LAPACK: TESTING/LIN/derrsy.f Source File

00001       SUBROUTINE DERRSY( PATH, NUNIT )
00002 *
00003 *  -- LAPACK test routine (version 3.1) --
00004 *     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
00005 *     November 2006
00006 *
00007 *     .. Scalar Arguments ..
00008       CHARACTER*3        PATH
00009       INTEGER            NUNIT
00010 *     ..
00011 *
00012 *  Purpose
00013 *  =======
00014 *
00015 *  DERRSY tests the error exits for the DOUBLE PRECISION routines
00016 *  for symmetric indefinite matrices.
00017 *
00018 *  Arguments
00019 *  =========
00020 *
00021 *  PATH    (input) CHARACTER*3
00022 *          The LAPACK path name for the routines to be tested.
00023 *
00024 *  NUNIT   (input) INTEGER
00025 *          The unit number for output.
00026 *
00027 *  =====================================================================
00028 *
00029 *     .. Parameters ..
00030       INTEGER            NMAX
00031       PARAMETER          ( NMAX = 4 )
00032 *     ..
00033 *     .. Local Scalars ..
00034       CHARACTER*2        C2
00035       INTEGER            I, INFO, J
00036       DOUBLE PRECISION   ANRM, RCOND
00037 *     ..
00038 *     .. Local Arrays ..
00039       INTEGER            IP( NMAX ), IW( NMAX )
00040       DOUBLE PRECISION   A( NMAX, NMAX ), AF( NMAX, NMAX ), B( NMAX ),
00041      $                   R1( NMAX ), R2( NMAX ), W( 3*NMAX ), X( NMAX )
00042 *     ..
00043 *     .. External Functions ..
00044       LOGICAL            LSAMEN
00045       EXTERNAL           LSAMEN
00046 *     ..
00047 *     .. External Subroutines ..
00048       EXTERNAL           ALAESM, CHKXER, DSPCON, DSPRFS, DSPTRF, DSPTRI,
00049      $                   DSPTRS, DSYCON, DSYRFS, DSYTF2, DSYTRF, DSYTRI,
00050      $                   DSYTRS
00051 *     ..
00052 *     .. Scalars in Common ..
00053       LOGICAL            LERR, OK
00054       CHARACTER*32       SRNAMT
00055       INTEGER            INFOT, NOUT
00056 *     ..
00057 *     .. Common blocks ..
00058       COMMON             / INFOC / INFOT, NOUT, OK, LERR
00059       COMMON             / SRNAMC / SRNAMT
00060 *     ..
00061 *     .. Intrinsic Functions ..
00062       INTRINSIC          DBLE
00063 *     ..
00064 *     .. Executable Statements ..
00065 *
00066       NOUT = NUNIT
00067       WRITE( NOUT, FMT = * )
00068       C2 = PATH( 2: 3 )
00069 *
00070 *     Set the variables to innocuous values.
00071 *
00072       DO 20 J = 1, NMAX
00073          DO 10 I = 1, NMAX
00074             A( I, J ) = 1.D0 / DBLE( I+J )
00075             AF( I, J ) = 1.D0 / DBLE( I+J )
00076    10    CONTINUE
00077          B( J ) = 0.D0
00078          R1( J ) = 0.D0
00079          R2( J ) = 0.D0
00080          W( J ) = 0.D0
00081          X( J ) = 0.D0
00082          IP( J ) = J
00083          IW( J ) = J
00084    20 CONTINUE
00085       ANRM = 1.0D0
00086       RCOND = 1.0D0
00087       OK = .TRUE.
00088 *
00089       IF( LSAMEN( 2, C2, 'SY' ) ) THEN
00090 *
00091 *        Test error exits of the routines that use the Bunch-Kaufman
00092 *        factorization of a symmetric indefinite matrix.
00093 *
00094 *        DSYTRF
00095 *
00096          SRNAMT = 'DSYTRF'
00097          INFOT = 1
00098          CALL DSYTRF( '/', 0, A, 1, IP, W, 1, INFO )
00099          CALL CHKXER( 'DSYTRF', INFOT, NOUT, LERR, OK )
00100          INFOT = 2
00101          CALL DSYTRF( 'U', -1, A, 1, IP, W, 1, INFO )
00102          CALL CHKXER( 'DSYTRF', INFOT, NOUT, LERR, OK )
00103          INFOT = 4
00104          CALL DSYTRF( 'U', 2, A, 1, IP, W, 4, INFO )
00105          CALL CHKXER( 'DSYTRF', INFOT, NOUT, LERR, OK )
00106 *
00107 *        DSYTF2
00108 *
00109          SRNAMT = 'DSYTF2'
00110          INFOT = 1
00111          CALL DSYTF2( '/', 0, A, 1, IP, INFO )
00112          CALL CHKXER( 'DSYTF2', INFOT, NOUT, LERR, OK )
00113          INFOT = 2
00114          CALL DSYTF2( 'U', -1, A, 1, IP, INFO )
00115          CALL CHKXER( 'DSYTF2', INFOT, NOUT, LERR, OK )
00116          INFOT = 4
00117          CALL DSYTF2( 'U', 2, A, 1, IP, INFO )
00118          CALL CHKXER( 'DSYTF2', INFOT, NOUT, LERR, OK )
00119 *
00120 *        DSYTRI
00121 *
00122          SRNAMT = 'DSYTRI'
00123          INFOT = 1
00124          CALL DSYTRI( '/', 0, A, 1, IP, W, INFO )
00125          CALL CHKXER( 'DSYTRI', INFOT, NOUT, LERR, OK )
00126          INFOT = 2
00127          CALL DSYTRI( 'U', -1, A, 1, IP, W, INFO )
00128          CALL CHKXER( 'DSYTRI', INFOT, NOUT, LERR, OK )
00129          INFOT = 4
00130          CALL DSYTRI( 'U', 2, A, 1, IP, W, INFO )
00131          CALL CHKXER( 'DSYTRI', INFOT, NOUT, LERR, OK )
00132 *
00133 *        DSYTRS
00134 *
00135          SRNAMT = 'DSYTRS'
00136          INFOT = 1
00137          CALL DSYTRS( '/', 0, 0, A, 1, IP, B, 1, INFO )
00138          CALL CHKXER( 'DSYTRS', INFOT, NOUT, LERR, OK )
00139          INFOT = 2
00140          CALL DSYTRS( 'U', -1, 0, A, 1, IP, B, 1, INFO )
00141          CALL CHKXER( 'DSYTRS', INFOT, NOUT, LERR, OK )
00142          INFOT = 3
00143          CALL DSYTRS( 'U', 0, -1, A, 1, IP, B, 1, INFO )
00144          CALL CHKXER( 'DSYTRS', INFOT, NOUT, LERR, OK )
00145          INFOT = 5
00146          CALL DSYTRS( 'U', 2, 1, A, 1, IP, B, 2, INFO )
00147          CALL CHKXER( 'DSYTRS', INFOT, NOUT, LERR, OK )
00148          INFOT = 8
00149          CALL DSYTRS( 'U', 2, 1, A, 2, IP, B, 1, INFO )
00150          CALL CHKXER( 'DSYTRS', INFOT, NOUT, LERR, OK )
00151 *
00152 *        DSYRFS
00153 *
00154          SRNAMT = 'DSYRFS'
00155          INFOT = 1
00156          CALL DSYRFS( '/', 0, 0, A, 1, AF, 1, IP, B, 1, X, 1, R1, R2, W,
00157      $                IW, INFO )
00158          CALL CHKXER( 'DSYRFS', INFOT, NOUT, LERR, OK )
00159          INFOT = 2
00160          CALL DSYRFS( 'U', -1, 0, A, 1, AF, 1, IP, B, 1, X, 1, R1, R2,
00161      $                W, IW, INFO )
00162          CALL CHKXER( 'DSYRFS', INFOT, NOUT, LERR, OK )
00163          INFOT = 3
00164          CALL DSYRFS( 'U', 0, -1, A, 1, AF, 1, IP, B, 1, X, 1, R1, R2,
00165      $                W, IW, INFO )
00166          CALL CHKXER( 'DSYRFS', INFOT, NOUT, LERR, OK )
00167          INFOT = 5
00168          CALL DSYRFS( 'U', 2, 1, A, 1, AF, 2, IP, B, 2, X, 2, R1, R2, W,
00169      $                IW, INFO )
00170          CALL CHKXER( 'DSYRFS', INFOT, NOUT, LERR, OK )
00171          INFOT = 7
00172          CALL DSYRFS( 'U', 2, 1, A, 2, AF, 1, IP, B, 2, X, 2, R1, R2, W,
00173      $                IW, INFO )
00174          CALL CHKXER( 'DSYRFS', INFOT, NOUT, LERR, OK )
00175          INFOT = 10
00176          CALL DSYRFS( 'U', 2, 1, A, 2, AF, 2, IP, B, 1, X, 2, R1, R2, W,
00177      $                IW, INFO )
00178          CALL CHKXER( 'DSYRFS', INFOT, NOUT, LERR, OK )
00179          INFOT = 12
00180          CALL DSYRFS( 'U', 2, 1, A, 2, AF, 2, IP, B, 2, X, 1, R1, R2, W,
00181      $                IW, INFO )
00182          CALL CHKXER( 'DSYRFS', INFOT, NOUT, LERR, OK )
00183 *
00184 *        DSYCON
00185 *
00186          SRNAMT = 'DSYCON'
00187          INFOT = 1
00188          CALL DSYCON( '/', 0, A, 1, IP, ANRM, RCOND, W, IW, INFO )
00189          CALL CHKXER( 'DSYCON', INFOT, NOUT, LERR, OK )
00190          INFOT = 2
00191          CALL DSYCON( 'U', -1, A, 1, IP, ANRM, RCOND, W, IW, INFO )
00192          CALL CHKXER( 'DSYCON', INFOT, NOUT, LERR, OK )
00193          INFOT = 4
00194          CALL DSYCON( 'U', 2, A, 1, IP, ANRM, RCOND, W, IW, INFO )
00195          CALL CHKXER( 'DSYCON', INFOT, NOUT, LERR, OK )
00196          INFOT = 6
00197          CALL DSYCON( 'U', 1, A, 1, IP, -1.0D0, RCOND, W, IW, INFO )
00198          CALL CHKXER( 'DSYCON', INFOT, NOUT, LERR, OK )
00199 *
00200       ELSE IF( LSAMEN( 2, C2, 'SP' ) ) THEN
00201 *
00202 *        Test error exits of the routines that use the Bunch-Kaufman
00203 *        factorization of a symmetric indefinite packed matrix.
00204 *
00205 *        DSPTRF
00206 *
00207          SRNAMT = 'DSPTRF'
00208          INFOT = 1
00209          CALL DSPTRF( '/', 0, A, IP, INFO )
00210          CALL CHKXER( 'DSPTRF', INFOT, NOUT, LERR, OK )
00211          INFOT = 2
00212          CALL DSPTRF( 'U', -1, A, IP, INFO )
00213          CALL CHKXER( 'DSPTRF', INFOT, NOUT, LERR, OK )
00214 *
00215 *        DSPTRI
00216 *
00217          SRNAMT = 'DSPTRI'
00218          INFOT = 1
00219          CALL DSPTRI( '/', 0, A, IP, W, INFO )
00220          CALL CHKXER( 'DSPTRI', INFOT, NOUT, LERR, OK )
00221          INFOT = 2
00222          CALL DSPTRI( 'U', -1, A, IP, W, INFO )
00223          CALL CHKXER( 'DSPTRI', INFOT, NOUT, LERR, OK )
00224 *
00225 *        DSPTRS
00226 *
00227          SRNAMT = 'DSPTRS'
00228          INFOT = 1
00229          CALL DSPTRS( '/', 0, 0, A, IP, B, 1, INFO )
00230          CALL CHKXER( 'DSPTRS', INFOT, NOUT, LERR, OK )
00231          INFOT = 2
00232          CALL DSPTRS( 'U', -1, 0, A, IP, B, 1, INFO )
00233          CALL CHKXER( 'DSPTRS', INFOT, NOUT, LERR, OK )
00234          INFOT = 3
00235          CALL DSPTRS( 'U', 0, -1, A, IP, B, 1, INFO )
00236          CALL CHKXER( 'DSPTRS', INFOT, NOUT, LERR, OK )
00237          INFOT = 7
00238          CALL DSPTRS( 'U', 2, 1, A, IP, B, 1, INFO )
00239          CALL CHKXER( 'DSPTRS', INFOT, NOUT, LERR, OK )
00240 *
00241 *        DSPRFS
00242 *
00243          SRNAMT = 'DSPRFS'
00244          INFOT = 1
00245          CALL DSPRFS( '/', 0, 0, A, AF, IP, B, 1, X, 1, R1, R2, W, IW,
00246      $                INFO )
00247          CALL CHKXER( 'DSPRFS', INFOT, NOUT, LERR, OK )
00248          INFOT = 2
00249          CALL DSPRFS( 'U', -1, 0, A, AF, IP, B, 1, X, 1, R1, R2, W, IW,
00250      $                INFO )
00251          CALL CHKXER( 'DSPRFS', INFOT, NOUT, LERR, OK )
00252          INFOT = 3
00253          CALL DSPRFS( 'U', 0, -1, A, AF, IP, B, 1, X, 1, R1, R2, W, IW,
00254      $                INFO )
00255          CALL CHKXER( 'DSPRFS', INFOT, NOUT, LERR, OK )
00256          INFOT = 8
00257          CALL DSPRFS( 'U', 2, 1, A, AF, IP, B, 1, X, 2, R1, R2, W, IW,
00258      $                INFO )
00259          CALL CHKXER( 'DSPRFS', INFOT, NOUT, LERR, OK )
00260          INFOT = 10
00261          CALL DSPRFS( 'U', 2, 1, A, AF, IP, B, 2, X, 1, R1, R2, W, IW,
00262      $                INFO )
00263          CALL CHKXER( 'DSPRFS', INFOT, NOUT, LERR, OK )
00264 *
00265 *        DSPCON
00266 *
00267          SRNAMT = 'DSPCON'
00268          INFOT = 1
00269          CALL DSPCON( '/', 0, A, IP, ANRM, RCOND, W, IW, INFO )
00270          CALL CHKXER( 'DSPCON', INFOT, NOUT, LERR, OK )
00271          INFOT = 2
00272          CALL DSPCON( 'U', -1, A, IP, ANRM, RCOND, W, IW, INFO )
00273          CALL CHKXER( 'DSPCON', INFOT, NOUT, LERR, OK )
00274          INFOT = 5
00275          CALL DSPCON( 'U', 1, A, IP, -1.0D0, RCOND, W, IW, INFO )
00276          CALL CHKXER( 'DSPCON', INFOT, NOUT, LERR, OK )
00277       END IF
00278 *
00279 *     Print a summary line.
00280 *
00281       CALL ALAESM( PATH, OK, NOUT )
00282 *
00283       RETURN
00284 *
00285 *     End of DERRSY
00286 *
00287       END