add an opt-in cargo feature to build intrinsics from compiler-rt source

closes #63
cc #66
This commit is contained in:
Jorge Aparicio 2016-09-26 15:55:11 -05:00
parent 69e93de9d9
commit f77ca915c4
15 changed files with 883 additions and 8 deletions

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@ -4,6 +4,10 @@ build = "build.rs"
name = "rustc_builtins" name = "rustc_builtins"
version = "0.1.0" version = "0.1.0"
[build-dependencies]
gcc = "0.3.35"
rustc-cfg = "0.1.2"
[dependencies] [dependencies]
[dependencies.rlibc] [dependencies.rlibc]
@ -17,6 +21,8 @@ gcc_s = { path = "gcc_s" }
compiler-rt = { path = "compiler-rt" } compiler-rt = { path = "compiler-rt" }
[features] [features]
# Build the missing intrinsics from compiler-rt C source code
c = []
weak = ["rlibc/weak"] weak = ["rlibc/weak"]
[workspace] [workspace]

426
build.rs
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@ -1,8 +1,430 @@
extern crate gcc;
extern crate rustc_cfg;
use std::collections::BTreeMap;
use std::env; use std::env;
use std::path::Path;
use rustc_cfg::Cfg;
struct Sources {
// SYMBOL -> PATH TO SOURCE
map: BTreeMap<&'static str, &'static str>,
}
impl Sources {
fn new() -> Sources {
Sources { map: BTreeMap::new() }
}
fn extend(&mut self, sources: &[&'static str]) {
// NOTE Some intrinsics have both a generic implementation (e.g.
// `floatdidf.c`) and an arch optimized implementation
// (`x86_64/floatdidf.c`). In those cases, we keep the arch optimized
// implementation and discard the generic implementation. If we don't
// and keep both implementations, the linker will yell at us about
// duplicate symbols!
for &src in sources {
let symbol = Path::new(src).file_stem().unwrap().to_str().unwrap();
if src.contains("/") {
// Arch-optimized implementation (preferred)
self.map.insert(symbol, src);
} else {
// Generic implementation
if !self.map.contains_key(symbol) {
self.map.insert(symbol, src);
}
}
}
}
fn remove(&mut self, symbols: &[&str]) {
for symbol in symbols {
self.map.remove(*symbol).unwrap();
}
}
}
fn main() { fn main() {
if env::var("TARGET").unwrap().ends_with("gnueabihf") { println!("cargo:rerun-if-changed=build.rs");
let target = env::var("TARGET").unwrap();
let Cfg { ref target_arch, ref target_os, ref target_env, ref target_vendor, .. } =
Cfg::new(&target).unwrap();
// NOTE we are going to assume that llvm-target, what determines our codegen option, matches the
// target triple. This is usually correct for our built-in targets but can break in presence of
// custom targets, which can have arbitrary names.
let llvm_target = target.split('-').collect::<Vec<_>>();
let target_vendor = target_vendor.as_ref().unwrap();
// Build missing intrinsics from compiler-rt C source code
if env::var_os("CARGO_FEATURE_C").is_some() {
let cfg = &mut gcc::Config::new();
if target_env == "msvc" {
// Don't pull in extra libraries on MSVC
cfg.flag("/Zl");
// Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP
cfg.define("__func__", Some("__FUNCTION__"));
} else {
// Turn off various features of gcc and such, mostly copying
// compiler-rt's build system already
cfg.flag("-fno-builtin");
cfg.flag("-fvisibility=hidden");
cfg.flag("-fomit-frame-pointer");
cfg.flag("-ffreestanding");
}
// NOTE Most of the ARM intrinsics are written in assembly. Tell gcc which arch we are going to
// target to make sure that the assembly implementations really work for the target. If the
// implementation is not valid for the arch, then gcc will error when compiling it.
if llvm_target[0].starts_with("thumb") {
cfg.flag("-mthumb");
if llvm_target.last() == Some(&"eabihf") {
cfg.flag("-mfloat-abi=hard");
}
}
if llvm_target[0] == "thumbv6m" {
cfg.flag("-march=armv6-m");
}
if llvm_target[0] == "thumbv7m" {
cfg.flag("-march=armv7-m");
}
if llvm_target[0] == "thumbv7em" {
cfg.flag("-march=armv7e-m");
}
let mut sources = Sources::new();
sources.extend(&["absvdi2.c",
"absvsi2.c",
"addvdi3.c",
"addvsi3.c",
"apple_versioning.c",
"clear_cache.c",
"clzdi2.c",
"clzsi2.c",
"cmpdi2.c",
"comparedf2.c",
"comparesf2.c",
"ctzdi2.c",
"ctzsi2.c",
"divdc3.c",
"divdf3.c",
"divsc3.c",
"divsf3.c",
"divxc3.c",
"extendsfdf2.c",
"extendhfsf2.c",
"ffsdi2.c",
"fixdfdi.c",
"fixdfsi.c",
"fixsfdi.c",
"fixsfsi.c",
"fixunsdfdi.c",
"fixunsdfsi.c",
"fixunssfdi.c",
"fixunssfsi.c",
"fixunsxfdi.c",
"fixunsxfsi.c",
"fixxfdi.c",
"floatdidf.c",
"floatdisf.c",
"floatdixf.c",
"floatsidf.c",
"floatsisf.c",
"floatundidf.c",
"floatundisf.c",
"floatundixf.c",
"floatunsidf.c",
"floatunsisf.c",
"int_util.c",
"muldc3.c",
"muldf3.c",
"muloti4.c",
"mulsc3.c",
"mulsf3.c",
"mulvdi3.c",
"mulvsi3.c",
"mulxc3.c",
"negdf2.c",
"negdi2.c",
"negsf2.c",
"negvdi2.c",
"negvsi2.c",
"paritydi2.c",
"paritysi2.c",
"popcountdi2.c",
"popcountsi2.c",
"powidf2.c",
"powisf2.c",
"powixf2.c",
"subdf3.c",
"subsf3.c",
"subvdi3.c",
"subvsi3.c",
"truncdfhf2.c",
"truncdfsf2.c",
"truncsfhf2.c",
"ucmpdi2.c"]);
if target_os != "ios" {
sources.extend(&["absvti2.c",
"addtf3.c",
"addvti3.c",
"ashlti3.c",
"ashrti3.c",
"clzti2.c",
"cmpti2.c",
"ctzti2.c",
"divtf3.c",
"divti3.c",
"ffsti2.c",
"fixdfti.c",
"fixsfti.c",
"fixunsdfti.c",
"fixunssfti.c",
"fixunsxfti.c",
"fixxfti.c",
"floattidf.c",
"floattisf.c",
"floattixf.c",
"floatuntidf.c",
"floatuntisf.c",
"floatuntixf.c",
"lshrti3.c",
"modti3.c",
"multf3.c",
"multi3.c",
"mulvti3.c",
"negti2.c",
"negvti2.c",
"parityti2.c",
"popcountti2.c",
"powitf2.c",
"subtf3.c",
"subvti3.c",
"trampoline_setup.c",
"ucmpti2.c",
"udivmodti4.c",
"udivti3.c",
"umodti3.c"]);
}
if target_vendor == "apple" {
sources.extend(&["atomic_flag_clear.c",
"atomic_flag_clear_explicit.c",
"atomic_flag_test_and_set.c",
"atomic_flag_test_and_set_explicit.c",
"atomic_signal_fence.c",
"atomic_thread_fence.c"]);
}
if target_os != "windows" && target_os != "none" {
sources.extend(&["emutls.c"]);
}
if target_env == "msvc" {
if target_arch == "x86_64" {
sources.extend(&["x86_64/floatdidf.c", "x86_64/floatdisf.c", "x86_64/floatdixf.c"]);
}
} else {
if target_os != "freebsd" {
sources.extend(&["gcc_personality_v0.c"]);
}
if target_arch == "x86_64" {
sources.extend(&["x86_64/chkstk.S",
"x86_64/chkstk2.S",
"x86_64/floatdidf.c",
"x86_64/floatdisf.c",
"x86_64/floatdixf.c",
"x86_64/floatundidf.S",
"x86_64/floatundisf.S",
"x86_64/floatundixf.S"]);
}
if target_arch == "x86" {
sources.extend(&["i386/ashldi3.S",
"i386/ashrdi3.S",
"i386/chkstk.S",
"i386/chkstk2.S",
"i386/divdi3.S",
"i386/floatdidf.S",
"i386/floatdisf.S",
"i386/floatdixf.S",
"i386/floatundidf.S",
"i386/floatundisf.S",
"i386/floatundixf.S",
"i386/lshrdi3.S",
"i386/moddi3.S",
"i386/muldi3.S",
"i386/udivdi3.S",
"i386/umoddi3.S"]);
}
}
if target_arch == "arm" && target_os != "ios" {
sources.extend(&["arm/aeabi_cdcmp.S",
"arm/aeabi_cdcmpeq_check_nan.c",
"arm/aeabi_cfcmp.S",
"arm/aeabi_cfcmpeq_check_nan.c",
"arm/aeabi_dcmp.S",
"arm/aeabi_div0.c",
"arm/aeabi_drsub.c",
"arm/aeabi_fcmp.S",
"arm/aeabi_frsub.c",
"arm/bswapdi2.S",
"arm/bswapsi2.S",
"arm/clzdi2.S",
"arm/clzsi2.S",
"arm/comparesf2.S",
"arm/divmodsi4.S",
"arm/divsi3.S",
"arm/modsi3.S",
"arm/switch16.S",
"arm/switch32.S",
"arm/switch8.S",
"arm/switchu8.S",
"arm/sync_synchronize.S",
"arm/udivmodsi4.S",
"arm/udivsi3.S",
"arm/umodsi3.S"]);
}
if llvm_target[0] == "armv7" {
sources.extend(&["arm/sync_fetch_and_add_4.S",
"arm/sync_fetch_and_add_8.S",
"arm/sync_fetch_and_and_4.S",
"arm/sync_fetch_and_and_8.S",
"arm/sync_fetch_and_max_4.S",
"arm/sync_fetch_and_max_8.S",
"arm/sync_fetch_and_min_4.S",
"arm/sync_fetch_and_min_8.S",
"arm/sync_fetch_and_nand_4.S",
"arm/sync_fetch_and_nand_8.S",
"arm/sync_fetch_and_or_4.S",
"arm/sync_fetch_and_or_8.S",
"arm/sync_fetch_and_sub_4.S",
"arm/sync_fetch_and_sub_8.S",
"arm/sync_fetch_and_umax_4.S",
"arm/sync_fetch_and_umax_8.S",
"arm/sync_fetch_and_umin_4.S",
"arm/sync_fetch_and_umin_8.S",
"arm/sync_fetch_and_xor_4.S",
"arm/sync_fetch_and_xor_8.S"]);
}
if llvm_target.last().unwrap().ends_with("eabihf") {
if !llvm_target[0].starts_with("thumbv7em") {
sources.extend(&["arm/adddf3vfp.S",
"arm/addsf3vfp.S",
"arm/divdf3vfp.S",
"arm/divsf3vfp.S",
"arm/eqdf2vfp.S",
"arm/eqsf2vfp.S",
"arm/extendsfdf2vfp.S",
"arm/fixdfsivfp.S",
"arm/fixsfsivfp.S",
"arm/fixunsdfsivfp.S",
"arm/fixunssfsivfp.S",
"arm/floatsidfvfp.S",
"arm/floatsisfvfp.S",
"arm/floatunssidfvfp.S",
"arm/floatunssisfvfp.S",
"arm/gedf2vfp.S",
"arm/gesf2vfp.S",
"arm/gtdf2vfp.S",
"arm/gtsf2vfp.S",
"arm/ledf2vfp.S",
"arm/lesf2vfp.S",
"arm/ltdf2vfp.S",
"arm/ltsf2vfp.S",
"arm/muldf3vfp.S",
"arm/mulsf3vfp.S",
"arm/nedf2vfp.S",
"arm/nesf2vfp.S",
"arm/restore_vfp_d8_d15_regs.S",
"arm/save_vfp_d8_d15_regs.S",
"arm/subdf3vfp.S",
"arm/subsf3vfp.S"]);
}
sources.extend(&["arm/negdf2vfp.S", "arm/negsf2vfp.S"]);
}
if target_arch == "aarch64" {
sources.extend(&["comparetf2.c",
"extenddftf2.c",
"extendsftf2.c",
"fixtfdi.c",
"fixtfsi.c",
"fixtfti.c",
"fixunstfdi.c",
"fixunstfsi.c",
"fixunstfti.c",
"floatditf.c",
"floatsitf.c",
"floatunditf.c",
"floatunsitf.c",
"multc3.c",
"trunctfdf2.c",
"trunctfsf2.c"]);
}
// Remove the assembly implementations that won't compile for the target
if llvm_target[0] == "thumbv6m" {
sources.remove(&["aeabi_cdcmp",
"aeabi_cfcmp",
"aeabi_dcmp",
"aeabi_fcmp",
"clzdi2",
"clzsi2",
"comparesf2",
"divmodsi4",
"divsi3",
"modsi3",
"switch16",
"switch32",
"switch8",
"switchu8",
"udivmodsi4",
"udivsi3",
"umodsi3"]);
// But use some generic implementations where possible
sources.extend(&["clzdi2.c", "clzsi2.c"])
}
if llvm_target[0] == "thumbv7m" || llvm_target[0] == "thumbv7em" {
sources.remove(&["aeabi_cdcmp", "aeabi_cfcmp"]);
}
for src in sources.map.values() {
cfg.file(Path::new("compiler-rt/lib/builtins").join(src));
}
cfg.compile("libcompiler-rt.a");
}
// To filter away some flaky test (see src/float/add.rs for details)
if llvm_target.last() == Some(&"gnueabihf") {
println!("cargo:rustc-cfg=gnueabihf") println!("cargo:rustc-cfg=gnueabihf")
} }
println!("cargo:rerun-if-changed=build.rs");
// To compile intrinsics.rs for thumb targets, where there is no libc
if llvm_target[0].starts_with("thumb") {
println!("cargo:rustc-cfg=thumb")
}
// compiler-rt `cfg`s away some intrinsics for thumbv6m because that target doesn't have full
// THUMBv2 support. We have to cfg our code accordingly.
if llvm_target[0] == "thumbv6m" {
println!("cargo:rustc-cfg=thumbv6m")
}
} }

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@ -68,6 +68,7 @@ pub extern "C" fn __aeabi_fadd(a: f32, b: f32) -> f32 {
::float::add::__addsf3(a, b) ::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)] #[cfg_attr(not(test), no_mangle)]
pub extern "C" fn __aeabi_idiv(a: i32, b: i32) -> i32 { pub extern "C" fn __aeabi_idiv(a: i32, b: i32) -> i32 {
::int::sdiv::__divsi3(a, b) ::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) ::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)] #[cfg_attr(not(test), no_mangle)]
pub extern "C" fn __aeabi_uidiv(a: u32, b: u32) -> u32 { pub extern "C" fn __aeabi_uidiv(a: u32, b: u32) -> u32 {
::int::udiv::__udivsi3(a, b) ::int::udiv::__udivsi3(a, b)

399
src/bin/intrinsics.rs Normal file
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@ -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() {}

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@ -286,8 +286,7 @@ mod tests {
#[test] #[test]
fn test_double_different_nan() { fn test_double_different_nan() {
let a = f64::from_repr(1); let a = f64::from_repr(1);
let b = f64::from_repr( let b = f64::from_repr(0b1111111111110010001000100101010101001000101010000110100011101011);
0b1111111111110010001000100101010101001000101010000110100011101011);
let x = super::__adddf3(a, b); let x = super::__adddf3(a, b);
let y = a + b; let y = a + b;
assert!(x.eq_repr(y)); assert!(x.eq_repr(y));

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@ -66,7 +66,9 @@ macro_rules! mulo {
} }
} }
#[cfg(not(all(feature = "c", target_arch = "x86")))]
mul!(__muldi3: u64); mul!(__muldi3: u64);
mulo!(__mulosi4: i32); mulo!(__mulosi4: i32);
mulo!(__mulodi4: i64); mulo!(__mulodi4: i64);

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@ -36,18 +36,33 @@ macro_rules! divmod {
/// Returns `a / b` and sets `*rem = n % d` /// Returns `a / b` and sets `*rem = n % d`
#[cfg_attr(not(test), no_mangle)] #[cfg_attr(not(test), no_mangle)]
pub extern "C" fn $intrinsic(a: $ty, b: $ty, rem: &mut $ty) -> $ty { 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); *rem = a - (r * b);
r r
} }
} }
} }
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"), not(thumbv6m))))]
div!(__divsi3: i32, u32); div!(__divsi3: i32, u32);
#[cfg(not(all(feature = "c", target_arch = "x86")))]
div!(__divdi3: i64, u64); div!(__divdi3: i64, u64);
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"))))]
mod_!(__modsi3: i32, u32); mod_!(__modsi3: i32, u32);
#[cfg(not(all(feature = "c", target_arch = "x86")))]
mod_!(__moddi3: i64, u64); mod_!(__moddi3: i64, u64);
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"))))]
divmod!(__divmodsi4, __divsi3: i32); divmod!(__divmodsi4, __divsi3: i32);
divmod!(__divmoddi4, __divdi3: i64); divmod!(__divmoddi4, __divdi3: i64);
#[cfg(test)] #[cfg(test)]

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@ -54,8 +54,13 @@ macro_rules! lshr {
} }
} }
#[cfg(not(all(feature = "c", target_arch = "x86")))]
ashl!(__ashldi3: u64); ashl!(__ashldi3: u64);
#[cfg(not(all(feature = "c", target_arch = "x86")))]
ashr!(__ashrdi3: i64); ashr!(__ashrdi3: i64);
#[cfg(not(all(feature = "c", target_arch = "x86")))]
lshr!(__lshrdi3: u64); lshr!(__lshrdi3: u64);
#[cfg(test)] #[cfg(test)]

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@ -2,6 +2,7 @@ use core::mem;
use int::{Int, LargeInt}; use int::{Int, LargeInt};
/// Returns `n / d` /// Returns `n / d`
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"), not(thumbv6m))))]
#[cfg_attr(not(test), no_mangle)] #[cfg_attr(not(test), no_mangle)]
pub extern "C" fn __udivsi3(n: u32, d: u32) -> u32 { pub extern "C" fn __udivsi3(n: u32, d: u32) -> u32 {
// Special cases // Special cases
@ -52,15 +53,27 @@ pub extern "C" fn __udivsi3(n: u32, d: u32) -> u32 {
} }
/// Returns `n % d` /// Returns `n % d`
#[cfg(not(all(feature = "c", target_arch = "arm", not(target_os = "ios"))))]
#[cfg_attr(not(test), no_mangle)] #[cfg_attr(not(test), no_mangle)]
pub extern "C" fn __umodsi3(n: u32, d: u32) -> u32 { 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` /// 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)] #[cfg_attr(not(test), no_mangle)]
pub extern "C" fn __udivmodsi4(n: u32, d: u32, rem: Option<&mut u32>) -> u32 { 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 { if let Some(rem) = rem {
*rem = n - (q * d); *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` /// Returns `n / d`
#[cfg_attr(not(test), no_mangle)] #[cfg_attr(not(test), no_mangle)]
#[cfg(not(all(feature = "c", target_arch = "x86")))]
pub extern "C" fn __udivdi3(n: u64, d: u64) -> u64 { pub extern "C" fn __udivdi3(n: u64, d: u64) -> u64 {
__udivmoddi4(n, d, None) __udivmoddi4(n, d, None)
} }
/// Returns `n % d` /// Returns `n % d`
#[cfg(not(all(feature = "c", target_arch = "x86")))]
#[cfg_attr(not(test), no_mangle)] #[cfg_attr(not(test), no_mangle)]
pub extern "C" fn __umoddi3(a: u64, b: u64) -> u64 { pub extern "C" fn __umoddi3(a: u64, b: u64) -> u64 {
let mut rem = unsafe { mem::uninitialized() }; let mut rem = unsafe { mem::uninitialized() };

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@ -10,6 +10,9 @@
// We disable #[no_mangle] for tests so that we can verify the test results // We disable #[no_mangle] for tests so that we can verify the test results
// against the native compiler-rt implementations of the builtins. // 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)] #[cfg(test)]
#[macro_use] #[macro_use]
extern crate quickcheck; extern crate quickcheck;

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@ -67,4 +67,3 @@ pub unsafe fn ___chkstk() {
ret"); ret");
intrinsics::unreachable(); intrinsics::unreachable();
} }

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@ -1,10 +1,12 @@
{ {
"arch": "arm", "arch": "arm",
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
"executables": true,
"features": "+strict-align", "features": "+strict-align",
"llvm-target": "thumbv6m-none-eabi", "llvm-target": "thumbv6m-none-eabi",
"max-atomic-width": 0, "max-atomic-width": 0,
"os": "none", "os": "none",
"pre-link-args": ["-nostartfiles"],
"target-endian": "little", "target-endian": "little",
"target-pointer-width": "32" "target-pointer-width": "32"
} }

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@ -1,8 +1,10 @@
{ {
"arch": "arm", "arch": "arm",
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", "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", "llvm-target": "thumbv7em-none-eabi",
"os": "none", "os": "none",
"pre-link-args": ["-nostartfiles"],
"target-endian": "little", "target-endian": "little",
"target-pointer-width": "32" "target-pointer-width": "32"
} }

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@ -1,9 +1,11 @@
{ {
"arch": "arm", "arch": "arm",
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
"executables": true,
"features": "+vfp4", "features": "+vfp4",
"llvm-target": "thumbv7em-none-eabihf", "llvm-target": "thumbv7em-none-eabihf",
"os": "none", "os": "none",
"pre-link-args": ["-nostartfiles"],
"target-endian": "little", "target-endian": "little",
"target-pointer-width": "32" "target-pointer-width": "32"
} }

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@ -1,8 +1,10 @@
{ {
"arch": "arm", "arch": "arm",
"data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64", "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", "llvm-target": "thumbv7m-none-eabi",
"os": "none", "os": "none",
"pre-link-args": ["-nostartfiles"],
"target-endian": "little", "target-endian": "little",
"target-pointer-width": "32" "target-pointer-width": "32"
} }