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back.rtlil: don't emit connections to zero width ports.

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Fixes #335.
This commit is contained in:
whitequark 2020-04-13 17:04:13 +00:00
parent 792f35ac8f
commit ee73d39b8d
1 changed files with 2 additions and 1 deletions
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nmigen/back/rtlil.py
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@ -880,6 +880,7 @@ def _convert_fragment(builder, fragment, name_map, hierarchy):
if not isinstance(subfragment, ir.Instance): if not isinstance(subfragment, ir.Instance):
for signal in value._rhs_signals(): for signal in value._rhs_signals():
compiler_state.resolve_curr(signal, prefix=sub_name) compiler_state.resolve_curr(signal, prefix=sub_name)
if len(value) > 0:
sub_ports[port] = rhs_compiler(value) sub_ports[port] = rhs_compiler(value)
module.cell(sub_type, name=sub_name, ports=sub_ports, params=sub_params, module.cell(sub_type, name=sub_name, ports=sub_ports, params=sub_params,