On Mon, Jun 3, 2019 at 5:31 AM Niels Möller nisse@lysator.liu.se wrote:

Jeffrey Walton noloader@gmail.com writes:

...

Does SHA-1 switch to hardware acceleration for x86 and ARMv8 automatically? Or is a different call required?

If Nettle is configured with --enable-fat, choice of assembly routines is done at runtime. Otherwise, it's a compile-time choice.

Regarding sha1, development version (to be nettle-3.5) can use sha_ni instructions on x86_64, for both sha1 and sha256.

There isn't yet any assembly code for ARMv8.

Thanks Niels.

Are there any plans for ARMv8?

The reason I ask is, I want to recommend Nettle for a project. The two biggest use cases are x86 and ARM (both 32-bit and 64-bit flavors). Candidate libraries should have support for Intel and ARM acceleration.

If ARMv8 is several months away then Nettle is a candidate. If there are no plans then other libraries should be evaluated.

Jeff

On Mon, Jun 3, 2019 at 8:21 AM Niels Möller nisse@lysator.liu.se wrote:

Jeffrey Walton noloader@gmail.com writes:

...

Are there any plans for ARMv8?

I'm not planning to work on that soon, and I don't have any convenient access to ARMv8 hardware. Contributions welcome.

Sorry, I have not acquired a taste for the m4 programming.

You cn access Aarch64 hardware on the GCC Compile Farm. GCC117 and GCC118 are Aarch64 with crypto extensions.

Jeff