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*> \brief \b ICOPY
*
* =========== DOCUMENTATION ===========
*
* Online html documentation available at
* http://www.netlib.org/lapack/explore-html/
*
* Definition:
* ===========
*
* SUBROUTINE ICOPY( N, SX, INCX, SY, INCY )
*
* .. Scalar Arguments ..
* INTEGER INCX, INCY, N
* ..
* .. Array Arguments ..
* INTEGER SX( * ), SY( * )
* ..
*
*
*> \par Purpose:
* =============
*>
*> \verbatim
*>
*> ICOPY copies an integer vector x to an integer vector y.
*> Uses unrolled loops for increments equal to 1.
*> \endverbatim
*
* Arguments:
* ==========
*
*> \param[in] N
*> \verbatim
*> N is INTEGER
*> The length of the vectors SX and SY.
*> \endverbatim
*>
*> \param[in] SX
*> \verbatim
*> SX is INTEGER array, dimension (1+(N-1)*abs(INCX))
*> The vector X.
*> \endverbatim
*>
*> \param[in] INCX
*> \verbatim
*> INCX is INTEGER
*> The spacing between consecutive elements of SX.
*> \endverbatim
*>
*> \param[out] SY
*> \verbatim
*> SY is INTEGER array, dimension (1+(N-1)*abs(INCY))
*> The vector Y.
*> \endverbatim
*>
*> \param[in] INCY
*> \verbatim
*> INCY is INTEGER
*> The spacing between consecutive elements of SY.
*> \endverbatim
*
* Authors:
* ========
*
*> \author Univ. of Tennessee
*> \author Univ. of California Berkeley
*> \author Univ. of Colorado Denver
*> \author NAG Ltd.
*
*> \date November 2011
*
*> \ingroup aux_lin
*
* =====================================================================
SUBROUTINE ICOPY( N, SX, INCX, SY, INCY )
*
* -- LAPACK test routine (version 3.4.0) --
* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
* November 2011
*
* .. Scalar Arguments ..
INTEGER INCX, INCY, N
* ..
* .. Array Arguments ..
INTEGER SX( * ), SY( * )
* ..
*
* =====================================================================
*
* .. Local Scalars ..
INTEGER I, IX, IY, M, MP1
* ..
* .. Intrinsic Functions ..
INTRINSIC MOD
* ..
* .. Executable Statements ..
*
IF( N.LE.0 )
$ RETURN
IF( INCX.EQ.1 .AND. INCY.EQ.1 )
$ GO TO 20
*
* Code for unequal increments or equal increments not equal to 1
*
IX = 1
IY = 1
IF( INCX.LT.0 )
$ IX = ( -N+1 )*INCX + 1
IF( INCY.LT.0 )
$ IY = ( -N+1 )*INCY + 1
DO 10 I = 1, N
SY( IY ) = SX( IX )
IX = IX + INCX
IY = IY + INCY
10 CONTINUE
RETURN
*
* Code for both increments equal to 1
*
* Clean-up loop
*
20 CONTINUE
M = MOD( N, 7 )
IF( M.EQ.0 )
$ GO TO 40
DO 30 I = 1, M
SY( I ) = SX( I )
30 CONTINUE
IF( N.LT.7 )
$ RETURN
40 CONTINUE
MP1 = M + 1
DO 50 I = MP1, N, 7
SY( I ) = SX( I )
SY( I+1 ) = SX( I+1 )
SY( I+2 ) = SX( I+2 )
SY( I+3 ) = SX( I+3 )
SY( I+4 ) = SX( I+4 )
SY( I+5 ) = SX( I+5 )
SY( I+6 ) = SX( I+6 )
50 CONTINUE
RETURN
*
* End of ICOPY
*
END
|
