摘要:
An apparatus for efficient parallel executing instruction avoiding the usage of cross bypasses, the apparatus including an instruction buffer for storing instructions, of decoders for decoding, in parallel, the instructions which simultaneously issue from the instruction buffer, executing units for executing the instructions decoded in the decoders, and an instruction-issuing controlling means for controlling the issuing of the instructions in such a way that, when the instructions are executed, one of the plural executing units executes instructions more frequently than the rest of the plural executing units. The apparatus is preferably incorporated in an information processor to superscalar or out-of-order instruction execution.
摘要:
The present invention relates to a multithread processor. In the multithread processor, when a cache miss occurs on a request related to an instruction in, of a plurality of caches arranged hierarchically, a cache at the lowest place in the hierarchy, with respect to the request suffering the cache miss, a cache control unit notifies an instruction identifier and a thread identifier, which are related to the instruction, to a multithread control unit. When a cache miss occurs on an instruction to be next completed, the multithread control unit makes the switching between threads on the basis of the instruction identifier and thread identifier notified from the cache control unit. This enables effective thread switching, thus enhancing the processing speed.
摘要:
The present invention relates to a multithread processor. In the multithread processor, when a cache miss occurs on a request related to an instruction in, of a plurality of caches arranged hierarchically, a cache at the lowest place in the hierarchy, with respect to the request suffering the cache miss, a cache control unit notifies an instruction identifier and a thread identifier, which are related to the instruction, to a multithread control unit. When a cache miss occurs on an instruction to be next completed, the multithread control unit makes the switching between threads on the basis of the instruction identifier and thread identifier notified from the cache control unit. This enables effective thread switching, thus enhancing the processing speed.
摘要:
A processor includes a storage unit storing an instruction, an instruction extension information register that includes a first area and a second area, an instruction decoding unit that decodes a first prefix instruction including first extension information extending an immediately following instruction written to the first area when the first prefix instruction is executed, and that decodes a second prefix instruction including the first extension information and a second extension information extending an instruction immediately following two instructions of the second prefix instruction, an instruction packing unit that generates a packed instruction including at least one of the first prefix instruction or the second prefix instruction, and the instruction immediately following the first prefix instruction or the second prefix instruction when the instruction decoding unit decodes the first prefix instruction or the second prefix instruction, an instruction execution unit that executes the packed instruction generated by the instruction packing unit.
摘要:
A plurality of register windows in a multithread processor are each provided for a corresponding thread and capable of storing data to be used for instruction processing in an arithmetic unit. A work register in the multithread processor is capable of mutually transferring data with respect to the register windows and the arithmetic unit. A multithread control unit in the multithread processor controls data transfer among the register windows, the work register and the arithmetic unit on the basis of an execution thread identifier identifying the thread to be executed in the arithmetic unit. This enables conducting the multithread processing at a high speed.
摘要:
A processing unit has an extended register to which instruction extension information indicating an extension of an instruction can be set. An operation unit that, when instruction extension information is set to the extended register, executes a subsequent instruction following a first instruction for writing the instruction extension information into the extended register, extends the subsequent instruction based on the instruction extension information.
摘要:
The present invention provides a refrigerating machine oil, a compressor oil composition, a hydraulic oil composition, a metalworking oil composition, a heat treating oil composition, a lubricating oil composition for machine tools and a lubricating oil composition which comprise a lubricating oil base oil having % CA of not more than 2, % CP/% CN of not less than 6 and an iodine value of not more than 2.5.
摘要:
A processing unit includes a plurality of thread execution units each provided with a performance analysis circuit for measuring various types of events resulting from execution of instructions and a commit stack entry unit for controlling the completion of executed instructions and each executing a thread having a plurality of instructions, a commit scope register for storing instructions of completion candidates stored in each commit stack entry unit by execution by each thread execution unit and performing processing for completion of instructions included in the thread, and a thread selecting means for sending commit events of the instructions to a performance analysis circuit provided in each thread execution unit corresponding to the instructions when performing commit processing for instructions stored in the commit scope register.
摘要:
The present invention includes a decode section for simultaneously holding a plurality of instructions in one thread at a time and for decoding the held instructions; an execution pipeline capable of simultaneously executing each processing represented by the respective instructions belonging to different threads and decoded by the decode section; a reservation station for receiving the instructions decoded by the decode section and holding the instructions, if the decoded instructions are of sync attribute, until executable conditions are ready and thereafter dispatching the decoded instructions to the execution pipeline; a pre-decode section for confirming by a simple decoding, prior to decoding by the decode section, whether or not the instructions are of sync attribute; and an instruction buffer for suspending issuance to the decode section and holding the instructions subsequent to an instruction of sync attribute.
摘要:
An arithmetic device simultaneously processes a plurality of threads and may continue the process by minimizing the degradation of the entire performance although a hardware error occurs. An arithmetic device 100 includes: an instruction execution circuit 101 capable of selectively executing a mode in which the instruction sequences of a plurality of threads are executed and a mode in which the instruction sequence of a single thread is executed; and a switch indication circuit 102 instructing the instruction execution circuit 101 to switch a thread mode.