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/// @ref core
/// @file glm/detail/func_integer_simd.inl
#include "../simd/integer.h"
#if GLM_ARCH & GLM_ARCH_SSE2_BIT
namespace glm{
namespace detail
{
template<qualifier Q>
struct compute_bitfieldReverseStep<4, uint32, Q, true, true>
{
GLM_FUNC_QUALIFIER static vec<4, uint32, Q> call(vec<4, uint32, Q> const& v, uint32 Mask, uint32 Shift)
{
__m128i const set0 = v.data;
__m128i const set1 = _mm_set1_epi32(static_cast<int>(Mask));
__m128i const and1 = _mm_and_si128(set0, set1);
__m128i const sft1 = _mm_slli_epi32(and1, Shift);
__m128i const set2 = _mm_andnot_si128(set0, _mm_set1_epi32(-1));
__m128i const and2 = _mm_and_si128(set0, set2);
__m128i const sft2 = _mm_srai_epi32(and2, Shift);
__m128i const or0 = _mm_or_si128(sft1, sft2);
return or0;
}
};
template<qualifier Q>
struct compute_bitfieldBitCountStep<4, uint32, Q, true, true>
{
GLM_FUNC_QUALIFIER static vec<4, uint32, Q> call(vec<4, uint32, Q> const& v, uint32 Mask, uint32 Shift)
{
__m128i const set0 = v.data;
__m128i const set1 = _mm_set1_epi32(static_cast<int>(Mask));
__m128i const and0 = _mm_and_si128(set0, set1);
__m128i const sft0 = _mm_slli_epi32(set0, Shift);
__m128i const and1 = _mm_and_si128(sft0, set1);
__m128i const add0 = _mm_add_epi32(and0, and1);
return add0;
}
};
}//namespace detail
# if GLM_ARCH & GLM_ARCH_AVX_BIT
template<>
GLM_FUNC_QUALIFIER int bitCount(uint32 x)
{
return _mm_popcnt_u32(x);
}
# if(GLM_MODEL == GLM_MODEL_64)
template<>
GLM_FUNC_QUALIFIER int bitCount(uint64 x)
{
return static_cast<int>(_mm_popcnt_u64(x));
}
# endif//GLM_MODEL
# endif//GLM_ARCH
}//namespace glm
#endif//GLM_ARCH & GLM_ARCH_SSE2_BIT
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