Compare and Jump

A compare is a subtract that does not store its results; however, the results set the condition code register, which can then be tested by jump instructions.

cmpl		S,D		compare D - S , set condition , integer
cmpq		S,D		compare D - S , set condition , pointer
comisd		S,D		compare D - S , set condition , float

Condition code bits:

C	Carry
O	Overflow
<	< 0
=	= 0
>	> 0

The jump instructions test the condition code:

jmp	Jump always.
jle	Jump if D ≤ S
je	Jump if D = S
jne	Jump if D ≠ S
jge	Jump if D ≥ S
jl	Jump if D < S
jg	Jump if D > S