Chapter 6 Applied Instructions
6-201
API
Instruction code Operand Function
0804
XOR P
S
1
, S
2
, D
Logical exclusive OR operation
Device
X Y M S T C HC D L SM SR E PR K 16#
“$” DF
16-bit instruction (7 steps)
32-bit instruction (7 steps)
Symbol:
S
1
：
Data source 1 Word/Double word
S
2
：
Data source 2 Word/Double word
D
：
Operation result Word/Double word
Explanation:
1. The logical operator XOR takes the binary representations in S
1
and S
2
, and performs the
logical exclusive OR operation on each pair of corresponding bits. The operation result is
stored in D.
2. Only the instruction DXOR can use the 32-bit counter.
3. The result in each position is 1 if the two bits are different, and 0 if they are the same.
Example 1:
When X0.0 is ON, the logical operator XOR takes the data in the 16-bit device Y0 and the 16-bit
device Y2, and performs the exclusive OR operation on each pair of corresponding bits. The
operation result is stored in Y4.
Before the instruction
is executed
A
fter the instruction
is executed
011 0 1 0 1 0 1 0 1
0 1 0 1
0 1
0 0 0 0 1 1 1 1 1 0
1 0 0 1
0 1
b0
b15
Y0
Y2
S1
S2
Y4
0 1 0 1 1 0 1 0 1 1
1 1 0 0
0 0
b0
b15
D
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