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llvmpipe: slightly simplify build_mask

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This commit is contained in:
Keith Whitwell 2010-08-24 23:05:57 +01:00
parent 0aa3a09ced
commit e38d2f7163
1 changed files with 2 additions and 6 deletions
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8
src/gallium/drivers/llvmpipe/lp_rast_tri.c
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@ -229,13 +229,9 @@ build_mask(int c, int dcdx, int dcdy)
*/
__m128i cstep0 = _mm_add_epi32(c0, step);
/* Scale up step for moving between quads. This should probably
* be an arithmetic shift left, but there doesn't seem to be
* such a thing in SSE. It's unlikely that the step value is
* going to be large enough to overflow across 4 pixels, though
* if it is that big, rendering will be incorrect anyway.
/* Scale up step for moving between quads.
*/
__m128i step4 = _mm_slli_epi32(step, 1);
__m128i step4 = _mm_add_epi32(step, step);
/* Get values for the remaining quads:
*/