add ci build parallelism & cross platform intrinsics

.github/workflows/build.yml

@@ -10,7 +10,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2022, ubuntu-24.04, macos-14]
+        include:
+          - os: windows-2022
+            build_parallel: 4
+          - os: ubuntu-24.04
+            build_parallel: 2
+          - os: macos-14
+            build_parallel: 2
     env:
       BUILD_TYPE: Release
     steps:
@@ -37,8 +43,8 @@ jobs:
 
     - name: Build
       run: |
-        cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }} -DVTIL_BUILD_TESTS=ON
-        cmake --build build --config ${{ env.BUILD_TYPE }} --parallel
+        cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=${{ env.BUILD_TYPE }} -DVTIL_BUILD_TESTS=ON -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON
+        cmake --build build --config ${{ env.BUILD_TYPE }} --parallel ${{ matrix.build_parallel }} --verbose
 
     - name: Test
       run: |

VTIL-Common/util/intrinsics.hpp

@@ -57,16 +57,32 @@
     #define unreachable() __assume(0)
     #define FUNCTION_NAME __FUNCSIG__
 #else
-    #include <emmintrin.h>
+    #if defined(__i386__) || defined(__x86_64__)
+        #include <emmintrin.h>
+    #endif
+
     #define unreachable() __builtin_unreachable()
     #define __forceinline __attribute__((always_inline))
     #define _AddressOfReturnAddress() ((void*)__builtin_frame_address(0))
     #define FUNCTION_NAME __PRETTY_FUNCTION__
 
+    // _mm_pause is x86-specific; provide a lightweight fallback on other targets.
+    #if !defined(__i386__) && !defined(__x86_64__)
+        __forceinline static void _mm_pause()
+        {
+            #if defined(__aarch64__) || defined(__arm__)
+                __asm__ __volatile__("yield");
+            #else
+                __asm__ __volatile__("" ::: "memory");
+            #endif
+        }
+    #endif
+
     // Declare _?mul128
     //
     __forceinline static uint64_t _umul128( uint64_t _Multiplier, uint64_t _Multiplicand, uint64_t* _HighProduct )
     {
+#if defined(__x86_64__)
         uint64_t LowProduct;
         uint64_t HighProduct;
 
@@ -76,10 +92,16 @@
 
         *_HighProduct = HighProduct;
         return LowProduct;
+#else
+        unsigned __int128 product = (unsigned __int128) _Multiplier * (unsigned __int128) _Multiplicand;
+        *_HighProduct = (uint64_t) ( product >> 64 );
+        return (uint64_t) product;
+#endif
     }
 
     __forceinline static int64_t _mul128( int64_t _Multiplier, int64_t _Multiplicand, int64_t* _HighProduct )
     {
+#if defined(__x86_64__)
         int64_t LowProduct;
         int64_t HighProduct;
 
@@ -89,6 +111,11 @@
 
         *_HighProduct = HighProduct;
         return LowProduct;
+#else
+        __int128 product = (__int128) _Multiplier * (__int128) _Multiplicand;
+        *_HighProduct = (int64_t) ( product >> 64 );
+        return (int64_t) product;
+#endif
     }
 
     // Declare _?mulh

VTIL-Tests/main.cpp

@@ -1,2 +1,7 @@
+#if defined(__linux__)
+// on some glibc toolchains SIGSTKSZ is not a constant expression...
+#define DOCTEST_CONFIG_NO_POSIX_SIGNALS
+#endif
+
 #define DOCTEST_CONFIG_IMPLEMENT_WITH_MAIN
 #include "doctest.h"