From: Aurelien Jarno <aurelien@aurel32.net>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] TCG: 128 bit ops?
Date: Thu, 4 Sep 2008 16:35:19 +0200 [thread overview]
Message-ID: <20080904143519.GA11924@volta.aurel32.net> (raw)
In-Reply-To: <D1F4A45F-4F7A-477E-8045-4886C45949BA@gmail.com>
On Thu, Sep 04, 2008 at 01:10:39PM +0200, Andreas Färber wrote:
> Hello,
>
> Am I correct in seeing that TCG offers no i128 ops? Would this be useful
> to add to TCG, internally reusing the i64/i32 code? ppc needs 128-bit
> temporaries for Altivec instructions. It uses a union ppc_avr_t of (among
> others) two uint64_t.
>
> Or should I just use two i64 temporaries with a local macro/helper?
> It's not used much in ppc but I thought it might be useful to share with
> other architectures.
>
Currently TCG doesn't support i128 ops, but I also agree it would be
nice to have it. I think it can benefits for example to sparc64 which
has 128-bit fp support.
--
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' aurel32@debian.org | aurelien@aurel32.net
`- people.debian.org/~aurel32 | www.aurel32.net
next prev parent reply other threads:[~2008-09-04 14:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-04 11:10 [Qemu-devel] TCG: 128 bit ops? Andreas Färber
2008-09-04 14:35 ` Aurelien Jarno [this message]
2008-09-04 15:30 ` Blue Swirl
2008-09-07 14:01 ` Paul Brook
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