version 1.13, 2012/12/14 14:22:45
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version 1.20, 2023/08/07 08:39:18
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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 ZGEQP3 + dependencies |
*> Download ZGEQP3 + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zgeqp3.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/zgeqp3.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zgeqp3.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/zgeqp3.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zgeqp3.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/zgeqp3.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE ZGEQP3( M, N, A, LDA, JPVT, TAU, WORK, LWORK, RWORK, |
* SUBROUTINE ZGEQP3( M, N, A, LDA, JPVT, TAU, WORK, LWORK, RWORK, |
* INFO ) |
* INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* INTEGER INFO, LDA, LWORK, M, N |
* INTEGER INFO, LDA, LWORK, M, N |
* .. |
* .. |
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* DOUBLE PRECISION RWORK( * ) |
* DOUBLE PRECISION RWORK( * ) |
* COMPLEX*16 A( LDA, * ), TAU( * ), WORK( * ) |
* COMPLEX*16 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 September 2012 |
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* |
* |
*> \ingroup complex16GEcomputational |
*> \ingroup complex16GEcomputational |
* |
* |
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SUBROUTINE ZGEQP3( M, N, A, LDA, JPVT, TAU, WORK, LWORK, RWORK, |
SUBROUTINE ZGEQP3( M, N, A, LDA, JPVT, TAU, WORK, LWORK, RWORK, |
$ INFO ) |
$ INFO ) |
* |
* |
* -- LAPACK computational routine (version 3.4.2) -- |
* -- 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..-- |
* September 2012 |
|
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
INTEGER INFO, LDA, LWORK, M, N |
INTEGER INFO, LDA, LWORK, M, N |
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NB = ILAENV( INB, 'ZGEQRF', ' ', M, N, -1, -1 ) |
NB = ILAENV( INB, 'ZGEQRF', ' ', M, N, -1, -1 ) |
LWKOPT = ( N + 1 )*NB |
LWKOPT = ( N + 1 )*NB |
END IF |
END IF |
WORK( 1 ) = LWKOPT |
WORK( 1 ) = DCMPLX( LWKOPT ) |
* |
* |
IF( ( LWORK.LT.IWS ) .AND. .NOT.LQUERY ) THEN |
IF( ( LWORK.LT.IWS ) .AND. .NOT.LQUERY ) THEN |
INFO = -8 |
INFO = -8 |
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RETURN |
RETURN |
END IF |
END IF |
* |
* |
* Quick return if possible. |
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* |
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IF( MINMN.EQ.0 ) THEN |
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RETURN |
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END IF |
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* |
|
* Move initial columns up front. |
* Move initial columns up front. |
* |
* |
NFXD = 1 |
NFXD = 1 |
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* |
* |
END IF |
END IF |
* |
* |
WORK( 1 ) = IWS |
WORK( 1 ) = DCMPLX( LWKOPT ) |
RETURN |
RETURN |
* |
* |
* End of ZGEQP3 |
* End of ZGEQP3 |