File flow.txt will run synthesis, logic simulation, place and route,
LVS, DRC and creation of CIF and GDS files.

The vasy, boom, boog and loon synthesis steps are all looped to
try to find the fastest netlist.

vasy produces two netlists, coming from two different sets of
     parameters.
boom produces in excess of 200 netlists.
boog produces around 50 netlists which have different critical
     path delays. Boog only considers the minimum drive strength
     cells.
loon speeds up each of the netlists by optimising in turn with
     0fF and 6fF wireload libraries until no more improvement is
     possible. This step is quite slow, so a time limit has been
     set. The input netlists from boog have been sorted so that
     the fastest ones are optimised first.

The P&R uses customised versions of OCP and NERO. Scripts extend
the width by two tracks left and right for good well and substrate
termination. Two runs give layout with horizontal and vertical
metal-2.

After routing the netlist, a script adds pieces of metal around the
vias to give a 2 lambda end overlap of metal. There are no DRC
violations with this technology because of the 10 lambda track pitch.

Critical path delay is 577 ps
Area is                496 um^2
Gate count              43
Occupancy               79%
