From ee14ad272e68d9363202d7f668e0b20302827209 Mon Sep 17 00:00:00 2001
From: hachem <im@hachem.wtf>
Date: Mon, 14 Sep 2026 12:20:52 +0200
Subject: feat: simd + testing + formatting

---
 tester/clifford.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 tester/clifford.c

(limited to 'tester/clifford.c')

diff --git a/tester/clifford.c b/tester/clifford.c
new file mode 100644
index 0000000..3be9234
--- /dev/null
+++ b/tester/clifford.c
@@ -0,0 +1,75 @@
+#include "tests.h"
+
+static const double R2 = 0.7071067811865476;
+
+static void build_bell(struct PsiQuantumCircuit* c)
+{
+	psi_apply_h(c, 0);
+	psi_apply_cnot(c, 0, 1);
+}
+
+static void build_ghz(struct PsiQuantumCircuit* c)
+{
+	psi_apply_h(c, 0);
+	psi_apply_cnot(c, 0, 1);
+	psi_apply_cnot(c, 0, 2);
+}
+
+void run_clifford_tests(void)
+{
+	psi_test_section("Clifford gates");
+
+	struct PsiQuantumCircuit x = psi_new_quantum_circuit(1);
+	psi_apply_x(&x, 0);
+	struct PsiComplex x_exp[] = { psi_new_complex(0.0, 0.0), psi_new_complex(1.0, 0.0) };
+	psi_check_circuit("X|0> = |1>", &x, x_exp, 2);
+	psi_free_quantum_circuit(&x);
+
+	struct PsiQuantumCircuit bell = psi_new_quantum_circuit(2);
+	build_bell(&bell);
+	struct PsiComplex bell_exp[] = {
+		psi_new_complex(R2, 0.0),
+		psi_new_complex(0.0, 0.0),
+		psi_new_complex(0.0, 0.0),
+		psi_new_complex(R2, 0.0),
+	};
+	psi_check_circuit("Bell = (|00>+|11>)/sqrt2", &bell, bell_exp, 4);
+	psi_free_quantum_circuit(&bell);
+
+	struct PsiQuantumCircuit ghz = psi_new_quantum_circuit(3);
+	build_ghz(&ghz);
+	struct PsiComplex ghz_exp[] = {
+		psi_new_complex(R2, 0.0),  psi_new_complex(0.0, 0.0), psi_new_complex(0.0, 0.0),
+		psi_new_complex(0.0, 0.0), psi_new_complex(0.0, 0.0), psi_new_complex(0.0, 0.0),
+		psi_new_complex(0.0, 0.0), psi_new_complex(R2, 0.0),
+	};
+	psi_check_circuit("GHZ = (|000>+|111>)/sqrt2", &ghz, ghz_exp, 8);
+	psi_free_quantum_circuit(&ghz);
+
+	struct PsiQuantumCircuit swap = psi_new_quantum_circuit(2);
+	psi_apply_x(&swap, 0);
+	psi_apply_cnot(&swap, 0, 1);
+	psi_apply_cnot(&swap, 1, 0);
+	psi_apply_cnot(&swap, 0, 1);
+	struct PsiComplex swap_exp[] = {
+		psi_new_complex(0.0, 0.0),
+		psi_new_complex(1.0, 0.0),
+		psi_new_complex(0.0, 0.0),
+		psi_new_complex(0.0, 0.0),
+	};
+	psi_check_circuit("SWAP via 3 CNOTs: |10> -> |01>", &swap, swap_exp, 4);
+	psi_free_quantum_circuit(&swap);
+
+	struct PsiQuantumCircuit toffoli = psi_new_quantum_circuit(3);
+	psi_apply_x(&toffoli, 0);
+	psi_apply_x(&toffoli, 1);
+	psi_apply_ccnot(&toffoli, 0, 1, 2);
+	struct PsiComplex toffoli_exp[8];
+	for (size_t i = 0; i < 8; i++)
+		toffoli_exp[i] = psi_new_complex(0.0, 0.0);
+	toffoli_exp[7] = psi_new_complex(1.0, 0.0);
+	psi_check_circuit("Toffoli: |110> -> |111>", &toffoli, toffoli_exp, 8);
+	psi_free_quantum_circuit(&toffoli);
+
+	psi_check_runtimes_agree("Runtimes agree on GHZ", 3, build_ghz);
+}
-- 
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