diff options
| -rw-r--r-- | src/compiler/glsl/float64.glsl | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl index ac6d6221a64..e8f6acc3c30 100644 --- a/src/compiler/glsl/float64.glsl +++ b/src/compiler/glsl/float64.glsl @@ -905,6 +905,24 @@ __uint64_to_fp64(uint64_t a) } } +uint64_t +__int64_to_fp64(int64_t a) +{ + if (a==0) + return 0ul; + + uint64_t absA = mix(uint64_t(a), uint64_t(-a), a < 0); + uint aFracHi = __extractFloat64FracHi(absA); + uvec2 aFrac = unpackUint2x32(absA); + uint zSign = uint(a < 0); + + if ((aFracHi & 0x80000000u) != 0u) { + return mix(0ul, __packFloat64(1, 0x434, 0u, 0u), a < 0); + } + + return __normalizeRoundAndPackFloat64(zSign, 0x432, aFrac.y, aFrac.x); +} + /* Returns the result of converting the double-precision floating-point value * `a' to the 32-bit two's complement integer format. The conversion is * performed according to the IEEE Standard for Floating-Point Arithmetic--- |