version 1.9, 2012/12/14 14:22:28
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version 1.17, 2023/08/07 08:38:47
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* |
* |
* =========== DOCUMENTATION =========== |
* =========== DOCUMENTATION =========== |
* |
* |
* Online html documentation available at |
* Online html documentation available at |
* http://www.netlib.org/lapack/explore-html/ |
* http://www.netlib.org/lapack/explore-html/ |
* |
* |
*> \htmlonly |
*> \htmlonly |
*> Download DGBRFSX + dependencies |
*> Download DGBRFSX + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dgbrfsx.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dgbrfsx.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dgbrfsx.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dgbrfsx.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dgbrfsx.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dgbrfsx.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
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* BERR, N_ERR_BNDS, ERR_BNDS_NORM, |
* BERR, N_ERR_BNDS, ERR_BNDS_NORM, |
* ERR_BNDS_COMP, NPARAMS, PARAMS, WORK, IWORK, |
* ERR_BNDS_COMP, NPARAMS, PARAMS, WORK, IWORK, |
* INFO ) |
* INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER TRANS, EQUED |
* CHARACTER TRANS, EQUED |
* INTEGER INFO, LDAB, LDAFB, LDB, LDX, N, KL, KU, NRHS, |
* INTEGER INFO, LDAB, LDAFB, LDB, LDX, N, KL, KU, NRHS, |
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* $ ERR_BNDS_NORM( NRHS, * ), |
* $ ERR_BNDS_NORM( NRHS, * ), |
* $ ERR_BNDS_COMP( NRHS, * ) |
* $ ERR_BNDS_COMP( NRHS, * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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*> information as described below. There currently are up to three |
*> information as described below. There currently are up to three |
*> pieces of information returned for each right-hand side. If |
*> pieces of information returned for each right-hand side. If |
*> componentwise accuracy is not requested (PARAMS(3) = 0.0), then |
*> componentwise accuracy is not requested (PARAMS(3) = 0.0), then |
*> ERR_BNDS_COMP is not accessed. If N_ERR_BNDS .LT. 3, then at most |
*> ERR_BNDS_COMP is not accessed. If N_ERR_BNDS < 3, then at most |
*> the first (:,N_ERR_BNDS) entries are returned. |
*> the first (:,N_ERR_BNDS) entries are returned. |
*> |
*> |
*> The first index in ERR_BNDS_COMP(i,:) corresponds to the ith |
*> The first index in ERR_BNDS_COMP(i,:) corresponds to the ith |
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*> \param[in] NPARAMS |
*> \param[in] NPARAMS |
*> \verbatim |
*> \verbatim |
*> NPARAMS is INTEGER |
*> NPARAMS is INTEGER |
*> Specifies the number of parameters set in PARAMS. If .LE. 0, the |
*> Specifies the number of parameters set in PARAMS. If <= 0, the |
*> PARAMS array is never referenced and default values are used. |
*> PARAMS array is never referenced and default values are used. |
*> \endverbatim |
*> \endverbatim |
*> |
*> |
*> \param[in,out] PARAMS |
*> \param[in,out] PARAMS |
*> \verbatim |
*> \verbatim |
*> PARAMS is DOUBLE PRECISION array, dimension (NPARAMS) |
*> PARAMS is DOUBLE PRECISION array, dimension (NPARAMS) |
*> Specifies algorithm parameters. If an entry is .LT. 0.0, then |
*> Specifies algorithm parameters. If an entry is < 0.0, then |
*> that entry will be filled with default value used for that |
*> that entry will be filled with default value used for that |
*> parameter. Only positions up to NPARAMS are accessed; defaults |
*> parameter. Only positions up to NPARAMS are accessed; defaults |
*> are used for higher-numbered parameters. |
*> are used for higher-numbered parameters. |
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*> PARAMS(LA_LINRX_ITREF_I = 1) : Whether to perform iterative |
*> PARAMS(LA_LINRX_ITREF_I = 1) : Whether to perform iterative |
*> refinement or not. |
*> refinement or not. |
*> Default: 1.0D+0 |
*> Default: 1.0D+0 |
*> = 0.0 : No refinement is performed, and no error bounds are |
*> = 0.0: No refinement is performed, and no error bounds are |
*> computed. |
*> computed. |
*> = 1.0 : Use the double-precision refinement algorithm, |
*> = 1.0: Use the double-precision refinement algorithm, |
*> possibly with doubled-single computations if the |
*> possibly with doubled-single computations if the |
*> compilation environment does not support DOUBLE |
*> compilation environment does not support DOUBLE |
*> PRECISION. |
*> PRECISION. |
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* Authors: |
* Authors: |
* ======== |
* ======== |
* |
* |
*> \author Univ. of Tennessee |
*> \author Univ. of Tennessee |
*> \author Univ. of California Berkeley |
*> \author Univ. of California Berkeley |
*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
|
*> \date April 2012 |
|
* |
* |
*> \ingroup doubleGBcomputational |
*> \ingroup doubleGBcomputational |
* |
* |
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$ ERR_BNDS_COMP, NPARAMS, PARAMS, WORK, IWORK, |
$ ERR_BNDS_COMP, NPARAMS, PARAMS, WORK, IWORK, |
$ INFO ) |
$ INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.1) -- |
* -- LAPACK computational routine -- |
* -- 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..-- |
* April 2012 |
|
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER TRANS, EQUED |
CHARACTER TRANS, EQUED |
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INTRINSIC MAX, SQRT |
INTRINSIC MAX, SQRT |
* .. |
* .. |
* .. External Functions .. |
* .. External Functions .. |
EXTERNAL LSAME, BLAS_FPINFO_X, ILATRANS, ILAPREC |
EXTERNAL LSAME, ILATRANS, ILAPREC |
EXTERNAL DLAMCH, DLANGB, DLA_GBRCOND |
EXTERNAL DLAMCH, DLANGB, DLA_GBRCOND |
DOUBLE PRECISION DLAMCH, DLANGB, DLA_GBRCOND |
DOUBLE PRECISION DLAMCH, DLANGB, DLA_GBRCOND |
LOGICAL LSAME |
LOGICAL LSAME |
INTEGER BLAS_FPINFO_X |
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INTEGER ILATRANS, ILAPREC |
INTEGER ILATRANS, ILAPREC |
* .. |
* .. |
* .. Executable Statements .. |
* .. Executable Statements .. |
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* |
* |
* Perform refinement on each right-hand side |
* Perform refinement on each right-hand side |
* |
* |
IF (REF_TYPE .NE. 0) THEN |
IF ( REF_TYPE .NE. 0 .AND. INFO .EQ. 0 ) THEN |
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PREC_TYPE = ILAPREC( 'E' ) |
PREC_TYPE = ILAPREC( 'E' ) |
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