67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
/// @ref core
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/// @file glm/detail/func_integer_simd.inl
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#include "../simd/integer.h"
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#if GLM_ARCH & GLM_ARCH_SSE2_BIT
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namespace glm{
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namespace detail
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{
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template <glm::precision P>
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struct compute_bitfieldReverseStep<uint32, P, tvec4, true, true>
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{
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GLM_FUNC_QUALIFIER static tvec4<uint32, P> call(tvec4<uint32, P> const & v, uint32 Mask, uint32 Shift)
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{
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__m128i const set0 = v.data;
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__m128i const set1 = _mm_set1_epi32(Mask);
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__m128i const and1 = _mm_and_si128(set0, set1);
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__m128i const sft1 = _mm_slli_epi32(and1, Shift);
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__m128i const set2 = _mm_andnot_si128(set0, _mm_set1_epi32(-1));
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__m128i const and2 = _mm_and_si128(set0, set2);
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__m128i const sft2 = _mm_srai_epi32(and2, Shift);
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__m128i const or0 = _mm_or_si128(sft1, sft2);
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return or0;
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}
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};
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template <glm::precision P>
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struct compute_bitfieldBitCountStep<uint32, P, tvec4, true, true>
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{
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GLM_FUNC_QUALIFIER static tvec4<uint32, P> call(tvec4<uint32, P> const & v, uint32 Mask, uint32 Shift)
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{
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__m128i const set0 = v.data;
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__m128i const set1 = _mm_set1_epi32(Mask);
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__m128i const and0 = _mm_and_si128(set0, set1);
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__m128i const sft0 = _mm_slli_epi32(set0, Shift);
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__m128i const and1 = _mm_and_si128(sft0, set1);
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__m128i const add0 = _mm_add_epi32(and0, and1);
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return add0;
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}
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};
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}//namespace detail
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# if GLM_ARCH & GLM_ARCH_AVX_BIT
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template <>
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GLM_FUNC_QUALIFIER int bitCount(uint32 x)
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{
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return _mm_popcnt_u32(x);
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}
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template <>
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GLM_FUNC_QUALIFIER int bitCount(uint64 x)
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{
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return static_cast<int>(_mm_popcnt_u64(x));
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}
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# endif
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}//namespace glm
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#endif//GLM_ARCH & GLM_ARCH_SSE2_BIT
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