Controls the rounding mode to be used for IEEE floating-point
  calculations.

  You can only specify one of the qualifier options.

  CHOPPED
    Specifies to round toward zero.

  DYNAMIC
    Specifies to get the rounding mode at runtime.  For more
    information, see the HP Fortran for OpenVMS User Manual.

  MINUS_INFINITY
    Specifies to round toward the next smallest representation value.

  NEAREST
    Specifies to round toward the nearest representation value.  This
    is the default.