From: Michael Cree <mcree@orcon.net.nz>
To: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Linux Arch Mailing List <linux-arch@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Using __int128 on 64-bit architectures
Date: Sun, 21 Apr 2013 21:51:20 +1200 [thread overview]
Message-ID: <20130421095120.GA6508@omega> (raw)
In-Reply-To: <20130421193531.43965f592f00dfd6e3cfcf45@canb.auug.org.au>
On Sun, Apr 21, 2013 at 07:35:31PM +1000, Stephen Rothwell wrote:
> On Sun, 21 Apr 2013 05:29:28 +0100 (BST) "Maciej W. Rozycki" <macro@linux-mips.org> wrote:
> >
> > Hmm, nobody has replied, so just FYI such widening multiplication is
> > available in all 64-bit MIPS hardware and GCC has supported it since 4.4
> > or mid 2008 (older versions used a libgcc __multi3 helper, not quite so
> > efficient as you can imagine).
>
> i.e. for gcc 4.6.3, 64 bit powerpc calls out to __multi3
>
> The same is true for sparc64.
Likewise, with gcc-4.6.3, alpha calls out to __multi3.
Cheers
Michael.
prev parent reply other threads:[~2013-04-21 9:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-17 23:04 Using __int128 on 64-bit architectures H. Peter Anvin
2013-04-21 4:29 ` Maciej W. Rozycki
2013-04-21 9:35 ` Stephen Rothwell
2013-04-21 9:51 ` Michael Cree [this message]
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