Zig 0.17.0-dev (Split by item)

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ChaChaImpl

chacha20.ChaChaImpl

fn ChaChaImpl(comptime rounds_nb: usize) type

File

lib/std/crypto/chacha20.zig:499

Code

fn ChaChaImpl(comptime rounds_nb: usize) type {
    switch (builtin.cpu.arch) {
        .x86_64 => {
            if (builtin.zig_backend != .stage2_x86_64 and builtin.cpu.has(.x86, .avx512f)) return ChaChaVecImpl(rounds_nb, 4);
            if (builtin.cpu.has(.x86, .avx2)) return ChaChaVecImpl(rounds_nb, 2);
            return ChaChaVecImpl(rounds_nb, 1);
        },
        .aarch64 => {
            if (builtin.zig_backend != .stage2_aarch64 and builtin.cpu.has(.aarch64, .neon)) return ChaChaVecImpl(rounds_nb, 4);
            return ChaChaNonVecImpl(rounds_nb);
        },
        else => return ChaChaNonVecImpl(rounds_nb),
    }
}