Compiler option for SSE4

Compiler option for SSE4

[Rayne]

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


      

Re: Compiler option for SSE4

[Tim Prince]

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