dscal (3p)

Name

dscal - Compute y := alpha * y

Synopsis

SUBROUTINE DSCAL(N, ALPHA, Y, INCY)

INTEGER N, INCY
DOUBLE PRECISION ALPHA
DOUBLE PRECISION Y(*)

SUBROUTINE DSCAL_64(N, ALPHA, Y, INCY)

INTEGER*8 N, INCY
DOUBLE PRECISION ALPHA
DOUBLE PRECISION Y(*)




F95 INTERFACE
SUBROUTINE SCAL(N, ALPHA, Y, INCY)

INTEGER :: N, INCY
REAL(8) :: ALPHA
REAL(8), DIMENSION(:) :: Y

SUBROUTINE SCAL_64(N, ALPHA, Y, INCY)

INTEGER(8) :: N, INCY
REAL(8) :: ALPHA
REAL(8), DIMENSION(:) :: Y




C INTERFACE
#include <sunperf.h>

void dscal(int n, double alpha, double *y, int incy);

void dscal_64(long n, double alpha, double *y, long incy);

Description

Oracle Solaris Studio Performance Library                            dscal(3P)



NAME
       dscal - Compute y := alpha * y


SYNOPSIS
       SUBROUTINE DSCAL(N, ALPHA, Y, INCY)

       INTEGER N, INCY
       DOUBLE PRECISION ALPHA
       DOUBLE PRECISION Y(*)

       SUBROUTINE DSCAL_64(N, ALPHA, Y, INCY)

       INTEGER*8 N, INCY
       DOUBLE PRECISION ALPHA
       DOUBLE PRECISION Y(*)




   F95 INTERFACE
       SUBROUTINE SCAL(N, ALPHA, Y, INCY)

       INTEGER :: N, INCY
       REAL(8) :: ALPHA
       REAL(8), DIMENSION(:) :: Y

       SUBROUTINE SCAL_64(N, ALPHA, Y, INCY)

       INTEGER(8) :: N, INCY
       REAL(8) :: ALPHA
       REAL(8), DIMENSION(:) :: Y




   C INTERFACE
       #include <sunperf.h>

       void dscal(int n, double alpha, double *y, int incy);

       void dscal_64(long n, double alpha, double *y, long incy);



PURPOSE
       dscal Compute y := alpha * y where alpha is a scalar and y is an n-vec-
       tor.


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.


       Y (input/output)
                 (  1  +  ( n - 1 )*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.
                 This routine returns immediately if  INCY  is  less  than  or
                 equal to zero.  Unchanged on exit.




                                  7 Nov 2015                         dscal(3P)