Contents
saxpy - compute y := alpha * x + y
SUBROUTINE SAXPY(N, ALPHA, X, INCX, Y, INCY)
INTEGER N, INCX, INCY
REAL ALPHA
REAL X(*), Y(*)
SUBROUTINE SAXPY_64(N, ALPHA, X, INCX, Y, INCY)
INTEGER*8 N, INCX, INCY
REAL ALPHA
REAL X(*), Y(*)
F95 INTERFACE
SUBROUTINE AXPY([N], ALPHA, X, [INCX], Y, [INCY])
INTEGER :: N, INCX, INCY
REAL :: ALPHA
REAL, DIMENSION(:) :: X, Y
SUBROUTINE AXPY_64([N], ALPHA, X, [INCX], Y, [INCY])
INTEGER(8) :: N, INCX, INCY
REAL :: ALPHA
REAL, DIMENSION(:) :: X, Y
C INTERFACE
#include <sunperf.h>
void saxpy(int n, float alpha, float *x, int incx, float *y,
int incy);
void saxpy_64(long n, float alpha, float *x, long incx,
float *y, long incy);
saxpy compute y := alpha * x + y where alpha is a scalar and
x and y are n-vectors.
N (input)
On entry, N specifies the number of elements in
the vector. N must be at least one for the sub-
routine to have any visible effect. Unchanged on
exit.
ALPHA (input)
On entry, ALPHA specifies the scalar alpha.
Unchanged on exit.
X (input)
( 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)
( 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.