version 1.9, 2011/11/21 20:43:02
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version 1.16, 2017/06/17 10:54:01
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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 DPOTRF + dependencies |
*> Download DPOTRF + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dpotrf.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dpotrf.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dpotrf.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dpotrf.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dpotrf.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dpotrf.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE DPOTRF( UPLO, N, A, LDA, INFO ) |
* SUBROUTINE DPOTRF( UPLO, N, A, LDA, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER UPLO |
* CHARACTER UPLO |
* INTEGER INFO, LDA, N |
* INTEGER INFO, LDA, N |
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* .. Array Arguments .. |
* .. Array Arguments .. |
* DOUBLE PRECISION A( LDA, * ) |
* DOUBLE PRECISION A( LDA, * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \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. |
* |
* |
*> \date November 2011 |
*> \date December 2016 |
* |
* |
*> \ingroup doublePOcomputational |
*> \ingroup doublePOcomputational |
* |
* |
* ===================================================================== |
* ===================================================================== |
SUBROUTINE DPOTRF( UPLO, N, A, LDA, INFO ) |
SUBROUTINE DPOTRF( UPLO, N, A, LDA, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational 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..-- |
* November 2011 |
* December 2016 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER UPLO |
CHARACTER UPLO |
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EXTERNAL LSAME, ILAENV |
EXTERNAL LSAME, ILAENV |
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL DGEMM, DPOTF2, DSYRK, DTRSM, XERBLA |
EXTERNAL DGEMM, DPOTRF2, DSYRK, DTRSM, XERBLA |
* .. |
* .. |
* .. Intrinsic Functions .. |
* .. Intrinsic Functions .. |
INTRINSIC MAX, MIN |
INTRINSIC MAX, MIN |
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* |
* |
* Use unblocked code. |
* Use unblocked code. |
* |
* |
CALL DPOTF2( UPLO, N, A, LDA, INFO ) |
CALL DPOTRF2( UPLO, N, A, LDA, INFO ) |
ELSE |
ELSE |
* |
* |
* Use blocked code. |
* Use blocked code. |
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JB = MIN( NB, N-J+1 ) |
JB = MIN( NB, N-J+1 ) |
CALL DSYRK( 'Upper', 'Transpose', JB, J-1, -ONE, |
CALL DSYRK( 'Upper', 'Transpose', JB, J-1, -ONE, |
$ A( 1, J ), LDA, ONE, A( J, J ), LDA ) |
$ A( 1, J ), LDA, ONE, A( J, J ), LDA ) |
CALL DPOTF2( 'Upper', JB, A( J, J ), LDA, INFO ) |
CALL DPOTRF2( 'Upper', JB, A( J, J ), LDA, INFO ) |
IF( INFO.NE.0 ) |
IF( INFO.NE.0 ) |
$ GO TO 30 |
$ GO TO 30 |
IF( J+JB.LE.N ) THEN |
IF( J+JB.LE.N ) THEN |
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JB = MIN( NB, N-J+1 ) |
JB = MIN( NB, N-J+1 ) |
CALL DSYRK( 'Lower', 'No transpose', JB, J-1, -ONE, |
CALL DSYRK( 'Lower', 'No transpose', JB, J-1, -ONE, |
$ A( J, 1 ), LDA, ONE, A( J, J ), LDA ) |
$ A( J, 1 ), LDA, ONE, A( J, J ), LDA ) |
CALL DPOTF2( 'Lower', JB, A( J, J ), LDA, INFO ) |
CALL DPOTRF2( 'Lower', JB, A( J, J ), LDA, INFO ) |
IF( INFO.NE.0 ) |
IF( INFO.NE.0 ) |
$ GO TO 30 |
$ GO TO 30 |
IF( J+JB.LE.N ) THEN |
IF( J+JB.LE.N ) THEN |