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Re: [PATCH] Fix Altivec problem with vmaddfp
- From: David Edelsohn <dje at watson dot ibm dot com>
- To: Alan Matsuoka <alanm at redhat dot com>
- Cc: Daniel Egger <degger at fhm dot edu>, gcc-patches at gcc dot gnu dot org
- Date: Mon, 22 Apr 2002 18:10:23 -0400
- Subject: Re: [PATCH] Fix Altivec problem with vmaddfp
>>>>> Alan Matsuoka writes:
Alan> I got this from Dale :
Alan> Dale Johannesen <dalej@apple.com>
Alan> On Monday, April 22, 2002, at 07:55 AM, Alan Matsuoka wrote:
>>
>> Operands 2 and 3 are in the wrong order.
Alan> I believe this showed up before and was traced to a bug in the Linux
Alan> assembler:
Alan> http://gcc.gnu.org/ml/gcc/2002-03/msg00602.html
Alan> http://gcc.gnu.org/ml/gcc/2002-03/msg00975.html
Alan> The darwin and AIX assemblers are correct, please be careful not to
Alan> break those targets.
However, Daniel Egger points out that the PEM and the PIM differ,
in which case the correct definition is ambiguous. Apple may have based
their assembler on the PEM and Linux on the PIM.
We can adopt Apple's precedent, and that may be the best solution,
but it may not be what originally was intended.
David