From f6714d365da068481d83787b4044134ae2ec5dfd Mon Sep 17 00:00:00 2001 From: Aurelien Jarno Date: Wed, 20 Apr 2011 13:04:22 +0200 Subject: softfloat: add floatx80_compare*() functions Add floatx80_compare() and floatx80_compare_quiet() functions to match the softfloat-native ones. Reviewed-by: Peter Maydell Signed-off-by: Aurelien Jarno --- fpu/softfloat.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ fpu/softfloat.h | 2 ++ 2 files changed, 48 insertions(+) (limited to 'fpu') diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 6ce0b61..4368069 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -6190,6 +6190,52 @@ int float ## s ## _compare_quiet( float ## s a, float ## s b STATUS_PARAM ) \ COMPARE(32, 0xff) COMPARE(64, 0x7ff) +INLINE int floatx80_compare_internal( floatx80 a, floatx80 b, + int is_quiet STATUS_PARAM ) +{ + flag aSign, bSign; + + if (( ( extractFloatx80Exp( a ) == 0x7fff ) && + ( extractFloatx80Frac( a )<<1 ) ) || + ( ( extractFloatx80Exp( b ) == 0x7fff ) && + ( extractFloatx80Frac( b )<<1 ) )) { + if (!is_quiet || + floatx80_is_signaling_nan( a ) || + floatx80_is_signaling_nan( b ) ) { + float_raise( float_flag_invalid STATUS_VAR); + } + 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 { + 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 ) )); + } + } +} + +int floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM ) +{ + return floatx80_compare_internal(a, b, 0 STATUS_VAR); +} + +int floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM ) +{ + return floatx80_compare_internal(a, b, 1 STATUS_VAR); +} + INLINE int float128_compare_internal( float128 a, float128 b, int is_quiet STATUS_PARAM ) { diff --git a/fpu/softfloat.h b/fpu/softfloat.h index 7b3b88f..5eff085 100644 --- a/fpu/softfloat.h +++ b/fpu/softfloat.h @@ -550,6 +550,8 @@ int floatx80_eq_quiet( floatx80, floatx80 STATUS_PARAM ); int floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM ); int floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM ); int floatx80_unordered_quiet( floatx80, floatx80 STATUS_PARAM ); +int floatx80_compare( floatx80, floatx80 STATUS_PARAM ); +int floatx80_compare_quiet( floatx80, floatx80 STATUS_PARAM ); int floatx80_is_quiet_nan( floatx80 ); int floatx80_is_signaling_nan( floatx80 ); floatx80 floatx80_maybe_silence_nan( floatx80 ); -- cgit v1.1