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diff --git a/test/arch/mep/ir/test_logical.py b/test/arch/mep/ir/test_logical.py
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+++ b/test/arch/mep/ir/test_logical.py
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+# Toshiba MeP-c4 - Logical instructions unit tests
+# Guillaume Valadon <guillaume@valadon.net>
+
+from ut_helpers_ir import exec_instruction
+
+from miasm2.expression.expression import ExprId, ExprInt, ExprCond, ExprOp
+
+
+class TestLogical:
+
+    def test_or(self):
+        """Test OR execution"""
+
+        # OR Rn, Rm
+        exec_instruction("OR R1, R2",
+                         [(ExprId("R1", 32), ExprInt(1, 32)), (ExprId("R2", 32), ExprInt(1, 32))],
+                         [(ExprId("R1", 32), ExprInt(1, 32))])
+
+    def test_or3(self):
+        """Test OR3 execution"""
+
+        # OR3 Rn,Rm,imm16
+        exec_instruction("OR3 R1, R2, 1",
+                         [(ExprId("R2", 32), ExprInt(1, 32))],
+                         [(ExprId("R1", 32), ExprInt(1, 32))])
+
+    def test_and(self):
+        """Test AND  execution"""
+
+        # AND Rn, Rm
+        exec_instruction("AND R1, R2",
+                         [(ExprId("R1", 32), ExprInt(1, 32)), (ExprId("R2", 32), ExprInt(0, 32))],
+                         [(ExprId("R1", 32), ExprInt(0, 32))])
+
+    def test_and3(self):
+        """Test AND3 execution"""
+
+        # AND3 Rn,Rm,imm16
+        exec_instruction("AND3 R1, R2, 0",
+                         [(ExprId("R2", 32), ExprInt(1, 32))],
+                         [(ExprId("R1", 32), ExprInt(0, 32))])
+
+    def test_xor(self):
+        """Test XOR execution"""
+
+        # XOR Rn, Rm
+        exec_instruction("XOR R1, R2",
+                         [(ExprId("R1", 32), ExprInt(1, 32)), (ExprId("R2", 32), ExprInt(0, 32))],
+                         [(ExprId("R1", 32), ExprInt(1, 32))])
+
+    def test_xor3(self):
+        """Test XOR3 execution"""
+
+        # XOR3 Rn,Rm,imm16
+        exec_instruction("XOR3 R1, R2, 1",
+                         [(ExprId("R2", 32), ExprInt(0, 32))],
+                         [(ExprId("R1", 32), ExprInt(1, 32))])
+
+    def test_nor(self):
+        """Test NOR execution"""
+
+        # NOR Rn, Rm
+        exec_instruction("NOR R1, R2",
+                         [(ExprId("R1", 32), ExprInt(1, 32)), (ExprId("R2", 32), ExprInt(0, 32))],
+                         [(ExprId("R1", 32), ExprInt(0xFFFFFFFE, 32))])