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Annotation of rpl/lapack/lapack/zlacpy.f, revision 1.10

1.8       bertrand    1: *> \brief \b ZLACPY
                      2: *
                      3: *  =========== DOCUMENTATION ===========
                      4: *
                      5: * Online html documentation available at 
                      6: *            http://www.netlib.org/lapack/explore-html/ 
                      7: *
                      8: *> \htmlonly
                      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"> 
                     15: *> [TXT]</a>
                     16: *> \endhtmlonly 
                     17: *
                     18: *  Definition:
                     19: *  ===========
                     20: *
                     21: *       SUBROUTINE ZLACPY( 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: *       COMPLEX*16         A( LDA, * ), B( LDB, * )
                     29: *       ..
                     30: *  
                     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: *
                     94: *> \author Univ. of Tennessee 
                     95: *> \author Univ. of California Berkeley 
                     96: *> \author Univ. of Colorado Denver 
                     97: *> \author NAG Ltd. 
                     98: *
                     99: *> \date November 2011
                    100: *
                    101: *> \ingroup complex16OTHERauxiliary
                    102: *
                    103: *  =====================================================================
1.1       bertrand  104:       SUBROUTINE ZLACPY( UPLO, M, N, A, LDA, B, LDB )
                    105: *
1.8       bertrand  106: *  -- LAPACK auxiliary routine (version 3.4.0) --
1.1       bertrand  107: *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
                    108: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
1.8       bertrand  109: *     November 2011
1.1       bertrand  110: *
                    111: *     .. Scalar Arguments ..
                    112:       CHARACTER          UPLO
                    113:       INTEGER            LDA, LDB, M, N
                    114: *     ..
                    115: *     .. Array Arguments ..
                    116:       COMPLEX*16         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: *
                    140:       ELSE IF( LSAME( UPLO, 'L' ) ) THEN
                    141:          DO 40 J = 1, N
                    142:             DO 30 I = J, M
                    143:                B( I, J ) = A( I, J )
                    144:    30       CONTINUE
                    145:    40    CONTINUE
                    146: *
                    147:       ELSE
                    148:          DO 60 J = 1, N
                    149:             DO 50 I = 1, M
                    150:                B( I, J ) = A( I, J )
                    151:    50       CONTINUE
                    152:    60    CONTINUE
                    153:       END IF
                    154: *
                    155:       RETURN
                    156: *
                    157: *     End of ZLACPY
                    158: *
                    159:       END