From: Greg Weeks <greg.weeks@timesys.com>
To: Eugene Surovegin <ebs@ebshome.net>
Cc: linuxppc-embedded@ozlabs.org
Subject: Re: floating point operation of ppc
Date: Fri, 11 Nov 2005 14:47:55 -0500 [thread overview]
Message-ID: <4374F56B.8080500@timesys.com> (raw)
In-Reply-To: <20051111193516.GA31237@gate.ebshome.net>
Eugene Surovegin wrote:
>On Fri, Nov 11, 2005 at 07:51:31AM -0500, Greg Weeks wrote:
>
>
>>lily wrote:
>>
>>
>>
>>>hi,all:
>>>i build an embedded linux on powerpc 405ep,i need execute floating
>>>point operation,and i enable "math emulate" option in kernel, i run a
>>>while(1)loop ,in the loop there was floating point expression ,after
>>>test ,i found the while (1) exit because of the floating point
>>>computation,that is the floating point can't execute on ppc
>>>stablely.Is there someone meets the same problems ,please give me some
>>>suggestion,thanks!!!
>>>
>>>
>>The 405ep has some errata on floating point use.
>>
>>
>
>Are you sure it was 405ep? There is no floating point errata for this
>chip due to the simple reason, it doesn't support floating point in
>hardware at all.
>
>You probably confusing it with 440ep.
>
>
>
You're right. It was the 440ep. The 405ep BSP is using the 4xx
toolchain. I don't think I've ever tried the math emulator on a 405.
Greg Weeks
prev parent reply other threads:[~2005-11-11 19:47 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <000a01c5e6a0$1eba5150$f10cc9ca@lcj3bdfa4e34dd>
2005-11-11 9:13 ` floating point operation of ppc lily
2005-11-11 12:51 ` Greg Weeks
2005-11-11 19:35 ` Eugene Surovegin
2005-11-11 19:47 ` Greg Weeks [this message]
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