Commit: acc90b40bff5a15604c4d98692ff3ba32fe44603
Author: Sv. Lockal
Date: Mon Jan 6 22:05:31 2014 +0400
https://developer.blender.org/rBacc90b40bff5a15604c4d98692ff3ba32fe44603
Cycles: Minor optimization (~1%) for texture access on CPU
===================================================================
M intern/cycles/kernel/svm/svm_image.h
===================================================================
diff --git a/intern/cycles/kernel/svm/svm_image.h
b/intern/cycles/kernel/svm/svm_image.h
index 45a2a8b..06228cd 100644
--- a/intern/cycles/kernel/svm/svm_image.h
+++ b/intern/cycles/kernel/svm/svm_image.h
@@ -116,6 +116,9 @@ ccl_device float4 svm_image_texture(KernelGlobals *kg, int
id, float x, float y,
#ifdef __KERNEL_CPU__
r = kernel_tex_image_interp(id, x, y);
+#ifdef __KERNEL_SSE2__
+ __m128 *rv = (__m128 *)&r;
+#endif
#else
/* not particularly proud of this massive switch, what are the
* alternatives?
@@ -234,6 +237,13 @@ ccl_device float4 svm_image_texture(KernelGlobals *kg, int
id, float x, float y,
#endif
if(use_alpha && r.w != 1.0f && r.w != 0.0f) {
+#ifdef __KERNEL_SSE2__
+ float alpha = r.w;
+ *rv = _mm_div_ps(*rv, _mm_set1_ps(alpha));
+ if(id >= TEX_NUM_FLOAT_IMAGES)
+ *rv = _mm_min_ps(*rv, _mm_set1_ps(1.0f));
+ r.w = alpha;
+#else
float invw = 1.0f/r.w;
r.x *= invw;
r.y *= invw;
@@ -244,12 +254,12 @@ ccl_device float4 svm_image_texture(KernelGlobals *kg,
int id, float x, float y,
r.y = min(r.y, 1.0f);
r.z = min(r.z, 1.0f);
}
+#endif
}
if(srgb) {
#ifdef __KERNEL_SSE2__
float alpha = r.w;
- __m128 *rv = (__m128 *)&r;
*rv = color_srgb_to_scene_linear(*rv);
r.w = alpha;
#else
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