1 files changed, 6 insertions, 0 deletions
diff --git a/intern/cycles/util/util_math.h b/intern/cycles/util/util_math.h
index dde0d31f467..7b0a967f8bb 100644
--- a/intern/cycles/util/util_math.h
+++ b/intern/cycles/util/util_math.h
@@ -318,6 +318,12 @@ ccl_device_inline int quick_floor_to_int(float x)
   return float_to_int(x) - ((x < 0) ? 1 : 0);
 }
 
+ccl_device_inline float floorfrac(float x, int *i)
+{
+  *i = quick_floor_to_int(x);
+  return x - *i;
+}
+
 ccl_device_inline int ceil_to_int(float f)
 {
   return float_to_int(ceilf(f));