Copyright © 2013-2017 ARM Limited or its affiliates. All rights reserved.
ARM DDI 0487C.a (ID121917)
ARM
®
Architecture Reference Manual
ARMv8, for ARMv8-A architecture profile
Printed on: December 19, 2017
ii Copyright © 2013-2017 ARM Limited or its affiliates. All rights reserved. ARM DDI 0487C.a
Non-Confidential ID121917
ARM Architecture Reference Manual
ARMv8, for ARMv8-A architecture profile
Copyright © 2013-2017 ARM Limited or its affiliates. All rights reserved.
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30 April 2013 A.a-1 Confidential-Beta Draft Beta draft of first issue, limited circulation
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18 July 2014 A.c Non-Confidential Beta Third beta release.
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25 March 2015 A.f Non-Confidential Beta Sixth beta release.
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31 March 2017 B.a Non-Confidential v8.1 EAC, v8.2 Beta Initial release incorporating ARMv8.1 and ARMv8.2.
26 September 2017 B.b Non-Confidential v8.2 EAC Initial v8.2 EAC release, incorporating SPE.
20 December 2017 C.a Non-Confidential v8.3 EAC Initial v8.3 EAC release.
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iv Copyright © 2013-2017 ARM Limited or its affiliates. All rights reserved. ARM DDI 0487C.a
Non-Confidential ID121917
ARM DDI 0487C.a Copyright © 2013-2017 ARM Limited or its affiliates. All rights reserved. v
ID121917 Non-Confidential
Contents
ARM Architecture Reference Manual ARMv8, for
ARMv8-A architecture profile
Preface
About this manual ..................................................................................................... xvi
Using this manual .................................................................................................... xviii
Conventions ............................................................................................................ xxiv
Additional reading ................................................................................................... xxvi
Feedback ............................................................................................................... xxvii
Part A ARMv8 Architecture Introduction and Overview
Chapter A1 Introduction to the ARMv8 Architecture
A1.1 About the ARM architecture ................................................................................ A1-32
A1.2 Architecture profiles ............................................................................................ A1-34
A1.3 ARMv8 architectural concepts ............................................................................ A1-36
A1.4 Supported data types .......................................................................................... A1-40
A1.5 Advanced SIMD and floating-point support ......................................................... A1-50
A1.6 The ARM memory model .................................................................................... A1-56
A1.7 ARMv8 architecture extensions .......................................................................... A1-57
Part B The AArch64 Application Level Architecture
Chapter B1 The AArch64 Application Level Programmers’ Model
B1.1 About the Application level programmers’ model ................................................ B1-76
B1.2 Registers in AArch64 Execution state ................................................................. B1-77
B1.3 Software control features and EL0 ...................................................................... B1-82
