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    #[cfg(target_arch="x86")]
    use std::arch::x86::*;
    #[cfg(target_arch="x86_64")]
    use std::arch::x86_64::*;

    #[macro_use]
    mod macros;

    pub(crate) struct FusedMulAdd;
    pub(crate) struct AvxMulAdd;

    pub(crate) trait SMultiplyAdd {
        const IS_FUSED: bool;
        unsafe fn multiply_add(__m256, __m256, __m256) -> __m256;
    }

    impl SMultiplyAdd for AvxMulAdd {
        const IS_FUSED: bool = false;
        #[inline(always)]
        unsafe fn multiply_add(a: __m256, b: __m256, c: __m256) -> __m256 {
            _mm256_add_ps(_mm256_mul_ps(a, b), c)
        }
    }

    impl SMultiplyAdd for FusedMulAdd {
        const IS_FUSED: bool = true;
        #[inline(always)]
        unsafe fn multiply_add(a: __m256, b: __m256, c: __m256) -> __m256 {
            _mm256_fmadd_ps(a, b, c)
        }
    }

    pub(crate) trait DMultiplyAdd {
        const IS_FUSED: bool;
        unsafe fn multiply_add(__m256d, __m256d, __m256d) -> __m256d;
    }

    impl DMultiplyAdd for AvxMulAdd {
        const IS_FUSED: bool = false;
        #[inline(always)]
        unsafe fn multiply_add(a: __m256d, b: __m256d, c: __m256d) -> __m256d {
            _mm256_add_pd(_mm256_mul_pd(a, b), c)
        }
    }

    impl DMultiplyAdd for FusedMulAdd {
        const IS_FUSED: bool = true;
        #[inline(always)]
        unsafe fn multiply_add(a: __m256d, b: __m256d, c: __m256d) -> __m256d {
            _mm256_fmadd_pd(a, b, c)
        }
    }

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