def sim(request):
if request.param == "cpp_simulator":
from projectq.backends._sim._cppsim import Simulator as CppSim
sim = Simulator(gate_fusion=True)
sim._simulator = CppSim(1)
return sim
if request.param == "py_simulator":
from projectq.backends._sim._pysim import Simulator as PySim
sim = Simulator()
sim._simulator = PySim(1)
return sim
def sim(request):
if request.param == "cpp_simulator":
from projectq.backends._sim._cppsim import Simulator as CppSim
sim = Simulator(gate_fusion=True)
sim._simulator = CppSim(1)
# If an ImportError occurs, the C++ simulator was either not installed
# or compiled for a different Python version.
return sim
if request.param == "py_simulator":
from projectq.backends._sim._pysim import Simulator as PySim
sim = Simulator()
sim._simulator = PySim(1)
return sim
def test_simulator_constant_math_emulation():
if "cpp_simulator" not in get_available_simulators():
pytest.skip("No C++ simulator")
return
results = [[[1, 1, 0, 0, 0]], [[0, 1, 0, 0, 0]], [[0, 1, 1, 1, 0]]]
import projectq.backends._sim._simulator as _sim
from projectq.backends._sim._pysim import Simulator as PySim
from projectq.backends._sim._cppsim import Simulator as CppSim
from projectq.libs.math import (AddConstant, AddConstantModN,
MultiplyByConstantModN)
def gate_filter(eng, cmd):
g = cmd.gate
if isinstance(g, BasicMathGate):
return False
return eng.next_engine.is_available(cmd)
def run_simulation(sim):
eng = MainEngine(sim, [])
quint = eng.allocate_qureg(5)
AddConstant(3) | quint
All(Measure) | quint
eng.flush()
results[0].append([int(qb) for qb in quint])
AddConstantModN(4, 5) | quint
All(Measure) | quint
eng.flush()
results[1].append([int(qb) for qb in quint])
MultiplyByConstantModN(15, 16) | quint
All(Measure) | quint
eng.flush()
results[2].append([int(qb) for qb in quint])
cppsim = Simulator(gate_fusion=False)
cppsim._simulator = CppSim(1)
run_simulation(cppsim)
_sim.FALLBACK_TO_PYSIM = True
pysim = Simulator()
pysim._simulator = PySim(1)
# run_simulation(pysim)
for result in results:
ref = result[0]
for res in result[1:]:
assert ref == res
def test_simulator_flush():
sim = Simulator()
sim._simulator = MockSimulatorBackend()
eng = MainEngine(sim)
eng.flush()
assert sim._simulator.run_cnt == 1