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, uint, Q, true, true>
    {
        GLM_FUNC_QUALIFIER static vec<4, uint, Q> call(vec<4, uint, Q> const& v, uint Mask, uint 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, uint, Q, true, true>
    {
        GLM_FUNC_QUALIFIER static vec<4, uint, Q> call(vec<4, uint, Q> const& v, uint Mask, uint 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(uint x)
    {
        return _mm_popcnt_u32(x);
    }
 
#   if(GLM_MODEL == GLM_MODEL_64)
    template<>
    GLM_FUNC_QUALIFIER int bitCount(detail::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