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    //! 32-bit wide portable packed vector types.

    simd_api_imports!();
    use coresimd::simd::b8x2;

    simd_i_ty! {
        i16x2: 2, i16, b8x2, i16x2_tests |
        i16, i16 |
        x0, x1 |
        /// A 32-bit wide vector with 2 `i16` lanes.
    }

    simd_u_ty! {
        u16x2: 2, u16, b8x2, u16x2_tests |
        u16, u16 |
        x0, x1 |
        /// A 32-bit wide vector with 2 `u16` lanes.
    }

    simd_i_ty! {
        i8x4: 4, i8, b8x4, i8x4_tests |
        i8, i8, i8, i8  |
        x0, x1, x2, x3 |
        /// A 32-bit wide vector with 4 `i8` lanes.
    }

    simd_u_ty! {
        u8x4: 4, u8, b8x4, u8x4_tests |
        u8, u8, u8, u8  |
        x0, x1, x2, x3 |
        /// A 32-bit wide vector with 4 `u8` lanes.
    }

    simd_b_ty! {
        b8x4: 4, i8, b8x4_tests |
        i8, i8, i8, i8  |
        x0, x1, x2, x3 |
        /// A 32-bit wide vector with 4 `bool` lanes.
    }

    impl_from_bits!(i16x2: i16, i16x2_from_bits | u16x2, i8x4, u8x4, b8x4);
    impl_from_bits!(u16x2: u16, u16x2_from_bits | i16x2, i8x4, u8x4, b8x4);
    impl_from_bits!(i8x4: i8, i8x2_from_bits | i16x2, u16x2, u8x4, b8x4);
    impl_from_bits!(u8x4: u8, u8x2_from_bits | i16x2, u16x2, i8x4, b8x4);

    impl_from!(
        i16x2: i16,
        i16x2_from | f64x2,
        u64x2,
        i64x2,
        f32x2,
        u32x2,
        i32x2,
        u16x2,
        u8x2,
        i8x2
    );

    impl_from!(
        u16x2: u16,
        u16x2_from | f64x2,
        u64x2,
        i64x2,
        f32x2,
        u32x2,
        i32x2,
        i16x2,
        u8x2,
        i8x2
    );

    impl_from!(
        i8x4: i8,
        i8x4_from | f64x4,
        u64x4,
        i64x4,
        u32x4,
        i32x4,
        f32x4,
        u16x4,
        i16x4,
        u8x4
    );

    impl_from!(
        u8x4: u8,
        u8x4_from | f64x4,
        u64x4,
        i64x4,
        u32x4,
        i32x4,
        f32x4,
        u16x4,
        i16x4,
        i8x4
    );

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