mirror of https://github.com/YosysHQ/yosys.git
ice40_wrapcarry -unwrap to preserve 'src' attribute
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@ -121,16 +121,24 @@ struct Ice40WrapCarryPass : public Pass {
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lut->setPort(ID(A), {cell->getPort(ID(I0)), cell->getPort(ID(A)), cell->getPort(ID(B)), cell->getPort(ID(I3)) });
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lut->setPort(ID(Y), cell->getPort(ID(O)));
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Const src;
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for (const auto &a : cell->attributes)
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if (a.first.begins_with("\\SB_CARRY.\\"))
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carry->attributes[a.first.c_str() + strlen("\\SB_CARRY.")] = a.second;
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else if (a.first.begins_with("\\SB_LUT4.\\"))
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lut->attributes[a.first.c_str() + strlen("\\SB_LUT4.")] = a.second;
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else if (a.first.in(ID(SB_LUT4.name), ID::keep, ID(module_not_derived), ID(src)))
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else if (a.first == ID(src))
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src = a.second;
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else if (a.first.in(ID(SB_LUT4.name), ID::keep, ID(module_not_derived)))
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continue;
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else
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log_abort();
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if (!src.empty()) {
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carry->attributes.insert(std::make_pair(ID(src), src));
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lut->attributes.insert(std::make_pair(ID(src), src));
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}
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module->remove(cell);
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}
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}
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