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Expand semantics of Array from MutableSequence to MutableMapping #66

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whitequark opened this issue May 12, 2019 · 2 comments
Open

Expand semantics of Array from MutableSequence to MutableMapping #66

whitequark opened this issue May 12, 2019 · 2 comments
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@whitequark
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An Array is essentially a mux, and there are several equally valid ways to drive a mux. Currently only straight binary is supported. It would be nice to also have one-hot and priority encodings, since all of these are trivially representable directly in RTLIL and Verilog.

One thing to note is that one-hot and priority are one and the same unless parallel_case is used.
@whitequark whitequark added this to the 0.1 milestone Sep 18, 2019
@whitequark
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The most idiomatic way to do this is to make the Array associative, and make sure that initializing it with a list uses consecutive indices. (The indices still all have to be integers; possibly enums?)

@whitequark whitequark changed the title Allow changing encoding for Array Expand semantics of Array from MutableSequence to MutableDictionary Sep 18, 2019
@whitequark whitequark changed the title Expand semantics of Array from MutableSequence to MutableDictionary Expand semantics of Array from MutableSequence to MutableMapping Sep 21, 2019
@whitequark
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This is a self-contained feature that doesn't have backwards compatibility concerns, so it doesn't have to be in 0.1.

@whitequark whitequark removed this from the 0.1 milestone Oct 12, 2019
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@whitequark