1 files changed, 41 insertions, 0 deletions
diff --git a/compiler/rustc_codegen_cranelift/src/compiler_builtins.rs b/compiler/rustc_codegen_cranelift/src/compiler_builtins.rs
new file mode 100644
index 00000000000..177f850afb3
--- /dev/null
+++ b/compiler/rustc_codegen_cranelift/src/compiler_builtins.rs
@@ -0,0 +1,41 @@
+macro builtin_functions($register:ident; $(fn $name:ident($($arg_name:ident: $arg_ty:ty),*) -> $ret_ty:ty;)*) {
+    #[cfg(feature = "jit")]
+    #[allow(improper_ctypes)]
+    extern "C" {
+        $(fn $name($($arg_name: $arg_ty),*) -> $ret_ty;)*
+    }
+
+    #[cfg(feature = "jit")]
+    pub(crate) fn $register(builder: &mut cranelift_jit::JITBuilder) {
+        for &(name, val) in &[$((stringify!($name), $name as *const u8)),*] {
+            builder.symbol(name, val);
+        }
+    }
+}
+
+builtin_functions! {
+    register_functions_for_jit;
+
+    // integers
+    fn __multi3(a: i128, b: i128) -> i128;
+    fn __udivti3(n: u128, d: u128) -> u128;
+    fn __divti3(n: i128, d: i128) -> i128;
+    fn __umodti3(n: u128, d: u128) -> u128;
+    fn __modti3(n: i128, d: i128) -> i128;
+    fn __rust_u128_addo(a: u128, b: u128) -> (u128, bool);
+    fn __rust_i128_addo(a: i128, b: i128) -> (i128, bool);
+    fn __rust_u128_subo(a: u128, b: u128) -> (u128, bool);
+    fn __rust_i128_subo(a: i128, b: i128) -> (i128, bool);
+    fn __rust_u128_mulo(a: u128, b: u128) -> (u128, bool);
+    fn __rust_i128_mulo(a: i128, b: i128) -> (i128, bool);
+
+    // floats
+    fn __floattisf(i: i128) -> f32;
+    fn __floattidf(i: i128) -> f64;
+    fn __floatuntisf(i: u128) -> f32;
+    fn __floatuntidf(i: u128) -> f64;
+    fn __fixsfti(f: f32) -> i128;
+    fn __fixdfti(f: f64) -> i128;
+    fn __fixunssfti(f: f32) -> u128;
+    fn __fixunsdfti(f: f64) -> u128;
+}