07_19_2010

DEF vs TCL for macro placement

1. def, the location inside is the lower left corner

2. tcl, the origin is the location when the cell is in N orientation.

So tcl is not that straight forward, so I decide to use def instead of tcl for the macro placement,

sample code:

set_attibute [all_macro_cells] is_fixed false

read_def macro_place.def

set_attibute [all_macro_cells] is_fixed true

-Jeff

def vs fixed

I did one experiment: all the macro are fixed, I imported a def file with the cell as fixed. ICC didn't complain, it honored my def cell placement.

So the conclusion is that I will use def for the macro placement, the def file will be golden.