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|
*> \brief \b DLCTSX
*
* =========== DOCUMENTATION ===========
*
* Online html documentation available at
* http://www.netlib.org/lapack/explore-html/
*
* Definition:
* ===========
*
* LOGICAL FUNCTION DLCTSX( AR, AI, BETA )
*
* .. Scalar Arguments ..
* DOUBLE PRECISION AI, AR, BETA
* ..
*
*
*> \par Purpose:
* =============
*>
*> \verbatim
*>
*> This function is used to determine what eigenvalues will be
*> selected. If this is part of the test driver DDRGSX, do not
*> change the code UNLESS you are testing input examples and not
*> using the built-in examples.
*> \endverbatim
*
* Arguments:
* ==========
*
*> \param[in] AR
*> \verbatim
*> AR is DOUBLE PRECISION
*> The numerator of the real part of a complex eigenvalue
*> (AR/BETA) + i*(AI/BETA).
*> \endverbatim
*>
*> \param[in] AI
*> \verbatim
*> AI is DOUBLE PRECISION
*> The numerator of the imaginary part of a complex eigenvalue
*> (AR/BETA) + i*(AI).
*> \endverbatim
*>
*> \param[in] BETA
*> \verbatim
*> BETA is DOUBLE PRECISION
*> The denominator part of a complex eigenvalue
*> (AR/BETA) + i*(AI/BETA).
*> \endverbatim
*
* Authors:
* ========
*
*> \author Univ. of Tennessee
*> \author Univ. of California Berkeley
*> \author Univ. of Colorado Denver
*> \author NAG Ltd.
*
*> \date November 2011
*
*> \ingroup double_eig
*
* =====================================================================
LOGICAL FUNCTION DLCTSX( AR, AI, BETA )
*
* -- LAPACK test routine (version 3.4.0) --
* -- LAPACK is a software package provided by Univ. of Tennessee, --
* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
* November 2011
*
* .. Scalar Arguments ..
DOUBLE PRECISION AI, AR, BETA
* ..
*
* =====================================================================
*
* .. Scalars in Common ..
LOGICAL FS
INTEGER I, M, MPLUSN, N
* ..
* .. Common blocks ..
COMMON / MN / M, N, MPLUSN, I, FS
* ..
* .. Save statement ..
SAVE
* ..
* .. Executable Statements ..
*
IF( FS ) THEN
I = I + 1
IF( I.LE.M ) THEN
DLCTSX = .FALSE.
ELSE
DLCTSX = .TRUE.
END IF
IF( I.EQ.MPLUSN ) THEN
FS = .FALSE.
I = 0
END IF
ELSE
I = I + 1
IF( I.LE.N ) THEN
DLCTSX = .TRUE.
ELSE
DLCTSX = .FALSE.
END IF
IF( I.EQ.MPLUSN ) THEN
FS = .TRUE.
I = 0
END IF
END IF
*
* IF( AR/BETA.GT.0.0 )THEN
* DLCTSX = .TRUE.
* ELSE
* DLCTSX = .FALSE.
* END IF
*
RETURN
*
* End of DLCTSX
*
END
|
