High-Performance Embedded Computing

2.8 CPU Simulation 131

code for the simulation by adding instructions to compute the target state that

has to be simulated. Because much of the simulation runs as native code on the

host machine, direct execution can be very fast.

2.8.3 Microarchitecture-Modeling Simulators

modeling detail

and accuracy

We can provide more detailed performance and power measurements by build-

ing a simulator that models the internal microarchitecture of the computer.

Directly simulating the logic would provide even more accurate results but

would be much too slow, preventing us from running the long traces that we

need to judge system performance. Logic simulation also requires us to have the

logic design, which is not generally available from the CPU supplier. But in ...