IWMMXT_SIZE
unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
#define IWMMXT_STORAGE_SIZE (IWMMXT_SIZE + 8)
return copy_to_user(ufp, &thread->fpstate.iwmmxt, IWMMXT_SIZE)
return copy_from_user(&thread->fpstate.iwmmxt, ufp, IWMMXT_SIZE)