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test_openqasm3.jl
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using BraketSimulator.Quasar, Statistics, LinearAlgebra, BraketSimulator, BraketSimulator.Observables
get_tol(shots::Int) = return (
shots > 0 ? Dict("atol" => 0.1, "rtol" => 0.15) : Dict("atol" => 0.01, "rtol" => 0)
)
@testset "Quasar" begin
@testset "QasmExpression" begin
@testset "Printing" begin
expr = Quasar.QasmExpression(:head, Quasar.QasmExpression(:integer_literal, 2))
@test sprint(show, expr) == "QasmExpression :head\n└─ QasmExpression :integer_literal\n └─ 2\n"
bad_expression = Quasar.QasmExpression(:invalid_expression, Quasar.QasmExpression(:error))
err = Quasar.QasmVisitorError("unable to evaluate expression $bad_expression")
@test sprint(showerror, err) == "QasmVisitorError: unable to evaluate expression $bad_expression"
end
@testset "Expression basics" begin
expr = Quasar.QasmExpression(:head, Quasar.QasmExpression(:integer_literal, 2))
@test length(expr) == 1
push!(expr, Quasar.QasmExpression(:integer_literal, 3))
@test length(expr.args) == 2
append!(expr, Quasar.QasmExpression(:integer_literal, 4))
@test length(expr.args) == 3
append!(expr, [Quasar.QasmExpression(:integer_literal, 5), Quasar.QasmExpression(:integer_literal, 6)])
@test length(expr.args) == 5
end
@testset "Equality" begin
expr_a = Quasar.QasmExpression(:head, Quasar.QasmExpression(:integer_literal, 2))
expr_b = Quasar.QasmExpression(:head, Quasar.QasmExpression(:float_literal, 2.2))
@test expr_a != expr_b
expr_a = Quasar.QasmExpression(:head, Quasar.QasmExpression(:integer_literal, 2))
@test expr_a == copy(expr_a)
end
@testset "Name undefined" begin
expr = Quasar.QasmExpression(:undef, Quasar.QasmExpression(:integer_literal, 2))
@test_throws Quasar.QasmVisitorError("name not defined for expressions of type undef") Quasar.name(expr)
end
end
@testset "Visiting/evaluating an invalid expression" begin
visitor = Quasar.QasmProgramVisitor()
bad_expression = Quasar.QasmExpression(:invalid_expression, Quasar.QasmExpression(:error))
@test_throws Quasar.QasmVisitorError("cannot visit expression $bad_expression.") visitor(bad_expression)
@test_throws Quasar.QasmVisitorError("unable to evaluate expression $bad_expression") Quasar.evaluate(visitor, bad_expression)
bad_expression = Quasar.QasmExpression(:invalid_expression, Quasar.QasmExpression(:error))
@test_throws Quasar.QasmVisitorError("unable to evaluate qubits for expression $bad_expression.") Quasar.evaluate_qubits(visitor, bad_expression)
cast_expression = Quasar.QasmExpression(:cast, Quasar.QasmExpression(:type_expr, Int32), Quasar.QasmExpression(:float_literal, 2.0))
@test_throws Quasar.QasmVisitorError("unable to evaluate cast expression $cast_expression") Quasar.evaluate(visitor, cast_expression)
end
@testset "Visitors and parents" begin
qasm = """
def flip(qubit q) {
x q;
}
qubit[2] qs;
flip(qs[0]);
"""
parsed = parse_qasm(qasm)
visitor = Quasar.QasmProgramVisitor()
visitor(parsed)
for_visitor = Quasar.QasmForLoopVisitor(visitor)
@test Quasar.function_defs(for_visitor) == Quasar.function_defs(visitor)
@test Quasar.qubit_defs(for_visitor) == Quasar.qubit_defs(visitor)
@test BraketSimulator.qubit_count(for_visitor) == Quasar.qubit_count(visitor)
push!(for_visitor, BraketSimulator.Amplitude("00"))
@test visitor.results[1] == BraketSimulator.Amplitude("00")
push!(for_visitor, [BraketSimulator.StateVector(), BraketSimulator.Probability()])
@test visitor.results[2] == BraketSimulator.StateVector()
@test visitor.results[3] == BraketSimulator.Probability()
push!(for_visitor, [BraketSimulator.Instruction(BraketSimulator.X(), 0), BraketSimulator.Instruction(BraketSimulator.Y(), 1)])
@test visitor.instructions == [BraketSimulator.Instruction(BraketSimulator.X(), 0), BraketSimulator.Instruction(BraketSimulator.X(), 0), BraketSimulator.Instruction(BraketSimulator.Y(), 1)]
gate_visitor = Quasar.QasmGateDefVisitor(visitor, Dict{String, FreeParameter}(), Dict{String, Quasar.Qubit}(), Dict{String, Vector{Int}}(), 0, BraketSimulator.Instruction[])
push!(gate_visitor, [BraketSimulator.Instruction(BraketSimulator.X(), 0), BraketSimulator.Instruction(BraketSimulator.Y(), 1)])
@test gate_visitor.instructions == [BraketSimulator.Instruction(BraketSimulator.X(), 0), BraketSimulator.Instruction(BraketSimulator.Y(), 1)]
function_visitor = Quasar.QasmFunctionVisitor(visitor, Quasar.QasmExpression[], Quasar.QasmExpression[])
push!(function_visitor, [BraketSimulator.Instruction(BraketSimulator.X(), 0), BraketSimulator.Instruction(BraketSimulator.Y(), 1)])
@test function_visitor.instructions == [BraketSimulator.Instruction(BraketSimulator.X(), 0), BraketSimulator.Instruction(BraketSimulator.Y(), 1)]
end
@testset "Sized types" begin
for (t_string, T) in (("SizedBitVector", Quasar.SizedBitVector),
("SizedInt", Quasar.SizedInt),
("SizedUInt", Quasar.SizedUInt),
("SizedFloat", Quasar.SizedFloat),
("SizedAngle", Quasar.SizedAngle),
("SizedComplex", Quasar.SizedComplex))
object = T(Quasar.QasmExpression(:integer_literal, 4))
@test sprint(show, object) == t_string * "{4}"
array_object = Quasar.SizedArray(object, (10,))
@test sprint(show, array_object) == "SizedArray{" * t_string * "{4}, 1}"
@test_throws BoundsError size(array_object, 1)
@test size(array_object, 0) == 10
new_object = T(object)
@test sprint(show, new_object) == t_string * "{4}"
end
bitvector = Quasar.SizedBitVector(Quasar.QasmExpression(:integer_literal, 10))
@test length(bitvector) == Quasar.QasmExpression(:integer_literal, 10)
@test size(bitvector) == (Quasar.QasmExpression(:integer_literal, 10),)
end
@testset "Adder" begin
sv_adder_qasm = """
OPENQASM 3;
input uint[4] a_in;
input uint[4] b_in;
gate majority a, b, c {
cnot c, b;
cnot c, a;
ccnot a, b, c;
}
gate unmaj a, b, c {
ccnot a, b, c;
cnot c, a;
cnot a, b;
}
qubit cin;
qubit[4] a;
qubit[4] b;
qubit cout;
// set input states
for int[8] i in [0: 3] {
if(bool(a_in[i])) x a[i];
if(bool(b_in[i])) x b[i];
}
// add a to b, storing result in b
majority cin, b[3], a[3];
for int[8] i in [3: -1: 1] { majority a[i], b[i - 1], a[i - 1]; }
cnot a[0], cout;
for int[8] i in [1: 3] { unmaj a[i], b[i - 1], a[i - 1]; }
unmaj cin, b[3], a[3];
// todo: subtle bug when trying to get a result type for both at once
#pragma braket result probability cout, b
#pragma braket result probability cout
#pragma braket result probability b
"""
parsed = parse_qasm(sv_adder_qasm)
visitor = QasmProgramVisitor(Dict("a_in"=>3, "b_in"=>7))
visitor(parsed)
@test visitor.qubit_count == 10
correct_instructions = [
BraketSimulator.Instruction(BraketSimulator.X(), BraketSimulator.QubitSet(6))
BraketSimulator.Instruction(BraketSimulator.X(), BraketSimulator.QubitSet(3))
BraketSimulator.Instruction(BraketSimulator.X(), BraketSimulator.QubitSet(7))
BraketSimulator.Instruction(BraketSimulator.X(), BraketSimulator.QubitSet(4))
BraketSimulator.Instruction(BraketSimulator.X(), BraketSimulator.QubitSet(8))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(4, 8))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(4, 0))
BraketSimulator.Instruction(BraketSimulator.CCNot(), BraketSimulator.QubitSet(0, 8, 4))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(3, 7))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(3, 4))
BraketSimulator.Instruction(BraketSimulator.CCNot(), BraketSimulator.QubitSet(4, 7, 3))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(2, 6))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(2, 3))
BraketSimulator.Instruction(BraketSimulator.CCNot(), BraketSimulator.QubitSet(3, 6, 2))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(1, 5))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(1, 2))
BraketSimulator.Instruction(BraketSimulator.CCNot(), BraketSimulator.QubitSet(2, 5, 1))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(1, 9))
BraketSimulator.Instruction(BraketSimulator.CCNot(), BraketSimulator.QubitSet(2, 5, 1))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(1, 2))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(2, 5))
BraketSimulator.Instruction(BraketSimulator.CCNot(), BraketSimulator.QubitSet(3, 6, 2))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(2, 3))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(3, 6))
BraketSimulator.Instruction(BraketSimulator.CCNot(), BraketSimulator.QubitSet(4, 7, 3))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(3, 4))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(4, 7))
BraketSimulator.Instruction(BraketSimulator.CCNot(), BraketSimulator.QubitSet(0, 8, 4))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(4, 0))
BraketSimulator.Instruction(BraketSimulator.CNot(), BraketSimulator.QubitSet(0, 8))
]
for (ix, c_ix) in zip(visitor.instructions, correct_instructions)
@test ix == c_ix
end
@test visitor.results == BraketSimulator.Result[BraketSimulator.Probability(BraketSimulator.QubitSet(9, 5, 6, 7, 8)),
BraketSimulator.Probability(BraketSimulator.QubitSet(9)),
BraketSimulator.Probability(BraketSimulator.QubitSet(5, 6, 7, 8))]
end
@testset "Randomized Benchmarking" begin
qasm = """
qubit[2] q;
bit[2] c;
h q[0];
cz q[0], q[1];
s q[0];
cz q[0], q[1];
s q[0];
z q[0];
h q[0];
measure q -> c;
"""
circuit = BraketSimulator.Circuit(qasm)
@test circuit.instructions == [BraketSimulator.Instruction(BraketSimulator.H(), 0),
BraketSimulator.Instruction(BraketSimulator.CZ(), [0, 1]),
BraketSimulator.Instruction(BraketSimulator.S(), 0),
BraketSimulator.Instruction(BraketSimulator.CZ(), [0, 1]),
BraketSimulator.Instruction(BraketSimulator.S(), 0),
BraketSimulator.Instruction(BraketSimulator.Z(), 0),
BraketSimulator.Instruction(BraketSimulator.H(), 0),
BraketSimulator.Instruction(BraketSimulator.Measure(), 0),
BraketSimulator.Instruction(BraketSimulator.Measure(), 1)]
end
@testset "Bare measure" begin
qasm = """
qubit[2] q;
measure q;
"""
circuit = BraketSimulator.Circuit(qasm)
@test circuit.instructions == [BraketSimulator.Instruction(BraketSimulator.Measure(), 0),
BraketSimulator.Instruction(BraketSimulator.Measure(), 1)]
@test [qubit_count(ix.operator) for ix in circuit.instructions] == [1, 1]
end
@testset "Measure with density matrix" begin
qasm = """
qubit[3] qs;
qubit q;
x qs[{0, 2}];
h q;
cphaseshift(1) qs, q;
phaseshift(-2) q;
measure qs;
measure q;
"""
circuit = BraketSimulator.Circuit(qasm)
simulation = BraketSimulator.DensityMatrixSimulator(4, 0)
BraketSimulator.evolve!(simulation, circuit.instructions)
@test BraketSimulator.probabilities(simulation) ≈ (1/2)*[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0]
end
@testset "GPhase" begin
qasm = """
qubit[2] qs;
int[8] two = 2;
gate x a { U(π, 0, π) a; }
gate cx c, a { ctrl @ x c, a; }
gate phase c, a {
gphase(π/2);
ctrl(two) @ gphase(π) c, a;
}
gate h a { U(π/2, 0, π) a; }
h qs[0];
cx qs[0], qs[1];
phase qs[0], qs[1];
gphase(π);
inv @ gphase(π / 2);
negctrl @ ctrl @ gphase(2 * π) qs[0], qs[1];
#pragma braket result amplitude '00', '01', '10', '11'
"""
circuit = BraketSimulator.Circuit(qasm)
simulation = BraketSimulator.StateVectorSimulator(2, 0)
BraketSimulator.evolve!(simulation, circuit.instructions)
sv = 1/√2 * [-1; 0; 0; 1]
@test simulation.state_vector ≈ sv
@test circuit.result_types == [BraketSimulator.Amplitude(["00", "01", "10", "11"])]
end
@testset "Numbers $qasm_str" for (qasm_str, var_name, output_val) in (("float[32] a = 1.24e-3;", "a", 1.24e-3),
("complex[float] b = 1-0.23im;", "b", 1-0.23im),
("const bit c = \"0\";", "c", falses(1)),
("bool d = false;", "d", false),
("complex[float] e = -0.23+2im;", "e", -0.23+2im),
("uint f = 0x123456789abcdef;", "f", 0x123456789abcdef),
("int g = 0o010;", "g", 0o010),
("float[64] h = 2*π;", "h", 2π),
("float[64] i = τ/2;", "i", Float64(π)),
)
qasm = """
$qasm_str
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs[var_name].val == output_val
end
@testset "Integers next to irrationals" begin
qasm = """
float[64] h = 2π;
"""
@test_throws Quasar.QasmParseError parse_qasm(qasm)
try
parse_qasm(qasm)
catch e
msg = sprint(showerror, e)
@test startswith(msg, "QasmParseError: expressions of form 2π are not supported -- you must separate the terms with a * operator.")
end
end
@testset "Bad classical type" begin
qasm = """
angle[64] h = 2π;
"""
@test_throws Quasar.QasmParseError parse_qasm(qasm)
end
@testset "Physical qubits" begin
qasm = """
h \$0;
cnot \$0, \$1;
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
circ = BraketSimulator.Circuit(visitor)
@test BraketSimulator.qubit_count(circ) == 2
@test circ.instructions == [BraketSimulator.Instruction(BraketSimulator.H(), 0), BraketSimulator.Instruction(BraketSimulator.CNot(), [0, 1])]
end
@testset "For loop and subroutines" begin
qasm_str = """
OPENQASM 3.0;
def bell(qubit q0, qubit q1) {
h q0;
cnot q0, q1;
}
def n_bells(int[32] n, qubit q0, qubit q1) {
for int i in [0:n - 1] {
h q0;
cnot q0, q1;
}
}
qubit[4] __qubits__;
bell(__qubits__[0], __qubits__[1]);
n_bells(5, __qubits__[2], __qubits__[3]);
bit[4] __bit_0__ = "0000";
__bit_0__[0] = measure __qubits__[0];
__bit_0__[1] = measure __qubits__[1];
__bit_0__[2] = measure __qubits__[2];
__bit_0__[3] = measure __qubits__[3];
"""
inputs = Dict("theta"=>0.2)
parsed_circ = BraketSimulator.Circuit(qasm_str, inputs)
deleteat!(parsed_circ.instructions, length(parsed_circ.instructions)-3:length(parsed_circ.instructions))
@test parsed_circ.instructions == [BraketSimulator.Instruction(BraketSimulator.H(), 0),
BraketSimulator.Instruction(BraketSimulator.CNot(), [0, 1]),
BraketSimulator.Instruction(BraketSimulator.H(), 2),
BraketSimulator.Instruction(BraketSimulator.CNot(), [2, 3]),
BraketSimulator.Instruction(BraketSimulator.H(), 2),
BraketSimulator.Instruction(BraketSimulator.CNot(), [2, 3]),
BraketSimulator.Instruction(BraketSimulator.H(), 2),
BraketSimulator.Instruction(BraketSimulator.CNot(), [2, 3]),
BraketSimulator.Instruction(BraketSimulator.H(), 2),
BraketSimulator.Instruction(BraketSimulator.CNot(), [2, 3]),
BraketSimulator.Instruction(BraketSimulator.H(), 2),
BraketSimulator.Instruction(BraketSimulator.CNot(), [2, 3])
]
end
@testset "For Loop" begin
qasm_with_scope = """
int[8] x = 0;
int[8] y = -100;
int[8] ten = 10;
for uint[8] i in [0:2:ten - 3] {
x += i;
}
for int[8] i in {2, 4, 6} {
y += i;
}
"""
qasm_no_scope = """
int[8] x = 0;
int[8] y = -100;
int[8] ten = 10;
for uint[8] i in [0:2:ten - 3] x += i;
for int[8] i in {2, 4, 6} y += i;
"""
@testset "$label" for (label, qasm) in (("With scoping {}", qasm_with_scope), ("Without scoping {}", qasm_no_scope))
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == sum((0, 2, 4, 6))
@test visitor.classical_defs["y"].val == sum((-100, 2, 4, 6))
end
end
@testset "While Loop" begin
qasm_with_scope = """
int[8] x = 0;
int[8] i = 0;
while (i < 7) {
x += i;
i += 1;
}
"""
qasm_no_scope = """
int[8] x = 0;
while (x < 7) x += 1;
"""
@testset "$label" for (label, qasm, val) in (("With scoping {}", qasm_with_scope, sum(0:6)), ("Without scoping {}", qasm_no_scope, 7))
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == val
end
end
@testset "Break and continue" begin
@testset for str in ("continue;", "{ continue; }")
qasm = """
int[8] x = 0;
for int[8] i in [0: 3] {
if (mod(i, 2) == 0) $str
x += i;
}
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == 4
qasm = """
int[8] x = 0;
int[8] i = 0;
while (i < 7) {
i += 1;
if (i == 5) $str
x += i;
}
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == sum(0:7) - 5
end
@testset for str in ("break;", "{ break; }")
qasm = """
int[8] x = 0;
for int[8] i in [0: 3] {
x += i;
if (mod(i, 2) == 1) $str
}
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == 1
qasm = """
int[8] x = 0;
int[8] i = 0;
while (i < 7) {
x += i;
i += 1;
if (i == 5) $str
}
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == sum(0:4)
end
@testset for str in ("continue", "break")
qasm = """
int[8] x = 0;
int[8] i = 0;
$str;
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
@test_throws Quasar.QasmVisitorError("$str statement encountered outside a loop.") visitor(parsed)
end
end
@testset "Builtin functions $fn" for (fn, type, arg, result) in (("arccos", "float[64]", 1, acos(1)),
("arcsin", "float[64]", 1, asin(1)),
("arctan", "float[64]", 1, atan(1)),
("ceiling", "int[64]", "π", 4),
("floor", "int[64]", "π", 3),
("mod", "int[64]", "4, 3", 1),
("mod", "float[64]", "5.2, 2.5", mod(5.2, 2.5)),
("cos", "float[64]", 1, cos(1)),
("sin", "float[64]", 1, sin(1)),
("tan", "float[64]", 1, tan(1)),
("sqrt", "float[64]", 2, sqrt(2)),
("exp", "float[64]", 2, exp(2)),
("log", "float[64]", "ℇ", log(ℯ)),
("popcount", "int[64]", "true", 1),
("popcount", "int[64]", "\"1001110\"", 4),
("popcount", "int[64]", "78", 4),
("popcount", "int[64]", "0x78", 4),
)
qasm = """
const $type $(fn)_result = $fn($arg);
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["$(fn)_result"].val == result
end
@testset "Builtin functions" begin
qasm = """
bit[2] bitvec = "11";
const int[64] popcount_bitvec_result = popcount(bitvec);
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["popcount_bitvec_result"].val == 2
@testset "Symbolic" begin
qasm = """
input float x;
input float y;
rx(x) \$0;
rx(arccos(x)) \$0;
rx(arcsin(x)) \$0;
rx(arctan(x)) \$0;
rx(ceiling(x)) \$0;
rx(cos(x)) \$0;
rx(exp(x)) \$0;
rx(floor(x)) \$0;
rx(log(x)) \$0;
rx(mod(x, y)) \$0;
rx(sin(x)) \$0;
rx(sqrt(x)) \$0;
rx(tan(x)) \$0;
"""
x = 1.0
y = 2.0
inputs = Dict("x"=>x, "y"=>y)
parsed_circ = BraketSimulator.Circuit(qasm, inputs)
ixs = [BraketSimulator.Instruction(BraketSimulator.Rx(x), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(acos(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(asin(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(atan(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(ceil(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(cos(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(exp(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(floor(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(log(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(mod(x, y)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(sin(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(sqrt(x)), 0),
BraketSimulator.Instruction(BraketSimulator.Rx(tan(x)), 0)]
c = BraketSimulator.Circuit()
for ix in ixs
BraketSimulator.add_instruction!(c, ix)
end
@test parsed_circ.instructions == c.instructions
end
@testset "popcount!" begin
@test Quasar.popcount() == 0
@test Quasar.popcount(vcat(trues(3), falses(2))) == 3
@test Quasar.popcount("01010101") == 4
end
end
@testset "Bad pragma" begin
qasm = """
qubit[4] q;
#pragma braket fake_pragma
"""
@test_throws Quasar.QasmParseError parse_qasm(qasm)
end
@testset "Barrier" begin
qasm = """
qubit[4] q;
x q[0];
barrier q[0];
"""
@test_warn "barrier expression encountered -- currently `barrier` is a no-op" parse_qasm(qasm)
end
@testset "Stretch" begin
qasm = """
stretch a;
"""
@test_warn "stretch expression encountered -- currently `stretch` is a no-op" parse_qasm(qasm)
end
@testset "Duration" begin
qasm = """
duration a = 10μs;
"""
@test_warn "duration expression encountered -- currently `duration` is a no-op" parse_qasm(qasm)
end
@testset "Reset" begin
qasm = """
qubit[4] q;
x q[0];
reset q[0];
"""
@test_warn "reset expression encountered -- currently `reset` is a no-op" parse_qasm(qasm)
end
@testset "Gate call missing/extra args" begin
qasm = """
qubit[4] q;
rx q[0];
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
@test_throws Quasar.QasmVisitorError("gate rx requires arguments but none were provided.") visitor(parsed)
qasm = """
qubit[4] q;
x(0.1) q[0];
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
@test_throws Quasar.QasmVisitorError("gate x does not accept arguments but arguments were provided.") visitor(parsed)
end
@testset "Adjoint Gradient pragma" begin
qasm = """
input float theta;
qubit[4] q;
rx(theta) q[0];
#pragma braket result adjoint_gradient expectation(-6 * y(q[0]) @ i(q[1]) + 0.75 * y(q[2]) @ z(q[3])) theta
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor(Dict("theta"=>0.1))
@test_throws Quasar.QasmVisitorError("Result type adjoint_gradient is not supported.", "TypeError") visitor(parsed)
#= circuit = BraketSimulator.Circuit(qasm, Dict("theta"=>0.1))
θ = FreeParameter("theta")
obs = -2 * BraketSimulator.Observables.Y() * (3 * BraketSimulator.Observables.I()) + 0.75 * BraketSimulator.Observables.Y() * BraketSimulator.Observables.Z()
@test circuit.result_types[1].observable == obs
@test circuit.result_types[1].targets == [QubitSet([0, 1]), QubitSet([2, 3])]
@test circuit.result_types[1].parameters == ["theta"]=#
end
@testset "Assignment operators" begin
@testset "Op: $op" for (op, initial, arg, final) in (("+", 0, 1, 1), ("*", 1, 2, 2), ("/", 2, 2, 1), ("-", 1, 5, -4))
qasm = """
int[16] x;
x = $initial;
x $op= $arg;
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == final
end
@testset "Op: $op" for (op, initial, arg, final) in (("|", "0000", "11", BitVector([0,0,1,1])),
("&", "0010", "11", BitVector([0,0,1,0])),
("^", "0001", "10", BitVector([0,0,1,1])),
)
qasm = """
bit[4] xs = \"$initial\";
xs[2:] $op= \"$arg\";
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["xs"].val == final
end
end
@testset "Binary bit operators $op" for (op, result) in (("&", BitVector([0,1,0,0])),
("|", BitVector([1,1,0,1])),
("^", BitVector([1,0,0,1])),
(">", false),
("<", true),
(">=", false),
("<=", true),
("==", false),
("!=", true),
)
qasm = """
bit[4] x = "0101";
bit[4] y = "1100";
bit[4] result = x $op y;
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == BitVector([0,1,0,1])
@test visitor.classical_defs["y"].val == BitVector([1,1,0,0])
@test visitor.classical_defs["result"].val == result
end
@testset "Binary bit operators $op" for (op, arg1, arg2, result) in (("<<", "x", 2, BitVector([0,1,0,0])),
(">>", "y", 2, BitVector([0,0,1,1])),
)
qasm = """
bit[4] x = "0101";
bit[4] y = "1100";
bit[4] result = $arg1 $op $arg2;
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["result"].val == result
end
@testset "Unary bit operators $op" for (op, typ, arg, result) in (("~", "bit[4]", "x", BitVector([1,0,1,0])),
("!", "bit", "x", false),
("!", "bit", "x << 4", true)
)
qasm = """
bit not;
bit not_zero;
bit[4] x = "0101";
$typ result = $(op)$(arg);
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
@test visitor.classical_defs["x"].val == BitVector([0,1,0,1])
@test visitor.classical_defs["result"].val == result
end
@testset "End statement" begin
qasm = """
z \$0;
x \$1;
h \$2;
y \$3;
end;
y \$2;
h \$3;
"""
circ = BraketSimulator.Circuit(qasm)
@test circ.instructions == [BraketSimulator.Instruction(BraketSimulator.Z(), 0),
BraketSimulator.Instruction(BraketSimulator.X(), 1),
BraketSimulator.Instruction(BraketSimulator.H(), 2),
BraketSimulator.Instruction(BraketSimulator.Y(), 3)]
end
@testset "Switch/case" begin
qasm = """
input int[8] x;
switch (x + 1) {
case 0b00 {}
default { z \$0; }
}
"""
circ = BraketSimulator.Circuit(qasm, Dict("x"=> -1))
@test isempty(circ.instructions)
circ = BraketSimulator.Circuit(qasm, Dict("x"=> 0))
@test circ.instructions == [BraketSimulator.Instruction(BraketSimulator.Z(), 0)]
qasm = """
input int[8] x;
switch (x) { case 0 {} case 1, 2 { z \$0; } }
"""
circ = BraketSimulator.Circuit(qasm, Dict("x"=> 0))
@test isempty(circ.instructions)
circ = BraketSimulator.Circuit(qasm, Dict("x"=> 1))
@test circ.instructions == [BraketSimulator.Instruction(BraketSimulator.Z(), 0)]
circ = BraketSimulator.Circuit(qasm, Dict("x"=> 2))
@test circ.instructions == [BraketSimulator.Instruction(BraketSimulator.Z(), 0)]
qasm = """
input int[8] x;
switch (x) { case 0 {} default { z \$0; } default { x \$0; } }
"""
@test_throws Quasar.QasmParseError BraketSimulator.Circuit(qasm, Dict("x"=>0))
qasm = """
input int[8] x;
switch (x) { default { z \$0; } case 0 {} }
"""
@test_throws Quasar.QasmParseError BraketSimulator.Circuit(qasm, Dict("x"=>0))
qasm = """
input int[8] x;
switch (x) { case 0 { z \$0; } true {} }
"""
@test_throws Quasar.QasmParseError BraketSimulator.Circuit(qasm, Dict("x"=>0))
end
@testset "If/Else" begin
qasm = """
int[8] two = 2;
bit[3] m = "000";
if (two + 1) {
m[0] = 1;
} else {
m[1] = 1;
}
if (!bool(two - 2)) {
m[2] = 1;
}
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
bit_vec = BitVector([1,0,1])
@test visitor.classical_defs["m"].val == bit_vec
qasm = """
int[8] two = -2;
bit[3] m = "000";
if (two + 1) {
m[0] = 1;
} else {
m[1] = 1;
}
if (!bool(two - 2)) {
m[2] = 1;
}
"""
parsed = parse_qasm(qasm)
visitor = QasmProgramVisitor()
visitor(parsed)
bit_vec = BitVector([0,1,1])
@test visitor.classical_defs["m"].val == bit_vec
qasm = """
input bool which_gate;
qubit q;
if (which_gate) {
x q;
} else {
y q;
}
"""
for (flag, which_gate) in ((true, BraketSimulator.X()), (false, BraketSimulator.Y()))
circuit = BraketSimulator.Circuit(qasm, Dict("which_gate"=>flag))
@test circuit.instructions == [BraketSimulator.Instruction(which_gate, 0)]
end
end
@testset "Global gate control" begin
qasm = """
qubit q1;
qubit q2;
h q1;
h q2;
ctrl @ s q1, q2;
"""
circuit = BraketSimulator.Circuit(qasm)
simulation = BraketSimulator.StateVectorSimulator(2, 0)
BraketSimulator.evolve!(simulation, circuit.instructions)
@test simulation.state_vector ≈ [0.5, 0.5, 0.5, 0.5im]
end
@testset "Simple Pow" for (orig_gate, sqrt_gate, sqrt_ix) in (("z", "s", BraketSimulator.S()),
("x", "v", BraketSimulator.V()),
)
custom_qasm = """
qubit q1;
qubit q2;
h q1;
h q2;
pow(1/2) @ $orig_gate q1;
"""
standard_qasm = """
qubit q1;
qubit q2;
h q1;
h q2;
$sqrt_gate q1;
"""
canonical_ixs = [BraketSimulator.Instruction(BraketSimulator.H(), 0),
BraketSimulator.Instruction(BraketSimulator.H(), 1),
BraketSimulator.Instruction(sqrt_ix, 0)]
canonical_simulation = BraketSimulator.StateVectorSimulator(2, 0)
BraketSimulator.evolve!(canonical_simulation, canonical_ixs)
@testset "$title" for (title, qasm) in (("standard", standard_qasm), ("custom", custom_qasm))
circuit = BraketSimulator.Circuit(qasm)
simulation = BraketSimulator.StateVectorSimulator(2, 0)
BraketSimulator.evolve!(simulation, circuit.instructions)
@test simulation.state_vector ≈ canonical_simulation.state_vector
end
end
@testset "Complex Pow" begin
custom_qasm = """
int[8] two = 2;
gate x a { U(π, 0, π) a; }
gate cx c, a {
pow(1) @ ctrl @ x c, a;
}
gate cxx_1 c, a {
pow(two) @ cx c, a;
}
gate cxx_2 c, a {
pow(1/2) @ pow(4) @ cx c, a;
}
gate cxxx c, a {
pow(1) @ pow(two) @ cx c, a;
}
qubit q1;
qubit q2;
qubit q3;
qubit q4;
qubit q5;
pow(1/2) @ x q1; // half flip
pow(1/2) @ x q1; // half flip
cx q1, q2; // flip
cxx_1 q1, q3; // don't flip
cxx_2 q1, q4; // don't flip
cnot q1, q5; // flip
x q3; // flip
x q4; // flip
s q1; // sqrt z
s q1; // again
inv @ z q1; // inv z
"""
standard_qasm = """
int[8] two = 2;
gate cxx_1 c, a {
pow(two) @ cnot c, a;
}
gate cxx_2 c, a {
pow(1/2) @ pow(4) @ cnot c, a;
}
gate cxxx c, a {
pow(1) @ pow(two) @ cnot c, a;
}
qubit q1;
qubit q2;
qubit q3;
qubit q4;
qubit q5;
pow(1/2) @ x q1; // half flip
pow(1/2) @ x q1; // half flip
cnot q1, q2; // flip
cxx_1 q1, q3; // don't flip
cxx_2 q1, q4; // don't flip
cnot q1, q5; // flip
x q3; // flip
x q4; // flip
s q1; // sqrt z
s q1; // again
inv @ z q1; // inv z
"""
@testset "$title" for (title, qasm) in (("standard", standard_qasm),
("custom", custom_qasm)
)
circuit = BraketSimulator.Circuit(qasm)
simulation = BraketSimulator.StateVectorSimulator(5, 0)
BraketSimulator.evolve!(simulation, circuit.instructions)
sv = zeros(32)
sv[end] = 1.0
@test simulation.state_vector ≈ sv
end
end
@testset "Gate control" begin
qasm = """
int[8] two = 2;
gate x a { U(π, 0, π) a; }
gate cx c, a {
ctrl @ x c, a;
}
gate ccx_1 c1, c2, a {
ctrl @ ctrl @ x c1, c2, a;
}
gate ccx_2 c1, c2, a {
ctrl(two) @ x c1, c2, a;
}
gate ccx_3 c1, c2, a {
ctrl @ cx c1, c2, a;
}
qubit q1;
qubit q2;
qubit q3;
qubit q4;
qubit q5;
// doesn't flip q2
cx q1, q2;
// flip q1
x q1;
// flip q2
cx q1, q2;
// doesn't flip q3, q4, q5
ccx_1 q1, q4, q3;
ccx_2 q1, q3, q4;
ccx_3 q1, q3, q5;
// flip q3, q4, q5;
ccx_1 q1, q2, q3;
ccx_2 q1, q2, q4;
ccx_2 q1, q2, q5;
"""
circuit = BraketSimulator.Circuit(qasm)
simulation = BraketSimulator.StateVectorSimulator(5, 0)
sv = zeros(ComplexF64, 32)
sv[end] = 1.0
canonical_ixs = [
BraketSimulator.Instruction(BraketSimulator.CNot(), [0, 1]),
BraketSimulator.Instruction(BraketSimulator.X(), 0),
BraketSimulator.Instruction(BraketSimulator.CNot(), [0, 1]),
BraketSimulator.Instruction(BraketSimulator.CCNot(), [0, 3, 2]),
BraketSimulator.Instruction(BraketSimulator.CCNot(), [0, 2, 3]),
BraketSimulator.Instruction(BraketSimulator.CCNot(), [0, 2, 4]),
BraketSimulator.Instruction(BraketSimulator.CCNot(), [0, 1, 2]),
BraketSimulator.Instruction(BraketSimulator.CCNot(), [0, 1, 3]),
BraketSimulator.Instruction(BraketSimulator.CCNot(), [0, 1, 4])
]
canonical_simulation = BraketSimulator.StateVectorSimulator(5, 0)
ii = 1
@testset for (ix, c_ix) in zip(circuit.instructions, canonical_ixs)
BraketSimulator.evolve!(simulation, [ix])
BraketSimulator.evolve!(canonical_simulation, [c_ix])
for jj in 1:32
@test simulation.state_vector[jj] ≈ canonical_simulation.state_vector[jj] atol=1e-10
end
@test simulation.state_vector ≈ canonical_simulation.state_vector atol=1e-10
ii += 1
end
@test canonical_simulation.state_vector ≈ sv rtol=1e-10
@test simulation.state_vector ≈ sv rtol=1e-10
qasm = """