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Annotation of rpl/lapack/lapack/zlacpy.f, revision 1.18

1.11      bertrand    1: *> \brief \b ZLACPY copies all or part of one two-dimensional array to another.
1.8       bertrand    2: *
                      3: *  =========== DOCUMENTATION ===========
                      4: *
1.15      bertrand    5: * Online html documentation available at
                      6: *            http://www.netlib.org/lapack/explore-html/
1.8       bertrand    7: *
                      8: *> \htmlonly
1.15      bertrand    9: *> Download ZLACPY + dependencies
                     10: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zlacpy.f">
                     11: *> [TGZ]</a>
                     12: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zlacpy.f">
                     13: *> [ZIP]</a>
                     14: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zlacpy.f">
1.8       bertrand   15: *> [TXT]</a>
1.15      bertrand   16: *> \endhtmlonly
1.8       bertrand   17: *
                     18: *  Definition:
                     19: *  ===========
                     20: *
                     21: *       SUBROUTINE ZLACPY( UPLO, M, N, A, LDA, B, LDB )
1.15      bertrand   22: *
1.8       bertrand   23: *       .. Scalar Arguments ..
                     24: *       CHARACTER          UPLO
                     25: *       INTEGER            LDA, LDB, M, N
                     26: *       ..
                     27: *       .. Array Arguments ..
                     28: *       COMPLEX*16         A( LDA, * ), B( LDB, * )
                     29: *       ..
1.15      bertrand   30: *
1.8       bertrand   31: *
                     32: *> \par Purpose:
                     33: *  =============
                     34: *>
                     35: *> \verbatim
                     36: *>
                     37: *> ZLACPY 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 COMPLEX*16 array, dimension (LDA,N)
                     68: *>          The m by n matrix A.  If UPLO = 'U', only the upper trapezium
                     69: *>          is accessed; if UPLO = 'L', only the lower trapezium is
                     70: *>          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 COMPLEX*16 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: *
1.15      bertrand   94: *> \author Univ. of Tennessee
                     95: *> \author Univ. of California Berkeley
                     96: *> \author Univ. of Colorado Denver
                     97: *> \author NAG Ltd.
1.8       bertrand   98: *
                     99: *> \ingroup complex16OTHERauxiliary
                    100: *
                    101: *  =====================================================================
1.1       bertrand  102:       SUBROUTINE ZLACPY( UPLO, M, N, A, LDA, B, LDB )
                    103: *
1.18    ! bertrand  104: *  -- LAPACK auxiliary routine --
1.1       bertrand  105: *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
                    106: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
                    107: *
                    108: *     .. Scalar Arguments ..
                    109:       CHARACTER          UPLO
                    110:       INTEGER            LDA, LDB, M, N
                    111: *     ..
                    112: *     .. Array Arguments ..
                    113:       COMPLEX*16         A( LDA, * ), B( LDB, * )
                    114: *     ..
                    115: *
                    116: *  =====================================================================
                    117: *
                    118: *     .. Local Scalars ..
                    119:       INTEGER            I, J
                    120: *     ..
                    121: *     .. External Functions ..
                    122:       LOGICAL            LSAME
                    123:       EXTERNAL           LSAME
                    124: *     ..
                    125: *     .. Intrinsic Functions ..
                    126:       INTRINSIC          MIN
                    127: *     ..
                    128: *     .. Executable Statements ..
                    129: *
                    130:       IF( LSAME( UPLO, 'U' ) ) THEN
                    131:          DO 20 J = 1, N
                    132:             DO 10 I = 1, MIN( J, M )
                    133:                B( I, J ) = A( I, J )
                    134:    10       CONTINUE
                    135:    20    CONTINUE
                    136: *
                    137:       ELSE IF( LSAME( UPLO, 'L' ) ) THEN
                    138:          DO 40 J = 1, N
                    139:             DO 30 I = J, M
                    140:                B( I, J ) = A( I, J )
                    141:    30       CONTINUE
                    142:    40    CONTINUE
                    143: *
                    144:       ELSE
                    145:          DO 60 J = 1, N
                    146:             DO 50 I = 1, M
                    147:                B( I, J ) = A( I, J )
                    148:    50       CONTINUE
                    149:    60    CONTINUE
                    150:       END IF
                    151: *
                    152:       RETURN
                    153: *
                    154: *     End of ZLACPY
                    155: *
                    156:       END