553 lines
		
	
	
		
			18 KiB
		
	
	
	
		
			Fortran
		
	
	
	
			
		
		
	
	
			553 lines
		
	
	
		
			18 KiB
		
	
	
	
		
			Fortran
		
	
	
	
*> \brief \b DCHKTP
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*
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*  =========== DOCUMENTATION ===========
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*
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* Online html documentation available at
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*            http://www.netlib.org/lapack/explore-html/
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*
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*  Definition:
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*  ===========
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*
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*       SUBROUTINE DCHKTP( DOTYPE, NN, NVAL, NNS, NSVAL, THRESH, TSTERR,
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*                          NMAX, AP, AINVP, B, X, XACT, WORK, RWORK,
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*                          IWORK, NOUT )
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*
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*       .. Scalar Arguments ..
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*       LOGICAL            TSTERR
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*       INTEGER            NMAX, NN, NNS, NOUT
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*       DOUBLE PRECISION   THRESH
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*       ..
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*       .. Array Arguments ..
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*       LOGICAL            DOTYPE( * )
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*       INTEGER            IWORK( * ), NSVAL( * ), NVAL( * )
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*       DOUBLE PRECISION   AINVP( * ), AP( * ), B( * ), RWORK( * ),
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*      $                   WORK( * ), X( * ), XACT( * )
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*       ..
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*
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*
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*> \par Purpose:
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*  =============
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*>
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*> \verbatim
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*>
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*> DCHKTP tests DTPTRI, -TRS, -RFS, and -CON, and DLATPS
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*> \endverbatim
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*
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*  Arguments:
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*  ==========
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*
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*> \param[in] DOTYPE
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*> \verbatim
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*>          DOTYPE is LOGICAL array, dimension (NTYPES)
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*>          The matrix types to be used for testing.  Matrices of type j
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*>          (for 1 <= j <= NTYPES) are used for testing if DOTYPE(j) =
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*>          .TRUE.; if DOTYPE(j) = .FALSE., then type j is not used.
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*> \endverbatim
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*>
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*> \param[in] NN
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*> \verbatim
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*>          NN is INTEGER
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*>          The number of values of N contained in the vector NVAL.
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*> \endverbatim
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*>
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*> \param[in] NVAL
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*> \verbatim
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*>          NVAL is INTEGER array, dimension (NN)
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*>          The values of the matrix column dimension N.
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*> \endverbatim
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*>
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*> \param[in] NNS
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*> \verbatim
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*>          NNS is INTEGER
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*>          The number of values of NRHS contained in the vector NSVAL.
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*> \endverbatim
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*>
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*> \param[in] NSVAL
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*> \verbatim
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*>          NSVAL is INTEGER array, dimension (NNS)
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*>          The values of the number of right hand sides NRHS.
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*> \endverbatim
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*>
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*> \param[in] THRESH
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*> \verbatim
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*>          THRESH is DOUBLE PRECISION
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*>          The threshold value for the test ratios.  A result is
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*>          included in the output file if RESULT >= THRESH.  To have
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*>          every test ratio printed, use THRESH = 0.
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*> \endverbatim
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*>
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*> \param[in] TSTERR
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*> \verbatim
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*>          TSTERR is LOGICAL
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*>          Flag that indicates whether error exits are to be tested.
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*> \endverbatim
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*>
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*> \param[in] NMAX
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*> \verbatim
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*>          NMAX is INTEGER
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*>          The leading dimension of the work arrays.  NMAX >= the
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*>          maximumm value of N in NVAL.
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*> \endverbatim
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*>
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*> \param[out] AP
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*> \verbatim
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*>          AP is DOUBLE PRECISION array, dimension
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*>                      (NMAX*(NMAX+1)/2)
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*> \endverbatim
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*>
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*> \param[out] AINVP
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*> \verbatim
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*>          AINVP is DOUBLE PRECISION array, dimension
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*>                      (NMAX*(NMAX+1)/2)
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*> \endverbatim
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*>
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*> \param[out] B
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*> \verbatim
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*>          B is DOUBLE PRECISION array, dimension (NMAX*NSMAX)
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*>          where NSMAX is the largest entry in NSVAL.
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*> \endverbatim
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*>
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*> \param[out] X
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*> \verbatim
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*>          X is DOUBLE PRECISION array, dimension (NMAX*NSMAX)
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*> \endverbatim
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*>
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*> \param[out] XACT
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*> \verbatim
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*>          XACT is DOUBLE PRECISION array, dimension (NMAX*NSMAX)
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*> \endverbatim
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*>
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*> \param[out] WORK
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*> \verbatim
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*>          WORK is DOUBLE PRECISION array, dimension
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*>                      (NMAX*max(3,NSMAX))
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*> \endverbatim
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*>
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*> \param[out] IWORK
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*> \verbatim
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*>          IWORK is INTEGER array, dimension (NMAX)
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*> \endverbatim
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*>
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*> \param[out] RWORK
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*> \verbatim
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*>          RWORK is DOUBLE PRECISION array, dimension
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*>                      (max(NMAX,2*NSMAX))
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*> \endverbatim
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*>
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*> \param[in] NOUT
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*> \verbatim
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*>          NOUT is INTEGER
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*>          The unit number for output.
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*> \endverbatim
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*
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*  Authors:
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*  ========
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*
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*> \author Univ. of Tennessee
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*> \author Univ. of California Berkeley
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*> \author Univ. of Colorado Denver
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*> \author NAG Ltd.
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*
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*> \ingroup double_lin
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*
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*  =====================================================================
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      SUBROUTINE DCHKTP( DOTYPE, NN, NVAL, NNS, NSVAL, THRESH, TSTERR,
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     $                   NMAX, AP, AINVP, B, X, XACT, WORK, RWORK,
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     $                   IWORK, NOUT )
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*
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*  -- LAPACK test routine --
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*  -- LAPACK is a software package provided by Univ. of Tennessee,    --
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*  -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
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*
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*     .. Scalar Arguments ..
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      LOGICAL            TSTERR
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      INTEGER            NMAX, NN, NNS, NOUT
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      DOUBLE PRECISION   THRESH
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*     ..
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*     .. Array Arguments ..
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      LOGICAL            DOTYPE( * )
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      INTEGER            IWORK( * ), NSVAL( * ), NVAL( * )
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      DOUBLE PRECISION   AINVP( * ), AP( * ), B( * ), RWORK( * ),
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     $                   WORK( * ), X( * ), XACT( * )
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*     ..
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*
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*  =====================================================================
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*
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*     .. Parameters ..
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      INTEGER            NTYPE1, NTYPES
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      PARAMETER          ( NTYPE1 = 10, NTYPES = 18 )
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      INTEGER            NTESTS
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      PARAMETER          ( NTESTS = 9 )
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      INTEGER            NTRAN
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      PARAMETER          ( NTRAN = 3 )
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      DOUBLE PRECISION   ONE, ZERO
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      PARAMETER          ( ONE = 1.0D+0, ZERO = 0.0D+0 )
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*     ..
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*     .. Local Scalars ..
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      CHARACTER          DIAG, NORM, TRANS, UPLO, XTYPE
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      CHARACTER*3        PATH
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      INTEGER            I, IDIAG, IMAT, IN, INFO, IRHS, ITRAN, IUPLO,
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     $                   K, LAP, LDA, N, NERRS, NFAIL, NRHS, NRUN
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      DOUBLE PRECISION   AINVNM, ANORM, RCOND, RCONDC, RCONDI, RCONDO,
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     $                   SCALE
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*     ..
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*     .. Local Arrays ..
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      CHARACTER          TRANSS( NTRAN ), UPLOS( 2 )
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      INTEGER            ISEED( 4 ), ISEEDY( 4 )
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      DOUBLE PRECISION   RESULT( NTESTS )
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*     ..
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*     .. External Functions ..
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      LOGICAL            LSAME
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      DOUBLE PRECISION   DLANTP
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      EXTERNAL           LSAME, DLANTP
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*     ..
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*     .. External Subroutines ..
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      EXTERNAL           ALAERH, ALAHD, ALASUM, DCOPY, DERRTR, DGET04,
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     $                   DLACPY, DLARHS, DLATPS, DLATTP, DTPCON, DTPRFS,
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     $                   DTPT01, DTPT02, DTPT03, DTPT05, DTPT06, DTPTRI,
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     $                   DTPTRS
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*     ..
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*     .. Scalars in Common ..
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      LOGICAL            LERR, OK
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      CHARACTER*32       SRNAMT
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      INTEGER            INFOT, IOUNIT
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*     ..
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*     .. Common blocks ..
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      COMMON             / INFOC / INFOT, IOUNIT, OK, LERR
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      COMMON             / SRNAMC / SRNAMT
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*     ..
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*     .. Intrinsic Functions ..
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      INTRINSIC          MAX
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*     ..
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*     .. Data statements ..
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      DATA               ISEEDY / 1988, 1989, 1990, 1991 /
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      DATA               UPLOS / 'U', 'L' / , TRANSS / 'N', 'T', 'C' /
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*     ..
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*     .. Executable Statements ..
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*
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*     Initialize constants and the random number seed.
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*
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      PATH( 1: 1 ) = 'Double precision'
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      PATH( 2: 3 ) = 'TP'
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      NRUN = 0
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      NFAIL = 0
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      NERRS = 0
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      DO 10 I = 1, 4
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         ISEED( I ) = ISEEDY( I )
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   10 CONTINUE
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*
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*     Test the error exits
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*
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      IF( TSTERR )
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     $   CALL DERRTR( PATH, NOUT )
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      INFOT = 0
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*
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      DO 110 IN = 1, NN
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*
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*        Do for each value of N in NVAL
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*
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         N = NVAL( IN )
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         LDA = MAX( 1, N )
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         LAP = LDA*( LDA+1 ) / 2
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         XTYPE = 'N'
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*
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         DO 70 IMAT = 1, NTYPE1
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*
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*           Do the tests only if DOTYPE( IMAT ) is true.
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*
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            IF( .NOT.DOTYPE( IMAT ) )
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     $         GO TO 70
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*
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            DO 60 IUPLO = 1, 2
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*
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*              Do first for UPLO = 'U', then for UPLO = 'L'
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*
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               UPLO = UPLOS( IUPLO )
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*
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*              Call DLATTP to generate a triangular test matrix.
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*
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               SRNAMT = 'DLATTP'
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               CALL DLATTP( IMAT, UPLO, 'No transpose', DIAG, ISEED, N,
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     $                      AP, X, WORK, INFO )
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*
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*              Set IDIAG = 1 for non-unit matrices, 2 for unit.
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*
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               IF( LSAME( DIAG, 'N' ) ) THEN
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                  IDIAG = 1
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               ELSE
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                  IDIAG = 2
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               END IF
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*
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*+    TEST 1
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*              Form the inverse of A.
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*
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               IF( N.GT.0 )
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     $            CALL DCOPY( LAP, AP, 1, AINVP, 1 )
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               SRNAMT = 'DTPTRI'
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               CALL DTPTRI( UPLO, DIAG, N, AINVP, INFO )
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*
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*              Check error code from DTPTRI.
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*
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               IF( INFO.NE.0 )
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     $            CALL ALAERH( PATH, 'DTPTRI', INFO, 0, UPLO // DIAG, N,
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     $                         N, -1, -1, -1, IMAT, NFAIL, NERRS, NOUT )
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*
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*              Compute the infinity-norm condition number of A.
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*
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               ANORM = DLANTP( 'I', UPLO, DIAG, N, AP, RWORK )
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               AINVNM = DLANTP( 'I', UPLO, DIAG, N, AINVP, RWORK )
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               IF( ANORM.LE.ZERO .OR. AINVNM.LE.ZERO ) THEN
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                  RCONDI = ONE
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               ELSE
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                  RCONDI = ( ONE / ANORM ) / AINVNM
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               END IF
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*
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*              Compute the residual for the triangular matrix times its
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*              inverse.  Also compute the 1-norm condition number of A.
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*
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               CALL DTPT01( UPLO, DIAG, N, AP, AINVP, RCONDO, RWORK,
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     $                      RESULT( 1 ) )
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*
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*              Print the test ratio if it is .GE. THRESH.
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*
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               IF( RESULT( 1 ).GE.THRESH ) THEN
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                  IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
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     $               CALL ALAHD( NOUT, PATH )
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                  WRITE( NOUT, FMT = 9999 )UPLO, DIAG, N, IMAT, 1,
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     $               RESULT( 1 )
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                  NFAIL = NFAIL + 1
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               END IF
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               NRUN = NRUN + 1
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*
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               DO 40 IRHS = 1, NNS
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                  NRHS = NSVAL( IRHS )
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                  XTYPE = 'N'
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*
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                  DO 30 ITRAN = 1, NTRAN
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*
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*                 Do for op(A) = A, A**T, or A**H.
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*
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                     TRANS = TRANSS( ITRAN )
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                     IF( ITRAN.EQ.1 ) THEN
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                        NORM = 'O'
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                        RCONDC = RCONDO
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                     ELSE
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                        NORM = 'I'
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                        RCONDC = RCONDI
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                     END IF
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*
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*+    TEST 2
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*                 Solve and compute residual for op(A)*x = b.
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*
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                     SRNAMT = 'DLARHS'
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                     CALL DLARHS( PATH, XTYPE, UPLO, TRANS, N, N, 0,
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     $                            IDIAG, NRHS, AP, LAP, XACT, LDA, B,
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     $                            LDA, ISEED, INFO )
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                     XTYPE = 'C'
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                     CALL DLACPY( 'Full', N, NRHS, B, LDA, X, LDA )
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*
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                     SRNAMT = 'DTPTRS'
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                     CALL DTPTRS( UPLO, TRANS, DIAG, N, NRHS, AP, X,
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     $                            LDA, INFO )
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*
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*                 Check error code from DTPTRS.
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*
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                     IF( INFO.NE.0 )
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     $                  CALL ALAERH( PATH, 'DTPTRS', INFO, 0,
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     $                               UPLO // TRANS // DIAG, N, N, -1,
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     $                               -1, -1, IMAT, NFAIL, NERRS, NOUT )
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*
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                     CALL DTPT02( UPLO, TRANS, DIAG, N, NRHS, AP, X,
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     $                            LDA, B, LDA, WORK, RESULT( 2 ) )
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*
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*+    TEST 3
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*                 Check solution from generated exact solution.
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*
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                     CALL DGET04( N, NRHS, X, LDA, XACT, LDA, RCONDC,
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     $                            RESULT( 3 ) )
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*
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*+    TESTS 4, 5, and 6
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*                 Use iterative refinement to improve the solution and
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*                 compute error bounds.
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*
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                     SRNAMT = 'DTPRFS'
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                     CALL DTPRFS( UPLO, TRANS, DIAG, N, NRHS, AP, B,
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     $                            LDA, X, LDA, RWORK, RWORK( NRHS+1 ),
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     $                            WORK, IWORK, INFO )
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*
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*                 Check error code from DTPRFS.
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*
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                     IF( INFO.NE.0 )
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     $                  CALL ALAERH( PATH, 'DTPRFS', INFO, 0,
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     $                               UPLO // TRANS // DIAG, N, N, -1,
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     $                               -1, NRHS, IMAT, NFAIL, NERRS,
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     $                               NOUT )
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*
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                     CALL DGET04( N, NRHS, X, LDA, XACT, LDA, RCONDC,
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     $                            RESULT( 4 ) )
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                     CALL DTPT05( UPLO, TRANS, DIAG, N, NRHS, AP, B,
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     $                            LDA, X, LDA, XACT, LDA, RWORK,
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     $                            RWORK( NRHS+1 ), RESULT( 5 ) )
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*
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*                    Print information about the tests that did not pass
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*                    the threshold.
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*
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                     DO 20 K = 2, 6
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                        IF( RESULT( K ).GE.THRESH ) THEN
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                           IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
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     $                        CALL ALAHD( NOUT, PATH )
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                           WRITE( NOUT, FMT = 9998 )UPLO, TRANS, DIAG,
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     $                        N, NRHS, IMAT, K, RESULT( K )
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                           NFAIL = NFAIL + 1
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                        END IF
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   20                CONTINUE
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                     NRUN = NRUN + 5
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   30             CONTINUE
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   40          CONTINUE
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*
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*+    TEST 7
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*                 Get an estimate of RCOND = 1/CNDNUM.
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*
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               DO 50 ITRAN = 1, 2
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                  IF( ITRAN.EQ.1 ) THEN
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                     NORM = 'O'
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                     RCONDC = RCONDO
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                  ELSE
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                     NORM = 'I'
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                     RCONDC = RCONDI
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                  END IF
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*
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                  SRNAMT = 'DTPCON'
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                  CALL DTPCON( NORM, UPLO, DIAG, N, AP, RCOND, WORK,
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     $                         IWORK, INFO )
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*
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*                 Check error code from DTPCON.
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*
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                  IF( INFO.NE.0 )
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     $               CALL ALAERH( PATH, 'DTPCON', INFO, 0,
 | 
						|
     $                            NORM // UPLO // DIAG, N, N, -1, -1,
 | 
						|
     $                            -1, IMAT, NFAIL, NERRS, NOUT )
 | 
						|
*
 | 
						|
                  CALL DTPT06( RCOND, RCONDC, UPLO, DIAG, N, AP, RWORK,
 | 
						|
     $                         RESULT( 7 ) )
 | 
						|
*
 | 
						|
*                 Print the test ratio if it is .GE. THRESH.
 | 
						|
*
 | 
						|
                  IF( RESULT( 7 ).GE.THRESH ) THEN
 | 
						|
                     IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
 | 
						|
     $                  CALL ALAHD( NOUT, PATH )
 | 
						|
                     WRITE( NOUT, FMT = 9997 ) 'DTPCON', NORM, UPLO,
 | 
						|
     $                  DIAG, N, IMAT, 7, RESULT( 7 )
 | 
						|
                     NFAIL = NFAIL + 1
 | 
						|
                  END IF
 | 
						|
                  NRUN = NRUN + 1
 | 
						|
   50          CONTINUE
 | 
						|
   60       CONTINUE
 | 
						|
   70    CONTINUE
 | 
						|
*
 | 
						|
*        Use pathological test matrices to test DLATPS.
 | 
						|
*
 | 
						|
         DO 100 IMAT = NTYPE1 + 1, NTYPES
 | 
						|
*
 | 
						|
*           Do the tests only if DOTYPE( IMAT ) is true.
 | 
						|
*
 | 
						|
            IF( .NOT.DOTYPE( IMAT ) )
 | 
						|
     $         GO TO 100
 | 
						|
*
 | 
						|
            DO 90 IUPLO = 1, 2
 | 
						|
*
 | 
						|
*              Do first for UPLO = 'U', then for UPLO = 'L'
 | 
						|
*
 | 
						|
               UPLO = UPLOS( IUPLO )
 | 
						|
               DO 80 ITRAN = 1, NTRAN
 | 
						|
*
 | 
						|
*                 Do for op(A) = A, A**T, or A**H.
 | 
						|
*
 | 
						|
                  TRANS = TRANSS( ITRAN )
 | 
						|
*
 | 
						|
*                 Call DLATTP to generate a triangular test matrix.
 | 
						|
*
 | 
						|
                  SRNAMT = 'DLATTP'
 | 
						|
                  CALL DLATTP( IMAT, UPLO, TRANS, DIAG, ISEED, N, AP, X,
 | 
						|
     $                         WORK, INFO )
 | 
						|
*
 | 
						|
*+    TEST 8
 | 
						|
*                 Solve the system op(A)*x = b.
 | 
						|
*
 | 
						|
                  SRNAMT = 'DLATPS'
 | 
						|
                  CALL DCOPY( N, X, 1, B, 1 )
 | 
						|
                  CALL DLATPS( UPLO, TRANS, DIAG, 'N', N, AP, B, SCALE,
 | 
						|
     $                         RWORK, INFO )
 | 
						|
*
 | 
						|
*                 Check error code from DLATPS.
 | 
						|
*
 | 
						|
                  IF( INFO.NE.0 )
 | 
						|
     $               CALL ALAERH( PATH, 'DLATPS', INFO, 0,
 | 
						|
     $                            UPLO // TRANS // DIAG // 'N', N, N,
 | 
						|
     $                            -1, -1, -1, IMAT, NFAIL, NERRS, NOUT )
 | 
						|
*
 | 
						|
                  CALL DTPT03( UPLO, TRANS, DIAG, N, 1, AP, SCALE,
 | 
						|
     $                         RWORK, ONE, B, LDA, X, LDA, WORK,
 | 
						|
     $                         RESULT( 8 ) )
 | 
						|
*
 | 
						|
*+    TEST 9
 | 
						|
*                 Solve op(A)*x = b again with NORMIN = 'Y'.
 | 
						|
*
 | 
						|
                  CALL DCOPY( N, X, 1, B( N+1 ), 1 )
 | 
						|
                  CALL DLATPS( UPLO, TRANS, DIAG, 'Y', N, AP, B( N+1 ),
 | 
						|
     $                         SCALE, RWORK, INFO )
 | 
						|
*
 | 
						|
*                 Check error code from DLATPS.
 | 
						|
*
 | 
						|
                  IF( INFO.NE.0 )
 | 
						|
     $               CALL ALAERH( PATH, 'DLATPS', INFO, 0,
 | 
						|
     $                            UPLO // TRANS // DIAG // 'Y', N, N,
 | 
						|
     $                            -1, -1, -1, IMAT, NFAIL, NERRS, NOUT )
 | 
						|
*
 | 
						|
                  CALL DTPT03( UPLO, TRANS, DIAG, N, 1, AP, SCALE,
 | 
						|
     $                         RWORK, ONE, B( N+1 ), LDA, X, LDA, WORK,
 | 
						|
     $                         RESULT( 9 ) )
 | 
						|
*
 | 
						|
*                 Print information about the tests that did not pass
 | 
						|
*                 the threshold.
 | 
						|
*
 | 
						|
                  IF( RESULT( 8 ).GE.THRESH ) THEN
 | 
						|
                     IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
 | 
						|
     $                  CALL ALAHD( NOUT, PATH )
 | 
						|
                     WRITE( NOUT, FMT = 9996 )'DLATPS', UPLO, TRANS,
 | 
						|
     $                  DIAG, 'N', N, IMAT, 8, RESULT( 8 )
 | 
						|
                     NFAIL = NFAIL + 1
 | 
						|
                  END IF
 | 
						|
                  IF( RESULT( 9 ).GE.THRESH ) THEN
 | 
						|
                     IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
 | 
						|
     $                  CALL ALAHD( NOUT, PATH )
 | 
						|
                     WRITE( NOUT, FMT = 9996 )'DLATPS', UPLO, TRANS,
 | 
						|
     $                  DIAG, 'Y', N, IMAT, 9, RESULT( 9 )
 | 
						|
                     NFAIL = NFAIL + 1
 | 
						|
                  END IF
 | 
						|
                  NRUN = NRUN + 2
 | 
						|
   80          CONTINUE
 | 
						|
   90       CONTINUE
 | 
						|
  100    CONTINUE
 | 
						|
  110 CONTINUE
 | 
						|
*
 | 
						|
*     Print a summary of the results.
 | 
						|
*
 | 
						|
      CALL ALASUM( PATH, NOUT, NFAIL, NRUN, NERRS )
 | 
						|
*
 | 
						|
 9999 FORMAT( ' UPLO=''', A1, ''', DIAG=''', A1, ''', N=', I5,
 | 
						|
     $      ', type ', I2, ', test(', I2, ')= ', G12.5 )
 | 
						|
 9998 FORMAT( ' UPLO=''', A1, ''', TRANS=''', A1, ''', DIAG=''', A1,
 | 
						|
     $      ''', N=', I5, ''', NRHS=', I5, ', type ', I2, ', test(',
 | 
						|
     $      I2, ')= ', G12.5 )
 | 
						|
 9997 FORMAT( 1X, A, '( ''', A1, ''', ''', A1, ''', ''', A1, ''',',
 | 
						|
     $      I5, ', ... ), type ', I2, ', test(', I2, ')=', G12.5 )
 | 
						|
 9996 FORMAT( 1X, A, '( ''', A1, ''', ''', A1, ''', ''', A1, ''', ''',
 | 
						|
     $      A1, ''',', I5, ', ... ), type ', I2, ', test(', I2, ')=',
 | 
						|
     $      G12.5 )
 | 
						|
      RETURN
 | 
						|
*
 | 
						|
*     End of DCHKTP
 | 
						|
*
 | 
						|
      END
 |