1 files changed, 15 insertions, 0 deletions
diff --git a/libcore/num/wrapping.rs b/libcore/num/wrapping.rs
index e28a36a..4857817 100644
--- a/libcore/num/wrapping.rs
+++ b/libcore/num/wrapping.rs
@@ -275,6 +275,15 @@ macro_rules! wrapping_impl {
                 *self = *self & other;
             }
         }
+
+        #[stable(feature = "wrapping_neg", since = "1.10.0")]
+        impl Neg for Wrapping<$t> {
+            type Output = Self;
+            #[inline(always)]
+            fn neg(self) -> Self {
+                Wrapping(0) - self
+            }
+        }
     )*)
 }
 
@@ -283,6 +292,12 @@ wrapping_impl! { usize u8 u16 u32 u64 isize i8 i16 i32 i64 }
 mod shift_max {
     #![allow(non_upper_case_globals)]
 
+    #[cfg(target_pointer_width = "16")]
+    mod platform {
+        pub const usize: u32 = super::u16;
+        pub const isize: u32 = super::i16;
+    }
+
     #[cfg(target_pointer_width = "32")]
     mod platform {
         pub const usize: u32 = super::u32;