Comment by wyldfire

12 hours ago

Does Rust provide architecture-specific intrinsics like C/C++ toolchains usually do? That's a popular way to do SIMD.

3 comments

wyldfire

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steveklabnik  11 hours ago

Yes https://doc.rust-lang.org/stable/std/arch/

  • m-hilgendorf  8 hours ago

    People should be aware though that without `-C target_feature=+<feature>` in your rustc flags the compiler may emit function calls to stubs for the intrinsic. So people should make sure they're passing the appropriate target features, especially when benchmarking.

    [0] https://godbolt.org/z/85nx44zcE

    edited: I tested gcc/clang and they just straight up fail to compile without -msse3. The generated code without optimizations is also pretty bonkers!