version 1.14, 2014/01/27 09:28:16
|
version 1.18, 2017/06/17 11:06:15
|
Line 2
|
Line 2
|
* |
* |
* =========== 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 DGEEV + dependencies |
*> Download DGEEV + dependencies |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dgeev.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.tgz?format=tgz&filename=/lapack/lapack_routine/dgeev.f"> |
*> [TGZ]</a> |
*> [TGZ]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dgeev.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.zip?format=zip&filename=/lapack/lapack_routine/dgeev.f"> |
*> [ZIP]</a> |
*> [ZIP]</a> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dgeev.f"> |
*> <a href="http://www.netlib.org/cgi-bin/netlibfiles.txt?format=txt&filename=/lapack/lapack_routine/dgeev.f"> |
*> [TXT]</a> |
*> [TXT]</a> |
*> \endhtmlonly |
*> \endhtmlonly |
* |
* |
* Definition: |
* Definition: |
* =========== |
* =========== |
* |
* |
* SUBROUTINE DGEEV( JOBVL, JOBVR, N, A, LDA, WR, WI, VL, LDVL, VR, |
* SUBROUTINE DGEEV( JOBVL, JOBVR, N, A, LDA, WR, WI, VL, LDVL, VR, |
* LDVR, WORK, LWORK, INFO ) |
* LDVR, WORK, LWORK, INFO ) |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
* CHARACTER JOBVL, JOBVR |
* CHARACTER JOBVL, JOBVR |
* INTEGER INFO, LDA, LDVL, LDVR, LWORK, N |
* INTEGER INFO, LDA, LDVL, LDVR, LWORK, N |
Line 29
|
Line 29
|
* DOUBLE PRECISION A( LDA, * ), VL( LDVL, * ), VR( LDVR, * ), |
* DOUBLE PRECISION A( LDA, * ), VL( LDVL, * ), VR( LDVR, * ), |
* $ WI( * ), WORK( * ), WR( * ) |
* $ WI( * ), WORK( * ), WR( * ) |
* .. |
* .. |
* |
* |
* |
* |
*> \par Purpose: |
*> \par Purpose: |
* ============= |
* ============= |
Line 176
|
Line 176
|
* 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 June 2016 |
* |
* |
*> \date September 2012 |
* @precisions fortran d -> s |
* |
* |
*> \ingroup doubleGEeigen |
*> \ingroup doubleGEeigen |
* |
* |
* ===================================================================== |
* ===================================================================== |
SUBROUTINE DGEEV( JOBVL, JOBVR, N, A, LDA, WR, WI, VL, LDVL, VR, |
SUBROUTINE DGEEV( JOBVL, JOBVR, N, A, LDA, WR, WI, VL, LDVL, VR, |
$ LDVR, WORK, LWORK, INFO ) |
$ LDVR, WORK, LWORK, INFO ) |
|
implicit none |
* |
* |
* -- LAPACK driver routine (version 3.4.2) -- |
* -- LAPACK driver 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..-- |
* September 2012 |
* June 2016 |
* |
* |
* .. Scalar Arguments .. |
* .. Scalar Arguments .. |
CHARACTER JOBVL, JOBVR |
CHARACTER JOBVL, JOBVR |
Line 213
|
Line 216
|
LOGICAL LQUERY, SCALEA, WANTVL, WANTVR |
LOGICAL LQUERY, SCALEA, WANTVL, WANTVR |
CHARACTER SIDE |
CHARACTER SIDE |
INTEGER HSWORK, I, IBAL, IERR, IHI, ILO, ITAU, IWRK, K, |
INTEGER HSWORK, I, IBAL, IERR, IHI, ILO, ITAU, IWRK, K, |
$ MAXWRK, MINWRK, NOUT |
$ LWORK_TREVC, MAXWRK, MINWRK, NOUT |
DOUBLE PRECISION ANRM, BIGNUM, CS, CSCALE, EPS, R, SCL, SMLNUM, |
DOUBLE PRECISION ANRM, BIGNUM, CS, CSCALE, EPS, R, SCL, SMLNUM, |
$ SN |
$ SN |
* .. |
* .. |
Line 223
|
Line 226
|
* .. |
* .. |
* .. External Subroutines .. |
* .. External Subroutines .. |
EXTERNAL DGEBAK, DGEBAL, DGEHRD, DHSEQR, DLABAD, DLACPY, |
EXTERNAL DGEBAK, DGEBAL, DGEHRD, DHSEQR, DLABAD, DLACPY, |
$ DLARTG, DLASCL, DORGHR, DROT, DSCAL, DTREVC, |
$ DLARTG, DLASCL, DORGHR, DROT, DSCAL, DTREVC3, |
$ XERBLA |
$ XERBLA |
* .. |
* .. |
* .. External Functions .. |
* .. External Functions .. |
Line 279
|
Line 282
|
MAXWRK = MAX( MAXWRK, 2*N + ( N - 1 )*ILAENV( 1, |
MAXWRK = MAX( MAXWRK, 2*N + ( N - 1 )*ILAENV( 1, |
$ 'DORGHR', ' ', N, 1, N, -1 ) ) |
$ 'DORGHR', ' ', N, 1, N, -1 ) ) |
CALL DHSEQR( 'S', 'V', N, 1, N, A, LDA, WR, WI, VL, LDVL, |
CALL DHSEQR( 'S', 'V', N, 1, N, A, LDA, WR, WI, VL, LDVL, |
$ WORK, -1, INFO ) |
$ WORK, -1, INFO ) |
HSWORK = WORK( 1 ) |
HSWORK = INT( WORK(1) ) |
MAXWRK = MAX( MAXWRK, N + 1, N + HSWORK ) |
MAXWRK = MAX( MAXWRK, N + 1, N + HSWORK ) |
|
CALL DTREVC3( 'L', 'B', SELECT, N, A, LDA, |
|
$ VL, LDVL, VR, LDVR, N, NOUT, |
|
$ WORK, -1, IERR ) |
|
LWORK_TREVC = INT( WORK(1) ) |
|
MAXWRK = MAX( MAXWRK, N + LWORK_TREVC ) |
MAXWRK = MAX( MAXWRK, 4*N ) |
MAXWRK = MAX( MAXWRK, 4*N ) |
ELSE IF( WANTVR ) THEN |
ELSE IF( WANTVR ) THEN |
MINWRK = 4*N |
MINWRK = 4*N |
MAXWRK = MAX( MAXWRK, 2*N + ( N - 1 )*ILAENV( 1, |
MAXWRK = MAX( MAXWRK, 2*N + ( N - 1 )*ILAENV( 1, |
$ 'DORGHR', ' ', N, 1, N, -1 ) ) |
$ 'DORGHR', ' ', N, 1, N, -1 ) ) |
CALL DHSEQR( 'S', 'V', N, 1, N, A, LDA, WR, WI, VR, LDVR, |
CALL DHSEQR( 'S', 'V', N, 1, N, A, LDA, WR, WI, VR, LDVR, |
$ WORK, -1, INFO ) |
$ WORK, -1, INFO ) |
HSWORK = WORK( 1 ) |
HSWORK = INT( WORK(1) ) |
MAXWRK = MAX( MAXWRK, N + 1, N + HSWORK ) |
MAXWRK = MAX( MAXWRK, N + 1, N + HSWORK ) |
|
CALL DTREVC3( 'R', 'B', SELECT, N, A, LDA, |
|
$ VL, LDVL, VR, LDVR, N, NOUT, |
|
$ WORK, -1, IERR ) |
|
LWORK_TREVC = INT( WORK(1) ) |
|
MAXWRK = MAX( MAXWRK, N + LWORK_TREVC ) |
MAXWRK = MAX( MAXWRK, 4*N ) |
MAXWRK = MAX( MAXWRK, 4*N ) |
ELSE |
ELSE |
MINWRK = 3*N |
MINWRK = 3*N |
CALL DHSEQR( 'E', 'N', N, 1, N, A, LDA, WR, WI, VR, LDVR, |
CALL DHSEQR( 'E', 'N', N, 1, N, A, LDA, WR, WI, VR, LDVR, |
$ WORK, -1, INFO ) |
$ WORK, -1, INFO ) |
HSWORK = WORK( 1 ) |
HSWORK = INT( WORK(1) ) |
MAXWRK = MAX( MAXWRK, N + 1, N + HSWORK ) |
MAXWRK = MAX( MAXWRK, N + 1, N + HSWORK ) |
END IF |
END IF |
MAXWRK = MAX( MAXWRK, MINWRK ) |
MAXWRK = MAX( MAXWRK, MINWRK ) |
Line 418
|
Line 431
|
$ WORK( IWRK ), LWORK-IWRK+1, INFO ) |
$ WORK( IWRK ), LWORK-IWRK+1, INFO ) |
END IF |
END IF |
* |
* |
* If INFO > 0 from DHSEQR, then quit |
* If INFO .NE. 0 from DHSEQR, then quit |
* |
* |
IF( INFO.GT.0 ) |
IF( INFO.NE.0 ) |
$ GO TO 50 |
$ GO TO 50 |
* |
* |
IF( WANTVL .OR. WANTVR ) THEN |
IF( WANTVL .OR. WANTVR ) THEN |
* |
* |
* Compute left and/or right eigenvectors |
* Compute left and/or right eigenvectors |
* (Workspace: need 4*N) |
* (Workspace: need 4*N, prefer N + N + 2*N*NB) |
* |
* |
CALL DTREVC( SIDE, 'B', SELECT, N, A, LDA, VL, LDVL, VR, LDVR, |
CALL DTREVC3( SIDE, 'B', SELECT, N, A, LDA, VL, LDVL, VR, LDVR, |
$ N, NOUT, WORK( IWRK ), IERR ) |
$ N, NOUT, WORK( IWRK ), LWORK-IWRK+1, IERR ) |
END IF |
END IF |
* |
* |
IF( WANTVL ) THEN |
IF( WANTVL ) THEN |