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embedded functions in not supported

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This commit is contained in:
jand 2003-07-31 20:32:50 +00:00
parent 22fb4b309b
commit 4000304246
2 changed files with 46 additions and 9 deletions
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20
myhdl/_always_comb.py
View File

@ -53,6 +53,11 @@ class ScopeError(Error):
class SignalAsInoutError(Error):
"""signal used as inout in always_comb function argument"""
class EmbeddedFunctionError(Error):
"""embedded functions in always_comb function argument not supported"""
def always_comb(func):
@ -81,6 +86,7 @@ class _SigNameVisitor(object):
def __init__(self, sigdict):
self.inputs = []
self.outputs = []
self.toplevel = 1
self.sigdict = sigdict
def visitModule(self, node):
@ -91,7 +97,15 @@ class _SigNameVisitor(object):
if n in outputs:
raise SignalAsInoutError(n)
def visitFunction(self, node):
if self.toplevel:
self.toplevel = 0 # skip embedded functions
self.visit(node.code)
else:
raise EmbeddedFunctionError
def visitName(self, node, access=INPUT):
print node.name
if node.name not in self.sigdict:
return
if access == INPUT:
@ -127,6 +141,12 @@ class _SigNameVisitor(object):
self.visit(node.node, INOUT)
self.visit(node.expr, INPUT)
def visitClass(self, node):
pass # skip
def visitExec(self, node):
pass # skip
class _AlwaysComb(object):

35
myhdl/test_always_comb.py
View File

@ -37,7 +37,7 @@ from myhdl import Signal, Simulation, instances, processes, \
from myhdl._always_comb import always_comb, _AlwaysComb, \
ScopeError, ArgumentError, NrOfArgsError, \
SignalAsInoutError
SignalAsInoutError, EmbeddedFunctionError
QUIET=1
@ -48,6 +48,7 @@ def g():
x = Signal(0)
class AlwaysCombCompilationTest(TestCase):
def testArgIsFunction(self):
h = 5
@ -93,7 +94,7 @@ class AlwaysCombCompilationTest(TestCase):
c.next = a
v = u
g = always_comb(h)
i= g.gi_frame.f_locals['self']
i = g.gi_frame.f_locals['self']
expected = ['a']
self.assertEqual(i.inputs, expected)
@ -104,7 +105,7 @@ class AlwaysCombCompilationTest(TestCase):
c.next = x
g = a
g = always_comb(h)
i= g.gi_frame.f_locals['self']
i = g.gi_frame.f_locals['self']
expected = ['a', 'x']
expected.sort()
self.assertEqual(i.inputs, expected)
@ -117,7 +118,7 @@ class AlwaysCombCompilationTest(TestCase):
c.next = a + x + u
a = 1
g = always_comb(h)
i= g.gi_frame.f_locals['self']
i = g.gi_frame.f_locals['self']
expected = ['x']
self.assertEqual(i.inputs, expected)
@ -128,7 +129,7 @@ class AlwaysCombCompilationTest(TestCase):
c.next = a + x + u
x = 1
g = always_comb(h)
i= g.gi_frame.f_locals['self']
i = g.gi_frame.f_locals['self']
expected = ['a']
self.assertEqual(i.inputs, expected)
@ -162,7 +163,7 @@ class AlwaysCombCompilationTest(TestCase):
def h():
c.next[a:0] = x[b:0]
g = always_comb(h)
i= g.gi_frame.f_locals['self']
i = g.gi_frame.f_locals['self']
expected = ['a', 'b', 'x']
expected.sort()
self.assertEqual(i.inputs, expected)
@ -174,7 +175,7 @@ class AlwaysCombCompilationTest(TestCase):
v = 2
c.next[8:1+a+v] = x[4:b*3+u]
g = always_comb(h)
i= g.gi_frame.f_locals['self']
i = g.gi_frame.f_locals['self']
expected = ['a', 'b', 'x']
expected.sort()
self.assertEqual(i.inputs, expected)
@ -184,7 +185,7 @@ class AlwaysCombCompilationTest(TestCase):
def h():
c.next[a-1] = x[b-1]
g = always_comb(h)
i= g.gi_frame.f_locals['self']
i = g.gi_frame.f_locals['self']
expected = ['a', 'b', 'x']
expected.sort()
self.assertEqual(i.inputs, expected)
@ -196,11 +197,27 @@ class AlwaysCombCompilationTest(TestCase):
def h():
c.next = f(a, 2*b, d*x)
g = always_comb(h)
i= g.gi_frame.f_locals['self']
i = g.gi_frame.f_locals['self']
expected = ['a', 'b', 'd', 'x']
expected.sort()
self.assertEqual(i.inputs, expected)
def testEmbeddedFunction(self):
a, b, c, d = [Signal(0) for i in range(4)]
u = 1
def h():
def g():
e = b
return e
c.next = x
g = a
try:
g = always_comb(h)
except EmbeddedFunctionError:
pass
else:
self.fail()
class AlwaysCombSimulationTest(TestCase):