From 8ef19e766417c4add043de681728506e0a881335 Mon Sep 17 00:00:00 2001
From: "marina.kolpakova" <marina.kolpakova@itseez.com>
Date: Wed, 28 Nov 2012 19:47:51 +0400
Subject: [PATCH] hack luv

---
 modules/gpu/src/cuda/icf-sc.cu | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/modules/gpu/src/cuda/icf-sc.cu b/modules/gpu/src/cuda/icf-sc.cu
index 812be7a0e4..1b9c02eb2b 100644
--- a/modules/gpu/src/cuda/icf-sc.cu
+++ b/modules/gpu/src/cuda/icf-sc.cu
@@ -65,7 +65,8 @@ namespace icf {
         const float _u = __fdividef(4.f * x, divisor);
         const float _v = __fdividef(9.f * y, divisor);
 
-        const float L = fmax(0.f, ((116.f * cbrtf(y)) - 16.f));
+        float hack = static_cast<float>(__float2int_rn(y * 2047)) / 2047;
+        const float L = fmax(0.f, ((116.f * cbrtf(hack)) - 16.f));
         const float U = 13.f * L * (_u - _ur);
         const float V = 13.f * L * (_v - _vr);