CI: build windows clang-cl

.ci/build-windows-clang-cl.ps1

@@ -0,0 +1,139 @@
+# .ci/build-windows-clang-cl.ps1
+# Enable strict error handling
+$ErrorActionPreference = "Stop"
+
+trap {
+    Write-Host "ERROR: $($_.Exception.Message)"
+    exit 1
+}
+
+Write-Host "Starting RPCS3 build (PowerShell script)"
+
+# Automatically find clang_rt.builtins-x86_64.lib
+Write-Host "Searching for clang_rt.builtins-x86_64.lib ..."
+$clangBuiltinsLibPath = Get-ChildItem -Path "C:/Program Files/LLVM/lib/clang" -Recurse -Filter "clang_rt.builtins-x86_64.lib" -ErrorAction SilentlyContinue |
+    Where-Object { $_.FullName -match "windows\\clang_rt\.builtins-x86_64\.lib$" } |
+    Select-Object -First 1
+
+if (-not $clangBuiltinsLibPath) {
+    Write-Error "Could not find clang_rt.builtins-x86_64.lib in LLVM installation."
+    exit 1
+}
+function Get-ShortPath([string]$path) {
+    $fso = New-Object -ComObject Scripting.FileSystemObject
+    return $fso.GetFolder($path).ShortPath
+}
+
+$clangBuiltinsDir = Split-Path -Parent $clangBuiltinsLibPath.FullName
+$clangBuiltinsDirShort = Get-ShortPath $clangBuiltinsDir
+$clangBuiltinsLib = Split-Path -Leaf $clangBuiltinsLibPath.FullName
+$clangPath = "C:/Program Files/LLVM/bin"
+
+Write-Host "Found Clang builtins library: $clangBuiltinsLib in $clangBuiltinsDir or short $clangBuiltinsDirShort"
+
+# Get Windows Kits root from registry
+$kitsRoot = Get-ItemProperty -Path "HKLM:\SOFTWARE\Microsoft\Windows Kits\Installed Roots" -Name "KitsRoot10"
+$kitsRootPath = $kitsRoot.KitsRoot10
+
+# Search for mt.exe in x64 SDK bin directories
+Write-Host "Searching for mt.exe ..."
+$mtPath = Get-ChildItem -Path "$kitsRootPath\bin" -Recurse -Filter "mt.exe" -ErrorAction SilentlyContinue |
+    Where-Object { $_.FullName -match "\\x64\\mt\.exe$" } |
+    Sort-Object FullName -Descending |
+    Select-Object -First 1
+
+if (-not $mtPath) {
+    Write-Error "Could not find mt.exe in Windows Kits directories."
+    exit 1
+}
+
+$mtExePath = $mtPath.FullName
+
+Write-Host "Found mt.exe at: $mtExePath"
+
+$VcpkgRoot="$(Get-Location)/vcpkg"
+$VcpkgTriplet=$env:VCPKG_TRIPLET
+$VcpkgInclude="$VcpkgRoot/installed/$VcpkgTriplet/include"
+$VcpkgLib="$VcpkgRoot/installed/$VcpkgTriplet/lib"
+
+# Configure git safe directory
+Write-Host "Configuring git safe directory"
+& git config --global --add safe.directory '*'
+
+# Initialize submodules except certain ones
+Write-Host "Initializing submodules"
+$excludedSubs = @('llvm','opencv','ffmpeg','FAudio','zlib','libpng','feralinteractive')
+
+# Get submodule paths excluding those in $excludedSubs
+$submodules = Select-String -Path .gitmodules -Pattern 'path = (.+)' | ForEach-Object {
+    $_.Matches[0].Groups[1].Value
+} | Where-Object {
+    $path = $_
+    -not ($excludedSubs | Where-Object { $path -like "*$_*" })
+}
+
+Write-Host "Updating submodules: $($submodules -join ', ')"
+& git submodule update --init --quiet $submodules
+
+# Create and enter build directory
+Write-Host "Creating build directory"
+if (!(Test-Path build)) {
+    New-Item -ItemType Directory -Path build | Out-Null
+}
+Set-Location build
+Write-Host "Changed directory to: $(Get-Location)"
+
+# Run CMake with Ninja generator and required flags
+Write-Host "Running CMake configuration"
+& cmake .. `
+    -G Ninja `
+    -DCMAKE_BUILD_TYPE=Release `
+    -DCMAKE_C_COMPILER="$clangPath/clang-cl.exe" `
+    -DCMAKE_CXX_COMPILER="$clangPath/clang-cl.exe" `
+    -DCMAKE_LINKER="$clangPath/lld-link.exe" `
+    -DCMAKE_INSTALL_PREFIX=/usr `
+    -DCMAKE_TOOLCHAIN_FILE="$VcpkgRoot/scripts/buildsystems/vcpkg.cmake" `
+    -DCMAKE_EXE_LINKER_FLAGS="/LIBPATH:$clangBuiltinsDirShort /defaultlib:$clangBuiltinsLib" `
+    -DCMAKE_MT="$mtExePath" `
+    -DUSE_NATIVE_INSTRUCTIONS=OFF `
+    -DUSE_PRECOMPILED_HEADERS=OFF `
+    -DVCPKG_TARGET_TRIPLET="$VcpkgTriplet" `
+    -DFFMPEG_INCLUDE_DIR="$VcpkgInclude" `
+    -DFFMPEG_LIBAVCODEC="$VcpkgLib/avcodec.lib" `
+    -DFFMPEG_LIBAVFORMAT="$VcpkgLib/avformat.lib" `
+    -DFFMPEG_LIBAVUTIL="$VcpkgLib/avutil.lib" `
+    -DFFMPEG_LIBSWSCALE="$VcpkgLib/swscale.lib" `
+    -DFFMPEG_LIBSWRESAMPLE="$VcpkgLib/swresample.lib" `
+    -DUSE_SYSTEM_CURL=OFF `
+    -DUSE_FAUDIO=OFF `
+    -DUSE_SDL=ON `
+    -DUSE_SYSTEM_SDL=OFF `
+    -DUSE_SYSTEM_FFMPEG=ON `
+    -DUSE_SYSTEM_OPENCV=ON `
+    -DUSE_SYSTEM_OPENAL=OFF `
+    -DUSE_SYSTEM_LIBPNG=ON `
+    -DUSE_DISCORD_RPC=ON `
+    -DOpenGL_GL_PREFERENCE=LEGACY `
+    -DWITH_LLVM=ON `
+    -DSTATIC_LINK_LLVM=ON `
+    -DBUILD_RPCS3_TESTS=OFF `
+    -DRUN_RPCS3_TESTS=OFF
+Write-Host "CMake configuration complete"
+
+# Build with ninja
+Write-Host "Starting build with Ninja..."
+& ninja
+if ($LASTEXITCODE -ne 0) {
+    Write-Host "Build failed with exit code $LASTEXITCODE"
+    exit 1
+}
+
+Write-Host "Build succeeded"
+
+# Go back to root directory
+Set-Location ..
+Write-Host "Returned to root directory: $(Get-Location)"
+
+# Deploy if build succeeded
+Write-Host "Running deployment script"
+& .ci/deploy-windows-clang-cl.sh x86_64

.ci/deploy-windows-clang-cl.sh

@@ -0,0 +1,29 @@
+#!/bin/sh -ex
+
+cd build || exit 1
+
+CPU_ARCH="${1:-x86_64}"
+
+echo "Deploying rpcs3 windows clang-cl $CPU_ARCH"
+
+# BUILD_blablabla is CI specific, so we wrap it for portability
+ARTIFACT_DIR=$(cygpath -u "$BUILD_ARTIFACTSTAGINGDIRECTORY")
+
+# Prepare compatibility and SDL database for packaging
+mkdir ./bin/config
+mkdir ./bin/config/input_configs
+curl -fsSL 'https://raw.githubusercontent.com/gabomdq/SDL_GameControllerDB/master/gamecontrollerdb.txt' 1> ./bin/config/input_configs/gamecontrollerdb.txt
+curl -fsSL 'https://rpcs3.net/compatibility?api=v1&export' | iconv -t UTF-8 1> ./bin/GuiConfigs/compat_database.dat
+
+# Package artifacts
+7z a -m0=LZMA2 -mx9 "$BUILD" ./bin/*
+
+# Generate sha256 hashes
+# Write to file for GitHub releases
+sha256sum "$BUILD" | awk '{ print $1 }' | tee "$BUILD.sha256"
+echo "$(cat "$BUILD.sha256");$(stat -c %s "$BUILD")B" > GitHubReleaseMessage.txt
+
+# Move files to publishing directory
+mkdir -p "$ARTIFACT_DIR"
+cp -- "$BUILD" "$ARTIFACT_DIR"
+cp -- "$BUILD.sha256" "$ARTIFACT_DIR"

.github/workflows/rpcs3.yml

@@ -5,8 +5,6 @@ defaults:
     shell: bash
 on:
   push:
-    branches:
-      - master # Only trigger push event on 'master' branch
   pull_request:
   workflow_dispatch:
 
@@ -404,6 +402,106 @@ jobs:
           compression-level: 0
           if-no-files-found: error
 
+  Windows_Build_ClangCL:
+    if: always()
+    name: RPCS3 Windows Clang-CL
+    runs-on: windows-2025
+    strategy:
+      matrix:
+        include:
+          - compiler: clangcl
+            arch: win64
+    env:
+      CCACHE_DIR: 'C:\ccache'
+      VCPKG_TRIPLET: x64-windows-release
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@main
+        with:
+          fetch-depth: 0
+
+      - name: Clone vcpkg
+        run: git clone https://github.com/microsoft/vcpkg.git
+
+      - name: Bootstrap vcpkg
+        shell: pwsh
+        run: .\vcpkg\bootstrap-vcpkg.bat
+
+      - name: Restore vcpkg cache
+        uses: actions/cache/restore@main
+        id: restore-vcpkg-cache
+        with:
+          path: |
+            vcpkg/installed
+            vcpkg/buildtrees
+          key: vcpkg-${{ runner.os }}-${{ matrix.compiler }}-${{ runner.arch }}-${{ github.run_id }}
+          restore-keys: vcpkg-${{ runner.os }}-${{ matrix.compiler }}-${{ runner.arch }}-
+
+      - name: Install dependencies with vcpkg
+        shell: pwsh
+        run: |
+          .\vcpkg\vcpkg.exe install `
+            ffmpeg[avcodec,avformat,swscale,swresample] `
+            llvm `
+            opencv `
+            qtbase `
+            qtsvg `
+            qtmultimedia `
+            zlib `
+            vulkan `
+            libpng `
+            --triplet $env:VCPKG_TRIPLET `
+            --clean-after-build
+
+      - name: Save vcpkg cache
+        if: github.ref == 'refs/heads/master'
+        uses: actions/cache/save@main
+        with:
+          path: |
+            vcpkg/installed
+            vcpkg/buildtrees
+          key: ${{ steps.restore-vcpkg-cache.outputs.cache-primary-key }}
+
+      - name: Add LLVM and Ninja to PATH
+        shell: pwsh
+        run: |
+          Add-Content -Path $env:GITHUB_PATH -Value "C:\Program Files\LLVM\bin"
+          Add-Content -Path $env:GITHUB_PATH -Value "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Current\Bin"
+          Add-Content -Path $env:GITHUB_PATH -Value "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\IDE\CommonExtensions\Microsoft\CMake\CMake\bin"
+          Add-Content -Path $env:GITHUB_PATH -Value "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\Common7\IDE\CommonExtensions\Microsoft\CMake\Ninja"
+
+      - name: Restore build Ccache
+        uses: actions/cache/restore@main
+        id: restore-build-ccache
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ${{ runner.os }}-ccache-${{ matrix.compiler }}-${{ runner.arch }}-${{ github.run_id }}
+          restore-keys: ${{ runner.os }}-ccache-${{ matrix.compiler }}-${{ runner.arch }}-
+
+      - name: Setup CI Variables
+        run: .ci/setup-windows-ci-vars.sh ${{ matrix.arch }} ${{ matrix.compiler }}
+
+      - name: Build RPCS3
+        shell: cmd
+        run: |
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" amd64
+          powershell -ExecutionPolicy Bypass -File .ci/build-windows-clang-cl.ps1
+
+      - name: Save build Ccache
+        if: github.ref == 'refs/heads/master'
+        uses: actions/cache/save@main
+        with:
+          path: ${{ env.CCACHE_DIR }}
+          key: ${{ steps.restore-build-ccache.outputs.cache-primary-key }}
+
+      - name: Upload artifacts
+        uses: actions/upload-artifact@main
+        with:
+          name: RPCS3 for Windows (clang-cl)
+          path: ${{ env.BUILD_ARTIFACTSTAGINGDIRECTORY }}
+          compression-level: 0
+          if-no-files-found: error
+
   FreeBSD_Build:
       # Only run push event on master branch of main repo, but run all PRs
     if: github.event_name != 'push' || (github.repository == 'RPCS3/rpcs3' && github.ref_name == 'master')

3rdparty/llvm/CMakeLists.txt

@@ -58,9 +58,14 @@ if(WITH_LLVM)
 	else()
 		message(STATUS "Using prebuilt or system LLVM")
 
-		if (LLVM_DIR AND NOT IS_ABSOLUTE "${LLVM_DIR}")
+		if (LLVM_DIR)
+			message(STATUS "LLVM_DIR: ${LLVM_DIR}")
+
+			if (NOT IS_ABSOLUTE "${LLVM_DIR}")
 				# change relative LLVM_DIR to be relative to the source dir
 				set(LLVM_DIR ${CMAKE_SOURCE_DIR}/${LLVM_DIR})
+				message(STATUS "Changed LLVM_DIR to relative path: ${LLVM_DIR}")
+			endif()
 		endif()
 
 		find_package(LLVM CONFIG)

3rdparty/opencv/CMakeLists.txt

@@ -4,7 +4,11 @@ set(OPENCV_TARGET 3rdparty_dummy_lib PARENT_SCOPE)
 
 if (USE_SYSTEM_OPENCV)
 	message(STATUS "RPCS3: using system OpenCV")
+	find_package(OpenCV CONFIG COMPONENTS core photo)
+
+	if(NOT OPENCV_FOUND)
 		find_package(OpenCV COMPONENTS core photo)
+	endif()
 	
 	if(OPENCV_FOUND)
 		message(STATUS "RPCS3: found system OpenCV")

3rdparty/wolfssl/CMakeLists.txt

@@ -22,5 +22,17 @@ else()
 
 	add_subdirectory(wolfssl EXCLUDE_FROM_ALL)
 
-	target_compile_definitions(wolfssl PUBLIC WOLFSSL_DES_ECB HAVE_WRITE_DUP FP_MAX_BITS=8192 WOLFSSL_NO_OPTIONS_H)
+	target_compile_definitions(wolfssl PUBLIC WOLFSSL_DES_ECB HAVE_WRITE_DUP WOLFSSL_NO_OPTIONS_H)
+
+	if(MSVC AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+		# Disable 128-bit Math
+		set(WOLFSSL_ASM ON CACHE BOOL "" FORCE)
+		set(WOLFSSL_FAST_MATH OFF CACHE BOOL "" FORCE)
+		target_compile_definitions(wolfssl PUBLIC WOLFSSL_SP_NO_128BIT FP_MAX_BITS=4096)
+
+		# Disable warnings
+		target_compile_options(wolfssl PRIVATE /w)
+	else()
+		target_compile_definitions(wolfssl PUBLIC FP_MAX_BITS=8192)
+	endif()
 endif()

CMakeLists.txt

@@ -116,8 +116,10 @@ if(MSVC)
             message(AUTHOR_WARNING "Debug build currently can not work with static CRT.")
         endif()
     endif()
+    if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
         add_compile_options(/MP)
     endif()
+endif()
 
 if(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
     message( FATAL_ERROR "RPCS3 can only be compiled on 64-bit platforms." )

Utilities/StrFmt.cpp

@@ -525,7 +525,7 @@ void fmt_class_string<u128>::format(std::string& out, u64 arg)
 		return;
 	}
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 	fmt::append(out, "0x%016llx%016llx", num.hi, num.lo);
 #else
 	fmt::append(out, "0x%016llx%016llx", static_cast<u64>(num >> 64), static_cast<u64>(num));

buildfiles/cmake/ConfigureCompiler.cmake

@@ -1,11 +1,20 @@
 # Check and configure compiler options for RPCS3
 
 if(MSVC)
+	if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+		check_cxx_compiler_flag("-msse -msse2 -mcx16" COMPILER_X86)
+		if (COMPILER_X86)
+			add_compile_options(-msse -msse2 -mcx16 -mavx -mavx2 -mavx512f -mavx512vbmi -mavx512vl -mavx512dq -mavx512vpopcntdq -maes -mrtm -mpclmul -mmwaitx -mwaitpkg)
+		endif()
+		add_link_options(/dynamicbase)
+	else()
 		add_compile_options(/Zc:throwingNew- /constexpr:steps16777216)
+		add_link_options(/DYNAMICBASE)
+	endif()
+
 	add_compile_definitions(
 		_CRT_SECURE_NO_DEPRECATE=1 _CRT_NON_CONFORMING_SWPRINTFS=1 _SCL_SECURE_NO_WARNINGS=1
 		NOMINMAX _ENABLE_EXTENDED_ALIGNED_STORAGE=1 _HAS_EXCEPTIONS=0)
-	add_link_options(/DYNAMICBASE)
 
 	#TODO: Some of these could be cleaned up
 	add_compile_options(/wd4805) # Comparing boolean and int

rpcs3/Crypto/aesni.cpp

@@ -197,6 +197,21 @@ void aesni_gcm_mult( unsigned char c[16],
                      const unsigned char b[16] )
 {
 #if defined(POLARSSL_HAVE_MSVC_X64_INTRINSICS)
+#ifdef __clang__
+    __m128i xa, xb, m0, m1, x10, x32, r;
+
+    xa[1] = _byteswap_uint64( *((unsigned __int64*)a + 0) );
+    xa[0] = _byteswap_uint64( *((unsigned __int64*)a + 1) );
+    xb[1] = _byteswap_uint64( *((unsigned __int64*)b + 0) );
+    xb[0] = _byteswap_uint64( *((unsigned __int64*)b + 1) );
+
+    clmul256( xa, xb, &m0, &m1 );
+    sll256( m0, m1, &x10, &x32 );
+    r = reducemod128( x10, x32 );
+
+    *((unsigned __int64*)c + 0) = _byteswap_uint64( r[1] );
+    *((unsigned __int64*)c + 1) = _byteswap_uint64( r[0] );
+#else
     __m128i xa, xb, m0, m1, x10, x32, r;
 
     xa.m128i_u64[1] = _byteswap_uint64( *((unsigned __int64*)a + 0) );
@@ -210,6 +225,7 @@ void aesni_gcm_mult( unsigned char c[16],
 
     *((unsigned __int64*)c + 0) = _byteswap_uint64( r.m128i_u64[1] );
     *((unsigned __int64*)c + 1) = _byteswap_uint64( r.m128i_u64[0] );
+#endif
 #else
     unsigned char aa[16], bb[16], cc[16];
     size_t i;

rpcs3/util/asm.hpp

@@ -9,7 +9,7 @@ extern bool g_use_rtm;
 extern u64 g_rtm_tx_limit1;
 
 #ifdef _M_X64
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 extern "C"
 {
 	u32 _xbegin();
@@ -242,7 +242,7 @@ namespace utils
 
 	constexpr u32 popcnt128(const u128& v)
 	{
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 		return popcnt64(v.lo) + popcnt64(v.hi);
 #else
 		return popcnt64(v) + popcnt64(v >> 64);
@@ -274,7 +274,7 @@ namespace utils
 
 	inline s64 div128(s64 high, s64 low, s64 divisor, s64* remainder = nullptr)
 	{
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 		s64 rem = 0;
 		s64 r = _div128(high, low, divisor, &rem);
 
@@ -296,7 +296,7 @@ namespace utils
 
 	inline u64 udiv128(u64 high, u64 low, u64 divisor, u64* remainder = nullptr)
 	{
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 		u64 rem = 0;
 		u64 r = _udiv128(high, low, divisor, &rem);
 
@@ -316,7 +316,7 @@ namespace utils
 		return r;
 	}
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 	inline u128 operator/(u128 lhs, u64 rhs)
 	{
 		u64 rem = 0;
@@ -326,7 +326,7 @@ namespace utils
 
 	constexpr u32 ctz128(u128 arg)
 	{
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 		if (!arg.lo)
 			return std::countr_zero(arg.hi) + 64u;
 		else
@@ -341,7 +341,7 @@ namespace utils
 
 	constexpr u32 clz128(u128 arg)
 	{
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 		if (arg.hi)
 			return std::countl_zero(arg.hi);
 		else
@@ -470,6 +470,6 @@ namespace utils
 
 using utils::busy_wait;
 
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 using utils::operator/;
 #endif

rpcs3/util/types.hpp

@@ -249,13 +249,13 @@ public:
 	}
 };
 
-#if defined(ARCH_X64) && !defined(_MSC_VER)
+#if defined(ARCH_X64) && !defined(_MSC_VER) && !defined(__m128)
 using __m128i = long long __attribute__((vector_size(16)));
 using __m128d = double __attribute__((vector_size(16)));
 using __m128 = float __attribute__((vector_size(16)));
 #endif
 
-#ifndef _MSC_VER
+#if !defined(_MSC_VER) || defined(__clang__)
 using u128 = __uint128_t;
 using s128 = __int128_t;
 #else
@@ -266,8 +266,8 @@ extern "C"
 	union __m128i;
 	struct __m128d;
 
-	uchar _addcarry_u64(uchar, u64, u64, u64*);
+	constexpr uchar _addcarry_u64(uchar, u64, u64, u64*);
-	uchar _subborrow_u64(uchar, u64, u64, u64*);
+	constexpr uchar _subborrow_u64(uchar, u64, u64, u64*);
 	u64 __shiftleft128(u64, u64, uchar);
 	u64 __shiftright128(u64, u64, uchar);
 	u64 _umul128(u64, u64, u64*);
@@ -579,7 +579,7 @@ struct s128 : u128
 // Optimization for u64*u64=u128
 constexpr u128 u128_from_mul(u64 a, u64 b)
 {
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && !defined(__clang__)
 	if (!std::is_constant_evaluated())
 	{
 		u64 hi;