Intel® C++ Compiler Classic Developer Guide and Reference

ID 767249
Date 7/13/2023
Public
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.