SUBROUTINE CCKGSV( NM, MVAL, PVAL, NVAL, NMATS, ISEED, THRESH, $ NMAX, A, AF, B, BF, U, V, Q, ALPHA, BETA, R, $ IWORK, WORK, RWORK, NIN, NOUT, INFO ) * * -- LAPACK test routine (version 3.1) -- * Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. * November 2006 * * .. Scalar Arguments .. INTEGER INFO, NIN, NM, NMATS, NMAX, NOUT REAL THRESH * .. * .. Array Arguments .. INTEGER ISEED( 4 ), IWORK( * ), MVAL( * ), NVAL( * ), $ PVAL( * ) REAL ALPHA( * ), BETA( * ), RWORK( * ) COMPLEX A( * ), AF( * ), B( * ), BF( * ), Q( * ), $ R( * ), U( * ), V( * ), WORK( * ) * .. * * Purpose * ======= * * CCKGSV tests CGGSVD: * the GSVD for M-by-N matrix A and P-by-N matrix B. * * Arguments * ========= * * 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. * * PVAL (input) INTEGER array, dimension (NP) * The values of the matrix row dimension P. * * NVAL (input) INTEGER array, dimension (NN) * The values of the matrix column dimension N. * * NMATS (input) INTEGER * The number of matrix types to be tested for each combination * of matrix dimensions. If NMATS >= NTYPES (the maximum * number of matrix types), then all the different types are * generated for testing. If NMATS < NTYPES, another input line * is read to get the numbers of the matrix types to be used. * * ISEED (input/output) INTEGER array, dimension (4) * On entry, the seed of the random number generator. The array * elements should be between 0 and 4095, otherwise they will be * reduced mod 4096, and ISEED(4) must be odd. * On exit, the next seed in the random number sequence after * all the test matrices have been generated. * * THRESH (input) REAL * 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. * * NMAX (input) INTEGER * The maximum value permitted for M or N, used in dimensioning * the work arrays. * * A (workspace) COMPLEX array, dimension (NMAX*NMAX) * * AF (workspace) COMPLEX array, dimension (NMAX*NMAX) * * B (workspace) COMPLEX array, dimension (NMAX*NMAX) * * BF (workspace) COMPLEX array, dimension (NMAX*NMAX) * * U (workspace) COMPLEX array, dimension (NMAX*NMAX) * * V (workspace) COMPLEX array, dimension (NMAX*NMAX) * * Q (workspace) COMPLEX array, dimension (NMAX*NMAX) * * ALPHA (workspace) REAL array, dimension (NMAX) * * BETA (workspace) REAL array, dimension (NMAX) * * R (workspace) COMPLEX array, dimension (NMAX*NMAX) * * IWORK (workspace) INTEGER array, dimension (NMAX) * * WORK (workspace) COMPLEX array, dimension (NMAX*NMAX) * * RWORK (workspace) REAL array, dimension (NMAX) * * NIN (input) INTEGER * The unit number for input. * * NOUT (input) INTEGER * The unit number for output. * * INFO (output) INTEGER * = 0 : successful exit * > 0 : If CLATMS returns an error code, the absolute value * of it is returned. * * ===================================================================== * * .. Parameters .. INTEGER NTESTS PARAMETER ( NTESTS = 7 ) INTEGER NTYPES PARAMETER ( NTYPES = 8 ) * .. * .. Local Scalars .. LOGICAL FIRSTT CHARACTER DISTA, DISTB, TYPE CHARACTER*3 PATH INTEGER I, IINFO, IM, IMAT, KLA, KLB, KUA, KUB, LDA, $ LDB, LDQ, LDR, LDU, LDV, LWORK, M, MODEA, $ MODEB, N, NFAIL, NRUN, NT, P REAL ANORM, BNORM, CNDNMA, CNDNMB * .. * .. Local Arrays .. LOGICAL DOTYPE( NTYPES ) REAL RESULT( NTESTS ) * .. * .. External Subroutines .. EXTERNAL ALAHDG, ALAREQ, ALASUM, CGSVTS, CLATMS, SLATB9 * .. * .. Intrinsic Functions .. INTRINSIC ABS * .. * .. Executable Statements .. * * Initialize constants and the random number seed. * PATH( 1: 3 ) = 'GSV' INFO = 0 NRUN = 0 NFAIL = 0 FIRSTT = .TRUE. CALL ALAREQ( PATH, NMATS, DOTYPE, NTYPES, NIN, NOUT ) LDA = NMAX LDB = NMAX LDU = NMAX LDV = NMAX LDQ = NMAX LDR = NMAX LWORK = NMAX*NMAX * * Do for each value of M in MVAL. * DO 30 IM = 1, NM M = MVAL( IM ) P = PVAL( IM ) N = NVAL( IM ) * DO 20 IMAT = 1, NTYPES * * Do the tests only if DOTYPE( IMAT ) is true. * IF( .NOT.DOTYPE( IMAT ) ) $ GO TO 20 * * Set up parameters with SLATB9 and generate test * matrices A and B with CLATMS. * CALL SLATB9( PATH, IMAT, M, P, N, TYPE, KLA, KUA, KLB, KUB, $ ANORM, BNORM, MODEA, MODEB, CNDNMA, CNDNMB, $ DISTA, DISTB ) * * Generate M by N matrix A * CALL CLATMS( M, N, DISTA, ISEED, TYPE, RWORK, MODEA, CNDNMA, $ ANORM, KLA, KUA, 'No packing', A, LDA, WORK, $ IINFO ) IF( IINFO.NE.0 ) THEN WRITE( NOUT, FMT = 9999 )IINFO INFO = ABS( IINFO ) GO TO 20 END IF * * Generate P by N matrix B * CALL CLATMS( P, N, DISTB, ISEED, TYPE, RWORK, MODEB, CNDNMB, $ BNORM, KLB, KUB, 'No packing', B, LDB, WORK, $ IINFO ) IF( IINFO.NE.0 ) THEN WRITE( NOUT, FMT = 9999 )IINFO INFO = ABS( IINFO ) GO TO 20 END IF * NT = 6 * CALL CGSVTS( M, P, N, A, AF, LDA, B, BF, LDB, U, LDU, V, $ LDV, Q, LDQ, ALPHA, BETA, R, LDR, IWORK, WORK, $ LWORK, RWORK, RESULT ) * * Print information about the tests that did not * pass the threshold. * DO 10 I = 1, NT IF( RESULT( I ).GE.THRESH ) THEN IF( NFAIL.EQ.0 .AND. FIRSTT ) THEN FIRSTT = .FALSE. CALL ALAHDG( NOUT, PATH ) END IF WRITE( NOUT, FMT = 9998 )M, P, N, IMAT, I, $ RESULT( I ) NFAIL = NFAIL + 1 END IF 10 CONTINUE NRUN = NRUN + NT * 20 CONTINUE 30 CONTINUE * * Print a summary of the results. * CALL ALASUM( PATH, NOUT, NFAIL, NRUN, 0 ) * 9999 FORMAT( ' CLATMS in CCKGSV INFO = ', I5 ) 9998 FORMAT( ' M=', I4, ' P=', I4, ', N=', I4, ', type ', I2, $ ', test ', I2, ', ratio=', G13.6 ) RETURN * * End of CCKGSV * END