movt

Move Top (A32)

MOVT<c> <Rd>, #<imm16>

Writes a 16-bit immediate to the top half of a register.

Pseudocode Operation

imm16 ← imm4 : imm12
Rd[31:16] ← imm16
Rd[15:0] ← Rd[15:0]

Example

MOVT r0, #16

Encoding

Binary Layout

cond

31:28

00110

27:23

1

22

00

21:20

imm4

19:16

Rd

15:12

imm12

11:0

 

Format Data Proc

Opcode 0x03400000

Extension A32 (Base)

Operands

• Rd
  Destination general-purpose register
• imm16
  Value

Related

More in A32 (Base)

Reference

View in Arm A64 ISA Reference ↗ Arm AArch32 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0x03400000	MOVT{<c>}{<q>} <Rd>, #<imm16>		A32		cond | 00110 | 1 | 00 | imm4 | Rd | imm12
0xF2C00000	MOVT{<c>}{<q>} <Rd>, #<imm16>		T32		11110 | i | 10 | 1 | 100 | imm4 | 0 | imm3 | Rd | imm8

Description

Move Top writes an immediate value to the top halfword of the destination register. It does not affect the contents of the bottom halfword.

Operation

if ConditionPassed() then
    EncodingSpecificOperations();
    R[d]<31:16> = imm16;
    // R[d]<15:0> unchanged