*DECK SCHK52 SUBROUTINE SCHK52 (SNAME, EPS, THRESH, NOUT, KPRINT, FATAL, NIDIM, $ IDIM, NALF, ALF, NINC, INC, NMAX, INCMAX, A, AA, AS, X, XX, XS, $ Y, YY, YS, YT, G, Z) C***BEGIN PROLOGUE SCHK52 C***SUBSIDIARY C***PURPOSE Quick check for SSYR and SSPR. C***LIBRARY SLATEC (BLAS) C***KEYWORDS BLAS, QUICK CHECK SERVICE ROUTINE C***AUTHOR Du Croz, J. (NAG) C Hanson, R. J. (SNLA) C***DESCRIPTION C C Quick check for SSYR and SSPR. C C Auxiliary routine for test program for Level 2 Blas. C***REFERENCES (NONE) C***ROUTINES CALLED LSE, LSERES, NUMXER, SMAKE2, SMVCH, SSPR, SSYR C***REVISION HISTORY (YYMMDD) C 870810 DATE WRITTEN C 910619 Modified to meet SLATEC code and prologue standards. (BKS) C***END PROLOGUE SCHK52 C .. Parameters .. REAL ZERO, HALF, ONE PARAMETER ( ZERO = 0.0, HALF = 0.5, ONE = 1.0 ) C .. Scalar Arguments .. LOGICAL FATAL REAL EPS, THRESH INTEGER INCMAX, KPRINT, NALF, NIDIM, NINC, NMAX, NOUT CHARACTER*6 SNAME C .. Array Arguments .. REAL A( NMAX, NMAX ), AA( NMAX*NMAX ), ALF( NALF ), $ AS( NMAX*NMAX ), G( NMAX ), X( NMAX ), $ XS( NMAX*INCMAX ), XX( NMAX*INCMAX ), $ Y( NMAX ), YS( NMAX*INCMAX ), YT( NMAX ), $ YY( NMAX*INCMAX ), Z( NMAX ) INTEGER IDIM( NIDIM ), INC( NINC ) C .. Local Scalars .. REAL ALPHA, ALS, ERR, ERRMAX, TRANSL INTEGER I, IA, IC, IN, INCX, INCXS, IX, J, JA, JJ, LAA, $ LDA, LDAS, LJ, LX, N, NARGS, NC, NS, NERR LOGICAL FTL, FULL, NULL, PACKED, RESET, UPPER CHARACTER*1 UPLO, UPLOS CHARACTER*2 ICH C .. Local Arrays .. REAL W( 1 ) LOGICAL ISAME( 13 ) C .. External Functions .. INTEGER NUMXER LOGICAL LSE, LSERES EXTERNAL LSE, LSERES, NUMXER C .. External Subroutines .. EXTERNAL SMAKE2, SMVCH, SSPR, SSYR C .. Intrinsic Functions .. INTRINSIC ABS, MAX C .. Data statements .. DATA ICH/'UL'/ C***FIRST EXECUTABLE STATEMENT SCHK52 FULL = SNAME( 3: 3 ).EQ.'Y' PACKED = SNAME( 3: 3 ).EQ.'P' C Define the number of arguments. IF( FULL )THEN NARGS = 7 ELSE IF( PACKED )THEN NARGS = 6 END IF C NC = 0 RESET = .TRUE. ERRMAX = ZERO C DO 100 IN = 1, NIDIM N = IDIM( IN ) C Set LDA to 1 more than minimum value if room. LDA = N IF( LDA.LT.NMAX ) $ LDA = LDA + 1 C Skip tests if not enough room. IF( LDA.GT.NMAX ) $ GO TO 100 IF( PACKED )THEN LAA = ( N*( N + 1 ) )/2 ELSE LAA = LDA*N END IF C DO 90 IC = 1, 2 UPLO = ICH( IC: IC ) UPPER = UPLO.EQ.'U' C DO 80 IX = 1, NINC INCX = INC( IX ) LX = ABS( INCX )*N C C Generate the vector X. C TRANSL = HALF CALL SMAKE2( 'GE', ' ', ' ', 1, N, X, 1, XX, ABS( INCX ), $ 0, N - 1, RESET, TRANSL ) IF( N.GT.1 )THEN X( N/2 ) = ZERO XX( 1 + ABS( INCX )*( N/2 - 1 ) ) = ZERO END IF C DO 70 IA = 1, NALF ALPHA = ALF( IA ) NULL = N.LE.0.OR.ALPHA.EQ.ZERO C C Generate the matrix A. C TRANSL = ZERO CALL SMAKE2( SNAME( 2: 3 ), UPLO, ' ', N, N, A, NMAX, $ AA, LDA, N - 1, N - 1, RESET, TRANSL ) C NC = NC + 1 C C Save every datum before calling the subroutine. C UPLOS = UPLO NS = N ALS = ALPHA DO 10 I = 1, LAA AS( I ) = AA( I ) 10 CONTINUE LDAS = LDA DO 20 I = 1, LX XS( I ) = XX( I ) 20 CONTINUE INCXS = INCX C C Call the subroutine. C IF( FULL )THEN CALL SSYR( UPLO, N, ALPHA, XX, INCX, AA, LDA ) ELSE IF( PACKED )THEN CALL SSPR( UPLO, N, ALPHA, XX, INCX, AA ) END IF C C Check if error-exit was taken incorrectly. C IF (NUMXER(NERR) .NE. 0) THEN IF (KPRINT .GE. 2) THEN WRITE( NOUT, FMT = 9992 ) ENDIF FATAL = .TRUE. END IF C C See what data changed inside subroutines. C ISAME( 1 ) = UPLO.EQ.UPLOS ISAME( 2 ) = NS.EQ.N ISAME( 3 ) = ALS.EQ.ALPHA ISAME( 4 ) = LSE( XS, XX, LX ) ISAME( 5 ) = INCXS.EQ.INCX IF( NULL )THEN ISAME( 6 ) = LSE( AS, AA, LAA ) ELSE ISAME( 6 ) = LSERES( SNAME( 2: 3 ), UPLO, N, N, AS, $ AA, LDA ) END IF IF( .NOT.PACKED )THEN ISAME( 7 ) = LDAS.EQ.LDA END IF C C If data was incorrectly changed, report and 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 IF( .NOT.NULL )THEN C C Check the result column by column. C IF( INCX.GT.0 )THEN DO 40 I = 1, N Z( I ) = X( I ) 40 CONTINUE ELSE DO 50 I = 1, N Z( I ) = X( N - I + 1 ) 50 CONTINUE END IF JA = 1 DO 60 J = 1, N W( 1 ) = Z( J ) IF( UPPER )THEN JJ = 1 LJ = J ELSE JJ = J LJ = N - J + 1 END IF FTL = .FALSE. CALL SMVCH( 'N', LJ, 1, ALPHA, Z( JJ ), LJ, W, $ 1, ONE, A( JJ, J ), 1, YT, G, $ AA( JA ), EPS, ERR, FTL, NOUT, $ .TRUE., KPRINT ) IF( FULL )THEN IF( UPPER )THEN JA = JA + LDA ELSE JA = JA + LDA + 1 END IF ELSE JA = JA + LJ END IF ERRMAX = MAX( ERRMAX, ERR ) IF (FTL) THEN FATAL = .TRUE. IF (KPRINT .GE. 3) THEN WRITE( NOUT, FMT = 9995 )J WRITE( NOUT, FMT = 9996 )SNAME IF( FULL )THEN WRITE( NOUT, FMT = 9993 )NC, SNAME, $ UPLO, N, ALPHA, INCX, $ LDA ELSE IF( PACKED )THEN WRITE( NOUT, FMT = 9994 )NC, SNAME, $ UPLO, N, ALPHA, INCX END IF ENDIF ENDIF 60 CONTINUE END IF 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( ' THESE ARE THE RESULTS FOR COLUMN ', I3 ) 9994 FORMAT( 1X, I6, ': ', A6, '(''', A1, ''',', I3, ',', F4.1, ', X,', $ I2, ', AP) .' ) 9993 FORMAT( 1X, I6, ': ', A6, '(''', A1, ''',', I3, ',', F4.1, ', X,', $ I2, ', A,', I3, ') .' ) 9992 FORMAT( ' ******* FATAL ERROR - ERROR-EXIT TAKEN ON VALID CALL *', $ '******' ) C C End of SCHK52. C END