Atmel AVR

3. Conditional Branch Summary
Test Boolean Mnemonic
Complementar
y Boolean Mnemonic Comment
Rd > Rr Z•(N ⊕ V) = 0 BRLT
(1)
Rd ≤ Rr Z+(N ⊕ V) =
1
BRGE* Signed
Rd ≥ Rr (N ⊕ V) = 0 BRGE Rd < Rr (N ⊕ V) = 1 BRLT Signed
Rd = Rr Z = 1 BREQ Rd ≠ Rr Z = 0 BRNE Signed
Rd ≤ Rr Z+(N ⊕ V) = 1 BRGE
(1)
Rd > Rr Z•(N ⊕ V) = 0 BRLT* Signed
Rd < Rr (N ⊕ V) = 1 BRLT Rd ≥ Rr (N ⊕ V) = 0 BRGE Signed
Rd > Rr C + Z = 0 BRLO
(1)
Rd ≤ Rr C + Z = 1 BRSH* Unsigned
Rd ≥ Rr C = 0 BRSH/
BRCC
Rd < Rr C = 1 BRLO/BRCS Unsigned
Rd = Rr Z = 1 BREQ Rd ≠ Rr Z = 0 BRNE Unsigned
Rd ≤ Rr C + Z = 1 BRSH
(1)
Rd > Rr C + Z = 0 BRLO* Unsigned
Rd < Rr C = 1 BRLO/BRCS Rd ≥ Rr C = 0 BRSH/BRCC Unsigned
Carry C = 1 BRCS No carry C = 0 BRCC Simple
Negative N = 1 BRMI Positive N = 0 BRPL Simple
Overflow V = 1 BRVS No overflow V = 0 BRVC Simple
Zero Z = 1 BREQ Not zero Z = 0 BRNE Simple
Note: Interchange Rd and Rr in the operation before the test, i.e., CP Rd,Rr → CP Rr,Rd.
Atmel AVR Instruction Set Manual [OTHER]
Atmel-0856L-AVR-Instruction-Set-Manual_Other-11/2016
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