--- a/gcc/config/i386/mm3dnow.h	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/config/i386/mm3dnow.h	Fri Oct 27 22:46:09 2017 +0900
@@ -1,4 +1,4 @@
-/* Copyright (C) 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2004-2017 Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -27,9 +27,18 @@
 #ifndef _MM3DNOW_H_INCLUDED
 #define _MM3DNOW_H_INCLUDED
 
-#ifdef __3dNOW__
+#include <mmintrin.h>
+#include <prfchwintrin.h>
 
-#include <mmintrin.h>
+#if defined __x86_64__ && !defined __SSE__ || !defined __3dNOW__
+#pragma GCC push_options
+#ifdef __x86_64__
+#pragma GCC target("sse,3dnow")
+#else
+#pragma GCC target("3dnow")
+#endif
+#define __DISABLE_3dNOW__
+#endif /* __3dNOW__ */
 
 extern __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 _m_femms (void)
@@ -157,12 +166,6 @@
   __builtin_prefetch (__P, 0, 3 /* _MM_HINT_T0 */);
 }
 
-extern __inline void __attribute__((__gnu_inline__, __always_inline__, __artificial__))
-_m_prefetchw (void *__P)
-{
-  __builtin_prefetch (__P, 1, 3 /* _MM_HINT_T0 */);
-}
-
 extern __inline __m64 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 _m_from_float (float __A)
 {
@@ -177,7 +180,20 @@
   return __tmp.a[0];
 }
 
-#ifdef __3dNOW_A__
+#ifdef __DISABLE_3dNOW__
+#undef __DISABLE_3dNOW__
+#pragma GCC pop_options
+#endif /* __DISABLE_3dNOW__ */
+
+#if defined __x86_64__ && !defined __SSE__ || !defined __3dNOW_A__
+#pragma GCC push_options
+#ifdef __x86_64__
+#pragma GCC target("sse,3dnowa")
+#else
+#pragma GCC target("3dnowa")
+#endif
+#define __DISABLE_3dNOW_A__
+#endif /* __3dNOW_A__ */
 
 extern __inline __m64 __attribute__((__gnu_inline__, __always_inline__, __artificial__))
 _m_pf2iw (__m64 __A)
@@ -209,7 +225,9 @@
   return (__m64)__builtin_ia32_pswapdsf ((__v2sf)__A);
 }
 
-#endif /* __3dNOW_A__ */
-#endif /* __3dNOW__ */
+#ifdef __DISABLE_3dNOW_A__
+#undef __DISABLE_3dNOW_A__
+#pragma GCC pop_options
+#endif /* __DISABLE_3dNOW_A__ */
 
 #endif /* _MM3DNOW_H_INCLUDED */