diff options
| author | José Fonseca <jfonseca@vmware.com> | 2009-08-22 22:26:55 +0100 |
|---|---|---|
| committer | José Fonseca <jfonseca@vmware.com> | 2009-08-29 09:21:40 +0100 |
| commit | 5811ed87d732101ab8cfbd087bc99d8c6c963f30 (patch) | |
| tree | d0167369e347bd22ccb6be7d668d5fd878593d5d /src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c | |
| parent | 3f36f4b0519f7a568d6de9919de1001880ab5c8a (diff) | |
llvmpipe: Add a bunch of comments.
Description/rationale/to-do items, while I still remember them...
Diffstat (limited to 'src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c index 87ba456065..c11a9398f8 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_blend_aos.c @@ -28,7 +28,16 @@ /** * @file - * Blend LLVM IR generation -- AOS form. + * Blend LLVM IR generation -- AoS layout. + * + * AoS blending is in general much slower than SoA, but there are some cases + * where it might be faster. In particular, if a pixel is rendered only once + * then the overhead of tiling and untiling will dominate over the speedup that + * SoA gives. So we might want to detect such cases and fallback to AoS in the + * future, but for now this function is here for historical/benchmarking + * purposes. + * + * Run lp_blend_test after any change to this file. * * @author Jose Fonseca <jfonseca@vmware.com> */ |