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

On 7/5/25 1:06 AM, confuzzled wrote:
> 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;
> }

Got it:

ulong rdtsc() {
    ulong result;
    asm {
        rdtsc;  // Puts result in edx:eax
        mov [result], EAX; // Low 32 bits
        mov [result + 4], EDX; // High 32 bits
    }
    return result;
}

Thanks.