ARM Cortex-M4 - Movt

The Cortex-M4 Instruction Set
ARM DUI 0553A Copyright © 2010 ARM. All rights reserved. 3-52
ID121610 Non-Confidential
3.5.7 MOVT
Move Top.
Syntax
MOVT{cond} Rd, #imm16
where:
cond Is an optional condition code, see Conditional execution on page 3-18.
Rd Specifies the destination register.
imm16 Is a 16-bit immediate constant.
Operation
MOVT writes a 16-bit immediate value, imm16 , to the top halfword, Rd [31:16], of its destination
register. The write does not affect
Rd [15:0].
The
MOV , MOVT instruction pair enables you to generate any 32-bit constant.
Restrictions
Rd must not be SP and must not be PC.
Condition flags
This instruction does not change the flags.
Examples
MOVT R3, #0xF123 ; Write 0xF123 to upper halfword of R3, lower halfword
; and APSR are unchanged.