1  #if defined (__ia64__) || defined (__s390__) || defined (__s390x__)
       2  #define NOP "nop 0"
       3  #elif defined (__MMIX__)
       4  #define NOP "swym 0"
       5  #elif defined (__or1k__)
       6  #define NOP "l.nop"
       7  #else
       8  #define NOP "nop"
       9  #endif