> Is the answer "it's using an ISA with 64-bit registers and addresses"? > This actually can be broken down into the "registers" and "addresses" > portion, but, in practice, the two tend to go together. (Always true > on most "64-bit" ports, a real question on amd64 (and others, if any) > which support 32-bit userland.)
actually -- our mips64 ports largely use N32 userland, which is 64 bit registers and 32 bit addresses. this is also what linux calls "x32" for x86 platforms. obviously, this does require a 64 bit cpu. .mrg.
