EQUAL:     ZF=1

NOT EQUAL: ZF=0

ABOVE:     CF=0 ZF=0
BELOW:     CF=1 ZF=0

GREATER:   ZF=0 SF=OF
LESSER:    SF<>OF

1 = MSB of first (dest) arg
2 = MSB of second (src) arg
c = carry flag

o = overflow flag
s = sign flag

1 2 C | O S
------------
0 0 0 | 0 0
0 0 1 | 0 1
0 1 0 | N/A THIS STATE IS IMPOSSIBLE
0 1 1 | 1 1
1 0 0 | 1 0
1 0 1 | N/A THIS STATE IS IMPOSSIBLE
1 1 0 | 0 0
1 1 1 | 0 1


THE ABOVE TABLE CAN BE REDUCED TO THIS IF WE DO NOT
INTEND TO USE THESE INSTRUCTIONS:

JO JNO JS JNS

1 2 C | S
------------
0 0 0 | 0
0 0 1 | 1
0 1 1 | 0
1 0 0 | 1
1 1 0 | 0
1 1 1 | 1

(1 == 2)(C) + 

C(12 + !1!2) + 1!2!C
!1!2C + 1!2!C + 12C


if (cf)
	if (1 == 2) {
		sf=1
	}
} else {
	if (1)
		if (!2)
			sf=1
}

if ((1 == 2 && CF) || !CF) sf=1