693 lines
		
	
	
		
			24 KiB
		
	
	
	
		
			Fortran
		
	
	
	
			
		
		
	
	
			693 lines
		
	
	
		
			24 KiB
		
	
	
	
		
			Fortran
		
	
	
	
*> \brief \b CDRVPB
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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 CDRVPB( DOTYPE, NN, NVAL, NRHS, THRESH, TSTERR, NMAX,
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*                          A, AFAC, ASAV, B, BSAV, X, XACT, S, WORK,
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*                          RWORK, NOUT )
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*
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*       .. Scalar Arguments ..
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*       LOGICAL            TSTERR
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*       INTEGER            NMAX, NN, NOUT, NRHS
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*       REAL               THRESH
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*       ..
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*       .. Array Arguments ..
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*       LOGICAL            DOTYPE( * )
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*       INTEGER            NVAL( * )
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*       REAL               RWORK( * ), S( * )
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*       COMPLEX            A( * ), AFAC( * ), ASAV( * ), B( * ),
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*      $                   BSAV( * ), 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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*> CDRVPB tests the driver routines CPBSV and -SVX.
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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 dimension N.
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*> \endverbatim
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*>
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*> \param[in] NRHS
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*> \verbatim
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*>          NRHS is INTEGER
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*>          The number of right hand side vectors to be generated for
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*>          each linear system.
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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 REAL
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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 maximum value permitted for N, used in dimensioning the
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*>          work arrays.
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*> \endverbatim
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*>
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*> \param[out] A
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*> \verbatim
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*>          A is COMPLEX array, dimension (NMAX*NMAX)
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*> \endverbatim
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*>
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*> \param[out] AFAC
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*> \verbatim
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*>          AFAC is COMPLEX array, dimension (NMAX*NMAX)
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*> \endverbatim
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*>
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*> \param[out] ASAV
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*> \verbatim
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*>          ASAV is COMPLEX array, dimension (NMAX*NMAX)
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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 COMPLEX array, dimension (NMAX*NRHS)
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*> \endverbatim
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*>
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*> \param[out] BSAV
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*> \verbatim
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*>          BSAV is COMPLEX array, dimension (NMAX*NRHS)
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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 COMPLEX array, dimension (NMAX*NRHS)
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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 COMPLEX array, dimension (NMAX*NRHS)
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*> \endverbatim
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*>
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*> \param[out] S
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*> \verbatim
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*>          S is REAL array, dimension (NMAX)
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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 COMPLEX array, dimension
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*>                      (NMAX*max(3,NRHS))
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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 REAL array, dimension (NMAX+2*NRHS)
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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 complex_lin
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*
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*  =====================================================================
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      SUBROUTINE CDRVPB( DOTYPE, NN, NVAL, NRHS, THRESH, TSTERR, NMAX,
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     $                   A, AFAC, ASAV, B, BSAV, X, XACT, S, WORK,
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     $                   RWORK, 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, NOUT, NRHS
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      REAL               THRESH
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*     ..
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*     .. Array Arguments ..
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      LOGICAL            DOTYPE( * )
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      INTEGER            NVAL( * )
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      REAL               RWORK( * ), S( * )
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      COMPLEX            A( * ), AFAC( * ), ASAV( * ), B( * ),
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     $                   BSAV( * ), 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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      REAL               ONE, ZERO
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      PARAMETER          ( ONE = 1.0E+0, ZERO = 0.0E+0 )
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      INTEGER            NTYPES, NTESTS
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      PARAMETER          ( NTYPES = 8, NTESTS = 6 )
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      INTEGER            NBW
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      PARAMETER          ( NBW = 4 )
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*     ..
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*     .. Local Scalars ..
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      LOGICAL            EQUIL, NOFACT, PREFAC, ZEROT
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      CHARACTER          DIST, EQUED, FACT, PACKIT, TYPE, UPLO, XTYPE
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      CHARACTER*3        PATH
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      INTEGER            I, I1, I2, IEQUED, IFACT, IKD, IMAT, IN, INFO,
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     $                   IOFF, IUPLO, IW, IZERO, K, K1, KD, KL, KOFF,
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     $                   KU, LDA, LDAB, MODE, N, NB, NBMIN, NERRS,
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     $                   NFACT, NFAIL, NIMAT, NKD, NRUN, NT
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      REAL               AINVNM, AMAX, ANORM, CNDNUM, RCOND, RCONDC,
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     $                   ROLDC, SCOND
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*     ..
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*     .. Local Arrays ..
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      CHARACTER          EQUEDS( 2 ), FACTS( 3 )
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      INTEGER            ISEED( 4 ), ISEEDY( 4 ), KDVAL( NBW )
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      REAL               RESULT( NTESTS )
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*     ..
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*     .. External Functions ..
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      LOGICAL            LSAME
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      REAL               CLANGE, CLANHB, SGET06
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      EXTERNAL           LSAME, CLANGE, CLANHB, SGET06
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*     ..
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*     .. External Subroutines ..
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      EXTERNAL           ALADHD, ALAERH, ALASVM, CCOPY, CERRVX, CGET04,
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     $                   CLACPY, CLAIPD, CLAQHB, CLARHS, CLASET, CLATB4,
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     $                   CLATMS, CPBEQU, CPBSV, CPBSVX, CPBT01, CPBT02,
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     $                   CPBT05, CPBTRF, CPBTRS, CSWAP, XLAENV
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*     ..
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*     .. Intrinsic Functions ..
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      INTRINSIC          CMPLX, MAX, MIN
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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, NUNIT
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*     ..
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*     .. Common blocks ..
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      COMMON             / INFOC / INFOT, NUNIT, OK, LERR
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      COMMON             / SRNAMC / SRNAMT
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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               FACTS / 'F', 'N', 'E' / , EQUEDS / 'N', 'Y' /
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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 ) = 'Complex precision'
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      PATH( 2: 3 ) = 'PB'
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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 CERRVX( PATH, NOUT )
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      INFOT = 0
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      KDVAL( 1 ) = 0
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*
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*     Set the block size and minimum block size for testing.
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*
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      NB = 1
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      NBMIN = 2
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      CALL XLAENV( 1, NB )
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      CALL XLAENV( 2, NBMIN )
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*
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*     Do for each value of N in NVAL
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*
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      DO 110 IN = 1, NN
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         N = NVAL( IN )
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         LDA = MAX( N, 1 )
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         XTYPE = 'N'
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*
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*        Set limits on the number of loop iterations.
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*
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         NKD = MAX( 1, MIN( N, 4 ) )
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         NIMAT = NTYPES
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         IF( N.EQ.0 )
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     $      NIMAT = 1
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*
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         KDVAL( 2 ) = N + ( N+1 ) / 4
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         KDVAL( 3 ) = ( 3*N-1 ) / 4
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         KDVAL( 4 ) = ( N+1 ) / 4
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*
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         DO 100 IKD = 1, NKD
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*
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*           Do for KD = 0, (5*N+1)/4, (3N-1)/4, and (N+1)/4. This order
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*           makes it easier to skip redundant values for small values
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*           of N.
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*
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            KD = KDVAL( IKD )
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            LDAB = KD + 1
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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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            DO 90 IUPLO = 1, 2
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               KOFF = 1
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               IF( IUPLO.EQ.1 ) THEN
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                  UPLO = 'U'
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                  PACKIT = 'Q'
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                  KOFF = MAX( 1, KD+2-N )
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               ELSE
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                  UPLO = 'L'
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                  PACKIT = 'B'
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               END IF
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*
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               DO 80 IMAT = 1, NIMAT
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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 80
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*
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*                 Skip types 2, 3, or 4 if the matrix size is too small.
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*
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                  ZEROT = IMAT.GE.2 .AND. IMAT.LE.4
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                  IF( ZEROT .AND. N.LT.IMAT-1 )
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     $               GO TO 80
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*
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                  IF( .NOT.ZEROT .OR. .NOT.DOTYPE( 1 ) ) THEN
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*
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*                    Set up parameters with CLATB4 and generate a test
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*                    matrix with CLATMS.
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*
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                     CALL CLATB4( PATH, IMAT, N, N, TYPE, KL, KU, ANORM,
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     $                            MODE, CNDNUM, DIST )
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*
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                     SRNAMT = 'CLATMS'
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                     CALL CLATMS( N, N, DIST, ISEED, TYPE, RWORK, MODE,
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     $                            CNDNUM, ANORM, KD, KD, PACKIT,
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     $                            A( KOFF ), LDAB, WORK, INFO )
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*
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*                    Check error code from CLATMS.
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*
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                     IF( INFO.NE.0 ) THEN
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                        CALL ALAERH( PATH, 'CLATMS', INFO, 0, UPLO, N,
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     $                               N, -1, -1, -1, IMAT, NFAIL, NERRS,
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     $                               NOUT )
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                        GO TO 80
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                     END IF
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                  ELSE IF( IZERO.GT.0 ) THEN
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*
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*                    Use the same matrix for types 3 and 4 as for type
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*                    2 by copying back the zeroed out column,
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*
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                     IW = 2*LDA + 1
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                     IF( IUPLO.EQ.1 ) THEN
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                        IOFF = ( IZERO-1 )*LDAB + KD + 1
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                        CALL CCOPY( IZERO-I1, WORK( IW ), 1,
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     $                              A( IOFF-IZERO+I1 ), 1 )
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                        IW = IW + IZERO - I1
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                        CALL CCOPY( I2-IZERO+1, WORK( IW ), 1,
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     $                              A( IOFF ), MAX( LDAB-1, 1 ) )
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                     ELSE
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                        IOFF = ( I1-1 )*LDAB + 1
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                        CALL CCOPY( IZERO-I1, WORK( IW ), 1,
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     $                              A( IOFF+IZERO-I1 ),
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     $                              MAX( LDAB-1, 1 ) )
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                        IOFF = ( IZERO-1 )*LDAB + 1
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                        IW = IW + IZERO - I1
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                        CALL CCOPY( I2-IZERO+1, WORK( IW ), 1,
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     $                              A( IOFF ), 1 )
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                     END IF
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                  END IF
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*
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*                 For types 2-4, zero one row and column of the matrix
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*                 to test that INFO is returned correctly.
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*
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                  IZERO = 0
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                  IF( ZEROT ) THEN
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                     IF( IMAT.EQ.2 ) THEN
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                        IZERO = 1
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                     ELSE IF( IMAT.EQ.3 ) THEN
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                        IZERO = N
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                     ELSE
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                        IZERO = N / 2 + 1
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                     END IF
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*
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*                    Save the zeroed out row and column in WORK(*,3)
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*
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                     IW = 2*LDA
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                     DO 20 I = 1, MIN( 2*KD+1, N )
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                        WORK( IW+I ) = ZERO
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   20                CONTINUE
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                     IW = IW + 1
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                     I1 = MAX( IZERO-KD, 1 )
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                     I2 = MIN( IZERO+KD, N )
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*
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                     IF( IUPLO.EQ.1 ) THEN
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                        IOFF = ( IZERO-1 )*LDAB + KD + 1
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                        CALL CSWAP( IZERO-I1, A( IOFF-IZERO+I1 ), 1,
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     $                              WORK( IW ), 1 )
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                        IW = IW + IZERO - I1
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                        CALL CSWAP( I2-IZERO+1, A( IOFF ),
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     $                              MAX( LDAB-1, 1 ), WORK( IW ), 1 )
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                     ELSE
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                        IOFF = ( I1-1 )*LDAB + 1
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                        CALL CSWAP( IZERO-I1, A( IOFF+IZERO-I1 ),
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     $                              MAX( LDAB-1, 1 ), WORK( IW ), 1 )
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                        IOFF = ( IZERO-1 )*LDAB + 1
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                        IW = IW + IZERO - I1
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                        CALL CSWAP( I2-IZERO+1, A( IOFF ), 1,
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     $                              WORK( IW ), 1 )
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                     END IF
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                  END IF
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*
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*                 Set the imaginary part of the diagonals.
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*
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                  IF( IUPLO.EQ.1 ) THEN
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                     CALL CLAIPD( N, A( KD+1 ), LDAB, 0 )
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                  ELSE
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                     CALL CLAIPD( N, A( 1 ), LDAB, 0 )
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                  END IF
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*
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*                 Save a copy of the matrix A in ASAV.
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*
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                  CALL CLACPY( 'Full', KD+1, N, A, LDAB, ASAV, LDAB )
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*
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                  DO 70 IEQUED = 1, 2
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                     EQUED = EQUEDS( IEQUED )
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                     IF( IEQUED.EQ.1 ) THEN
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                        NFACT = 3
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                     ELSE
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                        NFACT = 1
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                     END IF
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*
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                     DO 60 IFACT = 1, NFACT
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                        FACT = FACTS( IFACT )
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                        PREFAC = LSAME( FACT, 'F' )
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                        NOFACT = LSAME( FACT, 'N' )
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                        EQUIL = LSAME( FACT, 'E' )
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*
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                        IF( ZEROT ) THEN
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                           IF( PREFAC )
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     $                        GO TO 60
 | 
						|
                           RCONDC = ZERO
 | 
						|
*
 | 
						|
                        ELSE IF( .NOT.LSAME( FACT, 'N' ) ) THEN
 | 
						|
*
 | 
						|
*                          Compute the condition number for comparison
 | 
						|
*                          with the value returned by CPBSVX (FACT =
 | 
						|
*                          'N' reuses the condition number from the
 | 
						|
*                          previous iteration with FACT = 'F').
 | 
						|
*
 | 
						|
                           CALL CLACPY( 'Full', KD+1, N, ASAV, LDAB,
 | 
						|
     $                                  AFAC, LDAB )
 | 
						|
                           IF( EQUIL .OR. IEQUED.GT.1 ) THEN
 | 
						|
*
 | 
						|
*                             Compute row and column scale factors to
 | 
						|
*                             equilibrate the matrix A.
 | 
						|
*
 | 
						|
                              CALL CPBEQU( UPLO, N, KD, AFAC, LDAB, S,
 | 
						|
     $                                     SCOND, AMAX, INFO )
 | 
						|
                              IF( INFO.EQ.0 .AND. N.GT.0 ) THEN
 | 
						|
                                 IF( IEQUED.GT.1 )
 | 
						|
     $                              SCOND = ZERO
 | 
						|
*
 | 
						|
*                                Equilibrate the matrix.
 | 
						|
*
 | 
						|
                                 CALL CLAQHB( UPLO, N, KD, AFAC, LDAB,
 | 
						|
     $                                        S, SCOND, AMAX, EQUED )
 | 
						|
                              END IF
 | 
						|
                           END IF
 | 
						|
*
 | 
						|
*                          Save the condition number of the
 | 
						|
*                          non-equilibrated system for use in CGET04.
 | 
						|
*
 | 
						|
                           IF( EQUIL )
 | 
						|
     $                        ROLDC = RCONDC
 | 
						|
*
 | 
						|
*                          Compute the 1-norm of A.
 | 
						|
*
 | 
						|
                           ANORM = CLANHB( '1', UPLO, N, KD, AFAC, LDAB,
 | 
						|
     $                             RWORK )
 | 
						|
*
 | 
						|
*                          Factor the matrix A.
 | 
						|
*
 | 
						|
                           CALL CPBTRF( UPLO, N, KD, AFAC, LDAB, INFO )
 | 
						|
*
 | 
						|
*                          Form the inverse of A.
 | 
						|
*
 | 
						|
                           CALL CLASET( 'Full', N, N, CMPLX( ZERO ),
 | 
						|
     $                                  CMPLX( ONE ), A, LDA )
 | 
						|
                           SRNAMT = 'CPBTRS'
 | 
						|
                           CALL CPBTRS( UPLO, N, KD, N, AFAC, LDAB, A,
 | 
						|
     $                                  LDA, INFO )
 | 
						|
*
 | 
						|
*                          Compute the 1-norm condition number of A.
 | 
						|
*
 | 
						|
                           AINVNM = CLANGE( '1', N, N, A, LDA, RWORK )
 | 
						|
                           IF( ANORM.LE.ZERO .OR. AINVNM.LE.ZERO ) THEN
 | 
						|
                              RCONDC = ONE
 | 
						|
                           ELSE
 | 
						|
                              RCONDC = ( ONE / ANORM ) / AINVNM
 | 
						|
                           END IF
 | 
						|
                        END IF
 | 
						|
*
 | 
						|
*                       Restore the matrix A.
 | 
						|
*
 | 
						|
                        CALL CLACPY( 'Full', KD+1, N, ASAV, LDAB, A,
 | 
						|
     $                               LDAB )
 | 
						|
*
 | 
						|
*                       Form an exact solution and set the right hand
 | 
						|
*                       side.
 | 
						|
*
 | 
						|
                        SRNAMT = 'CLARHS'
 | 
						|
                        CALL CLARHS( PATH, XTYPE, UPLO, ' ', N, N, KD,
 | 
						|
     $                               KD, NRHS, A, LDAB, XACT, LDA, B,
 | 
						|
     $                               LDA, ISEED, INFO )
 | 
						|
                        XTYPE = 'C'
 | 
						|
                        CALL CLACPY( 'Full', N, NRHS, B, LDA, BSAV,
 | 
						|
     $                               LDA )
 | 
						|
*
 | 
						|
                        IF( NOFACT ) THEN
 | 
						|
*
 | 
						|
*                          --- Test CPBSV  ---
 | 
						|
*
 | 
						|
*                          Compute the L*L' or U'*U factorization of the
 | 
						|
*                          matrix and solve the system.
 | 
						|
*
 | 
						|
                           CALL CLACPY( 'Full', KD+1, N, A, LDAB, AFAC,
 | 
						|
     $                                  LDAB )
 | 
						|
                           CALL CLACPY( 'Full', N, NRHS, B, LDA, X,
 | 
						|
     $                                  LDA )
 | 
						|
*
 | 
						|
                           SRNAMT = 'CPBSV '
 | 
						|
                           CALL CPBSV( UPLO, N, KD, NRHS, AFAC, LDAB, X,
 | 
						|
     $                                 LDA, INFO )
 | 
						|
*
 | 
						|
*                          Check error code from CPBSV .
 | 
						|
*
 | 
						|
                           IF( INFO.NE.IZERO ) THEN
 | 
						|
                              CALL ALAERH( PATH, 'CPBSV ', INFO, IZERO,
 | 
						|
     $                                     UPLO, N, N, KD, KD, NRHS,
 | 
						|
     $                                     IMAT, NFAIL, NERRS, NOUT )
 | 
						|
                              GO TO 40
 | 
						|
                           ELSE IF( INFO.NE.0 ) THEN
 | 
						|
                              GO TO 40
 | 
						|
                           END IF
 | 
						|
*
 | 
						|
*                          Reconstruct matrix from factors and compute
 | 
						|
*                          residual.
 | 
						|
*
 | 
						|
                           CALL CPBT01( UPLO, N, KD, A, LDAB, AFAC,
 | 
						|
     $                                  LDAB, RWORK, RESULT( 1 ) )
 | 
						|
*
 | 
						|
*                          Compute residual of the computed solution.
 | 
						|
*
 | 
						|
                           CALL CLACPY( 'Full', N, NRHS, B, LDA, WORK,
 | 
						|
     $                                  LDA )
 | 
						|
                           CALL CPBT02( UPLO, N, KD, NRHS, A, LDAB, X,
 | 
						|
     $                                  LDA, WORK, LDA, RWORK,
 | 
						|
     $                                  RESULT( 2 ) )
 | 
						|
*
 | 
						|
*                          Check solution from generated exact solution.
 | 
						|
*
 | 
						|
                           CALL CGET04( N, NRHS, X, LDA, XACT, LDA,
 | 
						|
     $                                  RCONDC, RESULT( 3 ) )
 | 
						|
                           NT = 3
 | 
						|
*
 | 
						|
*                          Print information about the tests that did
 | 
						|
*                          not pass the threshold.
 | 
						|
*
 | 
						|
                           DO 30 K = 1, NT
 | 
						|
                              IF( RESULT( K ).GE.THRESH ) THEN
 | 
						|
                                 IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
 | 
						|
     $                              CALL ALADHD( NOUT, PATH )
 | 
						|
                                 WRITE( NOUT, FMT = 9999 )'CPBSV ',
 | 
						|
     $                              UPLO, N, KD, IMAT, K, RESULT( K )
 | 
						|
                                 NFAIL = NFAIL + 1
 | 
						|
                              END IF
 | 
						|
   30                      CONTINUE
 | 
						|
                           NRUN = NRUN + NT
 | 
						|
   40                      CONTINUE
 | 
						|
                        END IF
 | 
						|
*
 | 
						|
*                       --- Test CPBSVX ---
 | 
						|
*
 | 
						|
                        IF( .NOT.PREFAC )
 | 
						|
     $                     CALL CLASET( 'Full', KD+1, N, CMPLX( ZERO ),
 | 
						|
     $                                  CMPLX( ZERO ), AFAC, LDAB )
 | 
						|
                        CALL CLASET( 'Full', N, NRHS, CMPLX( ZERO ),
 | 
						|
     $                               CMPLX( ZERO ), X, LDA )
 | 
						|
                        IF( IEQUED.GT.1 .AND. N.GT.0 ) THEN
 | 
						|
*
 | 
						|
*                          Equilibrate the matrix if FACT='F' and
 | 
						|
*                          EQUED='Y'
 | 
						|
*
 | 
						|
                           CALL CLAQHB( UPLO, N, KD, A, LDAB, S, SCOND,
 | 
						|
     $                                  AMAX, EQUED )
 | 
						|
                        END IF
 | 
						|
*
 | 
						|
*                       Solve the system and compute the condition
 | 
						|
*                       number and error bounds using CPBSVX.
 | 
						|
*
 | 
						|
                        SRNAMT = 'CPBSVX'
 | 
						|
                        CALL CPBSVX( FACT, UPLO, N, KD, NRHS, A, LDAB,
 | 
						|
     $                               AFAC, LDAB, EQUED, S, B, LDA, X,
 | 
						|
     $                               LDA, RCOND, RWORK, RWORK( NRHS+1 ),
 | 
						|
     $                               WORK, RWORK( 2*NRHS+1 ), INFO )
 | 
						|
*
 | 
						|
*                       Check the error code from CPBSVX.
 | 
						|
*
 | 
						|
                        IF( INFO.NE.IZERO ) THEN
 | 
						|
                           CALL ALAERH( PATH, 'CPBSVX', INFO, IZERO,
 | 
						|
     $                                  FACT // UPLO, N, N, KD, KD,
 | 
						|
     $                                  NRHS, IMAT, NFAIL, NERRS, NOUT )
 | 
						|
                           GO TO 60
 | 
						|
                        END IF
 | 
						|
*
 | 
						|
                        IF( INFO.EQ.0 ) THEN
 | 
						|
                           IF( .NOT.PREFAC ) THEN
 | 
						|
*
 | 
						|
*                             Reconstruct matrix from factors and
 | 
						|
*                             compute residual.
 | 
						|
*
 | 
						|
                              CALL CPBT01( UPLO, N, KD, A, LDAB, AFAC,
 | 
						|
     $                                     LDAB, RWORK( 2*NRHS+1 ),
 | 
						|
     $                                     RESULT( 1 ) )
 | 
						|
                              K1 = 1
 | 
						|
                           ELSE
 | 
						|
                              K1 = 2
 | 
						|
                           END IF
 | 
						|
*
 | 
						|
*                          Compute residual of the computed solution.
 | 
						|
*
 | 
						|
                           CALL CLACPY( 'Full', N, NRHS, BSAV, LDA,
 | 
						|
     $                                  WORK, LDA )
 | 
						|
                           CALL CPBT02( UPLO, N, KD, NRHS, ASAV, LDAB,
 | 
						|
     $                                  X, LDA, WORK, LDA,
 | 
						|
     $                                  RWORK( 2*NRHS+1 ), RESULT( 2 ) )
 | 
						|
*
 | 
						|
*                          Check solution from generated exact solution.
 | 
						|
*
 | 
						|
                           IF( NOFACT .OR. ( PREFAC .AND. LSAME( EQUED,
 | 
						|
     $                         'N' ) ) ) THEN
 | 
						|
                              CALL CGET04( N, NRHS, X, LDA, XACT, LDA,
 | 
						|
     $                                     RCONDC, RESULT( 3 ) )
 | 
						|
                           ELSE
 | 
						|
                              CALL CGET04( N, NRHS, X, LDA, XACT, LDA,
 | 
						|
     $                                     ROLDC, RESULT( 3 ) )
 | 
						|
                           END IF
 | 
						|
*
 | 
						|
*                          Check the error bounds from iterative
 | 
						|
*                          refinement.
 | 
						|
*
 | 
						|
                           CALL CPBT05( UPLO, N, KD, NRHS, ASAV, LDAB,
 | 
						|
     $                                  B, LDA, X, LDA, XACT, LDA,
 | 
						|
     $                                  RWORK, RWORK( NRHS+1 ),
 | 
						|
     $                                  RESULT( 4 ) )
 | 
						|
                        ELSE
 | 
						|
                           K1 = 6
 | 
						|
                        END IF
 | 
						|
*
 | 
						|
*                       Compare RCOND from CPBSVX with the computed
 | 
						|
*                       value in RCONDC.
 | 
						|
*
 | 
						|
                        RESULT( 6 ) = SGET06( RCOND, RCONDC )
 | 
						|
*
 | 
						|
*                       Print information about the tests that did not
 | 
						|
*                       pass the threshold.
 | 
						|
*
 | 
						|
                        DO 50 K = K1, 6
 | 
						|
                           IF( RESULT( K ).GE.THRESH ) THEN
 | 
						|
                              IF( NFAIL.EQ.0 .AND. NERRS.EQ.0 )
 | 
						|
     $                           CALL ALADHD( NOUT, PATH )
 | 
						|
                              IF( PREFAC ) THEN
 | 
						|
                                 WRITE( NOUT, FMT = 9997 )'CPBSVX',
 | 
						|
     $                              FACT, UPLO, N, KD, EQUED, IMAT, K,
 | 
						|
     $                              RESULT( K )
 | 
						|
                              ELSE
 | 
						|
                                 WRITE( NOUT, FMT = 9998 )'CPBSVX',
 | 
						|
     $                              FACT, UPLO, N, KD, IMAT, K,
 | 
						|
     $                              RESULT( K )
 | 
						|
                              END IF
 | 
						|
                              NFAIL = NFAIL + 1
 | 
						|
                           END IF
 | 
						|
   50                   CONTINUE
 | 
						|
                        NRUN = NRUN + 7 - K1
 | 
						|
   60                CONTINUE
 | 
						|
   70             CONTINUE
 | 
						|
   80          CONTINUE
 | 
						|
   90       CONTINUE
 | 
						|
  100    CONTINUE
 | 
						|
  110 CONTINUE
 | 
						|
*
 | 
						|
*     Print a summary of the results.
 | 
						|
*
 | 
						|
      CALL ALASVM( PATH, NOUT, NFAIL, NRUN, NERRS )
 | 
						|
*
 | 
						|
 9999 FORMAT( 1X, A, ', UPLO=''', A1, ''', N =', I5, ', KD =', I5,
 | 
						|
     $      ', type ', I1, ', test(', I1, ')=', G12.5 )
 | 
						|
 9998 FORMAT( 1X, A, '( ''', A1, ''', ''', A1, ''', ', I5, ', ', I5,
 | 
						|
     $      ', ... ), type ', I1, ', test(', I1, ')=', G12.5 )
 | 
						|
 9997 FORMAT( 1X, A, '( ''', A1, ''', ''', A1, ''', ', I5, ', ', I5,
 | 
						|
     $      ', ... ), EQUED=''', A1, ''', type ', I1, ', test(', I1,
 | 
						|
     $      ')=', G12.5 )
 | 
						|
      RETURN
 | 
						|
*
 | 
						|
*     End of CDRVPB
 | 
						|
*
 | 
						|
      END
 |