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Cycles: Minor optimization (~1%) for texture access on CPU

This commit is contained in:
Sv. Lockal 2014-01-06 22:05:31 +04:00
parent 4817da0df4
commit acc90b40bf
Notes: blender-bot 2023-02-14 11:24:04 +01:00 
Referenced by issue #38034, Cycles optimization: move srgb/alpha conversion out of cycles kernel
1 changed files with 11 additions and 1 deletions
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12
intern/cycles/kernel/svm/svm_image.h
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@ -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