Developer Guide and Reference

Contents

_fxsave()

Saves the states of x87 FPU, MMX, XMM, and MXCSR registers to memory.

Syntax

extern void _fxsave(void *mem);
Arguments
mem
A memory reference to
FXSAVE
area. The 512-bytes memory addressed by the reference must be 16-bytes aligned.
Description
Saves the states of
x87 FPU
,
MMX
,
XMM
, and
MXCSR
registers to memory. This intrinsic maps to
FXSAVE
instruction.

Product and Performance Information