From: George Kyriazis Date: Fri, 2 Feb 2018 01:28:58 +0000 (-0600) Subject: swr/rast: More precise user clip distance interpolation X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8a64593bde;p=mesa.git swr/rast: More precise user clip distance interpolation Reviewed-by: Bruce Cherniak --- diff --git a/src/gallium/drivers/swr/rasterizer/core/backend_impl.h b/src/gallium/drivers/swr/rasterizer/core/backend_impl.h index 2cfd52e829d..454f473b47e 100644 --- a/src/gallium/drivers/swr/rasterizer/core/backend_impl.h +++ b/src/gallium/drivers/swr/rasterizer/core/backend_impl.h @@ -62,8 +62,10 @@ static INLINE simdmask ComputeUserClipMask(uint8_t clipMask, float* pUserClipBuf simdscalar vB = _simd_broadcast_ss(pUserClipBuffer++); simdscalar vC = _simd_broadcast_ss(pUserClipBuffer++); + simdscalar vK = _simd_sub_ps(_simd_sub_ps(_simd_set1_ps(1.0f), vI), vJ); + // interpolate - simdscalar vInterp = vplaneps(vA, vB, vC, vI, vJ); + simdscalar vInterp = vplaneps(vA, vB, _simd_mul_ps(vK, vC), vI, vJ); // clip if interpolated clip distance is < 0 || NAN simdscalar vCull = _simd_cmp_ps(_simd_setzero_ps(), vInterp, _CMP_NLE_UQ); diff --git a/src/gallium/drivers/swr/rasterizer/core/binner.cpp b/src/gallium/drivers/swr/rasterizer/core/binner.cpp index 4510b13969c..8447bc4dc29 100644 --- a/src/gallium/drivers/swr/rasterizer/core/binner.cpp +++ b/src/gallium/drivers/swr/rasterizer/core/binner.cpp @@ -256,27 +256,12 @@ void ProcessUserClipDist(const SWR_BACKEND_STATE& state, PA_STATE& pa, uint32_t simd4scalar primClipDist[3]; pa.AssembleSingle(clipAttribSlot, primIndex, primClipDist); - float vertClipDist[NumVerts]; for (uint32_t e = 0; e < NumVerts; ++e) { OSALIGNSIMD(float) aVertClipDist[4]; SIMD128::store_ps(aVertClipDist, primClipDist[e]); - vertClipDist[e] = aVertClipDist[clipComp]; + *(pUserClipBuffer++) = aVertClipDist[clipComp]; }; - - // setup plane equations for barycentric interpolation in the backend - float baryCoeff[NumVerts]; - float last = vertClipDist[NumVerts - 1] * pRecipW[NumVerts - 1]; - for (uint32_t e = 0; e < NumVerts - 1; ++e) - { - baryCoeff[e] = vertClipDist[e] * pRecipW[e] - last; - } - baryCoeff[NumVerts - 1] = last; - - for (uint32_t e = 0; e < NumVerts; ++e) - { - *(pUserClipBuffer++) = baryCoeff[e]; - } } }