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softfloat: Convert floatx80 float conversions to FloatParts

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This is the last use of commonNaNT and all of the routines
that use it, so remove all of them for Werror.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson
2020-11-21 18:02:23 -08:00
parent 5f9529006e
commit 8ae5719cd4
2 changed files with 67 additions and 384 deletions
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175
fpu/softfloat-specialize.c.inc
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@ -256,14 +256,6 @@ floatx80 floatx80_default_nan(float_status *status)
const floatx80 floatx80_infinity
= make_floatx80_init(floatx80_infinity_high, floatx80_infinity_low);
/*----------------------------------------------------------------------------
| Internal canonical NaN format.
*----------------------------------------------------------------------------*/
typedef struct {
bool sign;
uint64_t high, low;
} commonNaNT;
/*----------------------------------------------------------------------------
| Returns 1 if the half-precision floating-point value `a' is a quiet
| NaN; otherwise returns 0.
@ -379,46 +371,6 @@ bool float32_is_signaling_nan(float32 a_, float_status *status)
}
}
/*----------------------------------------------------------------------------
| Returns the result of converting the single-precision floating-point NaN
| `a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
| exception is raised.
*----------------------------------------------------------------------------*/
static commonNaNT float32ToCommonNaN(float32 a, float_status *status)
{
commonNaNT z;
if (float32_is_signaling_nan(a, status)) {
float_raise(float_flag_invalid, status);
}
z.sign = float32_val(a) >> 31;
z.low = 0;
z.high = ((uint64_t)float32_val(a)) << 41;
return z;
}
/*----------------------------------------------------------------------------
| Returns the result of converting the canonical NaN `a' to the single-
| precision floating-point format.
*----------------------------------------------------------------------------*/
static float32 commonNaNToFloat32(commonNaNT a, float_status *status)
{
uint32_t mantissa = a.high >> 41;
if (status->default_nan_mode) {
return float32_default_nan(status);
}
if (mantissa) {
return make_float32(
(((uint32_t)a.sign) << 31) | 0x7F800000 | (a.high >> 41));
} else {
return float32_default_nan(status);
}
}
/*----------------------------------------------------------------------------
| Select which NaN to propagate for a two-input operation.
| IEEE754 doesn't specify all the details of this, so the
@ -785,48 +737,6 @@ bool float64_is_signaling_nan(float64 a_, float_status *status)
}
}
/*----------------------------------------------------------------------------
| Returns the result of converting the double-precision floating-point NaN
| `a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
| exception is raised.
*----------------------------------------------------------------------------*/
static commonNaNT float64ToCommonNaN(float64 a, float_status *status)
{
commonNaNT z;
if (float64_is_signaling_nan(a, status)) {
float_raise(float_flag_invalid, status);
}
z.sign = float64_val(a) >> 63;
z.low = 0;
z.high = float64_val(a) << 12;
return z;
}
/*----------------------------------------------------------------------------
| Returns the result of converting the canonical NaN `a' to the double-
| precision floating-point format.
*----------------------------------------------------------------------------*/
static float64 commonNaNToFloat64(commonNaNT a, float_status *status)
{
uint64_t mantissa = a.high >> 12;
if (status->default_nan_mode) {
return float64_default_nan(status);
}
if (mantissa) {
return make_float64(
(((uint64_t) a.sign) << 63)
| UINT64_C(0x7FF0000000000000)
| (a.high >> 12));
} else {
return float64_default_nan(status);
}
}
/*----------------------------------------------------------------------------
| Takes two double-precision floating-point values `a' and `b', one of which
| is a NaN, and returns the appropriate NaN result. If either `a' or `b' is a
@ -946,55 +856,6 @@ floatx80 floatx80_silence_nan(floatx80 a, float_status *status)
return a;
}
/*----------------------------------------------------------------------------
| Returns the result of converting the extended double-precision floating-
| point NaN `a' to the canonical NaN format. If `a' is a signaling NaN, the
| invalid exception is raised.
*----------------------------------------------------------------------------*/
static commonNaNT floatx80ToCommonNaN(floatx80 a, float_status *status)
{
floatx80 dflt;
commonNaNT z;
if (floatx80_is_signaling_nan(a, status)) {
float_raise(float_flag_invalid, status);
}
if (a.low >> 63) {
z.sign = a.high >> 15;
z.low = 0;
z.high = a.low << 1;
} else {
dflt = floatx80_default_nan(status);
z.sign = dflt.high >> 15;
z.low = 0;
z.high = dflt.low << 1;
}
return z;
}
/*----------------------------------------------------------------------------
| Returns the result of converting the canonical NaN `a' to the extended
| double-precision floating-point format.
*----------------------------------------------------------------------------*/
static floatx80 commonNaNToFloatx80(commonNaNT a, float_status *status)
{
floatx80 z;
if (status->default_nan_mode) {
return floatx80_default_nan(status);
}
if (a.high >> 1) {
z.low = UINT64_C(0x8000000000000000) | a.high >> 1;
z.high = (((uint16_t)a.sign) << 15) | 0x7FFF;
} else {
z = floatx80_default_nan(status);
}
return z;
}
/*----------------------------------------------------------------------------
| Takes two extended double-precision floating-point values `a' and `b', one
| of which is a NaN, and returns the appropriate NaN result. If either `a' or
@ -1087,42 +948,6 @@ bool float128_is_signaling_nan(float128 a, float_status *status)
}
}
/*----------------------------------------------------------------------------
| Returns the result of converting the quadruple-precision floating-point NaN
| `a' to the canonical NaN format. If `a' is a signaling NaN, the invalid
| exception is raised.
*----------------------------------------------------------------------------*/
static commonNaNT float128ToCommonNaN(float128 a, float_status *status)
{
commonNaNT z;
if (float128_is_signaling_nan(a, status)) {
float_raise(float_flag_invalid, status);
}
z.sign = a.high >> 63;
shortShift128Left(a.high, a.low, 16, &z.high, &z.low);
return z;
}
/*----------------------------------------------------------------------------
| Returns the result of converting the canonical NaN `a' to the quadruple-
| precision floating-point format.
*----------------------------------------------------------------------------*/
static float128 commonNaNToFloat128(commonNaNT a, float_status *status)
{
float128 z;
if (status->default_nan_mode) {
return float128_default_nan(status);
}
shift128Right(a.high, a.low, 16, &z.high, &z.low);
z.high |= (((uint64_t)a.sign) << 63) | UINT64_C(0x7FFF000000000000);
return z;
}
/*----------------------------------------------------------------------------
| Takes two quadruple-precision floating-point values `a' and `b', one of
| which is a NaN, and returns the appropriate NaN result. If either `a' or