Designates an alternate entry point at which execution of a
  subprogram can start.  It is not executable and must precede any
  CONTAINS statement (if any) within the subprogram.  Statement
  format:

     ENTRY nam [([p[,p]...])] [RESULT (r-name)]]

     nam     Is a symbolic name for the entry point.  The name
             must be unique among all global names in the program.
             In a function subprogram, the data type defined for
             or implied by the name and the data type of the
             function must be consistent within the following groups:

             Group 1: Type default integer, default real, double
                      precision real, default complex, double complex,
                      or default logical
             Group 2: REAL(KIND=16) and COMPLEX(KIND=16)
             Group 3: Type default character

             If the data type is character, the length of the string
             must be the same in both the entry and the function.

     p       Is a dummy argument or an alternate return argument
             (designated by a *).  The arguments must agree in order,
             number, and type with the actual arguments of the
             statement invoking the entry point.  The arguments need
             not agree in name, order, number, or type with the dummy
             arguments in the SUBROUTINE or FUNCTION statement for the
             subprogram.  You must use only the dummy arguments
             defined in the ENTRY statement.

     r-name  Is the name of a function result.  This name must not be
             the same as the name of the entry point, or the name of
             any other function or function result.  This parameter
             can only be specified for function subprograms.

  The ENTRY statement is not executable and can appear within a
  function or subroutine program after the FUNCTION or SUBROUTINE
  statement.  Execution of a subprogram referred to by an entry name
  begins with the first executable statement after the ENTRY
  statement.

  An ENTRY statement must not appear in a CASE, DO, IF, FORALL, or
  WHERE construct or a nonblock DO loop.