matrixmultiply 0.3.11

General matrix multiplication for f32 and f64 matrices. Operates on matrices with general layout (they can use arbitrary row and column stride). Detects and uses SIMD features on x86/x86-64 and AArch64 transparently for higher performance. Uses a microkernel strategy, so that the implementation is easy to parallelize and optimize. Supports multithreading.
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
28

fn main() {
    // NOTE: from Rust 1.77: `cargo::` syntax. As long as before that is supported we use `cargo:`.

    println!("cargo:rerun-if-changed=build.rs");
    let target_arch = std::env::var("CARGO_CFG_TARGET_ARCH").unwrap_or_default();

    let ac = match autocfg::AutoCfg::new() {
        Ok(ac) => ac,
        Err(err) => {
            println!("cargo:warning={}", err);
            return;
        }
    };

    // Avoid `unexpected_cfgs` lint from 1.80+ toolchains
    if ac.probe_rustc_version(1, 80) {
        println!("cargo:rustc-check-cfg=cfg(has_avx512)");
    }

    if target_arch == "x86" || target_arch == "x86_64" {
        // From 1.89 AVX-512 intrinsics ("avx512f")
        if ac.probe_rustc_version(1, 89)
            && std::env::var_os("CARGO_FEATURE_AVX512").is_some()
        {
            println!("cargo:rustc-cfg=has_avx512");
        }
    }
}