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    //! Vector fused multiply add
    #![allow(dead_code)]
    use coresimd::simd::*;

    #[allow(improper_ctypes)]
    extern "C" {
        #[link_name = "llvm.fma.v2f32"]
        fn fma_v2f32(x: f32x2, y: f32x2, z: f32x2) -> f32x2;
        #[link_name = "llvm.fma.v4f32"]
        fn fma_v4f32(x: f32x4, y: f32x4, z: f32x4) -> f32x4;
        #[link_name = "llvm.fma.v8f32"]
        fn fma_v8f32(x: f32x8, y: f32x8, z: f32x8) -> f32x8;
        #[link_name = "llvm.fma.v16f32"]
        fn fma_v16f32(x: f32x16, y: f32x16, z: f32x16) -> f32x16;
        #[link_name = "llvm.fma.v2f64"]
        fn fma_v2f64(x: f64x2, y: f64x2, z: f64x2) -> f64x2;
        #[link_name = "llvm.fma.v4f64"]
        fn fma_v4f64(x: f64x4, y: f64x4, z: f64x4) -> f64x4;
        #[link_name = "llvm.fma.v8f64"]
        fn fma_v8f64(x: f64x8, y: f64x8, z: f64x8) -> f64x8;
    }

    pub(crate) trait FloatFma {
        fn fma(self, y: Self, z: Self) -> Self;
    }

    macro_rules! impl_fma {
        ($id:ident : $fn:ident) => {
            #[cfg(not(target_arch = "s390x"))]
            impl FloatFma for $id {
                fn fma(self, y: Self, z: Self) -> Self {
                    unsafe { $fn(self, y, z) }
                }
            }
            // FIXME: https://github.com/rust-lang-nursery/stdsimd/issues/501
            #[cfg(target_arch = "s390x")]
            impl FloatFma for $id {
                fn fma(self, y: Self, z: Self) -> Self {
                    self * y + z
                }
            }
        };
    }

    impl_fma!(f32x2: fma_v2f32);
    impl_fma!(f32x4: fma_v4f32);
    impl_fma!(f32x8: fma_v8f32);
    impl_fma!(f32x16: fma_v16f32);
    impl_fma!(f64x2: fma_v2f64);
    impl_fma!(f64x4: fma_v4f64);
    impl_fma!(f64x8: fma_v8f64);

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