Add float16 support.
Signed-off-by: Richard Henderson <richard.hender...@linaro.org>
---
include/fpu/softfloat.h | 1 +
fpu/floatxx.inc.c | 16 +++++
fpu/softfloat.c | 179 ------------------------------------------------
3 files changed, 17 insertions(+), 179 deletions(-)
diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h
index 95590d8420..0aae0454e2 100644
--- a/include/fpu/softfloat.h
+++ b/include/fpu/softfloat.h
@@ -250,6 +250,7 @@ float16 float16_add(float16, float16, float_status *status);
float16 float16_sub(float16, float16, float_status *status);
float16 float16_mul(float16, float16, float_status *status);
float16 float16_div(float16, float16, float_status *status);
+float16 float16_sqrt(float16, float_status *status);
int float16_eq(float16, float16, float_status *status);
int float16_le(float16, float16, float_status *status);
int float16_lt(float16, float16, float_status *status);
diff --git a/fpu/floatxx.inc.c b/fpu/floatxx.inc.c
index 0b6b8b4fd3..7a7f53dd5d 100644
--- a/fpu/floatxx.inc.c
+++ b/fpu/floatxx.inc.c
@@ -101,6 +101,22 @@ FLOATXX glue(FLOATXX,_div)(FLOATXX a, FLOATXX b,
float_status *status)
return r;
}
+FLOATXX glue(FLOATXX,_sqrt)(FLOATXX a, float_status *status)
+{
+ FP_DECL_EX;
+ glue(FP_DECL_, FS)(A);
+ glue(FP_DECL_, FS)(R);
+ FLOATXX r;
+
+ FP_INIT_ROUNDMODE;
+ glue(FP_UNPACK_, FS)(A, a);
+ glue(FP_SQRT_, FS)(R, A);
+ glue(FP_PACK_, FS)(r, R);
+ FP_HANDLE_EXCEPTIONS;
+
+ return r;
+}
+
#define DO_FLOAT_TO_INT(NAME, SZ, FP_TO_INT_WHICH) \
int##SZ##_t NAME(FLOATXX a, float_status *status) \
{ \
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 68dfb464d5..83995cc60f 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -1783,63 +1783,6 @@ float32 float32_muladd(float32 a, float32 b, float32 c,
int flags,
}
-/*----------------------------------------------------------------------------
-| Returns the square root of the single-precision floating-point value `a'.
-| The operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float32 float32_sqrt(float32 a, float_status *status)
-{
- flag aSign;
- int aExp, zExp;
- uint32_t aSig, zSig;
- uint64_t rem, term;
- a = float32_squash_input_denormal(a, status);
-
- aSig = extractFloat32Frac( a );
- aExp = extractFloat32Exp( a );
- aSign = extractFloat32Sign( a );
- if ( aExp == 0xFF ) {
- if (aSig) {
- return propagateFloat32NaN(a, float32_zero, status);
- }
- if ( ! aSign ) return a;
- float_raise(float_flag_invalid, status);
- return float32_default_nan(status);
- }
- if ( aSign ) {
- if ( ( aExp | aSig ) == 0 ) return a;
- float_raise(float_flag_invalid, status);
- return float32_default_nan(status);
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return float32_zero;
- normalizeFloat32Subnormal( aSig, &aExp, &aSig );
- }
- zExp = ( ( aExp - 0x7F )>>1 ) + 0x7E;
- aSig = ( aSig | 0x00800000 )<<8;
- zSig = estimateSqrt32( aExp, aSig ) + 2;
- if ( ( zSig & 0x7F ) <= 5 ) {
- if ( zSig < 2 ) {
- zSig = 0x7FFFFFFF;
- goto roundAndPack;
- }
- aSig >>= aExp & 1;
- term = ( (uint64_t) zSig ) * zSig;
- rem = ( ( (uint64_t) aSig )<<32 ) - term;
- while ( (int64_t) rem < 0 ) {
- --zSig;
- rem += ( ( (uint64_t) zSig )<<1 ) | 1;
- }
- zSig |= ( rem != 0 );
- }
- shift32RightJamming( zSig, 1, &zSig );
- roundAndPack:
- return roundAndPackFloat32(0, zExp, zSig, status);
-
-}
-
/*----------------------------------------------------------------------------
| Returns the binary exponential of the single-precision floating-point value
| `a'. The operation is performed according to the IEC/IEEE Standard for
@@ -2804,60 +2747,6 @@ float64 float64_muladd(float64 a, float64 b, float64 c,
int flags,
}
}
-/*----------------------------------------------------------------------------
-| Returns the square root of the double-precision floating-point value `a'.
-| The operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float64 float64_sqrt(float64 a, float_status *status)
-{
- flag aSign;
- int aExp, zExp;
- uint64_t aSig, zSig, doubleZSig;
- uint64_t rem0, rem1, term0, term1;
- a = float64_squash_input_denormal(a, status);
-
- aSig = extractFloat64Frac( a );
- aExp = extractFloat64Exp( a );
- aSign = extractFloat64Sign( a );
- if ( aExp == 0x7FF ) {
- if (aSig) {
- return propagateFloat64NaN(a, a, status);
- }
- if ( ! aSign ) return a;
- float_raise(float_flag_invalid, status);
- return float64_default_nan(status);
- }
- if ( aSign ) {
- if ( ( aExp | aSig ) == 0 ) return a;
- float_raise(float_flag_invalid, status);
- return float64_default_nan(status);
- }
- if ( aExp == 0 ) {
- if ( aSig == 0 ) return float64_zero;
- normalizeFloat64Subnormal( aSig, &aExp, &aSig );
- }
- zExp = ( ( aExp - 0x3FF )>>1 ) + 0x3FE;
- aSig |= LIT64( 0x0010000000000000 );
- zSig = estimateSqrt32( aExp, aSig>>21 );
- aSig <<= 9 - ( aExp & 1 );
- zSig = estimateDiv128To64( aSig, 0, zSig<<32 ) + ( zSig<<30 );
- if ( ( zSig & 0x1FF ) <= 5 ) {
- doubleZSig = zSig<<1;
- mul64To128( zSig, zSig, &term0, &term1 );
- sub128( aSig, 0, term0, term1, &rem0, &rem1 );
- while ( (int64_t) rem0 < 0 ) {
- --zSig;
- doubleZSig -= 2;
- add128( rem0, rem1, zSig>>63, doubleZSig | 1, &rem0, &rem1 );
- }
- zSig |= ( ( rem0 | rem1 ) != 0 );
- }
- return roundAndPackFloat64(0, zExp, zSig, status);
-
-}
-
/*----------------------------------------------------------------------------
| Returns the binary log of the double-precision floating-point value `a'.
| The operation is performed according to the IEC/IEEE Standard for Binary
@@ -4139,74 +4028,6 @@ float128 float128_rem(float128 a, float128 b,
float_status *status)
status);
}
-/*----------------------------------------------------------------------------
-| Returns the square root of the quadruple-precision floating-point value `a'.
-| The operation is performed according to the IEC/IEEE Standard for Binary
-| Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-float128 float128_sqrt(float128 a, float_status *status)
-{
- flag aSign;
- int32_t aExp, zExp;
- uint64_t aSig0, aSig1, zSig0, zSig1, zSig2, doubleZSig0;
- uint64_t rem0, rem1, rem2, rem3, term0, term1, term2, term3;
-
- aSig1 = extractFloat128Frac1( a );
- aSig0 = extractFloat128Frac0( a );
- aExp = extractFloat128Exp( a );
- aSign = extractFloat128Sign( a );
- if ( aExp == 0x7FFF ) {
- if (aSig0 | aSig1) {
- return propagateFloat128NaN(a, a, status);
- }
- if ( ! aSign ) return a;
- goto invalid;
- }
- if ( aSign ) {
- if ( ( aExp | aSig0 | aSig1 ) == 0 ) return a;
- invalid:
- float_raise(float_flag_invalid, status);
- return float128_default_nan(status);
- }
- if ( aExp == 0 ) {
- if ( ( aSig0 | aSig1 ) == 0 ) return packFloat128( 0, 0, 0, 0 );
- normalizeFloat128Subnormal( aSig0, aSig1, &aExp, &aSig0, &aSig1 );
- }
- zExp = ( ( aExp - 0x3FFF )>>1 ) + 0x3FFE;
- aSig0 |= LIT64( 0x0001000000000000 );
- zSig0 = estimateSqrt32( aExp, aSig0>>17 );
- shortShift128Left( aSig0, aSig1, 13 - ( aExp & 1 ), &aSig0, &aSig1 );
- zSig0 = estimateDiv128To64( aSig0, aSig1, zSig0<<32 ) + ( zSig0<<30 );
- doubleZSig0 = zSig0<<1;
- mul64To128( zSig0, zSig0, &term0, &term1 );
- sub128( aSig0, aSig1, term0, term1, &rem0, &rem1 );
- while ( (int64_t) rem0 < 0 ) {
- --zSig0;
- doubleZSig0 -= 2;
- add128( rem0, rem1, zSig0>>63, doubleZSig0 | 1, &rem0, &rem1 );
- }
- zSig1 = estimateDiv128To64( rem1, 0, doubleZSig0 );
- if ( ( zSig1 & 0x1FFF ) <= 5 ) {
- if ( zSig1 == 0 ) zSig1 = 1;
- mul64To128( doubleZSig0, zSig1, &term1, &term2 );
- sub128( rem1, 0, term1, term2, &rem1, &rem2 );
- mul64To128( zSig1, zSig1, &term2, &term3 );
- sub192( rem1, rem2, 0, 0, term2, term3, &rem1, &rem2, &rem3 );
- while ( (int64_t) rem1 < 0 ) {
- --zSig1;
- shortShift128Left( 0, zSig1, 1, &term2, &term3 );
- term3 |= 1;
- term2 |= doubleZSig0;
- add192( rem1, rem2, rem3, 0, term2, term3, &rem1, &rem2, &rem3 );
- }
- zSig1 |= ( ( rem1 | rem2 | rem3 ) != 0 );
- }
- shift128ExtraRightJamming( zSig0, zSig1, 0, 14, &zSig0, &zSig1, &zSig2 );
- return roundAndPackFloat128(0, zExp, zSig0, zSig1, zSig2, status);
-
-}
-
static inline int floatx80_compare_internal(floatx80 a, floatx80 b,
int is_quiet, float_status *status)
{
--
2.14.3
