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2.1. THE DESIGN OF A 4-BIT MULTIPLIER USING ADDER TREES 69
Then we use BOOG to map the description on the cell library provided by Alliance.
% boog multiplier4 smultiplier4 -x 0 -m 4
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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
MBK_VDD : vdd
MBK_VSS : vss
MBK_IN_LO : vst
MBK_OUT_LO : vst
MBK_WORK_LIB : .
MBK_TARGET_LIB : /usr/local/alliance/cell s/s xlib
Reading default parameter...
100% delay optimization
Reading file ’multiplier4.vbe’...
Controlling file ’multiplier4.vbe’...
Reading lib ’/usr/local/alliance/cells/s xlib ’...
Mapping Warning: Cell ’halfadder_x4’ isn’t supported
Mapping Warning: Cell ’halfadder_x2’ isn’t supported
Mapping Warning: Cell ’fulladder_x4’ isn’t supported
Mapping Warning: Cell ’fulladder_x2’ isn’t supported
Controlling lib ’/usr/local/alliance/cel ls/s xlib ’...
Preparing file ’multiplier4.vbe’...
Capacitances on file ’multiplier4.vbe’...
Unflattening file ’multiplier4.vbe’...
Mapping file ’multiplier4.vbe’...
Saving file ’smultiplier4.vst’...
Quick estimated critical path (no warranty)...2990 ps from ’b2’ to ’p4’
Quick estimated area (with over-cell routing)...291000 lambda?
Details...
na2_x1: 39
no2_x1: 32
a2_x2: 31
inv_x2: 12
oa22_x2: 11
na3_x1: 11
o2_x2: 11
noa22_x1: 10
nao22_x1: 7
on12_x1: 6
xr2_x1: 6
a3_x2: 5
ao22_x2: 5
nxr2_x1: 5
no3_x1: 4
mx3_x2: 4
oa2ao222_x2: 4
nao2o22_x1: 4
o3_x2: 3
na4_x1: 2
noa2ao222_x1: 2
zero_x0: 1
ao2o22_x2: 1
a4_x2: 1
mx2_x2: 1
no4_x1: 1
buf_x2: 1
Total: 220
Saving critical path in xsch color f ile ’smultiplier4.xsc’...
End of boog...
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