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Simulate a flattened netlist of the component - #67
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Add a revision counter to CCStore that increases on every change to the circuit (components, component pins, node registration and config, node pins, connections). Moving a node does not change the circuit, so it does not count. Anything derived from the circuit can be cached against this number. Extracted from 788b5c9 (WIP: netlist-based simulation). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Replace the recursive per-component evaluation with a netlist built from the store: the component hierarchy is flattened into intrinsic node instances, pins carrying the same value are grouped into nets, and the instances are sorted so that each one is evaluated after its drivers. Intrinsic components can now be marked as sequential. A sequential instance (the FlipFlop) derives its outputs from the previous time step, so it does not wait for its inputs, which lets a circuit contain a feedback loop through it, including one that runs through a user-defined component. A loop without one is reported as a SimulationCombinationalLoopError instead of hanging, and an unconnected input pin as a SimulationUnconnectedPinError. The netlist is cached against the store revision, and the editor keys its frame cache on the revision and the input values only. Extracted from 788b5c9 (WIP: netlist-based simulation). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
When the circuit cannot be simulated, for example because a loop has no flip-flop to break it or an input pin is unconnected, keep the error message in the editor store, switch back to edit mode and show the message in a snackbar. A failed circuit is not simulated again until it or its input values change, or the editor mode is switched. Extracted from 788b5c9 (WIP: netlist-based simulation). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The evaluation functions of the intrinsic components were still written against the per-component frames of the old simulation, so the netlist simulation wrapped every instance in a frame holding that one node, let the function write its outputs into it and read them back. Replace `evaluate` and `isSequential` with a `behavior` that is either combinational, computing the outputs from the current inputs, or sequential, computing them from the inputs of the previous time step. A sequential behavior cannot see the current inputs at all, since it is evaluated before they are known. Input and Output have no behavior, as they are resolved away while flattening. The simulation now hands the input values grouped by pin key to the function and writes the returned values to the nets. Errors thrown while evaluating are rethrown with the instance they come from. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Now that the evaluation functions are pure, cover each intrinsic on its own: the bitwise operators, the constants, Aggregate/Decompose/Broadcast, the AndN/OrN reductions, the initial value of the FlipFlop, and which intrinsics are sequential or have no behavior at all. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Follow #63 in the netlist module, which was added after the rest of the codebase had been migrated. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Rework the simulation so that a circuit can contain a feedback loop through a flip-flop, including one that runs through a user-defined component.
The first three commits are taken from the WIP commit 788b5c9 on
wip-simulation-netlistby @chelproc, split by concern. The change that disables pin property editing outside edit mode is left there.src/store/netlist.ts). The netlist is cached against a new store revision counter.SimulationCombinationalLoopError) and an unconnected input pin (SimulationUnconnectedPinError) instead of hanging, and show the error in the editor, falling back to edit mode.evaluateandisSequentialare replaced with abehaviorthat is eithercombinational(from the current inputs) orsequential(from the inputs of the previous time step, without access to the current ones). Input and Output have no behavior, as they are resolved away while flattening.Testing
src/store/simulation.test.ts) and the evaluation of each intrinsic (src/store/intrinsics/definitions.test.ts);tscand the tests pass on every commit.🤖 Generated with Claude Code