On Sat, Apr 25, 2020 at 7:24 AM Kevin Kofler <kevin.kof...@chello.at> wrote:
> Richard Shaw wrote: > > As far as LCPNet itself I've communicated with the primary developer > quite > > a bit over the last week. LPCNet *will not work* without optimizations > (at > > least not in real time which is the point). > > Has anyone (upstream or elsewhere) ever looked into doing an SSE2 version > of > the vector code? It should be faster than scalar (especially considering > that the "scalar" floating-point code (under the default -mfpmath=sse) > actually loads everything into SSE2 registers as well, but does not > actually > make use of the vectorization) and it would match the baseline of many > distributions and upstreams out there. > Well, I think that would be a bit beyond us ham radio guys, the version we're using is a fork of the main project: https://github.com/mozilla/LPCNet Which only provides AVX, AVX2, and NEON options. I don't think the NEON one is even fast enough (due the the hardware that uses it more than the instruction set). > > I think we're going to work towards a static build option, we just have > to > > figure out the mechanics. The main application does check for AVX/AVX2 > and > > disables the 2020 mode if it's not available. > > Well, if the application does the runtime detection, I guess you can get > away with relying on that. The problems will start if some other > application > comes and wants to use the library unconditionally. > I think the direction we're heading is to include it in the package of the main FreeDV program. This fork is tightly connected to FreeDV/codec2. Planning either a static build or private library. Thanks, Richard
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