Am Donnerstag, den 11.11.2010, 21:08 -0500 schrieb John Fine:
> Probably de-inlining your cold block requires the extra function you
> added. If speed is more important you would want that function to have
> the cold attribute so the branch would be predicted correctly and so
> that the call to the extra function wouldn't pollute the L1 cache.
Well, thats what I do now, g++ generates much better asm.
CMove::CMove(const char* packet, unsigned size):
packetStruct(reinterpret_cast<const SMove*>(packet))
{
if(size != sizeof(SMove))
{
CException::Throw(WRONG_SIZE,"Packet size..");
}
}
with CException::Throw with
__attribute__ (( noinline , cold , noreturn)) and
CMove::CMove is marked as "inline"
But I am just wonder why g++ doesn't have a "throw" as a "cold-path".
Because the asm it generates looks like a "hot-path".
Anyways problem solved, thanks for the help.
Luca BÃla Palkovics
