The Integer Overflow Detection routine enables or disables
    integer overflow detection for the calling routine activation.
    The previous integer overflow enable setting is returned.

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

    Format

      LIB$INT_OVER  new-setting

1 - Returns

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

    Old integer overflow enable setting (the previous contents of
    SF$W_PSW[PSW$V_IV] in the caller's frame).

2 - Argument

  new-setting

    OpenVMS usage:longword_unsigned
    type:         longword (unsigned)
    access:       read only
    mechanism:    by reference

    New integer overflow enable setting. The new-setting argument is
    the address of an unsigned longword that contains the new integer
    overflow enable setting. Bit 0 set to 1 means enable, bit 0 set
    to 0 means disable.