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Re: [PATCH] PowerPC multiply-add (was patch: rs6000 specific)

From: Richard Henderson <rth at redhat dot com>
To: Dale Johannesen <dalej at apple dot com>
Cc: David Edelsohn <dje at watson dot ibm dot com>, gcc-patches at gcc dot gnu dot org
Date: Tue, 4 Dec 2001 16:20:43 -0800
Subject: Re: [PATCH] PowerPC multiply-add (was patch: rs6000 specific)
References: <200112042246.RAA26268@makai.watson.ibm.com> <4602C132-E90A-11D5-8923-003065C86F94@apple.com>

On Tue, Dec 04, 2001 at 02:57:21PM -0800, Dale Johannesen wrote:
> It is sad, but of course the machine-independent parts currently have
> no concept of multiply-add; these patterns arise from combine.

Combine does a lot of canonicalization.  If you have to add
15 variants of one multiply-add, then combine should be made
smarter.

r~

References:
- Re: [PATCH] PowerPC multiply-add (was patch: rs6000 specific)
  - From: David Edelsohn
- Re: [PATCH] PowerPC multiply-add (was patch: rs6000 specific)
  - From: Dale Johannesen

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