Mitsubishi Denki Kabushiki Kaisha

Fumiyasu Asai

Shinji Komori

Toshiyuki Tamura

Hidehiro Takata

Hirono Tsubota

Takeshi Fukuhara

Kenji Shima

Tetsuo Yamasaki

A microprocessor which can execute a test and set instruction for an exclusive control by combination of a few simple instructions, and data flow microprocessor which realizes high operation performance mainly in vector operation by reading out of data to be operated, writing in operation result and executing memory access in short time period and in parallel, and whose running efficiency of program is high in multi-processor construction.

Microprocessor and data flow microprocessor having vector operation

A data-driven processor which has a packet assembling unit to add a tag information to the sequentially inputted data when the input data has no tag information, such as destination address or the like, thereby enabling the data to be inputted without using an external circuit, such as a host processor, and improving the data input rate and which also has a packet outputting and rearranging unit for rearranging an output packet stream in a predetermined order to thereby output the data information only, so that it is possible that the data is outputted without any external circuit, such as a host processor, the output rate is improved, and the data output is executed in a predetermined order.

Data-driven processor having an output unit for providing only operand

A data-driven processor which has a packet assembling unit to add a tag information to the sequentially inputted data when the input data has no tag information, such as destination address or the like, thereby enabling the data to be inputted without using an external circuit, such as a host processor, and improving the data input rate and which also has a packet outputting and rearranging unit for rearranging an output packet stream in a predetermined order to thereby output the data information only, so that it is possible that the data is outputted without any external circuit, such as a host processor, the output rate is improved and the data output is executed in a predetermined order.

Data-driven processor having an internal tag-generating system for

A data driven processing system includes a mechanism for generating a data pair from a sequential input data stream by matching identifier fields. The pairing mechanism comprises a hash memory in which input data words to be paired are stored by using hashed addresses. If a hash collision occurs, the data word which caused the hash collision is transmitted to a counter-directional data loop which is used to generate a data pair. If an input data word is not paired after one pass through the data loop it is returned to the hash memory for another pairing operation. Use of both the hash memory and the counter-directional data loop reduces the required hash memory size and increases processing efficiency.

Data driven processor with data pairing apparatus combining a hash

A pipelined processor is provided with a plurality of control stages controlling a datapath made up of a plurality of parallel static-type data latches. The latches each include a feedback circuit, typically a field-effect transistor, which is enabled by a data latch control signal from a particular control stage. Enabling the feedback stage consumes power. A data stagnation detection circuit detects a data stagnation in the datapath, by use of handshake control signals exchanged between the control stages. The data stagnation detection circuit inhibits enablement of the feedback circuit when no data stagnation is detected, reducing power used in the latch.

Reduced power pipelined static data transfer apparatus

A hand-shake type control circuit for controlling a data transfer circuit according to the status of a data transfer request signal. The data transfer request signal is initially received at a NAND gate and is also directly coupled to the reset input of are set flip-flop. The output of the NAND gate is used as a first control signal to set the flip-flop and to cause another circuit to activate data transfer. The flip-flop output is a second control signal which is reset only when the transfer request signal changes from an active to an inactive status. The second control signal is coupled to an input of the NAND gate and inactivates the first control signal. Thus, data transfer cannot recur until after the data transfer request signal changes to an inactive status so that parasitic oscillations are eliminated. The flip-flop consists of two, two input NAND gates that are located out of the path of data transfer and that are easier to fabricate than the prior art D flip-flop.

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Itami, Japan

Fumiyasu Asai