*> \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/ * *> \htmlonly *> Download SLAG2D + dependencies *> *> [TGZ] *> *> [ZIP] *> *> [TXT] *> \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. * *> \ingroup OTHERauxiliary * * ===================================================================== SUBROUTINE SLAG2D( M, N, SA, LDSA, A, LDA, INFO ) * * -- LAPACK auxiliary routine -- * -- LAPACK is a software package provided by Univ. of Tennessee, -- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- * * .. 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