Comparison and Branching

cmp  eax, 10   ; compute eax - 10, set flags, discard result
test eax, eax  ; AND eax with itself, set flags (is it zero?)

je   label     ; jump if equal      (ZF=1)
jne  label     ; jump if not equal  (ZF=0)
jg   label     ; jump if greater    (signed)
jl   label     ; jump if less       (signed)
ja   label     ; jump if above      (unsigned)
jmp  label     ; unconditional jump

• cmp/test set flags; the jcc that follows reads them.
• test eax, eax + je is the classic "if (x == 0)" check.
• Signed (jg/jl) vs unsigned (ja/jb) reveals the C variable's signedness.