xoris
Exclusive OR Immediate Shifted - 6C 00 00 00
xoris
Instruction Syntax
| Mnemonic | Format | Flags |
| xoris | rA,rS,UIMM | None |
Instruction Encoding
0
1
1
0
1
1
S
S
S
S
S
A
A
A
A
A
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
| Field | Bits | Description |
| Primary Opcode | 0-5 | 011011 (0x1B) |
| rS | 6-10 | Source register |
| rA | 11-15 | Destination register |
| UIMM | 16-31 | Unsigned immediate value (shifted left by 16) |
Operation
rA ← (rS) ⊕ (UIMM << 16)
The exclusive OR of the value in register rS and the unsigned immediate value shifted left by 16 bits is placed into register rA.
Note: The xoris instruction performs bitwise exclusive OR operation with an immediate value that is shifted left by 16 bits.
Affected Registers
General Purpose Registers (GPRs)
- rA (Destination register)
Examples
Basic Exclusive OR Immediate Shifted
xoris r3, r1, 0xFF # r3 = r1 ⊕ (0xFF << 16)
Bit Manipulation
# Toggle high-order bits xoris r3, r3, 0x80 # Toggle bit 23 in r3 (0x80 << 16 = 0x800000)
High-Order Bit Operations
# Set high-order bits xoris r3, r0, 0xFFFF # r3 = 0 ⊕ 0xFFFF0000 = 0xFFFF0000