2014-08-04 21:25 GMT+02:00 Eric Anholt :
> thomashellan...@gmail.com writes:
>
>> From: Thomas Helland
>>
>> When writing that A || (A && B) patch some
>> days ago I also wrote some other patches
>> that have no impact on my collection of shaders.
>> (shader-db + Some TF2 and Portal-shaders).
>> N
thomashellan...@gmail.com writes:
> From: Thomas Helland
>
> When writing that A || (A && B) patch some
> days ago I also wrote some other patches
> that have no impact on my collection of shaders.
> (shader-db + Some TF2 and Portal-shaders).
> No reduction in instruction count, and no
> signific
Some of these optimizations are pretty obscure and I can't imagine a
real shader hitting them.
What's the cost of checking for these cases? I don't know how expensive
the equals() methods are.
Do we want to litter the optimizer with cases that may never be used in
practice?
-Brian
On 07
So, a little update on these patches.
I've written some shaders for hitting each
specific case in the patch-series.
This shows that:
Patch 1 (X - X) == 0,and
Patch 9 (A - neg(B)) == A + B
have no effect at all.
The rest of the patches do indeed have
a positive effect on the special-case shade
