83 lines
1.9 KiB
FortranFixed
83 lines
1.9 KiB
FortranFixed
LOGICAL FUNCTION DLCTSX( AR, AI, BETA )
|
|
*
|
|
* -- LAPACK test routine (version 3.1) --
|
|
* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
|
|
* November 2006
|
|
*
|
|
* .. Scalar Arguments ..
|
|
DOUBLE PRECISION AI, AR, BETA
|
|
* ..
|
|
*
|
|
* Purpose
|
|
* =======
|
|
*
|
|
* 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.
|
|
*
|
|
* Arguments
|
|
* =========
|
|
*
|
|
* AR (input) DOUBLE PRECISION
|
|
* The numerator of the real part of a complex eigenvalue
|
|
* (AR/BETA) + i*(AI/BETA).
|
|
*
|
|
* AI (input) DOUBLE PRECISION
|
|
* The numerator of the imaginary part of a complex eigenvalue
|
|
* (AR/BETA) + i*(AI).
|
|
*
|
|
* BETA (input) DOUBLE PRECISION
|
|
* The denominator part of a complex eigenvalue
|
|
* (AR/BETA) + i*(AI/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
|