Add Windows ARM64/ARM64EC CI workflows

.github/workflows/main.yml

@@ -361,7 +361,7 @@ jobs:
         # Build each combination of OS and release/debug variants
         os: [ windows-2019 ]
         build-type: [ Release, Debug ]
-        arch: [ Win32, x64 ]
+        arch: [ Win32, x64, ARM64, ARM64EC ]
         toolchain: [ "", "-T ClangCL" ]
         extra-cmake-flags: [ "" ]
         # Add an extra check for the Windows 8 compatible PAL
@@ -388,6 +388,24 @@ jobs:
             build-type: Debug
             arch: x64
             toolchain: ""
+          - os: windows-2022
+            build-type: Release
+            arch: ARM64
+            toolchain: ""
+          - os: windows-2022
+            build-type: Debug
+            arch: ARM64
+            toolchain: ""
+          - os: windows-2022
+            build-type: Release
+            arch: ARM64EC
+            toolchain: ""
+            extra-cmake-flags: -DCMAKE_SYSTEM_VERSION="10.0.22621.0"
+          - os: windows-2022
+            build-type: Debug
+            arch: ARM64EC
+            toolchain: ""
+            extra-cmake-flags: -DCMAKE_SYSTEM_VERSION="10.0.22621.0"
 
       # Don't abort runners if a single one fails
       fail-fast: false

src/snmalloc/aal/aal.h

@@ -14,9 +14,11 @@
 #include <cstdint>
 #include <utility>
 
-#if (defined(__i386__) || defined(_M_IX86) || defined(_X86_) || \
+#if ( \
+  defined(__i386__) || defined(_M_IX86) || defined(_X86_) || \
   defined(__amd64__) || defined(__x86_64__) || defined(_M_X64) || \
-  defined(_M_AMD64)) && !defined(_M_ARM64EC)
+  defined(_M_AMD64)) && \
+  !defined(_M_ARM64EC)
 #  if defined(SNMALLOC_SGX)
 #    define PLATFORM_IS_X86_SGX
 #    define SNMALLOC_NO_AAL_BUILTINS
@@ -25,7 +27,8 @@
 #  endif
 #endif
 
-#if defined(__arm__) || defined(__aarch64__) || defined(_M_ARM64) || defined(_M_ARM64EC)
+#if defined(__arm__) || defined(__aarch64__) || defined(_M_ARM64) || \
+  defined(_M_ARM64EC)
 #  define PLATFORM_IS_ARM
 #endif