SX User’s Manual Rev. 3.1 126 © 2000 Scenix Semiconductor, Inc. All rights reserved. www.scenix.com Chapter 3 Instruction Set 3.6.55    XOR fr,W XOR of fr and W into fr Operation: fr = fr ^ W Bits affected: Z Opcode: 0001 101f ffff Description: This instruction performs a bitwise exclusive OR of the contents of the specified file
register and W, and writes the 8-bit result into the same file register. W is left un-
changed. If the result is 00h, the Z bit is set. Cycles: 1 Example: xor $10,W ;perform logical XOR and overwrite fr This example performs a bitwise logical XOR of the working register W with a
value stored in file register 10h. The result is written back to the file register 10h. For example, suppose that the file register 10h is loaded with the value 0Fh and W
contains the value 13h. The instruction takes the logical XOR of 0Fh and 13h and
writes the result, 1Ch, into the same file register. The result is nonzero, so the Z bit
is cleared.