Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 7/13/2023
Public
Document Table of Contents

_mm256_zeroall

Zeroes all YMM registers. The corresponding Intel® AVX instruction is VZEROALL.

Syntax

extern void _mm256_zeroall(void);

Arguments

None

Description

Zeroes all YMM registers. This intrinsic is useful to clear all the YMM registers when transitioning between Intel® Advanced Vector Extensions (Intel® AVX) instructions and legacy Intel® Supplemental SIMD Extensions (Intel® SSE) instructions.

There is no transition penalty if an application clears the bits of all YMM registers (sets to ‘0’) via VZEROALL, the corresponding instruction for this intrinsic, before transitioning between Intel® Advanced Vector Extensions (Intel® AVX) instructions and legacy Intel® Supplemental SIMD Extensions (Intel® SSE) instructions.

Returns

Nothing