LAHF sets the AH register according to the contents of the
low byte of the flags word.
The operation of LAHF is:
AH <-- SF:ZF:0:AF:0:PF:1:CF
See also SAHF (SAHF).
lahf
8086 and laterLoad AH from Flags
lahfLoading...
Forms
Every form of lahf the assembler accepts, from NASM's own instruction table.
The second column is the processor that introduced the form; a badge marks a form that needs
an extension, that is lockable, or that long mode dropped.
| Form | Since | Notes |
|---|---|---|
| lahf | 8086 |