115 lines
2.8 KiB
Rust
115 lines
2.8 KiB
Rust
//@ run-pass
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//@ ignore-emscripten
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//@ ignore-android
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// FIXME: this test fails on arm-android because the NDK version 14 is too old.
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// It needs at least version 18. We disable it on all android build bots because
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// there is no way in compile-test to disable it for an (arch,os) pair.
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// Test that the simd floating-point math intrinsics produce correct results.
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#![feature(repr_simd, intrinsics)]
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#![allow(non_camel_case_types)]
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#[repr(simd)]
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#[derive(Copy, Clone, PartialEq, Debug)]
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struct f32x4(pub [f32; 4]);
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extern "rust-intrinsic" {
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fn simd_fsqrt<T>(x: T) -> T;
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fn simd_fabs<T>(x: T) -> T;
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fn simd_fsin<T>(x: T) -> T;
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fn simd_fcos<T>(x: T) -> T;
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fn simd_fexp<T>(x: T) -> T;
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fn simd_fexp2<T>(x: T) -> T;
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fn simd_fma<T>(x: T, y: T, z: T) -> T;
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fn simd_flog<T>(x: T) -> T;
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fn simd_flog10<T>(x: T) -> T;
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fn simd_flog2<T>(x: T) -> T;
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fn simd_fpow<T>(x: T, y: T) -> T;
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fn simd_fpowi<T>(x: T, y: i32) -> T;
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// rounding functions
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fn simd_ceil<T>(x: T) -> T;
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fn simd_floor<T>(x: T) -> T;
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fn simd_round<T>(x: T) -> T;
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fn simd_trunc<T>(x: T) -> T;
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}
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macro_rules! assert_approx_eq_f32 {
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($a:expr, $b:expr) => ({
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let (a, b) = (&$a, &$b);
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assert!((*a - *b).abs() < 1.0e-6,
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"{} is not approximately equal to {}", *a, *b);
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})
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}
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macro_rules! assert_approx_eq {
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($a:expr, $b:expr) => ({
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let a = $a;
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let b = $b;
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assert_approx_eq_f32!(a.0[0], b.0[0]);
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assert_approx_eq_f32!(a.0[1], b.0[1]);
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assert_approx_eq_f32!(a.0[2], b.0[2]);
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assert_approx_eq_f32!(a.0[3], b.0[3]);
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})
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}
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fn main() {
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let x = f32x4([1.0, 1.0, 1.0, 1.0]);
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let y = f32x4([-1.0, -1.0, -1.0, -1.0]);
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let z = f32x4([0.0, 0.0, 0.0, 0.0]);
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let h = f32x4([0.5, 0.5, 0.5, 0.5]);
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unsafe {
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let r = simd_fabs(y);
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assert_approx_eq!(x, r);
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let r = simd_fcos(z);
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assert_approx_eq!(x, r);
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let r = simd_fexp(z);
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assert_approx_eq!(x, r);
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let r = simd_fexp2(z);
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assert_approx_eq!(x, r);
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let r = simd_fma(x, h, h);
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assert_approx_eq!(x, r);
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let r = simd_fsqrt(x);
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assert_approx_eq!(x, r);
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let r = simd_flog(x);
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assert_approx_eq!(z, r);
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let r = simd_flog2(x);
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assert_approx_eq!(z, r);
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let r = simd_flog10(x);
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assert_approx_eq!(z, r);
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let r = simd_fpow(h, x);
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assert_approx_eq!(h, r);
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let r = simd_fpowi(h, 1);
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assert_approx_eq!(h, r);
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let r = simd_fsin(z);
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assert_approx_eq!(z, r);
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// rounding functions
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let r = simd_floor(h);
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assert_eq!(z, r);
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let r = simd_ceil(h);
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assert_eq!(x, r);
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let r = simd_round(h);
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assert_eq!(x, r);
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let r = simd_trunc(h);
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assert_eq!(z, r);
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}
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}
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