x86_64 in FC4?

Chip Turner cturner at redhat.com
Fri Feb 4 23:45:52 UTC 2005

Roland McGrath <roland at redhat.com> writes:

> Unlike other architectures with 32-bit and 64-bit flavors, where the
> biggest change in 64-bit binaries is using twice as much space for a lot of
> things, the x86-64 architecture also has twice as many registers as the
> 32-bit x86 and so 64-bit compiled code tends to perform noticeably better.

Aren't those registers available to 32bit apps, though, should the
compiler choose to make use of them?


Chip Turner                   cturner at redhat.com
                              Red Hat, Inc.

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