sha2-asm 0.5.4

Assembly implementation of SHA-2 compression functions
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

extern crate cc;

fn main() {
    let target_arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap_or_default();

    let mut build256 = cc::Build::new();
    let (sha256_path, sha512_path) = if target_arch == "x86" {
        ("src/sha256_x86.S", "src/sha512_x86.S")
    } else if target_arch == "x86_64" {
        ("src/sha256_x64.S", "src/sha512_x64.S")
    } else if target_arch == "aarch64" {
        build256.flag("-march=armv8-a+crypto");
        ("src/sha256_aarch64.S", "")
    } else {
        panic!("Unsupported target architecture");
    };
    if target_arch != "aarch64" {
        cc::Build::new()
                  .flag("-c")
                  .file(sha512_path)
                  .compile("libsha512.a");
    }
    build256
              .flag("-c")
              .file(sha256_path)
              .compile("libsha256.a");
}