!>
!> DSYL01 tests DTRSYL and DTRSYL3, routines for solving the Sylvester matrix
!> equation
!>
!>    op(A)*X + ISGN*X*op(B) = scale*C,
!>
!> A and B are assumed to be in Schur canonical form, op() represents an
!> optional transpose, and ISGN can be -1 or +1.  Scale is an output
!> less than or equal to 1, chosen to avoid overflow in X.
!>
!> The test code verifies that the following residual does not exceed
!> the provided threshold:
!>
!>    norm(op(A)*X + ISGN*X*op(B) - scale*C) /
!>        (EPS*max(norm(A),norm(B))*norm(X))
!>
!> This routine complements DGET35 by testing with larger,
!> random matrices, of which some require rescaling of X to avoid overflow.
!>
!> 

!>          THRESH is DOUBLE PRECISION
!>          A test will count as  if the residual, computed as
!>          described above, exceeds THRESH.
!> 

NFAIL

!>          NFAIL is INTEGER array, dimension (3)
!>          NFAIL(1) = No. of times residual DTRSYL exceeds threshold THRESH
!>          NFAIL(2) = No. of times residual DTRSYL3 exceeds threshold THRESH
!>          NFAIL(3) = No. of times DTRSYL3 and DTRSYL deviate
!> 

RMAX

!>          RMAX is DOUBLE PRECISION, dimension (2)
!>          RMAX(1) = Value of the largest test ratio of DTRSYL
!>          RMAX(2) = Value of the largest test ratio of DTRSYL3
!> 

NINFO

!>          NINFO is INTEGER array, dimension (2)
!>          NINFO(1) = No. of times DTRSYL returns an expected INFO
!>          NINFO(2) = No. of times DTRSYL3 returns an expected INFO
!> 

KNT

!>          KNT is INTEGER
!>          Total number of examples tested.
!>