*DECK SCHK43 SUBROUTINE SCHK43 (SNAME, EPS, THRESH, NOUT, KPRINT, FATAL, NIDIM, $ IDIM, NALF, ALF, NBET, BET, NMAX, A, AA, AS, B, BB, BS, C, CC, $ CS, CT, G) C***BEGIN PROLOGUE SCHK43 C***SUBSIDIARY C***PURPOSE Quick check for SSYRK. 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 SSYRK. C C Auxiliary routine for test program for Level 3 Blas. C***REFERENCES (NONE) C***ROUTINES CALLED LSE, LSERES, NUMXER, SMAKE3, SMMCH, SSYRK C***REVISION HISTORY (YYMMDD) C 890208 DATE WRITTEN C 910619 Modified to meet SLATEC code and prologue standards. (BKS) C***END PROLOGUE SCHK43 C .. Parameters .. REAL ZERO, ONE PARAMETER ( ZERO = 0.0, ONE = 1.0) C .. Scalar Arguments .. LOGICAL FATAL REAL EPS, THRESH INTEGER KPRINT, NALF, NBET, NIDIM, NMAX, NOUT CHARACTER*6 SNAME C .. Array Arguments .. REAL A( NMAX, NMAX), AA( NMAX*NMAX), ALF( NALF), $ AS( NMAX*NMAX ), BET( NBET ), G( NMAX ), $ B( NMAX, NMAX ), BB( NMAX*NMAX ), $ BS( NMAX*NMAX ), C( NMAX, NMAX ), $ CC( NMAX*NMAX ), CS( NMAX*NMAX ), $ CT( NMAX ) INTEGER IDIM( NIDIM ) C .. Local Scalars .. REAL ALPHA, ALS, BETA, BETS, ERR, ERRMAX INTEGER I, IA, IB, ICT, ICU, IK, IN, J, JC, JJ, K, LAA, $ LCC, LDA, LDAS, LDC, LDCS, $ N, NA, NARGS, NC, NERR, NS, KS, LJ, MA LOGICAL FTL, NULL, RESET, TRAN, UPPER CHARACTER*1 UPLO, UPLOS, TRANS, TRANSS CHARACTER*2 ICHU CHARACTER*3 ICHT C .. Local Arrays .. LOGICAL ISAME( 13 ) C .. External Functions .. INTEGER NUMXER LOGICAL LSE, LSERES EXTERNAL LSE, LSERES, NUMXER C .. External Subroutines .. EXTERNAL SSYRK, SMAKE3, SMMCH C .. Intrinsic Functions .. INTRINSIC MAX C .. Data statements .. DATA ICHT/'NTC'/, ICHU/'UL'/ C***FIRST EXECUTABLE STATEMENT SCHK43 NARGS = 10 C NC = 0 RESET = .TRUE. ERRMAX = ZERO C C DO 100 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 100 LCC = LDC*N NULL = N.LE.0 C DO 90 IK = 1, NIDIM K = IDIM( IK ) C DO 80 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 80 LAA = LDA*NA C C Generate the matrix A. C CALL SMAKE3( 'GE', ' ', ' ', MA, NA, A, NMAX, AA, LDA, $ RESET, ZERO ) C DO 70 ICU = 1, 2 UPLO = ICHU( ICU: ICU ) UPPER = UPLO.EQ.'U' C DO 60 IA = 1, NALF ALPHA = ALF( IA ) C DO 50 IB = 1, NBET BETA = BET( IB ) C C Generate the matrix C. C CALL SMAKE3( '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 BETS = BETA DO 20 I = 1, LCC CS( I ) = CC( I ) 20 CONTINUE LDCS = LDC C C Call the subroutine. C CALL SSYRK( UPLO, TRANS, N, K, ALPHA, AA, LDA, $ 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 ) ENDIF 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 ) = LSE( AS, AA, LAA ) ISAME( 7 ) = LDAS.EQ.LDA ISAME( 8 ) = BETS.EQ.BETA IF( NULL )THEN ISAME( 9 ) = LSE( CS, CC, LCC ) ELSE ISAME( 9 ) = LSERES( 'SY', UPLO, N, N, CS, $ CC, LDC ) END IF ISAME( 10 ) = LDCS.EQ.LDC C C If data was incorrectly changed, report and C return. C DO 30 I = 1, NARGS IF (.NOT. ISAME( I )) THEN FATAL = .TRUE. IF (KPRINT .GE. 2) THEN WRITE( NOUT, FMT = 9998 )I ENDIF ENDIF 30 CONTINUE C FTL = .FALSE. IF( .NOT.NULL )THEN C C Check the result column by column. C JC = 1 DO 40 J = 1, N IF( UPPER )THEN JJ = 1 LJ = J ELSE JJ = J LJ = N - J + 1 END IF IF( TRAN )THEN CALL SMMCH( 'T', 'N', LJ, 1, K, ALPHA, $ A( 1, JJ ), NMAX, $ A( 1, J ), NMAX, BETA, $ C( JJ, J ), NMAX, CT, G, $ CC( JC ), LDC, EPS, ERR, $ FTL, NOUT, .TRUE.,KPRINT) ELSE CALL SMMCH( 'N', 'T', LJ, 1, K, ALPHA, $ A( JJ, 1 ), NMAX, $ A( J, 1 ), 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 END IF ERRMAX = MAX( ERRMAX, ERR ) 40 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, BETA, LDC ENDIF ENDIF C 50 CONTINUE C 60 CONTINUE C 70 CONTINUE C 80 CONTINUE C 90 CONTINUE C 100 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, ',', F4.1, ', C,', I3, ') .' ) 9993 FORMAT( ' ******* FATAL ERROR - ERROR-EXIT TAKEN ON VALID CALL *', $ '******' ) C C End of SCHK43. C END