Re: [Gnu-arch-users] hackerlab str_ functions performance

[Yann Droneaud]

Florian Weimer <address@hidden> writes:

> * Yann Droneaud:
>
>> Just checkout :
>> /usr/include/bits/string.h
>>
>> There are some assembler function here at least on i386 (for other
>> architecture i'm not sure). 
>
> Recent GCC versions don't use these inline functions.
>

In fact, i previously tought inlined assembler functions were included
if __OPTIMIZE__ is defined (gcc -O2 define it), but as stated in the end
of /usr/include/string.h:

"
     These optimizations are not used unless the symbol
        __USE_STRING_INLINES
"

So /usr/include/bits/string.h content is rarely used,
but /usr/include/bits/string2.h is use.

Andrew Suffield was right.

-- 
Yann Droneaud (aka Meuh) <address@hidden>
http://meuh.org/ | http://sherkan.tuxfamily.net/~meuh/
Une vache perdue sur Internet | A cow lost in the Internet
1024D/BEA43321   5D91 B5B0 5137 B8FE 6882  FE19 CAA0 6F05 BEA4 3321