x86 Assembly Language Reference Manual
Processor Control Instructions
Initialize Processor (finit, fnint)
finitfninit
Example
finit
No Operation (fnop)
fnop
Example
fnop
Save State (fsave, fnsave)
fsave
fnsave
Example
fsave 2(%ecx)
Store Control Word (fstcw, fnstcw)
fstcw
fnstcw
Example
fstcw 2(%ecx)
Store Environment (fstenv, fnstenv)
fstenv
fnstenv
Example
fstenv 2(%ecx)
Store Status Word (fstsw, fnstsw)
fstsw
fnstsw
Example
fstsw %ax
Restore State (frstor)
frstor
Example
frstor 2(%ecx)
CPU Wait (fwait, wait)
fwait
wait
Example
fwait
Clear Exceptions (fclex, fnclex)
fclex
fnclex
Example
fclex
Decrement Stack Pointer (fdecstp)
fdecstp
Example
fdecstp
Free Registers (ffree)
ffree
Example
ffree %st(7)
Increment Stack Pointer (fincstp)
fincstp
Example
fincstp
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