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hdl.ir: cast instance port connections to Values.

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Fixes #249.
This commit is contained in:
whitequark 2019-10-13 03:19:17 +00:00
parent 13650acbbc
commit 722b3879f4
2 changed files with 20 additions and 4 deletions
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8
nmigen/hdl/ir.py
View file

@ -563,7 +563,7 @@ class Instance(Fragment):
elif kind == "p":
self.parameters[name] = value
elif kind in ("i", "o", "io"):
self.named_ports[name] = (value, kind)
self.named_ports[name] = (Value.cast(value), kind)
else:
raise NameError("Instance argument {!r} should be a tuple (kind, name, value) "
"where kind is one of \"p\", \"i\", \"o\", or \"io\""
@ -575,11 +575,11 @@ class Instance(Fragment):
elif kw.startswith("p_"):
self.parameters[kw[2:]] = arg
elif kw.startswith("i_"):
self.named_ports[kw[2:]] = (arg, "i")
self.named_ports[kw[2:]] = (Value.cast(arg), "i")
elif kw.startswith("o_"):
self.named_ports[kw[2:]] = (arg, "o")
self.named_ports[kw[2:]] = (Value.cast(arg), "o")
elif kw.startswith("io_"):
self.named_ports[kw[3:]] = (arg, "io")
self.named_ports[kw[3:]] = (Value.cast(arg), "io")
else:
raise NameError("Instance keyword argument {}={!r} does not start with one of "
"\"p_\", \"i_\", \"o_\", or \"io_\""

16
nmigen/test/test_hdl_ir.py
View file

@ -667,6 +667,22 @@ class InstanceTestCase(FHDLTestCase):
("s6", (s6, "io")),
]))
def test_cast_ports(self):
inst = Instance("foo",
("i", "s1", 1),
("o", "s2", 2),
("io", "s3", 3),
i_s4=4,
o_s5=5,
io_s6=6,
)
self.assertRepr(inst.named_ports["s1"][0], "(const 1'd1)")
self.assertRepr(inst.named_ports["s2"][0], "(const 2'd2)")
self.assertRepr(inst.named_ports["s3"][0], "(const 2'd3)")
self.assertRepr(inst.named_ports["s4"][0], "(const 3'd4)")
self.assertRepr(inst.named_ports["s5"][0], "(const 3'd5)")
self.assertRepr(inst.named_ports["s6"][0], "(const 3'd6)")
def test_wrong_construct_arg(self):
s = Signal()
with self.assertRaises(NameError,