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* Support Memory Initialization for Simulation and FPGA Flows
This adds a minimal annotation that allows users to
influence if memories are randomly initialized,
if all entries are initialized to the same scalar or
if each entry should be initialized to a different value.
We use the init block in order to initialize memories
which is supported by verilator as well as yosys
and has previously been used to randomize the initial
memory contents.
* LowerTypes: error when trying to split up a memory with MemoryInitAnnotation
Currently the MemoryInitAnnotation only works for
ground-type memories.
We catch misuse of this annotation at the point of
the firrtl compiler at which memories on non-ground type
get split up, i.e., the LowerTypes transform.
Chisel should try to prevent annotating non-ground
type memories in the frontend, but it is nice to
have an additional check.
* MemoryInitSpec: test JSON deserialization
* MemoryInitAnnotation: split up into three different annotations instead of exposing MemoryInitValue
Co-authored-by: Albert Magyar <albert.magyar@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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* Pull out common test utilities into a separate package
* Project a fat jar for test utilities
Co-authored-by: Albert Magyar <albert.magyar@gmail.com>
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Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
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This includes the built-in functions in BackendCompilationUtilities
which are a public API
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