Please don't do html mail... And please CC the linuxBIOS list. I admit it is not a real substitute for documentation but with these kinds of discussions happening in public the information is distributed more widely and more people can answer question or take action based on a conversation.
Jeff Pipkins jpipkins@austin.rr.com writes:
This is a really cool concept, and a very useful tool. <br>
<br> It took me a while to figure out what romcc was from reading the romcc code and the LinuxBIOS code. I think it would be worthwhile to put a copy of the email below in the romcc directory in the source tree, especially if you think it'll be a while before any formal documenation exists.
That sounds like a good idea. I will see about that.
It would also be helpful to have a short comment in the C code that depends on romcc to say so. Otherwise, it's a real head-twister to see a C program setting up mtrr's! ;^)<br>
Well changing mtrrs is not romcc specific. We do that even in the freebios1 tree. With romcc you can just run the C code earlier. The real difference is that with romcc rdmsr wrmsr are done with builtins whereas with gcc you need to do inline asm.
I am in the processes of setting of the APIs in LinuxBIOS so that most code will work with or without romcc. You comment reminds me that I still have to sync of the rdmsr/wrmsr APIs...
<br> Nice piece of work, thanks in advance for the fun I'm going to have with it!<br>
Welcome.
And BTW I have just committed a change that reduces the algorithmic complexity of parts of the register allocator. So the compiler now should have a much more reasonable runtime.
Eric
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ebiederman＠lnxi.com