Developer Guide and Reference

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

Product and Performance Information