Should -msse3 enable fisttp

[Eric Christopher]

>
> Actually it enables more than the builtins.  It enables the use sse3
> instructions.  This is just like -maltivec on PowerPC and -msse and  
> -msse
> on x86, etc.

Right, so the manual disagrees and should probably be fixed.

> And then RTH agreed:
> http://gcc.gnu.org/ml/gcc-patches/2005-03/msg01432.html
>
> So from the sound of it fisttp is not a SSE3 instruction.

Richard's response was that it shouldn't be turned off by -mno-sse3,  
not that it shouldn't be turned on for -msse3. I think it probably  
should be turned on there.

-eric