ABB 57520001-DX/1 DSTC 406 processor module

The field-definition tables that accompany the descriptions in the sections below use the following notation. • int(2) - A two-bit field that specifies an unsigned integer value. • enum(7) - A seven-bit field that specifies an enumerated set of values (in this case, a set of up to 27 values). The number of valid values can be less than the maximum. The default value of all fields is zero. Any bitfield not identified is assumed to be reserved. Instruction Suffixes Most instructions include a suffix which indicates the data type the instruction handles. This suffix may also include a number which indicate the size of the data. For example: "F32" indicates "32-bit floating point data", or "B16" is "16-bit binary data".

Description

 This is a scalar instruction with one 16-bit signed immediate (SIMM16) input and a single destination. Instructions which take 2 inputs use the destination as the second input.This is a scalar instruction with two inputs which are compared and produce SCC as a result. Can be followed by a 32-bit literal constant.Vector instruction taking two inputs and producing a comparison result. Can be followed by a 32- bit literal constant. Vector Comparison operations are divided into three groups: • those which can use any one of 16 comparison operations, • those which can use any one of 8, and • those which have only a single comparison operation.

Comparison Operations

The final opcode number is determined by adding the base for the opcode family plus the offset from the compare op. Compare instructions write a result to VCC (for VOPC) or an SGPR (for VOP3). Additionally, every compare instruction has a variant that writes to the EXEC mask instead of VCC or SGPR. The destination of the compare result is VCC or EXEC when encoded using the VOPC format, and can be an arbitrary SGPR when only encoded in the VOP3 format.Vector ALU format with three operands and a scalar result. This encoding is used only for a few opcodes. This encoding allows specifying a unique scalar destination, and is used only for the opcodes listed below. All other opcodes use VOP3A

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