Fix SIMD on MSVC (#639)

CMakeLists.txt

@@ -239,6 +239,11 @@ endif()
 if(NOT MSVC OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND NOT DISABLE_SSE4 AND HOST_X64)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -msse4.1")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.1")
+elseif(MSVC AND NOT DISABLE_SSE4)
+    # Tell our SIMD code to use SSE4.1 by defining the relevant macros.
+    # Clang defines these macros, MSVC does not.
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /D__SSE3__ /D__SSE4_1__")
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D__SSE3__ /D__SSE4_1__")
 endif()
 
 if(ENABLE_RENDERDOC_API)

include/helpers.hpp

@@ -4,7 +4,6 @@
 #include <cstdint>
 #include <iostream>
 #include <iterator>
-#include <sstream>
 #include <string>
 #include <vector>
 #include <memory>
@@ -162,19 +161,6 @@ namespace Helpers {
 		return std::bit_cast<To, From>(from);
 	}
 #endif
-
-	static std::vector<std::string> split(const std::string& s, const char c) {
-		std::istringstream tmp(s);
-		std::vector<std::string> result(1);
-
-		while (std::getline(tmp, *result.rbegin(), c)) {
-			result.emplace_back();
-		}
-
-		// Remove temporary slot
-		result.pop_back();
-		return result;
-	}
 };  // namespace Helpers
 
 // UDLs for memory size values

src/core/crypto/aes_engine.cpp

@@ -2,7 +2,10 @@
 
 #include <fstream>
 #include <iostream>
+#include <sstream>
+#include <string>
 #include <tuple>
+#include <vector>
 
 #include "helpers.hpp"
 
@@ -15,6 +18,19 @@ namespace Crypto {
 			return;
 		}
 
+		auto splitString = [](const std::string& s, const char c) -> std::vector<std::string> {
+			std::istringstream tmp(s);
+			std::vector<std::string> result(1);
+
+			while (std::getline(tmp, *result.rbegin(), c)) {
+				result.emplace_back();
+			}
+
+			// Remove temporary slot
+			result.pop_back();
+			return result;
+		};
+
 		while (!file.eof()) {
 			std::string line;
 			std::getline(file, line);
@@ -24,7 +40,7 @@ namespace Crypto {
 				continue;
 			}
 
-			const auto parts = Helpers::split(line, '=');
+			const auto parts = splitString(line, '=');
 			if (parts.size() != 2) {
 				Helpers::warn("Keys: Failed to parse %s", line.c_str());
 				continue;