diff options
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat.c | 112 |
1 files changed, 49 insertions, 63 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 2ba36ec370..53855892b9 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -415,24 +415,6 @@ float64_gen2(float64 xa, float64 xb, float_status *s, } /*---------------------------------------------------------------------------- -| Returns the fraction bits of the half-precision floating-point value `a'. -*----------------------------------------------------------------------------*/ - -static inline uint32_t extractFloat16Frac(float16 a) -{ - return float16_val(a) & 0x3ff; -} - -/*---------------------------------------------------------------------------- -| Returns the exponent bits of the half-precision floating-point value `a'. -*----------------------------------------------------------------------------*/ - -static inline int extractFloat16Exp(float16 a) -{ - return (float16_val(a) >> 10) & 0x1f; -} - -/*---------------------------------------------------------------------------- | Returns the fraction bits of the single-precision floating-point value `a'. *----------------------------------------------------------------------------*/ @@ -3306,6 +3288,55 @@ float64 float64_silence_nan(float64 a, float_status *status) return float64_pack_raw(p); } + +/*---------------------------------------------------------------------------- +| If `a' is denormal and we are in flush-to-zero mode then set the +| input-denormal exception and return zero. Otherwise just return the value. +*----------------------------------------------------------------------------*/ + +static bool parts_squash_denormal(FloatParts p, float_status *status) +{ + if (p.exp == 0 && p.frac != 0) { + float_raise(float_flag_input_denormal, status); + return true; + } + + return false; +} + +float16 float16_squash_input_denormal(float16 a, float_status *status) +{ + if (status->flush_inputs_to_zero) { + FloatParts p = float16_unpack_raw(a); + if (parts_squash_denormal(p, status)) { + return float16_set_sign(float16_zero, p.sign); + } + } + return a; +} + +float32 float32_squash_input_denormal(float32 a, float_status *status) +{ + if (status->flush_inputs_to_zero) { + FloatParts p = float32_unpack_raw(a); + if (parts_squash_denormal(p, status)) { + return float32_set_sign(float32_zero, p.sign); + } + } + return a; +} + +float64 float64_squash_input_denormal(float64 a, float_status *status) +{ + if (status->flush_inputs_to_zero) { + FloatParts p = float64_unpack_raw(a); + if (parts_squash_denormal(p, status)) { + return float64_set_sign(float64_zero, p.sign); + } + } + return a; +} + /*---------------------------------------------------------------------------- | Takes a 64-bit fixed-point value `absZ' with binary point between bits 6 | and 7, and returns the properly rounded 32-bit integer corresponding to the @@ -3483,21 +3514,6 @@ static int64_t roundAndPackUint64(flag zSign, uint64_t absZ0, } /*---------------------------------------------------------------------------- -| If `a' is denormal and we are in flush-to-zero mode then set the -| input-denormal exception and return zero. Otherwise just return the value. -*----------------------------------------------------------------------------*/ -float32 float32_squash_input_denormal(float32 a, float_status *status) -{ - if (status->flush_inputs_to_zero) { - if (extractFloat32Exp(a) == 0 && extractFloat32Frac(a) != 0) { - float_raise(float_flag_input_denormal, status); - return make_float32(float32_val(a) & 0x80000000); - } - } - return a; -} - -/*---------------------------------------------------------------------------- | Normalizes the subnormal single-precision floating-point value represented | by the denormalized significand `aSig'. The normalized exponent and | significand are stored at the locations pointed to by `zExpPtr' and @@ -3636,21 +3652,6 @@ static float32 } /*---------------------------------------------------------------------------- -| If `a' is denormal and we are in flush-to-zero mode then set the -| input-denormal exception and return zero. Otherwise just return the value. -*----------------------------------------------------------------------------*/ -float64 float64_squash_input_denormal(float64 a, float_status *status) -{ - if (status->flush_inputs_to_zero) { - if (extractFloat64Exp(a) == 0 && extractFloat64Frac(a) != 0) { - float_raise(float_flag_input_denormal, status); - return make_float64(float64_val(a) & (1ULL << 63)); - } - } - return a; -} - -/*---------------------------------------------------------------------------- | Normalizes the subnormal double-precision floating-point value represented | by the denormalized significand `aSig'. The normalized exponent and | significand are stored at the locations pointed to by `zExpPtr' and @@ -4982,21 +4983,6 @@ int float32_unordered_quiet(float32 a, float32 b, float_status *status) } /*---------------------------------------------------------------------------- -| If `a' is denormal and we are in flush-to-zero mode then set the -| input-denormal exception and return zero. Otherwise just return the value. -*----------------------------------------------------------------------------*/ -float16 float16_squash_input_denormal(float16 a, float_status *status) -{ - if (status->flush_inputs_to_zero) { - if (extractFloat16Exp(a) == 0 && extractFloat16Frac(a) != 0) { - float_raise(float_flag_input_denormal, status); - return make_float16(float16_val(a) & 0x8000); - } - } - return a; -} - -/*---------------------------------------------------------------------------- | Returns the result of converting the double-precision floating-point value | `a' to the extended double-precision floating-point format. The conversion | is performed according to the IEC/IEEE Standard for Binary Floating-Point |