19      - bits 0-3: wavefront id
20      - bits 4-23: workgroup id (+1, so never zero)
44   /* Dim(0) is the workgroup ID; range 0 to maybe thousands.  in __gcn_thread_id()
45      Dim(1) is the wavefront ID; range 0 to 15.  */  in __gcn_thread_id()
53   int id = __gcn_thread_id ();  in __gcn_lock_acquire_int()  local
57   __builtin_sprintf (buf,"acquire:%p(%d) lock_value:0x%x  id:0x%x", lock_ptr,  in __gcn_lock_acquire_int()
58 		     _try, *lock_ptr, id);  in __gcn_lock_acquire_int()
63   while (!__atomic_compare_exchange_n (lock_ptr, &expected, id, 0,  in __gcn_lock_acquire_int()
77   __builtin_sprintf (buf,"acquired:%p(%d) lock_value:0x%x  id:0x%x", lock_ptr,  in __gcn_lock_acquire_int()
78 		     _try, *lock_ptr, id);  in __gcn_lock_acquire_int()
100   int id = __gcn_thread_id ();  in __gcn_lock_acquire_recursive_int()  local
104   __builtin_sprintf (buf,"acquire recursive:%p(%d) lock_value:0x%x  id:0x%x",  in __gcn_lock_acquire_recursive_int()
105 		     lock_ptr, _try, *lock_ptr, id);  in __gcn_lock_acquire_recursive_int()
110   if ((lock_value & 0xffffff) == id)  in __gcn_lock_acquire_recursive_int()
115       lock_value = ((count + 1) << 24) | id;  in __gcn_lock_acquire_recursive_int()
120 			 "increment recursive:%p(%d) lock_value:0x%x  id:0x%x",  in __gcn_lock_acquire_recursive_int()
121 			 lock_ptr, _try, *lock_ptr, id);  in __gcn_lock_acquire_recursive_int()
148   __builtin_sprintf (buf,"release:%p lock_value:0x%x  id:0x%x", lock_ptr,  in __gcn_lock_release()
159   int id = __gcn_thread_id ();  in __gcn_lock_release_recursive()  local
164   __builtin_sprintf (buf, "release recursive:%p lock_value:0x%x  id:0x%x",  in __gcn_lock_release_recursive()
165 		     lock_ptr, lock_value, id);  in __gcn_lock_release_recursive()
170   assert ((lock_value & 0xffffff) == id);  in __gcn_lock_release_recursive()
176       lock_value = ((count - 1) << 24) | id;  in __gcn_lock_release_recursive()
180       __builtin_sprintf (buf, "decrement recursive:%p lock_value:0x%x  id:0x%x",  in __gcn_lock_release_recursive()
181 			 lock_ptr, *lock_ptr, id);  in __gcn_lock_release_recursive()