摘要:
A prefetch request circuit is provided in a processor device. The processor device has hierarchized storage areas and can prefetch data of address to be used between appropriate storage areas among the storage areas, when executing respective instruction flows obtained by multi-flow expansion for one instruction at a time of decoding of the instruction. The prefetch request circuit includes a latch unit to hold, when a state in which the respective instruction flows to access the storage area are executed with a maximum specifiable data transfer volume is specified, the state during a time period of the multi-flow expansion; and a prefetch request signal output unit to output a prefetch request signal to request the prefetch every time when the instruction flow is executed, based on an output signal of the latch unit and a signal indicating an execution timing of the respective instruction flows.
摘要:
In the instruction control apparatus having an instruction processing suspension unit and an error detection unit, in order to improve the reliability of the apparatus, the apparatus is configured in such a way that when an error occurs to certain hardware resources in the instruction processing apparatus, error detection is conducted if instruction processing is under way, but error detection is deterred if instruction processing is in suspension, and the scope of the error which cannot be deterred during the suspension of instruction processing is made narrower than the scope of the error which cannot be deterred during instruction processing.
摘要:
A control reservation station stores the control information of a micro program to control one or more flows of an instruction process and controls each flow using the control information. A data buffer stores data to be used to control each flow and outputs the data at an appropriate timing.