The source and destination operands are exclusively ORed. The result is placed into the destination. The source operand is not affected. The previous content of the destination is lost.
Status Bits
N:
Set if result is negative (MSB = 1), reset if positive (MSB = 0)
Z:
Set if result is zero, reset otherwise
C:
Set if result is not zero, reset otherwise (C = .not. Z)
V:
Set if both operands are negative before execution, reset otherwise
Mode Bits
OSCOFF, CPUOFF, and GIE are not affected.
Example
Toggle bits in word CNTR (16-bit data) with information (bit = 1) in address-word TONI. Both operands are located in lower 64 K.
XOR &TONI,&CNTR ; Toggle bits in CNTR
Example
A table word pointed to by R5 (20-bit address) is used to toggle bits in R6. R6.19:16 = 0.
XOR @R5,R6 ; Toggle bits in R6
Example
Reset to zero those bits in the low byte of R7 that are different from the bits in byte EDE. R7.19:8 = 0. The address of EDE is within PC ± 32 K.
XOR.B EDE,R7 ; Set different bits to 1 in R7.
INV.B R7 ; Invert low byte of R7, high byte is 0h