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Date: Wed, 16 Feb 2011 20:39:00 -0000
Message-ID: <AANLkTimy7LaUE_pOOfE3ai37QEKhj_irNPacRq1dVBSP@mail.gmail.com>
Subject: Re: x32 psABI draft version 0.2
From: Andrew Pinski <pinskia@gmail.com>
To: Chris Metcalf <cmetcalf@tilera.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>, x32-abi@googlegroups.com, 	"H.J. Lu" <hjl.tools@gmail.com>, GCC Development <gcc@gcc.gnu.org>, 	Binutils <binutils@sourceware.org>, GNU C Library <libc-alpha@sourceware.org>
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On Wed, Feb 16, 2011 at 12:35 PM, Chris Metcalf <cmetcalf@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. =C2=A0It=
 uses
> 64-bit registers throughout (e.g. for double and long long), but 32-bit
> addresses. =C2=A0The addresses between 2GB and 4GB are not directly usabl=
e as
> 64-bit addresses since we sign-extend all 32-bit values to make the ISA
> more straightforward. =C2=A0We use the "compat" layer to provide our sysc=
all
> 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