Vector Reverse Instruction for DSP Data Reversal
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Solution Overview
Problem
Modern digital signal processors (DSPs) face inefficiencies due to the need for multiple cycles to reverse the order of data elements for algorithms like autocorrelation, leading to computational overhead.
Innovation Solution
A processor is designed with a vector reverse instruction that allows for a single operation to reverse the order of data elements within a vector, reducing the computational overhead by executing the reversal in a single operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data elements are reversed using multiple cycles in conventional DSPs, then the reversal operation can be completed, but computational overhead increases and processing efficiency decreases
Solution Approach 1:
The processor architecture divides the vector reverse operation into dedicated functional units that can operate independently and in parallel, segmenting the reversal task from other computational operations to enable single-cycle execution
Solution Approach 2:
The processor performs preliminary configuration of the datapath and functional units to enable the vector reverse operation to execute in a single cycle without requiring multiple sequential cycles, preparing all necessary components in advance
Data Source
AI summary
Processors and methods reverse source data in response to a vector reverse instruction. In an implementation, a processor comprises an instruction fetch unit; and a datapath that includes a register file that includes a source register and a destination register; and a set of functional units. The instruction fetch unit receives a vector reverse instruction that specifies a single vector reverse operation to be executed in a single operation. The vector reverse instruction also specifies a first functional unit from among a set of functional units, and based on the vector reverse instruction, the first functional unit receives the first vector from a source register; reverses an order of a set of elements of a first vector stored in the source register to produce a second vector; and causes the second vector to be stored in a destination register.