[FFmpeg-devel] [PATCH]v6 Opus Pyramid Vector Quantization Search in x86 SIMD asm

Rostislav Pehlivanov atomnuker at gmail.com
Sat Aug 5 07:23:44 EEST 2017


On 4 August 2017 at 23:58, Ivan Kalvachev <ikalvachev at gmail.com> wrote:

>
> >> I had it mixed before, but I changed it to be consistent.
> >> Some new avx instruction are not overloaded or
> >> available without their "v-" prefix.
> >> e.g. x86util uses vpbroadcastw in SPLATW.
> >
> > Every instruction that has both a legacy encoding and a VEX-encoding
> > will be automatically converted to VEX in AVX functions when written
> > without the v-prefix. There is no legacy encoding for newer
> > instructions so there's no reason for x86inc to overload those.
>
> That's great, but it doesn't address the original problem.
> Do you insist on removing the "v-" prefix from AVX only instructions?
>
>
I insist.


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