Is herzergreifend einfach:

BRGE Branch, if S = 0
BRGE Branch, if S = 1

S ist immer N exclusive or V

Ansonsten

SBIC / SBIS SREG, bit

bit 0 = Carry
bit 1 = zero
bit 2 = N-Bit
bit 3 = V-Bit
bit 4 = S-Bit
bit 5 = H-Bit
bit 6 = T-Bit
bit 7 = glob-interrupt enable