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From: Grant Grundler <grundler@parisc-linux.org>
To: John David Anglin <dave@hiauly1.hia.nrc.ca>
Cc: Kyle McMartin <kyle@mcmartin.ca>, parisc-linux@lists.parisc-linux.org
Subject: Re: [parisc-linux] PA 2.0 float conversion to unsigned long long
Date: Mon, 18 Jul 2005 13:45:28 -0600	[thread overview]
Message-ID: <20050718194528.GD11016@colo.lackof.org> (raw)
In-Reply-To: <200507140356.j6E3uShf022345@hiauly1.hia.nrc.ca>

On Wed, Jul 13, 2005 at 11:56:28PM -0400, John David Anglin wrote:
...
> That's what I was thinking when I wrote the message.  Under linux,
> both the left and right halves of fr22 end up with 0x80000000.  Under
> hpux, the left result is 0x80000000 and the right 0.  The only other
> explanation is that the c3k fpu has a bug that's not present in an A500
> (doubtful).

If they are running at the same clock speed, they are likely to have
identical CPUs. Some of the 440Mhz boxes did roll CPU HW version
after initial release - including some SMP bugs that C3K wouldn't
be exposed to. I'm skeptical it's a bug in the FPU unless you
can demonstrate the same code works on another (newer) CPU model.

thanks,
grant
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  parent reply	other threads:[~2005-07-18 19:45 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-07-14  2:53 [parisc-linux] PA 2.0 float conversion to unsigned long long John David Anglin
2005-07-14  3:32 ` Kyle McMartin
2005-07-14  3:56   ` John David Anglin
2005-07-14  6:29     ` Joel Soete
2005-07-18 19:45     ` Grant Grundler [this message]
2005-07-18 22:34       ` John David Anglin
  -- strict thread matches above, loose matches on Subject: below --
2005-07-19 17:41 soete.joel
2005-07-19 18:29 ` John David Anglin
2005-07-20 15:30 soete.joel
2005-07-22 22:04 ` Joel Soete
2005-07-22 23:16   ` Kyle McMartin
2005-07-23  9:39     ` Joel Soete
2005-07-25  9:57 Joel Soete

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