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swr/rast: Cull prims when all verts have negative clip distances 

Performance optimization, and fixes some clipping issues.

Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com>
This commit is contained in:
George Kyriazis 2018-02-01 17:43:04 -06:00
parent cb4b604ebd
commit 3e560b7c85
1 changed files with 4 additions and 0 deletions
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4
src/gallium/drivers/swr/rasterizer/core/clip.h
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@ -417,6 +417,7 @@ public:
uint32_t slot = index >> 2;
uint32_t component = index & 0x3;
typename SIMD_T::Float vCullMaskElem = SIMD_T::set1_ps(-1.0f);
for (uint32_t e = 0; e < NumVertsPerPrim; ++e)
{
typename SIMD_T::Float vClipComp;
@ -430,8 +431,11 @@ public:
}
typename SIMD_T::Float vClip = SIMD_T::template cmp_ps<SIMD_T::CompareType::UNORD_Q>(vClipComp, vClipComp);
typename SIMD_T::Float vCull = SIMD_T::template cmp_ps<SIMD_T::CompareType::NLE_UQ>(SIMD_T::setzero_ps(), vClipComp);
vCullMaskElem = SIMD_T::and_ps(vCullMaskElem, vCull);
vClipCullMask = SIMD_T::or_ps(vClipCullMask, vClip);
}
vClipCullMask = SIMD_T::or_ps(vClipCullMask, vCullMaskElem);
}
return SIMD_T::movemask_ps(vClipCullMask);