forked from lijiext/lammps
95 lines
2.0 KiB
Fortran
95 lines
2.0 KiB
Fortran
*> \brief \b ZCOPY
|
|
*
|
|
* =========== DOCUMENTATION ===========
|
|
*
|
|
* Online html documentation available at
|
|
* http://www.netlib.org/lapack/explore-html/
|
|
*
|
|
* Definition:
|
|
* ===========
|
|
*
|
|
* SUBROUTINE ZCOPY(N,ZX,INCX,ZY,INCY)
|
|
*
|
|
* .. Scalar Arguments ..
|
|
* INTEGER INCX,INCY,N
|
|
* ..
|
|
* .. Array Arguments ..
|
|
* COMPLEX*16 ZX(*),ZY(*)
|
|
* ..
|
|
*
|
|
*
|
|
*> \par Purpose:
|
|
* =============
|
|
*>
|
|
*> \verbatim
|
|
*>
|
|
*> ZCOPY copies a vector, x, to a vector, y.
|
|
*> \endverbatim
|
|
*
|
|
* Authors:
|
|
* ========
|
|
*
|
|
*> \author Univ. of Tennessee
|
|
*> \author Univ. of California Berkeley
|
|
*> \author Univ. of Colorado Denver
|
|
*> \author NAG Ltd.
|
|
*
|
|
*> \date November 2011
|
|
*
|
|
*> \ingroup complex16_blas_level1
|
|
*
|
|
*> \par Further Details:
|
|
* =====================
|
|
*>
|
|
*> \verbatim
|
|
*>
|
|
*> jack dongarra, linpack, 4/11/78.
|
|
*> modified 12/3/93, array(1) declarations changed to array(*)
|
|
*> \endverbatim
|
|
*>
|
|
* =====================================================================
|
|
SUBROUTINE ZCOPY(N,ZX,INCX,ZY,INCY)
|
|
*
|
|
* -- Reference BLAS level1 routine (version 3.4.0) --
|
|
* -- Reference BLAS 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 ..
|
|
COMPLEX*16 ZX(*),ZY(*)
|
|
* ..
|
|
*
|
|
* =====================================================================
|
|
*
|
|
* .. Local Scalars ..
|
|
INTEGER I,IX,IY
|
|
* ..
|
|
IF (N.LE.0) RETURN
|
|
IF (INCX.EQ.1 .AND. INCY.EQ.1) THEN
|
|
*
|
|
* code for both increments equal to 1
|
|
*
|
|
DO I = 1,N
|
|
ZY(I) = ZX(I)
|
|
END DO
|
|
ELSE
|
|
*
|
|
* 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 I = 1,N
|
|
ZY(IY) = ZX(IX)
|
|
IX = IX + INCX
|
|
IY = IY + INCY
|
|
END DO
|
|
END IF
|
|
RETURN
|
|
END
|