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// Copyright 2024 the Fearless_SIMD Authors
// SPDX-License-Identifier: Apache-2.0 OR MIT
#![expect(
missing_docs,
reason = "TODO: https://github.com/linebender/fearless_simd/issues/40"
)]
use fearless_simd::{Level, Simd, SimdBase, WithSimd, dispatch};
// The WithSimd idea is adapted from pulp but is clunky; we
// will probably prefer the `dispatch!` macro.
struct Foo;
impl WithSimd for Foo {
type Output = f32;
#[inline(always)]
fn with_simd<S: Simd>(self, simd: S) -> Self::Output {
let a = simd.splat_f32x4(42.0);
let b = a + a;
b[0]
}
}
#[inline(always)]
fn foo<S: Simd>(simd: S, x: f32) -> f32 {
let n = S::f32s::N;
println!("n = {n}");
simd.splat_f32x4(x).sqrt()[0]
}
// currently requires `safe_wrappers` feature
fn do_something_on_neon(_level: Level) -> f32 {
#[cfg(all(feature = "safe_wrappers", target_arch = "aarch64"))]
if let Some(neon) = _level.as_neon() {
return neon.vectorize(
#[inline(always)]
|| {
let v = neon.neon.vdupq_n_f32(42.0);
neon.neon.vgetq_lane_f32::<0>(v)
},
);
}
0.0
}
fn main() {
let level = Level::new();
let x = level.dispatch(Foo);
let y = dispatch!(level, simd => foo(simd, 42.0));
let z = do_something_on_neon(level);
println!("level = {level:?}, x = {x}, y = {y}, z = {z}");
}
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