dblat2.f

*  -- Written on 10-August-1987.
*     Richard Hanson, Sandia National Labs.
*     Jeremy Du Croz, NAG Central Office.
*
*     .. Scalar Arguments ..
      LOGICAL            RESET
*     .. Local Scalars ..
      INTEGER            I, IC, MI
*     .. Save statement ..
      SAVE               I, IC, MI
*     .. Intrinsic Functions ..
      INTRINSIC          DBLE
*     .. Executable Statements ..
      IF( RESET )THEN
*        Initialize local variables.
         MI = 891
         I = 7
         IC = 0
         RESET = .FALSE.
      END IF
*
*     The sequence of values of I is bounded between 1 and 999.
*     If initial I = 1,2,3,6,7 or 9, the period will be 50.
*     If initial I = 4 or 8, the period will be 25.
*     If initial I = 5, the period will be 10.
*     IC is used to break up the period by skipping 1 value of I in 6.
*
      IC = IC + 1
   10 I = I*MI
      I = I - 1000*( I/1000 )
      IF( IC.GE.5 )THEN
         IC = 0
         GO TO 10
      END IF
      DBEG = DBLE( I - 500 )/1001.0D0
      RETURN
*
*     End of DBEG.
*
      END
      DOUBLE PRECISION FUNCTION DDIFF( X, Y )
*
*  Auxiliary routine for test program for Level 2 Blas.
*
*  -- Written on 10-August-1987.
*     Richard Hanson, Sandia National Labs.
*
*     .. Scalar Arguments ..
      DOUBLE PRECISION   X, Y
*     .. Executable Statements ..
      DDIFF = X - Y
      RETURN
*
*     End of DDIFF.
*
      END
      SUBROUTINE CHKXER( SRNAMT, INFOT, NOUT, LERR, OK )
*
*  Tests whether XERBLA has detected an error when it should.
*
*  Auxiliary routine for test program for Level 2 Blas.
*
*  -- Written on 10-August-1987.
*     Richard Hanson, Sandia National Labs.
*     Jeremy Du Croz, NAG Central Office.
*
*     .. Scalar Arguments ..
      INTEGER            INFOT, NOUT
      LOGICAL            LERR, OK
      CHARACTER*6        SRNAMT
*     .. Executable Statements ..
      IF( .NOT.LERR )THEN
         WRITE( NOUT, FMT = 9999 )INFOT, SRNAMT
         OK = .FALSE.
      END IF
      LERR = .FALSE.
      RETURN
*
 9999 FORMAT( ' ***** ILLEGAL VALUE OF PARAMETER NUMBER ', I2, ' NOT D',
     $      'ETECTED BY ', A6, ' *****' )
*
*     End of CHKXER.
*
      END
      SUBROUTINE XERBLA( SRNAME, INFO )
*
*  This is a special version of XERBLA to be used only as part of
*  the test program for testing error exits from the Level 2 BLAS
*  routines.
*
*  XERBLA  is an error handler for the Level 2 BLAS routines.
*
*  It is called by the Level 2 BLAS routines if an input parameter is
*  invalid.
*
*  Auxiliary routine for test program for Level 2 Blas.
*
*  -- Written on 10-August-1987.
*     Richard Hanson, Sandia National Labs.
*     Jeremy Du Croz, NAG Central Office.
*
*     .. Scalar Arguments ..
      INTEGER            INFO
      CHARACTER*6        SRNAME
*     .. Scalars in Common ..
      INTEGER            INFOT, NOUT
      LOGICAL            LERR, OK
      CHARACTER*6        SRNAMT
*     .. Common blocks ..
      COMMON             /INFOC/INFOT, NOUT, OK, LERR
      COMMON             /SRNAMC/SRNAMT
*     .. Executable Statements ..
      LERR = .TRUE.
      IF( INFO.NE.INFOT )THEN
         IF( INFOT.NE.0 )THEN
            WRITE( NOUT, FMT = 9999 )INFO, INFOT
         ELSE
            WRITE( NOUT, FMT = 9997 )INFO
         END IF
         OK = .FALSE.
      END IF
      IF( SRNAME.NE.SRNAMT )THEN
         WRITE( NOUT, FMT = 9998 )SRNAME, SRNAMT
         OK = .FALSE.
      END IF
      RETURN
*
 9999 FORMAT( ' ******* XERBLA WAS CALLED WITH INFO = ', I6, ' INSTEAD',
     $      ' OF ', I2, ' *******' )
 9998 FORMAT( ' ******* XERBLA WAS CALLED WITH SRNAME = ', A6, ' INSTE',
     $      'AD OF ', A6, ' *******' )
 9997 FORMAT( ' ******* XERBLA WAS CALLED WITH INFO = ', I6,
     $      ' *******' )
*
*     End of XERBLA
*
      END