From 002c131055c7e25f442629de9534f7dc93af614b Mon Sep 17 00:00:00 2001
From: Nathan Froyd <froydnj@mozilla.com>
Date: Wed, 4 Jun 2014 15:19:51 -0400
Subject: [PATCH] Bug 1020118 - fix atomic add/sub for pointer types on Win64;
 r=jcranmer

---
 mfbt/Atomics.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mfbt/Atomics.h b/mfbt/Atomics.h
index 224de27b06bf..96e4e982db36 100644
--- a/mfbt/Atomics.h
+++ b/mfbt/Atomics.h
@@ -870,13 +870,13 @@ struct IntrinsicAddSub<T*> : public IntrinsicApplyHelper<T*>
   static ValueType add(ValueType& aPtr, ptrdiff_t aAmount)
   {
     return applyBinaryFunction(&Primitives::add, aPtr,
-                               (ValueType)(aAmount * sizeof(ValueType)));
+                               (ValueType)(aAmount * sizeof(T)));
   }
 
   static ValueType sub(ValueType& aPtr, ptrdiff_t aAmount)
   {
     return applyBinaryFunction(&Primitives::sub, aPtr,
-                               (ValueType)(aAmount * sizeof(ValueType)));
+                               (ValueType)(aAmount * sizeof(T)));
   }
 };