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From: Kumar Gala <galak@kernel.crashing.org>
To: Zang Roy-r61911 <tie-fei.zang@freescale.com>
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Subject: Re: [PATCH] Fix rounding bug in emulation for double floatoperating
Date: Wed, 12 Dec 2007 07:36:04 -0600
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Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>, Liu Yu <B13201@freescale.com>,
	David Gibson <david@gibson.dropbear.id.au>
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>> When I run this on a G5 (w/HW FP) I get:
>>
>> dmul 3fe0000000000000 * 1 = 0 expected 0 (PASS)
>> dmul bfe0000000000000 * 1 = 8000000000000000 expected 0 (PASS)
>> dmul 8000000000000001 * bfe0000000000000 = 0 expected 0 (PASS)
>>
>> ddiv 1 / 4000000000000000 = 0 expected 0 (PASS)
>>
>> and on the 85xx w/FP emu:
>>
>> dmul 3fe0000000000000 * 1 = 0 expected 0 (PASS)
>> dmul bfe0000000000000 * 1 = 8000000000000000 expected 0 (PASS)
>> dmul 8000000000000001 * bfe0000000000000 = 0 expected 0 (PASS)
>>
>> ddiv 1 / 4000000000000000 = 0 expected 0 (PASS)
>>
>> Maybe I'm missing where the error is.
> I am missing ...
> It is supposed to run based on previous IEEE 754 patch.
> http://ozlabs.org/pipermail/linuxppc-dev/2007-February/031351.html

Ok, but the test case should care if we are doing full "classic"  
emulation or fixup of e500 FP.

- k