83 lines
1.8 KiB
Rust
83 lines
1.8 KiB
Rust
// ensures that public symbols are not removed completely
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#![crate_type = "lib"]
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// we can compile to a variety of platforms, because we don't need
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// cross-compiled standard libraries.
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#![feature(no_core, auto_traits)]
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#![no_core]
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#![feature(repr_simd, simd_ffi, link_llvm_intrinsics, lang_items, rustc_attrs)]
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#[derive(Copy)]
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#[repr(simd)]
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pub struct f32x4(f32, f32, f32, f32);
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extern "C" {
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#[link_name = "llvm.sqrt.v4f32"]
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fn vsqrt(x: f32x4) -> f32x4;
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}
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pub fn foo(x: f32x4) -> f32x4 {
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unsafe { vsqrt(x) }
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}
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#[derive(Copy)]
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#[repr(simd)]
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pub struct i32x4(i32, i32, i32, i32);
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extern "C" {
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// _mm_sll_epi32
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#[cfg(any(target_arch = "x86", target_arch = "x86-64"))]
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#[link_name = "llvm.x86.sse2.psll.d"]
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fn integer(a: i32x4, b: i32x4) -> i32x4;
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// vmaxq_s32
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#[cfg(target_arch = "arm")]
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#[link_name = "llvm.arm.neon.vmaxs.v4i32"]
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fn integer(a: i32x4, b: i32x4) -> i32x4;
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// vmaxq_s32
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#[cfg(target_arch = "aarch64")]
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#[link_name = "llvm.aarch64.neon.maxs.v4i32"]
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fn integer(a: i32x4, b: i32x4) -> i32x4;
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// just some substitute foreign symbol, not an LLVM intrinsic; so
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// we still get type checking, but not as detailed as (ab)using
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// LLVM.
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#[cfg(not(any(
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target_arch = "x86",
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target_arch = "x86-64",
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target_arch = "arm",
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target_arch = "aarch64"
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)))]
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fn integer(a: i32x4, b: i32x4) -> i32x4;
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}
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pub fn bar(a: i32x4, b: i32x4) -> i32x4 {
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unsafe { integer(a, b) }
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}
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#[lang = "sized"]
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pub trait Sized {}
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#[lang = "copy"]
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pub trait Copy {}
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impl Copy for f32 {}
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impl Copy for i32 {}
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pub mod marker {
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pub use Copy;
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}
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#[lang = "freeze"]
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auto trait Freeze {}
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#[macro_export]
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#[rustc_builtin_macro]
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macro_rules! Copy {
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() => {};
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}
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#[macro_export]
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#[rustc_builtin_macro]
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macro_rules! derive {
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() => {};
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}
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