LAPACK  3.4.1
LAPACK: Linear Algebra PACKage
zchkec.f
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00001 *> \brief \b ZCHKEC
00002 *
00003 *  =========== DOCUMENTATION ===========
00004 *
00005 * Online html documentation available at 
00006 *            http://www.netlib.org/lapack/explore-html/ 
00007 *
00008 *  Definition:
00009 *  ===========
00010 *
00011 *       SUBROUTINE ZCHKEC( THRESH, TSTERR, NIN, NOUT )
00012 * 
00013 *       .. Scalar Arguments ..
00014 *       LOGICAL            TSTERR
00015 *       INTEGER            NIN, NOUT
00016 *       DOUBLE PRECISION   THRESH
00017 *       ..
00018 *  
00019 *
00020 *> \par Purpose:
00021 *  =============
00022 *>
00023 *> \verbatim
00024 *>
00025 *> ZCHKEC tests eigen- condition estimation routines
00026 *>        ZTRSYL, CTREXC, CTRSNA, CTRSEN
00027 *>
00028 *> In all cases, the routine runs through a fixed set of numerical
00029 *> examples, subjects them to various tests, and compares the test
00030 *> results to a threshold THRESH. In addition, ZTRSNA and CTRSEN are
00031 *> tested by reading in precomputed examples from a file (on input unit
00032 *> NIN).  Output is written to output unit NOUT.
00033 *> \endverbatim
00034 *
00035 *  Arguments:
00036 *  ==========
00037 *
00038 *> \param[in] THRESH
00039 *> \verbatim
00040 *>          THRESH is DOUBLE PRECISION
00041 *>          Threshold for residual tests.  A computed test ratio passes
00042 *>          the threshold if it is less than THRESH.
00043 *> \endverbatim
00044 *>
00045 *> \param[in] TSTERR
00046 *> \verbatim
00047 *>          TSTERR is LOGICAL
00048 *>          Flag that indicates whether error exits are to be tested.
00049 *> \endverbatim
00050 *>
00051 *> \param[in] NIN
00052 *> \verbatim
00053 *>          NIN is INTEGER
00054 *>          The logical unit number for input.
00055 *> \endverbatim
00056 *>
00057 *> \param[in] NOUT
00058 *> \verbatim
00059 *>          NOUT is INTEGER
00060 *>          The logical unit number for output.
00061 *> \endverbatim
00062 *
00063 *  Authors:
00064 *  ========
00065 *
00066 *> \author Univ. of Tennessee 
00067 *> \author Univ. of California Berkeley 
00068 *> \author Univ. of Colorado Denver 
00069 *> \author NAG Ltd. 
00070 *
00071 *> \date November 2011
00072 *
00073 *> \ingroup complex16_eig
00074 *
00075 *  =====================================================================
00076       SUBROUTINE ZCHKEC( THRESH, TSTERR, NIN, NOUT )
00077 *
00078 *  -- LAPACK test routine (version 3.4.0) --
00079 *  -- LAPACK is a software package provided by Univ. of Tennessee,    --
00080 *  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
00081 *     November 2011
00082 *
00083 *     .. Scalar Arguments ..
00084       LOGICAL            TSTERR
00085       INTEGER            NIN, NOUT
00086       DOUBLE PRECISION   THRESH
00087 *     ..
00088 *
00089 *  =====================================================================
00090 *
00091 *     .. Local Scalars ..
00092       LOGICAL            OK
00093       CHARACTER*3        PATH
00094       INTEGER            KTREXC, KTRSEN, KTRSNA, KTRSYL, LTREXC, LTRSYL,
00095      $                   NTESTS, NTREXC, NTRSYL
00096       DOUBLE PRECISION   EPS, RTREXC, RTRSYL, SFMIN
00097 *     ..
00098 *     .. Local Arrays ..
00099       INTEGER            LTRSEN( 3 ), LTRSNA( 3 ), NTRSEN( 3 ),
00100      $                   NTRSNA( 3 )
00101       DOUBLE PRECISION   RTRSEN( 3 ), RTRSNA( 3 )
00102 *     ..
00103 *     .. External Subroutines ..
00104       EXTERNAL           ZERREC, ZGET35, ZGET36, ZGET37, ZGET38
00105 *     ..
00106 *     .. External Functions ..
00107       DOUBLE PRECISION   DLAMCH
00108       EXTERNAL           DLAMCH
00109 *     ..
00110 *     .. Executable Statements ..
00111 *
00112       PATH( 1: 1 ) = 'Zomplex precision'
00113       PATH( 2: 3 ) = 'EC'
00114       EPS = DLAMCH( 'P' )
00115       SFMIN = DLAMCH( 'S' )
00116       WRITE( NOUT, FMT = 9994 )
00117       WRITE( NOUT, FMT = 9993 )EPS, SFMIN
00118       WRITE( NOUT, FMT = 9992 )THRESH
00119 *
00120 *     Test error exits if TSTERR is .TRUE.
00121 *
00122       IF( TSTERR )
00123      $   CALL ZERREC( PATH, NOUT )
00124 *
00125       OK = .TRUE.
00126       CALL ZGET35( RTRSYL, LTRSYL, NTRSYL, KTRSYL, NIN )
00127       IF( RTRSYL.GT.THRESH ) THEN
00128          OK = .FALSE.
00129          WRITE( NOUT, FMT = 9999 )RTRSYL, LTRSYL, NTRSYL, KTRSYL
00130       END IF
00131 *
00132       CALL ZGET36( RTREXC, LTREXC, NTREXC, KTREXC, NIN )
00133       IF( RTREXC.GT.THRESH .OR. NTREXC.GT.0 ) THEN
00134          OK = .FALSE.
00135          WRITE( NOUT, FMT = 9998 )RTREXC, LTREXC, NTREXC, KTREXC
00136       END IF
00137 *
00138       CALL ZGET37( RTRSNA, LTRSNA, NTRSNA, KTRSNA, NIN )
00139       IF( RTRSNA( 1 ).GT.THRESH .OR. RTRSNA( 2 ).GT.THRESH .OR.
00140      $    NTRSNA( 1 ).NE.0 .OR. NTRSNA( 2 ).NE.0 .OR. NTRSNA( 3 ).NE.0 )
00141      $     THEN
00142          OK = .FALSE.
00143          WRITE( NOUT, FMT = 9997 )RTRSNA, LTRSNA, NTRSNA, KTRSNA
00144       END IF
00145 *
00146       CALL ZGET38( RTRSEN, LTRSEN, NTRSEN, KTRSEN, NIN )
00147       IF( RTRSEN( 1 ).GT.THRESH .OR. RTRSEN( 2 ).GT.THRESH .OR.
00148      $    NTRSEN( 1 ).NE.0 .OR. NTRSEN( 2 ).NE.0 .OR. NTRSEN( 3 ).NE.0 )
00149      $     THEN
00150          OK = .FALSE.
00151          WRITE( NOUT, FMT = 9996 )RTRSEN, LTRSEN, NTRSEN, KTRSEN
00152       END IF
00153 *
00154       NTESTS = KTRSYL + KTREXC + KTRSNA + KTRSEN
00155       IF( OK )
00156      $   WRITE( NOUT, FMT = 9995 )PATH, NTESTS
00157 *
00158  9999 FORMAT( ' Error in ZTRSYL: RMAX =', D12.3, / ' LMAX = ', I8,
00159      $      ' NINFO=', I8, ' KNT=', I8 )
00160  9998 FORMAT( ' Error in ZTREXC: RMAX =', D12.3, / ' LMAX = ', I8,
00161      $      ' NINFO=', I8, ' KNT=', I8 )
00162  9997 FORMAT( ' Error in ZTRSNA: RMAX =', 3D12.3, / ' LMAX = ', 3I8,
00163      $      ' NINFO=', 3I8, ' KNT=', I8 )
00164  9996 FORMAT( ' Error in ZTRSEN: RMAX =', 3D12.3, / ' LMAX = ', 3I8,
00165      $      ' NINFO=', 3I8, ' KNT=', I8 )
00166  9995 FORMAT( / 1X, 'All tests for ', A3,
00167      $      ' routines passed the threshold ( ', I6, ' tests run)' )
00168  9994 FORMAT( ' Tests of the Nonsymmetric eigenproblem condition',
00169      $      ' estimation routines', / ' ZTRSYL, CTREXC, CTRSNA, CTRSEN',
00170      $      / )
00171  9993 FORMAT( ' Relative machine precision (EPS) = ', D16.6,
00172      $      / ' Safe minimum (SFMIN)             = ', D16.6, / )
00173  9992 FORMAT( ' Routines pass computational tests if test ratio is ',
00174      $      'less than', F8.2, / / )
00175       RETURN
00176 *
00177 *     End of ZCHKEC
00178 *
00179       END
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