x32 abi support?

[Xose Vazquez Perez]

On 05/17/2012 06:19 AM, Matthew Garrett wrote:

> On Thu, May 17, 2012 at 12:28:29AM +0200, Xose Vazquez Perez wrote:
>> x32 makes intel be faster Atom Z2460 [1]

> I can't find any x86_64/ia32/x32 benchmarks in that article? Regardless,
> I'd agree that x32 is potentially useful on heavily resource-constrained
> interactive devices like phones. The quesiton is whether it's useful for
> any of the platforms that Fedora targets. Virtualisation is something I
> hadn't considered and it may be that there are benefits there, but I'd
> still appreciate some real figures before encouraging people to spend
> time on it.

see:

"x32 - a native 32-bit ABI for x86-64", by H. Peter Anvin.
A work-in-progress new ABI for x86 combines the memory footprint of a 
32-bit process with the enhanced capabilities of the x86-64 ISA.

<http://www.linuxplumbersconf.org/2011/ocw/system/presentations/531/original/x32-LPC-2011-0906.pptx>