Icc2 use report_ Placement check floorplan

1、 Application scenarios

Every time floorplan After that, take time to check channel Width ,sram The direction of , Is there any overlap Problems, etc. , and place Then often because sram On congestion The problem needs to be iterated and re floorplan, Actually ICC2 There are orders to check these problems ,report_placement.

2、 Refer to the order

report_placement \
 -wirelength none \
 -hard_macro_orientation_violation \
 -hard_macro_overlalp \
 -macro_spacing_rule \
 -swimming_pool_area \
 -hard_macro_route_over

among ：

1）-wirelength none, The default report is the total line length , Generally, I don't read this part of the report , set none, Skip check .

2）-hard_macro_orientation_violation, Check hard macro The direction of , Every hard macro There are allowed placement directions , Generally, to ensure poly In the same direction , So no rotation 90 degree .

3）-hard_macro_overlalp, Check hard macro The overlapping problem of .

4）-macro_spacing_rule,hard macro Between spacing problem , Here you need to set two app option.

set_app_options -name plan.macro.spacing_rule_heights -value {0um  0um}
set_app_options -name plan.macro.spacing_rule_widths  -value {1um 10um}

-value The previous value in represents the next two hard macro Of spacing, The latter value represents adjacent hard macro Between channel Width ,-value It means if hard macro Between spacing If it is not equal to the previous value, it must be greater than the latter value ,{0 0} It means no inspection ,height and width It can be understood as hard macro Arranged vertically and horizontally spacing.

5）-swimming_pool_area, Check placement blockage or hard macro Form a closed space , This placement blockage Include soft and partial.

6）-hard_macro_route_over, Check hard macro Upper congestion situation , It's better to be here create_placement -floorplan Then use , Yes standard cell Distribution can be reported correctly , Refer to this part of the report to adjust floorplan, Than place It is much more convenient to adjust after iteration .

overlap Use with direction problems check_legality Can also check , however report_placement The inspection is obviously more comprehensive , More suitable for floorplan The inspection of .