@@ -3883,6 +3883,17 @@ float128 QEMU_FLATTEN float128_sqrt(float128 a, float_status *status)
return float128_round_pack_canonical(&p, status);
}
+floatx80 floatx80_sqrt(floatx80 a, float_status *s)
+{
+ FloatParts128 p;
+
+ if (!floatx80_unpack_canonical(&p, a, s)) {
+ return floatx80_default_nan(s);
+ }
+ parts_sqrt(&p, s, &floatx80_params[s->floatx80_rounding_precision]);
+ return floatx80_round_pack_canonical(&p, s);
+}
+
/*----------------------------------------------------------------------------
| The pattern for a default generated NaN.
*----------------------------------------------------------------------------*/
@@ -6046,77 +6057,6 @@ floatx80 floatx80_mod(floatx80 a, floatx80 b, float_status *status)
return floatx80_modrem(a, b, true, "ient, status);
}
-/*----------------------------------------------------------------------------
-| Returns the square root of the extended double-precision floating-point
-| value `a'. The operation is performed according to the IEC/IEEE Standard
-| for Binary Floating-Point Arithmetic.
-*----------------------------------------------------------------------------*/
-
-floatx80 floatx80_sqrt(floatx80 a, float_status *status)
-{
- bool aSign;
- int32_t aExp, zExp;
- uint64_t aSig0, aSig1, zSig0, zSig1, doubleZSig0;
- uint64_t rem0, rem1, rem2, rem3, term0, term1, term2, term3;
-
- if (floatx80_invalid_encoding(a)) {
- float_raise(float_flag_invalid, status);
- return floatx80_default_nan(status);
- }
- aSig0 = extractFloatx80Frac( a );
- aExp = extractFloatx80Exp( a );
- aSign = extractFloatx80Sign( a );
- if ( aExp == 0x7FFF ) {
- if ((uint64_t)(aSig0 << 1)) {
- return propagateFloatx80NaN(a, a, status);
- }
- if ( ! aSign ) return a;
- goto invalid;
- }
- if ( aSign ) {
- if ( ( aExp | aSig0 ) == 0 ) return a;
- invalid:
- float_raise(float_flag_invalid, status);
- return floatx80_default_nan(status);
- }
- if ( aExp == 0 ) {
- if ( aSig0 == 0 ) return packFloatx80( 0, 0, 0 );
- normalizeFloatx80Subnormal( aSig0, &aExp, &aSig0 );
- }
- zExp = ( ( aExp - 0x3FFF )>>1 ) + 0x3FFF;
- zSig0 = estimateSqrt32( aExp, aSig0>>32 );
- shift128Right( aSig0, 0, 2 + ( 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 & UINT64_C(0x3FFFFFFFFFFFFFFF) ) <= 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 );
- }
- shortShift128Left( 0, zSig1, 1, &zSig0, &zSig1 );
- zSig0 |= doubleZSig0;
- return roundAndPackFloatx80(status->floatx80_rounding_precision,
- 0, zExp, zSig0, zSig1, status);
-}
-
/*----------------------------------------------------------------------------
| Returns the result of converting the quadruple-precision floating-point
| value `a' to the extended double-precision floating-point format. The
Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- fpu/softfloat.c | 82 +++++++------------------------------------------ 1 file changed, 11 insertions(+), 71 deletions(-)