Contents

• NAME
• SYNOPSIS
  • F95 INTERFACE
  • C INTERFACE
• PURPOSE
• ARGUMENTS

NAME

     cdotu - compute the dot product of two vectors x and y.

SYNOPSIS

     COMPLEX FUNCTION CDOTU(N, X, INCX, Y, INCY)

     COMPLEX X(*), Y(*)
     INTEGER N, INCX, INCY

     COMPLEX FUNCTION CDOTU_64(N, X, INCX, Y, INCY)

     COMPLEX X(*), Y(*)
     INTEGER*8 N, INCX, INCY

  F95 INTERFACE
     COMPLEX FUNCTION DOT([N], X, [INCX], Y, [INCY])

     COMPLEX, DIMENSION(:) :: X, Y
     INTEGER :: N, INCX, INCY

     COMPLEX FUNCTION DOT_64([N], X, [INCX], Y, [INCY])

     COMPLEX, DIMENSION(:) :: X, Y
     INTEGER(8) :: N, INCX, INCY

  C INTERFACE
     #include <sunperf.h>

     complex cdotu(int n, complex *x, int incx, complex  *y,  int
               incy);

     complex cdotu_64(long n, complex *x, long incx, complex  *y,
               long incy);

PURPOSE

     cdotu compute the dot product of x and y where x and  y  are
     n-vectors.

ARGUMENTS

     N (input)
               On entry, N specifies the number  of  elements  in
               the  vector.   If N is not positive then the func-
               tion returns the value 0.0.  Unchanged on exit.
     X (input)
               of DIMENSION at least ( 1 + ( n - 1 )*abs( INCX  )
               ).  On entry, the incremented array X must contain
               the vector x.  Unchanged on exit.

     INCX (input)
               On entry, INCX specifies  the  increment  for  the
               elements  of  X. INCX must not be zero.  Unchanged
               on exit.

     Y (input)
               of DIMENSION at least ( 1 + ( n - 1 )*abs( INCY  )
               ).  On entry, the incremented array Y must contain
               the vector y.  Unchanged on exit.

     INCY (input)
               On entry, INCY specifies  the  increment  for  the
               elements  of  Y. INCY must not be zero.  Unchanged
               on exit.