【汇编指令】数据处理指令之逻辑指令

发布时间：2020-12-14 02:53:36 所属栏目：大数据来源：网络整理

导读：逻辑指令集有：AND/ORR/EOR/BIC 1)与逻辑指令一般用于置零某位：AND AND Logical AND operation. Syntax ? AND{cond}{S}? Rd,Rn, Op2 Description ? Load Rd with logical AND of Rn with Op2. Rd := Rn AND Op2 Condition Flags ? If S is specified,N,Z fl

逻辑指令集有：AND/ORR/EOR/BIC

1)与逻辑指令一般用于置零某位：AND

AND

Logical AND operation.

Syntax	?	AND{cond}{S}? Rd,Rn, Op2
Description	?	Load Rd with logical AND of Rn with Op2. Rd := Rn AND Op2
Condition Flags	?	If S is specified,N,Z flags are updated. C flag may be updated by calculation of Op2.
Example	?	AND R9,R2,#0xFF00 // Load R9 with R2 and value in 0xFF00

2)逻辑或指令：ORR(或逻辑一般用于某位的置 1 )

ORR

Logical OR operation.

Syntax	?	ORR{cond}{S}? Rd, Op2
Description	?	OR operations on the values in Rn and Op2.
Condition Flags	?	If S is specified,Z flags are updated. C flag may be updated by calculation of Op2.
Example	?	ORR R2,R0,R5 // Rd = R0 or R5

3）比较指令：CMP ?/ ? ?CMN ? ?/TST ? / ? TEQ

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