Stats

  • Locked Locked
  • Replies 3
  • Subscribers 61
  • Views 1620
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Does RC excutes the commands between dc_script_begin/dc_script_end?

archive

If I have dc_script_begin/dc_script_end in RTL with some don't touch commands in between, should the cells become preserved?

module a (...)
input ..
output ..

//synopsys dc_script_begin
//set_dont_touch *
//synopsys dc_script_end

cell1...
cell2...
cell3..
endmodule

After elab, the preserve attribute for cell1, cell2, and cell3 are still false. But if I put ""set_dont_touch *"" in my run script, after elab the preserve attribute for these cells are true.

Why is this? Have anyone seen this in their design?


Originally posted in cdnusers.org by mximdal
Parents Reply Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.