[Mesa-dev] [PATCH 0/8] swr: update rasterizer

[Rowley, Timothy O]

> On Jun 26, 2017, at 7:41 AM, Emil Velikov <emil.l.velikov at gmail.com> wrote:
> On 22 June 2017 at 22:12, Tim Rowley <timothy.o.rowley at intel.com> wrote:
>> Highlights include splitting the heavily templated files into multiple
>> chunks to speed compile (2x for a large machine), and switching the
>> simd intrinsic usage from a macro-based header to a more c++ feeling
>> library.
>> 
> Yay \o/. Out of curiosity - does the simd library bring much more
> apart from a C++ feel?

A couple major intentions, mainly to produce better code for avx512:

* hide the differences in masking operations - avx/avx2 uses a normal ymm register for masking, while avx512 has separate mask registers

* allow reduced vector width operations to be implemented in terms of avx512 code, so that a larger register set and mask registers can be used

> Did you notice the errors in the Travis build [1]? For some reason
> they don't flag up when building locally, although a few C++17
> warnings did pop-up. Speaking for which since we're back to C++11 for
> SWR can we toggle back to GCC 4.8(.1) for Travis?
> 
> Can you guys look at those, please... in case you haven't already.

Sorry, had a patch for this ready to go Friday, but we were working through some other issues and I forgot to send it to the list.  I’ve done so now.