Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 12/16/2022
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents

_fxrstor()

Restores the states of x87 FPU, MMX, XMM, and MXCSR registers from memory.

Syntax

extern void _fxrstor(void *mem);

Arguments
mem

A memory reference to FXSAVE area. The 512-bytes memory addressed by the reference must be 16-bytes aligned.

Description

Restores the states of x87 FPU, MMX, XMM, and MXCSR registers from memory. This intrinsic maps to FXRSTOR instruction.