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[Stefan]

                        This document describes the environment, organization, and program state of the
                        AMD Southern Islands series of 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 (including 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.