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Annotation of rpl/lapack/lapack/zlacp2.f, revision 1.12

1.11      bertrand    1: *> \brief \b ZLACP2 copies all or part of a real two-dimensional array to a complex array.
1.8       bertrand    2: *
                      3: *  =========== DOCUMENTATION ===========
                      4: *
                      5: * Online html documentation available at 
                      6: *            http://www.netlib.org/lapack/explore-html/ 
                      7: *
                      8: *> \htmlonly
                      9: *> Download ZLACP2 + dependencies 
                     10: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zlacp2.f"> 
                     11: *> [TGZ]</a> 
                     12: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zlacp2.f"> 
                     13: *> [ZIP]</a> 
                     14: *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zlacp2.f"> 
                     15: *> [TXT]</a>
                     16: *> \endhtmlonly 
                     17: *
                     18: *  Definition:
                     19: *  ===========
                     20: *
                     21: *       SUBROUTINE ZLACP2( 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, * )
                     29: *       COMPLEX*16         B( LDB, * )
                     30: *       ..
                     31: *  
                     32: *
                     33: *> \par Purpose:
                     34: *  =============
                     35: *>
                     36: *> \verbatim
                     37: *>
                     38: *> ZLACP2 copies all or part of a real two-dimensional matrix A to a
                     39: *> complex matrix B.
                     40: *> \endverbatim
                     41: *
                     42: *  Arguments:
                     43: *  ==========
                     44: *
                     45: *> \param[in] UPLO
                     46: *> \verbatim
                     47: *>          UPLO is CHARACTER*1
                     48: *>          Specifies the part of the matrix A to be copied to B.
                     49: *>          = 'U':      Upper triangular part
                     50: *>          = 'L':      Lower triangular part
                     51: *>          Otherwise:  All of the matrix A
                     52: *> \endverbatim
                     53: *>
                     54: *> \param[in] M
                     55: *> \verbatim
                     56: *>          M is INTEGER
                     57: *>          The number of rows of the matrix A.  M >= 0.
                     58: *> \endverbatim
                     59: *>
                     60: *> \param[in] N
                     61: *> \verbatim
                     62: *>          N is INTEGER
                     63: *>          The number of columns of the matrix A.  N >= 0.
                     64: *> \endverbatim
                     65: *>
                     66: *> \param[in] A
                     67: *> \verbatim
                     68: *>          A is DOUBLE PRECISION array, dimension (LDA,N)
                     69: *>          The m by n matrix A.  If UPLO = 'U', only the upper trapezium
                     70: *>          is accessed; if UPLO = 'L', only the lower trapezium is
                     71: *>          accessed.
                     72: *> \endverbatim
                     73: *>
                     74: *> \param[in] LDA
                     75: *> \verbatim
                     76: *>          LDA is INTEGER
                     77: *>          The leading dimension of the array A.  LDA >= max(1,M).
                     78: *> \endverbatim
                     79: *>
                     80: *> \param[out] B
                     81: *> \verbatim
                     82: *>          B is COMPLEX*16 array, dimension (LDB,N)
                     83: *>          On exit, B = A in the locations specified by UPLO.
                     84: *> \endverbatim
                     85: *>
                     86: *> \param[in] LDB
                     87: *> \verbatim
                     88: *>          LDB is INTEGER
                     89: *>          The leading dimension of the array B.  LDB >= max(1,M).
                     90: *> \endverbatim
                     91: *
                     92: *  Authors:
                     93: *  ========
                     94: *
                     95: *> \author Univ. of Tennessee 
                     96: *> \author Univ. of California Berkeley 
                     97: *> \author Univ. of Colorado Denver 
                     98: *> \author NAG Ltd. 
                     99: *
1.11      bertrand  100: *> \date September 2012
1.8       bertrand  101: *
                    102: *> \ingroup complex16OTHERauxiliary
                    103: *
                    104: *  =====================================================================
1.1       bertrand  105:       SUBROUTINE ZLACP2( UPLO, M, N, A, LDA, B, LDB )
                    106: *
1.11      bertrand  107: *  -- LAPACK auxiliary routine (version 3.4.2) --
1.1       bertrand  108: *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
                    109: *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
1.11      bertrand  110: *     September 2012
1.1       bertrand  111: *
                    112: *     .. Scalar Arguments ..
                    113:       CHARACTER          UPLO
                    114:       INTEGER            LDA, LDB, M, N
                    115: *     ..
                    116: *     .. Array Arguments ..
                    117:       DOUBLE PRECISION   A( LDA, * )
                    118:       COMPLEX*16         B( LDB, * )
                    119: *     ..
                    120: *
                    121: *  =====================================================================
                    122: *
                    123: *     .. Local Scalars ..
                    124:       INTEGER            I, J
                    125: *     ..
                    126: *     .. External Functions ..
                    127:       LOGICAL            LSAME
                    128:       EXTERNAL           LSAME
                    129: *     ..
                    130: *     .. Intrinsic Functions ..
                    131:       INTRINSIC          MIN
                    132: *     ..
                    133: *     .. Executable Statements ..
                    134: *
                    135:       IF( LSAME( UPLO, 'U' ) ) THEN
                    136:          DO 20 J = 1, N
                    137:             DO 10 I = 1, MIN( J, M )
                    138:                B( I, J ) = A( I, J )
                    139:    10       CONTINUE
                    140:    20    CONTINUE
                    141: *
                    142:       ELSE IF( LSAME( UPLO, 'L' ) ) THEN
                    143:          DO 40 J = 1, N
                    144:             DO 30 I = J, M
                    145:                B( I, J ) = A( I, J )
                    146:    30       CONTINUE
                    147:    40    CONTINUE
                    148: *
                    149:       ELSE
                    150:          DO 60 J = 1, N
                    151:             DO 50 I = 1, M
                    152:                B( I, J ) = A( I, J )
                    153:    50       CONTINUE
                    154:    60    CONTINUE
                    155:       END IF
                    156: *
                    157:       RETURN
                    158: *
                    159: *     End of ZLACP2
                    160: *
                    161:       END