On May 24, 2006, at 2:54 AM, Etienne Lorrain wrote:
Another calling convention could be to not only return the "return
value"
in %eax (or %edx:%eax for long long returns) but also its
comparisson to
zero in the flags, so that you get:
call foo
jg .Lwarning
jnz .Lerror
And you think this will help? It will at most 1-10 cycles depending
on the processor. And if you have a call in the hot loop, you are
screwed
anyways because you will have to deal with the overhead of the call.
So it will end up being about even.
-- Pinski
