Interact with local variables in asm block

[confuzzled via Digitalmars-d-learn]

Good day all,

What is the proper way to assign to accomplish this?

ulong rdtsc() {
    ulong result;
    uint* res = cast(uint*) &result;
    asm {
        rdtsc;  // Puts result in edx:eax

        // Cast our ulong's address to a 32-bit integer pointer
        // and move the register values into the correct memory locations.
        mov EAX, res[0]; // Low 32 bits
        mov EDX, res[1]; // High 32 bits
    }
    return result;
}

With this implementation, the value returned is always 0.00.

I would appreciate any help I can get.

Thanks,
-- confuzzled