Contents

• NAME
• SYNOPSIS
  • F95 INTERFACE
  • C INTERFACE
• PURPOSE
• ARGUMENTS

NAME

     cscal - Compute y := alpha * y

SYNOPSIS

     SUBROUTINE CSCAL(N, ALPHA, Y, INCY)

     COMPLEX ALPHA
     COMPLEX Y(*)
     INTEGER N, INCY

     SUBROUTINE CSCAL_64(N, ALPHA, Y, INCY)

     COMPLEX ALPHA
     COMPLEX Y(*)
     INTEGER*8 N, INCY

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

     COMPLEX :: ALPHA
     COMPLEX, DIMENSION(:) :: Y
     INTEGER :: N, INCY

     SUBROUTINE SCAL_64([N], ALPHA, Y, [INCY])

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

  C INTERFACE
     #include <sunperf.h>

     void cscal(int n, complex *alpha, complex *y, int incy);

     void cscal_64(long  n,  complex  *alpha,  complex  *y,  long
               incy);

PURPOSE

     cscal Compute y := alpha * y where alpha is a scalar  and  y
     is an n-vector.

ARGUMENTS

     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.

     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. INCY must not be zero.  Unchanged
               on exit.