saxpy (3p)

Name

saxpy - compute y := alpha * x + y

Synopsis

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);

Description

Oracle Solaris Studio Performance Library                            saxpy(3P)



NAME
       saxpy - compute y := alpha * x + y


SYNOPSIS
       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);



PURPOSE
       saxpy  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)
                 ( 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.




                                  7 Nov 2015                         saxpy(3P)