_fxsave
Classification
Other, OS-Targeted, CPUID Test: FXSR
Header File
immintrin.h
Instruction
FXSAVE m512
Synopsis
 _fxsave(void * mem_addr);
Description
Save the current state of the x87 FPU, MMX technology, XMM, and MXCSR registers to a 512-byte memory location at "mem_addr". The layout of the 512-byte region depends on the operating mode. Bytes [511:464] are available for software use and will not be overwritten by the processor.
Operation
MEM[mem_addr+512*8:mem_addr] := fxsave(state_x87_fpu_mmx_sse)