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.\"  * $Source: /vol/opua/opua2/sis/sis-1.1/common/src/sis/sis_lib/help/RCS/xl_rl.1,v $
.\"  * $Author: sis $
.\"  * $Revision: 1.2 $
.\"  * $Date: 1992/05/06 19:04:01 $
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.XX
xl_rl [-n support] [-m] [-M MAX_FANINS] 
    [-t (trav_method-levels)] [-c collapse_input_limit]
    [-v verbosity_level]
.PP
Used for timing optimization for table look up architectures (phase 1).
Given a feasible network (obtained say by using speed_up), reduces number of
levels for table look up with "support" inputs.  If \fB-m\fP is not given,
it tries to move fanins for each node also, provided the number of
fanins of the node does not exceed MAX_FANINS (default 15). As a
final step, tries collapsing the network if number of inputs to the
network is at most collapse_input_limit (default = 10). Then applies
Roth-Karp decomposition and cofactoring (support > 2). If number of 
levels decreases, accepts the better decomposition. 
.PP
\fB-n\fP: support is the size of the TLU block (default = 5)
