vendor/compiler_builtins/src/lib.rs

   1 #![cfg_attr(feature = "compiler-builtins", compiler_builtins)]
   2 #![cfg_attr(not(feature = "no-asm"), feature(asm))]
   3 #![feature(abi_unadjusted)]
   4 #![cfg_attr(not(feature = "no-asm"), feature(global_asm))]
   5 #![feature(cfg_target_has_atomic)]
   6 #![feature(compiler_builtins)]
   7 #![feature(core_ffi_c)]
   8 #![feature(core_intrinsics)]
   9 #![feature(inline_const)]
  10 #![feature(lang_items)]
  11 #![feature(linkage)]
  12 #![feature(naked_functions)]
  13 #![feature(repr_simd)]
  14 #![no_builtins]
  15 #![no_std]
  16 #![allow(unused_features)]
  17 // We use `u128` in a whole bunch of places which we currently agree with the
  18 // compiler on ABIs and such, so we should be "good enough" for now and changes
  19 // to the `u128` ABI will be reflected here.
  20 #![allow(improper_ctypes, improper_ctypes_definitions)]
  21 // `mem::swap` cannot be used because it may generate references to memcpy in unoptimized code.
  22 #![allow(clippy::manual_swap)]
  23 // Support compiling on both stage0 and stage1 which may differ in supported stable features.
  24 #![allow(stable_features)]
  25
  26 // We disable #[no_mangle] for tests so that we can verify the test results
  27 // against the native compiler-rt implementations of the builtins.
  28
  29 // NOTE cfg(all(feature = "c", ..)) indicate that compiler-rt provides an arch optimized
  30 // implementation of that intrinsic and we'll prefer to use that
  31
  32 // NOTE(aapcs, aeabi, arm) ARM targets use intrinsics named __aeabi_* instead of the intrinsics
  33 // that follow "x86 naming convention" (e.g. addsf3). Those aeabi intrinsics must adhere to the
  34 // AAPCS calling convention (`extern "aapcs"`) because that's how LLVM will call them.
  35
  36 #[cfg(test)]
  37 extern crate core;
  38
  39 #[macro_use]
  40 mod macros;
  41
  42 pub mod float;
  43 pub mod int;
  44
  45 #[cfg(any(
  46     all(target_family = "wasm", target_os = "unknown"),
  47     all(target_arch = "x86_64", target_os = "uefi"),
  48     all(target_arch = "arm", target_os = "none"),
  49     target_os = "xous",
  50     all(target_vendor = "fortanix", target_env = "sgx")
  51 ))]
  52 pub mod math;
  53 pub mod mem;
  54
  55 #[cfg(target_arch = "arm")]
  56 pub mod arm;
  57
  58 #[cfg(all(
  59     kernel_user_helpers,
  60     any(target_os = "linux", target_os = "android"),
  61     target_arch = "arm"
  62 ))]
  63 pub mod arm_linux;
  64
  65 #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
  66 pub mod riscv;
  67
  68 #[cfg(target_arch = "x86")]
  69 pub mod x86;
  70
  71 #[cfg(target_arch = "x86_64")]
  72 pub mod x86_64;
  73
  74 pub mod probestack;