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    1: *> \brief \b DLACPY copies all or part of one two-dimensional array to another.
    2: *
    3: *  =========== DOCUMENTATION ===========
    4: *
    5: * Online html documentation available at
    6: *            http://www.netlib.org/lapack/explore-html/
    7: *
    8: *> \htmlonly
    9: *> Download DLACPY + dependencies
   10: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlacpy.f">
   11: *> [TGZ]</a>
   12: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlacpy.f">
   13: *> [ZIP]</a>
   14: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlacpy.f">
   15: *> [TXT]</a>
   16: *> \endhtmlonly
   17: *
   18: *  Definition:
   19: *  ===========
   20: *
   21: *       SUBROUTINE DLACPY( UPLO, M, N, A, LDA, B, LDB )
   22: *
   23: *       .. Scalar Arguments ..
   24: *       CHARACTER          UPLO
   25: *       INTEGER            LDA, LDB, M, N
   26: *       ..
   27: *       .. Array Arguments ..
   28: *       DOUBLE PRECISION   A( LDA, * ), B( LDB, * )
   29: *       ..
   30: *
   31: *
   32: *> \par Purpose:
   33: *  =============
   34: *>
   35: *> \verbatim
   36: *>
   37: *> DLACPY copies all or part of a two-dimensional matrix A to another
   38: *> matrix B.
   39: *> \endverbatim
   40: *
   41: *  Arguments:
   42: *  ==========
   43: *
   44: *> \param[in] UPLO
   45: *> \verbatim
   46: *>          UPLO is CHARACTER*1
   47: *>          Specifies the part of the matrix A to be copied to B.
   48: *>          = 'U':      Upper triangular part
   49: *>          = 'L':      Lower triangular part
   50: *>          Otherwise:  All of the matrix A
   51: *> \endverbatim
   52: *>
   53: *> \param[in] M
   54: *> \verbatim
   55: *>          M is INTEGER
   56: *>          The number of rows of the matrix A.  M >= 0.
   57: *> \endverbatim
   58: *>
   59: *> \param[in] N
   60: *> \verbatim
   61: *>          N is INTEGER
   62: *>          The number of columns of the matrix A.  N >= 0.
   63: *> \endverbatim
   64: *>
   65: *> \param[in] A
   66: *> \verbatim
   67: *>          A is DOUBLE PRECISION array, dimension (LDA,N)
   68: *>          The m by n matrix A.  If UPLO = 'U', only the upper triangle
   69: *>          or trapezoid is accessed; if UPLO = 'L', only the lower
   70: *>          triangle or trapezoid is accessed.
   71: *> \endverbatim
   72: *>
   73: *> \param[in] LDA
   74: *> \verbatim
   75: *>          LDA is INTEGER
   76: *>          The leading dimension of the array A.  LDA >= max(1,M).
   77: *> \endverbatim
   78: *>
   79: *> \param[out] B
   80: *> \verbatim
   81: *>          B is DOUBLE PRECISION array, dimension (LDB,N)
   82: *>          On exit, B = A in the locations specified by UPLO.
   83: *> \endverbatim
   84: *>
   85: *> \param[in] LDB
   86: *> \verbatim
   87: *>          LDB is INTEGER
   88: *>          The leading dimension of the array B.  LDB >= max(1,M).
   89: *> \endverbatim
   90: *
   91: *  Authors:
   92: *  ========
   93: *
   94: *> \author Univ. of Tennessee
   95: *> \author Univ. of California Berkeley
   96: *> \author Univ. of Colorado Denver
   97: *> \author NAG Ltd.
   98: *
   99: *> \date December 2016
  100: *
  101: *> \ingroup OTHERauxiliary
  102: *
  103: *  =====================================================================
  104:       SUBROUTINE DLACPY( UPLO, M, N, A, LDA, B, LDB )
  105: *
  106: *  -- LAPACK auxiliary routine (version 3.7.0) --
  107: *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
  108: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
  109: *     December 2016
  110: *
  111: *     .. Scalar Arguments ..
  112:       CHARACTER          UPLO
  113:       INTEGER            LDA, LDB, M, N
  114: *     ..
  115: *     .. Array Arguments ..
  116:       DOUBLE PRECISION   A( LDA, * ), B( LDB, * )
  117: *     ..
  118: *
  119: *  =====================================================================
  120: *
  121: *     .. Local Scalars ..
  122:       INTEGER            I, J
  123: *     ..
  124: *     .. External Functions ..
  125:       LOGICAL            LSAME
  126:       EXTERNAL           LSAME
  127: *     ..
  128: *     .. Intrinsic Functions ..
  129:       INTRINSIC          MIN
  130: *     ..
  131: *     .. Executable Statements ..
  132: *
  133:       IF( LSAME( UPLO, 'U' ) ) THEN
  134:          DO 20 J = 1, N
  135:             DO 10 I = 1, MIN( J, M )
  136:                B( I, J ) = A( I, J )
  137:    10       CONTINUE
  138:    20    CONTINUE
  139:       ELSE IF( LSAME( UPLO, 'L' ) ) THEN
  140:          DO 40 J = 1, N
  141:             DO 30 I = J, M
  142:                B( I, J ) = A( I, J )
  143:    30       CONTINUE
  144:    40    CONTINUE
  145:       ELSE
  146:          DO 60 J = 1, N
  147:             DO 50 I = 1, M
  148:                B( I, J ) = A( I, J )
  149:    50       CONTINUE
  150:    60    CONTINUE
  151:       END IF
  152:       RETURN
  153: *
  154: *     End of DLACPY
  155: *
  156:       END