zaxpy(3P) Sun Performance Library zaxpy(3P)NAMEzaxpy - compute y := alpha * x + y
SYNOPSIS
SUBROUTINE ZAXPY(N, ALPHA, X, INCX, Y, INCY)
DOUBLE COMPLEX ALPHA
DOUBLE COMPLEX X(*), Y(*)
INTEGER N, INCX, INCY
SUBROUTINE ZAXPY_64(N, ALPHA, X, INCX, Y, INCY)
DOUBLE COMPLEX ALPHA
DOUBLE COMPLEX X(*), Y(*)
INTEGER*8 N, INCX, INCY
F95 INTERFACE
SUBROUTINE AXPY([N], ALPHA, X, [INCX], Y, [INCY])
COMPLEX(8) :: ALPHA
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER :: N, INCX, INCY
SUBROUTINE AXPY_64([N], ALPHA, X, [INCX], Y, [INCY])
COMPLEX(8) :: ALPHA
COMPLEX(8), DIMENSION(:) :: X, Y
INTEGER(8) :: N, INCX, INCY
C INTERFACE
#include <sunperf.h>
void zaxpy(int n, doublecomplex *alpha, doublecomplex *x, int incx,
doublecomplex *y, int incy);
void zaxpy_64(long n, doublecomplex *alpha, doublecomplex *x, long
incx, doublecomplex *y, long incy);
PURPOSEzaxpy compute y := alpha * x + y where alpha is a scalar and x and y
are n-vectors.
ARGUMENTS
N (input)
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 (input)
On entry, ALPHA specifies the scalar alpha. Unchanged on
exit.
X (input)
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 (input)
On entry, INCX specifies the increment for the elements of X.
Unchanged on exit.
Y (input/output)
array of DIMENSION at least ( 1 + ( n - 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 (input)
On entry, INCY specifies the increment for the elements of Y.
Unchanged on exit.
6 Mar 2009 zaxpy(3P)