add an opt-in cargo feature to build intrinsics from compiler-rt source
closes #63 cc #66
This commit is contained in:
Jorge Aparicio
parent
69e93de9d9
commit
f77ca915c4
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@ -4,6 +4,10 @@ build = "build.rs"
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name = "rustc_builtins"
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version = "0.1.0"
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[build-dependencies]
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gcc = "0.3.35"
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rustc-cfg = "0.1.2"
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[dependencies]
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[dependencies.rlibc]
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@ -17,6 +21,8 @@ gcc_s = { path = "gcc_s" }
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compiler-rt = { path = "compiler-rt" }
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[features]
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# Build the missing intrinsics from compiler-rt C source code
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c = []
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weak = ["rlibc/weak"]
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[workspace]
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426
build.rs
426
build.rs
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@ -1,8 +1,430 @@
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extern crate gcc;
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extern crate rustc_cfg;
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use std::collections::BTreeMap;
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use std::env;
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use std::path::Path;
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use rustc_cfg::Cfg;
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struct Sources {
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// SYMBOL -> PATH TO SOURCE
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map: BTreeMap<&'static str, &'static str>,
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}
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impl Sources {
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fn new() -> Sources {
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Sources { map: BTreeMap::new() }
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}
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fn extend(&mut self, sources: &[&'static str]) {
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// NOTE Some intrinsics have both a generic implementation (e.g.
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// `floatdidf.c`) and an arch optimized implementation
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// (`x86_64/floatdidf.c`). In those cases, we keep the arch optimized
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// implementation and discard the generic implementation. If we don't
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// and keep both implementations, the linker will yell at us about
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// duplicate symbols!
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for &src in sources {
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let symbol = Path::new(src).file_stem().unwrap().to_str().unwrap();
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if src.contains("/") {
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// Arch-optimized implementation (preferred)
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self.map.insert(symbol, src);
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} else {
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// Generic implementation
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if !self.map.contains_key(symbol) {
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self.map.insert(symbol, src);
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}
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}
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}
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}
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fn remove(&mut self, symbols: &[&str]) {
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for symbol in symbols {
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self.map.remove(*symbol).unwrap();
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}
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}
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}
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fn main() {
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if env::var("TARGET").unwrap().ends_with("gnueabihf") {
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println!("cargo:rerun-if-changed=build.rs");
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let target = env::var("TARGET").unwrap();
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let Cfg { ref target_arch, ref target_os, ref target_env, ref target_vendor, .. } =
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Cfg::new(&target).unwrap();
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// NOTE we are going to assume that llvm-target, what determines our codegen option, matches the
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// target triple. This is usually correct for our built-in targets but can break in presence of
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// custom targets, which can have arbitrary names.
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let llvm_target = target.split('-').collect::<Vec<_>>();
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let target_vendor = target_vendor.as_ref().unwrap();
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// Build missing intrinsics from compiler-rt C source code
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if env::var_os("CARGO_FEATURE_C").is_some() {
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let cfg = &mut gcc::Config::new();
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if target_env == "msvc" {
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// Don't pull in extra libraries on MSVC
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cfg.flag("/Zl");
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// Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP
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cfg.define("__func__", Some("__FUNCTION__"));
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} else {
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// Turn off various features of gcc and such, mostly copying
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// compiler-rt's build system already
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cfg.flag("-fno-builtin");
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cfg.flag("-fvisibility=hidden");
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cfg.flag("-fomit-frame-pointer");
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cfg.flag("-ffreestanding");
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}
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// NOTE Most of the ARM intrinsics are written in assembly. Tell gcc which arch we are going to
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// target to make sure that the assembly implementations really work for the target. If the
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// implementation is not valid for the arch, then gcc will error when compiling it.
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if llvm_target[0].starts_with("thumb") {
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cfg.flag("-mthumb");
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if llvm_target.last() == Some(&"eabihf") {
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cfg.flag("-mfloat-abi=hard");
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}
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}
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if llvm_target[0] == "thumbv6m" {
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cfg.flag("-march=armv6-m");
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}
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if llvm_target[0] == "thumbv7m" {
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cfg.flag("-march=armv7-m");
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}
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if llvm_target[0] == "thumbv7em" {
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cfg.flag("-march=armv7e-m");
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}
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let mut sources = Sources::new();
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sources.extend(&["absvdi2.c",
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"absvsi2.c",
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"addvdi3.c",
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"addvsi3.c",
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"apple_versioning.c",
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"clear_cache.c",
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"clzdi2.c",
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"clzsi2.c",
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"cmpdi2.c",
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"comparedf2.c",
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"comparesf2.c",
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"ctzdi2.c",
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"ctzsi2.c",
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"divdc3.c",
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"divdf3.c",
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"divsc3.c",
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"divsf3.c",
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"divxc3.c",
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"extendsfdf2.c",
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"extendhfsf2.c",
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"ffsdi2.c",
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"fixdfdi.c",
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"fixdfsi.c",
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"fixsfdi.c",
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"fixsfsi.c",
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"fixunsdfdi.c",
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"fixunsdfsi.c",
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"fixunssfdi.c",
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"fixunssfsi.c",
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"fixunsxfdi.c",
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"fixunsxfsi.c",
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"fixxfdi.c",
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"floatdidf.c",
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"floatdisf.c",
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"floatdixf.c",
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"floatsidf.c",
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"floatsisf.c",
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"floatundidf.c",
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"floatundisf.c",
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"floatundixf.c",
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"floatunsidf.c",
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"floatunsisf.c",
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"int_util.c",
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"muldc3.c",
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"muldf3.c",
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"muloti4.c",
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"mulsc3.c",
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"mulsf3.c",
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"mulvdi3.c",
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"mulvsi3.c",
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"mulxc3.c",
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"negdf2.c",
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"negdi2.c",
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"negsf2.c",
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"negvdi2.c",
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"negvsi2.c",
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"paritydi2.c",
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"paritysi2.c",
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"popcountdi2.c",
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"popcountsi2.c",
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"powidf2.c",
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"powisf2.c",
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"powixf2.c",
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"subdf3.c",
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"subsf3.c",
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"subvdi3.c",
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"subvsi3.c",
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"truncdfhf2.c",
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"truncdfsf2.c",
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"truncsfhf2.c",
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"ucmpdi2.c"]);
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if target_os != "ios" {
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sources.extend(&["absvti2.c",
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"addtf3.c",
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"addvti3.c",
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"ashlti3.c",
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"ashrti3.c",
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"clzti2.c",
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"cmpti2.c",
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"ctzti2.c",
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"divtf3.c",
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"divti3.c",
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"ffsti2.c",
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"fixdfti.c",
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"fixsfti.c",
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"fixunsdfti.c",
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"fixunssfti.c",
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"fixunsxfti.c",
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"fixxfti.c",
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"floattidf.c",
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"floattisf.c",
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"floattixf.c",
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"floatuntidf.c",
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"floatuntisf.c",
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"floatuntixf.c",
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"lshrti3.c",
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"modti3.c",
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"multf3.c",
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"multi3.c",
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"mulvti3.c",
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"negti2.c",
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"negvti2.c",
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"parityti2.c",
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"popcountti2.c",
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"powitf2.c",
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"subtf3.c",
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"subvti3.c",
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"trampoline_setup.c",
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"ucmpti2.c",
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"udivmodti4.c",
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"udivti3.c",
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"umodti3.c"]);
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}
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if target_vendor == "apple" {
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sources.extend(&["atomic_flag_clear.c",
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"atomic_flag_clear_explicit.c",
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"atomic_flag_test_and_set.c",
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"atomic_flag_test_and_set_explicit.c",
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"atomic_signal_fence.c",
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"atomic_thread_fence.c"]);
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}
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if target_os != "windows" && target_os != "none" {
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sources.extend(&["emutls.c"]);
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}
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if target_env == "msvc" {
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if target_arch == "x86_64" {
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sources.extend(&["x86_64/floatdidf.c", "x86_64/floatdisf.c", "x86_64/floatdixf.c"]);
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}
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} else {
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if target_os != "freebsd" {
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sources.extend(&["gcc_personality_v0.c"]);
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}
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if target_arch == "x86_64" {
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sources.extend(&["x86_64/chkstk.S",
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"x86_64/chkstk2.S",
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"x86_64/floatdidf.c",
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"x86_64/floatdisf.c",
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"x86_64/floatdixf.c",
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"x86_64/floatundidf.S",
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"x86_64/floatundisf.S",
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"x86_64/floatundixf.S"]);
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}
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if target_arch == "x86" {
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sources.extend(&["i386/ashldi3.S",
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"i386/ashrdi3.S",
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"i386/chkstk.S",
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"i386/chkstk2.S",
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"i386/divdi3.S",
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"i386/floatdidf.S",
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"i386/floatdisf.S",
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"i386/floatdixf.S",
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"i386/floatundidf.S",
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"i386/floatundisf.S",
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"i386/floatundixf.S",
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"i386/lshrdi3.S",
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"i386/moddi3.S",
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"i386/muldi3.S",
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"i386/udivdi3.S",
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"i386/umoddi3.S"]);
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}
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}
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if target_arch == "arm" && target_os != "ios" {
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sources.extend(&["arm/aeabi_cdcmp.S",
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"arm/aeabi_cdcmpeq_check_nan.c",
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"arm/aeabi_cfcmp.S",
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"arm/aeabi_cfcmpeq_check_nan.c",
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"arm/aeabi_dcmp.S",
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"arm/aeabi_div0.c",
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"arm/aeabi_drsub.c",
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"arm/aeabi_fcmp.S",
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"arm/aeabi_frsub.c",
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"arm/bswapdi2.S",
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"arm/bswapsi2.S",
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"arm/clzdi2.S",
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"arm/clzsi2.S",
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"arm/comparesf2.S",
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"arm/divmodsi4.S",
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"arm/divsi3.S",
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"arm/modsi3.S",
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"arm/switch16.S",
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"arm/switch32.S",
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"arm/switch8.S",
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"arm/switchu8.S",
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"arm/sync_synchronize.S",
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"arm/udivmodsi4.S",
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"arm/udivsi3.S",
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"arm/umodsi3.S"]);
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}
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if llvm_target[0] == "armv7" {
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sources.extend(&["arm/sync_fetch_and_add_4.S",
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"arm/sync_fetch_and_add_8.S",
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"arm/sync_fetch_and_and_4.S",
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"arm/sync_fetch_and_and_8.S",
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"arm/sync_fetch_and_max_4.S",
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"arm/sync_fetch_and_max_8.S",
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"arm/sync_fetch_and_min_4.S",
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"arm/sync_fetch_and_min_8.S",
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"arm/sync_fetch_and_nand_4.S",
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"arm/sync_fetch_and_nand_8.S",
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"arm/sync_fetch_and_or_4.S",
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"arm/sync_fetch_and_or_8.S",
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"arm/sync_fetch_and_sub_4.S",
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"arm/sync_fetch_and_sub_8.S",
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"arm/sync_fetch_and_umax_4.S",
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"arm/sync_fetch_and_umax_8.S",
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"arm/sync_fetch_and_umin_4.S",
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"arm/sync_fetch_and_umin_8.S",
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"arm/sync_fetch_and_xor_4.S",
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"arm/sync_fetch_and_xor_8.S"]);
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}
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if llvm_target.last().unwrap().ends_with("eabihf") {
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if !llvm_target[0].starts_with("thumbv7em") {
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sources.extend(&["arm/adddf3vfp.S",
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"arm/addsf3vfp.S",
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"arm/divdf3vfp.S",
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"arm/divsf3vfp.S",
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"arm/eqdf2vfp.S",
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"arm/eqsf2vfp.S",
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"arm/extendsfdf2vfp.S",
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"arm/fixdfsivfp.S",
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"arm/fixsfsivfp.S",
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"arm/fixunsdfsivfp.S",
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"arm/fixunssfsivfp.S",
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"arm/floatsidfvfp.S",
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"arm/floatsisfvfp.S",
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"arm/floatunssidfvfp.S",
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"arm/floatunssisfvfp.S",
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"arm/gedf2vfp.S",
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"arm/gesf2vfp.S",
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"arm/gtdf2vfp.S",
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"arm/gtsf2vfp.S",
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"arm/ledf2vfp.S",
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"arm/lesf2vfp.S",
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"arm/ltdf2vfp.S",
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"arm/ltsf2vfp.S",
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"arm/muldf3vfp.S",
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"arm/mulsf3vfp.S",
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"arm/nedf2vfp.S",
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"arm/nesf2vfp.S",
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"arm/restore_vfp_d8_d15_regs.S",
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"arm/save_vfp_d8_d15_regs.S",
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"arm/subdf3vfp.S",
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"arm/subsf3vfp.S"]);
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}
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sources.extend(&["arm/negdf2vfp.S", "arm/negsf2vfp.S"]);
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}
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if target_arch == "aarch64" {
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sources.extend(&["comparetf2.c",
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"extenddftf2.c",
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"extendsftf2.c",
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"fixtfdi.c",
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"fixtfsi.c",
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"fixtfti.c",
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"fixunstfdi.c",
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"fixunstfsi.c",
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"fixunstfti.c",
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"floatditf.c",
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"floatsitf.c",
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"floatunditf.c",
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"floatunsitf.c",
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"multc3.c",
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"trunctfdf2.c",
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"trunctfsf2.c"]);
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}
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// Remove the assembly implementations that won't compile for the target
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if llvm_target[0] == "thumbv6m" {
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sources.remove(&["aeabi_cdcmp",
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"aeabi_cfcmp",
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"aeabi_dcmp",
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"aeabi_fcmp",
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"clzdi2",
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"clzsi2",
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"comparesf2",
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"divmodsi4",
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"divsi3",
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"modsi3",
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"switch16",
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"switch32",
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"switch8",
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"switchu8",
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"udivmodsi4",
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"udivsi3",
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"umodsi3"]);
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// But use some generic implementations where possible
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sources.extend(&["clzdi2.c", "clzsi2.c"])
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}
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if llvm_target[0] == "thumbv7m" || llvm_target[0] == "thumbv7em" {
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sources.remove(&["aeabi_cdcmp", "aeabi_cfcmp"]);
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}
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for src in sources.map.values() {
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cfg.file(Path::new("compiler-rt/lib/builtins").join(src));
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}
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cfg.compile("libcompiler-rt.a");
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}
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// To filter away some flaky test (see src/float/add.rs for details)
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if llvm_target.last() == Some(&"gnueabihf") {
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println!("cargo:rustc-cfg=gnueabihf")
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}
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println!("cargo:rerun-if-changed=build.rs");
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// To compile intrinsics.rs for thumb targets, where there is no libc
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if llvm_target[0].starts_with("thumb") {
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println!("cargo:rustc-cfg=thumb")
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}
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// compiler-rt `cfg`s away some intrinsics for thumbv6m because that target doesn't have full
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// THUMBv2 support. We have to cfg our code accordingly.
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if llvm_target[0] == "thumbv6m" {
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println!("cargo:rustc-cfg=thumbv6m")
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}
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}
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|
|
|||
|
|
@ -68,6 +68,7 @@ pub extern "C" fn __aeabi_fadd(a: f32, b: f32) -> f32 {
|
|||
::float::add::__addsf3(a, b)
|
||||
}
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"), not(thumbv6m))))]
|
||||
#[cfg_attr(not(test), no_mangle)]
|
||||
pub extern "C" fn __aeabi_idiv(a: i32, b: i32) -> i32 {
|
||||
::int::sdiv::__divsi3(a, b)
|
||||
|
|
@ -93,6 +94,7 @@ pub extern "C" fn __aeabi_lmul(a: u64, b: u64) -> u64 {
|
|||
::int::mul::__muldi3(a, b)
|
||||
}
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"), not(thumbv6m))))]
|
||||
#[cfg_attr(not(test), no_mangle)]
|
||||
pub extern "C" fn __aeabi_uidiv(a: u32, b: u32) -> u32 {
|
||||
::int::udiv::__udivsi3(a, b)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,399 @@
|
|||
// By compiling this file we check that all the intrinsics we care about continue to be provided by
|
||||
// the `rustc_builtins` crate regardless of the changes we make to it. If we, by mistake, stop
|
||||
// compiling a C implementation and forget to implement that intrinsic in Rust, this file will fail
|
||||
// to link due to the missing intrinsic (symbol).
|
||||
|
||||
#![allow(unused_features)]
|
||||
#![deny(dead_code)]
|
||||
#![feature(core_float)]
|
||||
#![feature(lang_items)]
|
||||
#![feature(libc)]
|
||||
#![feature(start)]
|
||||
#![no_std]
|
||||
#![cfg_attr(thumb, no_main)]
|
||||
|
||||
#[cfg(not(thumb))]
|
||||
extern crate libc;
|
||||
extern crate rustc_builtins;
|
||||
|
||||
// NOTE cfg(not(thumbv6m)) means that the operation is not supported on ARMv6-M at all. Not even
|
||||
// compiler-rt provides a C/assembly implementation.
|
||||
|
||||
// Every function in this module maps will be lowered to an intrinsic by LLVM, if the platform
|
||||
// doesn't have native support for the operation used in the function. ARM has a naming convention
|
||||
// convention for its intrinsics that's different from other architectures; that's why some function
|
||||
// have an additional comment: the function name is the ARM name for the intrinsic and the comment
|
||||
// in the non-ARM name for the intrinsic.
|
||||
#[cfg(feature = "c")]
|
||||
mod intrinsics {
|
||||
use core::num::Float;
|
||||
|
||||
// trunccdfsf2
|
||||
pub fn aeabi_d2f(x: f64) -> f32 {
|
||||
x as f32
|
||||
}
|
||||
|
||||
// fixdfsi
|
||||
pub fn aeabi_d2i(x: f64) -> i32 {
|
||||
x as i32
|
||||
}
|
||||
|
||||
// fixdfdi
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_d2l(x: f64) -> i64 {
|
||||
x as i64
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_d2l(_: f64) -> i64 {
|
||||
0
|
||||
}
|
||||
|
||||
// fixunsdfsi
|
||||
pub fn aeabi_d2uiz(x: f64) -> u32 {
|
||||
x as u32
|
||||
}
|
||||
|
||||
// fixunsdfdi
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_d2ulz(x: f64) -> u64 {
|
||||
x as u64
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_d2ulz(_: f64) -> u64 {
|
||||
0
|
||||
}
|
||||
|
||||
// adddf3
|
||||
pub fn aeabi_dadd(a: f64, b: f64) -> f64 {
|
||||
a + b
|
||||
}
|
||||
|
||||
// eqdf2
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_dcmpeq(a: f64, b: f64) -> bool {
|
||||
a == b
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_dcmpeq(_: f64, _: f64) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
// gtdf2
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_dcmpgt(a: f64, b: f64) -> bool {
|
||||
a > b
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_dcmpgt(_: f64, _: f64) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
// ltdf2
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_dcmplt(a: f64, b: f64) -> bool {
|
||||
a < b
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_dcmplt(_: f64, _: f64) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
// divdf3
|
||||
pub fn aeabi_ddiv(a: f64, b: f64) -> f64 {
|
||||
a / b
|
||||
}
|
||||
|
||||
// muldf3
|
||||
pub fn aeabi_dmul(a: f64, b: f64) -> f64 {
|
||||
a * b
|
||||
}
|
||||
|
||||
// subdf3
|
||||
pub fn aeabi_dsub(a: f64, b: f64) -> f64 {
|
||||
a - b
|
||||
}
|
||||
|
||||
// extendsfdf2
|
||||
pub fn aeabi_f2d(x: f32) -> f64 {
|
||||
x as f64
|
||||
}
|
||||
|
||||
// fixsfsi
|
||||
pub fn aeabi_f2iz(x: f32) -> i32 {
|
||||
x as i32
|
||||
}
|
||||
|
||||
// fixsfdi
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_f2lz(x: f32) -> i64 {
|
||||
x as i64
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_f2lz(_: f32) -> i64 {
|
||||
0
|
||||
}
|
||||
|
||||
// fixunssfsi
|
||||
pub fn aeabi_f2uiz(x: f32) -> u32 {
|
||||
x as u32
|
||||
}
|
||||
|
||||
// fixunssfdi
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_f2ulz(x: f32) -> u64 {
|
||||
x as u64
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_f2ulz(_: f32) -> u64 {
|
||||
0
|
||||
}
|
||||
|
||||
// addsf3
|
||||
pub fn aeabi_fadd(a: f32, b: f32) -> f32 {
|
||||
a + b
|
||||
}
|
||||
|
||||
// eqsf2
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_fcmpeq(a: f32, b: f32) -> bool {
|
||||
a == b
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_fcmpeq(_: f32, _: f32) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
// gtsf2
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_fcmpgt(a: f32, b: f32) -> bool {
|
||||
a > b
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_fcmpgt(_: f32, _: f32) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
// ltsf2
|
||||
#[cfg(not(thumbv6m))]
|
||||
pub fn aeabi_fcmplt(a: f32, b: f32) -> bool {
|
||||
a < b
|
||||
}
|
||||
|
||||
#[cfg(thumbv6m)]
|
||||
pub fn aeabi_fcmplt(_: f32, _: f32) -> bool {
|
||||
true
|
||||
}
|
||||
|
||||
// divsf3
|
||||
pub fn aeabi_fdiv(a: f32, b: f32) -> f32 {
|
||||
a / b
|
||||
}
|
||||
|
||||
// mulsf3
|
||||
pub fn aeabi_fmul(a: f32, b: f32) -> f32 {
|
||||
a * b
|
||||
}
|
||||
|
||||
// subsf3
|
||||
pub fn aeabi_fsub(a: f32, b: f32) -> f32 {
|
||||
a - b
|
||||
}
|
||||
|
||||
// floatsidf
|
||||
pub fn aeabi_i2d(x: i32) -> f64 {
|
||||
x as f64
|
||||
}
|
||||
|
||||
// floatsisf
|
||||
pub fn aeabi_i2f(x: i32) -> f32 {
|
||||
x as f32
|
||||
}
|
||||
|
||||
pub fn aeabi_idiv(a: i32, b: i32) -> i32 {
|
||||
a.wrapping_div(b)
|
||||
}
|
||||
|
||||
pub fn aeabi_idivmod(a: i32, b: i32) -> i32 {
|
||||
a % b
|
||||
}
|
||||
|
||||
// floatdidf
|
||||
pub fn aeabi_l2d(x: i64) -> f64 {
|
||||
x as f64
|
||||
}
|
||||
|
||||
// floatdisf
|
||||
pub fn aeabi_l2f(x: i64) -> f32 {
|
||||
x as f32
|
||||
}
|
||||
|
||||
// divdi3
|
||||
pub fn aeabi_ldivmod(a: i64, b: i64) -> i64 {
|
||||
a / b
|
||||
}
|
||||
|
||||
// muldi3
|
||||
pub fn aeabi_lmul(a: i64, b: i64) -> i64 {
|
||||
a.wrapping_mul(b)
|
||||
}
|
||||
|
||||
// floatunsidf
|
||||
pub fn aeabi_ui2d(x: u32) -> f64 {
|
||||
x as f64
|
||||
}
|
||||
|
||||
// floatunsisf
|
||||
pub fn aeabi_ui2f(x: u32) -> f32 {
|
||||
x as f32
|
||||
}
|
||||
|
||||
pub fn aeabi_uidiv(a: u32, b: u32) -> u32 {
|
||||
a / b
|
||||
}
|
||||
|
||||
pub fn aeabi_uidivmod(a: u32, b: u32) -> u32 {
|
||||
a % b
|
||||
}
|
||||
|
||||
// floatundidf
|
||||
pub fn aeabi_ul2d(x: u64) -> f64 {
|
||||
x as f64
|
||||
}
|
||||
|
||||
// floatundisf
|
||||
pub fn aeabi_ul2f(x: u64) -> f32 {
|
||||
x as f32
|
||||
}
|
||||
|
||||
// udivdi3
|
||||
pub fn aeabi_uldivmod(a: u64, b: u64) -> u64 {
|
||||
a * b
|
||||
}
|
||||
|
||||
pub fn moddi3(a: i64, b: i64) -> i64 {
|
||||
a % b
|
||||
}
|
||||
|
||||
pub fn mulodi4(a: i64, b: i64) -> i64 {
|
||||
a * b
|
||||
}
|
||||
|
||||
pub fn powidf2(a: f64, b: i32) -> f64 {
|
||||
a.powi(b)
|
||||
}
|
||||
|
||||
pub fn powisf2(a: f32, b: i32) -> f32 {
|
||||
a.powi(b)
|
||||
}
|
||||
|
||||
pub fn umoddi3(a: u64, b: u64) -> u64 {
|
||||
a % b
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(feature = "c")]
|
||||
fn run() {
|
||||
use intrinsics::*;
|
||||
|
||||
aeabi_d2f(2.);
|
||||
aeabi_d2i(2.);
|
||||
aeabi_d2l(2.);
|
||||
aeabi_d2uiz(2.);
|
||||
aeabi_d2ulz(2.);
|
||||
aeabi_dadd(2., 3.);
|
||||
aeabi_dcmpeq(2., 3.);
|
||||
aeabi_dcmpgt(2., 3.);
|
||||
aeabi_dcmplt(2., 3.);
|
||||
aeabi_ddiv(2., 3.);
|
||||
aeabi_dmul(2., 3.);
|
||||
aeabi_dsub(2., 3.);
|
||||
aeabi_f2d(2.);
|
||||
aeabi_f2iz(2.);
|
||||
aeabi_f2lz(2.);
|
||||
aeabi_f2uiz(2.);
|
||||
aeabi_f2ulz(2.);
|
||||
aeabi_fadd(2., 3.);
|
||||
aeabi_fcmpeq(2., 3.);
|
||||
aeabi_fcmpgt(2., 3.);
|
||||
aeabi_fcmplt(2., 3.);
|
||||
aeabi_fdiv(2., 3.);
|
||||
aeabi_fmul(2., 3.);
|
||||
aeabi_fsub(2., 3.);
|
||||
aeabi_i2d(2);
|
||||
aeabi_i2f(2);
|
||||
aeabi_idiv(2, 3);
|
||||
aeabi_idivmod(2, 3);
|
||||
aeabi_l2d(2);
|
||||
aeabi_l2f(2);
|
||||
aeabi_ldivmod(2, 3);
|
||||
aeabi_lmul(2, 3);
|
||||
aeabi_ui2d(2);
|
||||
aeabi_ui2f(2);
|
||||
aeabi_uidiv(2, 3);
|
||||
aeabi_uidivmod(2, 3);
|
||||
aeabi_ul2d(2);
|
||||
aeabi_ul2f(2);
|
||||
aeabi_uldivmod(2, 3);
|
||||
moddi3(2, 3);
|
||||
mulodi4(2, 3);
|
||||
powidf2(2., 3);
|
||||
powisf2(2., 3);
|
||||
umoddi3(2, 3);
|
||||
}
|
||||
|
||||
#[cfg(all(feature = "c", not(thumb)))]
|
||||
#[start]
|
||||
fn main(_: isize, _: *const *const u8) -> isize {
|
||||
run();
|
||||
|
||||
0
|
||||
}
|
||||
|
||||
#[cfg(all(not(feature = "c"), not(thumb)))]
|
||||
#[start]
|
||||
fn main(_: isize, _: *const *const u8) -> isize {
|
||||
0
|
||||
}
|
||||
|
||||
#[cfg(all(feature = "c", thumb))]
|
||||
#[no_mangle]
|
||||
pub fn _start() -> ! {
|
||||
run();
|
||||
loop {}
|
||||
}
|
||||
|
||||
#[cfg(all(not(feature = "c"), thumb))]
|
||||
#[no_mangle]
|
||||
pub fn _start() -> ! {
|
||||
loop {}
|
||||
}
|
||||
|
||||
// ARM targets need these symbols
|
||||
#[no_mangle]
|
||||
pub fn __aeabi_unwind_cpp_pr0() {}
|
||||
|
||||
#[no_mangle]
|
||||
pub fn __aeabi_unwind_cpp_pr1() {}
|
||||
|
||||
// Avoid "undefined reference to `_Unwind_Resume`" errors
|
||||
#[allow(non_snake_case)]
|
||||
#[no_mangle]
|
||||
pub fn _Unwind_Resume() {}
|
||||
|
||||
// Lang items
|
||||
#[cfg(not(test))]
|
||||
#[lang = "eh_personality"]
|
||||
extern "C" fn eh_personality() {}
|
||||
|
||||
#[cfg(not(test))]
|
||||
#[lang = "panic_fmt"]
|
||||
extern "C" fn panic_fmt() {}
|
||||
|
|
@ -286,8 +286,7 @@ mod tests {
|
|||
#[test]
|
||||
fn test_double_different_nan() {
|
||||
let a = f64::from_repr(1);
|
||||
let b = f64::from_repr(
|
||||
0b1111111111110010001000100101010101001000101010000110100011101011);
|
||||
let b = f64::from_repr(0b1111111111110010001000100101010101001000101010000110100011101011);
|
||||
let x = super::__adddf3(a, b);
|
||||
let y = a + b;
|
||||
assert!(x.eq_repr(y));
|
||||
|
|
|
|||
|
|
@ -66,7 +66,9 @@ macro_rules! mulo {
|
|||
}
|
||||
}
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "x86")))]
|
||||
mul!(__muldi3: u64);
|
||||
|
||||
mulo!(__mulosi4: i32);
|
||||
mulo!(__mulodi4: i64);
|
||||
|
||||
|
|
|
|||
|
|
@ -36,18 +36,33 @@ macro_rules! divmod {
|
|||
/// Returns `a / b` and sets `*rem = n % d`
|
||||
#[cfg_attr(not(test), no_mangle)]
|
||||
pub extern "C" fn $intrinsic(a: $ty, b: $ty, rem: &mut $ty) -> $ty {
|
||||
let r = $div(a, b);
|
||||
#[cfg(all(feature = "c", any(target_arch = "x86")))]
|
||||
extern {
|
||||
fn $div(a: $ty, b: $ty) -> $ty;
|
||||
}
|
||||
|
||||
let r = unsafe { $div(a, b) };
|
||||
*rem = a - (r * b);
|
||||
r
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"), not(thumbv6m))))]
|
||||
div!(__divsi3: i32, u32);
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "x86")))]
|
||||
div!(__divdi3: i64, u64);
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"))))]
|
||||
mod_!(__modsi3: i32, u32);
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "x86")))]
|
||||
mod_!(__moddi3: i64, u64);
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"))))]
|
||||
divmod!(__divmodsi4, __divsi3: i32);
|
||||
|
||||
divmod!(__divmoddi4, __divdi3: i64);
|
||||
|
||||
#[cfg(test)]
|
||||
|
|
|
|||
|
|
@ -54,8 +54,13 @@ macro_rules! lshr {
|
|||
}
|
||||
}
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "x86")))]
|
||||
ashl!(__ashldi3: u64);
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "x86")))]
|
||||
ashr!(__ashrdi3: i64);
|
||||
|
||||
#[cfg(not(all(feature = "c", target_arch = "x86")))]
|
||||
lshr!(__lshrdi3: u64);
|
||||
|
||||
#[cfg(test)]
|
||||
|
|
|
|||
|
|
@ -2,6 +2,7 @@ use core::mem;
|
|||
use int::{Int, LargeInt};
|
||||
|
||||
/// Returns `n / d`
|
||||
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"), not(thumbv6m))))]
|
||||
#[cfg_attr(not(test), no_mangle)]
|
||||
pub extern "C" fn __udivsi3(n: u32, d: u32) -> u32 {
|
||||
// Special cases
|
||||
|
|
@ -52,15 +53,27 @@ pub extern "C" fn __udivsi3(n: u32, d: u32) -> u32 {
|
|||
}
|
||||
|
||||
/// Returns `n % d`
|
||||
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"))))]
|
||||
#[cfg_attr(not(test), no_mangle)]
|
||||
pub extern "C" fn __umodsi3(n: u32, d: u32) -> u32 {
|
||||
n - __udivsi3(n, d) * d
|
||||
#[cfg(all(feature = "c", target_arch = "arm", not(target_os = "ios")))]
|
||||
extern "C" {
|
||||
fn __udivsi3(n: u32, d: u32) -> u32;
|
||||
}
|
||||
|
||||
n - unsafe { __udivsi3(n, d) * d }
|
||||
}
|
||||
|
||||
/// Returns `n / d` and sets `*rem = n % d`
|
||||
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"), not(thumbv6m))))]
|
||||
#[cfg_attr(not(test), no_mangle)]
|
||||
pub extern "C" fn __udivmodsi4(n: u32, d: u32, rem: Option<&mut u32>) -> u32 {
|
||||
let q = __udivsi3(n, d);
|
||||
#[cfg(all(feature = "c", target_arch = "arm", not(target_os = "ios")))]
|
||||
extern "C" {
|
||||
fn __udivsi3(n: u32, d: u32) -> u32;
|
||||
}
|
||||
|
||||
let q = unsafe { __udivsi3(n, d) };
|
||||
if let Some(rem) = rem {
|
||||
*rem = n - (q * d);
|
||||
}
|
||||
|
|
@ -69,11 +82,13 @@ pub extern "C" fn __udivmodsi4(n: u32, d: u32, rem: Option<&mut u32>) -> u32 {
|
|||
|
||||
/// Returns `n / d`
|
||||
#[cfg_attr(not(test), no_mangle)]
|
||||
#[cfg(not(all(feature = "c", target_arch = "x86")))]
|
||||
pub extern "C" fn __udivdi3(n: u64, d: u64) -> u64 {
|
||||
__udivmoddi4(n, d, None)
|
||||
}
|
||||
|
||||
/// Returns `n % d`
|
||||
#[cfg(not(all(feature = "c", target_arch = "x86")))]
|
||||
#[cfg_attr(not(test), no_mangle)]
|
||||
pub extern "C" fn __umoddi3(a: u64, b: u64) -> u64 {
|
||||
let mut rem = unsafe { mem::uninitialized() };
|
||||
|
|
|
|||
|
|
@ -10,6 +10,9 @@
|
|||
// We disable #[no_mangle] for tests so that we can verify the test results
|
||||
// against the native compiler-rt implementations of the builtins.
|
||||
|
||||
// NOTE cfg(all(feature = "c", ..)) indicate that compiler-rt provides an arch optimized
|
||||
// implementation of that intrinsic and we'll prefer to use that
|
||||
|
||||
#[cfg(test)]
|
||||
#[macro_use]
|
||||
extern crate quickcheck;
|
||||
|
|
|
|||
|
|
@ -67,4 +67,3 @@ pub unsafe fn ___chkstk() {
|
|||
ret");
|
||||
intrinsics::unreachable();
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,10 +1,12 @@
|
|||
{
|
||||
"arch": "arm",
|
||||
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
|
||||
"executables": true,
|
||||
"features": "+strict-align",
|
||||
"llvm-target": "thumbv6m-none-eabi",
|
||||
"max-atomic-width": 0,
|
||||
"os": "none",
|
||||
"pre-link-args": ["-nostartfiles"],
|
||||
"target-endian": "little",
|
||||
"target-pointer-width": "32"
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,8 +1,10 @@
|
|||
{
|
||||
"arch": "arm",
|
||||
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
|
||||
"executables": true,
|
||||
"llvm-target": "thumbv7em-none-eabi",
|
||||
"os": "none",
|
||||
"pre-link-args": ["-nostartfiles"],
|
||||
"target-endian": "little",
|
||||
"target-pointer-width": "32"
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,9 +1,11 @@
|
|||
{
|
||||
"arch": "arm",
|
||||
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
|
||||
"executables": true,
|
||||
"features": "+vfp4",
|
||||
"llvm-target": "thumbv7em-none-eabihf",
|
||||
"os": "none",
|
||||
"pre-link-args": ["-nostartfiles"],
|
||||
"target-endian": "little",
|
||||
"target-pointer-width": "32"
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,8 +1,10 @@
|
|||
{
|
||||
"arch": "arm",
|
||||
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
|
||||
"executables": true,
|
||||
"llvm-target": "thumbv7m-none-eabi",
|
||||
"os": "none",
|
||||
"pre-link-args": ["-nostartfiles"],
|
||||
"target-endian": "little",
|
||||
"target-pointer-width": "32"
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue