Versatile Packed Data Compare Processor Instruction
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Solution Overview
Problem
Conventional packed compare instructions in processors can only perform a single type of comparison operation across all data elements, limiting flexibility and efficiency in operations that require multiple types of comparisons.
Innovation Solution
The introduction of versatile packed data compare instructions that allow different comparison operations to be specified for each pair of data elements, enabling multiple types of comparisons to be performed simultaneously through a single instruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional packed compare instructions are used to perform multiple types of comparisons, then each comparison type requires a separate instruction, but this increases the number of instructions and conditional jumps needed
Solution Approach 1:
The packed compare instruction is enhanced to perform multiple types of comparison operations (greater than, less than, equal to, not equal to, greater than or equal to, less than or equal to) within a single instruction. The comparison operation type is specified by bits in the instruction encoding itself, allowing one universal instruction to replace multiple specialized instructions and reduce instruction sequence complexity.
Solution Approach 2:
Different comparison operations can be applied to different data element positions within the same packed data operand. Each data element position can have its own comparison operation type specified, allowing localized customization of comparison behavior without requiring separate instructions for each position.
2Productivity
If conventional packed compare instructions perform a single comparison type across all data elements, then the instruction is simple to execute, but this reduces processing efficiency for operations requiring multiple comparison types
Solution Approach 1:
The instruction encoding incorporates fields that specify different comparison operation types for different data element positions. This allows the single instruction to perform multiple comparison types simultaneously across different positions, improving processing efficiency without requiring multiple separate instructions.
Solution Approach 2:
The packed data operand is divided into multiple data elements, and each data element position can have its own comparison operation type specified independently. This segmentation allows different comparison operations to be applied to different segments of the data, enabling efficient parallel processing of multiple comparison types.
Data Source
AI summary
A processor including a decode unit to decode a versatile packed data compare instruction to indicate a first source packed data operand to include a first plurality of data elements, a second source packed data operand to include a second plurality of corresponding data elements. The instruction to indicate a source comparison operation indication operand to include comparison operation indicators each to indicate a potentially different comparison operation for a different corresponding pair of data elements from the first and second source operands. An execution unit, in response to the instruction, to store a result in a destination storage location indicated by the instruction. Result to include result indicators each to correspond to a different one of the comparison operation indicators. Each result indicator to indicate a result of a comparison operation, indicated by the corresponding comparison operation indicator, performed on the corresponding pair of data elements.