Parameterized port list is used for making the parameterized modules. Instead of designing the module with fixed port length.
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Case statement is usually used to model read-only memory (ROM). For some compiler or certain device family, either the address or the output has to be registered for ROM code to be inferred. block RAM resources could be used to implemented ROMs with synchronous outputs or address inputs.
In previous post, we discussed the definition of precise interrupt. In this post, we will cover the implementations, based on J.E. Smith and A.R. Pleszkun’s paper Implementing Precise Interrupt in Pipelined Processor.
A total of 4 approaches will be discussed:
Result shift register
Reorder buffer with bypass
From CPU’s perspective, the most important metric to measure cache performance is average memory access time.
Memory Access Time Definition 1
Average memory access time = cache hit rate x hit latency + (1 – cache hit rate) x miss penalty