regarding datapath and macro placement

[sathyanarayana raoh]

hi,
answer to these questions plz


1. how to know the datapath and clock path from timing reports...
2. any script for macro placement . can i group macro according to their clock
3.in sdf file i dint see which clock is given to which macro...how can i know

 

[morris_mano]

Answer to 1) Usually in timing report, there is data arrival time and data required time. The path shown with respect to data arrival time is data path and the path shown with respect to data required time is clock path. Then slack is calculated as difference between arrival and required time. However different tools output their timing report differently and you may even customize some tools timing report output.