[Mesa-dev] [PATCH 22/53] intel/fs: Disable SIMD32 dispatch on Gen4-6 with control flow

[Jason Ekstrand]

On May 25, 2018 15:19:25 Matt Turner <mattst88 at gmail.com> wrote:

> On Thu, May 24, 2018 at 2:56 PM, Jason Ekstrand <jason at jlekstrand.net> wrote:
>> From: Francisco Jerez <currojerez at riseup.net>
>>
>> The hardware's control flow logic is 16-wide so we're out of luck
>> here.  We could, in theory, support SIMD32 if we know the control-flow
>> is uniform but we don't have that information at this point.
>
> This is what the "fork" instruction is for on Gen6 :)

Yeah, Curro pointed that out too...