LAPACK: TESTING/LIN/ddrvsyx.f Source File

Go to the documentation of this file.
00001       SUBROUTINE DDRVSY( DOTYPE, NN, NVAL, NRHS, THRESH, TSTERR, NMAX,
00002      $                   A, AFAC, AINV, B, X, XACT, WORK, RWORK, IWORK,
00003      $                   NOUT )
00004 *
00005 *  -- LAPACK test routine (version 3.2) --
00006 *     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
00007 *     November 2006
00008 *
00009 *     .. Scalar Arguments ..
00010       LOGICAL            TSTERR
00011       INTEGER            NMAX, NN, NOUT, NRHS
00012       DOUBLE PRECISION   THRESH
00013 *     ..
00014 *     .. Array Arguments ..
00015       LOGICAL            DOTYPE( * )
00016       INTEGER            IWORK( * ), NVAL( * )
00017       DOUBLE PRECISION   A( * ), AFAC( * ), AINV( * ), B( * ),
00018      $                   RWORK( * ), WORK( * ), X( * ), XACT( * )
00019 *     ..
00020 *
00021 *  Purpose
00022 *  =======
00023 *
00024 *  DDRVSY tests the driver routines DSYSV, -SVX, and -SVXX.
00025 *
00026 *  Note that this file is used only when the XBLAS are available,
00027 *  otherwise ddrvsy.f defines this subroutine.
00028 *
00029 *  Arguments
00030 *  =========
00031 *
00032 *  DOTYPE  (input) LOGICAL array, dimension (NTYPES)
00033 *          The matrix types to be used for testing.  Matrices of type j
00034 *          (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) =
00035 *          .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used.
00036 *
00037 *  NN      (input) INTEGER
00038 *          The number of values of N contained in the vector NVAL.
00039 *
00040 *  NVAL    (input) INTEGER array, dimension (NN)
00041 *          The values of the matrix dimension N.
00042 *
00043 *  NRHS    (input) INTEGER
00044 *          The number of right hand side vectors to be generated for
00045 *          each linear system.
00046 *
00047 *  THRESH  (input) DOUBLE PRECISION
00048 *          The threshold value for the test ratios.  A result is
00049 *          included in the output file if RESULT >= THRESH.  To have
00050 *          every test ratio printed, use THRESH = 0.
00051 *
00052 *  TSTERR  (input) LOGICAL
00053 *          Flag that indicates whether error exits are to be tested.
00054 *
00055 *  NMAX    (input) INTEGER
00056 *          The maximum value permitted for N, used in dimensioning the
00057 *          work arrays.
00058 *
00059 *  A       (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
00060 *
00061 *  AFAC    (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
00062 *
00063 *  AINV    (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
00064 *
00065 *  B       (workspace) DOUBLE PRECISION array, dimension (NMAX*NRHS)
00066 *
00067 *  X       (workspace) DOUBLE PRECISION array, dimension (NMAX*NRHS)
00068 *
00069 *  XACT    (workspace) DOUBLE PRECISION array, dimension (NMAX*NRHS)
00070 *
00071 *  WORK    (workspace) DOUBLE PRECISION array, dimension
00072 *                      (NMAX*max(2,NRHS))
00073 *
00074 *  RWORK   (workspace) DOUBLE PRECISION array, dimension (NMAX+2*NRHS)
00075 *
00076 *  IWORK   (workspace) INTEGER array, dimension (2*NMAX)
00077 *
00078 *  NOUT    (input) INTEGER
00079 *          The unit number for output.
00080 *
00081 *  =====================================================================
00082 *
00083 *     .. Parameters ..
00084       DOUBLE PRECISION   ONE, ZERO
00085       PARAMETER          ( ONE = 1.0D+0, ZERO = 0.0D+0 )
00086       INTEGER            NTYPES, NTESTS
00087       PARAMETER          ( NTYPES = 10, NTESTS = 6 )
00088       INTEGER            NFACT
00089       PARAMETER          ( NFACT = 2 )
00090 *     ..
00091 *     .. Local Scalars ..
00092       LOGICAL            ZEROT
00093       CHARACTER          DIST, EQUED, FACT, TYPE, UPLO, XTYPE
00094       CHARACTER*3        PATH
00095       INTEGER            I, I1, I2, IFACT, IMAT, IN, INFO, IOFF, IUPLO,
00096      $                   IZERO, J, K, K1, KL, KU, LDA, LWORK, MODE, N,
00097      $                   NB, NBMIN, NERRS, NFAIL, NIMAT, NRUN, NT,
00098      $                   N_ERR_BNDS
00099       DOUBLE PRECISION   AINVNM, ANORM, CNDNUM, RCOND, RCONDC,
00100      $                   RPVGRW_SVXX
00101 *     ..
00102 *     .. Local Arrays ..
00103       CHARACTER          FACTS( NFACT ), UPLOS( 2 )
00104       INTEGER            ISEED( 4 ), ISEEDY( 4 )
00105       DOUBLE PRECISION   RESULT( NTESTS ), BERR( NRHS ),
00106      $                   ERRBNDS_N( NRHS, 3 ), ERRBNDS_C( NRHS, 3 )
00107 *     ..
00108 *     .. External Functions ..
00109       DOUBLE PRECISION   DGET06, DLANSY
00110       EXTERNAL           DGET06, DLANSY
00111 *     ..
00112 *     .. External Subroutines ..
00113       EXTERNAL           ALADHD, ALAERH, ALASVM, DERRVX, DGET04, DLACPY,
00114      $                   DLARHS, DLASET, DLATB4, DLATMS, DPOT02, DPOT05,
00115      $                   DSYSV, DSYSVX, DSYT01, DSYTRF, DSYTRI2, XLAENV,
00116      $                   DSYSVXX
00117 *     ..
00118 *     .. Scalars in Common ..
00119       LOGICAL            LERR, OK
00120       CHARACTER*32       SRNAMT
00121       INTEGER            INFOT, NUNIT
00122 *     ..
00123 *     .. Common blocks ..
00124       COMMON             / INFOC / INFOT, NUNIT, OK, LERR
00125       COMMON             / SRNAMC / SRNAMT
00126 *     ..
00127 *     .. Intrinsic Functions ..
00128       INTRINSIC          MAX, MIN
00129 *     ..
00130 *     .. Data statements ..
00131       DATA               ISEEDY / 1988, 1989, 1990, 1991 /
00132       DATA               UPLOS / 'U', 'L' / , FACTS / 'F', 'N' /
00133 *     ..
00134 *     .. Executable Statements ..
00135 *
00136 *     Initialize constants and the random number seed.
00137 *
00138       PATH( 1: 1 ) = 'Double precision'
00139       PATH( 2: 3 ) = 'SY'
00140       NRUN = 0
00141       NFAIL = 0
00142       NERRS = 0
00143       DO 10 I = 1, 4
00144          ISEED( I ) = ISEEDY( I )
00145    10 CONTINUE
00146       LWORK = MAX( 2*NMAX, NMAX*NRHS )
00147 *
00148 *     Test the error exits
00149 *
00150       IF( TSTERR )
00151      $   CALL DERRVX( PATH, NOUT )
00152       INFOT = 0
00153 *
00154 *     Set the block size and minimum block size for testing.
00155 *
00156       NB = 1
00157       NBMIN = 2
00158       CALL XLAENV( 1, NB )
00159       CALL XLAENV( 2, NBMIN )
00160 *
00161 *     Do for each value of N in NVAL
00162 *
00163       DO 180 IN = 1, NN
00164          N = NVAL( IN )
00165          LDA = MAX( N, 1 )
00166          XTYPE = 'N'
00167          NIMAT = NTYPES
00168          IF( N.LE.0 )
00169      $      NIMAT = 1
00170 *
00171          DO 170 IMAT = 1, NIMAT
00172 *
00173 *           Do the tests only if DOTYPE( IMAT ) is true.
00174 *
00175             IF( .NOT.DOTYPE( IMAT ) )
00176      $         GO TO 170
00177 *
00178 *           Skip types 3, 4, 5, or 6 if the matrix size is too small.
00179 *
00180             ZEROT = IMAT.GE.3 .AND. IMAT.LE.6
00181             IF( ZEROT .AND. N.LT.IMAT-2 )
00182      $         GO TO 170
00183 *
00184 *           Do first for UPLO = 'U', then for UPLO = 'L'
00185 *
00186             DO 160 IUPLO = 1, 2
00187                UPLO = UPLOS( IUPLO )
00188 *
00189 *              Set up parameters with DLATB4 and generate a test matrix
00190 *              with DLATMS.
00191 *
00192                CALL DLATB4( PATH, IMAT, N, N, TYPE, KL, KU, ANORM, MODE,
00193      $                      CNDNUM, DIST )
00194 *
00195                SRNAMT = 'DLATMS'
00196                CALL DLATMS( N, N, DIST, ISEED, TYPE, RWORK, MODE,
00197      $                      CNDNUM, ANORM, KL, KU, UPLO, A, LDA, WORK,
00198      $                      INFO )
00199 *
00200 *              Check error code from DLATMS.
00201 *
00202                IF( INFO.NE.0 ) THEN
00203                   CALL ALAERH( PATH, 'DLATMS', INFO, 0, UPLO, N, N, -1,
00204      $                         -1, -1, IMAT, NFAIL, NERRS, NOUT )
00205                   GO TO 160
00206                END IF
00207 *
00208 *              For types 3-6, zero one or more rows and columns of the
00209 *              matrix to test that INFO is returned correctly.
00210 *
00211                IF( ZEROT ) THEN
00212                   IF( IMAT.EQ.3 ) THEN
00213                      IZERO = 1
00214                   ELSE IF( IMAT.EQ.4 ) THEN
00215                      IZERO = N
00216                   ELSE
00217                      IZERO = N / 2 + 1
00218                   END IF
00219 *
00220                   IF( IMAT.LT.6 ) THEN
00221 *
00222 *                    Set row and column IZERO to zero.
00223 *
00224                      IF( IUPLO.EQ.1 ) THEN
00225                         IOFF = ( IZERO-1 )*LDA
00226                         DO 20 I = 1, IZERO - 1
00227                            A( IOFF+I ) = ZERO
00228    20                   CONTINUE
00229                         IOFF = IOFF + IZERO
00230                         DO 30 I = IZERO, N
00231                            A( IOFF ) = ZERO
00232                            IOFF = IOFF + LDA
00233    30                   CONTINUE
00234                      ELSE
00235                         IOFF = IZERO
00236                         DO 40 I = 1, IZERO - 1
00237                            A( IOFF ) = ZERO
00238                            IOFF = IOFF + LDA
00239    40                   CONTINUE
00240                         IOFF = IOFF - IZERO
00241                         DO 50 I = IZERO, N
00242                            A( IOFF+I ) = ZERO
00243    50                   CONTINUE
00244                      END IF
00245                   ELSE
00246                      IOFF = 0
00247                      IF( IUPLO.EQ.1 ) THEN
00248 *
00249 *                       Set the first IZERO rows and columns to zero.
00250 *
00251                         DO 70 J = 1, N
00252                            I2 = MIN( J, IZERO )
00253                            DO 60 I = 1, I2
00254                               A( IOFF+I ) = ZERO
00255    60                      CONTINUE
00256                            IOFF = IOFF + LDA
00257    70                   CONTINUE
00258                      ELSE
00259 *
00260 *                       Set the last IZERO rows and columns to zero.
00261 *
00262                         DO 90 J = 1, N
00263                            I1 = MAX( J, IZERO )
00264                            DO 80 I = I1, N
00265                               A( IOFF+I ) = ZERO
00266    80                      CONTINUE
00267                            IOFF = IOFF + LDA
00268    90                   CONTINUE
00269                      END IF
00270                   END IF
00271                ELSE
00272                   IZERO = 0
00273                END IF
00274 *
00275                DO 150 IFACT = 1, NFACT
00276 *
00277 *                 Do first for FACT = 'F', then for other values.
00278 *
00279                   FACT = FACTS( IFACT )
00280 *
00281 *                 Compute the condition number for comparison with
00282 *                 the value returned by DSYSVX.
00283 *
00284                   IF( ZEROT ) THEN
00285                      IF( IFACT.EQ.1 )
00286      $                  GO TO 150
00287                      RCONDC = ZERO
00288 *
00289                   ELSE IF( IFACT.EQ.1 ) THEN
00290 *
00291 *                    Compute the 1-norm of A.
00292 *
00293                      ANORM = DLANSY( '1', UPLO, N, A, LDA, RWORK )
00294 *
00295 *                    Factor the matrix A.
00296 *
00297                      CALL DLACPY( UPLO, N, N, A, LDA, AFAC, LDA )
00298                      CALL DSYTRF( UPLO, N, AFAC, LDA, IWORK, WORK,
00299      $                            LWORK, INFO )
00300 *
00301 *                    Compute inv(A) and take its norm.
00302 *
00303                      CALL DLACPY( UPLO, N, N, AFAC, LDA, AINV, LDA )
00304                      LWORK = (N+NB+1)*(NB+3)
00305                      CALL DSYTRI2( UPLO, N, AINV, LDA, IWORK, WORK,
00306      $                            LWORK, INFO )
00307                      AINVNM = DLANSY( '1', UPLO, N, AINV, LDA, RWORK )
00308 *
00309 *                    Compute the 1-norm condition number of A.
00310 *
00311                      IF( ANORM.LE.ZERO .OR. AINVNM.LE.ZERO ) THEN
00312                         RCONDC = ONE
00313                      ELSE
00314                         RCONDC = ( ONE / ANORM ) / AINVNM
00315                      END IF
00316                   END IF
00317 *
00318 *                 Form an exact solution and set the right hand side.
00319 *
00320                   SRNAMT = 'DLARHS'
00321                   CALL DLARHS( PATH, XTYPE, UPLO, ' ', N, N, KL, KU,
00322      $                         NRHS, A, LDA, XACT, LDA, B, LDA, ISEED,
00323      $                         INFO )
00324                   XTYPE = 'C'
00325 *
00326 *                 --- Test DSYSV  ---
00327 *
00328                   IF( IFACT.EQ.2 ) THEN
00329                      CALL DLACPY( UPLO, N, N, A, LDA, AFAC, LDA )
00330                      CALL DLACPY( 'Full', N, NRHS, B, LDA, X, LDA )
00331 *
00332 *                    Factor the matrix and solve the system using DSYSV.
00333 *
00334                      SRNAMT = 'DSYSV '
00335                      CALL DSYSV( UPLO, N, NRHS, AFAC, LDA, IWORK, X,
00336      $                           LDA, WORK, LWORK, INFO )
00337 *
00338 *                    Adjust the expected value of INFO to account for
00339 *                    pivoting.
00340 *
00341                      K = IZERO
00342                      IF( K.GT.0 ) THEN
00343   100                   CONTINUE
00344                         IF( IWORK( K ).LT.0 ) THEN
00345                            IF( IWORK( K ).NE.-K ) THEN
00346                               K = -IWORK( K )
00347                               GO TO 100
00348                            END IF
00349                         ELSE IF( IWORK( K ).NE.K ) THEN
00350                            K = IWORK( K )
00351                            GO TO 100
00352                         END IF
00353                      END IF
00354 *
00355 *                    Check error code from DSYSV .
00356 *
00357                      IF( INFO.NE.K ) THEN
00358                         CALL ALAERH( PATH, 'DSYSV ', INFO, K, UPLO, N,
00359      $                               N, -1, -1, NRHS, IMAT, NFAIL,
00360      $                               NERRS, NOUT )
00361                         GO TO 120
00362                      ELSE IF( INFO.NE.0 ) THEN
00363                         GO TO 120
00364                      END IF
00365 *
00366 *                    Reconstruct matrix from factors and compute
00367 *                    residual.
00368 *
00369                      CALL DSYT01( UPLO, N, A, LDA, AFAC, LDA, IWORK,
00370      $                            AINV, LDA, RWORK, RESULT( 1 ) )
00371 *
00372 *                    Compute residual of the computed solution.
00373 *
00374                      CALL DLACPY( 'Full', N, NRHS, B, LDA, WORK, LDA )
00375                      CALL DPOT02( UPLO, N, NRHS, A, LDA, X, LDA, WORK,
00376      $                            LDA, RWORK, RESULT( 2 ) )
00377 *
00378 *                    Check solution from generated exact solution.
00379 *
00380                      CALL DGET04( N, NRHS, X, LDA, XACT, LDA, RCONDC,
00381      $                            RESULT( 3 ) )
00382                      NT = 3
00383 *
00384 *                    Print information about the tests that did not pass
00385 *                    the threshold.
00386 *
00387                      DO 110 K = 1, NT
00388                         IF( RESULT( K ).GE.THRESH ) THEN
00389                            IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
00390      $                        CALL ALADHD( NOUT, PATH )
00391                            WRITE( NOUT, FMT = 9999 )'DSYSV ', UPLO, N,
00392      $                        IMAT, K, RESULT( K )
00393                            NFAIL = NFAIL + 1
00394                         END IF
00395   110                CONTINUE
00396                      NRUN = NRUN + NT
00397   120                CONTINUE
00398                   END IF
00399 *
00400 *                 --- Test DSYSVX ---
00401 *
00402                   IF( IFACT.EQ.2 )
00403      $               CALL DLASET( UPLO, N, N, ZERO, ZERO, AFAC, LDA )
00404                   CALL DLASET( 'Full', N, NRHS, ZERO, ZERO, X, LDA )
00405 *
00406 *                 Solve the system and compute the condition number and
00407 *                 error bounds using DSYSVX.
00408 *
00409                   SRNAMT = 'DSYSVX'
00410                   CALL DSYSVX( FACT, UPLO, N, NRHS, A, LDA, AFAC, LDA,
00411      $                         IWORK, B, LDA, X, LDA, RCOND, RWORK,
00412      $                         RWORK( NRHS+1 ), WORK, LWORK,
00413      $                         IWORK( N+1 ), INFO )
00414 *
00415 *                 Adjust the expected value of INFO to account for
00416 *                 pivoting.
00417 *
00418                   K = IZERO
00419                   IF( K.GT.0 ) THEN
00420   130                CONTINUE
00421                      IF( IWORK( K ).LT.0 ) THEN
00422                         IF( IWORK( K ).NE.-K ) THEN
00423                            K = -IWORK( K )
00424                            GO TO 130
00425                         END IF
00426                      ELSE IF( IWORK( K ).NE.K ) THEN
00427                         K = IWORK( K )
00428                         GO TO 130
00429                      END IF
00430                   END IF
00431 *
00432 *                 Check the error code from DSYSVX.
00433 *
00434                   IF( INFO.NE.K ) THEN
00435                      CALL ALAERH( PATH, 'DSYSVX', INFO, K, FACT // UPLO,
00436      $                            N, N, -1, -1, NRHS, IMAT, NFAIL,
00437      $                            NERRS, NOUT )
00438                      GO TO 150
00439                   END IF
00440 *
00441                   IF( INFO.EQ.0 ) THEN
00442                      IF( IFACT.GE.2 ) THEN
00443 *
00444 *                       Reconstruct matrix from factors and compute
00445 *                       residual.
00446 *
00447                         CALL DSYT01( UPLO, N, A, LDA, AFAC, LDA, IWORK,
00448      $                               AINV, LDA, RWORK( 2*NRHS+1 ),
00449      $                               RESULT( 1 ) )
00450                         K1 = 1
00451                      ELSE
00452                         K1 = 2
00453                      END IF
00454 *
00455 *                    Compute residual of the computed solution.
00456 *
00457                      CALL DLACPY( 'Full', N, NRHS, B, LDA, WORK, LDA )
00458                      CALL DPOT02( UPLO, N, NRHS, A, LDA, X, LDA, WORK,
00459      $                            LDA, RWORK( 2*NRHS+1 ), RESULT( 2 ) )
00460 *
00461 *                    Check solution from generated exact solution.
00462 *
00463                      CALL DGET04( N, NRHS, X, LDA, XACT, LDA, RCONDC,
00464      $                            RESULT( 3 ) )
00465 *
00466 *                    Check the error bounds from iterative refinement.
00467 *
00468                      CALL DPOT05( UPLO, N, NRHS, A, LDA, B, LDA, X, LDA,
00469      $                            XACT, LDA, RWORK, RWORK( NRHS+1 ),
00470      $                            RESULT( 4 ) )
00471                   ELSE
00472                      K1 = 6
00473                   END IF
00474 *
00475 *                 Compare RCOND from DSYSVX with the computed value
00476 *                 in RCONDC.
00477 *
00478                   RESULT( 6 ) = DGET06( RCOND, RCONDC )
00479 *
00480 *                 Print information about the tests that did not pass
00481 *                 the threshold.
00482 *
00483                   DO 140 K = K1, 6
00484                      IF( RESULT( K ).GE.THRESH ) THEN
00485                         IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
00486      $                     CALL ALADHD( NOUT, PATH )
00487                         WRITE( NOUT, FMT = 9998 )'DSYSVX', FACT, UPLO,
00488      $                     N, IMAT, K, RESULT( K )
00489                         NFAIL = NFAIL + 1
00490                      END IF
00491   140             CONTINUE
00492                   NRUN = NRUN + 7 - K1
00493 *
00494 *                 --- Test DSYSVXX ---
00495 *
00496 *                 Restore the matrices A and B.
00497 *
00498                   IF( IFACT.EQ.2 )
00499      $               CALL DLASET( UPLO, N, N, ZERO, ZERO, AFAC, LDA )
00500                   CALL DLASET( 'Full', N, NRHS, ZERO, ZERO, X, LDA )
00501 *
00502 *                 Solve the system and compute the condition number
00503 *                 and error bounds using DSYSVXX.
00504 *
00505                   SRNAMT = 'DSYSVXX'
00506                   N_ERR_BNDS = 3
00507                   EQUED = 'N'
00508                   CALL DSYSVXX( FACT, UPLO, N, NRHS, A, LDA, AFAC,
00509      $                 LDA, IWORK, EQUED, WORK( N+1 ), B, LDA, X,
00510      $                 LDA, RCOND, RPVGRW_SVXX, BERR, N_ERR_BNDS,
00511      $                 ERRBNDS_N, ERRBNDS_C, 0, ZERO, WORK,
00512      $                 IWORK( N+1 ), INFO )
00513 *
00514 *                 Adjust the expected value of INFO to account for
00515 *                 pivoting.
00516 *
00517                   K = IZERO
00518                   IF( K.GT.0 ) THEN
00519  135                 CONTINUE
00520                      IF( IWORK( K ).LT.0 ) THEN
00521                         IF( IWORK( K ).NE.-K ) THEN
00522                            K = -IWORK( K )
00523                            GO TO 135
00524                         END IF
00525                      ELSE IF( IWORK( K ).NE.K ) THEN
00526                         K = IWORK( K )
00527                         GO TO 135
00528                      END IF
00529                   END IF
00530 *
00531 *                 Check the error code from DSYSVXX.
00532 *
00533                   IF( INFO.NE.K ) THEN
00534                      CALL ALAERH( PATH, 'DSYSVXX', INFO, K,
00535      $                    FACT // UPLO, N, N, -1, -1, NRHS, IMAT, NFAIL,
00536      $                    NERRS, NOUT )
00537                      GO TO 150
00538                   END IF
00539 *
00540                   IF( INFO.EQ.0 ) THEN
00541                      IF( IFACT.GE.2 ) THEN
00542 *
00543 *                 Reconstruct matrix from factors and compute
00544 *                 residual.
00545 *
00546                         CALL DSYT01( UPLO, N, A, LDA, AFAC, LDA, IWORK,
00547      $                       AINV, LDA, RWORK(2*NRHS+1),
00548      $                       RESULT( 1 ) )
00549                         K1 = 1
00550                      ELSE
00551                         K1 = 2
00552                      END IF
00553 *
00554 *                 Compute residual of the computed solution.
00555 *
00556                      CALL DLACPY( 'Full', N, NRHS, B, LDA, WORK, LDA )
00557                      CALL DPOT02( UPLO, N, NRHS, A, LDA, X, LDA, WORK,
00558      $                    LDA, RWORK( 2*NRHS+1 ), RESULT( 2 ) )
00559 *
00560 *                 Check solution from generated exact solution.
00561 *
00562                      CALL DGET04( N, NRHS, X, LDA, XACT, LDA, RCONDC,
00563      $                    RESULT( 3 ) )
00564 *
00565 *                 Check the error bounds from iterative refinement.
00566 *
00567                      CALL DPOT05( UPLO, N, NRHS, A, LDA, B, LDA, X, LDA,
00568      $                    XACT, LDA, RWORK, RWORK( NRHS+1 ),
00569      $                    RESULT( 4 ) )
00570                   ELSE
00571                      K1 = 6
00572                   END IF
00573 *
00574 *                 Compare RCOND from DSYSVXX with the computed value
00575 *                 in RCONDC.
00576 *
00577                   RESULT( 6 ) = DGET06( RCOND, RCONDC )
00578 *
00579 *                 Print information about the tests that did not pass
00580 *                 the threshold.
00581 *
00582                   DO 85 K = K1, 6
00583                      IF( RESULT( K ).GE.THRESH ) THEN
00584                         IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
00585      $                       CALL ALADHD( NOUT, PATH )
00586                         WRITE( NOUT, FMT = 9998 )'DSYSVXX',
00587      $                       FACT, UPLO, N, IMAT, K,
00588      $                       RESULT( K )
00589                         NFAIL = NFAIL + 1
00590                      END IF
00591  85               CONTINUE
00592                   NRUN = NRUN + 7 - K1
00593 *
00594   150          CONTINUE
00595 *
00596   160       CONTINUE
00597   170    CONTINUE
00598   180 CONTINUE
00599 *
00600 *     Print a summary of the results.
00601 *
00602       CALL ALASVM( PATH, NOUT, NFAIL, NRUN, NERRS )
00603 *
00604 
00605 *     Test Error Bounds from DSYSVXX
00606 
00607       CALL DEBCHVXX(THRESH, PATH)
00608 
00609  9999 FORMAT( 1X, A, ', UPLO=''', A1, ''', N =', I5, ', type ', I2,
00610      $      ', test ', I2, ', ratio =', G12.5 )
00611  9998 FORMAT( 1X, A, ', FACT=''', A1, ''', UPLO=''', A1, ''', N =', I5,
00612      $      ', type ', I2, ', test ', I2, ', ratio =', G12.5 )
00613       RETURN
00614 *
00615 *     End of DDRVSY
00616 *
00617       END