Status Register (SREG) and Boolean Formula

S

N ⊕ V, for signed tests.

V

0

Cleared.

N

R7

Set if MSB of the result is set; cleared otherwise.

Z

R7 • R6 • R5 • R4 • R3 • R2 • R1 • R0

Set if the result is $00; cleared otherwise.

R (Result) equals Rd.

Example:

 tst r0 ; Test r0
 breq zero ; Branch if r0=0
 ... 
zero: nop ; Branch destination (do nothing)

Words

1 (2 bytes)

Cycles

1