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Default machine-specific parameters for (skew-)Hamiltonian computation routines

**[Specification]**
**[Arguments]**
**[Method]**
**[References]**
**[Comments]**
**[Example]**
**Purpose**

To provide an extension of the LAPACK routine ILAENV to
machine-specific parameters for SLICOT routines.
The default values in this version aim to give good performance on
a wide range of computers. For optimal performance, however, the
user is advised to modify this routine. Note that an optimized
BLAS is a crucial prerequisite for any speed gains. For further
details, see ILAENV.

**Function Value**
UE01MD INTEGER
The function value set according to ISPEC.

**Arguments**
**Input/Output Parameters**

ISPEC (input) INTEGER
Specifies the parameter to be returned as the value of
UE01MD, as follows:
= 1: the optimal blocksize; if the returned value is 1, an
unblocked algorithm will give the best performance;
= 2: the minimum block size for which the block routine
should be used; if the usable block size is less than
this value, an unblocked routine should be used;
= 3: the crossover point (in a block routine, for N less
than this value, an unblocked routine should be used)
= 4: the number of shifts, used in the product eigenvalue
routine;
= 8: the crossover point for the multishift QR method for
product eigenvalue problems.
NAME (input) CHARACTER*(*)
The name of the calling subroutine, in either upper case
or lower case.
OPTS (input) CHARACTER*(*)
The character options to the subroutine NAME, concatenated
into a single character string.
N1 (input) INTEGER
N2 (input) INTEGER
N3 (input) INTEGER
Problem dimensions for the subroutine NAME; these may not
all be required.

**Further Comments**
None

**Example**
**Program Text**

None

**Program Data**
None

**Program Results**
None

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