dblat3.f

      PROGRAM DBLAT3
*
*  Test program for the DOUBLE PRECISION Level 3 Blas.
*
*  The program must be driven by a short data file. The first 14 records
*  of the file are read using list-directed input, the last 6 records
*  are read using the format ( A6, L2 ). An annotated example of a data
*  file can be obtained by deleting the first 3 characters from the
*  following 20 lines:
*  'DBLAT3.SUMM'     NAME OF SUMMARY OUTPUT FILE
*  6                 UNIT NUMBER OF SUMMARY FILE
*  'DBLAT3.SNAP'     NAME OF SNAPSHOT OUTPUT FILE
*  -1                UNIT NUMBER OF SNAPSHOT FILE (NOT USED IF .LT. 0)
*  F        LOGICAL FLAG, T TO REWIND SNAPSHOT FILE AFTER EACH RECORD.
*  F        LOGICAL FLAG, T TO STOP ON FAILURES.
*  T        LOGICAL FLAG, T TO TEST ERROR EXITS.
*  16.0     THRESHOLD VALUE OF TEST RATIO
*  6                 NUMBER OF VALUES OF N
*  0 1 2 3 5 9       VALUES OF N
*  3                 NUMBER OF VALUES OF ALPHA
*  0.0 1.0 0.7       VALUES OF ALPHA
*  3                 NUMBER OF VALUES OF BETA
*  0.0 1.0 1.3       VALUES OF BETA
*  DGEMM  T PUT F FOR NO TEST. SAME COLUMNS.
*  DSYMM  T PUT F FOR NO TEST. SAME COLUMNS.
*  DTRMM  T PUT F FOR NO TEST. SAME COLUMNS.
*  DTRSM  T PUT F FOR NO TEST. SAME COLUMNS.
*  DSYRK  T PUT F FOR NO TEST. SAME COLUMNS.
*  DSYR2K T PUT F FOR NO TEST. SAME COLUMNS.
*
*  See:
*
*     Dongarra J. J., Du Croz J. J., Duff I. S. and Hammarling S.
*     A Set of Level 3 Basic Linear Algebra Subprograms.
*
*     Technical Memorandum No.88 (Revision 1), Mathematics and
*     Computer Science Division, Argonne National Laboratory, 9700
*     South Cass Avenue, Argonne, Illinois 60439, US.
*
*  -- Written on 8-February-1989.
*     Jack Dongarra, Argonne National Laboratory.
*     Iain Duff, AERE Harwell.
*     Jeremy Du Croz, Numerical Algorithms Group Ltd.
*     Sven Hammarling, Numerical Algorithms Group Ltd.
*
*     .. Parameters ..
      INTEGER            NIN
      PARAMETER          ( NIN = 5 )
      INTEGER            NSUBS
      PARAMETER          ( NSUBS = 6 )
      DOUBLE PRECISION   ZERO, HALF, ONE
      PARAMETER          ( ZERO = 0.0D0, HALF = 0.5D0, ONE = 1.0D0 )
      INTEGER            NMAX
      PARAMETER          ( NMAX = 65 )
      INTEGER            NIDMAX, NALMAX, NBEMAX
      PARAMETER          ( NIDMAX = 9, NALMAX = 7, NBEMAX = 7 )
*     .. Local Scalars ..
      DOUBLE PRECISION   EPS, ERR, THRESH
      INTEGER            I, ISNUM, J, N, NALF, NBET, NIDIM, NOUT, NTRA
      LOGICAL            FATAL, LTESTT, REWI, SAME, SFATAL, TRACE,
     $                   TSTERR
      CHARACTER*1        TRANSA, TRANSB
      CHARACTER*6        SNAMET
      CHARACTER*32       SNAPS, SUMMRY
*     .. Local Arrays ..
      DOUBLE PRECISION   AA( NMAX*NMAX ), AB( NMAX, 2*NMAX ),
     $                   ALF( NALMAX ), AS( NMAX*NMAX ),
     $                   BB( NMAX*NMAX ), BET( NBEMAX ),
     $                   BS( NMAX*NMAX ), C( NMAX, NMAX ),
     $                   CC( NMAX*NMAX ), CS( NMAX*NMAX ), CT( NMAX ),
     $                   G( NMAX ), W( 2*NMAX )
      INTEGER            IDIM( NIDMAX )
      LOGICAL            LTEST( NSUBS )
      CHARACTER*6        SNAMES( NSUBS )
*     .. External Functions ..
      DOUBLE PRECISION   DDIFF
      LOGICAL            LDE
      EXTERNAL           DDIFF, LDE
*     .. External Subroutines ..
      EXTERNAL           DCHK1, DCHK2, DCHK3, DCHK4, DCHK5, DCHKE, DMMCH
*     .. Intrinsic Functions ..
      INTRINSIC          MAX, MIN
*     .. Scalars in Common ..
      INTEGER            INFOT, NOUTC
      LOGICAL            LERR, OK
      CHARACTER*6        SRNAMT
*     .. Common blocks ..
      COMMON             /INFOC/INFOT, NOUTC, OK, LERR
      COMMON             /SRNAMC/SRNAMT
*     .. Data statements ..
      DATA               SNAMES/'DGEMM ', 'DSYMM ', 'DTRMM ', 'DTRSM ',
     $                   'DSYRK ', 'DSYR2K'/
*     .. Executable Statements ..
*
*     Read name and unit number for summary output file and open file.
*
      READ( NIN, FMT = * )SUMMRY
      READ( NIN, FMT = * )NOUT
      OPEN( NOUT, FILE = SUMMRY, STATUS = 'NEW' )
      NOUTC = NOUT
*
*     Read name and unit number for snapshot output file and open file.
*
      READ( NIN, FMT = * )SNAPS
      READ( NIN, FMT = * )NTRA
      TRACE = NTRA.GE.0
      IF( TRACE )THEN
         OPEN( NTRA, FILE = SNAPS, STATUS = 'NEW' )
      END IF
*     Read the flag that directs rewinding of the snapshot file.
      READ( NIN, FMT = * )REWI
      REWI = REWI.AND.TRACE
*     Read the flag that directs stopping on any failure.
      READ( NIN, FMT = * )SFATAL
*     Read the flag that indicates whether error exits are to be tested.
      READ( NIN, FMT = * )TSTERR
*     Read the threshold value of the test ratio
      READ( NIN, FMT = * )THRESH
*
*     Read and check the parameter values for the tests.
*
*     Values of N
      READ( NIN, FMT = * )NIDIM
      IF( NIDIM.LT.1.OR.NIDIM.GT.NIDMAX )THEN
         WRITE( NOUT, FMT = 9997 )'N', NIDMAX
         GO TO 220
      END IF
      READ( NIN, FMT = * )( IDIM( I ), I = 1, NIDIM )
      DO 10 I = 1, NIDIM
         IF( IDIM( I ).LT.0.OR.IDIM( I ).GT.NMAX )THEN
            WRITE( NOUT, FMT = 9996 )NMAX
            GO TO 220
         END IF
   10 CONTINUE
*     Values of ALPHA
      READ( NIN, FMT = * )NALF
      IF( NALF.LT.1.OR.NALF.GT.NALMAX )THEN
         WRITE( NOUT, FMT = 9997 )'ALPHA', NALMAX
         GO TO 220
      END IF
      READ( NIN, FMT = * )( ALF( I ), I = 1, NALF )
*     Values of BETA
      READ( NIN, FMT = * )NBET
      IF( NBET.LT.1.OR.NBET.GT.NBEMAX )THEN
         WRITE( NOUT, FMT = 9997 )'BETA', NBEMAX
         GO TO 220
      END IF
      READ( NIN, FMT = * )( BET( I ), I = 1, NBET )
*
*     Report values of parameters.
*
      WRITE( NOUT, FMT = 9995 )
      WRITE( NOUT, FMT = 9994 )( IDIM( I ), I = 1, NIDIM )
      WRITE( NOUT, FMT = 9993 )( ALF( I ), I = 1, NALF )
      WRITE( NOUT, FMT = 9992 )( BET( I ), I = 1, NBET )
      IF( .NOT.TSTERR )THEN
         WRITE( NOUT, FMT = * )
         WRITE( NOUT, FMT = 9984 )
      END IF
      WRITE( NOUT, FMT = * )
      WRITE( NOUT, FMT = 9999 )THRESH
      WRITE( NOUT, FMT = * )
*
*     Read names of subroutines and flags which indicate
*     whether they are to be tested.
*
      DO 20 I = 1, NSUBS
         LTEST( I ) = .FALSE.
   20 CONTINUE
   30 READ( NIN, FMT = 9988, END = 60 )SNAMET, LTESTT
      DO 40 I = 1, NSUBS
         IF( SNAMET.EQ.SNAMES( I ) )
     $      GO TO 50
   40 CONTINUE
      WRITE( NOUT, FMT = 9990 )SNAMET
      STOP
   50 LTEST( I ) = LTESTT
      GO TO 30
*
   60 CONTINUE
      CLOSE ( NIN )
*
*     Compute EPS (the machine precision).
*
      EPS = ONE
   70 CONTINUE
      IF( DDIFF( ONE + EPS, ONE ).EQ.ZERO )
     $   GO TO 80
      EPS = HALF*EPS
      GO TO 70
   80 CONTINUE
      EPS = EPS + EPS
      WRITE( NOUT, FMT = 9998 )EPS
*
*     Check the reliability of DMMCH using exact data.
*
      N = MIN( 32, NMAX )
      DO 100 J = 1, N
         DO 90 I = 1, N
            AB( I, J ) = MAX( I - J + 1, 0 )