assertion */
128 panic("%s:%d: Invalid tarval: mode: %F\n value: [%p]", file, line, tv->mode, tv->value);
130 panic("%s:%d: Invalid tarval (null)", file, line);
133 INLINE static void tarval_verify(tarval *tv) __attribute__ ((unused));
136 INLINE static void tarval_verify(tarval *tv)
142 if ((tv == tarval_bad) || (tv == tarval_undefined)) return;
143 if ((tv == tarval_b_true) || (tv == tarval_b_false)) return;
145 if (!FIND_TARVAL(tv)) fail_verify(tv);
146 if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv);
150 /** Hash a tarval. */
151 static int hash_tv(tarval *tv) {
152 return (PTR_TO_INT(tv->value) ^ PTR_TO_INT(tv->mode)) + tv->length;
155 /** Hash a value. Treat it as a byte array. */
156 static int hash_val(const void *value, unsigned int length) {
158 unsigned int hash = 0;
160 /* scramble the byte - array */
161 for (i = 0; i < length; ++i) {
162 hash += (hash << 5) ^ (hash >> 27) ^ ((char*)value)[i];
163 hash += (hash << 11) ^ (hash >> 17);
169 static int cmp_tv(const void *p1, const void *p2, size_t n) {
170 const tarval *tv1 = p1;
171 const tarval *tv2 = p2;
174 assert(tv1->kind == k_tarval);
175 assert(tv2->kind == k_tarval);
176 if (tv1->mode < tv2->mode)
178 if (tv1->mode > tv2->mode)
180 if (tv1->length < tv2->length)
182 if (tv1->length > tv2->length)
184 if (tv1->value < tv2->value)
186 if (tv1->value > tv2->value)
192 /** finds tarval with value/mode or creates new tarval */
193 static tarval *get_tarval(const void *value, int length, ir_mode *mode) {
200 /* if there already is such a value, it is returned, else value
201 * is copied into the set */
202 char *temp = alloca(length);
203 memcpy(temp, value, length);
204 if (get_mode_arithmetic(mode) == irma_twos_complement) {
205 sign_extend(temp, mode);
207 tv.value = INSERT_VALUE(temp, length);
211 /* if there is such a tarval, it is returned, else tv is copied
213 return (tarval *)INSERT_TARVAL(&tv);
219 static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
223 switch (get_mode_sort(mode)) {
225 /* addresses always wrap around */
226 temp = alloca(sc_get_buffer_length());
227 memcpy(temp, value, sc_get_buffer_length());
228 sc_truncate(get_mode_size_bits(mode), temp);
229 /* the sc_ module expects that all bits are set ... */
230 sign_extend(temp, mode);
231 return get_tarval(temp, length, mode);
233 case irms_int_number:
234 if (sc_comp(value, get_mode_max(mode)->value) == 1) {
235 switch (GET_OVERFLOW_MODE()) {
236 case TV_OVERFLOW_SATURATE:
237 return get_mode_max(mode);
238 case TV_OVERFLOW_WRAP:
239 temp = alloca(sc_get_buffer_length());
240 memcpy(temp, value, sc_get_buffer_length());
241 sc_truncate(get_mode_size_bits(mode), temp);
242 /* the sc_ module expects that all bits are set ... */
243 sign_extend(temp, mode);
244 return get_tarval(temp, length, mode);
245 case TV_OVERFLOW_BAD:
248 return get_tarval(value, length, mode);
251 if (sc_comp(value, get_mode_min(mode)->value) == -1) {
252 switch (GET_OVERFLOW_MODE()) {
253 case TV_OVERFLOW_SATURATE:
254 return get_mode_min(mode);
255 case TV_OVERFLOW_WRAP: {
256 char *temp = alloca(sc_get_buffer_length());
257 memcpy(temp, value, sc_get_buffer_length());
258 sc_truncate(get_mode_size_bits(mode), temp);
259 return get_tarval(temp, length, mode);
261 case TV_OVERFLOW_BAD:
264 return get_tarval(value, length, mode);
269 case irms_float_number:
270 if (SWITCH_NOINFINITY && fc_is_inf(value)) {
271 /* clip infinity to maximum value */
272 return fc_is_negative(value) ? get_mode_min(mode) : get_mode_max(mode);
275 if (SWITCH_NODENORMALS && fc_is_subnormal(value)) {
276 /* clip denormals to zero */
277 return get_mode_null(mode);
284 return get_tarval(value, length, mode);
288 * public variables declared in tv.h
290 static tarval reserved_tv[6];
292 tarval *tarval_b_false = &reserved_tv[0];
293 tarval *tarval_b_true = &reserved_tv[1];
294 tarval *tarval_bad = &reserved_tv[2];
295 tarval *tarval_undefined = &reserved_tv[3];
296 tarval *tarval_reachable = &reserved_tv[4];
297 tarval *tarval_unreachable = &reserved_tv[5];
300 * get the float descriptor for given mode.
302 static const ieee_descriptor_t *get_descriptor(const ir_mode *mode) {
303 switch (get_mode_size_bits(mode)) {
304 case 16: return &half_desc;
305 case 32: return &single_desc;
306 case 64: return &double_desc;
308 case 96: return &extended_desc;
309 case 128: return &quad_desc;
311 panic("Unsupported mode in get_descriptor()");
317 * public functions declared in tv.h
321 * Constructors =============================================================
323 tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
325 const ieee_descriptor_t *desc;
331 switch (get_mode_sort(mode)) {
332 case irms_control_flow:
335 panic("Unsupported tarval creation with mode %F", mode);
337 case irms_internal_boolean:
338 /* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
339 if (strcasecmp(str, "true"))
340 return tarval_b_true;
341 else if (strcasecmp(str, "false"))
342 return tarval_b_true;
344 /* XXX This is C semantics */
345 return atoi(str) ? tarval_b_true : tarval_b_false;
347 case irms_float_number:
348 desc = get_descriptor(mode);
349 fc_val_from_str(str, len, desc, NULL);
350 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
353 /* same as integer modes */
354 case irms_int_number:
355 sc_val_from_str(str, len, NULL, mode);
356 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
358 panic("Unsupported tarval creation with mode %F", mode);
362 * helper function, create a tarval from long
364 tarval *new_tarval_from_long(long l, ir_mode *mode) {
367 switch (get_mode_sort(mode)) {
368 case irms_internal_boolean:
369 /* XXX C semantics ! */
370 return l ? tarval_b_true : tarval_b_false ;
373 /* same as integer modes */
374 case irms_int_number:
375 sc_val_from_long(l, NULL);
376 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
378 case irms_float_number:
379 return new_tarval_from_double((long double)l, mode);
382 assert(0 && "unsupported mode sort");
387 /* returns non-zero if can be converted to long */
388 int tarval_is_long(tarval *tv) {
389 if (!mode_is_int(tv->mode) && !mode_is_reference(tv->mode))
392 if (get_mode_size_bits(tv->mode) > (int) (sizeof(long) << 3)) {
393 /* the value might be too big to fit in a long */
394 sc_max_from_bits(sizeof(long) << 3, 0, NULL);
395 if (sc_comp(sc_get_buffer(), tv->value) == -1) {
396 /* really doesn't fit */
403 /* this might overflow the machine's long, so use only with small values */
404 long get_tarval_long(tarval* tv) {
405 assert(tarval_is_long(tv) && "tarval too big to fit in long");
407 return sc_val_to_long(tv->value);
410 tarval *new_tarval_from_double(long double d, ir_mode *mode) {
411 const ieee_descriptor_t *desc;
413 assert(mode && (get_mode_sort(mode) == irms_float_number));
414 desc = get_descriptor(mode);
415 fc_val_from_ieee754(d, desc, NULL);
416 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
419 /* returns non-zero if can be converted to double */
420 int tarval_is_double(tarval *tv) {
423 return (get_mode_sort(tv->mode) == irms_float_number);
426 long double get_tarval_double(tarval *tv) {
427 assert(tarval_is_double(tv));
429 return fc_val_to_ieee754(tv->value);
434 * Access routines for tarval fields ========================================
437 /* get the mode of the tarval */
438 ir_mode *(get_tarval_mode)(const tarval *tv) {
439 return _get_tarval_mode(tv);
443 * Special value query functions ============================================
445 * These functions calculate and return a tarval representing the requested
447 * The functions get_mode_{Max,Min,...} return tarvals retrieved from these
448 * functions, but these are stored on initialization of the irmode module and
449 * therefore the irmode functions should be preferred to the functions below.
452 tarval *(get_tarval_bad)(void) {
453 return _get_tarval_bad();
456 tarval *(get_tarval_undefined)(void) {
457 return _get_tarval_undefined();
460 tarval *(get_tarval_b_false)(void) {
461 return _get_tarval_b_false();
464 tarval *(get_tarval_b_true)(void) {
465 return _get_tarval_b_true();
468 tarval *(get_tarval_reachable)(void) {
469 return _get_tarval_reachable();
472 tarval *(get_tarval_unreachable)(void) {
473 return _get_tarval_unreachable();
476 tarval *get_tarval_max(ir_mode *mode) {
477 const ieee_descriptor_t *desc;
480 if (get_mode_n_vector_elems(mode) > 1) {
481 /* vector arithmetic not implemented yet */
485 switch (get_mode_sort(mode)) {
486 case irms_control_flow:
489 panic("mode %F does not support maximum value", mode);
491 case irms_internal_boolean:
492 return tarval_b_true;
494 case irms_float_number:
495 desc = get_descriptor(mode);
496 fc_get_max(desc, NULL);
497 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
500 case irms_int_number:
501 sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
502 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
507 tarval *get_tarval_min(ir_mode *mode) {
508 const ieee_descriptor_t *desc;
511 if (get_mode_n_vector_elems(mode) > 1) {
512 /* vector arithmetic not implemented yet */
516 switch (get_mode_sort(mode)) {
517 case irms_control_flow:
520 panic("mode %F does not support minimum value", mode);
522 case irms_internal_boolean:
523 return tarval_b_false;
525 case irms_float_number:
526 desc = get_descriptor(mode);
527 fc_get_min(desc, NULL);
528 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
531 case irms_int_number:
532 sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
533 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
538 /** The bit pattern for the pointer NULL */
539 static long _null_value = 0;
541 tarval *get_tarval_null(ir_mode *mode) {
544 if (get_mode_n_vector_elems(mode) > 1) {
545 /* vector arithmetic not implemented yet */
549 switch (get_mode_sort(mode)) {
550 case irms_control_flow:
553 panic("mode %F does not support null value", mode);
555 case irms_float_number:
556 return new_tarval_from_double(0.0, mode);
558 case irms_internal_boolean:
559 case irms_int_number:
560 return new_tarval_from_long(0l, mode);
563 return new_tarval_from_long(_null_value, mode);
568 tarval *get_tarval_one(ir_mode *mode) {
571 if (get_mode_n_vector_elems(mode) > 1)
572 panic("vector arithmetic not implemented yet");
574 switch (get_mode_sort(mode)) {
575 case irms_control_flow:
578 panic("mode %F does not support one value", mode);
580 case irms_internal_boolean:
581 return tarval_b_true;
583 case irms_float_number:
584 return new_tarval_from_double(1.0, mode);
587 case irms_int_number:
588 return new_tarval_from_long(1l, mode);
593 tarval *get_tarval_all_one(ir_mode *mode) {
596 if (get_mode_n_vector_elems(mode) > 1)
597 panic("vector arithmetic not implemented yet");
599 switch (get_mode_sort(mode)) {
600 case irms_control_flow:
603 panic("mode %F does not support all-one value", mode);
605 case irms_int_number:
606 case irms_internal_boolean:
608 return tarval_not(get_mode_null(mode));
611 case irms_float_number:
612 return new_tarval_from_double(1.0, mode);
617 int tarval_is_constant(tarval *tv) {
618 int num_res = sizeof(reserved_tv) / sizeof(reserved_tv[0]);
620 /* reserved tarvals are NOT constants. Note that although
621 tarval_b_true and tarval_b_false are reserved, they are constants of course. */
622 return (tv < &reserved_tv[2] || tv > &reserved_tv[num_res - 1]);
625 tarval *get_tarval_minus_one(ir_mode *mode) {
628 if (get_mode_n_vector_elems(mode) > 1)
629 panic("vector arithmetic not implemented yet");
631 switch (get_mode_sort(mode)) {
632 case irms_control_flow:
635 case irms_internal_boolean:
636 panic("mode %F does not support minus one value", mode);
641 case irms_float_number:
642 return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad;
644 case irms_int_number:
645 return new_tarval_from_long(-1l, mode);
650 tarval *get_tarval_nan(ir_mode *mode) {
651 const ieee_descriptor_t *desc;
654 if (get_mode_n_vector_elems(mode) > 1)
655 panic("vector arithmetic not implemented yet");
657 if (get_mode_sort(mode) == irms_float_number) {
658 desc = get_descriptor(mode);
659 fc_get_qnan(desc, NULL);
660 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
662 panic("mode %F does not support NaN value", mode);
665 tarval *get_tarval_plus_inf(ir_mode *mode) {
667 if (get_mode_n_vector_elems(mode) > 1)
668 panic("vector arithmetic not implemented yet");
670 if (get_mode_sort(mode) == irms_float_number) {
671 const ieee_descriptor_t *desc = get_descriptor(mode);
672 fc_get_plusinf(desc, NULL);
673 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
675 panic("mode %F does not support +inf value", mode);
678 tarval *get_tarval_minus_inf(ir_mode *mode) {
681 if (get_mode_n_vector_elems(mode) > 1)
682 panic("vector arithmetic not implemented yet");
684 if (get_mode_sort(mode) == irms_float_number) {
685 const ieee_descriptor_t *desc = get_descriptor(mode);
686 fc_get_minusinf(desc, NULL);
687 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
689 panic("mode %F does not support -inf value", mode);
693 * Arithmetic operations on tarvals ========================================
697 * test if negative number, 1 means 'yes'
699 int tarval_is_negative(tarval *a) {
702 if (get_mode_n_vector_elems(a->mode) > 1)
703 panic("vector arithmetic not implemented yet");
705 switch (get_mode_sort(a->mode)) {
706 case irms_int_number:
707 if (!mode_is_signed(a->mode)) return 0;
709 return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
711 case irms_float_number:
712 return fc_is_negative(a->value);
715 panic("mode %F does not support negation value", a->mode);
720 * test if null, 1 means 'yes'
722 int tarval_is_null(tarval *a) {
725 a == get_mode_null(get_tarval_mode(a));
729 * test if one, 1 means 'yes'
731 int tarval_is_one(tarval *a) {
734 a == get_mode_one(get_tarval_mode(a));
737 int tarval_is_all_one(tarval *tv) {
740 tv == get_mode_all_one(get_tarval_mode(tv));
744 * test if one, 1 means 'yes'
746 int tarval_is_minus_one(tarval *a) {
749 a == get_mode_minus_one(get_tarval_mode(a));
755 pn_Cmp tarval_cmp(tarval *a, tarval *b) {
759 if (a == tarval_bad || b == tarval_bad) {
760 panic("Comparison with tarval_bad");
764 if (a == tarval_undefined || b == tarval_undefined)
767 if (a->mode != b->mode)
770 if (get_mode_n_vector_elems(a->mode) > 1) {
771 /* vector arithmetic not implemented yet */
772 assert(0 && "cmp not implemented for vector modes");
775 /* Here the two tarvals are unequal and of the same mode */
776 switch (get_mode_sort(a->mode)) {
777 case irms_control_flow:
784 case irms_float_number:
785 /* it should be safe to enable this even if other arithmetic is disabled */
787 return pn_Cmp_False;*/
789 * BEWARE: we cannot compare a == b here, because
790 * a NaN is always Unordered to any other value, even to itself!
792 switch (fc_comp(a->value, b->value)) {
793 case -1: return pn_Cmp_Lt;
794 case 0: return pn_Cmp_Eq;
795 case 1: return pn_Cmp_Gt;
796 case 2: return pn_Cmp_Uo;
797 default: return pn_Cmp_False;
800 case irms_int_number:
803 return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt;
805 case irms_internal_boolean:
808 return a == tarval_b_true ? pn_Cmp_Gt : pn_Cmp_Lt;
814 * convert to other mode
816 tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
819 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) {
960 assert(mode_is_num(a->mode)); /* negation only for numerical values */
962 /* note: negation is allowed even for unsigned modes. */
964 if (get_mode_n_vector_elems(a->mode) > 1) {
965 /* vector arithmetic not implemented yet */
969 switch (get_mode_sort(a->mode)) {
970 case irms_int_number:
971 buffer = alloca(sc_get_buffer_length());
972 sc_neg(a->value, buffer);
973 return get_tarval_overflow(buffer, a->length, a->mode);
975 case irms_float_number:
976 /* it should be safe to enable this even if other arithmetic is disabled */
980 fc_neg(a->value, NULL);
981 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
991 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 return get_tarval_overflow(buffer, a->length, a->mode);
1018 case irms_float_number:
1022 fc_add(a->value, b->value, NULL);
1023 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1033 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 return get_tarval_overflow(buffer, a->length, a->mode);
1060 case irms_float_number:
1064 fc_sub(a->value, b->value, NULL);
1065 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1075 tarval *tarval_mul(tarval *a, tarval *b) {
1080 assert(a->mode == b->mode);
1082 if (get_mode_n_vector_elems(a->mode) > 1) {
1083 /* vector arithmetic not implemented yet */
1087 switch (get_mode_sort(a->mode)) {
1088 case irms_int_number:
1089 /* modes of a,b are equal */
1090 buffer = alloca(sc_get_buffer_length());
1091 sc_mul(a->value, b->value, buffer);
1092 return get_tarval_overflow(buffer, a->length, a->mode);
1094 case irms_float_number:
1098 fc_mul(a->value, b->value, NULL);
1099 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1107 * floating point division
1109 tarval *tarval_quo(tarval *a, tarval *b) {
1112 assert((a->mode == b->mode) && mode_is_float(a->mode));
1117 if (get_mode_n_vector_elems(a->mode) > 1) {
1118 /* vector arithmetic not implemented yet */
1122 fc_div(a->value, b->value, NULL);
1123 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1128 * overflow is impossible, but look out for division by zero
1130 tarval *tarval_div(tarval *a, tarval *b) {
1133 assert((a->mode == b->mode) && mode_is_int(a->mode));
1135 if (get_mode_n_vector_elems(a->mode) > 1) {
1136 /* vector arithmetic not implemented yet */
1141 if (b == get_mode_null(b->mode)) return tarval_bad;
1142 /* modes of a,b are equal */
1143 sc_div(a->value, b->value, NULL);
1144 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1149 * overflow is impossible, but look out for division by zero
1151 tarval *tarval_mod(tarval *a, tarval *b) {
1154 assert((a->mode == b->mode) && mode_is_int(a->mode));
1156 if (get_mode_n_vector_elems(a->mode) > 1) {
1157 /* vector arithmetic not implemented yet */
1162 if (b == get_mode_null(b->mode)) return tarval_bad;
1163 /* modes of a,b are equal */
1164 sc_mod(a->value, b->value, NULL);
1165 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1169 * integer division AND remainder
1170 * overflow is impossible, but look out for division by zero
1172 tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
1173 int len = sc_get_buffer_length();
1174 char *div_res = alloca(len);
1175 char *mod_res = alloca(len);
1179 assert((a->mode == b->mode) && mode_is_int(a->mode));
1181 if (get_mode_n_vector_elems(a->mode) > 1) {
1182 /* vector arithmetic not implemented yet */
1188 if (b == get_mode_null(b->mode)) return tarval_bad;
1189 /* modes of a,b are equal */
1190 sc_divmod(a->value, b->value, div_res, mod_res);
1191 *mod = get_tarval(mod_res, len, a->mode);
1192 return get_tarval(div_res, len, a->mode);
1198 tarval *tarval_abs(tarval *a) {
1202 assert(mode_is_num(a->mode));
1204 if (get_mode_n_vector_elems(a->mode) > 1) {
1205 /* vector arithmetic not implemented yet */
1209 switch (get_mode_sort(a->mode)) {
1210 case irms_int_number:
1211 if (sc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
1212 buffer = alloca(sc_get_buffer_length());
1213 sc_neg(a->value, buffer);
1214 return get_tarval_overflow(buffer, a->length, a->mode);
1218 case irms_float_number:
1219 /* it should be safe to enable this even if other arithmetic is disabled */
1221 return tarval_bad;*/
1223 if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
1224 fc_neg(a->value, NULL);
1225 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1238 tarval *tarval_and(tarval *a, tarval *b) {
1241 assert(a->mode == b->mode);
1243 /* 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) {
1265 assert(a->mode == b->mode);
1267 /* works even for vector modes */
1269 switch (get_mode_sort(a->mode)) {
1270 case irms_internal_boolean:
1271 return (a == tarval_b_true) ? a : b;
1273 case irms_int_number:
1274 sc_or(a->value, b->value, NULL);
1275 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1278 assert(0 && "operation not defined on mode");
1284 * bitwise exclusive or (xor)
1286 tarval *tarval_eor(tarval *a, tarval *b) {
1289 assert((a->mode == b->mode));
1291 /* works even for vector modes */
1293 switch (get_mode_sort(a->mode)) {
1294 case irms_internal_boolean:
1295 return (a == b)? tarval_b_false : tarval_b_true;
1297 case irms_int_number:
1298 sc_xor(a->value, b->value, NULL);
1299 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1302 assert(0 && "operation not defined on mode");
1308 * bitwise left shift
1310 tarval *tarval_shl(tarval *a, tarval *b) {
1311 char *temp_val = NULL;
1315 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1317 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1318 /* vector arithmetic not implemented yet */
1322 if (get_mode_modulo_shift(a->mode) != 0) {
1323 temp_val = alloca(sc_get_buffer_length());
1325 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1326 sc_mod(b->value, temp_val, temp_val);
1328 temp_val = (char*)b->value;
1330 sc_shl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1331 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1335 * bitwise unsigned right shift
1337 tarval *tarval_shr(tarval *a, tarval *b) {
1338 char *temp_val = NULL;
1342 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1344 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1345 /* vector arithmetic not implemented yet */
1349 if (get_mode_modulo_shift(a->mode) != 0) {
1350 temp_val = alloca(sc_get_buffer_length());
1352 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1353 sc_mod(b->value, temp_val, temp_val);
1355 temp_val = (char*)b->value;
1357 sc_shr(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1358 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1362 * bitwise signed right shift
1364 tarval *tarval_shrs(tarval *a, tarval *b) {
1365 char *temp_val = NULL;
1369 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1371 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1372 /* vector arithmetic not implemented yet */
1376 if (get_mode_modulo_shift(a->mode) != 0) {
1377 temp_val = alloca(sc_get_buffer_length());
1379 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1380 sc_mod(b->value, temp_val, temp_val);
1382 temp_val = (char*)b->value;
1384 sc_shrs(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1385 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1389 * bitwise rotation to left
1391 tarval *tarval_rotl(tarval *a, tarval *b) {
1392 char *temp_val = NULL;
1396 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1398 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1399 /* vector arithmetic not implemented yet */
1403 if (get_mode_modulo_shift(a->mode) != 0) {
1404 temp_val = alloca(sc_get_buffer_length());
1406 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1407 sc_mod(b->value, temp_val, temp_val);
1409 temp_val = (char*)b->value;
1411 sc_rotl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1412 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1416 * carry flag of the last operation
1418 int tarval_carry(void) {
1419 panic("tarval_carry() requetsed: not implemented on all operations");
1420 return sc_had_carry();
1426 int tarval_snprintf(char *buf, size_t len, tarval *tv) {
1427 static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL };
1431 const tarval_mode_info *mode_info;
1432 const char *prefix, *suffix;
1434 mode_info = tv->mode->tv_priv;
1436 mode_info = &default_info;
1437 prefix = mode_info->mode_prefix ? mode_info->mode_prefix : "";
1438 suffix = mode_info->mode_suffix ? mode_info->mode_suffix : "";
1440 switch (get_mode_sort(tv->mode)) {
1441 case irms_reference:
1442 if (tv == tv->mode->null) return snprintf(buf, len, "NULL");
1444 case irms_int_number:
1445 switch (mode_info->mode_output) {
1448 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_DEC, mode_is_signed(tv->mode));
1452 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 int tarval_enable_fp_ops(int enable) {
1693 int old = !no_float;
1700 * default mode_info for output as HEX
1702 static const tarval_mode_info hex_output = {
1709 * Initialization of the tarval module: called before init_mode()
1711 void init_tarval_1(long null_value, int support_quad_precision) {
1712 /* if these assertion fail, tarval_is_constant() will follow ... */
1713 assert(tarval_b_false == &reserved_tv[0] && "b_false MUST be the first reserved tarval!");
1714 assert(tarval_b_true == &reserved_tv[1] && "b_true MUST be the second reserved tarval!");
1716 _null_value = null_value;
1718 /* initialize the sets holding the tarvals with a comparison function and
1719 * an initial size, which is the expected number of constants */
1720 tarvals = new_set(cmp_tv, N_CONSTANTS);
1721 values = new_set(memcmp, N_CONSTANTS);
1722 /* calls init_strcalc() with needed size */
1723 init_fltcalc(support_quad_precision ? 112 : 64);
1727 * Initialization of the tarval module: called after init_mode()
1729 void init_tarval_2(void) {
1730 tarval_bad->kind = k_tarval;
1731 tarval_bad->mode = mode_BAD;
1732 tarval_bad->value = INT_TO_PTR(resid_tarval_bad);
1734 tarval_undefined->kind = k_tarval;
1735 tarval_undefined->mode = mode_ANY;
1736 tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined);
1738 tarval_b_true->kind = k_tarval;
1739 tarval_b_true->mode = mode_b;
1740 tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true);
1742 tarval_b_false->kind = k_tarval;
1743 tarval_b_false->mode = mode_b;
1744 tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false);
1746 tarval_unreachable->kind = k_tarval;
1747 tarval_unreachable->mode = mode_X;
1748 tarval_unreachable->value = INT_TO_PTR(resid_tarval_unreachable);
1750 tarval_reachable->kind = k_tarval;
1751 tarval_reachable->mode = mode_X;
1752 tarval_reachable->value = INT_TO_PTR(resid_tarval_reachable);
1755 * assign output modes that are compatible with the
1756 * old implementation: Hex output
1758 set_tarval_mode_output_option(mode_Bs, &hex_output);
1759 set_tarval_mode_output_option(mode_Bu, &hex_output);
1760 set_tarval_mode_output_option(mode_Hs, &hex_output);
1761 set_tarval_mode_output_option(mode_Hu, &hex_output);
1762 set_tarval_mode_output_option(mode_Is, &hex_output);
1763 set_tarval_mode_output_option(mode_Iu, &hex_output);
1764 set_tarval_mode_output_option(mode_Ls, &hex_output);
1765 set_tarval_mode_output_option(mode_Lu, &hex_output);
1766 set_tarval_mode_output_option(mode_P, &hex_output);
1769 /* free all memory occupied by tarval. */
1770 void finish_tarval(void) {
1773 del_set(tarvals); tarvals = NULL;
1774 del_set(values); values = NULL;
1777 int (is_tarval)(const void *thing) {
1778 return _is_tarval(thing);
1781 /****************************************************************************
1783 ****************************************************************************/