Cycles: use LIKELY/UNLIKELY macros

Gives overall ~3% speedup in own tests for BMW scene.

1 files changed, 5 insertions, 5 deletions

diff --git a/intern/cycles/util/util_math.h b/intern/cycles/util/util_math.h
index 53ed6817258..ded75762cd2 100644
--- a/intern/cycles/util/util_math.h
+++ b/intern/cycles/util/util_math.h
@@ -1237,7 +1237,7 @@ ccl_device float compatible_powf(float x, float y)
 
 ccl_device float safe_powf(float a, float b)
 {
-	if(a < 0.0f && b != float_to_int(b))
+	if(UNLIKELY(a < 0.0f && b != float_to_int(b)))
 		return 0.0f;
 
 	return compatible_powf(a, b);
@@ -1245,7 +1245,7 @@ ccl_device float safe_powf(float a, float b)
 
 ccl_device float safe_logf(float a, float b)
 {
-	if(a < 0.0f || b < 0.0f)
+	if(UNLIKELY(a < 0.0f || b < 0.0f))
 		return 0.0f;
 
 	return logf(a)/logf(b);
@@ -1305,7 +1305,7 @@ ccl_device bool ray_aligned_disk_intersect(
 	float3 disk_N = normalize_len(ray_P - disk_P, &disk_t);
 	float div = dot(ray_D, disk_N);
 
-	if(div == 0.0f)
+	if(UNLIKELY(div == 0.0f))
 		return false;
 
 	/* compute t to intersection point */
@@ -1335,7 +1335,7 @@ ccl_device bool ray_triangle_intersect(
 	float3 s1 = cross(ray_D, e2);
 
 	const float divisor = dot(s1, e1);
-	if(divisor == 0.0f)
+	if(UNLIKELY(divisor == 0.0f))
 		return false;
 
 	const float invdivisor = 1.0f/divisor;
@@ -1378,7 +1378,7 @@ ccl_device bool ray_triangle_intersect_uv(
 	float3 s1 = cross(ray_D, e2);
 
 	const float divisor = dot(s1, e1);
-	if(divisor == 0.0f)
+	if(UNLIKELY(divisor == 0.0f))
 		return false;
 
 	const float invdivisor = 1.0f/divisor;