zdotu(3P) Sun Performance Library zdotu(3P)NAMEzdotu - compute the dot product of two vectors x and y.
SYNOPSIS
DOUBLE COMPLEX FUNCTION ZDOTU(N, X, INCX, Y, INCY)
DOUBLE COMPLEX X(*), Y(*)
INTEGER N, INCX, INCY
DOUBLE COMPLEX FUNCTION ZDOTU_64(N, X, INCX, Y, INCY)
DOUBLE COMPLEX X(*), Y(*)
INTEGER*8 N, INCX, INCY
F95 INTERFACE
COMPLEX(8) FUNCTION DOTU([N], X, [INCX], Y, [INCY])
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER :: N, INCX, INCY
COMPLEX(8) FUNCTION DOTU_64([N], X, [INCX], Y, [INCY])
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER(8) :: N, INCX, INCY
C INTERFACE
#include <sunperf.h>
doublecomplex zdotu(int n, doublecomplex *x, int incx, doublecomplex
*y, int incy);
doublecomplex zdotu_64(long n, doublecomplex *x, long incx, doublecomā
plex *y, long incy);
PURPOSEzdotu 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 function 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.
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.
Unchanged on exit.
6 Mar 2009 zdotu(3P)