[Liboil] Is liboil still alive?
thiagogalesi at gmail.com
Fri Feb 20 11:22:07 PST 2009
> We were hoping that liboil would obviate the need for us to muck in
> assembly. :-)
> I do see *some* assembly in liboil/*/*copy*.c. Does anyone know if any of
> these have non-temporal copies? There's no real comments to explain, and I
> have no idea what the assembly for non-temporal copies looks like...
Nowadays assembly is not needed as much since the invention of
intrinsics (that's the _mm_store_si128 kind of thing), it's like a C
function, but 'lighter'
Non-temporal ops have NT in their name, like movntq
By the way here's a gcc example of non-temporal ops
/* Stores the data in A to the address P without polluting the caches. */
static __inline void __attribute__((__always_inline__))
_mm_stream_pi (__m64 *__P, __m64 __A)
__builtin_ia32_movntq ((unsigned long long *)__P, (unsigned long long)__A);
(this is in include/xmmintrin.h)
You can find these in GCCs manual and includes
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