VMS Help FORTRAN, Intrinsic Procedures, xNRSQ  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  REAL*4 SNRSQ  (n, x, incx)
  REAL*8 DNRSQ  (n, x, incx)
  REAL*4 SCNRSQ (n, x, incx)
  REAL*8 DZNRSQ (n, x, incx)

  Functions that return the sum of the squares of the absolute values
  of the elements of array "x".  For the purposes of these routines,
  the absolute value of a complex value is the square root of the sum
  of the squares of the real and imaginary parts.

  These routines are part of the BLAS1 Extended Set, and are
  available only on VAX processors.  The Compaq Extended Math
  Library product may be needed to resolve references to Extended Set
  routines that are not expanded inline by the compiler.

  Arguments

    n

    Integer number of elements in array "x" to be accessed.

    x

    Array containing the elements to be accessed or array reference
    to the first such element.  The data type is REAL*4 for SNRSQ,
    REAL*8 for DNRSQ, COMPLEX*8 for SCNRSQ, COMPLEX*16 for DZNRSQ.

    incx

    Integer index increment used in selecting which elements of array
    "x" are accessed.