lgtm
Nice!
================
Comment at: lib/Headers/Intrin.h:423
@@ +422,3 @@
+ unsigned __int64 *_HighProduct) {
+ __int128 FullProduct =
+ (unsigned __int128)_Multiplier * (unsigned __int128)_Multiplicand;
----------------
hans wrote:
> use an underscore for FullProduct to be safe?
Why not unsigned __int128? I believe this affects the shift right below, but
all the bits that would be 1 are truncated out.
http://reviews.llvm.org/D6486
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