From a20c56ea4911ae052cf358b191a1009cbb6c0b45 Mon Sep 17 00:00:00 2001
From: Jeffrey Walton <noloader@gmail.com>
Date: Thu, 3 Jan 2019 20:06:39 -0500
Subject: Fix SIMON128 and SPECK128 NEON compile with MSVC compiler (GH #776)

---
 simon128_simd.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'simon128_simd.cpp')

diff --git a/simon128_simd.cpp b/simon128_simd.cpp
index a6cdf0d8..29a9b1bc 100644
--- a/simon128_simd.cpp
+++ b/simon128_simd.cpp
@@ -62,6 +62,14 @@ using CryptoPP::vec_swap;  // SunCC
 
 #if (CRYPTOPP_ARM_NEON_AVAILABLE)
 
+// Missing from Microsoft's implementation???
+#if defined(_MSC_VER)
+inline uint64x2_t vld1q_dup_u64(const uint64_t* ptr)
+{
+	return vmovq_n_u64(*ptr);
+}
+#endif
+
 template <class T>
 inline T UnpackHigh64(const T& a, const T& b)
 {
-- 
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