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|
*> \brief \b CLCTSX
*
* =========== DOCUMENTATION ===========
*
* Online html documentation available at
* http://www.netlib.org/lapack/explore-html/
*
* Definition
* ==========
*
* LOGICAL FUNCTION CLCTSX( ALPHA, BETA )
*
* .. Scalar Arguments ..
* COMPLEX ALPHA, BETA
* ..
*
* Purpose
* =======
*
*>\details \b Purpose:
*>\verbatim
*>
*> This function is used to determine what eigenvalues will be
*> selected. If this is part of the test driver CDRGSX, do not
*> change the code UNLESS you are testing input examples and not
*> using the built-in examples.
*>
*>\endverbatim
*
* Arguments
* =========
*
*> \param[in] ALPHA
*> \verbatim
*> ALPHA is COMPLEX
*> \endverbatim
*>
*> \param[in] BETA
*> \verbatim
*> BETA is COMPLEX
*> \endverbatim
*> \verbatim
*> parameters to decide whether the pair (ALPHA, BETA) is
*> selected.
*> \endverbatim
*>
*
* Authors
* =======
*
*> \author Univ. of Tennessee
*> \author Univ. of California Berkeley
*> \author Univ. of Colorado Denver
*> \author NAG Ltd.
*
*> \date November 2011
*
*> \ingroup complex_eig
*
* =====================================================================
LOGICAL FUNCTION CLCTSX( ALPHA, BETA )
*
* -- LAPACK test routine (version 3.1) --
* -- 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 ..
COMPLEX ALPHA, BETA
* ..
*
* =====================================================================
*
* .. Parameters ..
* REAL ZERO
* PARAMETER ( ZERO = 0.0E+0 )
* COMPLEX CZERO
* PARAMETER ( CZERO = ( 0.0E+0, 0.0E+0 ) )
* ..
* .. 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
CLCTSX = .FALSE.
ELSE
CLCTSX = .TRUE.
END IF
IF( I.EQ.MPLUSN ) THEN
FS = .FALSE.
I = 0
END IF
ELSE
I = I + 1
IF( I.LE.N ) THEN
CLCTSX = .TRUE.
ELSE
CLCTSX = .FALSE.
END IF
IF( I.EQ.MPLUSN ) THEN
FS = .TRUE.
I = 0
END IF
END IF
*
* IF( BETA.EQ.CZERO ) THEN
* CLCTSX = ( REAL( ALPHA ).GT.ZERO )
* ELSE
* CLCTSX = ( REAL( ALPHA/BETA ).GT.ZERO )
* END IF
*
RETURN
*
* End of CLCTSX
*
END
|
