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softfloat: Inline float128 compare specializations
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Replace the float128 compare specializations with inline functions
that call the standard float128_compare{,_quiet} functions.
Use bool as the return type.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
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rth7680 committed May 19, 2020
1 parent 0673ecd commit b7b1ac6
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Showing 2 changed files with 41 additions and 246 deletions.
238 changes: 0 additions & 238 deletions fpu/softfloat.c
View file
Expand Up @@ -7218,244 +7218,6 @@ float128 float128_sqrt(float128 a, float_status *status)

}

/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point value `a' is equal to
| the corresponding value `b', and 0 otherwise. The invalid exception is
| raised if either operand is a NaN. Otherwise, the comparison is performed
| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/

int float128_eq(float128 a, float128 b, float_status *status)
{

if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
&& ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
|| ( ( extractFloat128Exp( b ) == 0x7FFF )
&& ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
) {
float_raise(float_flag_invalid, status);
return 0;
}
return
( a.low == b.low )
&& ( ( a.high == b.high )
|| ( ( a.low == 0 )
&& ( (uint64_t) ( ( a.high | b.high )<<1 ) == 0 ) )
);

}

/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point value `a' is less than
| or equal to the corresponding value `b', and 0 otherwise. The invalid
| exception is raised if either operand is a NaN. The comparison is performed
| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/

int float128_le(float128 a, float128 b, float_status *status)
{
bool aSign, bSign;

if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
&& ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
|| ( ( extractFloat128Exp( b ) == 0x7FFF )
&& ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
) {
float_raise(float_flag_invalid, status);
return 0;
}
aSign = extractFloat128Sign( a );
bSign = extractFloat128Sign( b );
if ( aSign != bSign ) {
return
aSign
|| ( ( ( (uint64_t) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
== 0 );
}
return
aSign ? le128( b.high, b.low, a.high, a.low )
: le128( a.high, a.low, b.high, b.low );

}

/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point value `a' is less than
| the corresponding value `b', and 0 otherwise. The invalid exception is
| raised if either operand is a NaN. The comparison is performed according
| to the IEC/IEEE Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/

int float128_lt(float128 a, float128 b, float_status *status)
{
bool aSign, bSign;

if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
&& ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
|| ( ( extractFloat128Exp( b ) == 0x7FFF )
&& ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
) {
float_raise(float_flag_invalid, status);
return 0;
}
aSign = extractFloat128Sign( a );
bSign = extractFloat128Sign( b );
if ( aSign != bSign ) {
return
aSign
&& ( ( ( (uint64_t) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
!= 0 );
}
return
aSign ? lt128( b.high, b.low, a.high, a.low )
: lt128( a.high, a.low, b.high, b.low );

}

/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point values `a' and `b' cannot
| be compared, and 0 otherwise. The invalid exception is raised if either
| operand is a NaN. The comparison is performed according to the IEC/IEEE
| Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/

int float128_unordered(float128 a, float128 b, float_status *status)
{
if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
&& ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
|| ( ( extractFloat128Exp( b ) == 0x7FFF )
&& ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
) {
float_raise(float_flag_invalid, status);
return 1;
}
return 0;
}

/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point value `a' is equal to
| the corresponding value `b', and 0 otherwise. Quiet NaNs do not cause an
| exception. The comparison is performed according to the IEC/IEEE Standard
| for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/

int float128_eq_quiet(float128 a, float128 b, float_status *status)
{

if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
&& ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
|| ( ( extractFloat128Exp( b ) == 0x7FFF )
&& ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
) {
if (float128_is_signaling_nan(a, status)
|| float128_is_signaling_nan(b, status)) {
float_raise(float_flag_invalid, status);
}
return 0;
}
return
( a.low == b.low )
&& ( ( a.high == b.high )
|| ( ( a.low == 0 )
&& ( (uint64_t) ( ( a.high | b.high )<<1 ) == 0 ) )
);

}

/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point value `a' is less than
| or equal to the corresponding value `b', and 0 otherwise. Quiet NaNs do not
| cause an exception. Otherwise, the comparison is performed according to the
| IEC/IEEE Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/

int float128_le_quiet(float128 a, float128 b, float_status *status)
{
bool aSign, bSign;

if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
&& ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
|| ( ( extractFloat128Exp( b ) == 0x7FFF )
&& ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
) {
if (float128_is_signaling_nan(a, status)
|| float128_is_signaling_nan(b, status)) {
float_raise(float_flag_invalid, status);
}
return 0;
}
aSign = extractFloat128Sign( a );
bSign = extractFloat128Sign( b );
if ( aSign != bSign ) {
return
aSign
|| ( ( ( (uint64_t) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
== 0 );
}
return
aSign ? le128( b.high, b.low, a.high, a.low )
: le128( a.high, a.low, b.high, b.low );

}

/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point value `a' is less than
| the corresponding value `b', and 0 otherwise. Quiet NaNs do not cause an
| exception. Otherwise, the comparison is performed according to the IEC/IEEE
| Standard for Binary Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/

int float128_lt_quiet(float128 a, float128 b, float_status *status)
{
bool aSign, bSign;

if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
&& ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
|| ( ( extractFloat128Exp( b ) == 0x7FFF )
&& ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
) {
if (float128_is_signaling_nan(a, status)
|| float128_is_signaling_nan(b, status)) {
float_raise(float_flag_invalid, status);
}
return 0;
}
aSign = extractFloat128Sign( a );
bSign = extractFloat128Sign( b );
if ( aSign != bSign ) {
return
aSign
&& ( ( ( (uint64_t) ( ( a.high | b.high )<<1 ) ) | a.low | b.low )
!= 0 );
}
return
aSign ? lt128( b.high, b.low, a.high, a.low )
: lt128( a.high, a.low, b.high, b.low );

}

/*----------------------------------------------------------------------------
| Returns 1 if the quadruple-precision floating-point values `a' and `b' cannot
| be compared, and 0 otherwise. Quiet NaNs do not cause an exception. The
| comparison is performed according to the IEC/IEEE Standard for Binary
| Floating-Point Arithmetic.
*----------------------------------------------------------------------------*/

int float128_unordered_quiet(float128 a, float128 b, float_status *status)
{
if ( ( ( extractFloat128Exp( a ) == 0x7FFF )
&& ( extractFloat128Frac0( a ) | extractFloat128Frac1( a ) ) )
|| ( ( extractFloat128Exp( b ) == 0x7FFF )
&& ( extractFloat128Frac0( b ) | extractFloat128Frac1( b ) ) )
) {
if (float128_is_signaling_nan(a, status)
|| float128_is_signaling_nan(b, status)) {
float_raise(float_flag_invalid, status);
}
return 1;
}
return 0;
}

static inline FloatRelation
floatx80_compare_internal(floatx80 a, floatx80 b, bool is_quiet,
float_status *status)
Expand Down
49 changes: 41 additions & 8 deletions include/fpu/softfloat.h
View file
Expand Up @@ -901,14 +901,6 @@ float128 float128_mul(float128, float128, float_status *status);
float128 float128_div(float128, float128, float_status *status);
float128 float128_rem(float128, float128, float_status *status);
float128 float128_sqrt(float128, float_status *status);
int float128_eq(float128, float128, float_status *status);
int float128_le(float128, float128, float_status *status);
int float128_lt(float128, float128, float_status *status);
int float128_unordered(float128, float128, float_status *status);
int float128_eq_quiet(float128, float128, float_status *status);
int float128_le_quiet(float128, float128, float_status *status);
int float128_lt_quiet(float128, float128, float_status *status);
int float128_unordered_quiet(float128, float128, float_status *status);
FloatRelation float128_compare(float128, float128, float_status *status);
FloatRelation float128_compare_quiet(float128, float128, float_status *status);
int float128_is_quiet_nan(float128, float_status *status);
Expand Down Expand Up @@ -964,6 +956,47 @@ static inline int float128_is_any_nan(float128 a)
((a.low != 0) || ((a.high & 0xffffffffffffLL) != 0));
}

static inline bool float128_eq(float128 a, float128 b, float_status *s)
{
return float128_compare(a, b, s) == float_relation_equal;
}

static inline bool float128_le(float128 a, float128 b, float_status *s)
{
return float128_compare(a, b, s) <= float_relation_equal;
}

static inline bool float128_lt(float128 a, float128 b, float_status *s)
{
return float128_compare(a, b, s) < float_relation_equal;
}

static inline bool float128_unordered(float128 a, float128 b, float_status *s)
{
return float128_compare(a, b, s) == float_relation_unordered;
}

static inline bool float128_eq_quiet(float128 a, float128 b, float_status *s)
{
return float128_compare_quiet(a, b, s) == float_relation_equal;
}

static inline bool float128_le_quiet(float128 a, float128 b, float_status *s)
{
return float128_compare_quiet(a, b, s) <= float_relation_equal;
}

static inline bool float128_lt_quiet(float128 a, float128 b, float_status *s)
{
return float128_compare_quiet(a, b, s) < float_relation_equal;
}

static inline bool float128_unordered_quiet(float128 a, float128 b,
float_status *s)
{
return float128_compare_quiet(a, b, s) == float_relation_unordered;
}

#define float128_zero make_float128(0, 0)

/*----------------------------------------------------------------------------
Expand Down

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