Zilog Z16F2810 Manual de usuario Pagina 204

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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)
00 0
10 1
01 1
11 0
76543210
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.
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