*DECK SCHK23 SUBROUTINE SCHK23 (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 SCHK23 C***SUBSIDIARY C***PURPOSE Quick check for SSYMM. 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 SSYMM. C C Auxiliary routine for test program for Level 3 Blas. C***REFERENCES (NONE) C***ROUTINES CALLED LSE, LSERES, NUMXER, SMAKE3, SMMCH, SSYMM C***REVISION HISTORY (YYMMDD) C 890208 DATE WRITTEN C 910619 Modified to meet SLATEC code and prologue standards. (BKS) C***END PROLOGUE SCHK23 C .. Parameters .. REAL ZERO PARAMETER ( ZERO = 0.0 ) 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, BLS, ERR, ERRMAX INTEGER I, IA, IB, ICS, ICU, IM, IN, LAA, $ LBB, LCC, LDA, LDAS, LDB, LDBS, LDC, LDCS, M, $ MS, N, NA, NARGS, NC, NERR, NS LOGICAL FTL, NULL, RESET, LEFT CHARACTER*1 SIDE, SIDES, UPLO, UPLOS CHARACTER*2 ICHS, ICHU C .. Local Arrays .. LOGICAL ISAME( 13 ) C .. External Functions .. INTEGER NUMXER LOGICAL LSE, LSERES EXTERNAL LSE, LSERES, NUMXER C .. External Subroutines .. EXTERNAL SSYMM, SMAKE3, SMMCH C .. Intrinsic Functions .. INTRINSIC MAX C .. Data statements .. DATA ICHS/'LR'/, ICHU/'UL'/ C***FIRST EXECUTABLE STATEMENT SCHK23 NARGS = 12 C NC = 0 RESET = .TRUE. ERRMAX = ZERO C DO 100 IM = 1, NIDIM M = IDIM( IM ) C DO 90 IN = 1, NIDIM N = IDIM( IN ) C Set LDC to 1 more than minimum value if room. LDC = M IF( LDC.LT.NMAX ) $ LDC = LDC + 1 C Skip tests if not enough room. IF( LDC.GT.NMAX ) $ GO TO 90 LCC = LDC*N NULL = N.LE.0.OR.M.LE.0 C C Set LDB to 1 more than minimum value if room. LDB = M IF( LDB.LT.NMAX ) $ LDB = LDB + 1 C Skip tests if not enough room. IF( LDB.GT.NMAX ) $ GO TO 90 LBB = LDB*N C C Generate the matrix B. C CALL SMAKE3( 'GE', ' ', ' ', M, N, B, NMAX, BB, LDB, RESET, $ ZERO ) C DO 80 ICS = 1, 2 SIDE = ICHS( ICS: ICS ) LEFT = SIDE.EQ.'L' C IF( LEFT )THEN NA = M ELSE NA = N END IF C Set LDA to 1 more than minimum value if room. LDA = NA 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 DO 70 ICU = 1, 2 UPLO = ICHU( ICU: ICU ) C C Generate the symmetric matrix A. C CALL SMAKE3('SY', UPLO, ' ', NA, NA, A, NMAX, AA, LDA, $ RESET, ZERO ) 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( 'GE', ' ', ' ', M, N, C, NMAX, CC, $ LDC, RESET, ZERO ) C NC = NC + 1 C C Save every datum before calling the C subroutine. C SIDES = SIDE UPLOS = UPLO MS = M NS = N 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 BLS = BETA DO 30 I = 1, LCC CS( I ) = CC( I ) 30 CONTINUE LDCS = LDC C C Call the subroutine. C CALL SSYMM( SIDE, UPLO, M, N, 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 = 9994 ) ENDIF FATAL = .TRUE. END IF C C See what data changed inside subroutines. C ISAME( 1 ) = SIDES.EQ.SIDE ISAME( 2 ) = UPLOS.EQ.UPLO ISAME( 3 ) = MS.EQ.M ISAME( 4 ) = NS.EQ.N ISAME( 5 ) = ALS.EQ.ALPHA ISAME( 6 ) = LSE( AS, AA, LAA ) ISAME( 7 ) = LDAS.EQ.LDA ISAME( 8 ) = LSE( BS, BB, LBB ) ISAME( 9 ) = LDBS.EQ.LDB ISAME( 10 ) = BLS.EQ.BETA IF( NULL )THEN ISAME( 11 ) = LSE( CS, CC, LCC ) ELSE ISAME( 11 ) = LSERES( 'GE', ' ', M, 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. C IF( LEFT )THEN CALL SMMCH( 'N', 'N', M, N, M, ALPHA, A, $ NMAX, B, NMAX, BETA, C, NMAX, $ CT, G, CC, LDC, EPS, ERR, $ FTL, NOUT, .TRUE., KPRINT ) ELSE CALL SMMCH( 'N', 'N', M, N, N, ALPHA, B, $ NMAX, A, NMAX, BETA, C, NMAX, $ CT, G, CC, LDC, EPS, ERR, $ FTL, NOUT, .TRUE., KPRINT ) END IF ERRMAX = MAX( ERRMAX, ERR ) END IF IF (FTL) THEN FATAL = .TRUE. IF (KPRINT .GE. 3) THEN WRITE (NOUT, FMT = 9996) SNAME WRITE( NOUT, FMT = 9995 )NC, SNAME, $ SIDE, UPLO, M, N, $ ALPHA, LDA, LDB, 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:' ) 9995 FORMAT( 1X, I6, ': ', A6, '(', 2( '''', A1, ''',' ), 2( I3, ',' ), $ F4.1, ', A,', I3, ', B,', I3, ',', F4.1, ', C,', I3, ') ', $ ' .' ) 9994 FORMAT( ' ******* FATAL ERROR - ERROR-EXIT TAKEN ON VALID CALL *', $ '******' ) C C End of SCHK23. C END