rust/src/test/run-pass/simd/simd-intrinsic-generic-reduction.rs

// run-pass
#![allow(non_camel_case_types)]

// ignore-emscripten
// ignore-aarch64 FIXME: https://github.com/rust-lang/rust/issues/54510

// Test that the simd_reduce_{op} intrinsics produce the correct results.

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

#[repr(simd)]
#[derive(Copy, Clone)]
struct i32x4(pub i32, pub i32, pub i32, pub i32);

#[repr(simd)]
#[derive(Copy, Clone)]
struct u32x4(pub u32, pub u32, pub u32, pub u32);

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

#[repr(simd)]
#[derive(Copy, Clone)]
struct b8x4(pub i8, pub i8, pub i8, pub i8);

#[repr(simd)]
#[derive(Copy, Clone)]
struct b8x16(
    pub i8, pub i8, pub i8, pub i8,
    pub i8, pub i8, pub i8, pub i8,
    pub i8, pub i8, pub i8, pub i8,
    pub i8, pub i8, pub i8, pub i8
);

extern "platform-intrinsic" {
    fn simd_reduce_add_unordered<T, U>(x: T) -> U;
    fn simd_reduce_mul_unordered<T, U>(x: T) -> U;
    fn simd_reduce_add_ordered<T, U>(x: T, acc: U) -> U;
    fn simd_reduce_mul_ordered<T, U>(x: T, acc: U) -> U;
    fn simd_reduce_min<T, U>(x: T) -> U;
    fn simd_reduce_max<T, U>(x: T) -> U;
    fn simd_reduce_min_nanless<T, U>(x: T) -> U;
    fn simd_reduce_max_nanless<T, U>(x: T) -> U;
    fn simd_reduce_and<T, U>(x: T) -> U;
    fn simd_reduce_or<T, U>(x: T) -> U;
    fn simd_reduce_xor<T, U>(x: T) -> U;
    fn simd_reduce_all<T>(x: T) -> bool;
    fn simd_reduce_any<T>(x: T) -> bool;
}

fn main() {
    unsafe {
        let x = i32x4(1, -2, 3, 4);
        let r: i32 = simd_reduce_add_unordered(x);
        assert_eq!(r, 6_i32);
        let r: i32 = simd_reduce_mul_unordered(x);
        assert_eq!(r, -24_i32);
        let r: i32 = simd_reduce_add_ordered(x, -1);
        assert_eq!(r, 5_i32);
        let r: i32 = simd_reduce_mul_ordered(x, -1);
        assert_eq!(r, 24_i32);

        let r: i32 = simd_reduce_min(x);
        assert_eq!(r, -2_i32);
        let r: i32 = simd_reduce_max(x);
        assert_eq!(r, 4_i32);

        let x = i32x4(-1, -1, -1, -1);
        let r: i32 = simd_reduce_and(x);
        assert_eq!(r, -1_i32);
        let r: i32 = simd_reduce_or(x);
        assert_eq!(r, -1_i32);
        let r: i32 = simd_reduce_xor(x);
        assert_eq!(r, 0_i32);

        let x = i32x4(-1, -1, 0, -1);
        let r: i32 = simd_reduce_and(x);
        assert_eq!(r, 0_i32);
        let r: i32 = simd_reduce_or(x);
        assert_eq!(r, -1_i32);
        let r: i32 = simd_reduce_xor(x);
        assert_eq!(r, -1_i32);
    }

    unsafe {
        let x = u32x4(1, 2, 3, 4);
        let r: u32 = simd_reduce_add_unordered(x);
        assert_eq!(r, 10_u32);
        let r: u32 = simd_reduce_mul_unordered(x);
        assert_eq!(r, 24_u32);
        let r: u32 = simd_reduce_add_ordered(x, 1);
        assert_eq!(r, 11_u32);
        let r: u32 = simd_reduce_mul_ordered(x, 2);
        assert_eq!(r, 48_u32);

        let r: u32 = simd_reduce_min(x);
        assert_eq!(r, 1_u32);
        let r: u32 = simd_reduce_max(x);
        assert_eq!(r, 4_u32);

        let t = u32::max_value();
        let x = u32x4(t, t, t, t);
        let r: u32 = simd_reduce_and(x);
        assert_eq!(r, t);
        let r: u32 = simd_reduce_or(x);
        assert_eq!(r, t);
        let r: u32 = simd_reduce_xor(x);
        assert_eq!(r, 0_u32);

        let x = u32x4(t, t, 0, t);
        let r: u32 = simd_reduce_and(x);
        assert_eq!(r, 0_u32);
        let r: u32 = simd_reduce_or(x);
        assert_eq!(r, t);
        let r: u32 = simd_reduce_xor(x);
        assert_eq!(r, t);
    }

    unsafe {
        let x = f32x4(1., -2., 3., 4.);
        let r: f32 = simd_reduce_add_unordered(x);
        assert_eq!(r, 6_f32);
        let r: f32 = simd_reduce_mul_unordered(x);
        assert_eq!(r, -24_f32);
        // FIXME: only works correctly for accumulator, 0:
        // https://bugs.llvm.org/show_bug.cgi?id=36734
        let r: f32 = simd_reduce_add_ordered(x, 0.);
        assert_eq!(r, 6_f32);
        // FIXME: only works correctly for accumulator, 1:
        // https://bugs.llvm.org/show_bug.cgi?id=36734
        let r: f32 = simd_reduce_mul_ordered(x, 1.);
        assert_eq!(r, -24_f32);

        let r: f32 = simd_reduce_min(x);
        assert_eq!(r, -2_f32);
        let r: f32 = simd_reduce_max(x);
        assert_eq!(r, 4_f32);
        let r: f32 = simd_reduce_min_nanless(x);
        assert_eq!(r, -2_f32);
        let r: f32 = simd_reduce_max_nanless(x);
        assert_eq!(r, 4_f32);
    }

    unsafe {
        let x = b8x4(!0, !0, !0, !0);
        let r: bool = simd_reduce_all(x);
        assert_eq!(r, true);
        let r: bool = simd_reduce_any(x);
        assert_eq!(r, true);

        let x = b8x4(!0, !0, 0, !0);
        let r: bool = simd_reduce_all(x);
        assert_eq!(r, false);
        let r: bool = simd_reduce_any(x);
        assert_eq!(r, true);

        let x = b8x4(0, 0, 0, 0);
        let r: bool = simd_reduce_all(x);
        assert_eq!(r, false);
        let r: bool = simd_reduce_any(x);
        assert_eq!(r, false);
    }
}