Refactor cpuid

include/xsimd/config/xsimd_config.hpp

@@ -33,6 +33,17 @@
  * @defgroup xsimd_config_macro Instruction Set Detection
  */
 
+/**
+ * @ingroup xsimd_config_macro
+ *
+ * Set to 1 if the target is the x86 architecture family.
+ */
+#if defined(__x86_64__) || defined(__i386__) || defined(_M_AMD64) || defined(_M_IX86)
+#define XSIMD_TARGET_X86 1
+#else
+#define XSIMD_TARGET_X86 0
+#endif
+
 /**
  * @ingroup xsimd_config_macro
  *