On 4/22/07, Paul Brook <[EMAIL PROTECTED]> wrote:
I notice that you haven't provided any way to access the ALU carry flag. This is going to make unsigned comparisons and doubleword (64-bit) arithmetic very hard. It's not impossible (I've worked on compiler ports for such machines), but gets really ugly. FWIW MIPS exposes it via the sltu instruction. If you've deliberately decided this isn't an important feature for this application then it's maybe worth mentioning that in the architecture docs.
The simplification is well worth the extra programming complexity in those rare situations where we'll need it. We intentionally did it the way of early MIPS designs. But you're right that we should document it! -- Timothy Normand Miller http://www.cse.ohio-state.edu/~millerti Open Graphics Project _______________________________________________ Open-graphics mailing list [email protected] http://lists.duskglow.com/mailman/listinfo/open-graphics List service provided by Duskglow Consulting, LLC (www.duskglow.com)
