• confuzzled (18/18) Jul 04 Good day all,
• confuzzled (12/25) Jul 04 Got it:

confuzzled <con fuzzled.com> writes:

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

confuzzled <con fuzzled.com> writes:

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.