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FXAM            Examine condition flags              Exceptions: None
                                                     C3 C2 C1 C0: * * * *
FXAM

        Logic   CMP ST, ST
                set condition codes

    FXAM causes the FPU to examine the value currently in ST and to set
    the condition codes in the status word accordingly (see CC table).


    Opcode      Format
    D9 E5       FXAM


    Timing
    Operand       8087         287        387      486     Pentium
    -            12-23        12-23      30-38      8      21      NP