diff options
| -rw-r--r-- | fpu/softfloat.c | 54 | ||||
| -rw-r--r-- | include/fpu/softfloat.h | 3 |
2 files changed, 56 insertions, 1 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 6c7a90a054..e0ea599769 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -111,6 +111,7 @@ static int32 roundAndPackInt32( flag zSign, uint64_t absZ STATUS_PARAM) roundNearestEven = ( roundingMode == float_round_nearest_even ); switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: roundIncrement = 0x40; break; case float_round_to_zero: @@ -161,6 +162,7 @@ static int64 roundAndPackInt64( flag zSign, uint64_t absZ0, uint64_t absZ1 STATU roundNearestEven = ( roundingMode == float_round_nearest_even ); switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: increment = ((int64_t) absZ1 < 0); break; case float_round_to_zero: @@ -214,6 +216,7 @@ static int64 roundAndPackUint64(flag zSign, uint64_t absZ0, roundNearestEven = (roundingMode == float_round_nearest_even); switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: increment = ((int64_t)absZ1 < 0); break; case float_round_to_zero: @@ -366,6 +369,7 @@ static float32 roundAndPackFloat32(flag zSign, int_fast16_t zExp, uint32_t zSig roundNearestEven = ( roundingMode == float_round_nearest_even ); switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: roundIncrement = 0x40; break; case float_round_to_zero: @@ -550,6 +554,7 @@ static float64 roundAndPackFloat64(flag zSign, int_fast16_t zExp, uint64_t zSig roundNearestEven = ( roundingMode == float_round_nearest_even ); switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: roundIncrement = 0x200; break; case float_round_to_zero: @@ -734,6 +739,7 @@ static floatx80 zSig0 |= ( zSig1 != 0 ); switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: break; case float_round_to_zero: roundIncrement = 0; @@ -794,6 +800,7 @@ static floatx80 precision80: switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: increment = ((int64_t)zSig1 < 0); break; case float_round_to_zero: @@ -838,6 +845,7 @@ static floatx80 if ( zSig1 ) STATUS(float_exception_flags) |= float_flag_inexact; switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: increment = ((int64_t)zSig1 < 0); break; case float_round_to_zero: @@ -1052,6 +1060,7 @@ static float128 roundNearestEven = ( roundingMode == float_round_nearest_even ); switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: increment = ((int64_t)zSig2 < 0); break; case float_round_to_zero: @@ -1114,6 +1123,7 @@ static float128 if ( isTiny && zSig2 ) float_raise( float_flag_underflow STATUS_VAR); switch (roundingMode) { case float_round_nearest_even: + case float_round_ties_away: increment = ((int64_t)zSig2 < 0); break; case float_round_to_zero: @@ -1785,6 +1795,11 @@ float32 float32_round_to_int( float32 a STATUS_PARAM) return packFloat32( aSign, 0x7F, 0 ); } break; + case float_round_ties_away: + if (aExp == 0x7E) { + return packFloat32(aSign, 0x7F, 0); + } + break; case float_round_down: return make_float32(aSign ? 0xBF800000 : 0); case float_round_up: @@ -1803,6 +1818,9 @@ float32 float32_round_to_int( float32 a STATUS_PARAM) z &= ~lastBitMask; } break; + case float_round_ties_away: + z += lastBitMask >> 1; + break; case float_round_to_zero: break; case float_round_up: @@ -3183,6 +3201,9 @@ static float32 roundAndPackFloat16(flag zSign, int_fast16_t zExp, increment = zSig & (increment << 1); } break; + case float_round_ties_away: + increment = (mask + 1) >> 1; + break; case float_round_up: increment = zSign ? 0 : mask; break; @@ -3487,6 +3508,11 @@ float64 float64_round_to_int( float64 a STATUS_PARAM ) return packFloat64( aSign, 0x3FF, 0 ); } break; + case float_round_ties_away: + if (aExp == 0x3FE) { + return packFloat64(aSign, 0x3ff, 0); + } + break; case float_round_down: return make_float64(aSign ? LIT64( 0xBFF0000000000000 ) : 0); case float_round_up: @@ -3506,6 +3532,9 @@ float64 float64_round_to_int( float64 a STATUS_PARAM ) z &= ~lastBitMask; } break; + case float_round_ties_away: + z += lastBitMask >> 1; + break; case float_round_to_zero: break; case float_round_up: @@ -4771,6 +4800,11 @@ floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM ) packFloatx80( aSign, 0x3FFF, LIT64( 0x8000000000000000 ) ); } break; + case float_round_ties_away: + if (aExp == 0x3FFE) { + return packFloatx80(aSign, 0x3FFF, LIT64(0x8000000000000000)); + } + break; case float_round_down: return aSign ? @@ -4794,6 +4828,9 @@ floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM ) z.low &= ~lastBitMask; } break; + case float_round_ties_away: + z.low += lastBitMask >> 1; + break; case float_round_to_zero: break; case float_round_up: @@ -5862,6 +5899,15 @@ float128 float128_round_to_int( float128 a STATUS_PARAM ) } } break; + case float_round_ties_away: + if (lastBitMask) { + add128(z.high, z.low, 0, lastBitMask >> 1, &z.high, &z.low); + } else { + if ((int64_t) z.low < 0) { + ++z.high; + } + } + break; case float_round_to_zero: break; case float_round_up: @@ -5893,6 +5939,11 @@ float128 float128_round_to_int( float128 a STATUS_PARAM ) return packFloat128( aSign, 0x3FFF, 0, 0 ); } break; + case float_round_ties_away: + if (aExp == 0x3FFE) { + return packFloat128(aSign, 0x3FFF, 0, 0); + } + break; case float_round_down: return aSign ? packFloat128( 1, 0x3FFF, 0, 0 ) @@ -5916,6 +5967,9 @@ float128 float128_round_to_int( float128 a STATUS_PARAM ) z.high &= ~ lastBitMask; } break; + case float_round_ties_away: + z.high += lastBitMask>>1; + break; case float_round_to_zero: break; case float_round_up: diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index 83d324aca8..806ae13780 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -152,7 +152,8 @@ enum { float_round_nearest_even = 0, float_round_down = 1, float_round_up = 2, - float_round_to_zero = 3 + float_round_to_zero = 3, + float_round_ties_away = 4, }; /*---------------------------------------------------------------------------- |