# coprocessor

> supplementary computer processor that executes under the logical control of a main processor

**Wikidata**: [Q859595](https://www.wikidata.org/wiki/Q859595)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Coprocessor)  
**Source**: https://4ort.xyz/entity/coprocessor

## Summary
A coprocessor is a supplementary computer processor that operates under the logical control of a main processor. Its primary function is to execute specialized tasks, thereby offloading work from the central processing unit and enhancing overall system performance. Coprocessors are often used for hardware acceleration and heterogeneous computing.

## Key Facts
*   A coprocessor is a supplementary computer processor that executes under the logical control of a main processor.
*   It is classified as a processor type and a subclass of processor.
*   Coprocessors are used for hardware acceleration and heterogeneous computing.
*   They are often part of an expansion card.
*   Aliases for coprocessor include co-processor, accelerator, and hardware accelerator.
*   Examples include floating-point units, AI accelerators, graphics processing units, and cryptographic accelerators.
*   The Super FX, a 3D graphics chip used in Super Nintendo games, was introduced in 1992.
*   The TF-16, a coprocessor for the Forth language, had an inception date of 2004.
*   Blockscale, a crypto-mining accelerator ASIC, had an inception date of June 2022.

## FAQs
### Q: What is a coprocessor?
A: A coprocessor is a supplementary computer processor that operates under the logical control of a main processor. It is designed to handle specific tasks, allowing the main processor to focus on general computing.

### Q: What is the main purpose of a coprocessor?
A: The main purpose of a coprocessor is hardware acceleration and heterogeneous computing. It executes specialized functions, offloading these tasks from the central processing unit to improve overall system efficiency and performance.

### Q: What are some common types or examples of coprocessors?
A: Common types include floating-point units for arithmetic, graphics processing units (GPUs) for graphics, AI accelerators like Tensor Processing Units (TPUs), and cryptographic accelerators for security operations. Specific examples include the Intel 8089 I/O coprocessor and Apple's Secure Enclave.

### Q: Is a coprocessor a type of processor?
A: Yes, a coprocessor is classified as a processor type and is a subclass of a processor. It functions as an additional processing unit alongside the main CPU.

## Why It Matters
Coprocessors are crucial for modern computing because they enable significant performance improvements by specializing in particular tasks. By offloading complex or repetitive computations, such as graphics rendering, artificial intelligence calculations, or cryptographic operations, from the main central processing unit (CPU), coprocessors allow the CPU to handle general-purpose tasks more efficiently. This specialization facilitates hardware acceleration, making systems faster and more responsive for demanding applications. Furthermore, coprocessors are fundamental to heterogeneous computing, where different types of processors work together, each optimized for specific workloads. This architecture is vital for everything from gaming consoles and mobile devices to supercomputers and data centers, driving innovation in fields like AI, scientific research, and multimedia processing.

## Notable For
*   **Specialized Task Execution**: Designed to execute specific, often complex, tasks under the control of a main processor, enabling hardware acceleration.
*   **Heterogeneous Computing**: A key component in systems where different types of processors collaborate, each optimized for particular workloads.
*   **Diverse Applications**: Used across various domains, including graphics (GPUs), artificial intelligence (AI accelerators, TPUs), floating-point arithmetic (FPUs), and cryptography (cryptographic accelerators, secure cryptoprocessors).
*   **Performance Enhancement**: Improves overall system performance by offloading specialized computations from the central processing unit.
*   **Historical Significance**: Early examples like the Intel 8089 and the Super FX chip demonstrated the value of dedicated hardware for specific functions.

## Body

### Definition and Function
A coprocessor is defined as a supplementary computer processor that executes under the logical control of a main processor. Its primary role is to perform specialized tasks, thereby offloading these specific computations from the central processing unit (CPU). This specialization allows for hardware acceleration, significantly improving the efficiency and speed of operations that are computationally intensive or highly parallelizable. Coprocessors are fundamental to the concept of heterogeneous computing, where multiple types of processors work in concert, each optimized for different kinds of workloads.

### Classification and Types
Coprocessors are classified as a type of processor and are a subclass of the broader category of processors. They can often be found as part of an expansion card within a computer system. Various specialized coprocessors exist, each designed for a particular function:
*   **Floating-Point Unit (FPU)**: A coprocessor specifically for floating-point arithmetic.
*   **AI Accelerator**: Devices that provide hardware acceleration for artificial intelligence applications. Examples include the Tensor Processing Unit (TPU) developed by Google for accelerating neural networks, and vision processing units (VPUs) for machine vision.
*   **Graphics Processing Unit (GPU)**: A specialized electronic circuit and graphics accelerator. The RCP (Reality Co-Processor) used in the Nintendo 64 game console is an example of a graphics coprocessor.
*   **Cryptographic Accelerator**: Co-processors optimized for cryptographic operations, including secure cryptoprocessors and secure elements.
*   **Input/Output (I/O) Coprocessors**: Such as the Intel 8089, designed to manage I/O operations for main CPUs like the Intel 8086 and 8088.
*   **Motion Coprocessors**: Used in mobile devices, like the Apple Motion Coprocessor, Apple M8, and Apple M9, to process sensor data.
*   **Sound Chips**: The SPC700, a sound chip for the SNES, functions as a specialized coprocessor for audio.
*   **Other Specialized Coprocessors**: Include data processing units (DPUs), stream processors, and high-definition video processors. Specific examples like the TF-16 are coprocessors for the Forth language (inception: 2004), and Blockscale is a crypto-mining accelerator ASIC (inception: June 2022).

### Examples of Coprocessors
Many specific hardware components and systems incorporate coprocessor technology:
*   **Intel 8089**: An input/output coprocessor available for use with the Intel 8086 and Intel 8088 CPUs.
*   **Super FX**: A 3D graphics chip introduced in 1992, used in Super Nintendo games to enhance graphical capabilities.
*   **Tensor Processing Unit (TPU)**: A Google-developed coprocessor specifically designed for accelerating neural networks.
*   **Secure Enclave**: An Apple security coprocessor that provides cryptographic services and data protection.
*   **Apple Motion Coprocessor (M8, M9)**: Integrated into Apple devices to efficiently process data from motion sensors.
*   **Cx4**: A math coprocessor.
*   **Xeon Phi**: A series of x86 manycore processors from Intel, often used as accelerators.
*   **Google Coral USB accelerator**: An AI inferencing accelerator that utilizes the Edge TPU coprocessor.

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## References

1. Freebase Data Dumps. 2013
2. National Library of Israel Names and Subjects Authority File
3. KBpedia
4. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)