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【汇编指令】数据处理指令之逻辑指令

2024-08-07 03:09:53   223人阅读

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

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


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【汇编指令】数据处理指令之逻辑指令


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