Comparing two QWORDs

[NoCforMe]

Another rookie question (from a non-rookie, no less):
Is this the correct way to do an unsigned comparison between two QWORD items in regular MASM (no SSE, MMX or other fancy stuff)?

Code: [Select]

Item1 LABEL QWORD
  Item1Hi DD ?
  Item1Lo DD ?

Item2 LABEL QWORD
  Item2Hi DD ?
  Item2Lo DD ?

;***** Compare the two (unsigned):  *****

; Compare the high DWORDs first:
MOV EDX, Item1Hi
CMP EDX, Item2Hi
JA bigger
JB smaller

; They're equal, so compare the low DWORDs:
MOV EAX, Item1Lo
CMP EAX, Item2Lo
JA bigger
JB smaller

;***** They're equal here ...

bigger:

smaller:


[NoCforMe]

OK, figured it out. The answer is yes.