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Re: splitting add instructions

From: "Paulo J. Matos" <pocmatos at gmail dot com>
To: gcc at gcc dot gnu dot org
Date: Tue, 19 Jul 2011 09:29:00 +0100
Subject: Re: splitting add instructions
References: <j01hrs$9ra$1@dough.gmane.org> <mcrtyaj1q62.fsf@coign.corp.google.com>

On 18/07/11 17:58, Ian Lance Taylor wrote:


Look at add<mode>3_cc in gcc/config/i386/i386.md.  Look at how
add<dwi>3_doubleword splits to use it.

Thanks Ian, from what Richard said I need an add that doesn't modify carry in order to follow the approach there. Since I don't I guess I have to look for how it is done in mn10300 and rx ports.

cheers,

--
PMatos

References:
- splitting add instructions
  - From: Paulo J. Matos
- Re: splitting add instructions
  - From: Ian Lance Taylor

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