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197 lines
6.2 KiB
197 lines
6.2 KiB
2 years ago
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*> \brief \b CCHKEC
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*
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* =========== DOCUMENTATION ===========
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*
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* Online html documentation available at
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* http://www.netlib.org/lapack/explore-html/
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*
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* Definition:
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* ===========
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*
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* SUBROUTINE CCHKEC( THRESH, TSTERR, NIN, NOUT )
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*
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* .. Scalar Arguments ..
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* LOGICAL TSTERR
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* INTEGER NIN, NOUT
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* REAL THRESH
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* ..
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*
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*
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*> \par Purpose:
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* =============
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*>
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*> \verbatim
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*>
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*> CCHKEC tests eigen- condition estimation routines
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*> CTRSYL, CTRSYL3, CTREXC, CTRSNA, CTRSEN
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*>
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*> In all cases, the routine runs through a fixed set of numerical
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*> examples, subjects them to various tests, and compares the test
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*> results to a threshold THRESH. In addition, CTRSNA and CTRSEN are
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*> tested by reading in precomputed examples from a file (on input unit
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*> NIN). Output is written to output unit NOUT.
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*> \endverbatim
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*
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* Arguments:
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* ==========
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*
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*> \param[in] THRESH
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*> \verbatim
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*> THRESH is REAL
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*> Threshold for residual tests. A computed test ratio passes
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*> the threshold if it is less than THRESH.
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*> \endverbatim
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*>
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*> \param[in] TSTERR
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*> \verbatim
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*> TSTERR is LOGICAL
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*> Flag that indicates whether error exits are to be tested.
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*> \endverbatim
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*>
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*> \param[in] NIN
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*> \verbatim
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*> NIN is INTEGER
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*> The logical unit number for input.
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*> \endverbatim
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*>
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*> \param[in] NOUT
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*> \verbatim
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*> NOUT is INTEGER
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*> The logical unit number for output.
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*> \endverbatim
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*
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* Authors:
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* ========
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*
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*> \author Univ. of Tennessee
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*> \author Univ. of California Berkeley
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*> \author Univ. of Colorado Denver
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*> \author NAG Ltd.
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*
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*> \ingroup complex_eig
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*
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* =====================================================================
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SUBROUTINE CCHKEC( THRESH, TSTERR, NIN, NOUT )
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*
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* -- LAPACK test routine --
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* -- LAPACK is a software package provided by Univ. of Tennessee, --
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* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
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*
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* .. Scalar Arguments ..
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LOGICAL TSTERR
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INTEGER NIN, NOUT
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REAL THRESH
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* ..
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*
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* =====================================================================
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*
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* .. Local Scalars ..
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LOGICAL OK
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CHARACTER*3 PATH
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INTEGER KTREXC, KTRSEN, KTRSNA, KTRSYL, KTRSYL3,
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$ LTREXC, LTRSYL, NTESTS, NTREXC, NTRSYL
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REAL EPS, RTREXC, SFMIN
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* ..
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* .. Local Arrays ..
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INTEGER FTRSYL( 3 ), ITRSYL( 2 ), LTRSEN( 3 ),
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$ LTRSNA( 3 ), NTRSEN( 3 ), NTRSNA( 3 )
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REAL RTRSEN( 3 ), RTRSNA( 3 ), RTRSYL( 2 )
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* ..
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* .. External Subroutines ..
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EXTERNAL CERREC, CGET35, CGET36, CGET37, CGET38, CSYL01
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* ..
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* .. External Functions ..
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REAL SLAMCH
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EXTERNAL SLAMCH
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* ..
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* .. Executable Statements ..
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*
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PATH( 1: 1 ) = 'Complex precision'
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PATH( 2: 3 ) = 'EC'
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EPS = SLAMCH( 'P' )
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SFMIN = SLAMCH( 'S' )
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WRITE( NOUT, FMT = 9994 )
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WRITE( NOUT, FMT = 9993 )EPS, SFMIN
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WRITE( NOUT, FMT = 9992 )THRESH
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*
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* Test error exits if TSTERR is .TRUE.
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*
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IF( TSTERR )
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$ CALL CERREC( PATH, NOUT )
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*
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OK = .TRUE.
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CALL CGET35( RTRSYL( 1 ), LTRSYL, NTRSYL, KTRSYL, NIN )
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IF( RTRSYL( 1 ).GT.THRESH ) THEN
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OK = .FALSE.
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WRITE( NOUT, FMT = 9999 )RTRSYL( 1 ), LTRSYL, NTRSYL, KTRSYL
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END IF
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*
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CALL CSYL01( THRESH, FTRSYL, RTRSYL, ITRSYL, KTRSYL3 )
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IF( FTRSYL( 1 ).GT.0 ) THEN
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OK = .FALSE.
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WRITE( NOUT, FMT = 9970 )FTRSYL( 1 ), RTRSYL( 1 ), THRESH
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END IF
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IF( FTRSYL( 2 ).GT.0 ) THEN
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OK = .FALSE.
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WRITE( NOUT, FMT = 9971 )FTRSYL( 2 ), RTRSYL( 2 ), THRESH
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END IF
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IF( FTRSYL( 3 ).GT.0 ) THEN
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OK = .FALSE.
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WRITE( NOUT, FMT = 9972 )FTRSYL( 3 )
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END IF
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*
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CALL CGET36( RTREXC, LTREXC, NTREXC, KTREXC, NIN )
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IF( RTREXC.GT.THRESH .OR. NTREXC.GT.0 ) THEN
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OK = .FALSE.
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WRITE( NOUT, FMT = 9998 )RTREXC, LTREXC, NTREXC, KTREXC
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END IF
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*
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CALL CGET37( RTRSNA, LTRSNA, NTRSNA, KTRSNA, NIN )
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IF( RTRSNA( 1 ).GT.THRESH .OR. RTRSNA( 2 ).GT.THRESH .OR.
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$ NTRSNA( 1 ).NE.0 .OR. NTRSNA( 2 ).NE.0 .OR. NTRSNA( 3 ).NE.0 )
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$ THEN
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OK = .FALSE.
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WRITE( NOUT, FMT = 9997 )RTRSNA, LTRSNA, NTRSNA, KTRSNA
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END IF
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*
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CALL CGET38( RTRSEN, LTRSEN, NTRSEN, KTRSEN, NIN )
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IF( RTRSEN( 1 ).GT.THRESH .OR. RTRSEN( 2 ).GT.THRESH .OR.
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$ NTRSEN( 1 ).NE.0 .OR. NTRSEN( 2 ).NE.0 .OR. NTRSEN( 3 ).NE.0 )
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$ THEN
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OK = .FALSE.
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WRITE( NOUT, FMT = 9996 )RTRSEN, LTRSEN, NTRSEN, KTRSEN
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END IF
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*
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NTESTS = KTRSYL + KTREXC + KTRSNA + KTRSEN
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IF( OK )
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$ WRITE( NOUT, FMT = 9995 )PATH, NTESTS
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*
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9999 FORMAT( ' Error in CTRSYL: RMAX =', E12.3, / ' LMAX = ', I8,
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$ ' NINFO=', I8, ' KNT=', I8 )
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9998 FORMAT( ' Error in CTREXC: RMAX =', E12.3, / ' LMAX = ', I8,
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$ ' NINFO=', I8, ' KNT=', I8 )
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9997 FORMAT( ' Error in CTRSNA: RMAX =', 3E12.3, / ' LMAX = ',
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$ 3I8, ' NINFO=', 3I8, ' KNT=', I8 )
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9996 FORMAT( ' Error in CTRSEN: RMAX =', 3E12.3, / ' LMAX = ',
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$ 3I8, ' NINFO=', 3I8, ' KNT=', I8 )
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9995 FORMAT( / 1X, 'All tests for ', A3,
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$ ' routines passed the threshold ( ', I6, ' tests run)' )
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9994 FORMAT( ' Tests of the Nonsymmetric eigenproblem condition',
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$ ' estimation routines', / ' CTRSYL, CTREXC, CTRSNA, CTRSEN',
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$ / )
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9993 FORMAT( ' Relative machine precision (EPS) = ', E16.6,
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$ / ' Safe minimum (SFMIN) = ', E16.6, / )
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9992 FORMAT( ' Routines pass computational tests if test ratio is ',
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$ 'less than', F8.2, / / )
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9972 FORMAT( 'CTRSYL and CTRSYL3 compute an inconsistent scale ',
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$ 'factor in ', I8, ' tests.')
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9971 FORMAT( 'Error in CTRSYL3: ', I8, ' tests fail the threshold.', /
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$ 'Maximum test ratio =', D12.3, ' threshold =', D12.3 )
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9970 FORMAT( 'Error in CTRSYL: ', I8, ' tests fail the threshold.', /
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$ 'Maximum test ratio =', D12.3, ' threshold =', D12.3 )
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RETURN
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*
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* End of CCHKEC
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*
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END
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