Wilco Dijkstra via Gcc-patches writes:
> Add support for AArch64 LSE and LSE2 to libatomic. Disable outline atomics,
> and use LSE ifuncs for 1-8 byte atomics and LSE2 ifuncs for 16-byte atomics.
> On Neoverse V1, 16-byte atomics are ~4x faster due to avoiding locks.
>
> Note this is safe since w
Add support for AArch64 LSE and LSE2 to libatomic. Disable outline atomics,
and use LSE ifuncs for 1-8 byte atomics and LSE2 ifuncs for 16-byte atomics.
On Neoverse V1, 16-byte atomics are ~4x faster due to avoiding locks.
Note this is safe since we swap all 16-byte atomics using the same ifunc,
