file without use third-party file register.
Then, this is my answer
movf a, w
xorwf b, w
xorwf a, f
xorwf b, f
to proof
A xor B = C
C xor A = B
C xor B = A
[MCU]exchange in PIC
Today, the teacher ask us to implenting exchanging the contents of two
file without use third-party file register.
file without use third-party file register.
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my teacher's method is
ReplyDeletemovf a, w
subwf b, w
addwf a, f
subwf b, f
to proof
W = B - A
B = A + W
A = B - W