[PATCHES] R600/SI: New V_FRACT fix, intrinsic for S_FLBIT_I32, and more

[Matt Arsenault]

On 03/10/2015 03:21 PM, Marek Olšák wrote:
> If we didn't have to deal with fsub, only one pattern would be needed.
> A possible solution is to expand fsub, so that it's translated into
> (v_add_f32 a, -b), and then convert it to v_sub_f32 in the shrinking
> pass if it's possible.
>
> The hardware internally expands (v_sub_f32 a, b) into (v_add_f32 a, -b) anyway.
>
> Marek
When I removed the fsub pseudo, I was originally going to handle it with 
the expanded pattern, but then I noticed the expansion for fsub did the 
same thing anyway and was slightly easier. Another option might be to do 
that