From c963dbc48d1b4fe87f64782d6325b98334d4ab27 Mon Sep 17 00:00:00 2001
From: Ari Vuollet <ari.vuollet@kapsi.fi>
Date: Sat, 11 May 2024 19:02:09 +0300
Subject: [PATCH] Patch rapidjson for Windows on ARM

---
 Source/ThirdParty/rapidjson/internal/biginteger.h | 6 +++++-
 Source/ThirdParty/rapidjson/internal/diyfp.h      | 6 +++++-
 Source/ThirdParty/rapidjson/rapidjson.h           | 2 +-
 3 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/Source/ThirdParty/rapidjson/internal/biginteger.h b/Source/ThirdParty/rapidjson/internal/biginteger.h
index acc26fa27..a9d3586c3 100644
--- a/Source/ThirdParty/rapidjson/internal/biginteger.h
+++ b/Source/ThirdParty/rapidjson/internal/biginteger.h
@@ -17,14 +17,18 @@
 
 #include "../rapidjson.h"
 
-#if defined(_MSC_VER) && defined(_M_AMD64)
+#if defined(_MSC_VER) && (defined(_M_AMD64) || defined(_M_ARM64))
 #if _MSC_VER <= 1900
 #include <intrin.h>
 #else
 #include <intrin0.h>
 #endif
+#if defined(_M_ARM64)
+#pragma intrinsic(__umulh)
+#else
 #pragma intrinsic(_umul128)
 #endif
+#endif
 
 RAPIDJSON_NAMESPACE_BEGIN
 namespace internal {
diff --git a/Source/ThirdParty/rapidjson/internal/diyfp.h b/Source/ThirdParty/rapidjson/internal/diyfp.h
index 1530c22e0..eec14b4ac 100644
--- a/Source/ThirdParty/rapidjson/internal/diyfp.h
+++ b/Source/ThirdParty/rapidjson/internal/diyfp.h
@@ -21,15 +21,19 @@
 
 #include "../rapidjson.h"
 
-#if defined(_MSC_VER) && defined(_M_AMD64)
+#if defined(_MSC_VER) && (defined(_M_AMD64) || defined(_M_ARM64))
 #if _MSC_VER <= 1900
 #include <intrin.h>
 #else
 #include <intrin0.h>
 #endif
 #pragma intrinsic(_BitScanReverse64)
+#if defined(_M_ARM64)
+#pragma intrinsic(__umulh)
+#else
 #pragma intrinsic(_umul128)
 #endif
+#endif
 
 RAPIDJSON_NAMESPACE_BEGIN
 namespace internal {
diff --git a/Source/ThirdParty/rapidjson/rapidjson.h b/Source/ThirdParty/rapidjson/rapidjson.h
index ddc22d7ac..8a49e6067 100644
--- a/Source/ThirdParty/rapidjson/rapidjson.h
+++ b/Source/ThirdParty/rapidjson/rapidjson.h
@@ -236,7 +236,7 @@
 #    define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
 #  elif defined(__i386__) || defined(__alpha__) || defined(__ia64) || defined(__ia64__) || defined(_M_IX86) || defined(_M_IA64) || defined(_M_ALPHA) || defined(__amd64) || defined(__amd64__) || defined(_M_AMD64) || defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) || defined(__bfin__)
 #    define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
-#  elif defined(_MSC_VER) && defined(_M_ARM)
+#  elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
 #    define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
 #  elif defined(RAPIDJSON_DOXYGEN_RUNNING)
 #    define RAPIDJSON_ENDIAN