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Preserving structure in RTL Compiler

Aram Shahinyan

 Dear all,

I have a AND-OR structure written in RTL in a module. After the synthesis I see that the same logic is implemented using different logic elements in different modules. In one module I see AND-OR is formed with 4 instances, in other module with 5 instances.

Is there a way to tell RC to use exactly the same AND-OR structure in different modules, that are using same piece of RTL code?

Thanks,

Aram

Parents

  •  If u start from RTL u are giving the synthesis engine the power to do exactly that, synthesize. You can certainly pre-compile and even harden a small block if you want to replicate / clone it several times in your desig. There are numerous ways to write the same function in RTL. What you are trying to do is frequently done but the scale of what you are doing needs to justify the effort.  Adding hierarchy to the logic in question can be a good way to identify the logic even if it is structurallly different in some cases

     

    gh-

Reply

  •  If u start from RTL u are giving the synthesis engine the power to do exactly that, synthesize. You can certainly pre-compile and even harden a small block if you want to replicate / clone it several times in your desig. There are numerous ways to write the same function in RTL. What you are trying to do is frequently done but the scale of what you are doing needs to justify the effort.  Adding hierarchy to the logic in question can be a good way to identify the logic even if it is structurallly different in some cases

     

    gh-

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