1 Reply Latest reply on Jun 19, 2011 7:01 AM by avk

    Size Attribute of Count Register in LOOP Instruction

    Tapejara

      According to the AMD64 manuals:

       

       

      "The size of the count register used (CX, ECX, or RCX) depends on the address-size attribute of the LOOP

      cc instruction."





      What does this mean? In 32-bit environments is this aways ECX?