A simple logarithmic number system

Logarithmic number systems can aid in CPU pipelining, speed up multiply/divide heavy numerical calculations, and mildly increase precision (greatly for some scenarios). This particular library currently only provides a non-vectorized 16-bit implementation, which isn't particularly applicable to any of those scenarios.

Choose your favorite method for vendoring this code into your repository. I think git-subrepo strikes a nicer balance than git-submodules or most other alternatives.

When Zig gets is own builtin package manager we'll be available there as well.

git subrepo clone git+https://github.com/hmusgrave/lns.git [optional-subdir]

const l16 = @import("lns.zig").l16;

test "something" {
    // 7 decimal bits in the i15 fixed-point log representation
    const l16_7 = l16(7);

    const one = l16_7.from(1.0);
    const two = one.add(one);
    const pi = l16_7.from(@as(f32, 3.14159));

    try expect(pi.eql(two.mul(l16_7.from(1.570795))));
}

Contributions welcome. I'll check back on this repo at least once per month. Currently targets Zig 0.10.*-dev.