rust/src/test/run-pass/simd-intrinsic-float-minmax.rs

// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// ignore-emscripten
// min-llvm-version 7.0
// error-pattern: panicked

// Test that the simd_f{min,max} intrinsics produce the correct results.

#![feature(repr_simd, platform_intrinsics)]
#![allow(non_camel_case_types)]

#[repr(simd)]
#[derive(Copy, Clone, PartialEq, Debug)]
struct f32x4(pub f32, pub f32, pub f32, pub f32);

extern "platform-intrinsic" {
    fn simd_fmin<T>(x: T, y: T) -> T;
    fn simd_fmax<T>(x: T, y: T) -> T;
}

fn main() {
    let x = f32x4(1.0, 2.0, 3.0, 4.0);
    let y = f32x4(2.0, 1.0, 4.0, 3.0);
    let nan = ::std::f32::NAN;
    let n = f32x4(nan, nan, nan, nan);

    unsafe {
        let min0 = simd_fmin(x, y);
        let min1 = simd_fmin(y, x);
        assert_eq!(min0, min1);
        let e = f32x4(1.0, 1.0, 3.0, 3.0);
        assert_eq!(min0, e);
        let minn = simd_fmin(x, n);
        assert_eq!(minn, x);
        let minn = simd_fmin(y, n);
        assert_eq!(minn, y);

        let max0 = simd_fmax(x, y);
        let max1 = simd_fmax(y, x);
        assert_eq!(max0, max1);
        let e = f32x4(2.0, 2.0, 4.0, 4.0);
        assert_eq!(max0, e);
        let maxn = simd_fmax(x, n);
        assert_eq!(maxn, x);
        let maxn = simd_fmax(y, n);
        assert_eq!(maxn, y);
    }
}