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    1: *> \brief \b ZLASCL2 performs diagonal scaling on a vector.
    2: *
    3: *  =========== DOCUMENTATION ===========
    4: *
    5: * Online html documentation available at 
    6: *            http://www.netlib.org/lapack/explore-html/ 
    7: *
    8: *> \htmlonly
    9: *> Download ZLASCL2 + dependencies 
   10: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zlascl2.f"> 
   11: *> [TGZ]</a> 
   12: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zlascl2.f"> 
   13: *> [ZIP]</a> 
   14: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zlascl2.f"> 
   15: *> [TXT]</a>
   16: *> \endhtmlonly 
   17: *
   18: *  Definition:
   19: *  ===========
   20: *
   21: *       SUBROUTINE ZLASCL2 ( M, N, D, X, LDX )
   22: * 
   23: *       .. Scalar Arguments ..
   24: *       INTEGER            M, N, LDX
   25: *       ..
   26: *       .. Array Arguments ..
   27: *       DOUBLE PRECISION   D( * )
   28: *       COMPLEX*16         X( LDX, * )
   29: *       ..
   30: *  
   31: *
   32: *> \par Purpose:
   33: *  =============
   34: *>
   35: *> \verbatim
   36: *>
   37: *> ZLASCL2 performs a diagonal scaling on a vector:
   38: *>   x <-- D * x
   39: *> where the DOUBLE PRECISION diagonal matrix D is stored as a vector.
   40: *>
   41: *> Eventually to be replaced by BLAS_zge_diag_scale in the new BLAS
   42: *> standard.
   43: *> \endverbatim
   44: *
   45: *  Arguments:
   46: *  ==========
   47: *
   48: *> \param[in] M
   49: *> \verbatim
   50: *>          M is INTEGER
   51: *>     The number of rows of D and X. M >= 0.
   52: *> \endverbatim
   53: *>
   54: *> \param[in] N
   55: *> \verbatim
   56: *>          N is INTEGER
   57: *>     The number of columns of D and X. N >= 0.
   58: *> \endverbatim
   59: *>
   60: *> \param[in] D
   61: *> \verbatim
   62: *>          D is DOUBLE PRECISION array, length M
   63: *>     Diagonal matrix D, stored as a vector of length M.
   64: *> \endverbatim
   65: *>
   66: *> \param[in,out] X
   67: *> \verbatim
   68: *>          X is COMPLEX*16 array, dimension (LDX,N)
   69: *>     On entry, the vector X to be scaled by D.
   70: *>     On exit, the scaled vector.
   71: *> \endverbatim
   72: *>
   73: *> \param[in] LDX
   74: *> \verbatim
   75: *>          LDX is INTEGER
   76: *>     The leading dimension of the vector X. LDX >= 0.
   77: *> \endverbatim
   78: *
   79: *  Authors:
   80: *  ========
   81: *
   82: *> \author Univ. of Tennessee 
   83: *> \author Univ. of California Berkeley 
   84: *> \author Univ. of Colorado Denver 
   85: *> \author NAG Ltd. 
   86: *
   87: *> \date September 2012
   88: *
   89: *> \ingroup complex16OTHERcomputational
   90: *
   91: *  =====================================================================
   92:       SUBROUTINE ZLASCL2 ( M, N, D, X, LDX )
   93: *
   94: *  -- LAPACK computational routine (version 3.4.2) --
   95: *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
   96: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
   97: *     September 2012
   98: *
   99: *     .. Scalar Arguments ..
  100:       INTEGER            M, N, LDX
  101: *     ..
  102: *     .. Array Arguments ..
  103:       DOUBLE PRECISION   D( * )
  104:       COMPLEX*16         X( LDX, * )
  105: *     ..
  106: *
  107: *  =====================================================================
  108: *
  109: *     .. Local Scalars ..
  110:       INTEGER            I, J
  111: *     ..
  112: *     .. Executable Statements ..
  113: *
  114:       DO J = 1, N
  115:          DO I = 1, M
  116:             X( I, J ) = X( I, J ) * D( I )
  117:          END DO
  118:       END DO
  119: 
  120:       RETURN
  121:       END
  122: