From f532b02a96edb154ba7edcc3684f6175cea009bf Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Sat, 23 Jul 2016 21:39:18 -0400
Subject: [PATCH] Add replacement for _mm_set_epi64x under Sun Studio 12.3 and
 below

---
 blake2.cpp | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/blake2.cpp b/blake2.cpp
index 1fa6ef44..e44d99ef 100644
--- a/blake2.cpp
+++ b/blake2.cpp
@@ -34,10 +34,20 @@ NAMESPACE_BEGIN(CryptoPP)
 # undef CRYPTOPP_BOOL_SSE4_INTRINSICS_AVAILABLE
 #endif
 
-// SunCC needs 12.4 for _mm_set_epi64x, _mm_blend_epi16, _mm_shuffle_epi16, etc
+// Sun Studio 12.3 and earlier lack SSE2's _mm_set_epi64x.
+// Also see http://stackoverflow.com/a/38547909/608639
 #if defined(__SUNPRO_CC) && (__SUNPRO_CC < 0x5130)
-# undef CRYPTOPP_BOOL_SSE2_INTRINSICS_AVAILABLE
-# undef CRYPTOPP_BOOL_SSE4_INTRINSICS_AVAILABLE
+inline __m128i _mm_set_epi64x(const uint64_t a, const uint64_t b)
+{
+    union INT_128_64 {
+        __m128i   v128;
+        uint64_t  v64[2];
+    };
+
+    INT_128_64 v;
+    v.v64[0] = a; v.v64[1] = b; 
+    return v.v128;
+}
 #endif
 
 // C/C++ implementation