Function core::arch::x86_64::_mm_alignr_epi64

pub unsafe fn _mm_alignr_epi64(
    a: __m128i,
    b: __m128i,
    const IMM8: i32
) -> __m128i

🔬This is a nightly-only experimental API. (stdsimd #48556)

Available on (x86 or x86-64) and target feature avx512f,avx512vl and x86-64 only.

将 a 和 b 连接成一个 32 字节的 immediate 结果，将结果右移 imm8 个 64 位元素，并将低 16 字节 (2 个元素) 存储在 dst 中。

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