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| author | Richard Henderson <richard.henderson@linaro.org> | 2020-05-04 21:19:39 -0700 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2020-05-19 08:41:16 -0700 |
| commit | a828b373bdabc7e53d1e218e3fc76f85b6674688 (patch) | |
| tree | 883ce3ddef0b43cdc35f8fca6d9f8be79253bcab /fpu | |
| parent | c120391c0090d9c40425c92cdb00f38ea8588ff6 (diff) | |
| download | qemu-a828b373bdabc7e53d1e218e3fc76f85b6674688.zip qemu-a828b373bdabc7e53d1e218e3fc76f85b6674688.tar.gz qemu-a828b373bdabc7e53d1e218e3fc76f85b6674688.tar.bz2 | |
softfloat: Change tininess_before_rounding to bool
Slightly tidies the usage within softfloat.c and the
representation in float_status.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat.c | 54 |
1 files changed, 20 insertions, 34 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index b741cf5..65d457a 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -744,8 +744,7 @@ static FloatParts round_canonical(FloatParts p, float_status *s, p.cls = float_class_zero; goto do_zero; } else { - bool is_tiny = (s->float_detect_tininess - == float_tininess_before_rounding) + bool is_tiny = s->tininess_before_rounding || (exp < 0) || !((frac + inc) & DECOMPOSED_OVERFLOW_BIT); @@ -3579,11 +3578,9 @@ static float32 roundAndPackFloat32(bool zSign, int zExp, uint32_t zSig, float_raise(float_flag_output_denormal, status); return packFloat32(zSign, 0, 0); } - isTiny = - (status->float_detect_tininess - == float_tininess_before_rounding) - || ( zExp < -1 ) - || ( zSig + roundIncrement < 0x80000000 ); + isTiny = status->tininess_before_rounding + || (zExp < -1) + || (zSig + roundIncrement < 0x80000000); shift32RightJamming( zSig, - zExp, &zSig ); zExp = 0; roundBits = zSig & 0x7F; @@ -3735,11 +3732,9 @@ static float64 roundAndPackFloat64(bool zSign, int zExp, uint64_t zSig, float_raise(float_flag_output_denormal, status); return packFloat64(zSign, 0, 0); } - isTiny = - (status->float_detect_tininess - == float_tininess_before_rounding) - || ( zExp < -1 ) - || ( zSig + roundIncrement < UINT64_C(0x8000000000000000) ); + isTiny = status->tininess_before_rounding + || (zExp < -1) + || (zSig + roundIncrement < UINT64_C(0x8000000000000000)); shift64RightJamming( zSig, - zExp, &zSig ); zExp = 0; roundBits = zSig & 0x3FF; @@ -3878,11 +3873,9 @@ floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign, float_raise(float_flag_output_denormal, status); return packFloatx80(zSign, 0, 0); } - isTiny = - (status->float_detect_tininess - == float_tininess_before_rounding) - || ( zExp < 0 ) - || ( zSig0 <= zSig0 + roundIncrement ); + isTiny = status->tininess_before_rounding + || (zExp < 0 ) + || (zSig0 <= zSig0 + roundIncrement); shift64RightJamming( zSig0, 1 - zExp, &zSig0 ); zExp = 0; roundBits = zSig0 & roundMask; @@ -3956,12 +3949,10 @@ floatx80 roundAndPackFloatx80(int8_t roundingPrecision, bool zSign, floatx80_infinity_low); } if ( zExp <= 0 ) { - isTiny = - (status->float_detect_tininess - == float_tininess_before_rounding) - || ( zExp < 0 ) - || ! increment - || ( zSig0 < UINT64_C(0xFFFFFFFFFFFFFFFF) ); + isTiny = status->tininess_before_rounding + || (zExp < 0) + || !increment + || (zSig0 < UINT64_C(0xFFFFFFFFFFFFFFFF)); shift64ExtraRightJamming( zSig0, zSig1, 1 - zExp, &zSig0, &zSig1 ); zExp = 0; if (isTiny && zSig1) { @@ -4237,17 +4228,12 @@ static float128 roundAndPackFloat128(bool zSign, int32_t zExp, float_raise(float_flag_output_denormal, status); return packFloat128(zSign, 0, 0, 0); } - isTiny = - (status->float_detect_tininess - == float_tininess_before_rounding) - || ( zExp < -1 ) - || ! increment - || lt128( - zSig0, - zSig1, - UINT64_C(0x0001FFFFFFFFFFFF), - UINT64_C(0xFFFFFFFFFFFFFFFF) - ); + isTiny = status->tininess_before_rounding + || (zExp < -1) + || !increment + || lt128(zSig0, zSig1, + UINT64_C(0x0001FFFFFFFFFFFF), + UINT64_C(0xFFFFFFFFFFFFFFFF)); shift128ExtraRightJamming( zSig0, zSig1, zSig2, - zExp, &zSig0, &zSig1, &zSig2 ); zExp = 0; |