Function core::arch::x86::_mm256_unpacklo_epi64

pub unsafe fn _mm256_unpacklo_epi64(a: __m256i, b: __m256i) -> __m256i

Available on (x86 or x86-64) and target feature avx2 and x86 only.

从每个字节的下半部分拆包并交织 64 位整数 a 和 b 的 128 位 lane

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

let a = _mm256_setr_epi64x(0, 1, 2, 3);
let b = _mm256_setr_epi64x(0, -1, -2, -3);

let c = _mm256_unpacklo_epi64(a, b);

let expected = _mm256_setr_epi64x(0, 0, 2, -2);
assert_eq!(_mm256_movemask_epi8(_mm256_cmpeq_epi8(c, expected)), !0);

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