def test_shift_register():
N = 4
Register4 = DefineRegister(4)
T = m.Bits[ N ]
class ShiftRegister(m.Circuit):
name = "ShiftRegister"
IO = ["I", m.In(T), "O", m.Out(T), "CLK", m.In(m.Clock)]
@classmethod
def definition(io):
regs = [Register4() for _ in range(N)]
m.wire(io.I, regs[0].I)
m.fold(regs, foldargs={"I": "O"})
m.wire(regs[-1].O, io.O)
simulator = PythonSimulator(ShiftRegister, clock=ShiftRegister.CLK)
expected = [0, 0, 0] + list(range(0, 1 << N, 3))[:-3]
actual = []
for i in range(0, 1 << N, 3):
simulator.set_value(ShiftRegister.I, i)
simulator.advance(2)
actual.append(simulator.get_value(ShiftRegister.O))
assert actual == expected
m.compile("build/ShiftRegister", ShiftRegister, output="coreir")
assert m.testing.check_files_equal(__file__, "build/ShiftRegister.json",
"gold/ShiftRegister.json")
def check(circuit, sim, number_of_cycles, inputs_generator=None):
simulator = PythonSimulator(circuit, clock=circuit.CLK)
failed = False
for cycle in range(number_of_cycles):
if inputs_generator is None:
next(sim)
else:
inputs = []
for name, port in circuit.interface.ports.items():
if name in ["CLK", "CE"]:
continue # Skip clocks, TODO: Check the type
if port.isoutput(): # circuit input
input_value = getattr(inputs_generator, name)
inputs.append(input_value)
simulator.set_value(getattr(circuit, name), input_value)
next(inputs_generator)
if len(inputs) > 1:
sim.send(inputs)
elif len(inputs) == 1:
sim.send(inputs[0])
else:
next(sim)
simulator.advance(2)
# Coroutine has an implicit __next__ call on construction so it already
# is in it's initial state
for name, port in circuit.interface.ports.items():
if port.isinput(): # circuit output
if getattr(sim, name) != BitVector(
simulator.get_value(getattr(circuit, name))):
print(
f"Failed on cycle {cycle}, port {name}, expected {getattr(sim, name)}, got {BitVector(simulator.get_value(getattr(circuit, name)))}"
)
failed = True
assert not failed, "Failed to pass simulation"
def test():
args = ['I', In(Bit), 'O', Out(Bit)]
args += ClockInterface(False, False, False)
testcircuit = DefineCircuit('TestCircuit', *args)
ff = PRIM_FF()
wire(testcircuit.I, ff.D)
wire(ff.Q, testcircuit.O)
EndCircuit()
sim = PythonSimulator(testcircuit, testcircuit.CLK)
sim.evaluate()
val = sim.get_value(testcircuit.O)
assert (val == False)
sim.advance()
val = sim.get_value(testcircuit.O)
assert (val == False)
sim.set_value(testcircuit.I, True)
sim.evaluate()
val = sim.get_value(testcircuit.O)
assert (val == False)
sim.advance()
val = sim.get_value(testcircuit.O)
assert (val == True)
sim.advance()
val = sim.get_value(testcircuit.O)
assert (val == True)
def test_shift_register():
N = 4
Register4 = DefineRegister(4)
T = Bits(N)
class ShiftRegister(Circuit):
name = "ShiftRegister"
IO = ["I", In(T), "O", Out(T), "CLK", In(Clock)]
@classmethod
def definition(io):
regs = [Register4() for _ in range(N)]
wireclock(io, regs)
wire(io.I, regs[0].I)
fold(regs, foldargs={"I": "O"})
wire(regs[-1].O, io.O)
simulator = PythonSimulator(ShiftRegister, clock=ShiftRegister.CLK)
expected = [0, 0, 0] + list(range(0, 1 << N, 3))[:-3]
actual = []
for i in range(0, 1 << N, 3):
simulator.set_value(ShiftRegister.I, uint(i, N))
simulator.advance(2)
actual.append(seq2int(simulator.get_value(ShiftRegister.O)))
assert actual == expected
def test_shift_sim():
Shift = DefineLSL(8, 4)
lsl_sim = PythonSimulator(Shift)
I = BitVector(0x01, 8)
O = BitVector(0x10, 8)
lsl_sim.set_value(Shift.I, I)
lsl_sim.evaluate()
assert lsl_sim.get_value(Shift.O) == O
def test():
args = ['I0', In(Bit), 'I1', In(Bit), 'O',
Out(Bit)] + ClockInterface(False, False, False)
testcircuit = DefineCircuit('TestCircuit', *args)
andy = PRIM_AND()
ori = PRIM_OR()
ori2 = PRIM_OR()
n = PRIM_NOT()
wire(testcircuit.I0, andy.I0)
wire(testcircuit.I1, andy.I1)
wire(testcircuit.I0, ori.I0)
wire(testcircuit.I1, n.I)
wire(n.O, ori.I1)
wire(ori.O, ori2.I0)
wire(andy.O, ori2.I1)
wire(ori2.O, testcircuit.O)
EndCircuit()
sim = PythonSimulator(testcircuit)
sim.evaluate()
v = sim.get_value(testcircuit.O)
assert v == True
sim.set_value(testcircuit.I1, True)
sim.evaluate()
v = sim.get_value(testcircuit.O)
assert v == False
sim.set_value(testcircuit.I0, True)
sim.evaluate()
v = sim.get_value(testcircuit.O)
assert v == True
def test_ramb():
main = DefineCircuit("test_ramb",
"RDATA", Out(Bits(8)),
"WDATA", In(Bits(8)),
"WE", In(Bit),
"CLK", In(Clock))
ramb = RAMB(512, 8, [0b00000001, 0b11111111] + [0] * 510)
wire(ramb.RADDR, uint(1, 9))
wire(ramb.RCLK, main.CLK)
wire(ramb.RE, 1)
wire(ramb.WADDR, uint(1, 9))
wire(ramb.WCLK, main.CLK)
wire(ramb.WE, main.WE)
wire(ramb.RDATA, main.RDATA)
wire(ramb.WDATA, main.WDATA)
EndCircuit()
sim = PythonSimulator(main, clock=main.CLK)
sim.set_value(main.WE, False)
sim.evaluate()
sim.advance(2)
assert BitVector(sim.get_value(main.RDATA)) == BitVector(0b11111111, num_bits=8)
# Write 0xBE to WADDR = 1
sim.set_value(main.WE, True)
sim.set_value(main.WDATA, BitVector(0xBE, num_bits=8))
sim.advance(2)
# Read RADDR = 1 again
sim.set_value(main.WE, False)
sim.evaluate()
sim.advance(2)
assert BitVector(sim.get_value(main.RDATA)) == BitVector(0xBE, num_bits=8)
def clb(a, b, c, d):
return (a & b) | (~c & d)
T = UInt(16)
class Combinational(Circuit):
name = "Combinational"
IO = ["a", In(T), "b", In(T), "c", Out(T)]
@classmethod
def definition(io):
wire(clb(io.a, io.b, io.a, io.b), io.c)
# In[3]:
from magma.simulator import PythonSimulator
from magma.bit_vector import BitVector
simulator = PythonSimulator(Combinational)
a = BitVector(148, num_bits=16)
b = BitVector(41, num_bits=16)
simulator.set_value(Combinational.a, a)
simulator.set_value(Combinational.b, b)
simulator.evaluate()
assert simulator.get_value(Combinational.c) == clb(a, b, a, b)
print("Success!")
m.wire(io.I, getattr(regs[0], "in"))
m.fold(regs, foldargs={"in":"out"})
m.wire(regs[-1].out, io.O)
# In[2]:
from magma.backend.verilog import compile as compile_verilog
print(compile_verilog(ShiftRegister))
# In[3]:
from magma.simulator import PythonSimulator
from magma.bit_vector import BitVector
simulator = PythonSimulator(ShiftRegister, clock=ShiftRegister.CLK)
outputs = []
for i in range(0, 1 << N):
simulator.set_value(ShiftRegister.I, BitVector(i, N))
for j in range(2):
simulator.step()
simulator.evaluate()
O = simulator.get_value(ShiftRegister.O)
outputs.append(BitVector(O))
print([val.as_int() for val in outputs])
adder2 = FullAdder()
wire(io.a[1], adder2.a)
wire(io.b[1], adder2.b)
wire(adder1.cout, adder2.cin)
adder3 = FullAdder()
wire(io.a[2], adder3.a)
wire(io.b[2], adder3.b)
wire(adder2.cout, adder3.cin)
adder4 = FullAdder()
wire(io.a[3], adder4.a)
wire(io.b[3], adder4.b)
wire(adder3.cout, adder4.cin)
wire(adder4.cout, io.cout)
wire(bits([adder1.out, adder2.out, adder3.out, adder4.out]), io.out)
# In[3]:
from magma.simulator import PythonSimulator
from magma.bit_vector import BitVector
simulator = PythonSimulator(Adder4)
simulator.set_value(Adder4.a, BitVector(2, num_bits=4))
simulator.set_value(Adder4.b, BitVector(3, num_bits=4))
simulator.set_value(Adder4.cin, True)
simulator.evaluate()
assert simulator.get_value(Adder4.out) == BitVector(6, num_bits=4)
assert simulator.get_value(Adder4.cout) == False
print("Success!")
one_hot_mux([is_op0, is_op1, is_op2, is_op3],
[op0_out, op1_out, op2_out, op3_out]))
# In[2]:
m.compile("build/SimpleALU", SimpleALU, output="coreir")
get_ipython().magic('cat build/SimpleALU.json')
# In[3]:
from magma.simulator import PythonSimulator
from magma.bit_vector import BitVector
simulator = PythonSimulator(SimpleALU)
simulator.set_value(SimpleALU.a, BitVector(3, num_bits=4))
simulator.set_value(SimpleALU.b, BitVector(2, num_bits=4))
simulator.set_value(SimpleALU.opcode, BitVector(0, num_bits=2))
simulator.evaluate()
assert BitVector(simulator.get_value(SimpleALU.out)) == BitVector(
3 + 2, num_bits=4), simulator.get_value(SimpleALU.out)
simulator.set_value(SimpleALU.a, BitVector(3, num_bits=4))
simulator.set_value(SimpleALU.b, BitVector(2, num_bits=4))
simulator.set_value(SimpleALU.opcode, BitVector(1, num_bits=2))
simulator.evaluate()
assert BitVector(simulator.get_value(SimpleALU.out)) == BitVector(3 - 2,
num_bits=4)
simulator.set_value(SimpleALU.a, BitVector(3, num_bits=4))
simulator.set_value(SimpleALU.b, BitVector(2, num_bits=4))
simulator.set_value(SimpleALU.opcode, BitVector(2, num_bits=2))
wire(regs[-1].out, io.O)
# In[2]:
from magma.backend.verilog import compile as compile_verilog
print(compile_verilog(ResetShiftRegister))
# In[3]:
from magma.simulator import PythonSimulator
from magma.bit_vector import BitVector
simulator = PythonSimulator(ResetShiftRegister, clock=ResetShiftRegister.CLK)
outputs = []
simulator.set_value(ResetShiftRegister.reset, True)
for i in range(0, 1 << N):
simulator.set_value(ResetShiftRegister.I, BitVector(i, N))
for j in range(2):
if i == 9:
if j == 0:
simulator.set_value(ResetShiftRegister.reset, False)
else:
simulator.set_value(ResetShiftRegister.reset, True)
simulator.step()
simulator.evaluate()
O = simulator.get_value(ResetShiftRegister.O)
outputs.append(BitVector(O).as_int())
print(outputs)
# coding: utf-8
# In[1]:
from magma import *
class Combinational(Circuit):
name = "Combinational"
IO = ["x", In(UInt(16)), "y", In(UInt(16)), "z", Out(UInt(16))]
@classmethod
def definition(io):
wire(io.x + io.y, io.z)
# In[2]:
from magma.simulator import PythonSimulator
from magma.bit_vector import BitVector
simulator = PythonSimulator(Combinational)
simulator.set_value(Combinational.x, BitVector(76, num_bits=16))
simulator.set_value(Combinational.y, BitVector(43, num_bits=16))
simulator.evaluate()
assert simulator.get_value(Combinational.z) == BitVector(76 + 43, num_bits=16)
print("Success!")
class PythonTester(InteractiveTester):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.simulator = PythonSimulator(self._circuit, self.clock)
def eval(self):
self.simulator.evaluate()
def _set_value(self, port, value):
port, scope = _process_port(port)
self.simulator.set_value(port, value, scope)
def _poke(self, port, value, delay=None):
if delay is not None:
raise NotImplementedError("delay is not support in Python "
"simulator")
type_ = get_port_type(port)
self._set_value(port, value)
def process_result(self, type_, result):
if issubclass(type_, m.Digital):
return Bit(result)
if issubclass(type_, m.Bits):
return BitVector[len(type_)](result)
if is_recursive_type(type_):
return BitVector[len(type_)](result)
return result
def _get_value(self, port):
port, scope = _process_port(port)
if isinstance(port, (int, BitVector, Bit, list)):
return port
result = self.simulator.get_value(port, scope)
return self.process_result(type(port), result)
def _expect(self, port, value, strict=None, caller=None, **kwargs):
got = self._get_value(port)
port, scope = _process_port(port)
value = make_value(type(port), value)
expected = self._get_value(value)
check(got, port, expected)
def peek(self, port):
return self._get_value(port)
def print(self, format_str, *args):
got = [self._get_value(port) for port in args]
values = ()
for value, port in zip(got, args):
if (isinstance(port, m.Array) and issubclass(port.T, m.Digital)):
value = BitVector[len(port)](value).as_uint()
elif isinstance(port, m.Array):
raise NotImplementedError("Printing complex nested " "arrays")
values += (value, )
print(format_str % values, end="")
def assert_(self, expr, msg=""):
assert expr, msg
def delay(self, time):
raise NotImplementedError()
def get_value(self, port):
raise NotImplementedError()
def step(self, steps=1):
"""
Step the clock `steps` times.
"""
self.eval()
self.simulator.advance(steps)
def wait_until_low(self, signal):
while self.peek(signal):
self.step()
def wait_until_high(self, signal):
while ~self.peek(signal):
self.step()
def __call__(self, *args, **kwargs):
result = super().__call__(*args, **kwargs)
if isinstance(result, tuple):
return tuple(self.peek(r.select_path) for r in result)
return self.peek(result.select_path)
