Re: PPC cflags

-mmultiple *seems* (anecdotally) to make the apps I use run faster.  But 
then again, I have no real basis for comparison (a 1st rev g3 
blue-and-white, and the aforementioned Albook).

Also, adding -fsigned-char may be the default, but I do it anyway just 
because.  Habit, I guess (I do a lot of gentoo-on-sparc and alpha stuff).

chris.

:: Christopher Gautam Hota
:: Information Technology Specialist
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|| Microsoft Certified Systems Engineer
|| Windows XP / Server 2003



David Bélanger wrote:

>On Mon, Feb 21, 2005 at 08:10:17AM -0600, Christopher Hota wrote:
>  
>
>>On my new 12" Aluminum PowerBook, I'm using the following with no 
>>problems (results in spankin-fast binaries, too):
>>
>>CFLAGS="-O2 -pipe -mcpu=7450 -maltivec -mabi=altivec -mpowerpc-gfxopt 
>>-fsigned-char -mstring -mmultiple"
>>CHOST="powerpc-unknown-linux-gnu"
>>CXXFLAGS="${CFLAGS}"
>>MAKEOPTS="-j3"
>>
>>    
>>
>
>Hi,
>
>I'm just wondering if the -mmultiple people actually test if -mmultiple
>increases performance on their CPU... because this enables the use of
>load multiple word from my understanding and this instruction might be
>quite expensive depending on the CPU implementation.
>
>-fsigned-char is the not the default?
>
>
>
>David
>
>---
>
>David Bélanger
>Web page:   http://www.cs.mcgill.ca/~dbelan2/
>Public key: http://www.cs.mcgill.ca/~dbelan2/public_key.txt
>
>
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>[email protected] mailing list
>
>  
>

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