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In order to perform some optimizing algorithm, I need a good degree of precision in getting attributes from tcl dc_shell (synopsys Version D-2010.03-SP3). For example 

get_attribute CORE65LPLVT/HS65_LL_IVX9 cell_leakage_power

returns me 0.000001 while the actual value was 1.381e-6 (obtained through report_power).

I tried 

set report_default_significant_digits 10

but nothing changed. How can I get more significant digits?

marco6
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1 Answers1

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The global number of significant digits is set by the command below. The value must be between 0 and 13. Set command doesn't change the application variables, but set_app_var does.

set_app_var report_default_significant_digits 10

This variable can be set to its default value later.

set_app_var report_default_significant_digits -default

Most of the reporting commands also accept the following switch.

-significant_digits 10
  • I accepted your answer to help people who are looking for this. I don't have a copy of dc_shell to try, but I guess it makes sense to be able to distinguish between app-level and script-level variables! Thank you! :) – marco6 Jun 15 '17 at 21:47