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LOGICAL FUNCTION CLCTSX( ALPHA, BETA )
*
* -- LAPACK test routine (version 3.0) --
* Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd.,
* Courant Institute, Argonne National Lab, and Rice University
* June 30, 1999
*
* .. Scalar Arguments ..
COMPLEX ALPHA, BETA
* ..
*
* Purpose
* =======
*
* 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.
*
* Arguments
* =========
*
* ALPHA (input) COMPLEX
* BETA (input) COMPLEX
* parameters to decide whether the pair (ALPHA, BETA) is
* selected.
*
* =====================================================================
*
* .. 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
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