On Thu, Apr 17, 2003 at 11:17:10AM -0700, Jun Sun wrote:
> It really depends on the applications. The biggest gain from 64bit,
> other than the obviously bigger address space, is 64bit data
> manipulation. A single 64bit instruction (add/sub/...) is carried
> out by several instructions in 32bit.
A big gain is the increased # of registers and better calling
sequence. Everyone sees that, not just people who want to use 64-bit
integers. At the moment you need to run the 64-bit kernel -- and the
new binutils & glibc -- in order to get n32 programs to work.