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Subject: Does RC excutes the commands between dc_script_begin/dc_script_end?
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mximdal
Posts: 0
Online: User is Offline
2/11/2005 4:04 PM  
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?
synthman
Posts: 17
Online: User is Offline
2/14/2005 8:05 AM  
According to the User Guide, this is supported. So it looks like a bug here. We'll file a PCR to R&D.
synthman
Posts: 17
Online: User is Offline
2/14/2005 8:07 AM  
According to the User Guide, this is supported. So it looks like a bug here. We'll file a PCR.
mximdal
Posts: 0
Online: User is Offline
2/15/2005 11:53 AM  
Thanks.
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Forums > Digital IC > Synthesis and test > Does RC excutes the commands between dc_script_begin/dc_script_end?


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