(I64 only.) The Determine AST Exception Frame Dispatch routine
    determines whether a given PC value represents an AST dispatch
    frame.

    Format

      LIB$I64_IS_AST_DISPATCH_FRAME   pc_value

1  –  Returns

    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value

2  –  Argument

 pc_value

    OpenVMS usage:PC value
    type:         quadword
    access:       read
    mechanism:    by reference

    Address of a quadword that contains the PC value.

    The pc_value is used to find the operating system-specific data
    area in the unwind information for this routine.