 LAPACK 3.11.0 LAPACK: Linear Algebra PACKage
Searching...
No Matches

## ◆ dckgsv()

 subroutine dckgsv ( integer NM, integer, dimension( * ) MVAL, integer, dimension( * ) PVAL, integer, dimension( * ) NVAL, integer NMATS, integer, dimension( 4 ) ISEED, double precision THRESH, integer NMAX, double precision, dimension( * ) A, double precision, dimension( * ) AF, double precision, dimension( * ) B, double precision, dimension( * ) BF, double precision, dimension( * ) U, double precision, dimension( * ) V, double precision, dimension( * ) Q, double precision, dimension( * ) ALPHA, double precision, dimension( * ) BETA, double precision, dimension( * ) R, integer, dimension( * ) IWORK, double precision, dimension( * ) WORK, double precision, dimension( * ) RWORK, integer NIN, integer NOUT, integer INFO )

DCKGSV

Purpose:
``` DCKGSV tests DGGSVD:
the GSVD for M-by-N matrix A and P-by-N matrix B.```
Parameters
 [in] NM ``` NM is INTEGER The number of values of M contained in the vector MVAL.``` [in] MVAL ``` MVAL is INTEGER array, dimension (NM) The values of the matrix row dimension M.``` [in] PVAL ``` PVAL is INTEGER array, dimension (NP) The values of the matrix row dimension P.``` [in] NVAL ``` NVAL is INTEGER array, dimension (NN) The values of the matrix column dimension N.``` [in] NMATS ``` NMATS is 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.``` [in,out] ISEED ``` ISEED is 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.``` [in] THRESH ``` THRESH is 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.``` [in] NMAX ``` NMAX is INTEGER The maximum value permitted for M or N, used in dimensioning the work arrays.``` [out] A ` A is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] AF ` AF is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] B ` B is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] BF ` BF is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] U ` U is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] V ` V is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] Q ` Q is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] ALPHA ` ALPHA is DOUBLE PRECISION array, dimension (NMAX)` [out] BETA ` BETA is DOUBLE PRECISION array, dimension (NMAX)` [out] R ` R is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] IWORK ` IWORK is INTEGER array, dimension (NMAX)` [out] WORK ` WORK is DOUBLE PRECISION array, dimension (NMAX*NMAX)` [out] RWORK ` RWORK is DOUBLE PRECISION array, dimension (NMAX)` [in] NIN ``` NIN is INTEGER The unit number for input.``` [in] NOUT ``` NOUT is INTEGER The unit number for output.``` [out] INFO ``` INFO is INTEGER = 0 : successful exit > 0 : If DLATMS returns an error code, the absolute value of it is returned.```

Definition at line 195 of file dckgsv.f.

198*
199* -- LAPACK test routine --
200* -- LAPACK is a software package provided by Univ. of Tennessee, --
201* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
202*
203* .. Scalar Arguments ..
204 INTEGER INFO, NIN, NM, NMATS, NMAX, NOUT
205 DOUBLE PRECISION THRESH
206* ..
207* .. Array Arguments ..
208 INTEGER ISEED( 4 ), IWORK( * ), MVAL( * ), NVAL( * ),
209 \$ PVAL( * )
210 DOUBLE PRECISION A( * ), AF( * ), ALPHA( * ), B( * ), BETA( * ),
211 \$ BF( * ), Q( * ), R( * ), RWORK( * ), U( * ),
212 \$ V( * ), WORK( * )
213* ..
214*
215* =====================================================================
216*
217* .. Parameters ..
218 INTEGER NTESTS
219 parameter( ntests = 12 )
220 INTEGER NTYPES
221 parameter( ntypes = 8 )
222* ..
223* .. Local Scalars ..
224 LOGICAL FIRSTT
225 CHARACTER DISTA, DISTB, TYPE
226 CHARACTER*3 PATH
227 INTEGER I, IINFO, IM, IMAT, KLA, KLB, KUA, KUB, LDA,
228 \$ LDB, LDQ, LDR, LDU, LDV, LWORK, M, MODEA,
229 \$ MODEB, N, NFAIL, NRUN, NT, P
230 DOUBLE PRECISION ANORM, BNORM, CNDNMA, CNDNMB
231* ..
232* .. Local Arrays ..
233 LOGICAL DOTYPE( NTYPES )
234 DOUBLE PRECISION RESULT( NTESTS )
235* ..
236* .. External Subroutines ..
238* ..
239* .. Intrinsic Functions ..
240 INTRINSIC abs
241* ..
242* .. Executable Statements ..
243*
244* Initialize constants and the random number seed.
245*
246 path( 1: 3 ) = 'GSV'
247 info = 0
248 nrun = 0
249 nfail = 0
250 firstt = .true.
251 CALL alareq( path, nmats, dotype, ntypes, nin, nout )
252 lda = nmax
253 ldb = nmax
254 ldu = nmax
255 ldv = nmax
256 ldq = nmax
257 ldr = nmax
258 lwork = nmax*nmax
259*
260* Do for each value of M in MVAL.
261*
262 DO 30 im = 1, nm
263 m = mval( im )
264 p = pval( im )
265 n = nval( im )
266*
267 DO 20 imat = 1, ntypes
268*
269* Do the tests only if DOTYPE( IMAT ) is true.
270*
271 IF( .NOT.dotype( imat ) )
272 \$ GO TO 20
273*
274* Set up parameters with DLATB9 and generate test
275* matrices A and B with DLATMS.
276*
277 CALL dlatb9( path, imat, m, p, n, TYPE, KLA, KUA, KLB, KUB,
278 \$ ANORM, BNORM, MODEA, MODEB, CNDNMA, CNDNMB,
279 \$ DISTA, DISTB )
280*
281* Generate M by N matrix A
282*
283 CALL dlatms( m, n, dista, iseed, TYPE, RWORK, MODEA, CNDNMA,
284 \$ ANORM, KLA, KUA, 'No packing', A, LDA, WORK,
285 \$ IINFO )
286 IF( iinfo.NE.0 ) THEN
287 WRITE( nout, fmt = 9999 )iinfo
288 info = abs( iinfo )
289 GO TO 20
290 END IF
291*
292 CALL dlatms( p, n, distb, iseed, TYPE, RWORK, MODEB, CNDNMB,
293 \$ BNORM, KLB, KUB, 'No packing', B, LDB, WORK,
294 \$ IINFO )
295 IF( iinfo.NE.0 ) THEN
296 WRITE( nout, fmt = 9999 )iinfo
297 info = abs( iinfo )
298 GO TO 20
299 END IF
300*
301 nt = 6
302*
303 CALL dgsvts3( m, p, n, a, af, lda, b, bf, ldb, u, ldu, v,
304 \$ ldv, q, ldq, alpha, beta, r, ldr, iwork, work,
305 \$ lwork, rwork, result )
306*
307* Print information about the tests that did not
308* pass the threshold.
309*
310 DO 10 i = 1, nt
311 IF( result( i ).GE.thresh ) THEN
312 IF( nfail.EQ.0 .AND. firstt ) THEN
313 firstt = .false.
314 CALL alahdg( nout, path )
315 END IF
316 WRITE( nout, fmt = 9998 )m, p, n, imat, i,
317 \$ result( i )
318 nfail = nfail + 1
319 END IF
320 10 CONTINUE
321 nrun = nrun + nt
322 20 CONTINUE
323 30 CONTINUE
324*
325* Print a summary of the results.
326*
327 CALL alasum( path, nout, nfail, nrun, 0 )
328*
329 9999 FORMAT( ' DLATMS in DCKGSV INFO = ', i5 )
330 9998 FORMAT( ' M=', i4, ' P=', i4, ', N=', i4, ', type ', i2,
331 \$ ', test ', i2, ', ratio=', g13.6 )
332 RETURN
333*
334* End of DCKGSV
335*
subroutine alareq(PATH, NMATS, DOTYPE, NTYPES, NIN, NOUT)
ALAREQ
Definition: alareq.f:90
subroutine alahdg(IOUNIT, PATH)
ALAHDG
Definition: alahdg.f:62
subroutine alasum(TYPE, NOUT, NFAIL, NRUN, NERRS)
ALASUM
Definition: alasum.f:73
subroutine dgsvts3(M, P, N, A, AF, LDA, B, BF, LDB, U, LDU, V, LDV, Q, LDQ, ALPHA, BETA, R, LDR, IWORK, WORK, LWORK, RWORK, RESULT)
DGSVTS3
Definition: dgsvts3.f:210
subroutine dlatb9(PATH, IMAT, M, P, N, TYPE, KLA, KUA, KLB, KUB, ANORM, BNORM, MODEA, MODEB, CNDNMA, CNDNMB, DISTA, DISTB)
DLATB9
Definition: dlatb9.f:170
subroutine dlatms(M, N, DIST, ISEED, SYM, D, MODE, COND, DMAX, KL, KU, PACK, A, LDA, WORK, INFO)
DLATMS
Definition: dlatms.f:321
Here is the call graph for this function:
Here is the caller graph for this function: