---

yaml
---
r: 232749
b: refs/heads/try
c: 4653a8b
h: refs/heads/master
i:
  232747: a55fcea
v: v3

Author: ranma42

[refs]

@@ -1,7 +1,7 @@
 ---
 refs/heads/master: edeb4f1c86cbf6af8ef9874d4b3af50f721ea1b8
 refs/heads/snap-stage3: 1af31d4974e33027a68126fa5a5a3c2c6491824f
-refs/heads/try: 152c76ef0d62b2529b50356773ac6907a6db0f6e
+refs/heads/try: 4653a8b3fd69dbab366a8ec67ae9cf68dc128c43
 refs/tags/release-0.1: 1f5c5126e96c79d22cb7862f75304136e204f105
 refs/tags/release-0.2: c870d2dffb391e14efb05aa27898f1f6333a9596
 refs/tags/release-0.3: b5f0d0f648d9a6153664837026ba1be43d3e2503

branches/try/src/libcore/ops.rs

@@ -441,6 +441,7 @@ macro_rules! rem_impl_integer {
 
 rem_impl_integer! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 
+#[cfg(not(stage0))]
 macro_rules! rem_impl_float {
     ($($t:ty)*) => ($(
         #[stable(feature = "rust1", since = "1.0.0")]
@@ -455,8 +456,48 @@ macro_rules! rem_impl_float {
     )*)
 }
 
+#[cfg(not(stage0))]
 rem_impl_float! { f32 f64 }
 
+#[stable(feature = "rust1", since = "1.0.0")]
+#[cfg(stage0)]
+impl Rem for f32 {
+    type Output = f32;
+
+    // The builtin f32 rem operator is broken when targeting
+    // MSVC; see comment in std::f32::floor.
+    // FIXME: See also #27859.
+    #[inline]
+    #[cfg(target_env = "msvc")]
+    fn rem(self, other: f32) -> f32 {
+        (self as f64).rem(other as f64) as f32
+    }
+
+    #[inline]
+    #[cfg(not(target_env = "msvc"))]
+    fn rem(self, other: f32) -> f32 {
+        extern { fn fmodf(a: f32, b: f32) -> f32; }
+        unsafe { fmodf(self, other) }
+    }
+}
+
+#[stable(feature = "rust1", since = "1.0.0")]
+#[cfg(stage0)]
+impl Rem for f64 {
+    type Output = f64;
+
+    #[inline]
+    fn rem(self, other: f64) -> f64 {
+        extern { fn fmod(a: f64, b: f64) -> f64; }
+        unsafe { fmod(self, other) }
+    }
+}
+
+#[cfg(stage0)]
+forward_ref_binop! { impl Rem, rem for f64, f64 }
+#[cfg(stage0)]
+forward_ref_binop! { impl Rem, rem for f32, f32 }
+
 /// The `Neg` trait is used to specify the functionality of unary `-`.
 ///
 /// # Examples