diff options
Diffstat (limited to 'src/test/ui/simd/intrinsic/generic-cast-pass.rs')
| -rw-r--r-- | src/test/ui/simd/intrinsic/generic-cast-pass.rs | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/test/ui/simd/intrinsic/generic-cast-pass.rs b/src/test/ui/simd/intrinsic/generic-cast-pass.rs new file mode 100644 index 000000000..15f232e2c --- /dev/null +++ b/src/test/ui/simd/intrinsic/generic-cast-pass.rs @@ -0,0 +1,121 @@ +// run-pass +#![allow(unused_must_use)] +// ignore-emscripten FIXME(#45351) hits an LLVM assert + +#![feature(repr_simd, platform_intrinsics, concat_idents, test)] +#![allow(non_camel_case_types)] + +extern crate test; + +#[repr(simd)] +#[derive(PartialEq, Debug)] +struct i32x4(i32, i32, i32, i32); +#[repr(simd)] +#[derive(PartialEq, Debug)] +struct i8x4(i8, i8, i8, i8); + +#[repr(simd)] +#[derive(PartialEq, Debug)] +struct u32x4(u32, u32, u32, u32); +#[repr(simd)] +#[derive(PartialEq, Debug)] +struct u8x4(u8, u8, u8, u8); + +#[repr(simd)] +#[derive(PartialEq, Debug)] +struct f32x4(f32, f32, f32, f32); + +#[repr(simd)] +#[derive(PartialEq, Debug)] +struct f64x4(f64, f64, f64, f64); + + +extern "platform-intrinsic" { + fn simd_cast<T, U>(x: T) -> U; +} + +const A: i32 = -1234567; +const B: i32 = 12345678; +const C: i32 = -123456789; +const D: i32 = 1234567890; + +trait Foo { + fn is_float() -> bool { false } + fn in_range(x: i32) -> bool; +} +impl Foo for i32 { + fn in_range(_: i32) -> bool { true } +} +impl Foo for i8 { + fn in_range(x: i32) -> bool { -128 <= x && x < 128 } +} +impl Foo for u32 { + fn in_range(x: i32) -> bool { 0 <= x } +} +impl Foo for u8 { + fn in_range(x: i32) -> bool { 0 <= x && x < 128 } +} +impl Foo for f32 { + fn is_float() -> bool { true } + fn in_range(_: i32) -> bool { true } +} +impl Foo for f64 { + fn is_float() -> bool { true } + fn in_range(_: i32) -> bool { true } +} + +fn main() { + macro_rules! test { + ($from: ident, $to: ident) => {{ + // force the casts to actually happen, or else LLVM/rustc + // may fold them and get slightly different results. + let (a, b, c, d) = test::black_box((A as $from, B as $from, C as $from, D as $from)); + // the SIMD vectors are all FOOx4, so we can concat_idents + // so we don't have to pass in the extra args to the macro + let mut from = simd_cast(concat_idents!($from, x4)(a, b, c, d)); + let mut to = concat_idents!($to, x4)(a as $to, + b as $to, + c as $to, + d as $to); + // assist type inference, it needs to know what `from` is + // for the `if` statements. + to == from; + + // there are platform differences for some out of range + // casts, so we just normalize such things: it's OK for + // "invalid" calculations to result in nonsense answers. + // (e.g., negative float to unsigned integer goes through a + // library routine on the default i686 platforms, and the + // implementation of that routine differs on e.g., Linux + // vs. macOS, resulting in different answers.) + if $from::is_float() { + if !$to::in_range(A) { from.0 = 0 as $to; to.0 = 0 as $to; } + if !$to::in_range(B) { from.1 = 0 as $to; to.1 = 0 as $to; } + if !$to::in_range(C) { from.2 = 0 as $to; to.2 = 0 as $to; } + if !$to::in_range(D) { from.3 = 0 as $to; to.3 = 0 as $to; } + } + + assert!(to == from, + "{} -> {} ({:?} != {:?})", stringify!($from), stringify!($to), + from, to); + }} + } + macro_rules! tests { + (: $($to: ident),*) => { () }; + // repeating the list twice is easier than writing a cartesian + // product macro + ($from: ident $(, $from_: ident)*: $($to: ident),*) => { + fn $from() { unsafe { $( test!($from, $to); )* } } + tests!($($from_),*: $($to),*) + }; + ($($types: ident),*) => {{ + tests!($($types),* : $($types),*); + $($types();)* + }} + } + + // test various combinations, including truncation, + // signed/unsigned extension, and floating point casts. + tests!(i32, i8, u32, u8, f32); + tests!(i32, u32, f32, f64) +} |