Determine if iOS device is 32- or 64-bit

Question

Does anyone know of an easy way to tell if an iOS7 device has 32- or 64-bit hardware? I don\'t mean programmatically, I just mean via settings, model number, 3rd-party app,

Answer 1

Totally untested, but you should be able to get the CPU via sysctl like this:

#include 
#include 
#include 

void foo() {
    size_t size;
    cpu_type_t type;

    size = sizeof(type);
    sysctlbyname("hw.cputype", &type, &size, NULL, 0);

    if (type == CPU_TYPE_ARM64) {
        // ARM 64-bit CPU
    } else if (type == CPU_TYPE_ARM) {
        // ARM 32-bit CPU
    } else {
        // Something else.
    }
}

In the iOS 7 SDK, CPU_TYPE_ARM64 is defined in as:

#define CPU_TYPE_ARM64          (CPU_TYPE_ARM | CPU_ARCH_ABI64)

A different way seems to be:

#include 

void foo() {
    host_basic_info_data_t hostInfo;
    mach_msg_type_number_t infoCount;

    infoCount = HOST_BASIC_INFO_COUNT;
    host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo, &infoCount);

    if (hostInfo.cpu_type == CPU_TYPE_ARM64) {
        // ARM 64-bit CPU
    } else if (hostInfo.cpu_type == CPU_TYPE_ARM) {
        // ARM 32-bit CPU
    } else {
        // Something else.
    }
}