摘要:
A computer implemented method of processing instructions of a computer program. The method comprises providing at least two copies of program status data; identifying a first update instruction of the instructions that writes to at least one field of the program status data; and associating the first update instruction with a first copy of the at least two copies of program status data.
摘要:
A computer implemented method of processing instructions of a computer program. The method comprises providing at least two copies of program status data; identifying a first update instruction of the instructions that writes to at least one field of the program status data; and associating the first update instruction with a first copy of the at least two copies of program status data.
摘要:
A computer processing system is provided. The computer processing system includes a first datastore that stores a subset of information associated with an instruction. A first stage of a processor pipeline writes the subset of information to the first datastore based on an execution of an operation associated with the instruction. A second stage of the pipeline initiates reprocessing of the operation associated with the instruction based on the subset of information stored in the first datastore.
摘要:
A computer processing system is provided. The computer processing system includes a first datastore that stores a subset of information associated with an instruction. A first stage of a processor pipeline writes the subset of information to the first datastore based on an execution of an operation associated with the instruction. A second stage of the pipeline initiates reprocessing of the operation associated with the instruction based on the subset of information stored in the first datastore.
摘要:
A method for processor error checking including receiving an instruction data, generating a pre-processing parity data based on the instruction data, maintaining the pre-processing parity data, processing the instruction data, generating a post-processing parity data based on the processed instruction data, checking for an error related to processing the instruction data by comparing the post-processing parity data to the pre-processing parity data, and transmitting an error signal that indicates the error related to processing the instruction data occurred if the post-processing parity data does not match the pre-processing parity data, wherein checking for the error related to processing the instruction data is performed without using a duplicate processing circuitry.
摘要:
A method for processor error checking including receiving an instruction data, generating a pre-processing parity data based on the instruction data, maintaining the pre-processing parity data, processing the instruction data, generating a post-processing parity data based on the processed instruction data, checking for an error related to processing the instruction data by comparing the post-processing parity data to the pre-processing parity data, and transmitting an error signal that indicates the error related to processing the instruction data occurred if the post-processing parity data does not match the pre-processing parity data, wherein checking for the error related to processing the instruction data is performed without using a duplicate processing circuitry.
摘要:
A method, system, and computer program product for reduced overhead address mode change management in a pipelined, recycling microprocessor are provided. The recycling microprocessor includes logic executing thereon. The microprocessor also includes an instruction fetch unit (IFU) supporting computation of address adds in selected address modes and reporting non-equal comparison of the computation to the logic. The microprocessor further includes a fixed point unit determining whether the mode has changed and reporting changes to the logic. Upon determining the comparison yields an equal result but the mode has changed, a recycle event is triggered to ensure subsequent ofetches are relaunched in the correct mode and that no execution writebacks occur from work performed in an incorrect mode. For comparisons yielding a non-equal result and a changed mode, the logic clears bits set in response to the determinations, and a serialization event is taken to reset a corresponding pipeline for operation in the correct mode.
摘要:
A method, system, and computer program product for reduced overhead address mode change management in a pipelined, recycling microprocessor are provided. The recycling microprocessor includes logic executing thereon. The microprocessor also includes an instruction fetch unit (IFU) supporting computation of address adds in selected address modes and reporting non-equal comparison of the computation to the logic. The microprocessor further includes a fixed point unit determining whether the mode has changed and reporting changes to the logic. Upon determining the comparison yields an equal result but the mode has changed, a recycle event is triggered to ensure subsequent ofetches are relaunched in the correct mode and that no execution writebacks occur from work performed in an incorrect mode. For comparisons yielding a non-equal result and a changed mode, the logic clears bits set in response to the determinations, and a serialization event is taken to reset a corresponding pipeline for operation in the correct mode.
摘要:
A method, processor, and computer program product employing an intermediate register mapper within a register renaming mechanism. A logical register lookup determines whether a hit to a logical register associated with the dispatched instruction has occurred. In this regard, the logical register lookup searches within at least one register mapper from a group of register mappers, including an architected register mapper, a unified main mapper, and an intermediate register mapper. A single hit to the logical register is selected among the group of register mappers. If an instruction having a mapper entry in the unified main mapper has finished but has not completed, the mapping contents of the register mapper entry in the unified main mapper are moved to the intermediate register mapper, and the unified register mapper entry is released, thus increasing a number of unified main mapper entries available for reuse.
摘要:
A method, processor, and computer program product employing an intermediate register mapper within a register renaming mechanism. A logical register lookup determines whether a hit to a logical register associated with the dispatched instruction has occurred. In this regard, the logical register lookup searches within at least one register mapper from a group of register mappers, including an architected register mapper, a unified main mapper, and an intermediate register mapper. A single hit to the logical register is selected among the group of register mappers. If an instruction having a mapper entry in the unified main mapper has finished but has not completed, the mapping contents of the register mapper entry in the unified main mapper are moved to the intermediate register mapper, and the unified register mapper entry is released, thus increasing a number of unified main mapper entries available for reuse.