LAHF - Load Register AH From Flags

        Usage:  LAHF
        Modifies flags: None

        Copies bits 0-7 of the flags register into AH.  This includes flags
        AF, CF, PF, SF and ZF other bits are undefined.

        AH := SF ZF xx AF xx PF xx CF

                                 Clocks                 Size
        Operands         808x  286   386   486          Bytes

        none              4     2     2     3             1

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