DGET40 tests DTGEXC, a routine for swapping adjacent blocks (either
 1 by 1 or 2 by 2) on the diagonal of a pencil in real generalized Schur form.
 Thus, DTGEXC computes an orthogonal matrices Q and Z such that
     Q' * ( [ A B ], [ D E ] ) * Z  = ( [ C1 B1 ], [ F1 E1 ] )
          ( [ 0 C ]  [   F ] )        ( [ 0  A1 ]  [    D1]  )
 where (C1,F1) is similar to (C,F) and (A1,D1) is similar to (A,D).
 Both (A,D) and (C,F) are assumed to be in standard form
 and (A1,D1) and (C1,F1) are returned with the
 same properties.

RMAX

          RMAX is DOUBLE PRECISION
          Value of the largest test ratio.

LMAX

          LMAX is INTEGER
          Example number where largest test ratio achieved.

NINFO

          NINFO is INTEGER array, dimension (2)
          NINFO( 1 ) = DTGEXC without accumulation returned INFO nonzero
          NINFO( 2 ) = DTGEXC with accumulation returned INFO nonzero

KNT

          KNT is INTEGER
          Total number of examples tested.

NIN

          NIN is INTEGER
          Input logical unit number.

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

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