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Re: [f-cpu] dynamic code reuse

On Sun, Dec 07, 2003 at 04:19:58PM +0000, Nicolas Boulay wrote:
> There is a branch of studies concerning the reuse of soon calculated value in 
> code.
> http://citeseer.nj.nec.com/sodani97dynamic.html
> The idea from the paper is that there is always some result in the code that 
> have been soon calculated. The idea is to reuse the result instead of 
> recalulate it. Increase speed could reach 20%.
> This gave me an idea but with software support.
> This is a kind of jump instruction. The jump take some register and one 
> adresse. If the content of the r register + the PC match a internal specific 
> cache the result of 2w register is set and the jump occur.

Sounds a lot like `speculative execution' to me.
Disclaimer: I didn't read the paper yet.

> To fill the cache, some thing "watch" the result calculated  where the 
> instruction is supposed to jump. In case of interrupt, this is lost to avoid 
> confusion and to stay stateless.
> This instruction needed to be handle carrefully by the compiler. So what's up 
> in the area ?

Rien, I suppose.

 Michael "Tired" Riepe <Michael.Riepe@stud.uni-hannover.de>
 "All I wanna do is have a little fun before I die"
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