Determines if the current user-address space is 64-bit or not.
#include <sys/types.h>
#include <sys/user.h>
int IS64U
The IS64U kernel service returns 1 if the current user-address space is 64-bit. It returns 0 otherwise.
The IS64U kernel service can be called from a process or interrupt handler environment. In either case, it will operate only on the current user-address space.
| 0 | The current user-address space is 32-bits. |
| 1 | The current user-address space is 64-bits. |
The as_att64 kernel service.
Memory Kernel Services and Understanding Virtual Memory Manager Interfaces in AIX Version 6.1 Kernel Extensions and Device Support Programming Concepts.