version 1.9, 2011/11/21 20:43:19
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version 1.15, 2016/08/27 15:35:04
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*> \author Univ. of Colorado Denver |
*> \author Univ. of Colorado Denver |
*> \author NAG Ltd. |
*> \author NAG Ltd. |
* |
* |
*> \date November 2011 |
*> \date November 2015 |
* |
* |
*> \ingroup complex16POcomputational |
*> \ingroup complex16POcomputational |
* |
* |
* ===================================================================== |
* ===================================================================== |
SUBROUTINE ZPOTRF( UPLO, N, A, LDA, INFO ) |
SUBROUTINE ZPOTRF( UPLO, N, A, LDA, INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.0) -- |
* -- LAPACK computational routine (version 3.6.0) -- |
* -- 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 |
* November 2015 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER UPLO |
CHARACTER UPLO |
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EXTERNAL LSAME, ILAENV |
EXTERNAL LSAME, ILAENV |
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL XERBLA, ZGEMM, ZHERK, ZPOTF2, ZTRSM |
EXTERNAL XERBLA, ZGEMM, ZHERK, ZPOTRF2, ZTRSM |
* .. |
* .. |
* .. Intrinsic Functions .. |
* .. Intrinsic Functions .. |
INTRINSIC MAX, MIN |
INTRINSIC MAX, MIN |
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* |
* |
* Use unblocked code. |
* Use unblocked code. |
* |
* |
CALL ZPOTF2( UPLO, N, A, LDA, INFO ) |
CALL ZPOTRF2( 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 ZHERK( 'Upper', 'Conjugate transpose', JB, J-1, |
CALL ZHERK( 'Upper', 'Conjugate transpose', JB, J-1, |
$ -ONE, A( 1, J ), LDA, ONE, A( J, J ), LDA ) |
$ -ONE, A( 1, J ), LDA, ONE, A( J, J ), LDA ) |
CALL ZPOTF2( 'Upper', JB, A( J, J ), LDA, INFO ) |
CALL ZPOTRF2( '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 ZHERK( 'Lower', 'No transpose', JB, J-1, -ONE, |
CALL ZHERK( '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 ZPOTF2( 'Lower', JB, A( J, J ), LDA, INFO ) |
CALL ZPOTRF2( '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 |