return hash;
}
+static int cmp_tv(const void *p1, const void *p2, size_t n) {
+ const tarval *tv1 = p1;
+ const tarval *tv2 = p2;
+ (void) n;
+
+ assert(tv1->kind == k_tarval);
+ assert(tv2->kind == k_tarval);
+ if(tv1->mode < tv2->mode)
+ return -1;
+ if(tv1->mode > tv2->mode)
+ return 1;
+ if(tv1->length < tv2->length)
+ return -1;
+ if(tv1->length > tv2->length)
+ return 1;
+ if(tv1->value < tv2->value)
+ return -1;
+ if(tv1->value > tv2->value)
+ return 1;
+
+ return 0;
+}
+
/** finds tarval with value/mode or creates new tarval */
static tarval *get_tarval(const void *value, int length, ir_mode *mode) {
tarval tv;
/*
* public variables declared in tv.h
*/
-static tarval reserved_tv[4];
+static tarval reserved_tv[6];
-tarval *tarval_bad = &reserved_tv[0];
-tarval *tarval_undefined = &reserved_tv[1];
-tarval *tarval_b_false = &reserved_tv[2];
-tarval *tarval_b_true = &reserved_tv[3];
+tarval *tarval_b_false = &reserved_tv[0];
+tarval *tarval_b_true = &reserved_tv[1];
+tarval *tarval_bad = &reserved_tv[2];
+tarval *tarval_undefined = &reserved_tv[3];
+tarval *tarval_reachable = &reserved_tv[4];
+tarval *tarval_unreachable = &reserved_tv[5];
/*
* public functions declared in tv.h
case irms_internal_boolean:
/* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
- if (strcasecmp(str, "true")) return tarval_b_true;
- else if (strcasecmp(str, "false")) return tarval_b_true;
+ if (strcasecmp(str, "true"))
+ return tarval_b_true;
+ else if (strcasecmp(str, "false"))
+ return tarval_b_true;
else
/* XXX This is C semantics */
return atoi(str) ? tarval_b_true : tarval_b_false;
return _get_tarval_b_true();
}
+tarval *(get_tarval_reachable)(void) {
+ return _get_tarval_reachable();
+}
+
+tarval *(get_tarval_unreachable)(void) {
+ return _get_tarval_unreachable();
+}
+
tarval *get_tarval_max(ir_mode *mode) {
assert(mode);
return tarval_bad;
}
+int tarval_is_constant(tarval *tv) {
+ int num_res = sizeof(reserved_tv) / sizeof(reserved_tv[0]);
+
+ /* reserved tarvals are NOT constants. Note that although
+ tarval_b_true and tarval_b_false are reserved, they are constants of course. */
+ return (tv < &reserved_tv[2] || tv > &reserved_tv[num_res - 1]);
+}
+
tarval *get_tarval_minus_one(ir_mode *mode) {
assert(mode);
assert(src);
assert(dst_mode);
- if (src->mode == dst_mode) return src;
+ if (src->mode == dst_mode)
+ return src;
if (get_mode_n_vector_elems(src->mode) > 1) {
/* vector arithmetic not implemented yet */
res = fc_rnd(src->value, NULL);
break;
default:
- assert(0);
+ panic("Unsupported float to int conversion mode in tarval_convert_to()");
break;
}
buffer = alloca(sc_get_buffer_length());
* addition
*/
tarval *tarval_add(tarval *a, tarval *b) {
- char *buffer;
+ tarval *res;
+ char *buffer;
+ ir_mode *dst_mode, *src_mode = NULL;
assert(a);
assert(b);
- assert(a->mode == b->mode);
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
}
+ if (mode_is_reference(a->mode)) {
+ src_mode = a->mode;
+ dst_mode = find_unsigned_mode(a->mode);
+
+ if (dst_mode == NULL)
+ return tarval_bad;
+
+ a = tarval_convert_to(a, dst_mode);
+ b = tarval_convert_to(b, dst_mode);
+ }
+ if (mode_is_reference(b->mode)) {
+ src_mode = b->mode;
+ dst_mode = find_unsigned_mode(b->mode);
+
+ if (dst_mode == 0)
+ return tarval_bad;
+
+ a = tarval_convert_to(a, dst_mode);
+ b = tarval_convert_to(b, dst_mode);
+ }
+
+ assert(a->mode == b->mode);
+
switch (get_mode_sort(a->mode)) {
case irms_int_number:
/* modes of a,b are equal, so result has mode of a as this might be the character */
buffer = alloca(sc_get_buffer_length());
sc_add(a->value, b->value, buffer);
- return get_tarval_overflow(buffer, a->length, a->mode);
+ res = get_tarval_overflow(buffer, a->length, a->mode);
+ break;
case irms_float_number:
if (no_float)
return tarval_bad;
fc_add(a->value, b->value, NULL);
- return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ res = get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ break;
default:
return tarval_bad;
}
+ if (src_mode != NULL)
+ return tarval_convert_to(res, src_mode);
+ return res;
}
/*
* subtraction
*/
tarval *tarval_sub(tarval *a, tarval *b) {
- char *buffer;
+ tarval *res;
+ char *buffer;
+ ir_mode *dst_mode, *src_mode = NULL;
assert(a);
assert(b);
- assert(a->mode == b->mode);
if (get_mode_n_vector_elems(a->mode) > 1 || get_mode_n_vector_elems(b->mode) > 1) {
/* vector arithmetic not implemented yet */
return tarval_bad;
}
+ if (mode_is_reference(a->mode)) {
+ src_mode = a->mode;
+ dst_mode = find_unsigned_mode(a->mode);
+
+ if (dst_mode == NULL)
+ return tarval_bad;
+
+ a = tarval_convert_to(a, dst_mode);
+ b = tarval_convert_to(b, dst_mode);
+ }
+ if (mode_is_reference(b->mode)) {
+ src_mode = b->mode;
+ dst_mode = find_unsigned_mode(b->mode);
+
+ if (dst_mode == 0)
+ return tarval_bad;
+
+ a = tarval_convert_to(a, dst_mode);
+ b = tarval_convert_to(b, dst_mode);
+ }
+
+ assert(a->mode == b->mode);
+
switch (get_mode_sort(a->mode)) {
case irms_int_number:
/* modes of a,b are equal, so result has mode of a as this might be the character */
buffer = alloca(sc_get_buffer_length());
sc_sub(a->value, b->value, buffer);
- return get_tarval_overflow(buffer, a->length, a->mode);
+ res = get_tarval_overflow(buffer, a->length, a->mode);
+ break;
case irms_float_number:
if (no_float)
return tarval_bad;
fc_sub(a->value, b->value, NULL);
- return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ res = get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
+ break;
default:
return tarval_bad;
}
+ if (src_mode != NULL)
+ return tarval_convert_to(res, src_mode);
+ return res;
}
/*
/*
* bitwise or
*/
-tarval *tarval_or (tarval *a, tarval *b) {
+tarval *tarval_or(tarval *a, tarval *b) {
assert(a);
assert(b);
assert(a->mode == b->mode);
}
/*
- * bitwise rotation
+ * bitwise rotation to left
*/
-tarval *tarval_rot(tarval *a, tarval *b) {
+tarval *tarval_rotl(tarval *a, tarval *b) {
char *temp_val = NULL;
assert(a);
} else
temp_val = (char*)b->value;
- sc_rot(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
+ sc_rotl(a->value, temp_val, get_mode_size_bits(a->mode), mode_is_signed(a->mode), NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
* carry flag of the last operation
*/
int tarval_carry(void) {
+ panic("tarval_carry() requetsed: not implemented on all operations");
return sc_had_carry();
}
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- return snprintf(buf, len, "<TV_OVERFLOW_BAD>");
+ if (tv == tarval_bad)
+ return snprintf(buf, len, "<TV_BAD>");
+ if (tv == tarval_undefined)
+ return snprintf(buf, len, "<TV_UNDEF>");
+ if (tv == tarval_unreachable)
+ return snprintf(buf, len, "<TV_UNREACHABLE>");
+ if (tv == tarval_reachable)
+ return snprintf(buf, len, "<TV_REACHABLE>");
+ return snprintf(buf, len, "<TV_??""?>");
}
return 0;
return fc_get_exponent(tv->value);
}
+/*
+ * Check if the tarval can be converted to the given mode without
+ * precision loss.
+ */
+int tarval_ieee754_can_conv_lossless(tarval *tv, ir_mode *mode) {
+ char exp_size, mant_size;
+ switch (get_mode_size_bits(mode)) {
+ case 32:
+ exp_size = 8; mant_size = 23;
+ break;
+ case 64:
+ exp_size = 11; mant_size = 52;
+ break;
+ case 80:
+ case 96:
+ exp_size = 15; mant_size = 64;
+ break;
+ default:
+ panic("Unsupported mode in tarval_ieee754_can_conv_lossless()");
+ return 0;
+ }
+ return fc_can_lossless_conv_to(tv->value, exp_size, mant_size);
+}
+
/* Set the immediate precision for IEEE-754 results. */
unsigned tarval_ieee754_set_immediate_precision(unsigned bits) {
return fc_set_immediate_precision(bits);
* Initialization of the tarval module: called before init_mode()
*/
void init_tarval_1(long null_value) {
+ /* if these assertion fail, tarval_is_constant() will follow ... */
+ assert(tarval_b_false == &reserved_tv[0] && "b_false MUST be the first reserved tarval!");
+ assert(tarval_b_true == &reserved_tv[1] && "b_true MUST be the second reserved tarval!");
+
_null_value = null_value;
/* initialize the sets holding the tarvals with a comparison function and
* an initial size, which is the expected number of constants */
- tarvals = new_set(memcmp, N_CONSTANTS);
+ tarvals = new_set(cmp_tv, N_CONSTANTS);
values = new_set(memcmp, N_CONSTANTS);
/* init strcalc with precision of 68 to support floating point values with 64
* bit mantissa (needs extra bits for rounding and overflow) */
* Initialization of the tarval module: called after init_mode()
*/
void init_tarval_2(void) {
- tarval_bad->kind = k_tarval;
- tarval_bad->mode = mode_BAD;
- tarval_bad->value = INT_TO_PTR(resid_tarval_bad);
+ tarval_bad->kind = k_tarval;
+ tarval_bad->mode = mode_BAD;
+ tarval_bad->value = INT_TO_PTR(resid_tarval_bad);
- tarval_undefined->kind = k_tarval;
- tarval_undefined->mode = mode_ANY;
- tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined);
+ tarval_undefined->kind = k_tarval;
+ tarval_undefined->mode = mode_ANY;
+ tarval_undefined->value = INT_TO_PTR(resid_tarval_undefined);
- tarval_b_true->kind = k_tarval;
- tarval_b_true->mode = mode_b;
- tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true);
+ tarval_b_true->kind = k_tarval;
+ tarval_b_true->mode = mode_b;
+ tarval_b_true->value = INT_TO_PTR(resid_tarval_b_true);
- tarval_b_false->kind = k_tarval;
- tarval_b_false->mode = mode_b;
- tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false);
+ tarval_b_false->kind = k_tarval;
+ tarval_b_false->mode = mode_b;
+ tarval_b_false->value = INT_TO_PTR(resid_tarval_b_false);
+
+ tarval_unreachable->kind = k_tarval;
+ tarval_unreachable->mode = mode_X;
+ tarval_unreachable->value = INT_TO_PTR(resid_tarval_unreachable);
+
+ tarval_reachable->kind = k_tarval;
+ tarval_reachable->mode = mode_X;
+ tarval_reachable->value = INT_TO_PTR(resid_tarval_reachable);
/*
* assign output modes that are compatible with the
del_set(values); values = NULL;
}
+int (is_tarval)(const void *thing) {
+ return _is_tarval(thing);
+}
+
/****************************************************************************
* end of tv.c
****************************************************************************/
projects / libfirm / blobdiff