Single Instruction Bit Operation Logic Unit
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Solution Overview
Problem
Existing memory management schemes require multiple instructions and processor cycles to fetch and update memory segments, leading to slow execution due to the need to find, clear, and multiply bit positions, which is inefficient for valid data segment identification.
Innovation Solution
A single instruction, FFVMAUV, is introduced that combines the operations of finding the first set bit, multiplying its position by a factor, and updating the bit value within a single clock cycle, utilizing a RISC processor with integrated logic units to perform these operations efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional three-instruction sequence is used to find and update memory segment, then operation completeness is ensured, but processor cycles increase and execution speed decreases
Solution Approach 1:
The patent combines three separate instructions (find first set bit, clear the bit, multiply position) into a single integrated instruction that performs all operations atomically in one clock cycle, eliminating the sequential execution overhead and improving productivity
Solution Approach 2:
The new instruction serves multiple functions simultaneously: it identifies the first set bit position, clears that bit, calculates the memory segment address through multiplication, and updates the information vector all in one operation, reducing the total number of processor cycles required
2Ease of operation
If multiple instructions are used to perform bit operations, then operational accuracy is maintained, but device complexity increases
Solution Approach 1:
Multiple separate instructions are merged into a single compound instruction that performs find, clear, and multiply operations together, simplifying the instruction sequence and making memory management operations more straightforward
Data Source
AI summary
A method and a device having a plurality of bit operations capability, the device includes: a first and a second registers and an instruction fetch circuit, and an arithmetic logic unit adapted to: calculate, during a first clock cycle, a position value representative of a position, within a first information vector, of a first bit of information that has a first value; and to multiply the position value by a multiplication factor to provide a first result and to alter the value of the first bit to a second value to provide an updated information vector, during the first clock cycle.