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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 SDRVRF3( NOUT, NN, NVAL, THRESH, A, LDA, ARF, B1, B2, 00002 + S_WORK_SLANGE, S_WORK_SGEQRF, TAU ) 00003 * 00004 * -- LAPACK test routine (version 3.2.0) -- 00005 * Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. 00006 * November 2008 00007 * 00008 * .. Scalar Arguments .. 00009 INTEGER LDA, NN, NOUT 00010 REAL THRESH 00011 * .. 00012 * .. Array Arguments .. 00013 INTEGER NVAL( NN ) 00014 REAL A( LDA, * ), ARF( * ), B1( LDA, * ), 00015 + B2( LDA, * ), S_WORK_SGEQRF( * ), 00016 + S_WORK_SLANGE( * ), TAU( * ) 00017 * .. 00018 * 00019 * Purpose 00020 * ======= 00021 * 00022 * SDRVRF3 tests the LAPACK RFP routines: 00023 * STFSM 00024 * 00025 * Arguments 00026 * ========= 00027 * 00028 * NOUT (input) INTEGER 00029 * The unit number for output. 00030 * 00031 * NN (input) INTEGER 00032 * The number of values of N contained in the vector NVAL. 00033 * 00034 * NVAL (input) INTEGER array, dimension (NN) 00035 * The values of the matrix dimension N. 00036 * 00037 * THRESH (input) REAL 00038 * The threshold value for the test ratios. A result is 00039 * included in the output file if RESULT >= THRESH. To have 00040 * every test ratio printed, use THRESH = 0. 00041 * 00042 * A (workspace) REAL array, dimension (LDA,NMAX) 00043 * 00044 * LDA (input) INTEGER 00045 * The leading dimension of the array A. LDA >= max(1,NMAX). 00046 * 00047 * ARF (workspace) REAL array, dimension ((NMAX*(NMAX+1))/2). 00048 * 00049 * B1 (workspace) REAL array, dimension (LDA,NMAX) 00050 * 00051 * B2 (workspace) REAL array, dimension (LDA,NMAX) 00052 * 00053 * S_WORK_SLANGE (workspace) REAL array, dimension (NMAX) 00054 * 00055 * S_WORK_SGEQRF (workspace) REAL array, dimension (NMAX) 00056 * 00057 * TAU (workspace) REAL array, dimension (NMAX) 00058 * 00059 * ===================================================================== 00060 * .. 00061 * .. Parameters .. 00062 REAL ZERO, ONE 00063 PARAMETER ( ZERO = ( 0.0E+0, 0.0E+0 ) , 00064 + ONE = ( 1.0E+0, 0.0E+0 ) ) 00065 INTEGER NTESTS 00066 PARAMETER ( NTESTS = 1 ) 00067 * .. 00068 * .. Local Scalars .. 00069 CHARACTER UPLO, CFORM, DIAG, TRANS, SIDE 00070 INTEGER I, IFORM, IIM, IIN, INFO, IUPLO, J, M, N, NA, 00071 + NFAIL, NRUN, ISIDE, IDIAG, IALPHA, ITRANS 00072 REAL EPS, ALPHA 00073 * .. 00074 * .. Local Arrays .. 00075 CHARACTER UPLOS( 2 ), FORMS( 2 ), TRANSS( 2 ), 00076 + DIAGS( 2 ), SIDES( 2 ) 00077 INTEGER ISEED( 4 ), ISEEDY( 4 ) 00078 REAL RESULT( NTESTS ) 00079 * .. 00080 * .. External Functions .. 00081 REAL SLAMCH, SLANGE, SLARND 00082 EXTERNAL SLAMCH, SLANGE, SLARND 00083 * .. 00084 * .. External Subroutines .. 00085 EXTERNAL STRTTF, SGEQRF, SGEQLF, STFSM, STRSM 00086 * .. 00087 * .. Intrinsic Functions .. 00088 INTRINSIC MAX, SQRT 00089 * .. 00090 * .. Scalars in Common .. 00091 CHARACTER*32 SRNAMT 00092 * .. 00093 * .. Common blocks .. 00094 COMMON / SRNAMC / SRNAMT 00095 * .. 00096 * .. Data statements .. 00097 DATA ISEEDY / 1988, 1989, 1990, 1991 / 00098 DATA UPLOS / 'U', 'L' / 00099 DATA FORMS / 'N', 'T' / 00100 DATA SIDES / 'L', 'R' / 00101 DATA TRANSS / 'N', 'T' / 00102 DATA DIAGS / 'N', 'U' / 00103 * .. 00104 * .. Executable Statements .. 00105 * 00106 * Initialize constants and the random number seed. 00107 * 00108 NRUN = 0 00109 NFAIL = 0 00110 INFO = 0 00111 DO 10 I = 1, 4 00112 ISEED( I ) = ISEEDY( I ) 00113 10 CONTINUE 00114 EPS = SLAMCH( 'Precision' ) 00115 * 00116 DO 170 IIM = 1, NN 00117 * 00118 M = NVAL( IIM ) 00119 * 00120 DO 160 IIN = 1, NN 00121 * 00122 N = NVAL( IIN ) 00123 * 00124 DO 150 IFORM = 1, 2 00125 * 00126 CFORM = FORMS( IFORM ) 00127 * 00128 DO 140 IUPLO = 1, 2 00129 * 00130 UPLO = UPLOS( IUPLO ) 00131 * 00132 DO 130 ISIDE = 1, 2 00133 * 00134 SIDE = SIDES( ISIDE ) 00135 * 00136 DO 120 ITRANS = 1, 2 00137 * 00138 TRANS = TRANSS( ITRANS ) 00139 * 00140 DO 110 IDIAG = 1, 2 00141 * 00142 DIAG = DIAGS( IDIAG ) 00143 * 00144 DO 100 IALPHA = 1, 3 00145 * 00146 IF ( IALPHA.EQ. 1) THEN 00147 ALPHA = ZERO 00148 ELSE IF ( IALPHA.EQ. 1) THEN 00149 ALPHA = ONE 00150 ELSE 00151 ALPHA = SLARND( 2, ISEED ) 00152 END IF 00153 * 00154 * All the parameters are set: 00155 * CFORM, SIDE, UPLO, TRANS, DIAG, M, N, 00156 * and ALPHA 00157 * READY TO TEST! 00158 * 00159 NRUN = NRUN + 1 00160 * 00161 IF ( ISIDE.EQ.1 ) THEN 00162 * 00163 * The case ISIDE.EQ.1 is when SIDE.EQ.'L' 00164 * -> A is M-by-M ( B is M-by-N ) 00165 * 00166 NA = M 00167 * 00168 ELSE 00169 * 00170 * The case ISIDE.EQ.2 is when SIDE.EQ.'R' 00171 * -> A is N-by-N ( B is M-by-N ) 00172 * 00173 NA = N 00174 * 00175 END IF 00176 * 00177 * Generate A our NA--by--NA triangular 00178 * matrix. 00179 * Our test is based on forward error so we 00180 * do want A to be well conditionned! To get 00181 * a well-conditionned triangular matrix, we 00182 * take the R factor of the QR/LQ factorization 00183 * of a random matrix. 00184 * 00185 DO J = 1, NA 00186 DO I = 1, NA 00187 A( I, J) = SLARND( 2, ISEED ) 00188 END DO 00189 END DO 00190 * 00191 IF ( IUPLO.EQ.1 ) THEN 00192 * 00193 * The case IUPLO.EQ.1 is when SIDE.EQ.'U' 00194 * -> QR factorization. 00195 * 00196 SRNAMT = 'SGEQRF' 00197 CALL SGEQRF( NA, NA, A, LDA, TAU, 00198 + S_WORK_SGEQRF, LDA, 00199 + INFO ) 00200 ELSE 00201 * 00202 * The case IUPLO.EQ.2 is when SIDE.EQ.'L' 00203 * -> QL factorization. 00204 * 00205 SRNAMT = 'SGELQF' 00206 CALL SGELQF( NA, NA, A, LDA, TAU, 00207 + S_WORK_SGEQRF, LDA, 00208 + INFO ) 00209 END IF 00210 * 00211 * Store a copy of A in RFP format (in ARF). 00212 * 00213 SRNAMT = 'STRTTF' 00214 CALL STRTTF( CFORM, UPLO, NA, A, LDA, ARF, 00215 + INFO ) 00216 * 00217 * Generate B1 our M--by--N right-hand side 00218 * and store a copy in B2. 00219 * 00220 DO J = 1, N 00221 DO I = 1, M 00222 B1( I, J) = SLARND( 2, ISEED ) 00223 B2( I, J) = B1( I, J) 00224 END DO 00225 END DO 00226 * 00227 * Solve op( A ) X = B or X op( A ) = B 00228 * with STRSM 00229 * 00230 SRNAMT = 'STRSM' 00231 CALL STRSM( SIDE, UPLO, TRANS, DIAG, M, N, 00232 + ALPHA, A, LDA, B1, LDA ) 00233 * 00234 * Solve op( A ) X = B or X op( A ) = B 00235 * with STFSM 00236 * 00237 SRNAMT = 'STFSM' 00238 CALL STFSM( CFORM, SIDE, UPLO, TRANS, 00239 + DIAG, M, N, ALPHA, ARF, B2, 00240 + LDA ) 00241 * 00242 * Check that the result agrees. 00243 * 00244 DO J = 1, N 00245 DO I = 1, M 00246 B1( I, J) = B2( I, J ) - B1( I, J ) 00247 END DO 00248 END DO 00249 * 00250 RESULT(1) = SLANGE( 'I', M, N, B1, LDA, 00251 + S_WORK_SLANGE ) 00252 * 00253 RESULT(1) = RESULT(1) / SQRT( EPS ) 00254 + / MAX ( MAX( M, N), 1 ) 00255 * 00256 IF( RESULT(1).GE.THRESH ) THEN 00257 IF( NFAIL.EQ.0 ) THEN 00258 WRITE( NOUT, * ) 00259 WRITE( NOUT, FMT = 9999 ) 00260 END IF 00261 WRITE( NOUT, FMT = 9997 ) 'STFSM', 00262 + CFORM, SIDE, UPLO, TRANS, DIAG, M, 00263 + N, RESULT(1) 00264 NFAIL = NFAIL + 1 00265 END IF 00266 * 00267 100 CONTINUE 00268 110 CONTINUE 00269 120 CONTINUE 00270 130 CONTINUE 00271 140 CONTINUE 00272 150 CONTINUE 00273 160 CONTINUE 00274 170 CONTINUE 00275 * 00276 * Print a summary of the results. 00277 * 00278 IF ( NFAIL.EQ.0 ) THEN 00279 WRITE( NOUT, FMT = 9996 ) 'STFSM', NRUN 00280 ELSE 00281 WRITE( NOUT, FMT = 9995 ) 'STFSM', NFAIL, NRUN 00282 END IF 00283 * 00284 9999 FORMAT( 1X, 00285 ' *** Error(s) or Failure(s) while testing STFSM + ***') 00286 9997 FORMAT( 1X, ' Failure in ',A5,', CFORM=''',A1,''',', 00287 + ' SIDE=''',A1,''',',' UPLO=''',A1,''',',' TRANS=''',A1,''',', 00288 + ' DIAG=''',A1,''',',' M=',I3,', N =', I3,', test=',G12.5) 00289 9996 FORMAT( 1X, 'All tests for ',A5,' auxiliary routine passed the ', 00290 + 'threshold (',I5,' tests run)') 00291 9995 FORMAT( 1X, A6, ' auxiliary routine:',I5,' out of ',I5, 00292 + ' tests failed to pass the threshold') 00293 * 00294 RETURN 00295 * 00296 * End of SDRVRF3 00297 * 00298 END
1.7.3 
