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- *> \brief \b ZCHKEC
- *
- * =========== DOCUMENTATION ===========
- *
- * Online html documentation available at
- * http://www.netlib.org/lapack/explore-html/
- *
- * Definition:
- * ===========
- *
- * SUBROUTINE ZCHKEC( THRESH, TSTERR, NIN, NOUT )
- *
- * .. Scalar Arguments ..
- * LOGICAL TSTERR
- * INTEGER NIN, NOUT
- * DOUBLE PRECISION THRESH
- * ..
- *
- *
- *> \par Purpose:
- * =============
- *>
- *> \verbatim
- *>
- *> ZCHKEC tests eigen- condition estimation routines
- *> ZTRSYL, CTREXC, CTRSNA, CTRSEN
- *>
- *> In all cases, the routine runs through a fixed set of numerical
- *> examples, subjects them to various tests, and compares the test
- *> results to a threshold THRESH. In addition, ZTRSNA and CTRSEN are
- *> tested by reading in precomputed examples from a file (on input unit
- *> NIN). Output is written to output unit NOUT.
- *> \endverbatim
- *
- * Arguments:
- * ==========
- *
- *> \param[in] THRESH
- *> \verbatim
- *> THRESH is DOUBLE PRECISION
- *> Threshold for residual tests. A computed test ratio passes
- *> the threshold if it is less than THRESH.
- *> \endverbatim
- *>
- *> \param[in] TSTERR
- *> \verbatim
- *> TSTERR is LOGICAL
- *> Flag that indicates whether error exits are to be tested.
- *> \endverbatim
- *>
- *> \param[in] NIN
- *> \verbatim
- *> NIN is INTEGER
- *> The logical unit number for input.
- *> \endverbatim
- *>
- *> \param[in] NOUT
- *> \verbatim
- *> NOUT is INTEGER
- *> The logical unit number for output.
- *> \endverbatim
- *
- * Authors:
- * ========
- *
- *> \author Univ. of Tennessee
- *> \author Univ. of California Berkeley
- *> \author Univ. of Colorado Denver
- *> \author NAG Ltd.
- *
- *> \ingroup complex16_eig
- *
- * =====================================================================
- SUBROUTINE ZCHKEC( THRESH, TSTERR, NIN, NOUT )
- *
- * -- LAPACK test routine --
- * -- LAPACK is a software package provided by Univ. of Tennessee, --
- * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
- *
- * .. Scalar Arguments ..
- LOGICAL TSTERR
- INTEGER NIN, NOUT
- DOUBLE PRECISION THRESH
- * ..
- *
- * =====================================================================
- *
- * .. Local Scalars ..
- LOGICAL OK
- CHARACTER*3 PATH
- INTEGER KTREXC, KTRSEN, KTRSNA, KTRSYL, KTRSYL3,
- $ LTREXC, LTRSYL, NTESTS, NTREXC, NTRSYL
- DOUBLE PRECISION EPS, RTREXC, SFMIN
- * ..
- * .. Local Arrays ..
- INTEGER FTRSYL( 3 ), ITRSYL( 2 ), LTRSEN( 3 ),
- $ LTRSNA( 3 ), NTRSEN( 3 ), NTRSNA( 3 )
- DOUBLE PRECISION RTRSEN( 3 ), RTRSNA( 3 ), RTRSYL( 2 )
- * ..
- * .. External Subroutines ..
- EXTERNAL ZERREC, ZGET35, ZGET36, ZGET37, ZGET38, ZSYL01
- * ..
- * .. External Functions ..
- DOUBLE PRECISION DLAMCH
- EXTERNAL DLAMCH
- * ..
- * .. Executable Statements ..
- *
- PATH( 1: 1 ) = 'Zomplex precision'
- PATH( 2: 3 ) = 'EC'
- EPS = DLAMCH( 'P' )
- SFMIN = DLAMCH( 'S' )
- WRITE( NOUT, FMT = 9994 )
- WRITE( NOUT, FMT = 9993 )EPS, SFMIN
- WRITE( NOUT, FMT = 9992 )THRESH
- *
- * Test error exits if TSTERR is .TRUE.
- *
- IF( TSTERR )
- $ CALL ZERREC( PATH, NOUT )
- *
- OK = .TRUE.
- CALL ZGET35( RTRSYL( 1 ), LTRSYL, NTRSYL, KTRSYL, NIN )
- IF( RTRSYL( 1 ).GT.THRESH ) THEN
- OK = .FALSE.
- WRITE( NOUT, FMT = 9999 )RTRSYL( 1 ), LTRSYL, NTRSYL, KTRSYL
- END IF
- *
- CALL ZSYL01( THRESH, FTRSYL, RTRSYL, ITRSYL, KTRSYL3 )
- IF( FTRSYL( 1 ).GT.0 ) THEN
- OK = .FALSE.
- WRITE( NOUT, FMT = 9970 )FTRSYL( 1 ), RTRSYL( 1 ), THRESH
- END IF
- IF( FTRSYL( 2 ).GT.0 ) THEN
- OK = .FALSE.
- WRITE( NOUT, FMT = 9971 )FTRSYL( 2 ), RTRSYL( 2 ), THRESH
- END IF
- IF( FTRSYL( 3 ).GT.0 ) THEN
- OK = .FALSE.
- WRITE( NOUT, FMT = 9972 )FTRSYL( 3 )
- END IF
- *
- CALL ZGET36( RTREXC, LTREXC, NTREXC, KTREXC, NIN )
- IF( RTREXC.GT.THRESH .OR. NTREXC.GT.0 ) THEN
- OK = .FALSE.
- WRITE( NOUT, FMT = 9998 )RTREXC, LTREXC, NTREXC, KTREXC
- END IF
- *
- CALL ZGET37( RTRSNA, LTRSNA, NTRSNA, KTRSNA, NIN )
- IF( RTRSNA( 1 ).GT.THRESH .OR. RTRSNA( 2 ).GT.THRESH .OR.
- $ NTRSNA( 1 ).NE.0 .OR. NTRSNA( 2 ).NE.0 .OR. NTRSNA( 3 ).NE.0 )
- $ THEN
- OK = .FALSE.
- WRITE( NOUT, FMT = 9997 )RTRSNA, LTRSNA, NTRSNA, KTRSNA
- END IF
- *
- CALL ZGET38( RTRSEN, LTRSEN, NTRSEN, KTRSEN, NIN )
- IF( RTRSEN( 1 ).GT.THRESH .OR. RTRSEN( 2 ).GT.THRESH .OR.
- $ NTRSEN( 1 ).NE.0 .OR. NTRSEN( 2 ).NE.0 .OR. NTRSEN( 3 ).NE.0 )
- $ THEN
- OK = .FALSE.
- WRITE( NOUT, FMT = 9996 )RTRSEN, LTRSEN, NTRSEN, KTRSEN
- END IF
- *
- NTESTS = KTRSYL + KTRSYL3 + KTREXC + KTRSNA + KTRSEN
- IF( OK )
- $ WRITE( NOUT, FMT = 9995 )PATH, NTESTS
- *
- 9999 FORMAT( ' Error in ZTRSYL: RMAX =', D12.3, / ' LMAX = ', I8,
- $ ' NINFO=', I8, ' KNT=', I8 )
- 9998 FORMAT( ' Error in ZTREXC: RMAX =', D12.3, / ' LMAX = ', I8,
- $ ' NINFO=', I8, ' KNT=', I8 )
- 9997 FORMAT( ' Error in ZTRSNA: RMAX =', 3D12.3, / ' LMAX = ', 3I8,
- $ ' NINFO=', 3I8, ' KNT=', I8 )
- 9996 FORMAT( ' Error in ZTRSEN: RMAX =', 3D12.3, / ' LMAX = ', 3I8,
- $ ' NINFO=', 3I8, ' KNT=', I8 )
- 9995 FORMAT( / 1X, 'All tests for ', A3,
- $ ' routines passed the threshold ( ', I6, ' tests run)' )
- 9994 FORMAT( ' Tests of the Nonsymmetric eigenproblem condition',
- $ ' estimation routines', / ' ZTRSYL, ZTREXC, ZTRSNA, ZTRSEN',
- $ / )
- 9993 FORMAT( ' Relative machine precision (EPS) = ', D16.6,
- $ / ' Safe minimum (SFMIN) = ', D16.6, / )
- 9992 FORMAT( ' Routines pass computational tests if test ratio is ',
- $ 'less than', F8.2, / / )
- 9970 FORMAT( 'Error in ZTRSYL: ', I8, ' tests fail the threshold.', /
- $ 'Maximum test ratio =', D12.3, ' threshold =', D12.3 )
- 9971 FORMAT( 'Error in ZTRSYL3: ', I8, ' tests fail the threshold.', /
- $ 'Maximum test ratio =', D12.3, ' threshold =', D12.3 )
- 9972 FORMAT( 'ZTRSYL and ZTRSYL3 compute an inconsistent scale ',
- $ 'factor in ', I8, ' tests.')
- RETURN
- *
- * End of ZCHKEC
- *
- END
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