rust/src/test/run-pass/simd-intrinsic-generic-elements.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.

#![feature(repr_simd, platform_intrinsics)]

#[repr(simd)]
#[derive(Copy, Clone, Debug, PartialEq)]
#[allow(non_camel_case_types)]
struct i32x2(i32, i32);
#[repr(simd)]
#[derive(Copy, Clone, Debug, PartialEq)]
#[allow(non_camel_case_types)]
struct i32x3(i32, i32, i32);
#[repr(simd)]
#[derive(Copy, Clone, Debug, PartialEq)]
#[allow(non_camel_case_types)]
struct i32x4(i32, i32, i32, i32);
#[repr(simd)]
#[derive(Copy, Clone, Debug, PartialEq)]
#[allow(non_camel_case_types)]
struct i32x8(i32, i32, i32, i32,
             i32, i32, i32, i32);

extern "platform-intrinsic" {
    fn simd_insert<T, E>(x: T, idx: u32, y: E) -> T;
    fn simd_extract<T, E>(x: T, idx: u32) -> E;

    fn simd_shuffle2<T, U>(x: T, y: T, idx: [u32; 2]) -> U;
    fn simd_shuffle3<T, U>(x: T, y: T, idx: [u32; 3]) -> U;
    fn simd_shuffle4<T, U>(x: T, y: T, idx: [u32; 4]) -> U;
    fn simd_shuffle8<T, U>(x: T, y: T, idx: [u32; 8]) -> U;
}

macro_rules! all_eq {
    ($a: expr, $b: expr) => {{
        let a = $a;
        let b = $b;
        // type inference works better with the concrete type on the
        // left, but humans work better with the expected on the
        // right.
        assert!(b == a,
                "{:?} != {:?}", a, b);
    }}
}

fn main() {
    let x2 = i32x2(20, 21);
    let x3 = i32x3(30, 31, 32);
    let x4 = i32x4(40, 41, 42, 43);
    let x8 = i32x8(80, 81, 82, 83, 84, 85, 86, 87);
    unsafe {
        all_eq!(simd_insert(x2, 0, 100), i32x2(100, 21));
        all_eq!(simd_insert(x2, 1, 100), i32x2(20, 100));

        all_eq!(simd_insert(x3, 0, 100), i32x3(100, 31, 32));
        all_eq!(simd_insert(x3, 1, 100), i32x3(30, 100, 32));
        all_eq!(simd_insert(x3, 2, 100), i32x3(30, 31, 100));

        all_eq!(simd_insert(x4, 0, 100), i32x4(100, 41, 42, 43));
        all_eq!(simd_insert(x4, 1, 100), i32x4(40, 100, 42, 43));
        all_eq!(simd_insert(x4, 2, 100), i32x4(40, 41, 100, 43));
        all_eq!(simd_insert(x4, 3, 100), i32x4(40, 41, 42, 100));

        all_eq!(simd_insert(x8, 0, 100), i32x8(100, 81, 82, 83, 84, 85, 86, 87));
        all_eq!(simd_insert(x8, 1, 100), i32x8(80, 100, 82, 83, 84, 85, 86, 87));
        all_eq!(simd_insert(x8, 2, 100), i32x8(80, 81, 100, 83, 84, 85, 86, 87));
        all_eq!(simd_insert(x8, 3, 100), i32x8(80, 81, 82, 100, 84, 85, 86, 87));
        all_eq!(simd_insert(x8, 4, 100), i32x8(80, 81, 82, 83, 100, 85, 86, 87));
        all_eq!(simd_insert(x8, 5, 100), i32x8(80, 81, 82, 83, 84, 100, 86, 87));
        all_eq!(simd_insert(x8, 6, 100), i32x8(80, 81, 82, 83, 84, 85, 100, 87));
        all_eq!(simd_insert(x8, 7, 100), i32x8(80, 81, 82, 83, 84, 85, 86, 100));

        all_eq!(simd_extract(x2, 0), 20);
        all_eq!(simd_extract(x2, 1), 21);

        all_eq!(simd_extract(x3, 0), 30);
        all_eq!(simd_extract(x3, 1), 31);
        all_eq!(simd_extract(x3, 2), 32);

        all_eq!(simd_extract(x4, 0), 40);
        all_eq!(simd_extract(x4, 1), 41);
        all_eq!(simd_extract(x4, 2), 42);
        all_eq!(simd_extract(x4, 3), 43);

        all_eq!(simd_extract(x8, 0), 80);
        all_eq!(simd_extract(x8, 1), 81);
        all_eq!(simd_extract(x8, 2), 82);
        all_eq!(simd_extract(x8, 3), 83);
        all_eq!(simd_extract(x8, 4), 84);
        all_eq!(simd_extract(x8, 5), 85);
        all_eq!(simd_extract(x8, 6), 86);
        all_eq!(simd_extract(x8, 7), 87);
    }

    let y2 = i32x2(120, 121);
    let y3 = i32x3(130, 131, 132);
    let y4 = i32x4(140, 141, 142, 143);
    let y8 = i32x8(180, 181, 182, 183, 184, 185, 186, 187);
    unsafe {
        all_eq!(simd_shuffle2(x2, y2, [3, 0]), i32x2(121, 20));
        all_eq!(simd_shuffle3(x2, y2, [3, 0, 1]), i32x3(121, 20, 21));
        all_eq!(simd_shuffle4(x2, y2, [3, 0, 1, 2]), i32x4(121, 20, 21, 120));
        all_eq!(simd_shuffle8(x2, y2, [3, 0, 1, 2, 1, 2, 3, 0]),
                i32x8(121, 20, 21, 120, 21, 120, 121, 20));

        all_eq!(simd_shuffle2(x3, y3, [4, 2]), i32x2(131, 32));
        all_eq!(simd_shuffle3(x3, y3, [4, 2, 3]), i32x3(131, 32, 130));
        all_eq!(simd_shuffle4(x3, y3, [4, 2, 3, 0]), i32x4(131, 32, 130, 30));
        all_eq!(simd_shuffle8(x3, y3, [4, 2, 3, 0, 1, 5, 5, 1]),
                i32x8(131, 32, 130, 30, 31, 132, 132, 31));

        all_eq!(simd_shuffle2(x4, y4, [7, 2]), i32x2(143, 42));
        all_eq!(simd_shuffle3(x4, y4, [7, 2, 5]), i32x3(143, 42, 141));
        all_eq!(simd_shuffle4(x4, y4, [7, 2, 5, 0]), i32x4(143, 42, 141, 40));
        all_eq!(simd_shuffle8(x4, y4, [7, 2, 5, 0, 3, 6, 4, 1]),
                i32x8(143, 42, 141, 40, 43, 142, 140, 41));

        all_eq!(simd_shuffle2(x8, y8, [11, 5]), i32x2(183, 85));
        all_eq!(simd_shuffle3(x8, y8, [11, 5, 15]), i32x3(183, 85, 187));
        all_eq!(simd_shuffle4(x8, y8, [11, 5, 15, 0]), i32x4(183, 85, 187, 80));
        all_eq!(simd_shuffle8(x8, y8, [11, 5, 15, 0, 3, 8, 12, 1]),
                i32x8(183, 85, 187, 80, 83, 180, 184, 81));
    }

}