## ALP Programming Guide and Reference

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### Notes

As its opcode shows, FWAIT is not actually an ESC instruction, but an alternate mnemonic for WAIT.

Coding FWAIT after an ESC instruction ensures that any unmasked floating- point exceptions the instruction may cause are handled before the processor has a chance to modify the instruction's results.

Refer to the Intel documentation for more information about when to use FWAIT.