vcpkg/ports/boost-json/0001-Fix-use-of-intrinsics-on-windows-ARM-platforms.patch

From c4ce8509d015a0b75cfa9d36609b8409821a9c86 Mon Sep 17 00:00:00 2001
From: Matt Borland <matt@mattborland.com>
Date: Fri, 11 Aug 2023 09:20:47 -0400
Subject: [PATCH 1/2] Fix use of intrinsics on windows ARM platforms

---
 .../json/detail/charconv/detail/emulated128.hpp      | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/include/boost/json/detail/charconv/detail/emulated128.hpp b/include/boost/json/detail/charconv/detail/emulated128.hpp
index 3a1a392..6eadbc7 100644
--- a/include/boost/json/detail/charconv/detail/emulated128.hpp
+++ b/include/boost/json/detail/charconv/detail/emulated128.hpp
@@ -58,11 +58,15 @@ struct uint128
 
 static inline std::uint64_t umul64(std::uint32_t x, std::uint32_t y) noexcept
 {
-#if defined(BOOST_JSON_HAS_MSVC_32BIT_INTRINSICS)
+    #if defined(BOOST_JSON_HAS_MSVC_32BIT_INTRINSICS) && !defined(_M_ARM64)
+
     return __emulu(x, y);
-#else
+
+    #else
+
     return x * static_cast<std::uint64_t>(y);
-#endif
+    
+    #endif
 }
 
 // Get 128-bit result of multiplication of two 64-bit unsigned integers.
@@ -73,7 +77,7 @@ BOOST_JSON_SAFEBUFFERS inline uint128 umul128(std::uint64_t x, std::uint64_t y)
     auto result = static_cast<boost::uint128_type>(x) * static_cast<boost::uint128_type>(y);
     return {static_cast<std::uint64_t>(result >> 64), static_cast<std::uint64_t>(result)};
 
-    #elif defined(BOOST_JSON_HAS_MSVC_64BIT_INTRINSICS)
+    #elif defined(BOOST_JSON_HAS_MSVC_64BIT_INTRINSICS) && !defined(_M_ARM64)
 
     std::uint64_t high;
     std::uint64_t low = _umul128(x, y, &high);
-- 
2.38.1.windows.1