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SUBROUTINE DCHKPS( DOTYPE, NN, NVAL, NNB, NBVAL, NRANK, RANKVAL,
$ THRESH, TSTERR, NMAX, A, AFAC, PERM, PIV, WORK, $ RWORK, NOUT ) * * -- LAPACK test routine (version 3.1) -- * Craig Lucas, University of Manchester / NAG Ltd. * October, 2008 * * .. Scalar Arguments .. DOUBLE PRECISION THRESH INTEGER NMAX, NN, NNB, NOUT, NRANK LOGICAL TSTERR * .. * .. Array Arguments .. DOUBLE PRECISION A( * ), AFAC( * ), PERM( * ), RWORK( * ), $ WORK( * ) INTEGER NBVAL( * ), NVAL( * ), PIV( * ), RANKVAL( * ) LOGICAL DOTYPE( * ) * .. * * Purpose * ======= * * DCHKPS tests DPSTRF. * * Arguments * ========= * * DOTYPE (input) LOGICAL array, dimension (NTYPES) * The matrix types to be used for testing. Matrices of type j * (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) = * .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used. * * NN (input) INTEGER * The number of values of N contained in the vector NVAL. * * NVAL (input) INTEGER array, dimension (NN) * The values of the matrix dimension N. * * NNB (input) INTEGER * The number of values of NB contained in the vector NBVAL. * * NBVAL (input) INTEGER array, dimension (NBVAL) * The values of the block size NB. * * NRANK (input) INTEGER * The number of values of RANK contained in the vector RANKVAL. * * RANKVAL (input) INTEGER array, dimension (NBVAL) * The values of the block size NB. * * THRESH (input) DOUBLE PRECISION * The threshold value for the test ratios. A result is * included in the output file if RESULT >= THRESH. To have * every test ratio printed, use THRESH = 0. * * TSTERR (input) LOGICAL * Flag that indicates whether error exits are to be tested. * * NMAX (input) INTEGER * The maximum value permitted for N, used in dimensioning the * work arrays. * * A (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX) * * AFAC (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX) * * PERM (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX) * * PIV (workspace) INTEGER array, dimension (NMAX) * * WORK (workspace) DOUBLE PRECISION array, dimension (NMAX*3) * * RWORK (workspace) DOUBLE PRECISION array, dimension (NMAX) * * NOUT (input) INTEGER * The unit number for output. * * ===================================================================== * * .. Parameters .. DOUBLE PRECISION ONE PARAMETER ( ONE = 1.0D+0 ) INTEGER NTYPES PARAMETER ( NTYPES = 9 ) * .. * .. Local Scalars .. DOUBLE PRECISION ANORM, CNDNUM, RESULT, TOL INTEGER COMPRANK, I, IMAT, IN, INB, INFO, IRANK, IUPLO, $ IZERO, KL, KU, LDA, MODE, N, NB, NERRS, NFAIL, $ NIMAT, NRUN, RANK, RANKDIFF CHARACTER DIST, TYPE, UPLO CHARACTER*3 PATH * .. * .. Local Arrays .. INTEGER ISEED( 4 ), ISEEDY( 4 ) CHARACTER UPLOS( 2 ) * .. * .. External Subroutines .. EXTERNAL ALAERH, ALAHD, ALASUM, DERRPS, DLACPY, DLATB5, $ DLATMT, DPST01, DPSTRF, XLAENV * .. * .. Scalars in Common .. INTEGER INFOT, NUNIT LOGICAL LERR, OK CHARACTER*32 SRNAMT * .. * .. Common blocks .. COMMON / INFOC / INFOT, NUNIT, OK, LERR COMMON / SRNAMC / SRNAMT * .. * .. Intrinsic Functions .. INTRINSIC DBLE, MAX, CEILING * .. * .. Data statements .. DATA ISEEDY / 1988, 1989, 1990, 1991 / DATA UPLOS / 'U', 'L' / * .. * .. Executable Statements .. * * Initialize constants and the random number seed. * PATH( 1: 1 ) = 'Double precision' PATH( 2: 3 ) = 'PS' NRUN = 0 NFAIL = 0 NERRS = 0 DO 100 I = 1, 4 ISEED( I ) = ISEEDY( I ) 100 CONTINUE * * Test the error exits * IF( TSTERR ) $ CALL DERRPS( PATH, NOUT ) INFOT = 0 CALL XLAENV( 2, 2 ) * * Do for each value of N in NVAL * DO 150 IN = 1, NN N = NVAL( IN ) LDA = MAX( N, 1 ) NIMAT = NTYPES IF( N.LE.0 ) $ NIMAT = 1 * IZERO = 0 DO 140 IMAT = 1, NIMAT * * Do the tests only if DOTYPE( IMAT ) is true. * IF( .NOT.DOTYPE( IMAT ) ) $ GO TO 140 * * Do for each value of RANK in RANKVAL * DO 130 IRANK = 1, NRANK * * Only repeat test 3 to 5 for different ranks * Other tests use full rank * IF( ( IMAT.LT.3 .OR. IMAT.GT.5 ) .AND. IRANK.GT.1 ) $ GO TO 130 * RANK = CEILING( ( N * DBLE( RANKVAL( IRANK ) ) ) $ / 100.D+0 ) * * * Do first for UPLO = 'U', then for UPLO = 'L' * DO 120 IUPLO = 1, 2 UPLO = UPLOS( IUPLO ) * * Set up parameters with DLATB5 and generate a test matrix * with DLATMT. * CALL DLATB5( PATH, IMAT, N, TYPE, KL, KU, ANORM, $ MODE, CNDNUM, DIST ) * SRNAMT = 'DLATMT' CALL DLATMT( N, N, DIST, ISEED, TYPE, RWORK, MODE, $ CNDNUM, ANORM, RANK, KL, KU, UPLO, A, $ LDA, WORK, INFO ) * * Check error code from DLATMT. * IF( INFO.NE.0 ) THEN CALL ALAERH( PATH, 'DLATMT', INFO, 0, UPLO, N, $ N, -1, -1, -1, IMAT, NFAIL, NERRS, $ NOUT ) GO TO 120 END IF * * Do for each value of NB in NBVAL * DO 110 INB = 1, NNB NB = NBVAL( INB ) CALL XLAENV( 1, NB ) * * Compute the pivoted L*L' or U'*U factorization * of the matrix. * CALL DLACPY( UPLO, N, N, A, LDA, AFAC, LDA ) SRNAMT = 'DPSTRF' * * Use default tolerance * TOL = -ONE CALL DPSTRF( UPLO, N, AFAC, LDA, PIV, COMPRANK, $ TOL, WORK, INFO ) * * Check error code from DPSTRF. * IF( (INFO.LT.IZERO) $ .OR.(INFO.NE.IZERO.AND.RANK.EQ.N) $ .OR.(INFO.LE.IZERO.AND.RANK.LT.N) ) THEN CALL ALAERH( PATH, 'DPSTRF', INFO, IZERO, $ UPLO, N, N, -1, -1, NB, IMAT, $ NFAIL, NERRS, NOUT ) GO TO 110 END IF * * Skip the test if INFO is not 0. * IF( INFO.NE.0 ) $ GO TO 110 * * Reconstruct matrix from factors and compute residual. * * PERM holds permuted L*L^T or U^T*U * CALL DPST01( UPLO, N, A, LDA, AFAC, LDA, PERM, LDA, $ PIV, RWORK, RESULT, COMPRANK ) * * Print information about the tests that did not pass * the threshold or where computed rank was not RANK. * IF( N.EQ.0 ) $ COMPRANK = 0 RANKDIFF = RANK - COMPRANK IF( RESULT.GE.THRESH ) THEN IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 ) $ CALL ALAHD( NOUT, PATH ) WRITE( NOUT, FMT = 9999 )UPLO, N, RANK, $ RANKDIFF, NB, IMAT, RESULT NFAIL = NFAIL + 1 END IF NRUN = NRUN + 1 110 CONTINUE * 120 CONTINUE 130 CONTINUE 140 CONTINUE 150 CONTINUE * * Print a summary of the results. * CALL ALASUM( PATH, NOUT, NFAIL, NRUN, NERRS ) * 9999 FORMAT( ' UPLO = ''', A1, ''', N =', I5, ', RANK =', I3, $ ', Diff =', I5, ', NB =', I4, ', type ', I2, ', Ratio =', $ G12.5 ) RETURN * * End of DCHKPS * END |