Processor Instruction Execution via System Management Mode Simulation
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Solution Overview
Problem
Implementing new instructions on previous generation processors without modifying their microarchitecture is challenging, as it requires significant design and testing efforts, leading to high costs.
Innovation Solution
A method and system that involve receiving an instruction, determining if it's new, storing basic decoding information in a private register, and simulating its execution in system management mode, allowing new instructions to be supported without altering the processor's microarchitecture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If new instructions are implemented on previous generation processors by modifying the microarchitecture, then the processor can support new instructions, but the design and testing workload increases significantly and costs become extremely high
Solution Approach 1:
The patent introduces a translation layer (microcode translator or emulator) that acts as an intermediary between new instructions and the old processor microarchitecture. This translator converts new instructions into equivalent sequences of old instructions, allowing the processor to execute new instructions without modifying its core microarchitecture. The translation layer handles the complexity of instruction mapping, preserving the original processor design while enabling support for new instruction sets.
Solution Approach 2:
The patent creates a virtual copy or simulation of the new processor's instruction execution environment within the old processor. Instead of physically modifying the old processor's microarchitecture to match the new design, the system replicates the new instruction behavior through software-based emulation or microcode interpretation. This copying approach allows the old hardware to exhibit new functional capabilities without structural changes.
2Adaptability or versatility
If the microarchitecture of previous generation processors is modified to support new instructions, then new instructions can be executed, but design and testing work and costs become extremely high
Solution Approach 1:
The patent performs instruction translation and compatibility mapping in advance, before the processor needs to execute new instructions. Translation tables, microcode mappings, or emulator configurations are pre-computed and stored, allowing the processor to quickly translate new instructions during runtime without performing complex analysis or modification operations on the fly. This preliminary preparation eliminates the need for time-consuming design and testing iterations.
Solution Approach 2:
The patent creates virtual models or simulations of the new instruction set behavior that can be tested independently of the physical processor hardware. Software-based emulators or instruction translators allow comprehensive testing of new instructions in a virtual environment, eliminating the need for costly and time-consuming physical prototype iterations and hardware re-spins during the design phase.
3Productivity
If new instructions are added to subsequent generation processors, then processing capabilities are enhanced, but implementing them on previous generation processors requires microarchitecture modification which is costly
Solution Approach 1:
The patent introduces a software-based translation intermediary that bridges the gap between enhanced new instructions and the limitations of older processor hardware. This intermediary layer (translator or emulator) enables old processors to execute new instruction sequences by converting them into compatible operations, allowing productivity enhancements from new instructions without requiring expensive hardware re-manufacturing or microarchitecture redesign of existing processors.
Solution Approach 2:
The patent makes the old processor universally compatible with multiple instruction sets through software translation capabilities. By implementing a translation layer that can handle both original and new instructions, the processor gains multi-functionality, allowing it to execute code designed for newer architectures while maintaining its original hardware design. This universality eliminates the need to manufacture different hardware versions for different instruction sets.
Data Source
AI summary
A method for executing new instructions includes receiving an instruction, and determining whether the received instruction is a new instruction according to an operation code of the received instruction. When the received instruction is a new instruction, the basic decoding information of the received instruction is stored in a private register. And, the system for executing the new instructions enters a system management mode, and simulates the execution of the received instruction according to the basic decoding information stored in the private register in the system management mode; wherein the basic decoding information includes the operation code.