Clarify naming confusion "_mul128" vs. "__mul128"

CaseyCarter · web-flow · commit d04b55cecedf · 2019-03-27T13:20:37.000-07:00
The proper name is `_mul128`.
diff --git a/docs/intrinsics/mul128.md b/docs/intrinsics/mul128.md
@@ -1,11 +1,11 @@
 ---
-title: "__mul128"
+title: "_mul128"
 ms.date: "11/04/2016"
-f1_keywords: ["__mul128"]
-helpviewer_keywords: ["mul128 intrinsic", "__mul128 intrinsic"]
+f1_keywords: ["_mul128"]
+helpviewer_keywords: ["mul128 intrinsic", "_mul128 intrinsic"]
 ms.assetid: f68914b9-bffb-4e46-b1ba-4c249f7b4ecc
 ---
-# __mul128
+# _mul128
 
 **Microsoft Specific**
 
@@ -40,7 +40,7 @@ The low 64 bits of the product.
 
 |Intrinsic|Architecture|
 |---------------|------------------|
-|`__mul128`|x64|
+|`_mul128`|x64|
 
 **Header file** \<intrin.h>
 
@@ -74,4 +74,4 @@ int main()
 
 ## See Also
 
-[Compiler Intrinsics](../intrinsics/compiler-intrinsics.md)
+[Compiler Intrinsics](../intrinsics/compiler-intrinsics.md)
