diff options
| -rw-r--r-- | fpu/softfloat.c | 46 | ||||
| -rw-r--r-- | include/fpu/softfloat.h | 1 |
2 files changed, 47 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index d2e909593f..c2c1a5650b 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -1559,6 +1559,52 @@ int64 float32_to_int64( float32 a STATUS_PARAM ) /*---------------------------------------------------------------------------- | Returns the result of converting the single-precision floating-point value +| `a' to the 64-bit unsigned integer format. The conversion is +| performed according to the IEC/IEEE Standard for Binary Floating-Point +| Arithmetic---which means in particular that the conversion is rounded +| according to the current rounding mode. If `a' is a NaN, the largest +| unsigned integer is returned. Otherwise, if the conversion overflows, the +| largest unsigned integer is returned. If the 'a' is negative, the result +| is rounded and zero is returned; values that do not round to zero will +| raise the inexact exception flag. +*----------------------------------------------------------------------------*/ + +uint64 float32_to_uint64(float32 a STATUS_PARAM) +{ + flag aSign; + int_fast16_t aExp, shiftCount; + uint32_t aSig; + uint64_t aSig64, aSigExtra; + a = float32_squash_input_denormal(a STATUS_VAR); + + aSig = extractFloat32Frac(a); + aExp = extractFloat32Exp(a); + aSign = extractFloat32Sign(a); + if ((aSign) && (aExp > 126)) { + float_raise(float_flag_invalid STATUS_VAR); + if (float32_is_any_nan(a)) { + return LIT64(0xFFFFFFFFFFFFFFFF); + } else { + return 0; + } + } + shiftCount = 0xBE - aExp; + if (aExp) { + aSig |= 0x00800000; + } + if (shiftCount < 0) { + float_raise(float_flag_invalid STATUS_VAR); + return LIT64(0xFFFFFFFFFFFFFFFF); + } + + aSig64 = aSig; + aSig64 <<= 40; + shift64ExtraRightJamming(aSig64, 0, shiftCount, &aSig64, &aSigExtra); + return roundAndPackUint64(aSign, aSig64, aSigExtra STATUS_VAR); +} + +/*---------------------------------------------------------------------------- +| Returns the result of converting the single-precision floating-point value | `a' to the 64-bit two's complement integer format. The conversion is | performed according to the IEC/IEEE Standard for Binary Floating-Point | Arithmetic, except that the conversion is always rounded toward zero. If diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index 78b165670d..eb81c3b0cc 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -295,6 +295,7 @@ int32 float32_to_int32_round_to_zero( float32 STATUS_PARAM ); uint32 float32_to_uint32( float32 STATUS_PARAM ); uint32 float32_to_uint32_round_to_zero( float32 STATUS_PARAM ); int64 float32_to_int64( float32 STATUS_PARAM ); +uint64 float32_to_uint64(float32 STATUS_PARAM); int64 float32_to_int64_round_to_zero( float32 STATUS_PARAM ); float64 float32_to_float64( float32 STATUS_PARAM ); floatx80 float32_to_floatx80( float32 STATUS_PARAM ); |