diff options
| -rw-r--r-- | src/compiler/glsl/float64.glsl | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl index 5f2804a8a34..a2642e9b34e 100644 --- a/src/compiler/glsl/float64.glsl +++ b/src/compiler/glsl/float64.glsl @@ -166,3 +166,53 @@ __extractFloat64Sign(uint64_t a) { return unpackUint2x32(a).y >> 31; } + +/* Returns true if the 64-bit value formed by concatenating `a0' and `a1' is less + * than the 64-bit value formed by concatenating `b0' and `b1'. Otherwise, + * returns false. + */ +bool +lt64(uint a0, uint a1, uint b0, uint b1) +{ + return (a0 < b0) || ((a0 == b0) && (a1 < b1)); +} + +bool +__flt64_nonnan(uint64_t __a, uint64_t __b) +{ + uvec2 a = unpackUint2x32(__a); + uvec2 b = unpackUint2x32(__b); + uint aSign = __extractFloat64Sign(__a); + uint bSign = __extractFloat64Sign(__b); + if (aSign != bSign) + return (aSign != 0u) && ((((a.y | b.y)<<1) | a.x | b.x) != 0u); + + return mix(lt64(a.y, a.x, b.y, b.x), lt64(b.y, b.x, a.y, a.x), aSign != 0u); +} + +/* Returns true if the double-precision floating-point value `a' is less than + * the corresponding value `b', and false otherwise. The comparison is performed + * according to the IEEE Standard for Floating-Point Arithmetic. + */ +bool +__flt64(uint64_t a, uint64_t b) +{ + if (__is_nan(a) || __is_nan(b)) + return false; + + return __flt64_nonnan(a, b); +} + +/* Returns true if the double-precision floating-point value `a' is greater + * than or equal to * the corresponding value `b', and false otherwise. The + * comparison is performed * according to the IEEE Standard for Floating-Point + * Arithmetic. + */ +bool +__fge64(uint64_t a, uint64_t b) +{ + if (__is_nan(a) || __is_nan(b)) + return false; + + return !__flt64_nonnan(a, b); +} |