WO2024067772A1 - Photonic processor chip for photonic computing acceleration and signal processing acceleration - Google Patents

Photonic processor chip for photonic computing acceleration and signal processing acceleration Download PDF

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WO2024067772A1
WO2024067772A1 PCT/CN2023/122441 CN2023122441W WO2024067772A1 WO 2024067772 A1 WO2024067772 A1 WO 2024067772A1 CN 2023122441 W CN2023122441 W CN 2023122441W WO 2024067772 A1 WO2024067772 A1 WO 2024067772A1
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processor chip
photon
photonic
unit
electromagnetic wave
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刘国栋
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刘国栋
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06E—OPTICAL COMPUTING DEVICES; COMPUTING DEVICES USING OTHER RADIATIONS WITH SIMILAR PROPERTIES
    • G06E1/00—Devices for processing exclusively digital data
    • G06E1/02—Devices for processing exclusively digital data operating upon the order or content of the data handled
    • G06E1/04—Devices for processing exclusively digital data operating upon the order or content of the data handled for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/76—Architectures of general purpose stored program computers
    • G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
    • G06F15/7807—System on chip, i.e. computer system on a single chip; System in package, i.e. computer system on one or more chips in a single package
    • G06F15/7817—Specially adapted for signal processing, e.g. Harvard architectures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/76—Architectures of general purpose stored program computers
    • G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
    • G06F15/7839—Architectures of general purpose stored program computers comprising a single central processing unit with memory
    • G06F15/7842—Architectures of general purpose stored program computers comprising a single central processing unit with memory on one IC chip (single chip microcontrollers)
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Definitions

  • the present application relates to the technical field of photonic chips for accelerating photonic computing and signal processing.
  • processor performance has increased at a rate of about 55% per year, while memory performance has increased at a rate of about 10% per year.
  • memory performance has increased at a rate of about 10% per year.
  • the unbalanced development speed has caused the current memory access speed to lag seriously behind the processor's computing speed.
  • the memory access bottleneck makes it difficult for high-performance processors to perform as expected.
  • a photonic processor chip for photonic computing acceleration and signal processing acceleration including: a processor and a memory unit; the photonic processor chip uses electromagnetic waves as a carrier for transmitting data; the carrier signal of the electromagnetic wave includes at least one of millimeter waves, centimeter waves and Sub-6GHz; the processor includes an arithmetic logic unit; the arithmetic logic unit is an execution unit of the photonic processor chip, which performs arithmetic and logic operations based on computer instructions and is used to perform two-bit arithmetic operations; the memory unit is a memory component for storing programs and various data information.
  • electromagnetic waves have inherent advantages as information carriers, including ultra-high speed, ultra-high bandwidth and ultra-low loss.
  • optical fiber, millimeter wave, centimeter wave, and Sub-6GHz are used as information and data carriers.
  • the carriers of data transmission are particularly outstanding.
  • the millimeter and centimeter waves in electromagnetic waves have extremely fast response times.
  • the information rate can reach dozens of Tb/s, and the performance can be improved by hundreds of times.
  • electromagnetic waves have extremely high information capacity, which is 3 to 4 orders of magnitude higher than electrons.
  • the use of electromagnetic wave technology can achieve low exchange delay and high transmission bandwidth.
  • the present application proposes a photonic processor chip for photonic computing acceleration and signal processing acceleration, including: a processor and a memory unit; the photonic processor chip uses electromagnetic waves as a carrier for transmitting data, and electromagnetic waves are used to transmit data; the carrier signal of the electromagnetic wave includes at least one of millimeter waves, centimeter waves and Sub-6GHz; the carrier signal of the electromagnetic wave can be determined based on the application scenario of the photonic processor chip; the processor includes an arithmetic logic unit (Arithmetic Logic Unit, ALU), the arithmetic logic unit is the execution unit of the photonic processor chip, which executes arithmetic and logical operations with computer instructions, is a core component, and its main function is to perform two-bit arithmetic operations, and the memory unit is a memory component for storing programs and various data information.
  • ALU arithmetic logic unit
  • millimeter waves, centimeter waves, or Sub-6GHz can be used as carrier signals due to different usage scenarios.
  • the above carrier signals are all electromagnetic waves and can be used as carriers to transmit data.
  • the carrier signal can be determined based on the application scenario of the electromagnetic wave bus.
  • the processor can include a central processing unit (CPU) or a graphics processing unit (GPU). The specific type of processor can be determined based on the application scenario of the photonic processor chip.
  • the photon processor chip is divided into multiple modules according to the chip principle and function.
  • the photon processor chip may include a processor and a memory unit, etc., wherein the processor may include an arithmetic logic unit.
  • the processor outputs a control signal, and the processor may be a central processing unit.
  • the input and output ends of each module are respectively connected to the transmitting end and the receiving end of the bus transmitting millimeter waves.
  • the arithmetic logic unit and the memory unit are connected by the bus transmitting millimeter waves to form a processing terminal.
  • the bus for transmitting millimeter waves can connect the memory unit and the central processing unit to realize communication between the memory unit and the central processing unit;
  • the photon processor chip can also include a floating-point operator, and the bus for transmitting millimeter waves can also connect the floating-point operator and the central processing unit to realize communication between the floating-point operator and the central processing unit;
  • the bus for transmitting millimeter waves can also connect the floating-point operator and the memory unit to realize communication between the floating-point operator and the memory unit, and transmit the data to be transmitted through millimeter waves.
  • the bus for transmitting millimeter waves can replace the role of the data bus in the traditional CPU, and the bus for transmitting millimeter waves replaces the data bus in the traditional CPU, wherein the central processing unit includes a microprocessor, and the microprocessor and the memory unit are respectively connected through the transmitting end and the receiving end of the bus for transmitting millimeter waves to realize communication between the microprocessor and the memory unit.
  • the bus for transmitting millimeter waves can also replace some of the replaceable connection lines in the traditional CPU, and use millimeter waves as a carrier for data or signal transmission to transmit and receive the data or signals to be transmitted.
  • the photon processor chip connects the arithmetic logic unit and the memory unit in the processor through the electromagnetic wave bus to form a processing terminal, and the transmitted data is processed by the processor to complete the calculation and processing, which can effectively Solve the transmission and processing of massive data, improve the stability of data transmission and the efficiency of data processing.
  • This application uses millimeter waves as the carrier for transmitting data on the photonic processor chip, which can achieve low exchange delay and high transmission bandwidth.

Abstract

A photonic processor chip for photonic computing acceleration and signal processing acceleration, comprising: an arithmetic logic unit and a memory unit. The photonic processor chip uses an electromagnetic wave as a carrier for information transmission; the arithmetic logic unit is an execution unit of the photonic processor chip, executes arithmetic and logic operations on the basis of computer instructions, and is used for performing binary arithmetic operations; and the memory unit is a memory component for storing programs and various data information.

Description

光子计算加速及信号处理加速的光子处理器芯片Photonic processor chips for photonic computing acceleration and signal processing acceleration
相关申请Related Applications
本申请要求2022年9月29日申请的，申请号为202211198078.X，名称为“光子计算加速及信号处理加速的光子芯片”的中国专利申请的优先权，在此将其全文引入作为参考。This application claims priority to the Chinese patent application filed on September 29, 2022, with application number 202211198078.X and title “Photonic chip for photonic computing acceleration and signal processing acceleration”, the entire text of which is hereby incorporated by reference.
技术领域Technical Field
本申请涉及光子计算加速及信号处理加速的光子芯片技术领域。The present application relates to the technical field of photonic chips for accelerating photonic computing and signal processing.
背景技术Background technique
过去几十年中处理器的性能以每年约55％的速度提升，而内存性能的提升速度约为每年10％，长期累积下来，不平衡的发展速度造成了当前内存的存取速度严重滞后于处理器的计算速度，访存瓶颈导致高性能处理器难以发挥出应有的功效。In the past few decades, processor performance has increased at a rate of about 55% per year, while memory performance has increased at a rate of about 10% per year. Over a long period of time, the unbalanced development speed has caused the current memory access speed to lag seriously behind the processor's computing speed. The memory access bottleneck makes it difficult for high-performance processors to perform as expected.
发明内容Summary of the invention
根据本申请的各种实施例，提供了一种光子计算加速及信号处理加速的光子处理器芯片，包括：处理器和存储器单元；光子处理器芯片以电磁波作为传输数据的载体；电磁波的载波信号包括毫米波、厘米波以及Sub-6GHz中的至少一种；处理器包括算术逻辑单元；算术逻辑单元是光子处理器芯片的执行单元，基于计算机指令执行算术与逻辑操作，用于进行二位元的算术运算；存储器单元是存储程序和各种数据信息的记忆部件。According to various embodiments of the present application, a photonic processor chip for photonic computing acceleration and signal processing acceleration is provided, including: a processor and a memory unit; the photonic processor chip uses electromagnetic waves as a carrier for transmitting data; the carrier signal of the electromagnetic wave includes at least one of millimeter waves, centimeter waves and Sub-6GHz; the processor includes an arithmetic logic unit; the arithmetic logic unit is an execution unit of the photonic processor chip, which performs arithmetic and logic operations based on computer instructions and is used to perform two-bit arithmetic operations; the memory unit is a memory component for storing programs and various data information.
本申请的一个或多个实施例的细节在下面的描述中提出。本申请的其它特征、目的和优点将从说明书以及权利要求书变得明显。The details of one or more embodiments of the present application are set forth in the description below. Other features, objects, and advantages of the present application will become apparent from the description and claims.
具体实施方式Detailed ways
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
需要说明的是，与电子相比，电磁波作为信息载体具有先天的优势，包括超高速度、超高带宽以及超低损耗。特别是光纤、毫米波、厘米波、以及Sub-6GHz等作为信息和数 据传输的载体都特别突出。在传输信息时电磁波中的毫米波及厘米波具有极快的响应时间。信息速率可以达到几十个Tb/s，性能能够提升数百倍。其次电磁波具有极高的信息容量，比电子高3～4个量级。采用电磁波技术可以实现低交换延迟和高传输带宽。It should be noted that compared with electrons, electromagnetic waves have inherent advantages as information carriers, including ultra-high speed, ultra-high bandwidth and ultra-low loss. In particular, optical fiber, millimeter wave, centimeter wave, and Sub-6GHz are used as information and data carriers. The carriers of data transmission are particularly outstanding. When transmitting information, the millimeter and centimeter waves in electromagnetic waves have extremely fast response times. The information rate can reach dozens of Tb/s, and the performance can be improved by hundreds of times. Secondly, electromagnetic waves have extremely high information capacity, which is 3 to 4 orders of magnitude higher than electrons. The use of electromagnetic wave technology can achieve low exchange delay and high transmission bandwidth.
具体而言，本申请提出一种光子计算加速及信号处理加速的光子处理器芯片，包括：处理器和存储器单元；光子处理器芯片以电磁波作为传输数据的载体，电磁波用于传输数据；电磁波的载波信号包括毫米波、厘米波以及Sub-6GHz中的至少一种；电磁波的载波信号可以基于光子处理器芯片的应用场景确定；处理器包括算术逻辑单元(Arithmetic Logic Unit，ALU)，算术逻辑单元是光子处理器芯片的执行单元，以计算机指令执行算术与逻辑操作，是核心的组成部分，主要功能是进行二位元的算术运算，存储器单元是存储程序和各种数据信息的记忆部件。Specifically, the present application proposes a photonic processor chip for photonic computing acceleration and signal processing acceleration, including: a processor and a memory unit; the photonic processor chip uses electromagnetic waves as a carrier for transmitting data, and electromagnetic waves are used to transmit data; the carrier signal of the electromagnetic wave includes at least one of millimeter waves, centimeter waves and Sub-6GHz; the carrier signal of the electromagnetic wave can be determined based on the application scenario of the photonic processor chip; the processor includes an arithmetic logic unit (Arithmetic Logic Unit, ALU), the arithmetic logic unit is the execution unit of the photonic processor chip, which executes arithmetic and logical operations with computer instructions, is a core component, and its main function is to perform two-bit arithmetic operations, and the memory unit is a memory component for storing programs and various data information.
对于光子处理器芯片作为传输数据的载体的电磁波，因使用场景不同，可以采用毫米波作为载波信号，也可以采用厘米波作为载波信号，还可以采用Sub-6GHz作为载波信号，上述载波信号均为电磁波，可以作为载体传输数据，载波信号可以基于电磁波总线的应用场景确定；处理器可以包括中央处理器(Central Processing Unit，CPU)或图形处理器(Graphics Processing Unit，GPU)，具体的处理器的类型可以根据光子处理器芯片的应用场景确定。For the electromagnetic waves used as carriers for transmitting data by the photonic processor chip, millimeter waves, centimeter waves, or Sub-6GHz can be used as carrier signals due to different usage scenarios. The above carrier signals are all electromagnetic waves and can be used as carriers to transmit data. The carrier signal can be determined based on the application scenario of the electromagnetic wave bus. The processor can include a central processing unit (CPU) or a graphics processing unit (GPU). The specific type of processor can be determined based on the application scenario of the photonic processor chip.
在处理器芯片原理的基础上，按芯片原理和功能将光子处理器芯片划分成多个模块，光子处理器芯片可以包括处理器和存储器单元等，其中，处理器可以包括算术逻辑单元。由处理器输出控制信号，处理器可以为中央处理器。将各模块的输入端和输出端分别与传输毫米波的总线的发送端和接收端相连。算术逻辑单元和存储器单元之间由传输毫米波的总线连接，形成处理终端。传输毫米波的总线可以连接存储器单元和中央处理器，实现存储器单元与中央处理器之间的通信；光子处理器芯片还可以包括浮点运算器，传输毫米波的总线还可以连接浮点运算器和中央处理器，实现浮点运算器与中央处理器之间的通信；传输毫米波的总线还可以连接浮点运算器和存储器单元，实现浮点运算器与存储器单元之间的通信，通过毫米波传输需要传输的数据，传输毫米波的总线可以替代传统CPU中的数据总线的作用，传输毫米波的总线替代传统CPU中的数据总线，其中，中央处理器包括微处理器，通过传输毫米波的总线的发射端和接收端分别连接微处理器与存储器单元，实现微处理器与存储器单元之间的通信，同时传输毫米波的总线还可以替代传统CPU中的部分能替代的连接线路，利用毫米波作为数据或信号传输的载体，把需要传输的数据或信号，传输出去，接收进来，进一步光子处理器芯片通过电磁波总线连接处理器中的算术逻辑单元和存储器单元形成处理终端，通过处理器处理传输的数据，完成计算和处理，能够有效 解决海量数据的传输与处理，提高了数据传输的稳定性和数据处理的效率。本申请通过毫米波作为光子处理器芯片传输数据的载体，可以实现低交换延迟和高传输带宽。Based on the principle of the processor chip, the photon processor chip is divided into multiple modules according to the chip principle and function. The photon processor chip may include a processor and a memory unit, etc., wherein the processor may include an arithmetic logic unit. The processor outputs a control signal, and the processor may be a central processing unit. The input and output ends of each module are respectively connected to the transmitting end and the receiving end of the bus transmitting millimeter waves. The arithmetic logic unit and the memory unit are connected by the bus transmitting millimeter waves to form a processing terminal. The bus for transmitting millimeter waves can connect the memory unit and the central processing unit to realize communication between the memory unit and the central processing unit; the photon processor chip can also include a floating-point operator, and the bus for transmitting millimeter waves can also connect the floating-point operator and the central processing unit to realize communication between the floating-point operator and the central processing unit; the bus for transmitting millimeter waves can also connect the floating-point operator and the memory unit to realize communication between the floating-point operator and the memory unit, and transmit the data to be transmitted through millimeter waves. The bus for transmitting millimeter waves can replace the role of the data bus in the traditional CPU, and the bus for transmitting millimeter waves replaces the data bus in the traditional CPU, wherein the central processing unit includes a microprocessor, and the microprocessor and the memory unit are respectively connected through the transmitting end and the receiving end of the bus for transmitting millimeter waves to realize communication between the microprocessor and the memory unit. At the same time, the bus for transmitting millimeter waves can also replace some of the replaceable connection lines in the traditional CPU, and use millimeter waves as a carrier for data or signal transmission to transmit and receive the data or signals to be transmitted. Further, the photon processor chip connects the arithmetic logic unit and the memory unit in the processor through the electromagnetic wave bus to form a processing terminal, and the transmitted data is processed by the processor to complete the calculation and processing, which can effectively Solve the transmission and processing of massive data, improve the stability of data transmission and the efficiency of data processing. This application uses millimeter waves as the carrier for transmitting data on the photonic processor chip, which can achieve low exchange delay and high transmission bandwidth.
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。 The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims (10)

  1. 一种光子计算加速及信号处理加速的光子处理器芯片，包括：处理器和存储器单元；所述光子处理器芯片以电磁波作为传输数据的载体；所述电磁波的载波信号包括毫米波、厘米波以及Sub-6GHz中的至少一种；所述处理器包括算术逻辑单元；所述算术逻辑单元是所述光子处理器芯片的执行单元，基于计算机指令执行算术与逻辑操作，用于进行二位元的算术运算；所述存储器单元是存储程序和各种数据信息的记忆部件。A photon processor chip for accelerating photon computing and signal processing, comprising: a processor and a memory unit; the photon processor chip uses electromagnetic waves as a carrier for transmitting data; the carrier signal of the electromagnetic wave comprises at least one of millimeter waves, centimeter waves and Sub-6GHz; the processor comprises an arithmetic logic unit; the arithmetic logic unit is an execution unit of the photon processor chip, performs arithmetic and logic operations based on computer instructions, and is used for performing two-bit arithmetic operations; the memory unit is a memory component for storing programs and various data information.
  2. 根据权利要求1所述的光子处理器芯片，其特征在于，所述处理器包括中央处理器和图形处理器中的至少一种；所述处理器为根据所述光子处理器芯片的应用场景确定。The photon processor chip according to claim 1 is characterized in that the processor includes at least one of a central processing unit and a graphics processing unit; and the processor is determined according to an application scenario of the photon processor chip.
  3. 根据权利要求1所述的光子处理器芯片，其特征在于，所述光子处理器芯片以毫米波、厘米波以及Sub-6GHz中的至少一种作为载波信号；所述载波信号为基于电磁波的应用场景确定。The photon processor chip according to claim 1 is characterized in that the photon processor chip uses at least one of millimeter wave, centimeter wave and Sub-6 GHz as a carrier signal; and the carrier signal is determined based on the application scenario of the electromagnetic wave.
  4. 根据权利要求1所述的光子处理器芯片，其特征在于，包括发射端和接收端；所述发射端和所述接收端用于与相应的外部设备的接口电路连接，以形成所述电磁波在存储器设备和所述外部设备之间传递信息的通道。The photonic processor chip according to claim 1 is characterized in that it includes a transmitting end and a receiving end; the transmitting end and the receiving end are used to connect to the interface circuit of the corresponding external device to form a channel for the electromagnetic wave to transmit information between the memory device and the external device.
  5. 根据权利要求1所述的光子处理器芯片，其特征在于，包括电磁波总线；所述处理器包括微处理器；所述电磁波总线分别连接所述微处理器与所述存储器单元，用于所述微处理器与所述存储器单元之间的通信，进行数据传输。The photonic processor chip according to claim 1 is characterized in that it includes an electromagnetic wave bus; the processor includes a microprocessor; the electromagnetic wave bus connects the microprocessor and the memory unit respectively, and is used for communication between the microprocessor and the memory unit for data transmission.
  6. 根据权利要求5所述的光子处理器芯片，其特征在于，所述电磁波总线分别连接所述算术逻辑单元和所述存储器单元。The photonic processor chip according to claim 5 is characterized in that the electromagnetic wave bus connects the arithmetic logic unit and the memory unit respectively.
  7. 根据权利要求5所述的光子处理器芯片，其特征在于，还包括：浮点运算器；所述处理器包括中央处理器；所述电磁波总线分别连接所述存储器单元和所述中央处理器，用于所述存储器单元与所述中央处理器之间的通信，所述电磁波总线分别连接所述浮点运算器和所述中央处理器，用于所述浮点运算器与所述中央处理器之间的通信；所述电磁波总线分别连接所述浮点运算器和所述存储器单元，用于所述浮点运算器与所述存储器单元之间的通信。The photon processor chip according to claim 5 is characterized in that it also includes: a floating-point operator; the processor includes a central processing unit; the electromagnetic wave bus is respectively connected to the memory unit and the central processing unit, and is used for communication between the memory unit and the central processing unit, and the electromagnetic wave bus is respectively connected to the floating-point operator and the central processing unit, and is used for communication between the floating-point operator and the central processing unit; the electromagnetic wave bus is respectively connected to the floating-point operator and the memory unit, and is used for communication between the floating-point operator and the memory unit.
  8. 根据权利要求7所述的光子处理器芯片，其特征在于，所述中央处理器用于对芯片的数据输入输出和计算存储过程进行控制。The photonic processor chip according to claim 7 is characterized in that the central processing unit is used to control the data input and output and calculation and storage processes of the chip.
  9. 根据权利要求1所述的光子处理器芯片，其特征在于，所述光子处理器芯片为光子中央处理器芯片。The photon processor chip according to claim 1 is characterized in that the photon processor chip is a photon central processing unit chip.
  10. 根据权利要求1所述的光子处理器芯片，其特征在于，所述光子处理器芯片为光 子图形处理器芯片。 The photon processor chip according to claim 1 is characterized in that the photon processor chip is a photon processor chip. Sub-graphics processor chip.
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