From: Aurelien Jarno <aurelien@aurel32.net>
To: Stuart Brady <sdbrady@ntlworld.com>
Cc: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] [5949] target-ppc: memory load/store rework
Date: Sat, 13 Dec 2008 12:15:20 +0100 [thread overview]
Message-ID: <20081213111520.GD17729@volta.aurel32.net> (raw)
In-Reply-To: <20081213011803.GC9457@miranda.arrow>
On Sat, Dec 13, 2008 at 01:18:03AM +0000, Stuart Brady wrote:
> On Mon, Dec 08, 2008 at 06:11:22PM +0000, Aurelien Jarno wrote:
> > - Don't swap values twice for bit-reverse load/store functions
> > in little endian mode.
>
> If I've read this correctly, it seems to me that we would still swap
> twice on little endian hosts when when emulating little endian mode or
> performing bit-reverse loads/stores. Bit-reverse loads/stores under
> little endian emulation on a little endian host would have actually
> resulted in *three* byteswaps!
I was actually speaking about swapping in the TCG code. The global
byteswapping has been actually reduced from 3 to 2 in the worst case.
--
.''`. Aurelien Jarno | GPG: 1024D/F1BCDB73
: :' : Debian developer | Electrical Engineer
`. `' aurel32@debian.org | aurelien@aurel32.net
`- people.debian.org/~aurel32 | www.aurel32.net
prev parent reply other threads:[~2008-12-13 11:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-08 18:11 [Qemu-devel] [5949] target-ppc: memory load/store rework Aurelien Jarno
2008-12-13 1:18 ` Stuart Brady
2008-12-13 7:25 ` Blue Swirl
2008-12-13 11:17 ` Aurelien Jarno
2008-12-13 11:15 ` Aurelien Jarno [this message]
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