Volume 3: General-Purpose and System Instructions - Stanford ...

24594 Rev. 3.10 February 2005 AMD64 TechnologyMnemonic Opcode DescriptionCMPS mem8, mem8CMPS mem16, mem16CMPS mem32, mem32CMPS mem64, mem64CMPSBCMPSWCMPSDCMPSQRelated InstructionsCMP, SCASxA6A7A7A7A6A7A7A7Compare the byte at DS:rSI with the byte at ES:rDI and thenincrement or decrement rSI and rDI.Compare the word at DS:rSI with the word at ES:rDI and thenincrement or decrement rSI and rDI.Compare the doubleword at DS:rSI with the doubleword atES:rDI and then increment or decrement rSI and rDI.Compare the quadword at DS:rSI with the quadword at ES:rDIand then increment or decrement rSI and rDI.Compare the byte at DS:rSI with the byte at ES:rDI and thenincrement or decrement rSI and rDI.Compare the word at DS:rSI with the word at ES:rDI and thenincrement or decrement rSI and rDI.Compare the doubleword at DS:rSI with the doubleword atES:rDI and then increment or decrement rSI and rDI.Compare the quadword at DS:rSI with the quadword at ES:rDIand then increment or decrement rSI and rDI.CMPSQ 111