Avoid accessing union value through inactive member

1 files changed, 3 insertions, 2 deletions

diff --git a/blake2.cpp b/blake2.cpp
index 2e73bdd1..cb274c99 100644
--- a/blake2.cpp
+++ b/blake2.cpp
@@ -13,7 +13,8 @@
 

 NAMESPACE_BEGIN(CryptoPP)

 

-// Uncomment for benchmarking C++ against NEON

+// Uncomment for benchmarking C++ against SSE2 or NEON

+// #undef CRYPTOPP_BOOL_SSE4_INTRINSICS_AVAILABLE

 // #undef CRYPTOPP_BOOL_NEON_INTRINSICS_AVAILABLE

 

 // Visual Studio needs both VS2005 (1400) and _M_64 for SSE2 and _mm_set_epi64x()

@@ -46,7 +47,7 @@ inline __m128i _mm_set_epi64x(const uint64_t a, const uint64_t b)
 

     INT_128_64 v;

     v.v64[0] = b; v.v64[1] = a; 

-    return v.v128;

+    return *(reinterpret_cast<__m128i*>(v.v64));

 }

 #endif