Logical operations based on ARM9-EEWORLD

Collect

Features of logical operations:
1. Bitwise operation
2. No carry or borrow between bits
3. No distinction between positive and negative numbers and the size of inputs
There are four logical operation instructions:
AND: AND
ORR: OR
EOR: XOR
BIC: Bit clear

The formats of the four instructions are unified as follows:
instruction {condition} {S} destination register Rd, register Rn, operand2
operand2: indicates the specific bit field of Rn to be operated, and saves the final value in Rd;
for example:
ANDS R0, R0, #0x0F; R0=R0&0x0F, take out the lowest 4 bits of data
ANDEQ R2, R1, R3; R2=R1&R3

Keywords：ARM9 Reference address：Logical operations based on ARM9

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