On 5/31/13 10:06 AM, finalpatch wrote:
Just want to share a new way I just discovered to do loop unrolling.
template Unroll(alias CODE, alias N)
{
static if (N == 1)
enum Unroll = format(CODE, 0);
else
enum Unroll = Unroll!(CODE, N-1)~format(CODE, N-1);
}
after that you can write stuff like
mixin(Unroll!("v[%1$d]"~op~"=rhs.v[%1$d];", 3));
and it gets expanded to
v[0]+=rhs.v[0];v[1]+=rhs.v[1];v[2]+=rhs.v[2];
I find this method simpler than with foreach() and a tuple range, and
also faster because it's identical to hand unrolling.
Hehe, first shot is always a trip isn't it. Welcome aboard.
We should have something like that in phobos.
Andrei