version 1.10, 2011/11/21 22:19:36
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version 1.19, 2023/08/07 08:39:02
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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 DORGBR + dependencies |
*> Download DORGBR + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dorgbr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dorgbr.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dorgbr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dorgbr.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dorgbr.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dorgbr.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE DORGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
* SUBROUTINE DORGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER VECT |
* CHARACTER VECT |
* INTEGER INFO, K, LDA, LWORK, M, N |
* INTEGER INFO, K, LDA, LWORK, M, N |
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* .. Array Arguments .. |
* .. Array Arguments .. |
* DOUBLE PRECISION A( LDA, * ), TAU( * ), WORK( * ) |
* DOUBLE PRECISION A( LDA, * ), TAU( * ), WORK( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
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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. |
* |
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*> \date November 2011 |
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* |
* |
*> \ingroup doubleGBcomputational |
*> \ingroup doubleGBcomputational |
* |
* |
* ===================================================================== |
* ===================================================================== |
SUBROUTINE DORGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
SUBROUTINE DORGBR( VECT, M, N, K, A, LDA, TAU, WORK, LWORK, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- 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..-- |
* November 2011 |
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* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER VECT |
CHARACTER VECT |
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* .. |
* .. |
* .. Local Scalars .. |
* .. Local Scalars .. |
LOGICAL LQUERY, WANTQ |
LOGICAL LQUERY, WANTQ |
INTEGER I, IINFO, J, LWKOPT, MN, NB |
INTEGER I, IINFO, J, LWKOPT, MN |
* .. |
* .. |
* .. External Functions .. |
* .. External Functions .. |
LOGICAL LSAME |
LOGICAL LSAME |
INTEGER ILAENV |
EXTERNAL LSAME |
EXTERNAL LSAME, ILAENV |
|
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL DORGLQ, DORGQR, XERBLA |
EXTERNAL DORGLQ, DORGQR, XERBLA |
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CALL DORGQR( M, N, K, A, LDA, TAU, WORK, -1, IINFO ) |
CALL DORGQR( M, N, K, A, LDA, TAU, WORK, -1, IINFO ) |
ELSE |
ELSE |
IF( M.GT.1 ) THEN |
IF( M.GT.1 ) THEN |
CALL DORGQR( M-1, M-1, M-1, A( 2, 2 ), LDA, TAU, WORK, |
CALL DORGQR( M-1, M-1, M-1, A, LDA, TAU, WORK, -1, |
$ -1, IINFO ) |
$ IINFO ) |
END IF |
END IF |
END IF |
END IF |
ELSE |
ELSE |
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CALL DORGLQ( M, N, K, A, LDA, TAU, WORK, -1, IINFO ) |
CALL DORGLQ( M, N, K, A, LDA, TAU, WORK, -1, IINFO ) |
ELSE |
ELSE |
IF( N.GT.1 ) THEN |
IF( N.GT.1 ) THEN |
CALL DORGLQ( N-1, N-1, N-1, A( 2, 2 ), LDA, TAU, WORK, |
CALL DORGLQ( N-1, N-1, N-1, A, LDA, TAU, WORK, -1, |
$ -1, IINFO ) |
$ IINFO ) |
END IF |
END IF |
END IF |
END IF |
END IF |
END IF |
LWKOPT = WORK( 1 ) |
LWKOPT = INT( WORK( 1 ) ) |
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LWKOPT = MAX (LWKOPT, MN) |
END IF |
END IF |
* |
* |
IF( INFO.NE.0 ) THEN |
IF( INFO.NE.0 ) THEN |
CALL XERBLA( 'DORGBR', -INFO ) |
CALL XERBLA( 'DORGBR', -INFO ) |
RETURN |
RETURN |
ELSE IF( LQUERY ) THEN |
ELSE IF( LQUERY ) THEN |
|
WORK( 1 ) = LWKOPT |
RETURN |
RETURN |
END IF |
END IF |
* |
* |