From: "La Monte H.P. Yarroll" <piggy@timesys.com>
To: Dan Malek <dan@embeddededge.com>
Cc: Tom Rini <trini@kernel.crashing.org>,
Kumar Gala <kumar.gala@freescale.com>,
LKML <linux-kernel@vger.kernel.org>,
Greg Weeks <greg.weeks@timesys.com>,
LinuxPPC-dev Development <linuxppc-dev@lists.linuxppc.org>
Subject: Re: [BUG] PPC math-emu multiply problem
Date: Mon, 09 Aug 2004 18:18:25 -0400 [thread overview]
Message-ID: <4117F831.90202@timesys.com> (raw)
In-Reply-To: <6FBD1B21-EA2B-11D8-8382-003065F9B7DC@embeddededge.com>
Dan Malek wrote:
>
> On Aug 9, 2004, at 12:56 PM, Tom Rini wrote:
>
>> Has anyone had a problem with this? If not, I'll go and pass it
>> along...
>
>
> The default rounding mode should be whatever is defined
> by IEEE. I thought the emulator used the proper default value
> and if want something different it should be selected by
> the control register. Maybe the emulator isn't implementing
> the control register properly.
>
> Thanks.
>
> -- Dan
The submitted patch changing the default rounding mode
caused several regressions in the LSB suite, so it was
NOT the correct fix.
Greg made a finer-grained change which seems to have
made LSB happy. Unfortunately, he's on vacation this
week, or I'd have him submit the patch he finally used.
I THINK he changed the rouding mode only for a single
corner case in the normalization macro, but that's
about all I remember...
--
Anyone who quotes me in their sig is an idiot. -- Rusty Russell's sig
next prev parent reply other threads:[~2004-08-09 22:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-29 13:14 [BUG] PPC math-emu multiply problem Greg Weeks
2004-07-29 14:06 ` Kumar Gala
2004-07-29 14:26 ` Greg Weeks
2004-07-29 19:22 ` Dan Malek
2004-07-29 19:47 ` La Monte H.P. Yarroll
2004-07-30 14:45 ` Greg Weeks
2004-07-30 15:23 ` Greg Weeks
2004-08-09 16:56 ` Tom Rini
2004-08-09 17:42 ` Dan Malek
2004-08-09 22:18 ` La Monte H.P. Yarroll [this message]
2004-08-09 22:23 ` Tom Rini
2004-08-16 13:02 ` Greg Weeks
2004-08-16 14:48 ` Tom Rini
2004-08-16 18:28 ` Greg Weeks
2004-08-16 18:35 ` Tom Rini
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