cpuid: avoid directly including x86 specifics

cpuid.hpp

@@ -3,11 +3,12 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  *
- * Copyright 2018 Danny Robson <danny@nerdcruft.net>
+ * Copyright 2018-2019 Danny Robson <danny@nerdcruft.net>
  */
 
-#ifndef CRUFT_UTIL_CPUID_HPP
-#define CRUFT_UTIL_CPUID_HPP
+#pragma once
+
+#include "platform.hpp"
 
 #include <iosfwd>
 
@@ -25,4 +26,17 @@ namespace cruft::cpu {
     operator<< (std::ostream&, const cruft::cpu::base&);
 };
 
+#if defined(PROCESSOR_AMD64)
+#include "cpuid_x86.hpp"
+#else
+#error "Unhandled architecture"
 #endif
+
+
+namespace cruft::cpu {
+#if defined(PROCESSOR_AMD64)
+    using native = x86;
+#else
+#error "Unhandled architecture"
+#endif
+}

cpuid_x86.hpp

@@ -8,7 +8,11 @@
 
 #pragma once
 
-#include "cpuid.hpp"
+#include "platform.hpp"
+
+#if !defined(PROCESSOR_AMD64)
+#error "Wrong architecture"
+#endif
 
 #include <array>
 

tools/cpuid.cpp

@@ -6,7 +6,7 @@
  * Copyright 2018 Danny Robson <danny@nerdcruft.net>
  */
 
-#include "cpuid_x86.hpp"
+#include "cpuid.hpp"
 
 #include <iostream>
 
@@ -14,5 +14,5 @@
 int
 main ()
 {
-    std::cout << cruft::cpu::x86 {} << '\n';
+    std::cout << cruft::cpu::native {} << '\n';
 };