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LAPACK 3.3.1
Linear Algebra PACKage
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LAPACK 3.3.1
Linear Algebra PACKage
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00001 SUBROUTINE ZCHKSP( DOTYPE, NN, NVAL, NNS, NSVAL, THRESH, TSTERR, 00002 $ NMAX, A, AFAC, AINV, B, X, XACT, WORK, RWORK, 00003 $ IWORK, NOUT ) 00004 * 00005 * -- LAPACK test routine (version 3.1) -- 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, NNS, NOUT 00012 DOUBLE PRECISION THRESH 00013 * .. 00014 * .. Array Arguments .. 00015 LOGICAL DOTYPE( * ) 00016 INTEGER IWORK( * ), NSVAL( * ), NVAL( * ) 00017 DOUBLE PRECISION RWORK( * ) 00018 COMPLEX*16 A( * ), AFAC( * ), AINV( * ), B( * ), 00019 $ WORK( * ), X( * ), XACT( * ) 00020 * .. 00021 * 00022 * Purpose 00023 * ======= 00024 * 00025 * ZCHKSP tests ZSPTRF, -TRI, -TRS, -RFS, and -CON 00026 * 00027 * Arguments 00028 * ========= 00029 * 00030 * DOTYPE (input) LOGICAL array, dimension (NTYPES) 00031 * The matrix types to be used for testing. Matrices of type j 00032 * (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) = 00033 * .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used. 00034 * 00035 * NN (input) INTEGER 00036 * The number of values of N contained in the vector NVAL. 00037 * 00038 * NVAL (input) INTEGER array, dimension (NN) 00039 * The values of the matrix dimension N. 00040 * 00041 * NNS (input) INTEGER 00042 * The number of values of NRHS contained in the vector NSVAL. 00043 * 00044 * NSVAL (input) INTEGER array, dimension (NNS) 00045 * The values of the number of right hand sides NRHS. 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) COMPLEX*16 array, dimension 00060 * (NMAX*(NMAX+1)/2) 00061 * 00062 * AFAC (workspace) COMPLEX*16 array, dimension 00063 * (NMAX*(NMAX+1)/2) 00064 * 00065 * AINV (workspace) COMPLEX*16 array, dimension 00066 * (NMAX*(NMAX+1)/2) 00067 * 00068 * B (workspace) COMPLEX*16 array, dimension (NMAX*NSMAX) 00069 * where NSMAX is the largest entry in NSVAL. 00070 * 00071 * X (workspace) COMPLEX*16 array, dimension (NMAX*NSMAX) 00072 * 00073 * XACT (workspace) COMPLEX*16 array, dimension (NMAX*NSMAX) 00074 * 00075 * WORK (workspace) COMPLEX*16 array, dimension 00076 * (NMAX*max(2,NSMAX)) 00077 * 00078 * RWORK (workspace) DOUBLE PRECISION array, 00079 * dimension (NMAX+2*NSMAX) 00080 * 00081 * IWORK (workspace) INTEGER array, dimension (NMAX) 00082 * 00083 * NOUT (input) INTEGER 00084 * The unit number for output. 00085 * 00086 * ===================================================================== 00087 * 00088 * .. Parameters .. 00089 DOUBLE PRECISION ZERO 00090 PARAMETER ( ZERO = 0.0D+0 ) 00091 INTEGER NTYPES 00092 PARAMETER ( NTYPES = 11 ) 00093 INTEGER NTESTS 00094 PARAMETER ( NTESTS = 8 ) 00095 * .. 00096 * .. Local Scalars .. 00097 LOGICAL TRFCON, ZEROT 00098 CHARACTER DIST, PACKIT, TYPE, UPLO, XTYPE 00099 CHARACTER*3 PATH 00100 INTEGER I, I1, I2, IMAT, IN, INFO, IOFF, IRHS, IUPLO, 00101 $ IZERO, J, K, KL, KU, LDA, MODE, N, NERRS, 00102 $ NFAIL, NIMAT, NPP, NRHS, NRUN, NT 00103 DOUBLE PRECISION ANORM, CNDNUM, RCOND, RCONDC 00104 * .. 00105 * .. Local Arrays .. 00106 CHARACTER UPLOS( 2 ) 00107 INTEGER ISEED( 4 ), ISEEDY( 4 ) 00108 DOUBLE PRECISION RESULT( NTESTS ) 00109 * .. 00110 * .. External Functions .. 00111 LOGICAL LSAME 00112 DOUBLE PRECISION DGET06, ZLANSP 00113 EXTERNAL LSAME, DGET06, ZLANSP 00114 * .. 00115 * .. External Subroutines .. 00116 EXTERNAL ALAERH, ALAHD, ALASUM, ZCOPY, ZERRSY, ZGET04, 00117 $ ZLACPY, ZLARHS, ZLATB4, ZLATMS, ZLATSP, ZPPT05, 00118 $ ZSPCON, ZSPRFS, ZSPT01, ZSPT02, ZSPT03, ZSPTRF, 00119 $ ZSPTRI, ZSPTRS 00120 * .. 00121 * .. Intrinsic Functions .. 00122 INTRINSIC MAX, MIN 00123 * .. 00124 * .. Scalars in Common .. 00125 LOGICAL LERR, OK 00126 CHARACTER*32 SRNAMT 00127 INTEGER INFOT, NUNIT 00128 * .. 00129 * .. Common blocks .. 00130 COMMON / INFOC / INFOT, NUNIT, OK, LERR 00131 COMMON / SRNAMC / SRNAMT 00132 * .. 00133 * .. Data statements .. 00134 DATA ISEEDY / 1988, 1989, 1990, 1991 / 00135 DATA UPLOS / 'U', 'L' / 00136 * .. 00137 * .. Executable Statements .. 00138 * 00139 * Initialize constants and the random number seed. 00140 * 00141 PATH( 1: 1 ) = 'Zomplex precision' 00142 PATH( 2: 3 ) = 'SP' 00143 NRUN = 0 00144 NFAIL = 0 00145 NERRS = 0 00146 DO 10 I = 1, 4 00147 ISEED( I ) = ISEEDY( I ) 00148 10 CONTINUE 00149 * 00150 * Test the error exits 00151 * 00152 IF( TSTERR ) 00153 $ CALL ZERRSY( PATH, NOUT ) 00154 INFOT = 0 00155 * 00156 * Do for each value of N in NVAL 00157 * 00158 DO 170 IN = 1, NN 00159 N = NVAL( IN ) 00160 LDA = MAX( N, 1 ) 00161 XTYPE = 'N' 00162 NIMAT = NTYPES 00163 IF( N.LE.0 ) 00164 $ NIMAT = 1 00165 * 00166 DO 160 IMAT = 1, NIMAT 00167 * 00168 * Do the tests only if DOTYPE( IMAT ) is true. 00169 * 00170 IF( .NOT.DOTYPE( IMAT ) ) 00171 $ GO TO 160 00172 * 00173 * Skip types 3, 4, 5, or 6 if the matrix size is too small. 00174 * 00175 ZEROT = IMAT.GE.3 .AND. IMAT.LE.6 00176 IF( ZEROT .AND. N.LT.IMAT-2 ) 00177 $ GO TO 160 00178 * 00179 * Do first for UPLO = 'U', then for UPLO = 'L' 00180 * 00181 DO 150 IUPLO = 1, 2 00182 UPLO = UPLOS( IUPLO ) 00183 IF( LSAME( UPLO, 'U' ) ) THEN 00184 PACKIT = 'C' 00185 ELSE 00186 PACKIT = 'R' 00187 END IF 00188 * 00189 IF( IMAT.NE.NTYPES ) THEN 00190 * 00191 * Set up parameters with ZLATB4 and generate a test 00192 * matrix with ZLATMS. 00193 * 00194 CALL ZLATB4( PATH, IMAT, N, N, TYPE, KL, KU, ANORM, 00195 $ MODE, CNDNUM, DIST ) 00196 * 00197 SRNAMT = 'ZLATMS' 00198 CALL ZLATMS( N, N, DIST, ISEED, TYPE, RWORK, MODE, 00199 $ CNDNUM, ANORM, KL, KU, PACKIT, A, LDA, 00200 $ WORK, INFO ) 00201 * 00202 * Check error code from ZLATMS. 00203 * 00204 IF( INFO.NE.0 ) THEN 00205 CALL ALAERH( PATH, 'ZLATMS', INFO, 0, UPLO, N, N, 00206 $ -1, -1, -1, IMAT, NFAIL, NERRS, NOUT ) 00207 GO TO 150 00208 END IF 00209 * 00210 * For types 3-6, zero one or more rows and columns of 00211 * the matrix to test that INFO is returned correctly. 00212 * 00213 IF( ZEROT ) THEN 00214 IF( IMAT.EQ.3 ) THEN 00215 IZERO = 1 00216 ELSE IF( IMAT.EQ.4 ) THEN 00217 IZERO = N 00218 ELSE 00219 IZERO = N / 2 + 1 00220 END IF 00221 * 00222 IF( IMAT.LT.6 ) THEN 00223 * 00224 * Set row and column IZERO to zero. 00225 * 00226 IF( IUPLO.EQ.1 ) THEN 00227 IOFF = ( IZERO-1 )*IZERO / 2 00228 DO 20 I = 1, IZERO - 1 00229 A( IOFF+I ) = ZERO 00230 20 CONTINUE 00231 IOFF = IOFF + IZERO 00232 DO 30 I = IZERO, N 00233 A( IOFF ) = ZERO 00234 IOFF = IOFF + I 00235 30 CONTINUE 00236 ELSE 00237 IOFF = IZERO 00238 DO 40 I = 1, IZERO - 1 00239 A( IOFF ) = ZERO 00240 IOFF = IOFF + N - I 00241 40 CONTINUE 00242 IOFF = IOFF - IZERO 00243 DO 50 I = IZERO, N 00244 A( IOFF+I ) = ZERO 00245 50 CONTINUE 00246 END IF 00247 ELSE 00248 IF( IUPLO.EQ.1 ) THEN 00249 * 00250 * Set the first IZERO rows and columns to zero. 00251 * 00252 IOFF = 0 00253 DO 70 J = 1, N 00254 I2 = MIN( J, IZERO ) 00255 DO 60 I = 1, I2 00256 A( IOFF+I ) = ZERO 00257 60 CONTINUE 00258 IOFF = IOFF + J 00259 70 CONTINUE 00260 ELSE 00261 * 00262 * Set the last IZERO rows and columns to zero. 00263 * 00264 IOFF = 0 00265 DO 90 J = 1, N 00266 I1 = MAX( J, IZERO ) 00267 DO 80 I = I1, N 00268 A( IOFF+I ) = ZERO 00269 80 CONTINUE 00270 IOFF = IOFF + N - J 00271 90 CONTINUE 00272 END IF 00273 END IF 00274 ELSE 00275 IZERO = 0 00276 END IF 00277 ELSE 00278 * 00279 * Use a special block diagonal matrix to test alternate 00280 * code for the 2 x 2 blocks. 00281 * 00282 CALL ZLATSP( UPLO, N, A, ISEED ) 00283 END IF 00284 * 00285 * Compute the L*D*L' or U*D*U' factorization of the matrix. 00286 * 00287 NPP = N*( N+1 ) / 2 00288 CALL ZCOPY( NPP, A, 1, AFAC, 1 ) 00289 SRNAMT = 'ZSPTRF' 00290 CALL ZSPTRF( UPLO, N, AFAC, IWORK, INFO ) 00291 * 00292 * Adjust the expected value of INFO to account for 00293 * pivoting. 00294 * 00295 K = IZERO 00296 IF( K.GT.0 ) THEN 00297 100 CONTINUE 00298 IF( IWORK( K ).LT.0 ) THEN 00299 IF( IWORK( K ).NE.-K ) THEN 00300 K = -IWORK( K ) 00301 GO TO 100 00302 END IF 00303 ELSE IF( IWORK( K ).NE.K ) THEN 00304 K = IWORK( K ) 00305 GO TO 100 00306 END IF 00307 END IF 00308 * 00309 * Check error code from ZSPTRF. 00310 * 00311 IF( INFO.NE.K ) 00312 $ CALL ALAERH( PATH, 'ZSPTRF', INFO, K, UPLO, N, N, -1, 00313 $ -1, -1, IMAT, NFAIL, NERRS, NOUT ) 00314 IF( INFO.NE.0 ) THEN 00315 TRFCON = .TRUE. 00316 ELSE 00317 TRFCON = .FALSE. 00318 END IF 00319 * 00320 *+ TEST 1 00321 * Reconstruct matrix from factors and compute residual. 00322 * 00323 CALL ZSPT01( UPLO, N, A, AFAC, IWORK, AINV, LDA, RWORK, 00324 $ RESULT( 1 ) ) 00325 NT = 1 00326 * 00327 *+ TEST 2 00328 * Form the inverse and compute the residual. 00329 * 00330 IF( .NOT.TRFCON ) THEN 00331 CALL ZCOPY( NPP, AFAC, 1, AINV, 1 ) 00332 SRNAMT = 'ZSPTRI' 00333 CALL ZSPTRI( UPLO, N, AINV, IWORK, WORK, INFO ) 00334 * 00335 * Check error code from ZSPTRI. 00336 * 00337 IF( INFO.NE.0 ) 00338 $ CALL ALAERH( PATH, 'ZSPTRI', INFO, 0, UPLO, N, N, 00339 $ -1, -1, -1, IMAT, NFAIL, NERRS, NOUT ) 00340 * 00341 CALL ZSPT03( UPLO, N, A, AINV, WORK, LDA, RWORK, 00342 $ RCONDC, RESULT( 2 ) ) 00343 NT = 2 00344 END IF 00345 * 00346 * Print information about the tests that did not pass 00347 * the threshold. 00348 * 00349 DO 110 K = 1, NT 00350 IF( RESULT( K ).GE.THRESH ) THEN 00351 IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 ) 00352 $ CALL ALAHD( NOUT, PATH ) 00353 WRITE( NOUT, FMT = 9999 )UPLO, N, IMAT, K, 00354 $ RESULT( K ) 00355 NFAIL = NFAIL + 1 00356 END IF 00357 110 CONTINUE 00358 NRUN = NRUN + NT 00359 * 00360 * Do only the condition estimate if INFO is not 0. 00361 * 00362 IF( TRFCON ) THEN 00363 RCONDC = ZERO 00364 GO TO 140 00365 END IF 00366 * 00367 DO 130 IRHS = 1, NNS 00368 NRHS = NSVAL( IRHS ) 00369 * 00370 *+ TEST 3 00371 * Solve and compute residual for A * X = B. 00372 * 00373 SRNAMT = 'ZLARHS' 00374 CALL ZLARHS( PATH, XTYPE, UPLO, ' ', N, N, KL, KU, 00375 $ NRHS, A, LDA, XACT, LDA, B, LDA, ISEED, 00376 $ INFO ) 00377 CALL ZLACPY( 'Full', N, NRHS, B, LDA, X, LDA ) 00378 * 00379 SRNAMT = 'ZSPTRS' 00380 CALL ZSPTRS( UPLO, N, NRHS, AFAC, IWORK, X, LDA, 00381 $ INFO ) 00382 * 00383 * Check error code from ZSPTRS. 00384 * 00385 IF( INFO.NE.0 ) 00386 $ CALL ALAERH( PATH, 'ZSPTRS', INFO, 0, UPLO, N, N, 00387 $ -1, -1, NRHS, IMAT, NFAIL, NERRS, 00388 $ NOUT ) 00389 * 00390 CALL ZLACPY( 'Full', N, NRHS, B, LDA, WORK, LDA ) 00391 CALL ZSPT02( UPLO, N, NRHS, A, X, LDA, WORK, LDA, 00392 $ RWORK, RESULT( 3 ) ) 00393 * 00394 *+ TEST 4 00395 * Check solution from generated exact solution. 00396 * 00397 CALL ZGET04( N, NRHS, X, LDA, XACT, LDA, RCONDC, 00398 $ RESULT( 4 ) ) 00399 * 00400 *+ TESTS 5, 6, and 7 00401 * Use iterative refinement to improve the solution. 00402 * 00403 SRNAMT = 'ZSPRFS' 00404 CALL ZSPRFS( UPLO, N, NRHS, A, AFAC, IWORK, B, LDA, X, 00405 $ LDA, RWORK, RWORK( NRHS+1 ), WORK, 00406 $ RWORK( 2*NRHS+1 ), INFO ) 00407 * 00408 * Check error code from ZSPRFS. 00409 * 00410 IF( INFO.NE.0 ) 00411 $ CALL ALAERH( PATH, 'ZSPRFS', INFO, 0, UPLO, N, N, 00412 $ -1, -1, NRHS, IMAT, NFAIL, NERRS, 00413 $ NOUT ) 00414 * 00415 CALL ZGET04( N, NRHS, X, LDA, XACT, LDA, RCONDC, 00416 $ RESULT( 5 ) ) 00417 CALL ZPPT05( UPLO, N, NRHS, A, B, LDA, X, LDA, XACT, 00418 $ LDA, RWORK, RWORK( NRHS+1 ), 00419 $ RESULT( 6 ) ) 00420 * 00421 * Print information about the tests that did not pass 00422 * the threshold. 00423 * 00424 DO 120 K = 3, 7 00425 IF( RESULT( K ).GE.THRESH ) THEN 00426 IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 ) 00427 $ CALL ALAHD( NOUT, PATH ) 00428 WRITE( NOUT, FMT = 9998 )UPLO, N, NRHS, IMAT, 00429 $ K, RESULT( K ) 00430 NFAIL = NFAIL + 1 00431 END IF 00432 120 CONTINUE 00433 NRUN = NRUN + 5 00434 130 CONTINUE 00435 * 00436 *+ TEST 8 00437 * Get an estimate of RCOND = 1/CNDNUM. 00438 * 00439 140 CONTINUE 00440 ANORM = ZLANSP( '1', UPLO, N, A, RWORK ) 00441 SRNAMT = 'ZSPCON' 00442 CALL ZSPCON( UPLO, N, AFAC, IWORK, ANORM, RCOND, WORK, 00443 $ INFO ) 00444 * 00445 * Check error code from ZSPCON. 00446 * 00447 IF( INFO.NE.0 ) 00448 $ CALL ALAERH( PATH, 'ZSPCON', INFO, 0, UPLO, N, N, -1, 00449 $ -1, -1, IMAT, NFAIL, NERRS, NOUT ) 00450 * 00451 RESULT( 8 ) = DGET06( RCOND, RCONDC ) 00452 * 00453 * Print the test ratio if it is .GE. THRESH. 00454 * 00455 IF( RESULT( 8 ).GE.THRESH ) THEN 00456 IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 ) 00457 $ CALL ALAHD( NOUT, PATH ) 00458 WRITE( NOUT, FMT = 9999 )UPLO, N, IMAT, 8, 00459 $ RESULT( 8 ) 00460 NFAIL = NFAIL + 1 00461 END IF 00462 NRUN = NRUN + 1 00463 150 CONTINUE 00464 160 CONTINUE 00465 170 CONTINUE 00466 * 00467 * Print a summary of the results. 00468 * 00469 CALL ALASUM( PATH, NOUT, NFAIL, NRUN, NERRS ) 00470 * 00471 9999 FORMAT( ' UPLO = ''', A1, ''', N =', I5, ', type ', I2, ', test ', 00472 $ I2, ', ratio =', G12.5 ) 00473 9998 FORMAT( ' UPLO = ''', A1, ''', N =', I5, ', NRHS=', I3, ', type ', 00474 $ I2, ', test(', I2, ') =', G12.5 ) 00475 RETURN 00476 * 00477 * End of ZCHKSP 00478 * 00479 END
1.7.3 
