3 * File name: ir/tv/tv.c
4 * Purpose: Representation of and static computations on target machine
10 * Copyright: (c) 2003 Universität Karlsruhe
11 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
15 * Values are stored in a format depending upon chosen arithmetic
16 * module. Default uses strcalc and fltcalc.
20 /* This implementation assumes:
21 * - target has IEEE-754 floating-point arithmetic. */
29 #include <assert.h> /* assertions */
30 #include <stdlib.h> /* atoi() */
32 # include <string.h> /* nice things for strings */
35 #include <strings.h> /* strings.h also includes bsd only function strcasecmp */
46 #include "set.h" /* to store tarvals in */
47 /* #include "tune.h" */ /* some constants */
48 #include "entity_t.h" /* needed to store pointers to entities */
50 #include "irnode.h" /* defines boolean return values (pnc_number)*/
54 /** Size of hash tables. Should correspond to average number of distinct constant
56 #define N_CONSTANTS 2048
58 /* get the integer overflow mode */
59 #define GET_OVERFLOW_MODE() int_overflow_mode
61 /* unused, float to int doesn't work yet */
64 #define GET_FLOAT_TO_INT_MODE() TRUNCATE
66 #define SWITCH_NOINFINITY 0
67 #define SWITCH_NODENORMALS 0
69 /****************************************************************************
70 * local definitions and macros
71 ****************************************************************************/
73 # define TARVAL_VERIFY(a) tarval_verify((a))
75 # define TARVAL_VERIFY(a) ((void)0)
78 #define INSERT_TARVAL(tv) ((tarval*)set_insert(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
79 #define FIND_TARVAL(tv) ((tarval*)set_find(tarvals, (tv), sizeof(tarval), hash_tv((tv))))
81 #define INSERT_VALUE(val, size) (set_insert(values, (val), size, hash_val((val), size)))
82 #define FIND_VALUE(val, size) (set_find(values, (val), size, hash_val((val), size)))
84 #define fail_verify(a) _fail_verify((a), __FILE__, __LINE__)
86 static long long count = 0;
87 # define ANNOUNCE() printf(__FILE__": call no. %lld (%s)\n", count++, __FUNCTION__);
89 # define ANNOUNCE() ((void)0)
91 /****************************************************************************
93 ****************************************************************************/
94 static struct set *tarvals; /* container for tarval structs */
95 static struct set *values; /* container for values */
96 static tarval_int_overflow_mode_t int_overflow_mode = TV_OVERFLOW_WRAP;
98 /****************************************************************************
100 ****************************************************************************/
102 static int hash_val(const void *value, unsigned int length);
103 static int hash_tv(tarval *tv);
104 static void _fail_verify(tarval *tv, const char* file, int line)
106 /* print a memory image of the tarval and throw an assertion */
108 printf("%s:%d: Invalid tarval:\n mode: %s\n value: [%p]\n", file, line, get_mode_name(tv->mode), tv->value);
110 printf("%s:%d: Invalid tarval (null)", file, line);
114 INLINE static void tarval_verify(tarval *tv) __attribute__ ((unused));
117 INLINE static void tarval_verify(tarval *tv)
123 if ((tv == tarval_bad) || (tv == tarval_undefined)) return;
124 if ((tv == tarval_b_true) || (tv == tarval_b_false)) return;
126 if (!FIND_TARVAL(tv)) fail_verify(tv);
127 if (tv->length > 0 && !FIND_VALUE(tv->value, tv->length)) fail_verify(tv);
133 static int hash_tv(tarval *tv)
135 return ((unsigned int)tv->value ^ (unsigned int)tv->mode) + tv->length;
138 static int hash_val(const void *value, unsigned int length)
141 unsigned int hash = 0;
143 /* scramble the byte - array */
144 for (i = 0; i < length; i++)
146 hash += (hash << 5) ^ (hash >> 27) ^ ((char*)value)[i];
147 hash += (hash << 11) ^ (hash >> 17);
153 /* finds tarval with value/mode or creates new tarval */
154 static tarval *get_tarval(const void *value, int length, ir_mode *mode)
161 /* if there already is such a value, it is returned, else value
162 * is copied into the set */
163 tv.value = INSERT_VALUE(value, length);
167 /* if there is such a tarval, it is returned, else tv is copied
169 return (tarval *)INSERT_TARVAL(&tv);
175 static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
177 switch (get_mode_sort(mode))
179 case irms_int_number:
180 if (sc_comp(value, get_mode_max(mode)->value) == 1) {
181 switch (GET_OVERFLOW_MODE()) {
182 case TV_OVERFLOW_SATURATE:
183 return get_mode_max(mode);
184 case TV_OVERFLOW_WRAP:
186 char *temp = alloca(sc_get_buffer_length());
187 char *diff = alloca(sc_get_buffer_length());
188 sc_sub(get_mode_max(mode)->value, get_mode_min(mode)->value, diff);
189 sc_val_from_ulong(1, temp);
190 sc_add(diff, temp, diff);
191 sc_sub(value, diff, temp);
192 while (sc_comp(temp, get_mode_max(mode)->value) == 1)
193 sc_sub(temp, diff, temp);
194 return get_tarval(temp, length, mode);
196 case TV_OVERFLOW_BAD:
199 return get_tarval(value, length, mode);
202 if (sc_comp(value, get_mode_min(mode)->value) == -1) {
203 switch (GET_OVERFLOW_MODE()) {
204 case TV_OVERFLOW_SATURATE:
205 return get_mode_min(mode);
206 case TV_OVERFLOW_WRAP:
208 char *temp = alloca(sc_get_buffer_length());
209 char *diff = alloca(sc_get_buffer_length());
210 sc_sub(get_mode_max(mode)->value, get_mode_min(mode)->value, diff);
211 sc_val_from_ulong(1, temp);
212 sc_add(diff, temp, diff);
213 sc_add(value, diff, temp);
214 while (sc_comp(temp, get_mode_max(mode)->value) == 1)
215 sc_add(temp, diff, temp);
216 return get_tarval(temp, length, mode);
218 case TV_OVERFLOW_BAD:
221 return get_tarval(value, length, mode);
226 case irms_float_number:
227 if (SWITCH_NOINFINITY && fc_is_inf(value))
229 return fc_is_negative(value)?get_mode_min(mode):get_mode_max(mode);
232 if (SWITCH_NODENORMALS && fc_is_subnormal(value))
234 return get_mode_null(mode);
240 return get_tarval(value, length, mode);
245 * public variables declared in tv.h
247 static tarval reserved_tv[5];
249 tarval *tarval_bad = &reserved_tv[0];
250 tarval *tarval_undefined = &reserved_tv[1];
251 tarval *tarval_b_false = &reserved_tv[2];
252 tarval *tarval_b_true = &reserved_tv[3];
253 tarval *tarval_P_void = &reserved_tv[4];
256 * public functions declared in tv.h
260 * Constructors =============================================================
262 tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
269 switch (get_mode_sort(mode))
271 case irms_control_flow:
277 case irms_internal_boolean:
278 /* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
279 if (strcasecmp(str, "true")) return tarval_b_true;
280 else if (strcasecmp(str, "false")) return tarval_b_true;
282 /* XXX This is C semantics */
283 return atoi(str) ? tarval_b_true : tarval_b_false;
285 case irms_float_number:
286 switch(get_mode_size_bits(mode)) {
288 fc_val_from_str(str, len, 8, 23, NULL);
291 fc_val_from_str(str, len, 11, 52, NULL);
294 fc_val_from_str(str, len, 15, 64, NULL);
297 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
299 case irms_int_number:
301 sc_val_from_str(str, len, NULL);
302 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
305 return get_tarval(str, len, mode);
308 assert(0); /* can't be reached, can it? */
313 * helper function, create a tarval from long
315 tarval *new_tarval_from_long(long l, ir_mode *mode)
318 assert(mode && !((get_mode_sort(mode) == irms_memory)||(get_mode_sort(mode)==irms_control_flow)||(get_mode_sort(mode)==irms_auxiliary)));
320 switch(get_mode_sort(mode))
322 case irms_internal_boolean:
323 /* XXX C semantics ! */
324 return l ? tarval_b_true : tarval_b_false ;
326 case irms_int_number:
328 sc_val_from_long(l, NULL);
329 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
331 case irms_float_number:
332 return new_tarval_from_double((long double)l, mode);
335 return l ? tarval_bad : get_tarval(NULL, 0, mode); /* null pointer or tarval_bad */
343 /* returns non-zero if can be converted to long */
344 int tarval_is_long(tarval *tv)
347 if (get_mode_sort(tv->mode) != irms_int_number) return 0;
349 if (get_mode_size_bits(tv->mode) > sizeof(long)<<3)
351 /* the value might be too big to fit in a long */
352 sc_max_from_bits(sizeof(long)<<3, 0, NULL);
353 if (sc_comp(sc_get_buffer(), tv->value) == -1)
355 /* really doesn't fit */
362 /* this might overflow the machine's long, so use only with small values */
363 long get_tarval_long(tarval* tv)
366 assert(tarval_is_long(tv) && "tarval too big to fit in long");
368 return sc_val_to_long(tv->value);
371 tarval *new_tarval_from_double(long double d, ir_mode *mode)
374 assert(mode && (get_mode_sort(mode) == irms_float_number));
376 switch (get_mode_size_bits(mode)) {
378 fc_val_from_float(d, 8, 23, NULL);
381 fc_val_from_float(d, 11, 52, NULL);
384 fc_val_from_float(d, 15, 64, NULL);
387 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
390 /* returns non-zero if can be converted to double */
391 int tarval_is_double(tarval *tv)
396 return (get_mode_sort(tv->mode) == irms_float_number);
399 long double get_tarval_double(tarval *tv)
402 assert(tarval_is_double(tv));
404 return fc_val_to_float(tv->value);
409 * Access routines for tarval fields ========================================
411 ir_mode *get_tarval_mode (tarval *tv) /* get the mode of the tarval */
419 void *get_tarval_link (tarval *tv)
428 * Special value query functions ============================================
430 * These functions calculate and return a tarval representing the requested
432 * The functions get_mode_{Max,Min,...} return tarvals retrieved from these
433 * functions, but these are stored on initialization of the irmode module and
434 * therefore the irmode functions should be prefered to the functions below.
437 tarval *get_tarval_bad(void)
442 tarval *get_tarval_undefined(void)
445 return tarval_undefined;
447 tarval *get_tarval_b_false(void)
450 return tarval_b_false;
452 tarval *get_tarval_b_true(void)
455 return tarval_b_true;
457 tarval *get_tarval_P_void(void)
460 return tarval_P_void;
463 tarval *get_tarval_max(ir_mode *mode)
468 if (get_mode_n_vector_elems(mode) > 1) {
469 /* vector arithmetic not implemented yet */
473 switch(get_mode_sort(mode))
476 case irms_control_flow:
482 case irms_internal_boolean:
483 return tarval_b_true;
485 case irms_float_number:
486 switch(get_mode_size_bits(mode))
489 fc_get_max(8, 23, NULL);
492 fc_get_max(11, 52, NULL);
495 fc_get_max(15, 64, NULL);
498 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
500 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)
513 if (get_mode_n_vector_elems(mode) > 1) {
514 /* vector arithmetic not implemented yet */
518 switch(get_mode_sort(mode))
521 case irms_control_flow:
527 case irms_internal_boolean:
528 return tarval_b_false;
530 case irms_float_number:
531 switch(get_mode_size_bits(mode))
534 fc_get_min(8, 23, NULL);
537 fc_get_min(11, 52, NULL);
540 fc_get_min(15, 64, NULL);
543 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
545 case irms_int_number:
547 sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
548 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
553 tarval *get_tarval_null(ir_mode *mode)
558 if (get_mode_n_vector_elems(mode) > 1) {
559 /* vector arithmetic not implemented yet */
563 switch(get_mode_sort(mode))
565 case irms_control_flow:
568 case irms_internal_boolean:
572 case irms_float_number:
573 return new_tarval_from_double(0.0, mode);
575 case irms_int_number:
577 return new_tarval_from_long(0l, mode);
580 return tarval_P_void;
585 tarval *get_tarval_one(ir_mode *mode)
590 if (get_mode_n_vector_elems(mode) > 1) {
591 /* vector arithmetic not implemented yet */
595 switch(get_mode_sort(mode))
597 case irms_control_flow:
600 case irms_internal_boolean:
605 case irms_float_number:
606 return new_tarval_from_double(1.0, mode);
608 case irms_int_number:
610 return new_tarval_from_long(1l, mode);
616 tarval *get_tarval_nan(ir_mode *mode)
621 if (get_mode_n_vector_elems(mode) > 1) {
622 /* vector arithmetic not implemented yet */
626 if (get_mode_sort(mode) == irms_float_number) {
627 switch(get_mode_size_bits(mode))
630 fc_get_qnan(8, 23, NULL);
633 fc_get_qnan(11, 52, NULL);
636 fc_get_qnan(15, 64, NULL);
639 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
642 assert(0 && "tarval is not floating point");
647 tarval *get_tarval_plus_inf(ir_mode *mode)
652 if (get_mode_n_vector_elems(mode) > 1) {
653 /* vector arithmetic not implemented yet */
657 if (get_mode_sort(mode) == irms_float_number) {
658 switch(get_mode_size_bits(mode))
661 fc_get_plusinf(8, 23, NULL);
664 fc_get_plusinf(11, 52, NULL);
667 fc_get_plusinf(15, 64, NULL);
670 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
673 assert(0 && "tarval is not floating point");
678 tarval *get_tarval_minus_inf(ir_mode *mode)
683 if (get_mode_n_vector_elems(mode) > 1) {
684 /* vector arithmetic not implemented yet */
688 if (get_mode_sort(mode) == irms_float_number) {
689 switch(get_mode_size_bits(mode))
692 fc_get_minusinf(8, 23, NULL);
695 fc_get_minusinf(11, 52, NULL);
698 fc_get_minusinf(15, 64, NULL);
701 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)
721 if (get_mode_n_vector_elems(a->mode) > 1) {
722 /* vector arithmetic not implemented yet */
723 assert(0 && "tarval_is_negative is not allowed for vector modes");
727 switch (get_mode_sort(a->mode))
729 case irms_int_number:
730 if (!mode_is_signed(a->mode)) return 0;
732 return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
734 case irms_float_number:
735 return fc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
738 assert(0 && "not implemented");
744 * test if null, 1 means 'yes'
746 int tarval_is_null(tarval *a)
748 ir_mode *m = get_tarval_mode(a);
750 return a == get_tarval_null(m);
754 * test if one, 1 means 'yes'
756 int tarval_is_one(tarval *a)
758 ir_mode *m = get_tarval_mode(a);
760 return a == get_tarval_one(m);
766 pnc_number tarval_cmp(tarval *a, tarval *b)
772 if (a == tarval_bad || b == tarval_bad) assert(0 && "Comparison with tarval_bad");
773 if (a == tarval_undefined || b == tarval_undefined) return False;
774 if (a == b) return Eq;
775 if (a->mode != b->mode) return False;
777 if (get_mode_n_vector_elems(a->mode) > 1) {
778 /* vector arithmetic not implemented yet */
779 assert(0 && "cmp not implemented for vector modes");
782 /* Here the two tarvals are unequal and of the same mode */
783 switch (get_mode_sort(a->mode))
785 case irms_control_flow:
791 case irms_float_number:
792 switch (fc_comp(a->value, b->value)) {
794 case 0: assert(0 && "different tarvals compare equal"); return Eq;
797 default: return False;
799 case irms_int_number:
801 return (sc_comp(a->value, b->value)==1)?(Gt):(Lt);
803 case irms_internal_boolean:
804 return (a == tarval_b_true)?(Gt):(Lt);
810 * convert to other mode
812 tarval *tarval_convert_to(tarval *src, ir_mode *m)
820 if (src->mode == m) return src;
822 if (get_mode_n_vector_elems(src->mode) > 1) {
823 /* vector arithmetic not implemented yet */
827 switch (get_mode_sort(src->mode))
829 case irms_control_flow:
834 /* cast float to something */
835 case irms_float_number:
836 switch (get_mode_sort(m)) {
837 case irms_float_number:
838 switch (get_mode_size_bits(m))
841 fc_cast(src->value, 8, 23, NULL);
844 fc_cast(src->value, 11, 52, NULL);
847 fc_cast(src->value, 15, 64, NULL);
852 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m);
854 case irms_int_number:
855 switch (GET_FLOAT_TO_INT_MODE())
858 fc_int(src->value, NULL);
861 fc_rnd(src->value, NULL);
866 /* XXX floating point unit can't produce a value in integer
868 * an intermediate representation is needed here first. */
869 /* return get_tarval(); */
873 /* the rest can't be converted */
878 /* cast int to something */
879 case irms_int_number:
880 switch (get_mode_sort(m)) {
881 case irms_int_number:
883 return get_tarval_overflow(src->value, src->length, m);
885 case irms_internal_boolean:
886 /* XXX C semantics */
887 if (src == get_mode_null(src->mode)) return tarval_b_false;
888 else return tarval_b_true;
890 case irms_float_number:
891 /* XXX floating point unit does not understand internal integer
892 * representation, convert to string first, then create float from
894 buffer = alloca(100);
895 /* decimal string representation because hexadecimal output is
896 * interpreted unsigned by fc_val_from_str, so this is a HACK */
897 snprintf(buffer, 100, "%s",
898 sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC));
899 switch (get_mode_size_bits(m))
902 fc_val_from_str(buffer, 0, 8, 23, NULL);
905 fc_val_from_str(buffer, 0, 11, 52, NULL);
908 fc_val_from_str(buffer, 0, 15, 64, NULL);
911 return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m);
918 case irms_internal_boolean:
919 switch (get_mode_sort(m))
921 case irms_int_number:
922 if (src == tarval_b_true) return get_mode_one(m);
923 else return get_mode_null(m);
942 tarval *tarval_not(tarval *a)
948 assert(mode_is_int(a->mode)); /* bitwise negation is only allowed for integer */
950 /* works for vector mode without changes */
952 switch (get_mode_sort(a->mode))
954 case irms_int_number:
955 buffer = alloca(sc_get_buffer_length());
956 sc_not(a->value, buffer);
957 return get_tarval(buffer, a->length, a->mode);
965 * arithmetic negation
967 tarval *tarval_neg(tarval *a)
973 assert(mode_is_num(a->mode)); /* negation only for numerical values */
975 /* note: negation is allowed even for unsigned modes. */
977 if (get_mode_n_vector_elems(a->mode) > 1) {
978 /* vector arithmetic not implemented yet */
982 switch (get_mode_sort(a->mode))
984 case irms_int_number:
985 buffer = alloca(sc_get_buffer_length());
986 sc_neg(a->value, buffer);
987 return get_tarval_overflow(buffer, a->length, a->mode);
989 case irms_float_number:
990 fc_neg(a->value, NULL);
991 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1001 tarval *tarval_add(tarval *a, tarval *b)
1008 assert(a->mode == b->mode);
1010 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
1011 /* vector arithmetic not implemented yet */
1015 switch (get_mode_sort(a->mode))
1017 case irms_character:
1018 case irms_int_number:
1019 /* modes of a,b are equal, so result has mode of a as this might be the character */
1020 buffer = alloca(sc_get_buffer_length());
1021 sc_add(a->value, b->value, buffer);
1022 return get_tarval_overflow(buffer, a->length, a->mode);
1024 case irms_float_number:
1025 fc_add(a->value, b->value, NULL);
1026 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1036 tarval *tarval_sub(tarval *a, tarval *b)
1043 assert(a->mode == b->mode);
1045 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
1046 /* vector arithmetic not implemented yet */
1049 switch (get_mode_sort(a->mode))
1051 case irms_character:
1052 case irms_int_number:
1053 /* modes of a,b are equal, so result has mode of a as this might be the character */
1054 buffer = alloca(sc_get_buffer_length());
1055 sc_sub(a->value, b->value, buffer);
1056 return get_tarval_overflow(buffer, a->length, a->mode);
1058 case irms_float_number:
1059 fc_sub(a->value, b->value, NULL);
1060 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1070 tarval *tarval_mul(tarval *a, tarval *b)
1077 assert(a->mode == b->mode);
1079 if (get_mode_n_vector_elems(a->mode) > 1) {
1080 /* vector arithmetic not implemented yet */
1084 switch (get_mode_sort(a->mode))
1086 case irms_int_number:
1087 /* modes of a,b are equal */
1088 buffer = alloca(sc_get_buffer_length());
1089 sc_mul(a->value, b->value, buffer);
1090 return get_tarval_overflow(buffer, a->length, a->mode);
1092 case irms_float_number:
1093 fc_mul(a->value, b->value, NULL);
1094 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1102 * floating point division
1104 tarval *tarval_quo(tarval *a, tarval *b)
1109 assert((a->mode == b->mode) && mode_is_float(a->mode));
1111 if (get_mode_n_vector_elems(a->mode) > 1) {
1112 /* vector arithmetic not implemented yet */
1116 fc_div(a->value, b->value, NULL);
1117 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1122 * overflow is impossible, but look out for division by zero
1124 tarval *tarval_div(tarval *a, tarval *b)
1129 assert((a->mode == b->mode) && mode_is_int(a->mode));
1131 if (get_mode_n_vector_elems(a->mode) > 1) {
1132 /* vector arithmetic not implemented yet */
1137 if (b == get_mode_null(b->mode)) return tarval_bad;
1138 /* modes of a,b are equal */
1139 sc_div(a->value, b->value, NULL);
1140 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1145 * overflow is impossible, but look out for division by zero
1147 tarval *tarval_mod(tarval *a, tarval *b)
1152 assert((a->mode == b->mode) && mode_is_int(a->mode));
1154 if (get_mode_n_vector_elems(a->mode) > 1) {
1155 /* vector arithmetic not implemented yet */
1160 if (b == get_mode_null(b->mode)) return tarval_bad;
1161 /* modes of a,b are equal */
1162 sc_mod(a->value, b->value, NULL);
1163 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1169 tarval *tarval_abs(tarval *a)
1175 assert(mode_is_num(a->mode));
1177 if (get_mode_n_vector_elems(a->mode) > 1) {
1178 /* vector arithmetic not implemented yet */
1182 switch (get_mode_sort(a->mode))
1184 case irms_int_number:
1185 if (sc_comp(a->value, get_mode_null(a->mode)->value) == -1)
1187 buffer = alloca(sc_get_buffer_length());
1188 sc_neg(a->value, buffer);
1189 return get_tarval_overflow(buffer, a->length, a->mode);
1193 case irms_float_number:
1194 if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1)
1196 fc_neg(a->value, NULL);
1197 return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
1210 tarval *tarval_and(tarval *a, tarval *b)
1215 assert(a->mode == b->mode);
1217 /* works even for vector modes */
1219 switch(get_mode_sort(a->mode))
1221 case irms_internal_boolean:
1222 return (a == tarval_b_false) ? a : b;
1224 case irms_int_number:
1225 sc_and(a->value, b->value, NULL);
1226 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1229 assert(0 && "operation not defined on mode");
1237 tarval *tarval_or (tarval *a, tarval *b)
1242 assert(a->mode == b->mode);
1244 /* works even for vector modes */
1246 switch (get_mode_sort(a->mode))
1248 case irms_internal_boolean:
1249 return (a == tarval_b_true) ? a : b;
1251 case irms_int_number:
1252 sc_or(a->value, b->value, NULL);
1253 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1256 assert(0 && "operation not defined on mode");
1262 * bitwise exclusive or (xor)
1264 tarval *tarval_eor(tarval *a, tarval *b)
1269 assert((a->mode == b->mode));
1271 /* works even for vector modes */
1273 switch (get_mode_sort(a->mode))
1275 case irms_internal_boolean:
1276 return (a == b)? tarval_b_false : tarval_b_true;
1278 case irms_int_number:
1279 sc_xor(a->value, b->value, NULL);
1280 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1283 assert(0 && "operation not defined on mode");
1289 * bitwise left shift
1291 tarval *tarval_shl(tarval *a, tarval *b)
1293 char *temp_val = NULL;
1297 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1299 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1300 /* vector arithmetic not implemented yet */
1304 if (get_mode_modulo_shift(a->mode) != 0)
1306 temp_val = alloca(sc_get_buffer_length());
1308 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1309 sc_mod(b->value, temp_val, temp_val);
1312 temp_val = (char*)b->value;
1314 sc_shl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1315 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1319 * bitwise unsigned right shift
1321 tarval *tarval_shr(tarval *a, tarval *b)
1323 char *temp_val = NULL;
1327 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1329 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1330 /* vector arithmetic not implemented yet */
1334 if (get_mode_modulo_shift(a->mode) != 0)
1336 temp_val = alloca(sc_get_buffer_length());
1338 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1339 sc_mod(b->value, temp_val, temp_val);
1342 temp_val = (char*)b->value;
1344 sc_shr(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1345 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1349 * bitwise signed right shift
1351 tarval *tarval_shrs(tarval *a, tarval *b)
1353 char *temp_val = NULL;
1357 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1359 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1360 /* vector arithmetic not implemented yet */
1364 if (get_mode_modulo_shift(a->mode) != 0)
1366 temp_val = alloca(sc_get_buffer_length());
1368 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1369 sc_mod(b->value, temp_val, temp_val);
1372 temp_val = (char*)b->value;
1374 sc_shrs(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1375 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1381 tarval *tarval_rot(tarval *a, tarval *b)
1383 char *temp_val = NULL;
1387 assert(mode_is_int(a->mode) && mode_is_int(b->mode));
1389 if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(a->mode) > 1) {
1390 /* vector arithmetic not implemented yet */
1394 if (get_mode_modulo_shift(a->mode) != 0)
1396 temp_val = alloca(sc_get_buffer_length());
1398 sc_val_from_ulong(get_mode_modulo_shift(a->mode), temp_val);
1399 sc_mod(b->value, temp_val, temp_val);
1402 temp_val = (char*)b->value;
1404 sc_rot(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
1405 return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
1409 * carry flag of the last operation
1411 int tarval_carry(void)
1413 return sc_had_carry();
1419 int tarval_snprintf(char *buf, size_t len, tarval *tv)
1421 static const tarval_mode_info default_info = { TVO_NATIVE, NULL, NULL };
1425 const tarval_mode_info *mode_info;
1426 const char *prefix, *suffix;
1430 mode_info = tv->mode->tv_priv;
1432 mode_info = &default_info;
1433 prefix = mode_info->mode_prefix ? mode_info->mode_prefix : "";
1434 suffix = mode_info->mode_suffix ? mode_info->mode_suffix : "";
1436 switch (get_mode_sort(tv->mode))
1438 case irms_int_number:
1439 case irms_character:
1440 switch (mode_info->mode_output) {
1443 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_DEC);
1447 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_OCT);
1453 str = sc_print(tv->value, get_mode_size_bits(tv->mode), SC_HEX);
1456 return snprintf(buf, len, "%s%s%s", prefix, str, suffix);
1458 case irms_float_number:
1459 switch (mode_info->mode_output) {
1461 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_PACKED), suffix);
1464 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_HEX), suffix);
1469 return snprintf(buf, len, "%s%s%s", prefix, fc_print(tv->value, tv_buf, sizeof(tv_buf), FC_DEC), suffix);
1473 case irms_reference:
1474 if (tv == tarval_P_void) return snprintf(buf, len, "NULL");
1475 if (tv->value != NULL){
1476 if (len > tv->length) {
1477 memcpy(buf, tv->value, tv->length);
1478 buf[tv->length] = '\0';
1482 memcpy(buf, tv->value, len-1);
1488 return snprintf(buf, len, "void");
1490 case irms_internal_boolean:
1491 switch (mode_info->mode_output) {
1497 return snprintf(buf, len, "%s%c%s", prefix, (tv == tarval_b_true) ? '1' : '0', suffix);
1501 return snprintf(buf, len, "%s%s%s", prefix, (tv == tarval_b_true) ? "true" : "false", suffix);
1504 case irms_control_flow:
1506 case irms_auxiliary:
1507 return snprintf(buf, len, "<TV_OVERFLOW_BAD>");
1515 * Output of tarvals to stdio.
1517 int tarval_printf(tarval *tv) {
1521 res = tarval_snprintf(buf, sizeof(buf), tv);
1522 assert(res < sizeof(buf) && "buffer to small for tarval_snprintf");
1528 char *get_tarval_bitpattern(tarval *tv)
1531 int n = get_mode_size_bits(tv->mode);
1532 int bytes = (n + 7) / 8;
1533 char *res = malloc((n + 1) * sizeof(char));
1536 for(i = 0; i < bytes; i++) {
1537 byte = get_tarval_sub_bits(tv, i);
1538 for(j = 1; j < 256; j <<= 1)
1540 res[pos++] = j & byte ? '1' : '0';
1549 * access to the bitpattern
1551 unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs)
1553 switch (get_mode_sort(tv->mode)) {
1554 case irms_int_number:
1555 case irms_character:
1556 return sc_sub_bits(tv->value, tv->length, byte_ofs);
1558 case irms_float_number:
1559 return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
1567 * Specify the output options of one mode.
1569 * This functions stores the modinfo, so DO NOT DESTROY it.
1571 * Returns zero on success.
1573 int set_tarval_mode_output_option(ir_mode *mode, const tarval_mode_info *modeinfo)
1577 mode->tv_priv = modeinfo;
1582 * Returns the output options of one mode.
1584 * This functions returns the modinfo of a given mode.
1586 const tarval_mode_info *get_tarval_mode_output_option(ir_mode *mode)
1590 return mode->tv_priv;
1594 * Identifying tarvals values for algebraic simplifications.
1597 * - TV_CLASSIFY_NULL for additive neutral,
1598 * - TV_CLASSIFY_ONE for multiplicative neutral,
1599 * - TV_CLASSIFY_ALL_ONE for bitwise-and neutral
1600 * - TV_CLASSIFY_OTHER else
1602 tarval_classification_t classify_tarval(tarval *tv)
1605 if (!tv || tv == tarval_bad) return TV_CLASSIFY_OTHER;
1607 if (tv == get_mode_null(tv->mode))
1608 return TV_CLASSIFY_NULL;
1609 else if (tv == get_mode_one(tv->mode))
1610 return TV_CLASSIFY_ONE;
1611 else if ((get_mode_sort(tv->mode) == irms_int_number)
1612 && (tv == new_tarval_from_long(-1, tv->mode)))
1613 return TV_CLASSIFY_ALL_ONE;
1615 return TV_CLASSIFY_OTHER;
1619 * Sets the overflow mode for integer operations.
1621 void tarval_set_integer_overflow_mode(tarval_int_overflow_mode_t ov_mode) {
1622 int_overflow_mode = ov_mode;
1626 * Get the overflow mode for integer operations.
1628 tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void) {
1629 return int_overflow_mode;
1633 * default mode_info for output as HEX
1635 static const tarval_mode_info hex_output = {
1642 * default mode_info for output as reference
1644 static const tarval_mode_info reference_output = {
1652 * Initialization of the tarval module: called before init_mode()
1654 void init_tarval_1(void)
1657 /* initialize the sets holding the tarvals with a comparison function and
1658 * an initial size, which is the expected number of constants */
1659 tarvals = new_set(memcmp, N_CONSTANTS);
1660 values = new_set(memcmp, N_CONSTANTS);
1661 /* init strcalc with precision of 68 to support floating point values with 64
1662 * bit mantissa (needs extra bits for rounding and overflow) */
1668 * Initialization of the tarval module: called after init_mode()
1670 void init_tarval_2(void)
1674 tarval_bad->mode = mode_BAD;
1675 tarval_undefined->mode = mode_ANY;
1676 tarval_b_true->mode = mode_b;
1677 tarval_b_false->mode = mode_b;
1678 tarval_P_void->mode = mode_P;
1681 * assign output modes that are compatible with the
1682 * old implementation: Hex output
1684 set_tarval_mode_output_option(mode_U, &hex_output);
1685 set_tarval_mode_output_option(mode_C, &hex_output);
1686 set_tarval_mode_output_option(mode_Bs, &hex_output);
1687 set_tarval_mode_output_option(mode_Bu, &hex_output);
1688 set_tarval_mode_output_option(mode_Hs, &hex_output);
1689 set_tarval_mode_output_option(mode_Hu, &hex_output);
1690 set_tarval_mode_output_option(mode_Is, &hex_output);
1691 set_tarval_mode_output_option(mode_Iu, &hex_output);
1692 set_tarval_mode_output_option(mode_Ls, &hex_output);
1693 set_tarval_mode_output_option(mode_Lu, &hex_output);
1694 set_tarval_mode_output_option(mode_P, &reference_output);
1697 /* free all memory occupied by tarval. */
1698 void finish_tarval(void) {
1701 del_set(tarvals); tarvals = NULL;
1702 del_set(values); values = NULL;
1705 /****************************************************************************
1707 ****************************************************************************/