Return to zcopy.f CVS log

Up to [local] / rpl / lapack / blas

Annotation of rpl/lapack/blas/zcopy.f, revision 1.15

1.8       bertrand    1: *> \brief \b ZCOPY
                      2: *
                      3: *  =========== DOCUMENTATION ===========
                      4: *
1.13      bertrand    5: * Online html documentation available at
                      6: *            http://www.netlib.org/lapack/explore-html/
1.8       bertrand    7: *
                      8: *  Definition:
                      9: *  ===========
                     10: *
                     11: *       SUBROUTINE ZCOPY(N,ZX,INCX,ZY,INCY)
1.13      bertrand   12: *
1.8       bertrand   13: *       .. Scalar Arguments ..
                     14: *       INTEGER INCX,INCY,N
                     15: *       ..
                     16: *       .. Array Arguments ..
                     17: *       COMPLEX*16 ZX(*),ZY(*)
                     18: *       ..
1.13      bertrand   19: *
1.8       bertrand   20: *
                     21: *> \par Purpose:
                     22: *  =============
                     23: *>
                     24: *> \verbatim
                     25: *>
                     26: *>    ZCOPY copies a vector, x, to a vector, y.
                     27: *> \endverbatim
                     28: *
1.14      bertrand   29: *  Arguments:
                     30: *  ==========
                     31: *
                     32: *> \param[in] N
                     33: *> \verbatim
                     34: *>          N is INTEGER
                     35: *>         number of elements in input vector(s)
                     36: *> \endverbatim
                     37: *>
                     38: *> \param[in] ZX
                     39: *> \verbatim
                     40: *>          ZX is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
                     41: *> \endverbatim
                     42: *>
                     43: *> \param[in] INCX
                     44: *> \verbatim
                     45: *>          INCX is INTEGER
                     46: *>         storage spacing between elements of ZX
                     47: *> \endverbatim
                     48: *>
                     49: *> \param[out] ZY
                     50: *> \verbatim
                     51: *>          ZY is COMPLEX*16 array, dimension ( 1 + ( N - 1 )*abs( INCY ) )
                     52: *> \endverbatim
                     53: *>
                     54: *> \param[in] INCY
                     55: *> \verbatim
                     56: *>          INCY is INTEGER
                     57: *>         storage spacing between elements of ZY
                     58: *> \endverbatim
                     59: *
1.8       bertrand   60: *  Authors:
                     61: *  ========
                     62: *
1.13      bertrand   63: *> \author Univ. of Tennessee
                     64: *> \author Univ. of California Berkeley
                     65: *> \author Univ. of Colorado Denver
                     66: *> \author NAG Ltd.
1.8       bertrand   67: *
1.14      bertrand   68: *> \date November 2017
1.8       bertrand   69: *
                     70: *> \ingroup complex16_blas_level1
                     71: *
                     72: *> \par Further Details:
                     73: *  =====================
                     74: *>
                     75: *> \verbatim
                     76: *>
                     77: *>     jack dongarra, linpack, 4/11/78.
                     78: *>     modified 12/3/93, array(1) declarations changed to array(*)
                     79: *> \endverbatim
                     80: *>
                     81: *  =====================================================================
1.1       bertrand   82:       SUBROUTINE ZCOPY(N,ZX,INCX,ZY,INCY)
1.8       bertrand   83: *
1.14      bertrand   84: *  -- Reference BLAS level1 routine (version 3.8.0) --
1.8       bertrand   85: *  -- Reference BLAS is a software package provided by Univ. of Tennessee,    --
                     86: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
1.14      bertrand   87: *     November 2017
1.8       bertrand   88: *
1.1       bertrand   89: *     .. Scalar Arguments ..
                     90:       INTEGER INCX,INCY,N
                     91: *     ..
                     92: *     .. Array Arguments ..
1.8       bertrand   93:       COMPLEX*16 ZX(*),ZY(*)
1.1       bertrand   94: *     ..
                     95: *
                     96: *  =====================================================================
                     97: *
                     98: *     .. Local Scalars ..
                     99:       INTEGER I,IX,IY
                    100: *     ..
                    101:       IF (N.LE.0) RETURN
1.7       bertrand  102:       IF (INCX.EQ.1 .AND. INCY.EQ.1) THEN
                    103: *
                    104: *        code for both increments equal to 1
                    105: *
                    106:          DO I = 1,N
                    107:           ZY(I) = ZX(I)
                    108:          END DO
                    109:       ELSE
1.1       bertrand  110: *
                    111: *        code for unequal increments or equal increments
                    112: *          not equal to 1
                    113: *
1.7       bertrand  114:          IX = 1
                    115:          IY = 1
                    116:          IF (INCX.LT.0) IX = (-N+1)*INCX + 1
                    117:          IF (INCY.LT.0) IY = (-N+1)*INCY + 1
                    118:          DO I = 1,N
                    119:             ZY(IY) = ZX(IX)
                    120:             IX = IX + INCX
                    121:             IY = IY + INCY
                    122:          END DO
                    123:       END IF
1.1       bertrand  124:       RETURN
                    125:       END