u128 udiv intrinsics

Author: est31

README.md

@@ -208,9 +208,9 @@ These builtins are needed to support 128-bit integers, which are in the process
 - [ ] modti3.c
 - [x] muloti4.c
 - [x] multi3.c
-- [ ] udivmodti4.c
-- [ ] udivti3.c
-- [ ] umodti3.c
+- [x] udivmodti4.c
+- [x] udivti3.c
+- [x] umodti3.c
 
 ## Unimplemented functions
 

build.rs

@@ -207,10 +207,7 @@ fn main() {
                              "subtf3.c",
                              "subvti3.c",
                              "trampoline_setup.c",
-                             "ucmpti2.c",
-                             "udivmodti4.c",
-                             "udivti3.c",
-                             "umodti3.c"]);
+                             "ucmpti2.c"]);
         }
 
         if target_vendor == "apple" {

src/int/udiv.rs

@@ -96,23 +96,45 @@ pub extern "C" fn __udivmodsi4(n: u32, d: u32, rem: Option<&mut u32>) -> u32 {
     q
 }
 
-/// 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)
+macro_rules! div_mod_intrinsics {
+    ($udiv_intr:ident, $umod_intr:ident : $ty:ty) => {
+        div_mod_intrinsics!($udiv_intr, $umod_intr : $ty,
+                            __udivmoddi4);
+    };
+    ($udiv_intr:ident, $umod_intr:ident : $ty:ty, $divmod_intr:expr) => {
+        div_mod_intrinsics!($udiv_intr, $umod_intr : $ty,
+                            $divmod_intr, $ty, |i|{ i });
+    };
+    ($udiv_intr:ident, $umod_intr:ident : $ty:ty, $divmod_intr:expr,
+     $tyret:ty, $conv:expr) => {
+        /// Returns `n / d`
+        pub extern "C" fn $udiv_intr(n: $ty, d: $ty) -> $tyret {
+            let r = $divmod_intr(n, d, None);
+            ($conv)(r)
+        }
+
+        /// Returns `n % d`
+        pub extern "C" fn $umod_intr(a: $ty, b: $ty) -> $tyret {
+            use core::mem;
+
+            let mut rem = unsafe { mem::uninitialized() };
+            $divmod_intr(a, b, Some(&mut rem));
+            ($conv)(rem)
+        }
+    }
 }
 
-/// 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 {
-    use core::mem;
+#[cfg(not(all(feature = "c", target_arch = "x86")))]
+div_mod_intrinsics!(__udivdi3, __umoddi3: u64);
 
-    let mut rem = unsafe { mem::uninitialized() };
-    __udivmoddi4(a, b, Some(&mut rem));
-    rem
-}
+#[cfg(not(stage0))]
+#[cfg(not(all(windows, target_pointer_width="64")))]
+div_mod_intrinsics!(__udivti3, __umodti3: u128, u128_div_mod);
+
+#[cfg(not(stage0))]
+#[cfg(all(windows, target_pointer_width="64"))]
+div_mod_intrinsics!(__udivti3, __umodti3: u128, u128_div_mod, ::U64x2, ::conv);
 
 macro_rules! udivmod_inner {
     ($n:expr, $d:expr, $rem:expr, $ty:ty) => {{
@@ -269,6 +291,31 @@ pub extern "C" fn __udivmoddi4(n: u64, d: u64, rem: Option<&mut u64>) -> u64 {
     udivmod_inner!(n, d, rem, u64)
 }
 
+macro_rules! udivmodti4 {
+    ($tyret:ty, $conv:expr) => {
+        /// Returns `n / d` and sets `*rem = n % d`
+        #[cfg_attr(not(test), no_mangle)]
+        pub extern "C" fn __udivmodti4(n: u128, d: u128, rem: Option<&mut u128>) -> $tyret {
+            let r = u128_div_mod(n, d, rem);
+            ($conv)(r)
+        }
+    }
+}
+
+/// Returns `n / d` and sets `*rem = n % d`
+#[cfg(not(stage0))]
+fn u128_div_mod(n: u128, d: u128, rem: Option<&mut u128>) -> u128 {
+    udivmod_inner!(n, d, rem, u128)
+}
+
+#[cfg(not(stage0))]
+#[cfg(all(windows, target_pointer_width="64"))]
+udivmodti4!(::U64x2, ::conv);
+
+#[cfg(not(stage0))]
+#[cfg(not(all(windows, target_pointer_width="64")))]
+udivmodti4!(u128, |i|{ i });
+
 #[cfg(test)]
 mod tests {
     use qc::{U32, U64};

src/lib.rs

@@ -100,6 +100,16 @@ type U128_ = u128;
 #[cfg(not(stage0))]
 type I128_ = i128;
 
+// Hack for LLVM expectations for ABI on windows
+#[cfg(all(windows, target_pointer_width="64"))]
+#[repr(simd)]
+struct U64x2(u64, u64);
+
+#[cfg(all(windows, target_pointer_width="64"))]
+fn conv(i: u128) -> U64x2 {
+    U64x2(i.low(), i.high())
+}
+
 #[cfg(test)]
 #[macro_use]
 extern crate quickcheck;