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Re: libgcc2

From: Ian Lance Taylor <iant at google dot com>
To: EggenmÃller Bernd <egge-b at gmx dot de>
Cc: Andrew Pinski <pinskia at gmail dot com>, gcc at gcc dot gnu dot org
Date: Mon, 17 May 2010 11:33:09 -0700
Subject: Re: libgcc2
References: <1273493360.28372.ezmlm@gcc.gnu.org> <4BEA9B3E.6020306@gmx.de> <mcreihhi7dy.fsf@dhcp-172-17-9-151.mtv.corp.google.com> <4BEAAD7B.7020009@gmx.de> <mcr8w7pmbtb.fsf@dhcp-172-17-9-151.mtv.corp.google.com> <4BEC1EE3.80002@gmx.de> <AANLkTinrpe6FHHY9ptWTAYs7YLjncfQi97bDaROsoT9n@mail.gmail.com> <4BF16D5D.5040008@gmx.de>

EggenmÃller Bernd <egge-b@gmx.de> writes:

> Andrew Pinski schrieb:
>> On Thu, May 13, 2010 at 8:46 AM, EggenmÃller Bernd <egge-b@gmx.de> wrote:
>>   
>>> Is there any implementation with less registers like this.
>>>     
>>
>> libgcc2 is written in C; so if it fails to compile you need to fix up
>> your backend.  There might need some middle-end fixes too with this
>> small number of registers used.  You might just want to disable double
>> register sized integer types to fix this in the end.
>>
>> Thanks,
>> Andrew Pinski
>>
>>   
> How can I disable double register sized integer types. Is there a
> constant to do this.

Make sure that LONG_TYPE_SIZE and LONG_LONG_TYPE_SIZE are single
register sized.  Make TARGET_SCALAR_MODE_SUPPORTED_P return false for
DImode.  You'll probably have to tweak the way that libgcc2 is built,
but I'm not sure just how.

Ian

References:
- libgcc2
  - From: Eggenmüller Bernd
- Re: libgcc2
  - From: Ian Lance Taylor
- Re: libgcc2
  - From: EggenmÃller Bernd
- Re: libgcc2
  - From: Andrew Pinski
- Re: libgcc2
  - From: EggenmÃller Bernd

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