Contents
zdotu - compute the dot product of two vectors x and y.
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 DOT([N], X, [INCX], Y, [INCY])
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER :: N, INCX, INCY
COMPLEX(8) FUNCTION DOT_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, doub-
lecomplex *y, int incy);
doublecomplex zdotu_64(long n, doublecomplex *x, long incx,
doublecomplex *y, long incy);
zdotu compute the dot product of x and y where x and y are
n-vectors.
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.