About this book

This book is for the Cortex-A55 core Advanced SIMD and floating-point support.

Product revision status

The rmpn identifier indicates the revision status of the product described in this book, for example, r1p2, where:

rmIdentifies the major revision of the product, for example, r1.
pnIdentifies the minor revision or modification status of the product, for example, p2.

Intended audience

This manual is for system designers, system integrators, and programmers who are designing or programming a System-on-Chip (SoC) that uses the Cortex®-A55 core with the optional Advanced SIMD and floating-point support.

Using this book

This book is organized into the following chapters:

Chapter 1 Functional description

This chapter introduces the optional Advanced SIMD and floating-point support.

Chapter 2 AArch64 Register Descriptions

This chapter describes the AArch64 registers for the Cortex®-A55 core Advanced SIMD and floating-point support.

Chapter 3 AArch32 Register Descriptions

This chapter describes the AArch32 registers for the Cortex®-A55 core Advanced SIMD and floating-point support.

Appendix A Revisions

This appendix describes the technical changes between released issues of this book.

Glossary

The Arm® Glossary is a list of terms used in Arm documentation, together with definitions for those terms. The Arm Glossary does not contain terms that are industry standard unless the Arm meaning differs from the generally accepted meaning.

See the Arm® Glossary for more information.

Typographic conventions

italic
Introduces special terminology, denotes cross-references, and citations.
bold
Highlights interface elements, such as menu names. Denotes signal names. Also used for terms in descriptive lists, where appropriate.
monospace
Denotes text that you can enter at the keyboard, such as commands, file and program names, and source code.
monospace
Denotes a permitted abbreviation for a command or option. You can enter the underlined text instead of the full command or option name.
monospace italic
Denotes arguments to monospace text where the argument is to be replaced by a specific value.
monospace bold
Denotes language keywords when used outside example code.
<and>
Encloses replaceable terms for assembler syntax where they appear in code or code fragments. For example:
MRC p15, 0, <Rd>, <CRn>, <CRm>, <Opcode_2>
SMALL CAPITALS
Used in body text for a few terms that have specific technical meanings, that are defined in the Arm® Glossary. For example, IMPLEMENTATION DEFINED, IMPLEMENTATION SPECIFIC, UNKNOWN, and UNPREDICTABLE.

Additional reading

This book contains information that is specific to this product. See the following documents for other relevant information.

Arm publications
  • Arm® Architecture Reference Manual Armv8, for Armv8-A architecture profile (DDI 0487)
  • Arm® Cortex®-A55 Core Technical Reference Manual (100442)

The following confidential documents are only available to licensees:

  • Arm® Cortex®-A55 Core Integration Manual (100445)
  • Arm® Cortex®-A55 Core Configuration and Sign-off Guide (100443)
  • Arm® Cortex®-A55 Core Cryptographic Extension Technical Reference Manual (100444)
Other publications
  • ANSI/IEEE Std 754-2008, IEEE Standard for Floating-Point Arithmetic.
Non-ConfidentialPDF file icon PDF version100446_0200_00_en
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