Intel 210200-002 manual Xorcx, Bx

XOR

EXCLUSIVE OR XOR

Encoding:

Memory or Register Operand with Register Operand:

10 0 11 0 0 d w 1mod reg rIm 1

if d = 1 then LSRC = REG, RSRC = EA, DEST = REG else LSRC = EA, RSRC = REG, DEST = EA

Immediate Operand to Memory or Register Operand:

11 000000 w 1mod 11 0 rIm 1 data data if w=1

LSRC = EA, RSRC = data, DEST = EA

Immediate Operand to Accumulator:

10 0 1 1 0 1 0 w 1 data 1 data if w=1 I

if w = 0 then LSRC = AL, RSRC = data, DEST = AL else LSRC = AX, RSRC = data, DEST = AX

XOR Operands	Clocks·	Transfers	Bytes	XOR Coding Example
register, register	3	-	2	XORCX, BX
register, memory	9(13)+ EA	1	2-4	XOR Cl, MASK_BYTE
memory, register	16(24)+ EA	2	2-4	XOR ALPHA [SI], DX
accumulator, immediate	4	-	2-3	XOR Al, 01000010B
register, immediate	4	-	3-4	XOR SI, 00C2H
memory, immediate	17(25) + EA	2	3-6	XOR RETURN_CODE, OD2H

*b(w): where b denotes the number of clock cycles for byte operands and w denotes the number of clock cycles for word operands.

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