In that case, how could I implement loops while still having the capability to
send messages to other caches inside of those loops? Is there any way to do it
with C++?
- Alex
________________________________
From: Malek Musleh <[email protected]>
To: Alex Tomala <[email protected]>; gem5 users mailing list
<[email protected]>
Sent: Saturday, November 2, 2013 4:22:28 PM
Subject: Re: [gem5-users] Does SLICC support loops
Hi Alex,
SLICC does not support loops for reasons that can be read in the SLICC README
file:
src/mem/slicc/README
Question: How comes there is no "for" loop statement in slicc?
Answer: Been there, done that. That is easy to add, first of all. But unbound
loop make slicc eventually un-synthesizable. We want to avoid that. If you want
to loop through a bounded array do something, make the action done in a
external interface in RubySlicc_Util.h. Inside, you just pass the vector as
parameter to the external interface to achieve the same effects.
Another bad thing of using loop statement like for is that we can not determine
how many buffer space to allocate before the transition. With a vector, if it
easy to understand we can always allocate the worst case number of hardware
resources.
As I have suggested to you in a previous question, you *could* modify SLICC to
handle additional things (e.g. parameters, loops, etc) but in my experience it
has been far easier to do any such hacking/interfacing through an external
object (as this Q/A from the README also suggests).
Malek
On Sat, Nov 2, 2013 at 4:14 PM, Alex Tomala <[email protected]> wrote:
Hello,
>
>
>I am making a new cache coherence protocol in Gem5. In one of my actions, I
>require using a while loop to send messages to other caches depending on
>certain circumstances. I am wondering if there is a while loop in SLICC or if
>I need to do something else. My code would look something like this:
>
>
>while (x < totalNum()){ //pretend totalNum() is a C++ function that returns
>the number of cache
>if (fulfills certain conditions){
> enqueue(replyChild_out, ParentReplyType, latency=issue_latency) {
> out_msg.Address := address;
> out_msg.Type := ParentReplyType:PYS;
> out_msg.Sender := machineID;
> out_msg.Destination.add(in_msg.Requestor);
> }
>}
>}
>
>
>I don't know if this is possible or not.
>
>
>Best regards,
>
>
>Alex Tomala
>_______________________________________________
>gem5-users mailing list
>[email protected]
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