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Date:      Thu, 15 Nov 2001 10:14:53 +1030
From:      Greg Lehey <grog@FreeBSD.org>
To:        Mark Peek <mark@peek.org>
Cc:        cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/sys/powerpc/powerpc machdep.c
Message-ID:  <20011115101453.C33267@monorchid.lemis.com>
In-Reply-To: <p05101008b818a9b71348@[207.76.207.129]>
References:  <200111130044.fAD0iL972345@freefall.freebsd.org> <20011115093118.G40270@monorchid.lemis.com> <p05101008b818a9b71348@[207.76.207.129]>

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On Wednesday, 14 November 2001 at 15:26:58 -0800, Mark Peek wrote:
> At 9:31 AM +1030 11/15/01, Greg Lehey wrote:
>> On Monday, 12 November 2001 at 16:44:21 -0800, Mark Peek wrote:
>>> mp          2001/11/12 16:44:21 PST
>>>
>>>   Modified files:
>>>     sys/powerpc/powerpc  machdep.c
>>>   Log:
>>>   Don't enable FP in the kernel. It is not needed when -msoft-float is used.
>>
>> Why is FP needed at all?
>
> Without -msoft-float, gcc uses the FP registers for code optimization
> like 8 byte structure copies. For instance, this contrived example:
>
> <snip>

Ah, understood.  Thanks.

Greg
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