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    1: *> \brief \b ZCOPY
    2: *
    3: *  =========== DOCUMENTATION ===========
    4: *
    5: * Online html documentation available at
    6: *            http://www.netlib.org/lapack/explore-html/
    7: *
    8: *  Definition:
    9: *  ===========
   10: *
   11: *       SUBROUTINE ZCOPY(N,ZX,INCX,ZY,INCY)
   12: *
   13: *       .. Scalar Arguments ..
   14: *       INTEGER INCX,INCY,N
   15: *       ..
   16: *       .. Array Arguments ..
   17: *       COMPLEX*16 ZX(*),ZY(*)
   18: *       ..
   19: *
   20: *
   21: *> \par Purpose:
   22: *  =============
   23: *>
   24: *> \verbatim
   25: *>
   26: *>    ZCOPY copies a vector, x, to a vector, y.
   27: *> \endverbatim
   28: *
   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: *
   60: *  Authors:
   61: *  ========
   62: *
   63: *> \author Univ. of Tennessee
   64: *> \author Univ. of California Berkeley
   65: *> \author Univ. of Colorado Denver
   66: *> \author NAG Ltd.
   67: *
   68: *> \date November 2017
   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: *  =====================================================================
   82:       SUBROUTINE ZCOPY(N,ZX,INCX,ZY,INCY)
   83: *
   84: *  -- Reference BLAS level1 routine (version 3.8.0) --
   85: *  -- Reference BLAS is a software package provided by Univ. of Tennessee,    --
   86: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
   87: *     November 2017
   88: *
   89: *     .. Scalar Arguments ..
   90:       INTEGER INCX,INCY,N
   91: *     ..
   92: *     .. Array Arguments ..
   93:       COMPLEX*16 ZX(*),ZY(*)
   94: *     ..
   95: *
   96: *  =====================================================================
   97: *
   98: *     .. Local Scalars ..
   99:       INTEGER I,IX,IY
  100: *     ..
  101:       IF (N.LE.0) RETURN
  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
  110: *
  111: *        code for unequal increments or equal increments
  112: *          not equal to 1
  113: *
  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
  124:       RETURN
  125:       END