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back.pysim: handle out of bounds ArrayProxy indexes.

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This commit is contained in:
whitequark 2018-12-21 12:32:08 +00:00
parent 7ae7683fed
commit 48d13e47ec
2 changed files with 25 additions and 2 deletions
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15
nmigen/test/test_sim.py
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@ -184,6 +184,12 @@ class SimulatorUnitTestCase(FHDLTestCase):
self.assertStatement(stmt, [C(1)], C(4))
self.assertStatement(stmt, [C(2)], C(10))
def test_array_oob(self):
array = Array([1, 4, 10])
stmt = lambda y, a: y.eq(array[a])
self.assertStatement(stmt, [C(3)], C(10))
self.assertStatement(stmt, [C(4)], C(10))
def test_array_lhs(self):
l = Signal(3, reset=1)
m = Signal(3, reset=4)
@ -194,6 +200,15 @@ class SimulatorUnitTestCase(FHDLTestCase):
self.assertStatement(stmt, [C(1), C(0b010)], C(0b111010001))
self.assertStatement(stmt, [C(2), C(0b100)], C(0b100100001))
def test_array_lhs_oob(self):
l = Signal(3)
m = Signal(3)
n = Signal(3)
array = Array([l, m, n])
stmt = lambda y, a, b: [array[a].eq(b), y.eq(Cat(*array))]
self.assertStatement(stmt, [C(3), C(0b001)], C(0b001000000))
self.assertStatement(stmt, [C(4), C(0b010)], C(0b010000000))
def test_array_index(self):
array = Array(Array(x * y for y in range(10)) for x in range(10))
stmt = lambda y, a, b: y.eq(array[a][b])