hdl.ast: add Value.{any,all}, mapping to $reduce_{or,and}.

Refs #147.

nmigen/test/test_hdl_ast.py

@@ -251,6 +251,14 @@ class OperatorTestCase(FHDLTestCase):
         self.assertEqual(repr(v), "(b (const 1'd0))")
         self.assertEqual(v.shape(), (1, False))
 
+    def test_any(self):
+        v = Const(0b101).any()
+        self.assertEqual(repr(v), "(r| (const 3'd5))")
+
+    def test_all(self):
+        v = Const(0b101).all()
+        self.assertEqual(repr(v), "(r& (const 3'd5))")
+
     def test_hash(self):
         with self.assertRaises(TypeError):
             hash(Const(0) + Const(0))

nmigen/test/test_sim.py

@@ -57,6 +57,18 @@ class SimulatorUnitTestCase(FHDLTestCase):
         self.assertStatement(stmt, [C(1, 4)], C(1))
         self.assertStatement(stmt, [C(2, 4)], C(1))
 
+    def test_any(self):
+        stmt = lambda y, a: y.eq(a.any())
+        self.assertStatement(stmt, [C(0b00, 2)], C(0))
+        self.assertStatement(stmt, [C(0b01, 2)], C(1))
+        self.assertStatement(stmt, [C(0b11, 2)], C(1))
+
+    def test_all(self):
+        stmt = lambda y, a: y.eq(a.all())
+        self.assertStatement(stmt, [C(0b00, 2)], C(0))
+        self.assertStatement(stmt, [C(0b01, 2)], C(0))
+        self.assertStatement(stmt, [C(0b11, 2)], C(1))
+
     def test_add(self):
         stmt = lambda y, a, b: y.eq(a + b)
         self.assertStatement(stmt, [C(0,  4), C(1,  4)], C(1,   4))