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SUBROUTINE DCHKQR( DOTYPE, NM, MVAL, NN, NVAL, NNB, NBVAL, NXVAL,
$ NRHS, THRESH, TSTERR, NMAX, A, AF, AQ, AR, AC,
$ B, X, XACT, TAU, WORK, RWORK, IWORK, NOUT )
*
* -- LAPACK test routine (version 3.1) --
* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
* November 2006
*
* .. Scalar Arguments ..
LOGICAL TSTERR
INTEGER NM, NMAX, NN, NNB, NOUT, NRHS
DOUBLE PRECISION THRESH
* ..
* .. Array Arguments ..
LOGICAL DOTYPE( * )
INTEGER IWORK( * ), MVAL( * ), NBVAL( * ), NVAL( * ),
$ NXVAL( * )
DOUBLE PRECISION A( * ), AC( * ), AF( * ), AQ( * ), AR( * ),
$ B( * ), RWORK( * ), TAU( * ), WORK( * ),
$ X( * ), XACT( * )
* ..
*
* Purpose
* =======
*
* DCHKQR tests DGEQRF, DORGQR and DORMQR.
*
* 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.
*
* NM (input) INTEGER
* The number of values of M contained in the vector MVAL.
*
* MVAL (input) INTEGER array, dimension (NM)
* The values of the matrix row dimension M.
*
* 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 column dimension N.
*
* NNB (input) INTEGER
* The number of values of NB and NX contained in the
* vectors NBVAL and NXVAL. The blocking parameters are used
* in pairs (NB,NX).
*
* NBVAL (input) INTEGER array, dimension (NNB)
* The values of the blocksize NB.
*
* NXVAL (input) INTEGER array, dimension (NNB)
* The values of the crossover point NX.
*
* NRHS (input) INTEGER
* The number of right hand side vectors to be generated for
* each linear system.
*
* 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 M or N, used in dimensioning
* the work arrays.
*
* A (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
*
* AF (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
*
* AQ (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
*
* AR (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
*
* AC (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
*
* B (workspace) DOUBLE PRECISION array, dimension (NMAX*NRHS)
*
* X (workspace) DOUBLE PRECISION array, dimension (NMAX*NRHS)
*
* XACT (workspace) DOUBLE PRECISION array, dimension (NMAX*NRHS)
*
* TAU (workspace) DOUBLE PRECISION array, dimension (NMAX)
*
* WORK (workspace) DOUBLE PRECISION array, dimension (NMAX*NMAX)
*
* RWORK (workspace) DOUBLE PRECISION array, dimension (NMAX)
*
* IWORK (workspace) INTEGER array, dimension (NMAX)
*
* NOUT (input) INTEGER
* The unit number for output.
*
* =====================================================================
*
* .. Parameters ..
INTEGER NTESTS
PARAMETER ( NTESTS = 8 )
INTEGER NTYPES
PARAMETER ( NTYPES = 8 )
DOUBLE PRECISION ZERO
PARAMETER ( ZERO = 0.0D0 )
* ..
* .. Local Scalars ..
CHARACTER DIST, TYPE
CHARACTER*3 PATH
INTEGER I, IK, IM, IMAT, IN, INB, INFO, K, KL, KU, LDA,
$ LWORK, M, MINMN, MODE, N, NB, NERRS, NFAIL, NK,
$ NRUN, NT, NX
DOUBLE PRECISION ANORM, CNDNUM
* ..
* .. Local Arrays ..
INTEGER ISEED( 4 ), ISEEDY( 4 ), KVAL( 4 )
DOUBLE PRECISION RESULT( NTESTS )
* ..
* .. External Functions ..
LOGICAL DGENND
EXTERNAL DGENND
* ..
* .. External Subroutines ..
EXTERNAL ALAERH, ALAHD, ALASUM, DERRQR, DGEQRS, DGET02,
$ DLACPY, DLARHS, DLATB4, DLATMS, DQRT01, DQRT02,
$ DQRT03, XLAENV
* ..
* .. Intrinsic Functions ..
INTRINSIC MAX, MIN
* ..
* .. Scalars in Common ..
LOGICAL LERR, OK
CHARACTER*32 SRNAMT
INTEGER INFOT, NUNIT
* ..
* .. Common blocks ..
COMMON / INFOC / INFOT, NUNIT, OK, LERR
COMMON / SRNAMC / SRNAMT
* ..
* .. Data statements ..
DATA ISEEDY / 1988, 1989, 1990, 1991 /
* ..
* .. Executable Statements ..
*
* Initialize constants and the random number seed.
*
PATH( 1: 1 ) = 'Double precision'
PATH( 2: 3 ) = 'QR'
NRUN = 0
NFAIL = 0
NERRS = 0
DO 10 I = 1, 4
ISEED( I ) = ISEEDY( I )
10 CONTINUE
*
* Test the error exits
*
IF( TSTERR )
$ CALL DERRQR( PATH, NOUT )
INFOT = 0
CALL XLAENV( 2, 2 )
*
LDA = NMAX
LWORK = NMAX*MAX( NMAX, NRHS )
*
* Do for each value of M in MVAL.
*
DO 70 IM = 1, NM
M = MVAL( IM )
*
* Do for each value of N in NVAL.
*
DO 60 IN = 1, NN
N = NVAL( IN )
MINMN = MIN( M, N )
DO 50 IMAT = 1, NTYPES
*
* Do the tests only if DOTYPE( IMAT ) is true.
*
IF( .NOT.DOTYPE( IMAT ) )
$ GO TO 50
*
* Set up parameters with DLATB4 and generate a test matrix
* with DLATMS.
*
CALL DLATB4( PATH, IMAT, M, N, TYPE, KL, KU, ANORM, MODE,
$ CNDNUM, DIST )
*
SRNAMT = 'DLATMS'
CALL DLATMS( M, N, DIST, ISEED, TYPE, RWORK, MODE,
$ CNDNUM, ANORM, KL, KU, 'No packing', A, LDA,
$ WORK, INFO )
*
* Check error code from DLATMS.
*
IF( INFO.NE.0 ) THEN
CALL ALAERH( PATH, 'DLATMS', INFO, 0, ' ', M, N, -1,
$ -1, -1, IMAT, NFAIL, NERRS, NOUT )
GO TO 50
END IF
*
* Set some values for K: the first value must be MINMN,
* corresponding to the call of DQRT01; other values are
* used in the calls of DQRT02, and must not exceed MINMN.
*
KVAL( 1 ) = MINMN
KVAL( 2 ) = 0
KVAL( 3 ) = 1
KVAL( 4 ) = MINMN / 2
IF( MINMN.EQ.0 ) THEN
NK = 1
ELSE IF( MINMN.EQ.1 ) THEN
NK = 2
ELSE IF( MINMN.LE.3 ) THEN
NK = 3
ELSE
NK = 4
END IF
*
* Do for each value of K in KVAL
*
DO 40 IK = 1, NK
K = KVAL( IK )
*
* Do for each pair of values (NB,NX) in NBVAL and NXVAL.
*
DO 30 INB = 1, NNB
NB = NBVAL( INB )
CALL XLAENV( 1, NB )
NX = NXVAL( INB )
CALL XLAENV( 3, NX )
DO I = 1, NTESTS
RESULT( I ) = ZERO
END DO
NT = 2
IF( IK.EQ.1 ) THEN
*
* Test DGEQRF
*
CALL DQRT01( M, N, A, AF, AQ, AR, LDA, TAU,
$ WORK, LWORK, RWORK, RESULT( 1 ) )
IF( .NOT.DGENND( M, N, AF, LDA ) )
$ RESULT( 8 ) = 2*THRESH
NT = NT + 1
ELSE IF( M.GE.N ) THEN
*
* Test DORGQR, using factorization
* returned by DQRT01
*
CALL DQRT02( M, N, K, A, AF, AQ, AR, LDA, TAU,
$ WORK, LWORK, RWORK, RESULT( 1 ) )
END IF
IF( M.GE.K ) THEN
*
* Test DORMQR, using factorization returned
* by DQRT01
*
CALL DQRT03( M, N, K, AF, AC, AR, AQ, LDA, TAU,
$ WORK, LWORK, RWORK, RESULT( 3 ) )
NT = NT + 4
*
* If M>=N and K=N, call DGEQRS to solve a system
* with NRHS right hand sides and compute the
* residual.
*
IF( K.EQ.N .AND. INB.EQ.1 ) THEN
*
* Generate a solution and set the right
* hand side.
*
SRNAMT = 'DLARHS'
CALL DLARHS( PATH, 'New', 'Full',
$ 'No transpose', M, N, 0, 0,
$ NRHS, A, LDA, XACT, LDA, B, LDA,
$ ISEED, INFO )
*
CALL DLACPY( 'Full', M, NRHS, B, LDA, X,
$ LDA )
SRNAMT = 'DGEQRS'
CALL DGEQRS( M, N, NRHS, AF, LDA, TAU, X,
$ LDA, WORK, LWORK, INFO )
*
* Check error code from DGEQRS.
*
IF( INFO.NE.0 )
$ CALL ALAERH( PATH, 'DGEQRS', INFO, 0, ' ',
$ M, N, NRHS, -1, NB, IMAT,
$ NFAIL, NERRS, NOUT )
*
CALL DGET02( 'No transpose', M, N, NRHS, A,
$ LDA, X, LDA, B, LDA, RWORK,
$ RESULT( 7 ) )
NT = NT + 1
END IF
END IF
*
* Print information about the tests that did not
* pass the threshold.
*
DO 20 I = 1, NT
IF( RESULT( I ).GE.THRESH ) THEN
IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
$ CALL ALAHD( NOUT, PATH )
WRITE( NOUT, FMT = 9999 )M, N, K, NB, NX,
$ IMAT, I, RESULT( I )
NFAIL = NFAIL + 1
END IF
20 CONTINUE
NRUN = NRUN + NT
30 CONTINUE
40 CONTINUE
50 CONTINUE
60 CONTINUE
70 CONTINUE
*
* Print a summary of the results.
*
CALL ALASUM( PATH, NOUT, NFAIL, NRUN, NERRS )
*
9999 FORMAT( ' M=', I5, ', N=', I5, ', K=', I5, ', NB=', I4, ', NX=',
$ I5, ', type ', I2, ', test(', I2, ')=', G12.5 )
RETURN
*
* End of DCHKQR
*
END
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