/** if this is set non-zero, the constant folding for floating point is OFF */
static int no_float = 0;
-/** IEEE-754r half precision */
-static const ieee_descriptor_t half_desc = { 5, 10, 0 };
-/** IEEE-754 single precision */
-static const ieee_descriptor_t single_desc = { 8, 23, 0 };
-/** IEEE-754 double precision */
-static const ieee_descriptor_t double_desc = { 11, 52, 0 };
-/** Intel x87 extended precision */
-static const ieee_descriptor_t extended_desc = { 15, 63, 1 };
-
-/** IEEE-754r quad precision */
-static const ieee_descriptor_t quad_desc = { 15, 112, 0 };
-
/****************************************************************************
* private functions
****************************************************************************/
/**
* get the float descriptor for given mode.
*/
-static const ieee_descriptor_t *get_descriptor(const ir_mode *mode)
-{
- switch (get_mode_size_bits(mode)) {
- case 16: return &half_desc;
- case 32: return &single_desc;
- case 64: return &double_desc;
- case 80:
- case 96:
- case 128: return &extended_desc; /* FIXME: HACK for x86 where we have
- sizeof(long double)==16 with 10 byte
- real payload */
- /* case 128: return &quad_desc; */
- default:
- (void) quad_desc;
- panic("Unsupported mode in get_descriptor()");
- }
+static const float_descriptor_t *get_descriptor(const ir_mode *mode)
+{
+ return &mode->float_desc;
}
ir_tarval *new_integer_tarval_from_str(const char *str, size_t len, char sign,
*/
ir_tarval *new_tarval_from_str(const char *str, size_t len, ir_mode *mode)
{
- const ieee_descriptor_t *desc;
+ const float_descriptor_t *desc;
assert(str);
assert(len);
assert(mode);
switch (get_mode_sort(mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- panic("Unsupported tarval creation with mode %F", mode);
-
case irms_internal_boolean:
/* match [tT][rR][uU][eE]|[fF][aA][lL][sS][eE] */
if (!strcasecmp(str, "true"))
/* FALLTHROUGH */
case irms_int_number:
return new_tarval_from_str_int(str, len, mode);
+ default:
+ panic("Unsupported tarval creation with mode %F", mode);
}
- panic("Unsupported tarval creation with mode %F", mode);
}
/*
ir_tarval *new_tarval_from_long_double(long double d, ir_mode *mode)
{
- const ieee_descriptor_t *desc;
+ const float_descriptor_t *desc;
assert(mode && (get_mode_sort(mode) == irms_float_number));
desc = get_descriptor(mode);
ir_tarval *get_tarval_max(ir_mode *mode)
{
- const ieee_descriptor_t *desc;
+ const float_descriptor_t *desc;
switch (get_mode_sort(mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- panic("mode %F does not support maximum value", mode);
-
case irms_internal_boolean:
return tarval_b_true;
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);
+ default:
+ panic("mode %F does not support maximum value", mode);
}
- return tarval_bad;
}
ir_tarval *get_tarval_min(ir_mode *mode)
{
- const ieee_descriptor_t *desc;
+ const float_descriptor_t *desc;
switch (get_mode_sort(mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- panic("mode %F does not support minimum value", mode);
-
case irms_internal_boolean:
return tarval_b_false;
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);
+ default:
+ panic("mode %F does not support minimum value", mode);
}
- return tarval_bad;
}
/** The bit pattern for the pointer NULL */
ir_tarval *get_tarval_null(ir_mode *mode)
{
switch (get_mode_sort(mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- panic("mode %F does not support null value", mode);
-
case irms_float_number:
return new_tarval_from_double(0.0, mode);
case irms_reference:
return new_tarval_from_long(_null_value, mode);
+ default:
+ panic("mode %F does not support null value", mode);
}
- return tarval_bad;
}
ir_tarval *get_tarval_one(ir_mode *mode)
{
switch (get_mode_sort(mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- panic("mode %F does not support one value", mode);
-
case irms_internal_boolean:
return tarval_b_true;
case irms_reference:
case irms_int_number:
return new_tarval_from_long(1l, mode);
+ default:
+ panic("mode %F does not support one value", mode);
}
- return tarval_bad;
}
ir_tarval *get_tarval_all_one(ir_mode *mode)
{
switch (get_mode_sort(mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- panic("mode %F does not support all-one value", mode);
-
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);
+
+ default:
+ panic("mode %F does not support all-one value", mode);
}
- return tarval_bad;
}
int tarval_is_constant(ir_tarval *tv)
ir_tarval *get_tarval_minus_one(ir_mode *mode)
{
switch (get_mode_sort(mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- case irms_internal_boolean:
- panic("mode %F does not support minus one value", mode);
-
case irms_reference:
return tarval_bad;
case irms_int_number:
return new_tarval_from_long(-1l, mode);
+
+ default:
+ panic("mode %F does not support minus one value", mode);
}
- return tarval_bad;
}
ir_tarval *get_tarval_nan(ir_mode *mode)
{
- const ieee_descriptor_t *desc;
+ const float_descriptor_t *desc;
if (get_mode_sort(mode) == irms_float_number) {
desc = get_descriptor(mode);
ir_tarval *get_tarval_plus_inf(ir_mode *mode)
{
if (get_mode_sort(mode) == irms_float_number) {
- const ieee_descriptor_t *desc = get_descriptor(mode);
+ const float_descriptor_t *desc = get_descriptor(mode);
fc_get_plusinf(desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
} else
ir_tarval *get_tarval_minus_inf(ir_mode *mode)
{
if (get_mode_sort(mode) == irms_float_number) {
- const ieee_descriptor_t *desc = get_descriptor(mode);
+ const float_descriptor_t *desc = get_descriptor(mode);
fc_get_minusinf(desc, NULL);
return get_tarval(fc_get_buffer(), fc_get_buffer_length(), mode);
} else
/* Here the two tarvals are unequal and of the same mode */
switch (get_mode_sort(a->mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- if (a == b)
- return ir_relation_equal;
- return ir_relation_false;
-
case irms_float_number:
/*
* BEWARE: we cannot compare a == b here, because
if (a == b)
return ir_relation_equal;
return a == tarval_b_true ? ir_relation_greater : ir_relation_less;
+
+ default:
+ panic("can't compare values of mode %F", a->mode);
}
- return ir_relation_false;
}
/*
{
char *buffer;
fp_value *res = NULL;
- const ieee_descriptor_t *desc;
+ const float_descriptor_t *desc;
int len;
carry_flag = -1;
return src;
switch (get_mode_sort(src->mode)) {
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- break;
-
- /* cast float to something */
+ /* cast float to something */
case irms_float_number:
switch (get_mode_sort(dst_mode)) {
case irms_float_number:
return get_tarval_overflow(buffer, src->length, dst_mode);
}
break;
+ default:
+ return tarval_bad;
}
return tarval_bad;
return snprintf(buf, len, "%s%s%s", prefix, (tv == tarval_b_true) ? "true" : "false", suffix);
}
- case irms_control_flow:
- case irms_memory:
- case irms_auxiliary:
- 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>");
+ default:
return snprintf(buf, len, "<TV_??""?>");
}
-
- return 0;
}
/**
* Returns non-zero if the mantissa of a floating point IEEE-754
* tarval is zero (i.e. 1.0Exxx)
*/
-int tarval_ieee754_zero_mantissa(ir_tarval *tv)
+int tarval_zero_mantissa(ir_tarval *tv)
{
- assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
+ assert(get_mode_arithmetic(tv->mode) == irma_ieee754
+ || get_mode_arithmetic(tv->mode) == irma_x86_extended_float);
return fc_zero_mantissa((const fp_value*) tv->value);
}
/* Returns the exponent of a floating point IEEE-754 tarval. */
-int tarval_ieee754_get_exponent(ir_tarval *tv)
+int tarval_get_exponent(ir_tarval *tv)
{
- assert(get_mode_arithmetic(tv->mode) == irma_ieee754);
+ assert(get_mode_arithmetic(tv->mode) == irma_ieee754
+ || get_mode_arithmetic(tv->mode) == irma_x86_extended_float);
return fc_get_exponent((const fp_value*) tv->value);
}
*/
int tarval_ieee754_can_conv_lossless(ir_tarval *tv, ir_mode *mode)
{
- const ieee_descriptor_t *desc = get_descriptor(mode);
+ const float_descriptor_t *desc = get_descriptor(mode);
return fc_can_lossless_conv_to((const fp_value*) tv->value, desc);
}
return fc_is_exact();
}
-/* Return the size of the mantissa in bits (including possible
- implicit bits) for the given mode. */
-unsigned tarval_ieee754_get_mantissa_size(const ir_mode *mode)
-{
- const ieee_descriptor_t *desc;
-
- assert(get_mode_arithmetic(mode) == irma_ieee754);
- desc = get_descriptor(mode);
-
- return desc->mantissa_size + desc->explicit_one;
-}
-
/* check if its the a floating point NaN */
int tarval_is_NaN(ir_tarval *tv)
{
projects / libfirm / blobdiff