
62 CHAPTER 2. COMBINATIONAL DESIGN EXAMPLES
If you check the output file obtained with BOOM you will notice that it does not improve the already given
description. Next, we use BOOG also optimizing delay (the output has been shortened to make it fit).
% boog ppg4 myppg4 -x 0 -m 4
@@@@@@@ @@@@ @
@@ @@ @@ @@
@@ @@ @@ @
@@ @@ @@@ @@@ @@
@@ @@ @@ @@ @@ @@ @@
@@@@@@ @@ @@ @@ @@ @@ @@@@@
@@ @@ @@ @@ @@ @@ @@ @ @@
@@ @@ @@ @@ @@ @@ @@ @ @@
@@ @@ @@ @@ @@ @@ @@ @@
@@ @@ @@ @@ @@ @@ @@ @@
@@@@@@@@ @@@ @@@ @@@@
Binding and Optimizing On Gates
Alliance CAD System 5.0 20040928, boog 5.0 [2003/01/09]
Copyright (c) 2000-2005, ASIM/LIP6/UPMC
Author(s): Fran?ois Donnet
Reading default parameter...
100% delay optimization
Reading file ’ppg4.vbe’...
Controlling file ’ppg4.vbe’...
Reading lib ’/usr/local/alliance/cells/s xlib ’...
Controlling lib ’/usr/local/alliance/cel ls/s xlib ’...
Preparing file ’ppg4.vbe’...
Capacitances on file ’ppg4.vbe’...
Unflattening file ’ppg4.vbe’...
Mapping file ’ppg4.vbe’...
Saving file ’myppg4.vst’...
Quick estimated critical path (no warranty)...324 ps from ’a3’ to ’p33’
Quick estimated area (with over-cell routing)...20000 lambda?
Details...
a2_x2: 16
Total: 16
Saving critical path in xsch color f ile ’myppg4.xsc’...
End of boog...
We then apply LOON to the .vst file we have obtained (the output has also been s hortened to make it fit).
% loon -x 0 -m 4 myppg4 ppg4
@@@@@@ @@@ @@@
@@ @@ @
@@ @@@ @
@@ @@@ @@@ @ @@ @
@@ @@ @@ @@ @@ @ @@ @
@@ @@ @@ @@ @@ @ @@ @
@@ @@ @@ @@ @@ @ @ @ @
@@ @@ @@ @@ @@ @ @ @ @
@@ @ @@ @@ @@ @@ @ @@@
@@ @ @@ @@ @@ @@ @ @@
@@@@@@@@@@ @@@ @@@ @@@ @@
Local optimization on Nets
Alliance CAD System 5.0 20040928, loon 5.0 [2003/12/07]
Copyright (c) 2000-2005, ASIM/LIP6/UPMC
Author(s): Fran?ois Donnet
Reading default parameter...
100% delay optimization
Reading file ’myppg4.vst’...
Reading lib ’/usr/local/alliance/cells/s xlib ’...
Capacitances on file ’myppg4.vst’...
Delays on file ’myppg4.vst’...324 ps
Area on file ’myppg4.vst’...20000 lamda? (with over-cell routing)
Details...
a2_x2: 16 (100%)
Total: 16
Critical path (no warranty)...324 ps from ’a3’ to ’p33’
Saving file ’ppg4.vst’...
Saving critical path in xsch color f ile ’ppg4.xsc’...
End of loon...
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