Check if processor is arm64

Question

Is there a simple Objective-C IF statement that can be written to check if the processor in an iOS device is arm64?

The reason that this is needed is that some Core Audio code written for 32-bit architectures is crashing for arm64. It seems that replacing Int16 references with Int32 may resolve it, but I need an IF statement to determine the processor type to determine which to use.

It could be done just by looking for specific device types, but a processor type check seems like a more elegant and future-proofed solution.

Answer 1

There no official way to get this information, but you can compare pointer's size to get this it during the runtime:

if (sizeof(void*) == 4) {
    NSLog(@"32-bit app");
} else if (sizeof(void*) == 8) {
    NSLog(@"64-bit app");
}