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Bitwise Exclusive OR (Register)

EOR <Wd>, <Wn>, <Wm> {, <shift> #<amount>}

XORs two registers.

Pseudocode Operation

Wd ← Wn XOR (Wm << shift_amount)

Example

EOR w0, w1, w2

Encoding

Binary Layout

30:29

01010

28:24

shift

23:22

20:16

imm6

15:10

9:5

4:0

Format Logical (Register)

Opcode 0x4A000000

Extension Base

Operands

Wd
Destination 32-bit integer register
Wn
First source / base 32-bit integer register
Wm
Second source / offset 32-bit integer register

Other forms of eor

eor Bitwise Exclusive OR (Immediate)
eor Vector Bitwise Exclusive OR
eor SVE Bitwise Exclusive OR (Predicated)
eor Exclusive OR (A32)

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction	ISA	Bit pattern
0x2E201C00	EOR <Vd>.<T>, <Vn>.<T>, <Vm>.<T>	A64	0 \| Q \| 1 \| 01110 \| 00 \| 1 \| Rm \| 00011 \| 1 \| Rn \| Rd
0x52000000	EOR <Wd\|WSP>, <Wn>, #<imm>	A64	0 \| 10 \| 100100 \| 0 \| immr \| imms \| Rn \| Rd
0xD2000000	EOR <Xd\|SP>, <Xn>, #<imm>	A64	1 \| 10 \| 100100 \| N \| immr \| imms \| Rn \| Rd
0x4A000000	EOR <Wd>, <Wn>, <Wm>{, <shift> #<amount>}	A64	0 \| 10 \| 01010 \| shift \| 0 \| Rm \| imm6 \| Rn \| Rd
0xCA000000	EOR <Xd>, <Xn>, <Xm>{, <shift> #<amount>}	A64	1 \| 10 \| 01010 \| shift \| 0 \| Rm \| imm6 \| Rn \| Rd
0x25004200	EOR <Pd>.B, <Pg>/Z, <Pn>.B, <Pm>.B	A64	00100101 \| 0 \| 0 \| 00 \| Pm \| 01 \| Pg \| 1 \| Pn \| 0 \| Pd
0x04190000	EOR <Zdn>.<T>, <Pg>/M, <Zdn>.<T>, <Zm>.<T>	A64	00000100 \| size \| 011 \| 00 \| 1 \| 000 \| Pg \| Zm \| Zdn
0x05400000	EOR <Zdn>.<T>, <Zdn>.<T>, #<const>	A64	00000101 \| 0 \| 1 \| 0000 \| imm13 \| Zdn
0x04A03000	EOR <Zd>.D, <Zn>.D, <Zm>.D	A64	00000100 \| 1 \| 0 \| 1 \| Zm \| 001100 \| Zn \| Zd

Description

Bitwise Exclusive-OR (shifted register) performs a bitwise exclusive-OR of a register value and an optionally-shifted register value, and writes the result to the destination register.

Operation

bits(datasize) operand1 = X[n, datasize];
bits(datasize) operand2 = ShiftReg(m, shift_type, shift_amount, datasize);
bits(datasize) result;


result = operand1 EOR operand2;

X[d, datasize] = result;

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