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-rw-r--r--vendor/compiler_builtins/examples/intrinsics.rs398
1 files changed, 398 insertions, 0 deletions
diff --git a/vendor/compiler_builtins/examples/intrinsics.rs b/vendor/compiler_builtins/examples/intrinsics.rs
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+++ b/vendor/compiler_builtins/examples/intrinsics.rs
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+// By compiling this file we check that all the intrinsics we care about continue to be provided by
+// the `compiler_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)]
+#![cfg_attr(thumb, no_main)]
+#![deny(dead_code)]
+#![feature(bench_black_box)]
+#![feature(lang_items)]
+#![feature(start)]
+#![feature(allocator_api)]
+#![no_std]
+
+extern crate panic_handler;
+
+#[cfg(all(not(thumb), not(windows), not(target_arch = "wasm32")))]
+#[link(name = "c")]
+extern "C" {}
+
+// 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.
+mod intrinsics {
+ // truncdfsf2
+ pub fn aeabi_d2f(x: f64) -> f32 {
+ x as f32
+ }
+
+ // fixdfsi
+ pub fn aeabi_d2i(x: f64) -> i32 {
+ x as i32
+ }
+
+ // fixdfdi
+ pub fn aeabi_d2l(x: f64) -> i64 {
+ x as i64
+ }
+
+ // fixunsdfsi
+ pub fn aeabi_d2uiz(x: f64) -> u32 {
+ x as u32
+ }
+
+ // fixunsdfdi
+ pub fn aeabi_d2ulz(x: f64) -> u64 {
+ x as u64
+ }
+
+ // adddf3
+ pub fn aeabi_dadd(a: f64, b: f64) -> f64 {
+ a + b
+ }
+
+ // eqdf2
+ pub fn aeabi_dcmpeq(a: f64, b: f64) -> bool {
+ a == b
+ }
+
+ // gtdf2
+ pub fn aeabi_dcmpgt(a: f64, b: f64) -> bool {
+ a > b
+ }
+
+ // ltdf2
+ pub fn aeabi_dcmplt(a: f64, b: f64) -> bool {
+ a < b
+ }
+
+ // 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
+ pub fn aeabi_f2lz(x: f32) -> i64 {
+ x as i64
+ }
+
+ // fixunssfsi
+ pub fn aeabi_f2uiz(x: f32) -> u32 {
+ x as u32
+ }
+
+ // fixunssfdi
+ pub fn aeabi_f2ulz(x: f32) -> u64 {
+ x as u64
+ }
+
+ // addsf3
+ pub fn aeabi_fadd(a: f32, b: f32) -> f32 {
+ a + b
+ }
+
+ // eqsf2
+ pub fn aeabi_fcmpeq(a: f32, b: f32) -> bool {
+ a == b
+ }
+
+ // gtsf2
+ pub fn aeabi_fcmpgt(a: f32, b: f32) -> bool {
+ a > b
+ }
+
+ // ltsf2
+ pub fn aeabi_fcmplt(a: f32, b: f32) -> bool {
+ a < b
+ }
+
+ // 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 umoddi3(a: u64, b: u64) -> u64 {
+ a % b
+ }
+
+ pub fn muloti4(a: u128, b: u128) -> Option<u128> {
+ a.checked_mul(b)
+ }
+
+ pub fn multi3(a: u128, b: u128) -> u128 {
+ a.wrapping_mul(b)
+ }
+
+ pub fn ashlti3(a: u128, b: usize) -> u128 {
+ a >> b
+ }
+
+ pub fn ashrti3(a: u128, b: usize) -> u128 {
+ a << b
+ }
+
+ pub fn lshrti3(a: i128, b: usize) -> i128 {
+ a >> b
+ }
+
+ pub fn udivti3(a: u128, b: u128) -> u128 {
+ a / b
+ }
+
+ pub fn umodti3(a: u128, b: u128) -> u128 {
+ a % b
+ }
+
+ pub fn divti3(a: i128, b: i128) -> i128 {
+ a / b
+ }
+
+ pub fn modti3(a: i128, b: i128) -> i128 {
+ a % b
+ }
+
+ pub fn udivsi3(a: u32, b: u32) -> u32 {
+ a / b
+ }
+}
+
+fn run() {
+ use core::hint::black_box as bb;
+ use intrinsics::*;
+
+ bb(aeabi_d2f(bb(2.)));
+ bb(aeabi_d2i(bb(2.)));
+ bb(aeabi_d2l(bb(2.)));
+ bb(aeabi_d2uiz(bb(2.)));
+ bb(aeabi_d2ulz(bb(2.)));
+ bb(aeabi_dadd(bb(2.), bb(3.)));
+ bb(aeabi_dcmpeq(bb(2.), bb(3.)));
+ bb(aeabi_dcmpgt(bb(2.), bb(3.)));
+ bb(aeabi_dcmplt(bb(2.), bb(3.)));
+ bb(aeabi_ddiv(bb(2.), bb(3.)));
+ bb(aeabi_dmul(bb(2.), bb(3.)));
+ bb(aeabi_dsub(bb(2.), bb(3.)));
+ bb(aeabi_f2d(bb(2.)));
+ bb(aeabi_f2iz(bb(2.)));
+ bb(aeabi_f2lz(bb(2.)));
+ bb(aeabi_f2uiz(bb(2.)));
+ bb(aeabi_f2ulz(bb(2.)));
+ bb(aeabi_fadd(bb(2.), bb(3.)));
+ bb(aeabi_fcmpeq(bb(2.), bb(3.)));
+ bb(aeabi_fcmpgt(bb(2.), bb(3.)));
+ bb(aeabi_fcmplt(bb(2.), bb(3.)));
+ bb(aeabi_fdiv(bb(2.), bb(3.)));
+ bb(aeabi_fmul(bb(2.), bb(3.)));
+ bb(aeabi_fsub(bb(2.), bb(3.)));
+ bb(aeabi_i2d(bb(2)));
+ bb(aeabi_i2f(bb(2)));
+ bb(aeabi_idiv(bb(2), bb(3)));
+ bb(aeabi_idivmod(bb(2), bb(3)));
+ bb(aeabi_l2d(bb(2)));
+ bb(aeabi_l2f(bb(2)));
+ bb(aeabi_ldivmod(bb(2), bb(3)));
+ bb(aeabi_lmul(bb(2), bb(3)));
+ bb(aeabi_ui2d(bb(2)));
+ bb(aeabi_ui2f(bb(2)));
+ bb(aeabi_uidiv(bb(2), bb(3)));
+ bb(aeabi_uidivmod(bb(2), bb(3)));
+ bb(aeabi_ul2d(bb(2)));
+ bb(aeabi_ul2f(bb(2)));
+ bb(aeabi_uldivmod(bb(2), bb(3)));
+ bb(moddi3(bb(2), bb(3)));
+ bb(mulodi4(bb(2), bb(3)));
+ bb(umoddi3(bb(2), bb(3)));
+ bb(muloti4(bb(2), bb(2)));
+ bb(multi3(bb(2), bb(2)));
+ bb(ashlti3(bb(2), bb(2)));
+ bb(ashrti3(bb(2), bb(2)));
+ bb(lshrti3(bb(2), bb(2)));
+ bb(udivti3(bb(2), bb(2)));
+ bb(umodti3(bb(2), bb(2)));
+ bb(divti3(bb(2), bb(2)));
+ bb(modti3(bb(2), bb(2)));
+ bb(udivsi3(bb(2), bb(2)));
+
+ something_with_a_dtor(&|| assert_eq!(bb(1), 1));
+
+ extern "C" {
+ fn rust_begin_unwind(x: usize);
+ }
+ // if bb(false) {
+ unsafe {
+ rust_begin_unwind(0);
+ }
+ // }
+}
+
+fn something_with_a_dtor(f: &dyn Fn()) {
+ struct A<'a>(&'a (dyn Fn() + 'a));
+
+ impl<'a> Drop for A<'a> {
+ fn drop(&mut self) {
+ (self.0)();
+ }
+ }
+ let _a = A(f);
+ f();
+}
+
+#[cfg(not(thumb))]
+#[start]
+fn main(_: isize, _: *const *const u8) -> isize {
+ run();
+ 0
+}
+
+#[cfg(thumb)]
+#[no_mangle]
+pub fn _start() -> ! {
+ run();
+ loop {}
+}
+
+#[cfg(windows)]
+#[link(name = "kernel32")]
+#[link(name = "msvcrt")]
+extern "C" {}
+
+// ARM targets need these symbols
+#[no_mangle]
+pub fn __aeabi_unwind_cpp_pr0() {}
+
+#[no_mangle]
+pub fn __aeabi_unwind_cpp_pr1() {}
+
+#[cfg(not(windows))]
+#[allow(non_snake_case)]
+#[no_mangle]
+pub fn _Unwind_Resume() {}
+
+#[cfg(not(windows))]
+#[lang = "eh_personality"]
+#[no_mangle]
+pub extern "C" fn eh_personality() {}
+
+#[cfg(all(windows, target_env = "gnu"))]
+mod mingw_unwinding {
+ #[no_mangle]
+ pub fn rust_eh_personality() {}
+ #[no_mangle]
+ pub fn rust_eh_unwind_resume() {}
+ #[no_mangle]
+ pub fn rust_eh_register_frames() {}
+ #[no_mangle]
+ pub fn rust_eh_unregister_frames() {}
+}
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