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

Reviewed-by: Elie Tournier <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/compiler/glsl/float64.glsl b/src/compiler/glsl/float64.glsl
index c54835fbf78..7d12da50ac0 100644
--- 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)));
+}