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  • How to implement $sformatf on register models

How to implement $sformatf on register models

UVM 6660
#RAL 11 # UVM #ASSERTIONS ... 7
Sv-hustler
Sv-hustler
Full Access
38 posts
December 20, 2022 at 10:36 pm

Hi

I have four regmodels with names cp_0,cp_1,cp_2, and cp_3. While using the register models the code for all four is the same instead of doing repetitive work I wanted to use $sformatf in place of numerics
m_p_rm.$sformatf("cp_%0d",regr).system.read(.status(status),.value(rdVal),.parent(this));
where regr is number between 0 to 2 .

I'm having compilation errors saying cant have an identifier .

Any help in formating this reg model ?

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chr_sue
chr_sue
Full Access
3846 posts
December 20, 2022 at 10:53 pm

In reply to Sv-hustler:

You want to implement a hierarchical path using $sformatf. A hierarchical path consists of instance/object names, but $sformatf creares string and not a name.

Sv-hustler
Sv-hustler
Full Access
38 posts
December 21, 2022 at 6:42 am

In reply to chr_sue:

Thanks for the reply. So the only way possible is to repeat the code for different models ?

I wanted to avoid this repetitive work

cgales
cgales
Forum Moderator
1951 posts
December 21, 2022 at 6:47 am

In reply to Sv-hustler:

The RAL allows you to look up a register by name. While not as clean as accessing a register directly, it gives you the flexibility to use $sformatf() to get a register handle.

Sv-hustler
Sv-hustler
Full Access
38 posts
December 21, 2022 at 7:01 am

In reply to cgales:

regr= $sformatf("m_cp%0d",quad_var);

m_pc_rm.get_block_by_name(regr).registers.system.read(.status(status),.value(rdVal),.parent(this));

This has an error : registers not a class item /

Solution

Solution

cgales
cgales
Forum Moderator
1951 posts
December 21, 2022 at 7:21 am

In reply to Sv-hustler:

The get_block_by_name() returns a uvm_reg_block handle. You will need to $cast it to your specific block type to be able to access the registers.

Sv-hustler
Sv-hustler
Full Access
38 posts
December 21, 2022 at 11:53 am

In reply to cgales:

Thanks cgales . $cast didn't pop up in my thoughts

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