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tzar
Senior
Joined: Nov 28, 2007
Posts: 69
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 Posted: Mon Sep 05, 2011 7:53 am Post subject: How to use packages sensibly |
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Hi,
I often see it recommended that one should group related c;ass definitions into a single package. For example I have seen it recommended that all components of a UVM agent be defined in a single package. In one sense this seems reasonable in that if you want to make use of the agent you have a single source for all components. However this would make the package file a long,complex and difficult to edit file. If a revision control mechanism is being used only one person can work on any element of the agent (assuming only single checkouts are allowed).
In the past I have always preferred to keep each component in a separate file as I have found this easier to work with.
Is it all down to a matter of personal preference or am I missing the big picture?
Thanks |
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vhdlcohen
Industry Expert
Joined: Jan 05, 2004
Posts: 1237
Location: Los Angeles, CA
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| Posted: Mon Sep 05, 2011 8:41 am Post subject: Re: How to use packages sensibly |
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| tzar wrote: | Hi,
I often see it recommended that one should group related c;ass definitions into a single package. For example I have seen it recommended that all components of a UVM agent be defined in a single package. In one sense this seems reasonable in that if you want to make use of the agent you have a single source for all components. However this would make the package file a long,complex and difficult to edit file. If a revision control mechanism is being used only one person can work on any element of the agent (assuming only single checkouts are allowed).
In the past I have always preferred to keep each component in a separate file as I have found this easier to work with.
Is it all down to a matter of personal preference or am I missing the big picture?
Thanks |
Mentor recommends the use of separate files, but using the `include of files in packages. Below are examples from code that was generated using the Certe templates http://www.mentor.com/products/fv/certe/
| Code: | package agent_pkg;
`include "ovm_macros.svh"
import ovm_pkg::*;
import ovm_container_pkg::*;
import fifo_pkg::*;
`include "trans.svh"
`include "driver.svh"
`include "monitor.svh"
`include "agent_config.svh"
`include "agent.svh"
endpackage: agent_pkg
package env_pkg;
`include "ovm_macros.svh"
import ovm_pkg::*;
import agent_pkg::*;
`include "env_config.svh"
`include "coverage.svh"
`include "scoreboard.svh"
`include "env.svh"
endpackage: env_pkg
package test_pkg;
`include "ovm_macros.svh"
import ovm_pkg::*;
import ovm_container_pkg::*;
import sequences_pkg::*;
import agent_pkg::*;
import env_pkg::*;
`include "test_base.svh"
`include "test1.svh"
endpackage: test_pkg
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Last edited by vhdlcohen on Mon Sep 05, 2011 9:05 am; edited 1 time in total |
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tzar
Senior
Joined: Nov 28, 2007
Posts: 69
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| Posted: Mon Sep 05, 2011 9:00 am Post subject: |
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Ah, that makes sense.
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dave_59
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Joined: Jun 22, 2004
Posts: 974
Location: Fremont, CA
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