[ t ] [ 0/0. 1.0 unordered? ] unit-test
[ f ] [ 1.0 1.0 unordered? ] unit-test
+[ t ] [ -0.0 fp-sign ] unit-test
+[ t ] [ -1.0 fp-sign ] unit-test
+[ f ] [ 0.0 fp-sign ] unit-test
+[ f ] [ 1.0 fp-sign ] unit-test
+
+[ t ] [ -0.0 abs 0.0 fp-bitwise= ] unit-test
+[ 1.5 ] [ -1.5 abs ] unit-test
+[ 1.5 ] [ 1.5 abs ] unit-test
M: float fp-infinity?
dup fp-special? [ fp-nan-payload zero? ] [ drop f ] if ; inline
-M: float next-float ( m -- n )
+M: float next-float
double>bits
dup -0.0 double>bits > [ 1 - bits>double ] [ ! negative non-zero
dup -0.0 double>bits = [ drop 0.0 ] [ ! negative zero
M: float unordered? [ fp-nan? ] bi@ or ; inline
-M: float prev-float ( m -- n )
+M: float prev-float
double>bits
dup -0.0 double>bits >= [ 1 + bits>double ] [ ! negative
dup 0.0 double>bits = [ drop -0.0 ] [ ! positive zero
1 - bits>double ! positive non-zero
] if
] if ; inline
+
+M: float fp-sign double>bits 63 bit? ; inline
+
+M: float abs double>bits 63 2^ bitnot bitand bits>double ; inline
GENERIC: fp-snan? ( x -- ? )
GENERIC: fp-infinity? ( x -- ? )
GENERIC: fp-nan-payload ( x -- bits )
+GENERIC: fp-sign ( x -- ? )
M: object fp-special? drop f ; inline
M: object fp-nan? drop f ; inline
M: object fp-qnan? drop f ; inline
M: object fp-snan? drop f ; inline
M: object fp-infinity? drop f ; inline
-M: object fp-nan-payload drop f ; inline
: <fp-nan> ( payload -- nan )
HEX: 7ff0000000000000 bitor bits>double ; inline