* Compiler option for SSE4
@ 2010-03-24 6:09 Rayne
2010-03-24 13:10 ` Tim Prince
0 siblings, 1 reply; 2+ messages in thread
From: Rayne @ 2010-03-24 6:09 UTC (permalink / raw)
To: gcc
Hi all,
I'm using GCC 4.1.2 20070626 on a server with Intel Xeon X5570.
How do I turn on the compiler option for SSE4? I've tried -msse4, -msse4.1 and -msse4.2, but they all returned the error message cc1: error: unrecognized command line option "-msse4.1" (for whichever option I tried).
Thank you.
Regards,
Weidong
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Compiler option for SSE4
2010-03-24 6:09 Compiler option for SSE4 Rayne
@ 2010-03-24 13:10 ` Tim Prince
0 siblings, 0 replies; 2+ messages in thread
From: Tim Prince @ 2010-03-24 13:10 UTC (permalink / raw)
To: gcc, gcc-help
On 3/23/2010 11:02 PM, Rayne wrote:
> I'm using GCC 4.1.2 20070626 on a server with Intel Xeon X5570.
>
> How do I turn on the compiler option for SSE4? I've tried -msse4, -msse4.1 and -msse4.2, but they all returned the error message cc1: error: unrecognized command line option "-msse4.1" (for whichever option I tried).
>
You would need a gcc version which supports sse4. As you said yourself,
your version is approaching 3 years old. Actually, the more important
option for Xeon 55xx, if you are vectorizing, is the -mtune=barcelona,
which has been supported for about 2 years. Whether vectorizing or not,
on an 8 core CPU, the OpenMP introduced in gcc 4.2 would be useful.
This looks like a gcc-help mail list question, which is where you should
submit any follow-up.
--
Tim Prince
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2010-03-24 6:09 Compiler option for SSE4 Rayne
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