[Vm-dev] CogVM Execution Flow

[tim Rowledge]

> On 13-06-2016, at 7:21 PM, Eliot Miranda <eliot.miranda at gmail.com> wrote:
>  If ever it misses, the send site will get bound to a "closed" PIC, a little jump table created specific to that send site, that can hold up to 6 class index comparison, jump pairs (it can dispatch up to 6 classes of receiver) and if there are more than 6, will get rewritten to an "open" PIC specific to the selector, that probes the first level method lookup cache.

Whilst reading that a strange thought leaped up from somewhere and landed in my head; might it be useful to just replace the final pic-miss jump with a jump instead to the open lookup but keep the other six previously carefully built cases? It’s not like they’ve gone away in any sense. Might need to change the use of the ClassReg there too? After all, the open lookup is really just a pic-miss that doesn’t build a new cpic entry...


tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
Useful random insult:- Thinks E=MC^2 is a rap star.