swr/rast: Faster emulated simd16 permute
Speed up simd16 frontend (default) on avx/avx2 platforms; fixes performance regression caused by switch to simdlib. Reviewed-by: Bruce Cherniak <bruce.cherniak@intel.com> Cc: mesa-stable@lists.freedesktop.org
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@ -521,36 +521,24 @@ SIMD_IWRAPPER_2(packus_epi32); // See documentation for _mm256_packus_epi32
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static SIMDINLINE Integer SIMDCALL permute_epi32(Integer const &a, Integer const &swiz) // return a[swiz[i]] for each 32-bit lane i (int32)
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{
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Integer result;
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// Ugly slow implementation
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uint32_t const *pA = reinterpret_cast<uint32_t const*>(&a);
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uint32_t const *pSwiz = reinterpret_cast<uint32_t const*>(&swiz);
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uint32_t *pResult = reinterpret_cast<uint32_t *>(&result);
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for (uint32_t i = 0; i < SIMD_WIDTH; ++i)
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{
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pResult[i] = pA[0xF & pSwiz[i]];
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}
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return result;
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return castps_si(permute_ps(castsi_ps(a), swiz));
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}
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static SIMDINLINE Float SIMDCALL permute_ps(Float const &a, Integer const &swiz) // return a[swiz[i]] for each 32-bit lane i (float)
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{
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Float result;
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const auto mask = SIMD256T::set1_epi32(7);
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// Ugly slow implementation
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float const *pA = reinterpret_cast<float const*>(&a);
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uint32_t const *pSwiz = reinterpret_cast<uint32_t const*>(&swiz);
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float *pResult = reinterpret_cast<float *>(&result);
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auto lolo = SIMD256T::permute_ps(a.v8[0], SIMD256T::and_si(swiz.v8[0], mask));
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auto lohi = SIMD256T::permute_ps(a.v8[1], SIMD256T::and_si(swiz.v8[0], mask));
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for (uint32_t i = 0; i < SIMD_WIDTH; ++i)
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auto hilo = SIMD256T::permute_ps(a.v8[0], SIMD256T::and_si(swiz.v8[1], mask));
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auto hihi = SIMD256T::permute_ps(a.v8[1], SIMD256T::and_si(swiz.v8[1], mask));
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return Float
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{
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pResult[i] = pA[0xF & pSwiz[i]];
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}
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return result;
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SIMD256T::blendv_ps(lolo, lohi, SIMD256T::castsi_ps(SIMD256T::cmpgt_epi32(swiz.v8[0], mask))),
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SIMD256T::blendv_ps(hilo, hihi, SIMD256T::castsi_ps(SIMD256T::cmpgt_epi32(swiz.v8[1], mask))),
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};
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}
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// All of the 512-bit permute2f128_XX intrinsics do the following:
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