On Wed, Feb 16, 2011 at 12:35 PM, Chris Metcalf <cmetc...@tilera.com> wrote: > For what it's worth, the Tilera 64-bit architecture (forthcoming) includes > support for a 32-bit compatibility layer that is similar to x32. It uses > 64-bit registers throughout (e.g. for double and long long), but 32-bit > addresses. The addresses between 2GB and 4GB are not directly usable as > 64-bit addresses since we sign-extend all 32-bit values to make the ISA > more straightforward. We use the "compat" layer to provide our syscall > table, since we don't have a traditional compatibility layer in this mode > (unlike x86_64 and i386).
This sounds more like MIPS' n32 than x32 really. -- Pinski
