# _mm256_unpacklo_epi8/16/32/64

Unpacks and interleaves the low-order data elements of the source vector with the low-order data elements in the destination vector. The corresponding Intel® AVX2 instruction is VPUNPCKLBW, VPUNPCKLWD, VPUNPCKLDQ, or VPUNPCKLQDQ.

## Syntax

extern __m256i _mm256_unpacklo_epi8(__m256i a, __m256i b);

extern __m256i _mm256_unpacklo_epi16(__m256i a, __m256i b);

extern __m256i _mm256_unpacklo_epi32(__m256i a, __m256i b);

extern __m256i _mm256_unpacklo_epi64(__m256i a, __m256i b);

## Arguments

a | integer source vector used for the operation
b | integer source vector used for the operation

## Description

Unpacks and interleaves the low-order signed or unsigned data elements (bytes, words, doublewords, and quadwords) of the source vector and the low-order signed or unsigned data elements (bytes, words, doublewords, and quadwords) in the destination operand. The high-order data elements are ignored.

## Returns

Result of the interleave operation

Parent topic: Intrinsics for Pack/Unpack Operations