SHA-accelerated Git

Hi Everyone,

I have a lot of experience with cutting in SHA acceleration. I have no experience with Git.

If someone would setup a fork and provide a call like:

    // https://github.com/torvalds/linux/blob/master/arch/x86/include/asm/cpufeature.h
    // Or whatever the project prefers
    has_x86_sha = cpu_feature_enabled(X86_FEATURE_SHA_NI);

    if (has_x86_sha)
    {
        sha1_hash_block(state, ptr, size);
    }

And provide a stub:

    sha1_hash_block(uint32_t* state, uint8_t* ptr, size_t size)
    {
    }

Then I would be happy to fill in the pieces.

I can also help with ARMv8.

In fact, if you want to use Andy Polyakov's asm from Cryptogams (https://www.openssl.org/~appro/cryptogams/), then I can help with that, too. Andy's skills are renowned and his code is used in the kernel.

Jeff