Clean up clone3 return value

src/ClonesWithImmutableArgs.sol

@@ -419,7 +419,7 @@ library ClonesWithImmutableArgs {
                 // Nonce of the proxy contract (1).
                 mstore8(0x34, 0x01)
 
-                deployed := keccak256(0x1e, 0x17)
+                deployed := and(keccak256(0x1e, 0x17), 0xffffffffffffffffffffffffffffffffffffffff)
 
                 // If the `call` fails or the code size of `deployed` is zero, revert.
                 // The second argument of the or() call is evaluated first, which is important
@@ -480,7 +480,7 @@ library ClonesWithImmutableArgs {
             // Nonce of the proxy contract (1).
             mstore8(0x34, 0x01)
 
-            deployed := keccak256(0x1e, 0x17)
+            deployed := and(keccak256(0x1e, 0x17), 0xffffffffffffffffffffffffffffffffffffffff)
         }
     }
 }

src/test/ClonesWithImmutableArgs.t.sol

@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: BSD
+pragma solidity ^0.8.4;
+
+import {DSTest} from "ds-test/test.sol";
+
+import {ClonesWithImmutableArgs} from "../ClonesWithImmutableArgs.sol";
+import {ExampleClone} from "../ExampleClone.sol";
+
+contract ClonesWithImmutableArgsTest is DSTest {
+    /// -----------------------------------------------------------------------
+    /// Correctness tests
+    /// -----------------------------------------------------------------------
+    function testCorrectness_addressOfClone3CleanAddress(bytes32 salt) public {
+        uint256 remainderMask = ~(uint256(type(uint160).max));
+        address predicted = ClonesWithImmutableArgs.addressOfClone3(salt);
+
+        uint256 remainder;
+        assembly ("memory-safe") {
+            remainder := and(predicted, remainderMask)
+        }
+        assertEq(remainder, 0);
+    }
+
+    function testCorrectness_clone3CleanAddress(
+        address param1,
+        uint256 param2,
+        uint64 param3,
+        uint8 param4,
+        bytes32 salt
+    ) public {
+        address implementation = address(new ExampleClone());
+        uint256 remainderMask = ~(uint256(type(uint160).max));
+        bytes memory data = abi.encodePacked(param1, param2, param3, param4);
+        address clone = ClonesWithImmutableArgs.clone3(implementation, data, salt, 0);
+
+        uint256 remainder;
+        assembly ("memory-safe") {
+            remainder := and(clone, remainderMask)
+        }
+        assertEq(remainder, 0);
+    }
+}