chacha20/
backends.rs

1#![cfg(any(feature = "cipher", feature = "rng"))]
2
3use cfg_if::cfg_if;
4
5cfg_if! {
6    if #[cfg(chacha20_backend = "soft")] {
7        pub(crate) mod soft;
8    } else if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
9        cfg_if! {
10            if #[cfg(all(chacha20_avx512, chacha20_backend = "avx512"))] {
11                pub(crate) mod avx512;
12                // AVX-2 backend needed for RNG if enabled
13                #[cfg(feature = "rng")]
14                pub(crate) mod avx2;
15            } else if #[cfg(chacha20_backend = "avx2")] {
16                pub(crate) mod avx2;
17            } else if #[cfg(chacha20_backend = "sse2")] {
18                pub(crate) mod sse2;
19            } else {
20                pub(crate) mod soft;
21                #[cfg(chacha20_avx512)]
22                pub(crate) mod avx512;
23                pub(crate) mod avx2;
24                pub(crate) mod sse2;
25            }
26        }
27    } else if #[cfg(all(target_arch = "aarch64", target_feature = "neon"))] {
28        pub(crate) mod neon;
29    } else {
30        pub(crate) mod soft;
31    }
32}
chacha20/backends.rs

chacha20/
backends.rs
