Implemented more move instructions on arm64

src/arm/Move_test.go

@@ -33,15 +33,36 @@ func TestMoveRegisterNumber(t *testing.T) {
 		Number   int
 		Code     uint32
 	}{
+		// MOVZ
 		{arm.X0, 0, 0xD2800000},
 		{arm.X0, 1, 0xD2800020},
+
+		// MOV (bitmask immediate)
+		{arm.X0, 0x1FFFF, 0xB24043E0},
+		{arm.X0, 0x7FFFFFFF, 0xB2407BE0},
+		{arm.X0, 0xFFFFFFFF, 0xB2407FE0},
+
+		// MOV (inverted wide immediate)
 		{arm.X0, -1, 0x92800000},
+		{arm.X0, 0x7FFFFFFFFFFFFFFF, 0x92F00000},
+		{arm.X0, 0x2FFFFFFFF, 0x92DFFFA0}, // not encodable in the GNU assembler
+		{arm.X0, 0x2FFFF, 0x92BFFFA0},     // not encodable in the GNU assembler
+
+		// Not encodable
+		{arm.X0, 0xCAFEBABE, 0},
+		{arm.X0, 0xDEADC0DE, 0},
 	}
 
 	for _, pattern := range usagePatterns {
 		t.Logf("mov %s, %d", pattern.Register, pattern.Number)
-		code := arm.MoveRegisterNumber(pattern.Register, pattern.Number)
-		assert.DeepEqual(t, code, pattern.Code)
+		code, encodable := arm.MoveRegisterNumber(pattern.Register, pattern.Number)
+
+		if pattern.Code != 0 {
+			assert.True(t, encodable)
+			assert.DeepEqual(t, code, pattern.Code)
+		} else {
+			assert.False(t, encodable)
+		}
 	}
 }