The Fix Floating Reserved Operand routine finds the reserved
    operand of any F-floating, D-floating, G-floating, or H-floating
    instruction (with some exceptions) after a reserved operand fault
    has been signaled. LIB$FIXUP_FLT changes the reserved operand
    from -0.0 to the value of the  new-operand argument, if present;
    or to +0.0 if  new-operand is absent.

    This routine is available on OpenVMS Alpha and I64 systems in
    translated form and is applicable to translated VAX images only.

    Format

      LIB$FIXUP_FLT  signal-arguments ,mechanism-arguments

                     [,new-operand]