169 results about "Very long instruction word" patented technology

A method for efficient and fast implementation of context-based adaptive binary arithmetic encoding in H.264/AVC video encoders is disclosed. The H.264/AVC video standard supports two entropy coding mechanisms. These include Context Adaptive Binary Arithmetic Coding (CABAC) and Context Adaptive Variable Length Coding (CAVLC). The entropy coding efficiency of CABAC exceeds that of CAVLC by a clear margin. The method further provides techniques that make the implementation of CABAC on digital signal processors (DSPs) and other processing devices significantly faster. In one aspect, the method increases decoupling between the binarization process and the arithmetic encoding process from bit level to single or multiple syntax element(s) level. The binarized data is provided to the arithmetic encoding engine in bulk, thereby significantly reducing the overhead due to procedure calls. In another aspect, a CABAC arithmetic encoding engine format is provided which decreases data writing overhead and better exploits parallelism in the encoding process. This aspect is particularly advantageous to, for example, very long instruction word (VLIW) DSPs and media processors. In yet another aspect, the method discloses efficient CABAC binarization schemes for syntax elements.

A processor for use in a router, the processor having a systolic array pipeline for processing data packets to determine to which output port of the router the data packet should be routed. In one embodiment, the systolic array pipeline includes a plurality of programmable functional units and register files arranged sequentially as stages, for processing packet contexts (which contain the packet's destination address) to perform operations, under programmatic control, to determine the destination port of the router for the packet. A single stage of the systolic array may contain a register file and one or more functional units such as adders, shifters, logical units, etc., for performing, in one example, very long instruction word (vliw) operations. The processor may also include a forwarding table memory, on-chip, for storing routing information, and a cross bar selectively connecting the stages of the systolic array with the forwarding table memory.

A processor for use in a router, the processor having a systolic array pipeline for processing data packets to determine to which output port of the router the data packet should be routed. In one embodiment, the systolic array pipeline includes a plurality of programmable functional units and register files arranged sequentially as stages, for processing packet contexts (which contain the packet's destination address) to perform operations, under programmatic control, to determine the destination port of the router for the packet. A single stage of the systolic array may contain a register file and one or more functional units such as adders, shifters, logical units, etc., for performing, in one example, very long instruction word (vliw) operations. The processor may also include a forwarding table memory, on-chip, for storing routing information, and a cross bar selectively connecting the stages of the systolic array with the forwarding table memory.

The invention provides a very long instruction word processor structure supporting simultaneous multithreading, which comprises at least two parallel instruction processing pipeline structures, wherein each instruction processing pipeline structure comprises an instruction obtaining module, an instruction distribution module and an instruction executing module, a general register file, a floating point register file and a control register file, the instruction obtaining module is used for obtaining instruction information, the instruction distribution module is used for receiving and distributing the instruction information obtained by the instruction obtaining module, and the instruction executing module comprises instruction executing units A, D, M and F which are used for executing the instruction information, the general register file is used for storing executing results of the corresponding executing units A, M and D, and the floating point register file is used for storing executing results of the corresponding executing units D and F. Through the structure, the resources of a processor can be more sufficiently utilized, the threading access efficiency is enhanced, and the processing speed of the processor is improved.

A processor device is disclosed and includes a memory and a sequencer that is responsive to the memory. The sequencer can support very long instruction word (VLIW) instructions and superscalar instructions. The processor device further includes a first instruction execution unit responsive to the sequencer, a second instruction execution unit responsive to the sequencer, a third instruction execution unit responsive to the sequencer, and a fourth instruction execution unit responsive to the sequencer. Further, the processor device includes a plurality of register files and each of the plurality of register files includes a plurality of registers. The plurality of register files are coupled to the sequencer and coupled to the first instruction execution unit, the second instruction execution unit, the third instruction execution unit, and the fourth instruction execution unit.

A computer system supplies instructions simultaneously to a plurality of parallel execution pipelines in either superscalar mode or very long instruction word mode with checks for vertical and horizontal dependency between instructions, the horizontal dependency checks between instructions supplied in the same machine cycle being effective in superscalar mode but disabled in very long instruction word mode.

Apparatus and method for dispatching a very long instruction word (VLIW) instruction having a variable length are provided. The apparatus for dispatching a VLIW instruction includes a packet buffer for storing at least one or more VLIW instructions, and a decoding unit configured to constitute a VLIW instruction to be currently executed among the VLIW instructions stored in the packet buffer and decode predetermined bits of each sub-instruction contained in the VLIW instruction. The apparatus dispatches a corresponding sub-instruction to an FU which corresponds to each sub-instruction, based on the results of decoding performed in the decoding unit, position information on the sub-instructions that are placed on the packet buffer, and position information on the sub-instructions that are placed in the current VLIW instruction. Sub-instructions can be effectively dispatched to corresponding FUs using simple decoding logic even in a case where the length of the VLIW instruction is not fixed.

A Very Long Instruction Word (VLIW) processor has a clustered architecture including a plurality of independent functional units and a multi-ported register file that is divided into a plurality of separate register file segments, the register file segments being individually associated with the plurality of independent functional units. The functional units access the respective associated register file segments using read operations that are local to the functional unit/ register file segment pairs. In contrast, the functional units access the register file segments using write operations that are broadcast to a plurality of register file segments. Independence between clusters is attained since the separate clustered functional unit/ register file segment pairs have local (internal) bypassing that allows internal computations to proceed, but have only limited bypassing between different functional unit/ register file segment pair clusters. Thus a particular functional unit/ register segment pair does not bypass to all other functional unit/ register segment pairs.

The invention discloses an artificial intelligent type hydraulic support electric-hydraulic control system which comprises a hardware layer, a system layer, a specialist system and a data base. The system conducts communication through a communication bus and adopts a full duplex signal. The system layer comprises management layer Agents and control layer Agents, and each hydraulic support corresponds to a control layer Agent. The specialist system is connected with a communication bus signal, and the data base stores sensing parameters of three machines and is in signal connection with the communication bus. The artificial intelligent type hydraulic support electric-hydraulic control system has the advantages that the system layer calls the current sensing parameters of the three machines saved by the data base, ultra long instruction words are formed finally by calling the sensing parameters of the three machines through the specialist system, the sensing parameters are transmitted to each hydraulic support controller through the communication bus, the control layer Agents make an automatic movement decision on data information, the management layer Agents coordinate movements of the control layer Agents, and intellectualization of the hydraulic support electric-hydraulic control system of a whole fully mechanized coal mining face is achieved.

A pipelined data processing unit includes an instruction sequencer and n functional units capable of executing n operations in parallel. The instruction sequencer includes a random access memory for storing very-long-instruction-words (VLIWs) used in operations involving the execution of two or more functional units in parallel. Each VLIW comprises a plurality of short-instruction-words (SIWs) where each SIW corresponds to a unique type of instruction associated with a unique functional unit. VLIWs are composed in the VLIW memory by loading and concatenating SIWs in each address, or entry. VLIWs are executed via the execute-VLIW (XV) instruction. The iVLIWs can be compressed at a VLIW memory address by use of a mask field contained within the XV1 instruction which specifies which functional units are enabled, or disabled, during the execution of the VLIW. The mask can be changed each time the XV1 instruction is executed, effectively modifying the VLIW every time it is executed. The VLIW memory (VIM) can be further partitioned into separate memories each associated with a function decode-and-execute unit. With a second execute VLIW instruction XV2, each functional unit's VIM can be independently addressed thereby removing duplicate SIWs within the functional unit's VIM. This provides a further optimization of the VLIW storage thereby allowing the use of smaller VLIW memories in cost sensitive applications.

An instruction processing method for checking an arrangement of basic instructions in a very long instruction word (VLIW) instruction, suitable for language processing systems, an assembler and a compiler, used for processors which execute variable length VLIW instructions designed based on variable length VLIW architecture.

A SIMD machine employing a plurality of parallel processor (PEs) in which communications hazards are eliminated in an efficient manner. An indirect Very Long Instruction Word instruction memory (VIM) is employed along with execute and delimiter instructions. A masking mechanism may be employed to control which PEs have their VIMs loaded. Further, a receive model of operation is preferably employed. In one aspect, each PE operates to control a switch that selects from which PE it receives. The present invention addresses a better machine organization for execution of parallel algorithms that reduces hardware cost and complexity while maintaining the best characteristics of both SIMD and MIMD machines and minimizing communication latency. This invention brings a level of MIMD computational autonomy to SIMD indirect Very Long Instruction Word (iVLIW) processing elements while maintaining the single thread of control used in the SIMD machine organization. Consequently, the term Synchronous-MIMD (SMIMD) is used to describe the present approach.

An apparatus and a method are provided for a parallel processing very long instruction word (VLIW) computer. The apparatus includes: an index code generation unit sequentially generating an index code, which is associated with a number of no operation (NOP) instruction word between effective instruction words, with respect to each of instruction word groups to be executed in a VLIW computer; an instruction compression unit sequentially deleting the NOP instruction word which corresponds to the index code with respect to each of instruction word groups; and an instruction word conversion unit converting the effective instruction words to include the index code, the effective instruction words corresponding to the NOP instruction words.

The invention discloses a VLIW (Very Long Instruction Word) processor device and a loop processing method thereof. The VLIW processor device comprises a loop unit, an address sending unit and an instruction decoding unit, wherein the loop unit comprises a loop volume data calculating module, a loop counting module, a memory module and an instruction fetching address calculating module. The loop processing method comprises the following steps of: obtaining a loop mark instruction; extracting a loop parameter carried in the loop mark (LP) instruction; obtaining and storing loop volume data according to the address of the loop mark instruction and the loop parameter; taking the stored loop volume body data as current loop volume data; obtaining and executing the instruction according to a current instruction fetching address; and obtaining a next instruction fetching address according to the current instruction fetching address, and obtaining the current instruction fetching address by comparing the next instruction fetching address with the loop volume data. The problems that the loop control of a VLIW processor cannot be completely realized by hardware and the loop execution expense is high are solved, therefore, the performance of the VLIW processor is greatly increased.