摘要:
A design is simulated utilizing a hardware description language (HDL) simulation model by stimulating the HDL simulation model with a testcase. The HDL simulation model includes instrumentation not forming a portion of the design that includes a count event counter for a count event in the design, and the simulation includes counting occurrences of the count event in the count event counter to obtain a count event value. A threshold is also established for an aggregate count event value for the count event counter. After completion of the testcase, a determination is made whether addition of the count event value to the aggregate count event value for the count event counter would cause the aggregate count event value to exceed the threshold. If not, the count event value is recorded in a testcase data storage area, and the count event value is accumulated in the aggregate count event value. If so, the count event value is discarded without recording the count event value in the testcase data storage area.
摘要:
A digital system includes one or more design entities containing a functional portion of the digital system. Within a configuration database, one or more configuration entities are instantiated. The configuration entities including an Error checking Dial (EDial) having a plurality of input latches within the digital design and a plurality of output latches within the digital design. The EDial has an associated function defining a relationship between values of the input latches and values of the output latches. An instance of the EDial in the configuration database is accessed to access the values of the output latches in the digital design.
摘要:
In a method of data processing, a database defines a Dial entity and at least one instance of the Dial entity. Each instance of the Dial entity has an input having a plurality of different possible input values and one or more outputs, and each of the plurality of different possible input values has a different associated output value set for the one or more outputs. Each instance of the Dial entity determines a value of at least one of a plurality of configuration latches in a digital system separate from the database. The database also associates with the Dial entity at least one set of biasing weights that, when applied, determines a probability of each instance of the Dial entity having particular ones of the plurality of different possible input values. In response to a call to set the plurality of configuration latches, the database is accessed to apply the at least one set of biasing weights to select one of the plurality of different possible input values for the at least one instance of the Dial entity. The plurality of configuration latches in the digital system are set based upon the output value set for the one or more outputs of the at least one instance of the Dial entity.
摘要:
According to a method of data processing, a data set including at least one entry specifying a signal group by a predetermined signal group name is received by a data processing system. In response to receipt of the data set, the entry in the data set is processed to identify the signal group name. Signal group information associated with an event trace file containing simulation results is accessed to determine signal names of multiple signals that are members of the signal group. Simulation results from the event trace file that are associated with instances of said multiple signals are then included within a presentation of simulation results.
摘要:
According to a method of simulation processing, one or more HDL source files describing a digital design including a plurality of hierarchically arranged design entities are received. The one or more HDL source files include one or more statements instantiating a plurality of print events within the plurality of hierarchically arranged design entities, where each print event has an associated message and at least one associated signal in the digital design. The one or more HDL source files are processed to obtain a simulation executable model including a data structure describing the plurality of print events defined for the simulation executable model and associating each of the plurality of print events with its respective associated signal.
摘要:
A processing unit includes a store-in lower level cache having reservation logic that determines presence or absence of a reservation and a processor core including a store-through upper level cache, an instruction execution unit, a load unit that, responsive to a hit in the upper level cache on a load-reserve operation generated through execution of a load-reserve instruction by the instruction execution unit, temporarily buffers a load target address of the load-reserve operation, and a flag indicating that the load-reserve operation bound to a value in the upper level cache. If a storage-modifying operation is received that conflicts with the load target address of the load-reserve operation, the processor core sets the flag to a particular state, and, responsive to execution of a store-conditional instruction, transmits an associated store-conditional operation to the lower level cache with a fail indication if the flag is set to the particular state.
摘要:
A processing unit includes a store-in lower level cache having reservation logic that determines presence or absence of a reservation and a processor core including a store-through upper level cache, an instruction execution unit, a load unit that, responsive to a hit in the upper level cache on a load-reserve operation generated through execution of a load-reserve instruction by the instruction execution unit, temporarily buffers a load target address of the load-reserve operation, and a flag indicating that the load-reserve operation bound to a value in the upper level cache. If a storage-modifying operation is received that conflicts with the load target address of the load-reserve operation, the processor core sets the flag to a particular state, and, responsive to execution of a store-conditional instruction, transmits an associated store-conditional operation to the lower level cache with a fail indication if the flag is set to the particular state.
摘要:
According to a method of simulation processing, a collection of files including one or more HDL source files describing design entities collectively representing a digital design to be simulated is received. The HDL source file(s) include a statement specifying inclusion of an instrumentation entity not forming a portion of the digital design but enabling observation of its operation during simulation. The instrumentation entity includes sequential logic containing at least one storage element, where the instrumentation entity has an output signal indicative of occurrence of a simulation event. The collection of files is processed to obtain an instrumented simulation executable model. The processing includes instantiating at least one instance of each of the plurality of design entities and instantiating the instrumentation entity. The processing further includes instantiating external instrumentation logic, logically coupled to each instance of the instrumentation entity, to record occurrences of the event.
摘要:
According to a method of simulation processing, a simulation model is received that includes a plurality of design entity instances modeling a digital system and one or more instrumentation entity instances, separate from the plurality of design entity instances, that generate instances of instrumentation events for testing purposes during simulation. In response to receiving an exclusion list identifying at least one instance of one or more instrumentation events to be removed from the simulation model, at least one instance of the one or more instrumentation events and associated logic elements are removed from the one or more instrumentation entity instances of the simulation model prior to simulation, such that a more compact simulation model is obtained.
摘要:
According to a method of simulation processing, a collection of files including one or more HDL source files describing design entities collectively representing a digital design to be simulated is received. The HDL source file(s) include a statement specifying inclusion of an instrumentation entity not forming a portion of the digital design but enabling observation of its operation during simulation. The instrumentation entity includes sequential logic containing at least one storage element, where the instrumentation entity has an output signal indicative of occurrence of a simulation event. The collection of files is processed to obtain an instrumented simulation executable model. The processing includes instantiating at least one instance of each of the plurality of design entities and instantiating the instrumentation entity. The processing further includes instantiating external instrumentation logic, logically coupled to each instance of the instrumentation entity, to record occurrences of the event.