Do computational heavy lifting on the server. Flex/Flash was always designed for building user interfaces/animation and not as a computation engine. Even built as an air project, you won't be able to step into machine code territory.
Create a server side computation engine, use Flex to build an interface to it.
If you require 8086 machine code, then that portion isn't very
"multiplatform". That's one of the reasons such a feature isn't available
in Flash today and probably not in the future.
AIR apps can call native processes. You might want to look into that.
Thank you very much for your responses.
I believe such a facility is not available or ever will be.
I agree with your postulation that 8086 machine language is not "multiplatform" however, the delivery of Flex is and an API that provides details of the end-users processor and the ability to make machine language calls in a protected environment would be a great advantage.
I think it is quite short-sighted to rule this functionality out.
Take a look at Alchemy:
It could be a good way to run your client computations at C-like speeds rather than at ActionScript-like speeds.
Adobe Flex SDK Team
File an enhancement request at bugs.adobe.com/jira. If you can get enough
votes and good scenarios for it, it will get appropriately prioritized.