diff options
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat.c | 82 |
1 files changed, 22 insertions, 60 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 770badd447..c32b1c7113 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -3862,6 +3862,28 @@ FloatRelation float128_compare_quiet(float128 a, float128 b, float_status *s) return float128_do_compare(a, b, s, true); } +static FloatRelation QEMU_FLATTEN +floatx80_do_compare(floatx80 a, floatx80 b, float_status *s, bool is_quiet) +{ + FloatParts128 pa, pb; + + if (!floatx80_unpack_canonical(&pa, a, s) || + !floatx80_unpack_canonical(&pb, b, s)) { + return float_relation_unordered; + } + return parts_compare(&pa, &pb, s, is_quiet); +} + +FloatRelation floatx80_compare(floatx80 a, floatx80 b, float_status *s) +{ + return floatx80_do_compare(a, b, s, false); +} + +FloatRelation floatx80_compare_quiet(floatx80 a, floatx80 b, float_status *s) +{ + return floatx80_do_compare(a, b, s, true); +} + /* * Scale by 2**N */ @@ -5696,66 +5718,6 @@ float128 float128_rem(float128 a, float128 b, float_status *status) return normalizeRoundAndPackFloat128(aSign ^ zSign, bExp - 4, aSig0, aSig1, status); } - -static inline FloatRelation -floatx80_compare_internal(floatx80 a, floatx80 b, bool is_quiet, - float_status *status) -{ - bool aSign, bSign; - - if (floatx80_invalid_encoding(a) || floatx80_invalid_encoding(b)) { - float_raise(float_flag_invalid, status); - return float_relation_unordered; - } - if (( ( extractFloatx80Exp( a ) == 0x7fff ) && - ( extractFloatx80Frac( a )<<1 ) ) || - ( ( extractFloatx80Exp( b ) == 0x7fff ) && - ( extractFloatx80Frac( b )<<1 ) )) { - if (!is_quiet || - floatx80_is_signaling_nan(a, status) || - floatx80_is_signaling_nan(b, status)) { - float_raise(float_flag_invalid, status); - } - return float_relation_unordered; - } - aSign = extractFloatx80Sign( a ); - bSign = extractFloatx80Sign( b ); - if ( aSign != bSign ) { - - if ( ( ( (uint16_t) ( ( a.high | b.high ) << 1 ) ) == 0) && - ( ( a.low | b.low ) == 0 ) ) { - /* zero case */ - return float_relation_equal; - } else { - return 1 - (2 * aSign); - } - } else { - /* Normalize pseudo-denormals before comparison. */ - if ((a.high & 0x7fff) == 0 && a.low & UINT64_C(0x8000000000000000)) { - ++a.high; - } - if ((b.high & 0x7fff) == 0 && b.low & UINT64_C(0x8000000000000000)) { - ++b.high; - } - if (a.low == b.low && a.high == b.high) { - return float_relation_equal; - } else { - return 1 - 2 * (aSign ^ ( lt128( a.high, a.low, b.high, b.low ) )); - } - } -} - -FloatRelation floatx80_compare(floatx80 a, floatx80 b, float_status *status) -{ - return floatx80_compare_internal(a, b, 0, status); -} - -FloatRelation floatx80_compare_quiet(floatx80 a, floatx80 b, - float_status *status) -{ - return floatx80_compare_internal(a, b, 1, status); -} - static void __attribute__((constructor)) softfloat_init(void) { union_float64 ua, ub, uc, ur; |