128 lines
3.4 KiB
Rust
128 lines
3.4 KiB
Rust
#![cfg_attr(not(stage0), deny(warnings))]
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#![cfg_attr(not(test), no_std)]
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#![cfg_attr(feature = "compiler-builtins", compiler_builtins)]
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#![crate_name = "compiler_builtins"]
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#![crate_type = "rlib"]
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#![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk.png",
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html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
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html_root_url = "https://doc.rust-lang.org/nightly/",
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html_playground_url = "https://play.rust-lang.org/",
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test(attr(deny(warnings))))]
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#![feature(asm)]
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#![feature(compiler_builtins)]
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#![feature(core_intrinsics)]
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#![feature(naked_functions)]
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#![feature(staged_api)]
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#![feature(i128_type)]
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#![feature(repr_simd)]
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#![feature(abi_unadjusted)]
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#![allow(unused_features)]
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#![no_builtins]
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#![unstable(feature = "compiler_builtins_lib",
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reason = "Compiler builtins. Will never become stable.",
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issue = "0")]
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// We disable #[no_mangle] for tests so that we can verify the test results
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// against the native compiler-rt implementations of the builtins.
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// NOTE cfg(all(feature = "c", ..)) indicate that compiler-rt provides an arch optimized
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// implementation of that intrinsic and we'll prefer to use that
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// NOTE(aapcs, aeabi, arm) ARM targets use intrinsics named __aeabi_* instead of the intrinsics
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// that follow "x86 naming convention" (e.g. addsf3). Those aeabi intrinsics must adhere to the
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// AAPCS calling convention (`extern "aapcs"`) because that's how LLVM will call them.
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// TODO(rust-lang/rust#37029) use e.g. checked_div(_).unwrap_or_else(|| abort())
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macro_rules! udiv {
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($a:expr, $b:expr) => {
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unsafe {
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let a = $a;
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let b = $b;
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if b == 0 {
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::core::intrinsics::abort()
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} else {
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::core::intrinsics::unchecked_div(a, b)
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}
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}
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}
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}
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macro_rules! sdiv {
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($sty:ident, $a:expr, $b:expr) => {
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unsafe {
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let a = $a;
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let b = $b;
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if b == 0 || (b == -1 && a == $sty::min_value()) {
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::core::intrinsics::abort()
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} else {
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::core::intrinsics::unchecked_div(a, b)
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}
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}
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}
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}
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macro_rules! urem {
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($a:expr, $b:expr) => {
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unsafe {
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let a = $a;
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let b = $b;
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if b == 0 {
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::core::intrinsics::abort()
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} else {
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::core::intrinsics::unchecked_rem(a, b)
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}
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}
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}
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}
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macro_rules! srem {
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($sty:ty, $a:expr, $b:expr) => {
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unsafe {
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let a = $a;
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let b = $b;
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if b == 0 || (b == -1 && a == $sty::min_value()) {
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::core::intrinsics::abort()
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} else {
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::core::intrinsics::unchecked_rem(a, b)
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}
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}
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}
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}
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// Hack for LLVM expectations for ABI on windows
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#[cfg(all(windows, target_pointer_width="64"))]
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#[repr(simd)]
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pub struct U64x2(u64, u64);
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#[cfg(all(windows, target_pointer_width="64"))]
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fn conv(i: u128) -> U64x2 {
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use int::LargeInt;
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U64x2(i.low(), i.high())
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}
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#[cfg(all(windows, target_pointer_width="64"))]
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fn sconv(i: i128) -> U64x2 {
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use int::LargeInt;
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let j = i as u128;
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U64x2(j.low(), j.high())
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}
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#[cfg(test)]
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extern crate core;
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pub mod int;
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pub mod float;
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#[cfg(feature = "mem")]
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pub mod mem;
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#[cfg(target_arch = "arm")]
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pub mod arm;
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#[cfg(target_arch = "x86_64")]
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pub mod x86_64;
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