A.5.111 FXRSTOR: Restore FP, MMX and SSE State
FXRSTOR memory ; 0F AE /1 [P6,SSE,FPU]
The FXRSTOR instruction reloads the FPU, MMX and SSE state (environment
and registers), from the 512 byte memory area defined by the source
operand. This data should have been written by a previous FXSAVE.