[i386] Replace builtins with vector extensions

[Kirill Yukhin]

Hello folks,
On 09 Oct 14:57, Uros Bizjak wrote:
> On Thu, Oct 9, 2014 at 2:28 PM, Marc Glisse <marc.glisse@inria.fr> wrote:
> > On Thu, 9 Oct 2014, Uros Bizjak wrote:
> OK, let's go in the proposed way, more detailed:
> 
> - we begin with +-*/ of float/double vectors. IMO, this would result
> in a relatively small and easily reviewable patch to iron out the
> details of the approach. Alternatively, we can begin with floats only.
> - commit the patch and wait for the sky to fall down.
> - we play a bit with the compiler to check generated code and corner
> cases (some kind of Q/A) and wait if someone finds a problem (say, a
> couple of weeks).
> - if there are no problems, continue with integer builtins following
> the established approach, otherwise we revert everything and go back
> to the drawing board.
> - repeat the procedure for other builtins.
> 
> I propose to wait a couple of days for possible comments before we get
> the ball rolling.
Let me repeat, I think this is good idea to do.
I just wanted to kindly ask you wait for about 1-2ww before checking-in
this things.
I hope in that time AVX-512VL,BW,DQ will hit trunk completely 
and *lots* more intrinsics will be added (I think intrinsics is
subject of ~[85/n] patch).

--
Thanks, K

> 
> Uros.