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back.rtlil: explicitly set the top module.

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whitequark 2018-12-13 03:50:04 +00:00
parent 4df5c5de65
commit 2c67a620ee
1 changed files with 15 additions and 8 deletions
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23
nmigen/back/rtlil.py
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@ -42,19 +42,25 @@ class _Bufferer:
class _Builder(_Namer, _Bufferer): class _Builder(_Namer, _Bufferer):
def module(self, name=None): def module(self, name=None, attrs={}):
name = self._make_name(name, local=False) name = self._make_name(name, local=False)
return _ModuleBuilder(self, name) return _ModuleBuilder(self, name, attrs)
class _ModuleBuilder(_Namer, _Bufferer): class _ModuleBuilder(_Namer, _Bufferer):
def __init__(self, rtlil, name): def __init__(self, rtlil, name, attrs):
super().__init__() super().__init__()
self.rtlil = rtlil self.rtlil = rtlil
self.name = name self.name = name
self.attrs = {"generator": "nMigen"}
self.attrs.update(attrs)
def __enter__(self): def __enter__(self):
self._append("attribute \\generator \"{}\"\n", "nMigen") for name, value in self.attrs.items():
if isinstance(value, str):
self._append("attribute \\{} \"{}\"\n", name, value.replace("\"", "\\\""))
else:
self._append("attribute \\{} {}\n", name, int(value))
self._append("module {}\n", self.name) self._append("module {}\n", self.name)
return self return self
@ -390,8 +396,8 @@ class _ValueTransformer(xfrm.ValueTransformer):
return "{{ {} }}".format(" ".join(self(node.value) for _ in range(node.count))) return "{{ {} }}".format(" ".join(self(node.value) for _ in range(node.count)))
def convert_fragment(builder, fragment, name, clock_domains): def convert_fragment(builder, fragment, name, top, clock_domains):
with builder.module(name) as module: with builder.module(name, attrs={"top": 1} if top else {}) as module:
xformer = _ValueTransformer(module) xformer = _ValueTransformer(module)
# Register all signals driven in the current fragment. This must be done first, as it # Register all signals driven in the current fragment. This must be done first, as it
@ -416,7 +422,8 @@ def convert_fragment(builder, fragment, name, clock_domains):
# name) names. # name) names.
for subfragment, sub_name in fragment.subfragments: for subfragment, sub_name in fragment.subfragments:
sub_name, sub_port_map = \ sub_name, sub_port_map = \
convert_fragment(builder, subfragment, sub_name, clock_domains) convert_fragment(builder, subfragment, top=False, name=sub_name,
clock_domains=clock_domains)
with xformer.hierarchy(sub_name): with xformer.hierarchy(sub_name):
module.cell(sub_name, name=sub_name, ports={ module.cell(sub_name, name=sub_name, ports={
p: xformer(s) for p, s in sub_port_map.items() p: xformer(s) for p, s in sub_port_map.items()
@ -510,5 +517,5 @@ def convert(fragment, ports=[], clock_domains={}):
ins, outs = fragment._propagate_ports(ports, clock_domains) ins, outs = fragment._propagate_ports(ports, clock_domains)
builder = _Builder() builder = _Builder()
convert_fragment(builder, fragment, "top", clock_domains) convert_fragment(builder, fragment, name="top", top=True, clock_domains=clock_domains)
return str(builder) return str(builder)