Quoting Andrea Pretto <prettz_it@...>:

> The flag -mmmx ( like -msse -m3dnow etc...) activate
> some extensions for C language.
> 
> See this:
>
http://gcc.gnu.org/onlinedocs/gcc-3.3.3/gcc/X86-Built-in-Functions.html#X86%20Built-in%20Functions
> 
> So, those flag activate these built-in functions.

I see. 

But what's the matter with the cmov instruction? Should be reasonably "simple"
for  gcc to use it automatically...  

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