AVR微控制器中的逻辑指令

逻辑指令是执行基本算术运算(例如AND，OR，XOR等)的指令。在AVR微控制器中，目标操作数始终是寄存器。

下表显示了逻辑指令：

Instruction	Operand	Explanation	Example
AND	D, S	D = D AND S Performs a AND operation on the operands and stores the result in the left hand operand	AND D, S
ANDI	D, k(constant)	D = D AND k Performs a AND operation on the operands and stores the result in the left hand operand with the right hand operand being a constant	ANDI D, k
OR	D, S	D = D OR S Performs a OR operation on the operands and stores the result in the left hand operand	OR D, S
ORI	D, k	D = D OR k Performs a OR operation on the operands and stores the result in the left hand operand with the right hand operand being a constant	ORI D, k
EOR	D, S	D = D XOR S Performs a EX-OR operation on the operands and stores the result in the left hand operand	EOR D, S
COM	D.	D = 1’s complement of D The complement action changes ‘1’s to ‘0’s and ‘0’s to ‘1’s	COM D	NEG	D	D = 2’s complement of D This instruction takes the 2’s complement	NEG D
CP	D, S	Compares D and S This instruction is really a subtraction action. The only difference is that the values of registers don’t change	CP D, S
CPI	D, k	Compares D and k The only difference between CP an CPI is that CPI has one of the operands as a constant	CP D, k

笔记 ：
D和S分别是目标和源。两者都是寄存器。 k是一个常数。