/*
- * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
+ * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
*
* This file is part of libFirm.
*
#include "irtools.h"
#include "xmalloc.h"
#include "firm_common.h"
+#include "error.h"
/** Size of hash tables. Should correspond to average number of distinct constant
target values */
static struct set *values = NULL; /* container for values */
static tarval_int_overflow_mode_t int_overflow_mode = TV_OVERFLOW_WRAP;
-static int no_float = 1;
+/** if this is set non-zero, the constant folding for floating point is OFF */
+static int no_float = 0;
/****************************************************************************
* private functions
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;
if (length > 0) {
/* if there already is such a value, it is returned, else value
* is copied into the set */
- tv.value = INSERT_VALUE(value, length);
+ char *temp = alloca(length);
+ memcpy(temp, value, length);
+ if (get_mode_arithmetic(mode) == irma_twos_complement) {
+ sign_extend(temp, mode);
+ }
+ tv.value = INSERT_VALUE(temp, length);
} else {
tv.value = value;
}
*/
static tarval *get_tarval_overflow(const void *value, int length, ir_mode *mode)
{
+ char *temp;
+
switch (get_mode_sort(mode)) {
+ case irms_reference:
+ /* addresses always wrap around */
+ temp = alloca(sc_get_buffer_length());
+ memcpy(temp, value, sc_get_buffer_length());
+ sc_truncate(get_mode_size_bits(mode), temp);
+ /* the sc_ module expects that all bits are set ... */
+ sign_extend(temp, mode);
+ return get_tarval(temp, length, mode);
+
case irms_int_number:
if (sc_comp(value, get_mode_max(mode)->value) == 1) {
switch (GET_OVERFLOW_MODE()) {
case TV_OVERFLOW_SATURATE:
return get_mode_max(mode);
case TV_OVERFLOW_WRAP:
- {
- char *temp = alloca(sc_get_buffer_length());
- sc_val_from_ulong(-1, temp);
- sc_and(temp, value, temp);
- /* the sc_ module expects that all bits are set ... */
- sign_extend(temp, mode);
- return get_tarval(temp, length, mode);
- }
+ temp = alloca(sc_get_buffer_length());
+ memcpy(temp, value, sc_get_buffer_length());
+ sc_truncate(get_mode_size_bits(mode), temp);
+ /* the sc_ module expects that all bits are set ... */
+ sign_extend(temp, mode);
+ return get_tarval(temp, length, mode);
case TV_OVERFLOW_BAD:
return tarval_bad;
default:
return get_mode_min(mode);
case TV_OVERFLOW_WRAP: {
char *temp = alloca(sc_get_buffer_length());
- sc_val_from_ulong(-1, temp);
- sc_and(temp, value, temp);
+ memcpy(temp, value, sc_get_buffer_length());
+ sc_truncate(get_mode_size_bits(mode), temp);
return get_tarval(temp, length, mode);
}
case TV_OVERFLOW_BAD:
case irms_float_number:
if (SWITCH_NOINFINITY && fc_is_inf(value)) {
- return fc_is_negative(value)?get_mode_min(mode):get_mode_max(mode);
+ /* clip infinity to maximum value */
+ return fc_is_negative(value) ? get_mode_min(mode) : get_mode_max(mode);
}
if (SWITCH_NODENORMALS && fc_is_subnormal(value)) {
+ /* clip denormals to zero */
return get_mode_null(mode);
}
break;
return atoi(str) ? tarval_b_true : tarval_b_false;
case irms_float_number:
- switch(get_mode_size_bits(mode)) {
+ switch (get_mode_size_bits(mode)) {
case 32:
fc_val_from_str(str, len, 8, 23, NULL);
break;
fc_val_from_str(str, len, 11, 52, NULL);
break;
case 80:
+ case 96:
fc_val_from_str(str, len, 15, 64, NULL);
break;
+ default:
+ panic("Unsupported mode in new_tarval_from_str()");
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
- case irms_reference:
- /* same as integer modes */
- case irms_int_number:
- case irms_character:
- sc_val_from_str(str, len, NULL, mode);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
+ case irms_reference:
+ /* same as integer modes */
+ case irms_int_number:
+ sc_val_from_str(str, len, NULL, mode);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
}
assert(0); /* can't be reached, can it? */
tarval *new_tarval_from_long(long l, ir_mode *mode) {
assert(mode);
- switch(get_mode_sort(mode)) {
+ switch (get_mode_sort(mode)) {
case irms_internal_boolean:
/* XXX C semantics ! */
return l ? tarval_b_true : tarval_b_false ;
case irms_reference:
/* same as integer modes */
case irms_int_number:
- case irms_character:
sc_val_from_long(l, NULL);
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
/* returns non-zero if can be converted to long */
int tarval_is_long(tarval *tv) {
- mode_sort sort = get_mode_sort(tv->mode);
-
- if (sort != irms_int_number && sort != irms_character) return 0;
+ if (!mode_is_int(tv->mode) && !mode_is_reference(tv->mode))
+ return 0;
if (get_mode_size_bits(tv->mode) > (int) (sizeof(long) << 3)) {
/* the value might be too big to fit in a long */
switch (get_mode_size_bits(mode)) {
case 32:
- fc_val_from_float(d, 8, 23, NULL);
+ fc_val_from_ieee754(d, 8, 23, NULL);
break;
case 64:
- fc_val_from_float(d, 11, 52, NULL);
+ fc_val_from_ieee754(d, 11, 52, NULL);
break;
case 80:
- fc_val_from_float(d, 15, 64, NULL);
+ case 96:
+ fc_val_from_ieee754(d, 15, 64, NULL);
break;
+ default:
+ panic("Unsupported mode in new_tarval_from_double()");
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
}
long double get_tarval_double(tarval *tv) {
assert(tarval_is_double(tv));
- return fc_val_to_float(tv->value);
+ return fc_val_to_ieee754(tv->value);
}
* value.
* The functions get_mode_{Max,Min,...} return tarvals retrieved from these
* functions, but these are stored on initialization of the irmode module and
- * therefore the irmode functions should be prefered to the functions below.
+ * therefore the irmode functions should be preferred to the functions below.
*/
tarval *(get_tarval_bad)(void) {
}
switch(get_mode_sort(mode)) {
- case irms_reference:
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
fc_get_max(11, 52, NULL);
break;
case 80:
+ case 96:
fc_get_max(15, 64, NULL);
break;
+ default:
+ panic("Unsupported mode in get_tarval_max()");
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
- case irms_int_number:
- case irms_character:
- sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
+ case irms_reference:
+ case irms_int_number:
+ sc_max_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
}
return tarval_bad;
}
}
switch(get_mode_sort(mode)) {
- case irms_reference:
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
fc_get_min(11, 52, NULL);
break;
case 80:
+ case 96:
fc_get_min(15, 64, NULL);
break;
+ default:
+ panic("Unsupported mode in get_tarval_min()");
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
- case irms_int_number:
- case irms_character:
- sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
- return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
+ case irms_reference:
+ case irms_int_number:
+ sc_min_from_bits(get_mode_size_bits(mode), mode_is_signed(mode), NULL);
+ return get_tarval(sc_get_buffer(), sc_get_buffer_length(), mode);
}
return tarval_bad;
}
/** The bit pattern for the pointer NULL */
-static long _null_value;
+static long _null_value = 0;
tarval *get_tarval_null(ir_mode *mode) {
assert(mode);
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- case irms_internal_boolean:
assert(0);
break;
case irms_float_number:
return new_tarval_from_double(0.0, mode);
+ case irms_internal_boolean:
case irms_int_number:
- case irms_character:
return new_tarval_from_long(0l, mode);
case irms_reference:
if (get_mode_n_vector_elems(mode) > 1) {
/* vector arithmetic not implemented yet */
+ assert(0);
return tarval_bad;
}
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- case irms_internal_boolean:
- case irms_reference:
assert(0);
break;
+ case irms_internal_boolean:
+ return tarval_b_true;
+
case irms_float_number:
return new_tarval_from_double(1.0, mode);
+ case irms_reference:
case irms_int_number:
- case irms_character:
return new_tarval_from_long(1l, mode);
- break;
}
return tarval_bad;
}
-tarval *get_tarval_minus_one(ir_mode *mode) {
+tarval *get_tarval_all_one(ir_mode *mode) {
assert(mode);
if (get_mode_n_vector_elems(mode) > 1) {
/* vector arithmetic not implemented yet */
+ assert(0);
return tarval_bad;
}
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
+ assert(0);
+ return tarval_bad;
+
+ case irms_int_number:
case irms_internal_boolean:
case irms_reference:
+ return tarval_not(get_mode_null(mode));
+
+
+ case irms_float_number:
+ return new_tarval_from_double(1.0, mode);
+ }
+ return tarval_bad;
+}
+
+tarval *get_tarval_minus_one(ir_mode *mode) {
+ assert(mode);
+
+ if (get_mode_n_vector_elems(mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
+ switch(get_mode_sort(mode)) {
+ case irms_control_flow:
+ case irms_memory:
+ case irms_auxiliary:
+ case irms_internal_boolean:
assert(0);
break;
+ case irms_reference:
+ return tarval_bad;
+
case irms_float_number:
return mode_is_signed(mode) ? new_tarval_from_double(-1.0, mode) : tarval_bad;
case irms_int_number:
- case irms_character:
- return mode_is_signed(mode) ? new_tarval_from_long(-1l, mode) : tarval_bad;
+ return new_tarval_from_long(-1l, mode);
}
return tarval_bad;
}
fc_get_qnan(11, 52, NULL);
break;
case 80:
+ case 96:
fc_get_qnan(15, 64, NULL);
break;
+ default:
+ panic("Unsupported mode in get_tarval_nan()");
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
} else {
fc_get_plusinf(11, 52, NULL);
break;
case 80:
+ case 96:
fc_get_plusinf(15, 64, NULL);
break;
+ default:
+ panic("Unsupported mode in get_tarval_plus_inf()");
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
} else {
fc_get_minusinf(11, 52, NULL);
break;
case 80:
+ case 96:
fc_get_minusinf(15, 64, NULL);
break;
+ default:
+ panic("Unsupported mode in get_tarval_minus_inf()");
}
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
} else {
return sc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
case irms_float_number:
- return fc_comp(a->value, get_mode_null(a->mode)->value) == -1 ? 1 : 0;
+ return fc_is_negative(a->value);
default:
assert(0 && "not implemented");
* test if null, 1 means 'yes'
*/
int tarval_is_null(tarval *a) {
- ir_mode *m = get_tarval_mode(a);
-
- return a == get_tarval_null(m);
+ return
+ a != tarval_bad &&
+ a == get_mode_null(get_tarval_mode(a));
}
/*
* test if one, 1 means 'yes'
*/
int tarval_is_one(tarval *a) {
- ir_mode *m = get_tarval_mode(a);
+ return
+ a != tarval_bad &&
+ a == get_mode_one(get_tarval_mode(a));
+}
- return a == get_tarval_one(m);
+int tarval_is_all_one(tarval *tv) {
+ return
+ tv != tarval_bad &&
+ tv == get_mode_all_one(get_tarval_mode(tv));
+}
+
+/*
+ * test if one, 1 means 'yes'
+ */
+int tarval_is_minus_one(tarval *a) {
+ return
+ a != tarval_bad &&
+ a == get_mode_minus_one(get_tarval_mode(a));
}
/*
case irms_control_flow:
case irms_memory:
case irms_auxiliary:
- case irms_reference:
if (a == b)
return pn_Cmp_Eq;
return pn_Cmp_False;
case irms_float_number:
- if(no_float)
- return pn_Cmp_False;
+ /* it should be safe to enable this even if other arithmetic is disabled */
+ /*if (no_float)
+ return pn_Cmp_False;*/
/*
* BEWARE: we cannot compare a == b here, because
* a NaN is always Unordered to any other value, even to itself!
case 2: return pn_Cmp_Uo;
default: return pn_Cmp_False;
}
+ case irms_reference:
case irms_int_number:
- case irms_character:
if (a == b)
return pn_Cmp_Eq;
return sc_comp(a->value, b->value) == 1 ? pn_Cmp_Gt : pn_Cmp_Lt;
/*
* convert to other mode
*/
-tarval *tarval_convert_to(tarval *src, ir_mode *m) {
+tarval *tarval_convert_to(tarval *src, ir_mode *dst_mode) {
char *buffer;
+ fp_value *res;
assert(src);
- assert(m);
+ assert(dst_mode);
- if (src->mode == m) return src;
+ if (src->mode == dst_mode) return src;
if (get_mode_n_vector_elems(src->mode) > 1) {
/* vector arithmetic not implemented yet */
/* cast float to something */
case irms_float_number:
- switch (get_mode_sort(m)) {
+ switch (get_mode_sort(dst_mode)) {
case irms_float_number:
- switch (get_mode_size_bits(m)) {
+ switch (get_mode_size_bits(dst_mode)) {
case 32:
fc_cast(src->value, 8, 23, NULL);
break;
fc_cast(src->value, 11, 52, NULL);
break;
case 80:
+ case 96:
fc_cast(src->value, 15, 64, NULL);
break;
default:
- break;
+ panic("Unsupported mode in tarval_convert_to()");
}
- return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m);
+ return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
case irms_int_number:
switch (GET_FLOAT_TO_INT_MODE()) {
case TRUNCATE:
- fc_int(src->value, NULL);
+ res = fc_int(src->value, NULL);
break;
case ROUND:
- fc_rnd(src->value, NULL);
+ res = fc_rnd(src->value, NULL);
break;
default:
- assert(0);
+ panic("Unsupported float to int conversion mode in tarval_convert_to()");
break;
}
- /* FIXME: floating point unit can't produce a value in integer
- * representation
- * an intermediate representation is needed here first. */
- /* return get_tarval(); */
- return tarval_bad;
+ buffer = alloca(sc_get_buffer_length());
+ if (! fc_flt2int(res, buffer, dst_mode))
+ return tarval_bad;
+ return get_tarval(buffer, sc_get_buffer_length(), dst_mode);
default:
/* the rest can't be converted */
/* cast int/characters to something */
case irms_int_number:
- case irms_character:
- switch (get_mode_sort(m)) {
+ switch (get_mode_sort(dst_mode)) {
+
+ case irms_reference:
case irms_int_number:
- case irms_character:
buffer = alloca(sc_get_buffer_length());
memcpy(buffer, src->value, sc_get_buffer_length());
- sign_extend(buffer, m);
- return get_tarval_overflow(buffer, src->length, m);
+ sign_extend(buffer, dst_mode);
+ return get_tarval_overflow(buffer, src->length, dst_mode);
case irms_internal_boolean:
/* XXX C semantics */
snprintf(buffer, 100, "%s",
sc_print(src->value, get_mode_size_bits(src->mode), SC_DEC, mode_is_signed(src->mode)));
buffer[100 - 1] = '\0';
- switch (get_mode_size_bits(m)) {
+ switch (get_mode_size_bits(dst_mode)) {
case 32:
fc_val_from_str(buffer, 0, 8, 23, NULL);
break;
fc_val_from_str(buffer, 0, 11, 52, NULL);
break;
case 80:
+ case 96:
fc_val_from_str(buffer, 0, 15, 64, NULL);
break;
+ default:
+ panic("Unsupported mode in tarval_convert_to()");
}
- return get_tarval(fc_get_buffer(), fc_get_buffer_length(), m);
-
- case irms_reference:
- /* allow 0 to be casted */
- if (src == get_mode_null(src->mode))
- return get_mode_null(m);
- break;
+ return get_tarval(fc_get_buffer(), fc_get_buffer_length(), dst_mode);
default:
break;
break;
case irms_internal_boolean:
- switch (get_mode_sort(m)) {
- case irms_int_number:
- if (src == tarval_b_true) return get_mode_one(m);
- else return get_mode_null(m);
-
- default:
- break;
- }
+ /* beware: this is C semantic for the INTERNAL boolean mode */
+ if (get_mode_sort(dst_mode) == irms_int_number)
+ return src == tarval_b_true ? get_mode_one(dst_mode) : get_mode_null(dst_mode);
break;
case irms_reference:
- switch(get_mode_sort(m)) {
- case irms_int_number:
+ if (get_mode_sort(dst_mode) == irms_int_number) {
buffer = alloca(sc_get_buffer_length());
memcpy(buffer, src->value, sc_get_buffer_length());
sign_extend(buffer, src->mode);
- return get_tarval_overflow(buffer, src->length, m);
- default:
- break;
+ return get_tarval_overflow(buffer, src->length, dst_mode);
}
-
break;
}
/* works for vector mode without changes */
switch (get_mode_sort(a->mode)) {
+ case irms_reference:
case irms_int_number:
buffer = alloca(sc_get_buffer_length());
sc_not(a->value, buffer);
return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- if(no_float)
- return tarval_bad;
+ /* it should be safe to enable this even if other arithmetic is disabled */
+ /*if (no_float)
+ return tarval_bad;*/
fc_neg(a->value, NULL);
return get_tarval_overflow(fc_get_buffer(), fc_get_buffer_length(), a->mode);
}
switch (get_mode_sort(a->mode)) {
- case irms_character:
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());
return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- if(no_float)
+ if (no_float)
return tarval_bad;
fc_add(a->value, b->value, NULL);
return tarval_bad;
}
switch (get_mode_sort(a->mode)) {
- case irms_character:
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());
return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- if(no_float)
+ if (no_float)
return tarval_bad;
fc_sub(a->value, b->value, NULL);
return get_tarval_overflow(buffer, a->length, a->mode);
case irms_float_number:
- if(no_float)
+ if (no_float)
return tarval_bad;
fc_mul(a->value, b->value, NULL);
assert(b);
assert((a->mode == b->mode) && mode_is_float(a->mode));
- if(no_float)
+ if (no_float)
return tarval_bad;
if (get_mode_n_vector_elems(a->mode) > 1) {
return get_tarval(sc_get_buffer(), sc_get_buffer_length(), a->mode);
}
+/*
+ * integer division AND remainder
+ * overflow is impossible, but look out for division by zero
+ */
+tarval *tarval_divmod(tarval *a, tarval *b, tarval **mod) {
+ int len = sc_get_buffer_length();
+ char *div_res = alloca(len);
+ char *mod_res = alloca(len);
+
+ assert(a);
+ assert(b);
+ assert((a->mode == b->mode) && mode_is_int(a->mode));
+
+ if (get_mode_n_vector_elems(a->mode) > 1) {
+ /* vector arithmetic not implemented yet */
+ return tarval_bad;
+ }
+
+
+ /* x/0 error */
+ if (b == get_mode_null(b->mode)) return tarval_bad;
+ /* modes of a,b are equal */
+ sc_divmod(a->value, b->value, div_res, mod_res);
+ *mod = get_tarval(mod_res, len, a->mode);
+ return get_tarval(div_res, len, a->mode);
+}
+
/*
* absolute value
*/
return a;
case irms_float_number:
- if(no_float)
- return tarval_bad;
+ /* it should be safe to enable this even if other arithmetic is disabled */
+ /*if (no_float)
+ return tarval_bad;*/
if (fc_comp(a->value, get_mode_null(a->mode)->value) == -1) {
fc_neg(a->value, NULL);
* carry flag of the last operation
*/
int tarval_carry(void) {
+ panic("tarval_carry() requetsed: not implemented on all operations");
return sc_had_carry();
}
if (tv == tv->mode->null) return snprintf(buf, len, "NULL");
/* fall through */
case irms_int_number:
- case irms_character:
switch (mode_info->mode_output) {
case TVO_DECIMAL:
* access to the bitpattern
*/
unsigned char get_tarval_sub_bits(tarval *tv, unsigned byte_ofs) {
- switch (get_mode_sort(tv->mode)) {
- case irms_int_number:
- case irms_character:
- return sc_sub_bits(tv->value, tv->length, byte_ofs);
-
- case irms_float_number:
+ switch (get_mode_arithmetic(tv->mode)) {
+ case irma_twos_complement:
+ return sc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
+ case irma_ieee754:
return fc_sub_bits(tv->value, get_mode_size_bits(tv->mode), byte_ofs);
-
default:
- return 0;
+ panic("get_tarval_sub_bits(): arithmetic mode not supported");
}
}
return mode->tv_priv;
}
-/*
- * Identifying tarvals values for algebraic simplifications.
- *
- * Returns:
- * - TV_CLASSIFY_NULL for additive neutral or the NULL tarval for reference modes,
- * - TV_CLASSIFY_ONE for multiplicative neutral,
- * - TV_CLASSIFY_ALL_ONE for bitwise-and neutral
- * - TV_CLASSIFY_OTHER else
- */
-tarval_classification_t classify_tarval(tarval *tv) {
- if (!tv || tv == tarval_bad) return TV_CLASSIFY_OTHER;
-
- if (tv == get_mode_null(tv->mode))
- return TV_CLASSIFY_NULL;
- else if (tv == get_mode_one(tv->mode))
- return TV_CLASSIFY_ONE;
- else if ((get_mode_sort(tv->mode) == irms_int_number)
- && (tv == new_tarval_from_long(-1, tv->mode)))
- return TV_CLASSIFY_ALL_ONE;
-
- return TV_CLASSIFY_OTHER;
-}
-
/*
* Returns non-zero if a given (integer) tarval has only one single bit
* set.
*/
-int is_single_bit_tarval(tarval *tv) {
+int tarval_is_single_bit(tarval *tv) {
int i, l;
int bits;
return bits;
}
+/*
+ * Returns non-zero if the mantissa of a floating point IEEE-754
+ * tarval is zero (i.e. 1.0Exxx)
+ */
+int tarval_ieee754_zero_mantissa(tarval *tv) {
+ assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
+ return fc_zero_mantissa(tv->value);
+}
+
+/* Returns the exponent of a floating point IEEE-754 tarval. */
+int tarval_ieee754_get_exponent(tarval *tv) {
+ assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
+ 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);
+}
+
+/* Returns non-zero if the result of the last IEEE-754 operation was exact. */
+unsigned tarval_ieee754_get_exact(void) {
+ return fc_is_exact();
+}
+
+/* check if its the a floating point NaN */
+int tarval_is_NaN(tarval *tv) {
+ if (! mode_is_float(tv->mode))
+ return 0;
+ return fc_is_nan(tv->value);
+}
+
+/* check if its the a floating point +inf */
+int tarval_is_plus_inf(tarval *tv) {
+ if (! mode_is_float(tv->mode))
+ return 0;
+ return fc_is_inf(tv->value) && !fc_is_negative(tv->value);
+}
+
+/* check if its the a floating point -inf */
+int tarval_is_minus_inf(tarval *tv) {
+ if (! mode_is_float(tv->mode))
+ return 0;
+ return fc_is_inf(tv->value) && fc_is_negative(tv->value);
+}
+
+/* check if the tarval represents a finite value */
+int tarval_is_finite(tarval *tv) {
+ if (mode_is_float(tv->mode))
+ return !fc_is_nan(tv->value) && !fc_is_inf(tv->value);
+ return 1;
+}
+
/*
* Sets the overflow mode for integer operations.
*/
int_overflow_mode = ov_mode;
}
-/**
- * Get the overflow mode for integer operations.
- */
+/* Get the overflow mode for integer operations. */
tarval_int_overflow_mode_t tarval_get_integer_overflow_mode(void) {
return int_overflow_mode;
}
+/* Enable/Disable floating point constant folding. */
+int tarval_enable_fp_ops(int enable) {
+ int old = !no_float;
+
+ no_float = !enable;
+ return old;
+}
+
/**
* default mode_info for output as HEX
*/
/* 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) */
* assign output modes that are compatible with the
* old implementation: Hex output
*/
- set_tarval_mode_output_option(mode_U, &hex_output);
- set_tarval_mode_output_option(mode_C, &hex_output);
set_tarval_mode_output_option(mode_Bs, &hex_output);
set_tarval_mode_output_option(mode_Bu, &hex_output);
set_tarval_mode_output_option(mode_Hs, &hex_output);
set_tarval_mode_output_option(mode_Ls, &hex_output);
set_tarval_mode_output_option(mode_Lu, &hex_output);
set_tarval_mode_output_option(mode_P, &hex_output);
- }
+}
/* free all memory occupied by tarval. */
void finish_tarval(void) {
- finish_strcalc ();
- finish_fltcalc ();
+ finish_strcalc();
+ finish_fltcalc();
del_set(tarvals); tarvals = NULL;
del_set(values); values = NULL;
}
projects / libfirm / blobdiff