Disable X86-64 detection macro for Arm64 emulation on MSVC (#3540)

NVIDIA · Jan 31, 2025 · f2e769d · f2e769d
1 parent ca007c9
commit f2e769d
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/libcudacxx/include/cuda/std/__cccl/architecture.h b/libcudacxx/include/cuda/std/__cccl/architecture.h
@@ -26,7 +26,9 @@
 #endif
 
 // X86 64-bit
-#if defined(_M_X64) || defined(__amd64__) || defined(__x86_64__)
+
+// _M_X64 is defined even if we are compiling in Arm64 emulation mode
+#if (defined(_M_X64) && !defined(_M_ARM64EC)) || defined(__amd64__) || defined(__x86_64__)
 #  define _CCCL_ARCH_X86_64_() 1
 #else
 #  define _CCCL_ARCH_X86_64_() 0