[opus] [Aarch64 00/11] Patches to enable Aarch64

[Jonathan Lennox]

> On Nov 16, 2015, at 4:42 PM, Jonathan Lennox <jonathan at vidyo.com> wrote:
> 
> I haven’t yet tried replacing SIG2WORD16 (or silk_ADD_SAT32/silk_SUB_SAT32) with Neon intrinsics.  That’s an obvious next step.

This doesn’t show any appreciable speed difference in my tests, but the code is obviously better by inspection (all three of these map directly to a single Aarch64 instruction and a single Neon intrinsic) so my code paths may just not exercise them.

Patches follow.