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hdl._mem: add MemoryData class.

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This implements half of RFC 62. The `MemoryData._Row` class will be
implemented later, as a follow-up.
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Wanda 2024-03-28 03:06:39 +01:00 • committed by Catherine
parent 1deaf70ad9
commit 09d5540430
12 changed files with 280 additions and 195 deletions
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docs/changes.rst
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@ -53,6 +53,7 @@ Implemented RFCs
.. _RFC 51: https://amaranth-lang.org/rfcs/0051-const-from-bits.html
.. _RFC 53: https://amaranth-lang.org/rfcs/0053-ioport.html
.. _RFC 55: https://amaranth-lang.org/rfcs/0055-lib-io.html
.. _RFC 62: https://amaranth-lang.org/rfcs/0062-memory-data.html
* `RFC 17`_: Remove ``log2_int``
* `RFC 27`_: Testbench processes for the simulator
@ -75,6 +76,7 @@ Language changes
* Added: :class:`Format` objects, :class:`Print` statements, messages in :class:`Assert`, :class:`Assume` and :class:`Cover`. (`RFC 50`_)
* Added: :meth:`ShapeCastable.from_bits` method. (`RFC 51`_)
* Added: IO values, :class:`IOPort` objects, :class:`IOBufferInstance` objects. (`RFC 53`_)
* Added: :class:`MemoryData` objects. (`RFC 62`_)
* Changed: ``m.Case()`` with no patterns is never active instead of always active. (`RFC 39`_)
* Changed: ``Value.matches()`` with no patterns is ``Const(0)`` instead of ``Const(1)``. (`RFC 39`_)
* Changed: ``Signal(range(stop), init=stop)`` warning has been changed into a hard error and made to trigger on any out-of range value.