On Tue, 17 Sep 2024, Martin Storsjö wrote:
It turns out that recent versions of MS armasm64 does support some
SVE instructions, but not all of them. Test for one of the
instructions that it currently doesn't support.
---
Just as disclaimer, I'm not currently actively planning on writing
SVE/SVE2 optimizations. However, related projects such as x264 and
dav1d do have a few functions using these extensions, so we might just
as well add the framework support for these features in ffmpeg
anyway, as functions needing this support will come sooner or later
anyway.
In the related projects, there's no really use of longer vectors
(as there's very little such HW available anyway), but SVE gives
widening loads (used in a couple places in x264) and 16 bit dot
products (used in dav1d), which can be useful with 128 bit vectors.
---
configure | 14 +++++++++++++-
ffbuild/arch.mak | 2 ++
libavutil/aarch64/asm.S | 18 ++++++++++++++++++
3 files changed, 33 insertions(+), 1 deletion(-)
Planning on pushing this set later today.
// Martin
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