rustsimdrust-cargo

Rust-SIMD hello world

I couldn't find a working example for Rust-SIMD. The closest I can find is this one. After adjusting, it becomes:

#![feature(core)]
#![feature(portable_simd)]

use std::simd::f32x4;

fn main() {
    let x = f32x4(1.0, 1.0, 1.0, 1.0);
}

But still cargo complains

error[E0423]: expected function, found type alias `f32x4`
 --> src/main.rs:7:13
  |
7 |     let x = f32x4(1.0, 1.0, 1.0, 1.0);
  |             ^^^^^
  |
  = note: can't use a type alias as a constructor

during building.

How do I get this simple example working?

Cargo.toml:

[package]
name = "rust-simd"
version = "0.1.0"
edition = "2021"

[dependencies]

I have nightly switched on already: rustup default nightly.

Solution

  • The way to construct a SIMD vector with std::simd is type::from(array), for example f32x4::from([1.0, 1.0, 1.0, 1.0]). This is mentioned in the documentation.