Logical Exclusive Or - Samsung S3C9228 User Manual

SAM88RI INSTRUCTION SET
XOR

— Logical Exclusive OR

XOR dst,src
Operation: dst ¨ dst XOR src
The source operand is logically exclusive-ORed with the destination operand and the result is
stored in the destination. The exclusive-OR operation results in a "1" bit being stored whenever
the corresponding bits in the operands are different; otherwise, a "0" bit is stored.
Flags: C: Unaffected.
Z: Set if the result is "0"; cleared otherwise.
S: Set if the result bit 7 is set; cleared otherwise.
V: Always reset to "0".
D: Unaffected.
H: Unaffected.
Format:
opc
opc
opc
Examples: Given: R0 = 0C7H, R1 = 02H, R2 = 18H, register 00H = 2BH, register 01H = 02H, and register
02H = 23H:
XOR
XOR
XOR
XOR
XOR
In the first example, if working register R0 contains the value 0C7H and if register R1 contains the
value 02H, the statement "XOR R0,R1" logically exclusive-ORs the R1 value with the R0 value
and stores the result (0C5H) in the destination register R0.
6-50
dst | src
src dst
dst src
→
R0,R1
→
R0,@R1
→
00H,01H
→
00H,@01H
→
00H,#54H
Bytes Cycles
2
3
3
R0 = 0C5H, R1 = 02H
R0 = 0E4H, R1 = 02H, register 02H = 23H
Register 00H = 29H, register 01H = 02H
Register 00H = 08H, register 01H = 02H,
register 02H = 23H
Register 00H = 7FH
S3C9228/P9228_UM_REV1.10
Opcode Addr Mode
(Hex) dst
4 B2
6 B3
6 B4
6 B5
6 B6 R
src
r r
r lr
R R
R IR
IM