movn

Move Not

MOVN <Wd>, #<imm16> {, lsl #<shift>}

Moves inverted 16-bit immediate to register.

Pseudocode Operation

shift_amount ← hw × 16
mask ← 0xFFFF ≪ shift_amount
Wd ← (Wd ∧ ¬mask) ∨ ((¬imm16) ≪ shift_amount)

Example

MOVN w0, #16

Encoding

Binary Layout

0

31

00

30:29

100101

28:23

hw

22:21

imm16

20:5

Rd

4:0

 

Format Data Processing

Opcode 0x12800000

Extension Base

Operands

• Wd
  Destination 32-bit integer register
• imm16
  Imm
• shift
  Shift amount

Related

More in Base

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0x12800000	MOVN <Wd>, #<imm>{, LSL #<shift>}		A64		0 | 00 | 100101 | hw | imm16 | Rd
0x92800000	MOVN <Xd>, #<imm>{, LSL #<shift>}		A64		1 | 00 | 100101 | hw | imm16 | Rd

Description

Move wide with NOT moves the inverse of an optionally-shifted 16-bit immediate value to a register.

Operation

bits(datasize) result;

result = Zeros(datasize);

result<pos+15:pos> = imm16;
result = NOT(result);
X[d, datasize] = result;