slag2d.f

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*> \brief \b SLAG2D converts a single precision matrix to a double precision matrix.
*
*  =========== DOCUMENTATION ===========
*
* Online html documentation available at 
*            http://www.netlib.org/lapack/explore-html/ 
*
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*> \endhtmlonly 
*
*  Definition:
*  ===========
*
*       SUBROUTINE SLAG2D( M, N, SA, LDSA, A, LDA, INFO )
* 
*       .. Scalar Arguments ..
*       INTEGER            INFO, LDA, LDSA, M, N
*       ..
*       .. Array Arguments ..
*       REAL               SA( LDSA, * )
*       DOUBLE PRECISION   A( LDA, * )
*       ..
*  
*
*> \par Purpose:
*  =============
*>
*> \verbatim
*>
*> SLAG2D converts a SINGLE PRECISION matrix, SA, to a DOUBLE
*> PRECISION matrix, A.
*>
*> Note that while it is possible to overflow while converting
*> from double to single, it is not possible to overflow when
*> converting from single to double.
*>
*> This is an auxiliary routine so there is no argument checking.
*> \endverbatim
*
*  Arguments:
*  ==========
*
*> \param[in] M
*> \verbatim
*>          M is INTEGER
*>          The number of lines of the matrix A.  M >= 0.
*> \endverbatim
*>
*> \param[in] N
*> \verbatim
*>          N is INTEGER
*>          The number of columns of the matrix A.  N >= 0.
*> \endverbatim
*>
*> \param[in] SA
*> \verbatim
*>          SA is REAL array, dimension (LDSA,N)
*>          On entry, the M-by-N coefficient matrix SA.
*> \endverbatim
*>
*> \param[in] LDSA
*> \verbatim
*>          LDSA is INTEGER
*>          The leading dimension of the array SA.  LDSA >= max(1,M).
*> \endverbatim
*>
*> \param[out] A
*> \verbatim
*>          A is DOUBLE PRECISION array, dimension (LDA,N)
*>          On exit, the M-by-N coefficient matrix A.
*> \endverbatim
*>
*> \param[in] LDA
*> \verbatim
*>          LDA is INTEGER
*>          The leading dimension of the array A.  LDA >= max(1,M).
*> \endverbatim
*>
*> \param[out] INFO
*> \verbatim
*>          INFO is INTEGER
*>          = 0:  successful exit
*> \endverbatim
*
*  Authors:
*  ========
*
*> \author Univ. of Tennessee 
*> \author Univ. of California Berkeley 
*> \author Univ. of Colorado Denver 
*> \author NAG Ltd. 
*
*> \date September 2012
*
*> \ingroup auxOTHERauxiliary
*
*  =====================================================================
      SUBROUTINE slag2d( M, N, SA, LDSA, A, LDA, INFO )
*
*  -- LAPACK auxiliary routine (version 3.4.2) --
*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*     September 2012
*
*     .. Scalar Arguments ..
      INTEGER            INFO, LDA, LDSA, M, N
*     ..
*     .. Array Arguments ..
      REAL               SA( ldsa, * )
      DOUBLE PRECISION   A( lda, * )
*     ..
*
*  =====================================================================
*
*     .. Local Scalars ..
      INTEGER            I, J
*     ..
*     .. Executable Statements ..
*
      info = 0
      DO 20 j = 1, n
         DO 10 i = 1, m
            a( i, j ) = sa( i, j )
   10    CONTINUE
   20 CONTINUE
      RETURN
*
*     End of SLAG2D
*
      END