3.3.6 Control Instructions (Floating-Point)
The floating-point control instructions
operate on the floating-point register stack and save and restore the floating-point
state.
Table 3-19 Control Instructions (Floating-Point)
| | | |
|---|
|
| FCLEX
| clear floating-point exception flags after checking for error conditions
|
|
|
| FDECSTP
| decrement floating-point register stack pointer
|
|
|
| FFREE
| free floating-point register
|
|
|
| FINCSTP
| increment floating-point register stack pointer
|
|
|
| FINIT
| initialize floating-point unit after checking error conditions
|
|
|
| FLDCW
| load floating-point unit control word
|
|
|
| FLDENV
| load floating-point unit environment
|
|
|
| FNCLEX
| clear floating-point exception flags without checking for error conditions
|
|
|
| FNINIT
| initialize floating-point unit without checking error conditions
|
|
|
| FNOP
| floating-point no operation
|
|
|
| FNSAVE
| save floating-point unit state without checking error conditions
|
|
|
| FNSTCW
| store floating-point unit control word without checking error conditions
|
|
|
| FNSTENV
| store floating-point unit environment without checking error conditions
|
|
|
| FNSTSW
| store floating-point unit status word without checking error conditions
|
|
|
| FRSTOR
| restore floating-point unit state
|
|
|
| FSAVE
| save floating-point unit state after checking error conditions
|
|
|
| FSTCW
| store floating-point unit control word after checking error conditions
|
|
|
| FSTENV
| store floating-point unit environment after checking error conditions
|
|
|
| FSTSW
| store floating-point unit status word after checking error conditions
|
|
|
| FWAIT
| wait for floating-point unit
|
|
|
| WAIT
| wait for floating-point unit
|
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|