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SUBROUTINE ZCHKEC( THRESH, TSTERR, NIN, NOUT )
* * -- LAPACK test routine (version 3.1) -- * Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. * November 2006 * * .. 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 |