Re: PPC cflags
David Bélanger <[email protected]>
| Newsgroups | gmane.linux.gentoo.ppc |
|---|---|
| Message-ID | <[email protected]> |
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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