glsl: Add "built-in" functions to do ffract(fp64)

Reviewed-by: Elie Tournier <tournier.elie@gmail.com>

diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
index c54835fbf78e4b7d8b1df50c050887ac672886a1..7d12da50ac0162ab13e7c2a541c04d8f5d4848c8 100644 (file)
--- a/src/compiler/glsl/float64.glsl
+++ b/src/compiler/glsl/float64.glsl
@@ -1458,3 +1458,9 @@ __fmax64(uint64_t a, uint64_t b)
    if (__flt64_nonnan(a, b)) return b;
    return a;
 }
+
+uint64_t
+__ffract64(uint64_t a)
+{
+   return __fadd64(a, __fneg64(__ffloor64(a)));
+}