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hdl.ast: deprecate shapes like (1, True) in favor of signed(1).

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This is a great improvement in clarity.
This commit is contained in:
whitequark 2019-10-11 13:22:08 +00:00
parent 706bfaf5e1
commit a658cb2bbf
6 changed files with 189 additions and 171 deletions
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4
nmigen/back/rtlil.py
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@ -464,7 +464,7 @@ class _RHSValueCompiler(_ValueCompiler):
def match_shape(self, value, new_bits, new_sign):
if isinstance(value, ast.Const):
return self(ast.Const(value.value, (new_bits, new_sign)))
return self(ast.Const(value.value, ast.Shape(new_bits, new_sign)))
value_bits, value_sign = value.shape()
if new_bits <= value_bits:
@ -511,7 +511,7 @@ class _RHSValueCompiler(_ValueCompiler):
res = self.s.rtlil.wire(width=res_bits, src=src(value.src_loc))
self.s.rtlil.cell("$mux", ports={
"\\A": divmod_res,
"\\B": self(ast.Const(0, (res_bits, res_sign))),
"\\B": self(ast.Const(0, ast.Shape(res_bits, res_sign))),
"\\S": self(lhs == 0),
"\\Y": res,
}, params={