#ifdef HAVE_ARCH_X86_64_SUPPORT
  
  #define MEMCPY_FN(fn, name, desc)		\
  	extern void *fn(void *, const void *, size_t);
  
  #include "mem-memcpy-x86-64-asm-def.h"
  
  #undef MEMCPY_FN
  
  #endif