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version 1.4, 2010/12/21 13:53:34 version 1.14, 2017/06/17 11:06:27
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   *> \brief \b DLAT2S converts a double-precision triangular matrix to a single-precision triangular matrix.
   *
   *  =========== DOCUMENTATION ===========
   *
   * Online html documentation available at
   *            http://www.netlib.org/lapack/explore-html/
   *
   *> \htmlonly
   *> Download DLAT2S + dependencies
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dlat2s.f">
   *> [TGZ]</a>
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dlat2s.f">
   *> [ZIP]</a>
   *> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dlat2s.f">
   *> [TXT]</a>
   *> \endhtmlonly
   *
   *  Definition:
   *  ===========
   *
   *       SUBROUTINE DLAT2S( UPLO, N, A, LDA, SA, LDSA, INFO )
   *
   *       .. Scalar Arguments ..
   *       CHARACTER          UPLO
   *       INTEGER            INFO, LDA, LDSA, N
   *       ..
   *       .. Array Arguments ..
   *       REAL               SA( LDSA, * )
   *       DOUBLE PRECISION   A( LDA, * )
   *       ..
   *
   *
   *> \par Purpose:
   *  =============
   *>
   *> \verbatim
   *>
   *> DLAT2S converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE
   *> PRECISION triangular matrix, A.
   *>
   *> RMAX is the overflow for the SINGLE PRECISION arithmetic
   *> DLAS2S checks that all the entries of A are between -RMAX and
   *> RMAX. If not the conversion is aborted and a flag is raised.
   *>
   *> This is an auxiliary routine so there is no argument checking.
   *> \endverbatim
   *
   *  Arguments:
   *  ==========
   *
   *> \param[in] UPLO
   *> \verbatim
   *>          UPLO is CHARACTER*1
   *>          = 'U':  A is upper triangular;
   *>          = 'L':  A is lower triangular.
   *> \endverbatim
   *>
   *> \param[in] N
   *> \verbatim
   *>          N is INTEGER
   *>          The number of rows and columns of the matrix A.  N >= 0.
   *> \endverbatim
   *>
   *> \param[in] A
   *> \verbatim
   *>          A is DOUBLE PRECISION array, dimension (LDA,N)
   *>          On entry, the N-by-N triangular coefficient matrix A.
   *> \endverbatim
   *>
   *> \param[in] LDA
   *> \verbatim
   *>          LDA is INTEGER
   *>          The leading dimension of the array A.  LDA >= max(1,N).
   *> \endverbatim
   *>
   *> \param[out] SA
   *> \verbatim
   *>          SA is REAL array, dimension (LDSA,N)
   *>          Only the UPLO part of SA is referenced.  On exit, if INFO=0,
   *>          the N-by-N coefficient matrix SA; if INFO>0, the content of
   *>          the UPLO part of SA is unspecified.
   *> \endverbatim
   *>
   *> \param[in] LDSA
   *> \verbatim
   *>          LDSA is INTEGER
   *>          The leading dimension of the array SA.  LDSA >= max(1,M).
   *> \endverbatim
   *>
   *> \param[out] INFO
   *> \verbatim
   *>          INFO is INTEGER
   *>          = 0:  successful exit.
   *>          = 1:  an entry of the matrix A is greater than the SINGLE
   *>                PRECISION overflow threshold, in this case, the content
   *>                of the UPLO part of SA in exit is unspecified.
   *> \endverbatim
   *
   *  Authors:
   *  ========
   *
   *> \author Univ. of Tennessee
   *> \author Univ. of California Berkeley
   *> \author Univ. of Colorado Denver
   *> \author NAG Ltd.
   *
   *> \date December 2016
   *
   *> \ingroup doubleOTHERauxiliary
   *
   *  =====================================================================
       SUBROUTINE DLAT2S( UPLO, N, A, LDA, SA, LDSA, INFO )        SUBROUTINE DLAT2S( UPLO, N, A, LDA, SA, LDSA, INFO )
 *  *
 *  -- LAPACK PROTOTYPE auxiliary routine (version 3.1.2) --  *  -- LAPACK auxiliary routine (version 3.7.0) --
 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --  *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--  *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
 *     May 2007  *     December 2016
 *  *
 *     .. Scalar Arguments ..  *     .. Scalar Arguments ..
       CHARACTER          UPLO        CHARACTER          UPLO
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       DOUBLE PRECISION   A( LDA, * )        DOUBLE PRECISION   A( LDA, * )
 *     ..  *     ..
 *  *
 *  Purpose  *  =====================================================================
 *  =======  
 *  
 *  DLAT2S converts a DOUBLE PRECISION triangular matrix, SA, to a SINGLE  
 *  PRECISION triangular matrix, A.  
 *  
 *  RMAX is the overflow for the SINGLE PRECISION arithmetic  
 *  DLAS2S checks that all the entries of A are between -RMAX and  
 *  RMAX. If not the convertion is aborted and a flag is raised.  
 *  
 *  This is an auxiliary routine so there is no argument checking.  
 *  
 *  Arguments  
 *  =========  
 *  
 *  UPLO    (input) CHARACTER*1  
 *          = 'U':  A is upper triangular;  
 *          = 'L':  A is lower triangular.  
 *  
 *  N       (input) INTEGER  
 *          The number of rows and columns of the matrix A.  N >= 0.  
 *  
 *  A       (input) DOUBLE PRECISION array, dimension (LDA,N)  
 *          On entry, the N-by-N triangular coefficient matrix A.  
 *  
 *  LDA     (input) INTEGER  
 *          The leading dimension of the array A.  LDA >= max(1,N).  
 *  
 *  SA      (output) REAL array, dimension (LDSA,N)  
 *          Only the UPLO part of SA is referenced.  On exit, if INFO=0,  
 *          the N-by-N coefficient matrix SA; if INFO>0, the content of  
 *          the UPLO part of SA is unspecified.  
 *  
 *  LDSA    (input) INTEGER  
 *          The leading dimension of the array SA.  LDSA >= max(1,M).  
 *  
 *  INFO    (output) INTEGER  
 *          = 0:  successful exit.  
 *          = 1:  an entry of the matrix A is greater than the SINGLE  
 *                PRECISION overflow threshold, in this case, the content  
 *                of the UPLO part of SA in exit is unspecified.  
 *  
 *  =========  
 *  *
 *     .. Local Scalars ..  *     .. Local Scalars ..
       INTEGER            I, J        INTEGER            I, J
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          DO 20 J = 1, N           DO 20 J = 1, N
             DO 10 I = 1, J              DO 10 I = 1, J
                IF( ( A( I, J ).LT.-RMAX ) .OR. ( A( I, J ).GT.RMAX ) )                 IF( ( A( I, J ).LT.-RMAX ) .OR. ( A( I, J ).GT.RMAX ) )
      +             THEN       $             THEN
                   INFO = 1                    INFO = 1
                   GO TO 50                    GO TO 50
                END IF                 END IF
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          DO 40 J = 1, N           DO 40 J = 1, N
             DO 30 I = J, N              DO 30 I = J, N
                IF( ( A( I, J ).LT.-RMAX ) .OR. ( A( I, J ).GT.RMAX ) )                 IF( ( A( I, J ).LT.-RMAX ) .OR. ( A( I, J ).GT.RMAX ) )
      +             THEN       $             THEN
                   INFO = 1                    INFO = 1
                   GO TO 50                    GO TO 50
                END IF                 END IF
Removed from v.1.4  
changed lines
  Added in v.1.14

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