Zilog Z16F2810 - Manual (Page 204)

XOR Instruction UM018809-0611
188
ZNEO
®
CPU Core
User Manual
XOR
Definition
Logical Exclusive OR
Syntax
XOR dst, src
Operation
dst
dst XOR src
Description
The source operand value is logically exclusive-ORed with the destination operand. An XOR
operation stores a 1 in a destination operand bit when the original destination bit differs from the
corresponding source operand bit; otherwise XOR stores a 0. The contents of the source operand
are unaffected. Table 23 summarizes the XOR operation.
Flags
Table 23. Truth Table for XOR
dst src Result (dst)
0 0 0
1 0 1
0 1 1
1 1 0
7 6 5 4 3 2 1 0
C Z S V B CIRQE IRQE
– * * 0 * – – –
Legend
Z = Set to 1 if the result is zero; otherwise, set to 0.
S = Set to 1 if the result msb is 1; otherwise set to 0.
V = Cleared to 0.
B = Set to 1 if the initial destination or source value is 0; otherwise set to 0.
CIRQE = No change.
IRQE = No change.