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SUBROUTINE ZCHKEC( THRESH, TSTERR, NIN, NOUT )
*
* -- LAPACK test routine (version 3.0) --
* Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,
* Courant Institute, Argonne National Lab, and Rice University
* September 30, 1994
*
* .. Scalar Arguments ..
LOGICAL TSTERR
INTEGER NIN, NOUT
DOUBLE PRECISION THRESH
* ..
*
* Purpose
* =======
*
* 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.
*
* Arguments
* =========
*
* THRESH (input) DOUBLE PRECISION
* Threshold for residual tests. A computed test ratio passes
* the threshold if it is less than THRESH.
*
* TSTERR (input) LOGICAL
* Flag that indicates whether error exits are to be tested.
*
* NIN (input) INTEGER
* The logical unit number for input.
*
* NOUT (input) INTEGER
* The logical unit number for output.
*
* =====================================================================
*
* .. Local Scalars ..
LOGICAL OK
CHARACTER*3 PATH
INTEGER KTREXC, KTRSEN, KTRSNA, KTRSYL, LTREXC, LTRSYL,
$ NTESTS, NTREXC, NTRSYL
DOUBLE PRECISION EPS, RTREXC, RTRSYL, SFMIN
* ..
* .. Local Arrays ..
INTEGER LTRSEN( 3 ), LTRSNA( 3 ), NTRSEN( 3 ),
$ NTRSNA( 3 )
DOUBLE PRECISION RTRSEN( 3 ), RTRSNA( 3 )
* ..
* .. External Subroutines ..
EXTERNAL ZERREC, ZGET35, ZGET36, ZGET37, ZGET38
* ..
* .. 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, LTRSYL, NTRSYL, KTRSYL, NIN )
IF( RTRSYL.GT.THRESH ) THEN
OK = .FALSE.
WRITE( NOUT, FMT = 9999 )RTRSYL, LTRSYL, NTRSYL, KTRSYL
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 + 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, CTREXC, CTRSNA, CTRSEN',
$ / )
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, / / )
RETURN
*
* End of ZCHKEC
*
END
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