Merge pull request #302 from bjorn3/no_128bit_lang_items

Replace {u,i}128_* lang items with __rust_{u,i}128_* unmangled functions

Author: alexcrichton

src/int/addsub.rs

@@ -90,44 +90,43 @@ where
 impl Subo for i128 {}
 impl Subo for u128 {}
 
-u128_lang_items! {
-    #[lang = "i128_add"]
-    pub fn rust_i128_add(a: i128, b: i128) -> i128 {
-        rust_u128_add(a as _, b as _) as _
+intrinsics! {
+    pub extern "C" fn __rust_i128_add(a: i128, b: i128) -> i128 {
+        __rust_u128_add(a as _, b as _) as _
     }
-    #[lang = "i128_addo"]
-    pub fn rust_i128_addo(a: i128, b: i128) -> (i128, bool) {
+
+    pub extern "C" fn __rust_i128_addo(a: i128, b: i128) -> (i128, bool) {
         let mut oflow = 0;
         let r = a.addo(b, &mut oflow);
         (r, oflow != 0)
     }
-    #[lang = "u128_add"]
-    pub fn rust_u128_add(a: u128, b: u128) -> u128 {
+
+    pub extern "C" fn __rust_u128_add(a: u128, b: u128) -> u128 {
         a.add(b)
     }
-    #[lang = "u128_addo"]
-    pub fn rust_u128_addo(a: u128, b: u128) -> (u128, bool) {
+
+    pub extern "C" fn __rust_u128_addo(a: u128, b: u128) -> (u128, bool) {
         let mut oflow = 0;
         let r = a.addo(b, &mut oflow);
         (r, oflow != 0)
     }
 
-    #[lang = "i128_sub"]
-    pub fn rust_i128_sub(a: i128, b: i128) -> i128 {
-        rust_u128_sub(a as _, b as _) as _
+
+    pub extern "C" fn __rust_i128_sub(a: i128, b: i128) -> i128 {
+        __rust_u128_sub(a as _, b as _) as _
     }
-    #[lang = "i128_subo"]
-    pub fn rust_i128_subo(a: i128, b: i128) -> (i128, bool) {
+
+    pub extern "C" fn __rust_i128_subo(a: i128, b: i128) -> (i128, bool) {
         let mut oflow = 0;
         let r = a.subo(b, &mut oflow);
         (r, oflow != 0)
     }
-    #[lang = "u128_sub"]
-    pub fn rust_u128_sub(a: u128, b: u128) -> u128 {
+
+    pub extern "C" fn __rust_u128_sub(a: u128, b: u128) -> u128 {
         a.sub(b)
     }
-    #[lang = "u128_subo"]
-    pub fn rust_u128_subo(a: u128, b: u128) -> (u128, bool) {
+
+    pub extern "C" fn __rust_u128_subo(a: u128, b: u128) -> (u128, bool) {
         let mut oflow = 0;
         let r = a.subo(b, &mut oflow);
         (r, oflow != 0)

src/int/mul.rs

@@ -107,25 +107,14 @@ intrinsics! {
     pub extern "C" fn __muloti4(a: i128, b: i128, oflow: &mut i32) -> i128 {
         a.mulo(b, oflow)
     }
-}
 
-u128_lang_items! {
-    #[lang = "i128_mul"]
-    pub fn rust_i128_mul(a: i128, b: i128) -> i128 {
-        __multi3(a, b)
-    }
-    #[lang = "i128_mulo"]
-    pub fn rust_i128_mulo(a: i128, b: i128) -> (i128, bool) {
+    pub extern "C" fn __rust_i128_mulo(a: i128, b: i128) -> (i128, bool) {
         let mut oflow = 0;
         let r = __muloti4(a, b, &mut oflow);
         (r, oflow != 0)
     }
-    #[lang = "u128_mul"]
-    pub fn rust_u128_mul(a: u128, b: u128) -> u128 {
-        __multi3(a as _, b as _) as _
-    }
-    #[lang = "u128_mulo"]
-    pub fn rust_u128_mulo(a: u128, b: u128) -> (u128, bool) {
+
+    pub extern "C" fn __rust_u128_mulo(a: u128, b: u128) -> (u128, bool) {
         let mut oflow = 0;
         let r = a.mulo(b, &mut oflow);
         (r, oflow != 0)

src/int/sdiv.rs

@@ -99,14 +99,3 @@ intrinsics! {
         a.divmod(b, rem, |a, b| __divdi3(a, b))
     }
 }
-
-u128_lang_items! {
-    #[lang = "i128_div"]
-    pub fn rust_i128_div(a: i128, b: i128) -> i128 {
-        __divti3(a, b)
-    }
-    #[lang = "i128_rem"]
-    pub fn rust_i128_rem(a: i128, b: i128) -> i128 {
-        __modti3(a, b)
-    }
-}

src/int/shift.rs

@@ -103,40 +103,20 @@ intrinsics! {
     pub extern "C" fn __lshrti3(a: u128, b: u32) -> u128 {
         a.lshr(b)
     }
-}
 
-u128_lang_items! {
-    #[lang = "i128_shl"]
-    pub fn rust_i128_shl(a: i128, b: u32) -> i128 {
-        __ashlti3(a as _, b) as _
-    }
-    #[lang = "i128_shlo"]
-    pub fn rust_i128_shlo(a: i128, b: u128) -> (i128, bool) {
-        (rust_i128_shl(a, b as _), b >= 128)
-    }
-    #[lang = "u128_shl"]
-    pub fn rust_u128_shl(a: u128, b: u32) -> u128 {
-        __ashlti3(a, b)
-    }
-    #[lang = "u128_shlo"]
-    pub fn rust_u128_shlo(a: u128, b: u128) -> (u128, bool) {
-        (rust_u128_shl(a, b as _), b >= 128)
+    pub extern "C" fn __rust_i128_shlo(a: i128, b: u128) -> (i128, bool) {
+        (__ashlti3(a as _, b as _) as _, b >= 128)
     }
 
-    #[lang = "i128_shr"]
-    pub fn rust_i128_shr(a: i128, b: u32) -> i128 {
-        __ashrti3(a, b)
+    pub extern "C" fn __rust_u128_shlo(a: u128, b: u128) -> (u128, bool) {
+        (__ashlti3(a, b as _), b >= 128)
     }
-    #[lang = "i128_shro"]
-    pub fn rust_i128_shro(a: i128, b: u128) -> (i128, bool) {
-        (rust_i128_shr(a, b as _), b >= 128)
-    }
-    #[lang = "u128_shr"]
-    pub fn rust_u128_shr(a: u128, b: u32) -> u128 {
-        __lshrti3(a, b)
+
+    pub extern "C" fn __rust_i128_shro(a: i128, b: u128) -> (i128, bool) {
+        (__ashrti3(a, b as _), b >= 128)
     }
-    #[lang = "u128_shro"]
-    pub fn rust_u128_shro(a: u128, b: u128) -> (u128, bool) {
-        (rust_u128_shr(a, b as _), b >= 128)
+
+    pub extern "C" fn __rust_u128_shro(a: u128, b: u128) -> (u128, bool) {
+        (__lshrti3(a, b as _), b >= 128)
     }
 }

src/int/udiv.rs

@@ -268,14 +268,3 @@ intrinsics! {
         udivmod_inner!(n, d, rem, u128)
     }
 }
-
-u128_lang_items! {
-    #[lang = "u128_div"]
-    pub fn rust_u128_div(a: u128, b: u128) -> u128 {
-        __udivti3(a, b)
-    }
-    #[lang = "u128_rem"]
-    pub fn rust_u128_rem(a: u128, b: u128) -> u128 {
-        __umodti3(a, b)
-    }
-}

src/macros.rs

@@ -280,17 +280,3 @@ pub mod win64_128bit_abi_hack {
         }
     }
 }
-
-macro_rules! u128_lang_items {
-    ($(
-        #[lang = $lang:tt]
-        pub fn $name:ident( $($argname:ident:  $ty:ty),* ) -> $ret:ty {
-            $($body:tt)*
-        }
-    )*) => ($(
-        #[cfg_attr(not(any(stage0, feature = "no-lang-items")), lang = $lang)]
-        pub fn $name( $($argname:  $ty),* ) -> $ret {
-            $($body)*
-        }
-    )*)
-}

testcrate/build.rs

@@ -707,35 +707,35 @@ fn main() {
     // int/addsub.rs
     gen(
         |(a, b): (MyU128, MyU128)| Some(a.0.wrapping_add(b.0)),
-        "builtins::int::addsub::rust_u128_add(a, b)",
+        "builtins::int::addsub::__rust_u128_add(a, b)",
     );
     gen(
         |(a, b): (MyI128, MyI128)| Some(a.0.wrapping_add(b.0)),
-        "builtins::int::addsub::rust_i128_add(a, b)",
+        "builtins::int::addsub::__rust_i128_add(a, b)",
     );
     gen(
         |(a, b): (MyU128, MyU128)| Some(a.0.overflowing_add(b.0)),
-        "builtins::int::addsub::rust_u128_addo(a, b)",
+        "builtins::int::addsub::__rust_u128_addo(a, b)",
     );
     gen(
         |(a, b): (MyI128, MyI128)| Some(a.0.overflowing_add(b.0)),
-        "builtins::int::addsub::rust_i128_addo(a, b)",
+        "builtins::int::addsub::__rust_i128_addo(a, b)",
     );
     gen(
         |(a, b): (MyU128, MyU128)| Some(a.0.wrapping_sub(b.0)),
-        "builtins::int::addsub::rust_u128_sub(a, b)",
+        "builtins::int::addsub::__rust_u128_sub(a, b)",
     );
     gen(
         |(a, b): (MyI128, MyI128)| Some(a.0.wrapping_sub(b.0)),
-        "builtins::int::addsub::rust_i128_sub(a, b)",
+        "builtins::int::addsub::__rust_i128_sub(a, b)",
     );
     gen(
         |(a, b): (MyU128, MyU128)| Some(a.0.overflowing_sub(b.0)),
-        "builtins::int::addsub::rust_u128_subo(a, b)",
+        "builtins::int::addsub::__rust_u128_subo(a, b)",
     );
     gen(
         |(a, b): (MyI128, MyI128)| Some(a.0.overflowing_sub(b.0)),
-        "builtins::int::addsub::rust_i128_subo(a, b)",
+        "builtins::int::addsub::__rust_i128_subo(a, b)",
     );
 
     // int/mul.rs