AMD RDNA 1.0 Instruction Set Architecture


Last updated on 5 August 2019: published revision of document.

This document describes the environment, organization and program state of AMD “RDNA” Generation devices. It details the instruction set and the microcode formats native to this family of processors that are accessible to programmers and compilers.
The document specifies the instructions (include the format of each type of instruction) and the relevant program state (including how the program state interacts with the instructions). Some instruction fields are mutually dependent; not all possible settings for all fields are legal. This document specifies the valid combinations.

The main purposes of this document are to:

1. Specify the language constructs and behavior, including the organization of each type of instruction in both text syntax and binary format.
2. Provide a reference of instruction operation that compiler writers can use to maximize performance of the processor.


This document is intended for programmers writing application and system software, including operating systems, compilers, loaders, linkers, device drivers, and system utilities. It assumes that programmers are writing compute-intensive parallel applications (streaming applications) and assumes an understanding of requisite programming practices.


This document begins with an overview of the AMD RDNA processors’ hardware and programming environment (Chapter 1).
Chapter 2 describes the organization of RDNA programs.
Chapter 3 describes the program state that is maintained.
Chapter 4 describes the program flow.
Chapter 5 describes the scalar ALU operations.
Chapter 6 describes the vector ALU operations.
Chapter 7 describes the scalar memory operations.
Chapter 8 describes the vector memory operations.
Chapter 9 provides information about the flat memory instructions.
Chapter 10 describes the data share operations.
Chapter 11 describes exporting the parameters of pixel color and vertex shaders.
Chapter 12 describes instruction details, first by the microcode format to which they belong, then in alphabetic order.
Finally, Chapter 13 provides a detailed specification of each microcode format.