Re: [PATCH] [2.4] [2.5] [i386] Add support for GCC 3.1 -march=pentium{-mmx,3,4}

J.A. Magallon
2002-05-26T00:09:02Z

On 2002.05.26 Ruth Ivimey-Cook wrote:
>On Sun, 26 May 2002, Luigi Genoni wrote:
>>On Sun, 26 May 2002, Dave Jones wrote:
>>> On Sun, May 26, 2002 at 01:37:39AM +0200, J.A. Magallon wrote:
>>> > Could you also split
>>> > Pentium-Pro/Celeron/Pentium-II CONFIG_M686
>>> > into
>>> > Pentium-Pro CONFIG_M686
>>> > Pentium-II/Celeron CONFIG_MPENTIUMII
>>> There are also a few extra Athlon targets iirc. athlon-xp and the like,
>>> which I'm not sure the purpose of. Some gcc know-all want to clue me in
>>> to what these offer over -march=athlon ?
>>>
>>I do not know about the gcc options, but Athlon XP/MP has sse instruction,
>>while tbird has not, so it could be relate to this.
>>

Problem is that CPU selection is not based on cpu itself, but in options
offered by previous gcc compilers.

I think that the menu should contain separate config options for each
processor type, so it is easily modifiable for specific optimizations
offered by new compilers (for example, gcc-3.1 splitting i686 in
pentium-pro, p2, p3 and p4), or some braindead hacker can optimize
code snippets for some kind of processor.

--
J.A. Magallon # Let the source be with you...
mailto:jamagallon@able.es
Mandrake Linux release 8.3 (Cooker) for i586
Linux werewolf 2.4.18 #1 SMP sáb may 25 14:44:46 CEST 2002 i686