NAME

zaxpy - Compute y := alpha ∗ x + y

SYNOPSIS

SUBROUTINE ZAXPY (N, ALPHA, X, INCY, Y, INCY )

COMPLEX∗16 ALPHA

INTEGER INCX, INCY, N

COMPLEX∗16 X( ∗ ), Y( ∗ )

#include <sunperf.h>

void zaxpy(int n, doublecomplex ∗za, doublecomplex ∗zx, int incx, doublecomplex ∗zy, int incy) ;

PURPOSE

ZAXPY - Compute y := alpha ∗ x + y where alpha is a scalar and x and y are n-vectors. 
 

PARAMETERS

N - INTEGER. 
On entry, N specifies the number of elements in the vector.  N must be at least one for the subroutine to have any visible effect.  Unchanged on exit.

ALPHA - COMPLEX∗16. 
On entry, ALPHA specifies the scalar alpha. Unchanged on exit.

X - COMPLEX∗16       array of DIMENSION at least
( 1 + ( n - 1 )∗abs( INCX ) ). Before entry, the incremented array X must contain the vector x. Unchanged on exit.

INCX - INTEGER. 
On entry, INCX specifies the increment for the elements of X. INCX must not be zero. Unchanged on exit.

Y - COMPLEX∗16       array of DIMENSION at least
( 1 + ( m - 1 )∗abs( INCY ) ). On entry, the incremented array Y must contain the vector y. On exit, Y is overwritten by the updated vector y.

INCY - INTEGER. 
On entry, INCY specifies the increment for the elements of Y. INCY must not be zero. Unchanged on exit.

SunOS 5.0  —  Last change: 10 Dec 1998