diff options
| -rw-r--r-- | src/gallium/include/pipe/p_state.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h index 1543e90972e..5526c392aa7 100644 --- a/src/gallium/include/pipe/p_state.h +++ b/src/gallium/include/pipe/p_state.h @@ -326,7 +326,17 @@ struct pipe_blend_state struct pipe_blend_color { - float color[4]; + /** + * Making the color array explicitly 16-byte aligned provides a hint to + * compilers to make more efficient auto-vectorization optimizations. + * The actual performance gains from vectorizing the blend color array are + * fairly minimal, if any, but the alignment is necessary to work around + * buggy vectorization in some compilers which fail to generate the correct + * unaligned accessors resulting in a segfault. Specifically several + * versions of the Intel compiler are known to be affected but it's likely + * others are as well. + */ + PIPE_ALIGN_VAR(16) float color[4]; }; |