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LOGICAL FUNCTION CGENND (M, N, A, LDA)
IMPLICIT NONE
*
* -- LAPACK test routine (version 3.1) --
* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
* February 2008
*
* .. Scalar Arguments ..
INTEGER M, N, LDA
* ..
* .. Array Arguments ..
COMPLEX A( LDA, * )
* ..
*
* Purpose
* =======
*
* CGENND tests that its argument has a real, non-negative diagonal.
*
* Arguments
* =========
*
* M (input) INTEGER
* The number of rows in A.
*
* N (input) INTEGER
* The number of columns in A.
*
* A (input) COMPLEX array, dimension (LDA, N)
* The matrix.
*
* LDA (input) INTEGER
* Leading dimension of A.
*
* =====================================================================
*
* .. Parameters ..
REAL ZERO
PARAMETER ( ZERO = 0.0E0 )
* ..
* .. Local Scalars ..
LOGICAL OUT
INTEGER I, K
COMPLEX AII
* ..
* .. Intrinsics ..
INTRINSIC MIN, REAL, AIMAG
* ..
* .. Executable Statements ..
K = MIN( M, N )
DO I = 1, K
AII = A( I, I )
IF( REAL( AII ).LT.ZERO.OR.AIMAG( AII ).NE.ZERO ) THEN
CGENND = .FALSE.
RETURN
END IF
END DO
CGENND = .TRUE.
RETURN
END
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