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back.rtlil: fix lowering of Part() on LHS to account for stride.

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This commit is contained in:
whitequark 2019-10-26 01:52:34 +00:00
parent 51269ad4a0
commit ffd10e3042
2 changed files with 36 additions and 2 deletions
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8
nmigen/back/rtlil.py
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@ -622,9 +622,13 @@ class _LHSValueCompiler(_ValueCompiler):
def on_Part(self, value):
offset = self.s.expand(value.offset)
if isinstance(offset, ast.Const):
return self(ast.Slice(value.value, offset.value, offset.value + value.width))
return self(ast.Slice(value.value,
offset.value * value.stride,
offset.value * value.stride + value.width))
else:
raise LegalizeValue(value.offset, range((1 << len(value.offset))), value.src_loc)
raise LegalizeValue(value.offset,
range((1 << len(value.offset)) // value.stride),
value.src_loc)
def on_Repl(self, value):
raise TypeError # :nocov: