Function core::arch::x86::_mm256_unpacklo_epi64

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

This is supported on x86 and target feature avx2 only.

Unpacks and interleave 64-bit integers from the low half of each 128-bit lane of a and b.

#[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);

Intel’s documentation