 RealView Assembler User's Guide | |
| Home Products Events Support | |
Technical Support
On-Line Manuals
RealView Assembler User's Guide
Preface Introduction Writing ARM Assembly Language
Introduction Overview of the ARM architecture Architecture versions ARM, Thumb, Thumb‑2, and Thumb‑2EE instruction ARM, Thumb, and ThumbEE state Processor mode Registers Instruction set overview Instruction capabilities Structure of assembly language modules Layout of assembly language source files An example ARM assembly language module Calling subroutines Conditional execution The ALU status flags Conditional execution Using conditional execution Example of the use of conditional execution The Q flag Loading constants into registers Direct loading with MOV and MVN Loading with MOV32 Loading with LDR Rd, =const Loading addresses into registers Direct loading with ADR and ADRL Loading addresses with LDR Rd, =label Load and store multiple register instructions Load and store multiple instructions available in Implementing stacks with LDM and STM Block copy with LDM and STM Using macros Test‑and‑branch macro example Unsigned integer division macro example Using frame directives Assembly language changes Assembler Reference ARM and Thumb Instructions Directives ReferenceLoading with MOV32
  | |||
  |  | ||
| |||
| Home > Writing ARM Assembly Language > Loading constants into registers > Loading with MOV32 | |||
In ARMv6T2, both ARM and Thumb‑2 instruction sets include:
a
MOVinstruction that can load any value in the range0x00000000to0x0000FFFFinto a registera
MOVTinstruction that can load any value in the range0x0000to0xFFFFinto the most significant half of a register, without altering the contents of the least significant half.
You can use these two instructions to construct any 32‑bit constant in a register. Alternatively, you can use the MOV32 pseudo‑instruction. The assembler generates the MOV, MOVT instruction pair for you. See MOV32 pseudo‑instruction for a description of the syntax of the MOV32 pseudo‑instruction.
| Copyright © 2007 ARM Limited. All rights reserved. | ARM DUI 0379A |
 PDF version | |
| Home > Writing ARM Assembly Language > Loading constants into registers > Loading with MOV32 | |
| |
| Contact Site Map Press Privacy | Copyright © 2008 Keil™, An ARM® Company. All rights reserved. |
