Research Article

Buffer Planning for IP Placement Using Sliced-LFF

Table 2

(a) The comparison between the SA-based and LFF-based floorplanner

Area ( m m 2 )Wirelength (mm)#Inserted Buffer/#Buffer#Successful Nets#Failed NetsTiming Slack per FN (ps)Time(s)
MethodsF1F2F1F2F1F2F1F2F1F2F1F2F1F2

Apte48.3253.25459.6563.737/123102/116103118521823.420.2460.15
Xerox86.2092.00671.5783.8114/203247/265388349391532.128.91090.3
Hp39.5640.56216.1196.060/12160/87145160581719.118.8350.2
Ami3332.0033.5096.7110.9194/386164/17620424720818.716.7261.3
Ami49172.2158.81489.01462.8277/545435/4473304481613043.041.27603.7
Playout460.6470.01205312970613/1316806/924156417883657156.452.5233046.6
M19834.5233.08618.0491.1594/1232741/8331587181353615717.814.92538120.6

Average+2.03%+3.74%+40.7% +14.3% −70.3% −10.3%×163

(b) The Comparison between the SA-based and LFF-based Floorplanner with larger needs of buffers

Area ( m m 2 )Wirelength (mm)#Inserted Buffer/#Buffer#Successful Nets#Failed NetsTiming Slack per FN (ps)Time(s)
MethodsF1F2F1F2F1F2F1F2F1F2F1F2F1F2

Ami3333.5034.0099.1104.3236/409339/354196227321114.313.83961.62
Ami49162.0162.41507.01505.2364/892812/9582993301844929.225.78904.74
Playout460.6467.712363121891240/28251597/19721230142139526535.432.8292052.5
M19833.2434.20606.2523.31329/35591677/25131240149344535115.614.33975138.3

Average+1.54%−1.42%+37.1% +15.5% −48.3% −8.6%×129