complex*16 function zdotu	(	integer	N,
		complex*16, dimension(*)	ZX,
		integer	INCX,
		complex*16, dimension(*)	ZY,
		integer	INCY
	)

ZDOTU

Purpose:

 ZDOTU forms the dot product of two complex vectors
      ZDOTU = X^T * Y

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Date

November 2015

Further Details:

     jack dongarra, 3/11/78.
     modified 12/3/93, array(1) declarations changed to array(*)

Definition at line 54 of file zdotu.f.

*
*  -- Reference BLAS level1 routine (version 3.6.0) --
*  -- Reference BLAS is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*     November 2015
*
*     .. Scalar Arguments ..
      INTEGER incx,incy,n
*     ..
*     .. Array Arguments ..
      COMPLEX*16 zx(*),zy(*)
*     ..
*
*  =====================================================================
*
*     .. Local Scalars ..
      COMPLEX*16 ztemp
      INTEGER i,ix,iy
*     ..
      ztemp = (0.0d0,0.0d0)
      zdotu = (0.0d0,0.0d0)
      IF (n.LE.0) RETURN
      IF (incx.EQ.1 .AND. incy.EQ.1) THEN
*
*        code for both increments equal to 1
*
         DO i = 1,n
            ztemp = ztemp + zx(i)*zy(i)
         END DO
      ELSE
*
*        code for unequal increments or equal increments
*          not equal to 1
*
         ix = 1
         iy = 1
         IF (incx.LT.0) ix = (-n+1)*incx + 1
         IF (incy.LT.0) iy = (-n+1)*incy + 1
         DO i = 1,n
            ztemp = ztemp + zx(ix)*zy(iy)
            ix = ix + incx
            iy = iy + incy
         END DO
      END IF
      zdotu = ztemp
      RETURN

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