*DECK DCHK53 SUBROUTINE DCHK53 (SNAME, EPS, THRESH, NOUT, KPRINT, FATAL, NIDIM, $ IDIM, NALF, ALF, NBET, BET, NMAX, AB, AA, AS, BB, BS, C, CC, $ CS, CT, G, W) C***BEGIN PROLOGUE DCHK53 C***SUBSIDIARY C***PURPOSE Test DSYR2K. C***LIBRARY SLATEC (BLAS) C***KEYWORDS BLAS, QUICK CHECK SERVICE ROUTINE C***AUTHOR Dongarra, J. J., (ANL) C Duff, I., (AERE) C Du Croz, J., (NAG) C Hammarling, S., (NAG) C***DESCRIPTION C C Quick check for DSYR2K. C C Auxiliary routine for test program for Level 3 Blas. C***REFERENCES (NONE) C***ROUTINES CALLED DMAKE3, DMMCH, DSYR2K, LDE, LDERES, NUMXER C***REVISION HISTORY (YYMMDD) C 890208 DATE WRITTEN C 910619 Modified to meet SLATEC code and prologue standards. (BKS) C***END PROLOGUE DCHK53 C .. Parameters .. DOUBLE PRECISION ZERO PARAMETER ( ZERO = 0.0D0 ) C .. Scalar Arguments .. LOGICAL FATAL DOUBLE PRECISION EPS, THRESH INTEGER KPRINT, NALF, NBET, NIDIM, NMAX, NOUT CHARACTER*6 SNAME C .. Array Arguments .. DOUBLE PRECISION AA( NMAX*NMAX ), AB( 2*NMAX*NMAX ), $ ALF( NALF ), AS( NMAX*NMAX ), BB( NMAX*NMAX ), $ BET( NBET ), BS( NMAX*NMAX ), C( NMAX, NMAX ), $ CC( NMAX*NMAX ), CS( NMAX*NMAX ), CT( NMAX ), $ G( NMAX ), W( 2*NMAX ) INTEGER IDIM( NIDIM ) C .. Local Scalars .. DOUBLE PRECISION ALPHA, ALS, BETA, BETS, ERR, ERRMAX INTEGER I, IA, IB, ICT, ICU, IK, IN, J, JC, JJ, JJAB, $ K, KS, LAA, LBB, LCC, LDA, LDAS, LDB, LDBS, $ LDC, LDCS, LJ, MA, N, NA, NARGS, NC, NERR, NS LOGICAL FTL, NULL, RESET, TRAN, UPPER CHARACTER*1 TRANS, TRANSS, UPLO, UPLOS CHARACTER*2 ICHU CHARACTER*3 ICHT C .. Local Arrays .. LOGICAL ISAME( 13 ) C .. External Functions .. INTEGER NUMXER LOGICAL LDE, LDERES EXTERNAL LDE, LDERES, NUMXER C .. External Subroutines .. EXTERNAL DSYR2K, DMAKE3, DMMCH C .. Intrinsic Functions .. INTRINSIC ABS, MAX, MIN C .. Data statements .. DATA ICHU/'UL'/, ICHT/'NTC'/ C***FIRST EXECUTABLE STATEMENT DCHK53 NARGS = 12 NC = 0 RESET = .TRUE. ERRMAX = ZERO C DO 130 IN = 1, NIDIM N = IDIM( IN ) C Set LDC to 1 more than minimum value if room. LDC = N IF( LDC.LT.NMAX ) $ LDC = LDC + 1 C Skip tests if not enough room. IF( LDC.GT.NMAX ) $ GO TO 130 LCC = LDC*N NULL = N.LE.0 C DO 120 IK = 1, NIDIM K = IDIM( IK ) C DO 110 ICT = 1, 3 TRANS = ICHT( ICT: ICT ) TRAN = TRANS.EQ.'T'.OR.TRANS.EQ.'C' IF( TRAN )THEN MA = K NA = N ELSE MA = N NA = K END IF C Set LDA to 1 more than minimum value if room. LDA = MA IF( LDA.LT.NMAX ) $ LDA = LDA + 1 C Skip tests if not enough room. IF( LDA.GT.NMAX ) $ GO TO 110 LAA = LDA*NA C C Generate the matrix A. C IF( TRAN )THEN CALL DMAKE3( 'GE', ' ', ' ', MA, NA, AB, 2*NMAX, AA, $ LDA, RESET, ZERO ) ELSE CALL DMAKE3('GE', ' ', ' ', MA, NA, AB, NMAX, AA, LDA, $ RESET, ZERO ) END IF C C Generate the matrix B. C LDB = LDA LBB = LAA IF( TRAN )THEN CALL DMAKE3( 'GE', ' ', ' ', MA, NA, AB( K + 1 ), $ 2*NMAX, BB, LDB, RESET, ZERO ) ELSE CALL DMAKE3( 'GE', ' ', ' ', MA, NA, AB( K*NMAX + 1 ), $ NMAX, BB, LDB, RESET, ZERO ) END IF C DO 100 ICU = 1, 2 UPLO = ICHU( ICU: ICU ) UPPER = UPLO.EQ.'U' C DO 90 IA = 1, NALF ALPHA = ALF( IA ) C DO 80 IB = 1, NBET BETA = BET( IB ) C C Generate the matrix C. C CALL DMAKE3( 'SY', UPLO, ' ', N, N, C, NMAX, CC, $ LDC, RESET, ZERO ) C NC = NC + 1 C C Save every datum before calling the subroutine. C UPLOS = UPLO TRANSS = TRANS NS = N KS = K ALS = ALPHA DO 10 I = 1, LAA AS( I ) = AA( I ) 10 CONTINUE LDAS = LDA DO 20 I = 1, LBB BS( I ) = BB( I ) 20 CONTINUE LDBS = LDB BETS = BETA DO 30 I = 1, LCC CS( I ) = CC( I ) 30 CONTINUE LDCS = LDC C C Call the subroutine. C CALL DSYR2K( UPLO, TRANS, N, K, ALPHA, AA, LDA, $ BB, LDB, BETA, CC, LDC ) C C Check if error-exit was taken incorrectly. C IF( NUMXER(NERR) .NE. 0 )THEN IF (KPRINT .GE. 2) THEN WRITE( NOUT, FMT = 9993 ) END IF FATAL = .TRUE. END IF C C See what data changed inside subroutines. C ISAME( 1 ) = UPLOS.EQ.UPLO ISAME( 2 ) = TRANSS.EQ.TRANS ISAME( 3 ) = NS.EQ.N ISAME( 4 ) = KS.EQ.K ISAME( 5 ) = ALS.EQ.ALPHA ISAME( 6 ) = LDE( AS, AA, LAA ) ISAME( 7 ) = LDAS.EQ.LDA ISAME( 8 ) = LDE( BS, BB, LBB ) ISAME( 9 ) = LDBS.EQ.LDB ISAME( 10 ) = BETS.EQ.BETA IF( NULL )THEN ISAME( 11 ) = LDE( CS, CC, LCC ) ELSE ISAME( 11 ) = LDERES( 'SY', UPLO, N, N, CS, $ CC, LDC ) END IF ISAME( 12 ) = LDCS.EQ.LDC C C If data was incorrectly changed, report and C return. C DO 40 I = 1, NARGS IF (.NOT. ISAME( I )) THEN FATAL = .TRUE. IF (KPRINT .GE. 2) THEN WRITE( NOUT, FMT = 9998 )I ENDIF ENDIF 40 CONTINUE C FTL = .FALSE. IF( .NOT.NULL )THEN C C Check the result column by column. C JJAB = 1 JC = 1 DO 70 J = 1, N IF( UPPER )THEN JJ = 1 LJ = J ELSE JJ = J LJ = N - J + 1 END IF IF( TRAN )THEN DO 50 I = 1, K W( I ) = AB( ( J - 1 )*2*NMAX + K + $ I ) W( K + I ) = AB( ( J - 1 )*2*NMAX + $ I ) 50 CONTINUE CALL DMMCH( 'T', 'N', LJ, 1, 2*K, $ ALPHA, AB( JJAB ), 2*NMAX, $ W, 2*NMAX, BETA, $ C( JJ, J ), NMAX, CT, G, $ CC( JC ), LDC, EPS, ERR, $ FTL, NOUT, .TRUE., $ KPRINT ) ELSE DO 60 I = 1, K W( I ) = AB( ( K + I - 1 )*NMAX + $ J ) W( K + I ) = AB( ( I - 1 )*NMAX + $ J ) 60 CONTINUE CALL DMMCH( 'N', 'N', LJ, 1, 2*K, $ ALPHA, AB( JJ ), NMAX, W, $ 2*NMAX, BETA, C( JJ, J ), $ NMAX, CT, G, CC( JC ), LDC, $ EPS, ERR, FTL, NOUT, $ .TRUE., KPRINT ) END IF IF( UPPER )THEN JC = JC + LDC ELSE JC = JC + LDC + 1 IF( TRAN ) $ JJAB = JJAB + 2*NMAX END IF ERRMAX = MAX( ERRMAX, ERR ) 70 CONTINUE END IF IF (FTL) THEN FATAL = .TRUE. IF (KPRINT .GE. 3) THEN WRITE( NOUT, FMT = 9996 )SNAME WRITE( NOUT, FMT = 9994 )NC, $ SNAME, UPLO, TRANS, $ N, K, ALPHA, LDA, LDB, $ BETA, LDC ENDIF ENDIF C 80 CONTINUE C 90 CONTINUE C 100 CONTINUE C 110 CONTINUE C 120 CONTINUE C 130 CONTINUE C C Report result. C IF (.NOT. FATAL) THEN IF (KPRINT .GE. 3) THEN IF( ERRMAX.LT.THRESH )THEN WRITE( NOUT, FMT = 9999 )SNAME, NC ELSE WRITE( NOUT, FMT = 9997 )SNAME, NC, ERRMAX END IF ENDIF ENDIF RETURN C 9999 FORMAT( ' ', A6, ' PASSED THE COMPUTATIONAL TESTS (', I6, ' CALL', $ 'S)' ) 9998 FORMAT( ' ******* FATAL ERROR - PARAMETER NUMBER ', I2, ' WAS CH', $ 'ANGED INCORRECTLY *******' ) 9997 FORMAT( ' ', A6, ' COMPLETED THE COMPUTATIONAL TESTS (', I6, ' C', $ 'ALLS)', /' ******* BUT WITH MAXIMUM TEST RATIO', F8.2, $ ' - SUSPECT *******' ) 9996 FORMAT( ' ******* ', A6, ' FAILED ON CALL NUMBER:' ) 9994 FORMAT( 1X, I6, ': ', A6, '(', 2( '''', A1, ''',' ), 2( I3, ',' ), $ F4.1, ', A,', I3, ', B,', I3, ',', F4.1, ', C,', I3, ') ', $ ' .' ) 9993 FORMAT( ' ******* FATAL ERROR - ERROR-EXIT TAKEN ON VALID CALL *', $ '******' ) C C End of DCHK53. C END