Status Register (SREG) and Boolean Formula

I T H S V N Z C
H
Rd3
S
N ⊕ V, for signed tests.
V
N ⊕ C, for N and C after the shift.
N

R7

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

Z

R7R6R5R4R3R2R1R0

Set if the result is $00; cleared otherwise.

C

Rd7

Set if, before the shift, the MSB of Rd was set; cleared otherwise.

R (Result) equals Rd after the operation.

Example:

 add r0,r4 ; Add r4 to r0
 lsl r0 ; Multiply r0 by 2
Words
1 (2 bytes)
Cycles
1