__HAIKU_ARCH_PHYSICAL_BITS
#if __HAIKU_ARCH_BITS >= __HAIKU_ARCH_PHYSICAL_BITS
#ifndef __HAIKU_ARCH_PHYSICAL_BITS
#if __HAIKU_ARCH_PHYSICAL_BITS == 32
#elif __HAIKU_ARCH_PHYSICAL_BITS == 64
#if __HAIKU_ARCH_BITS >= __HAIKU_ARCH_PHYSICAL_BITS
#define B_HAIKU_PHYSICAL_BITS __HAIKU_ARCH_PHYSICAL_BITS