diff --git a/core/src/main/java/org/teavm/backend/wasm/intrinsics/IntegerIntrinsic.java b/core/src/main/java/org/teavm/backend/wasm/intrinsics/IntegerIntrinsic.java
index 38cb6fd79..34b41b53b 100644
--- a/core/src/main/java/org/teavm/backend/wasm/intrinsics/IntegerIntrinsic.java
+++ b/core/src/main/java/org/teavm/backend/wasm/intrinsics/IntegerIntrinsic.java
@@ -22,6 +22,8 @@ import org.teavm.backend.wasm.model.expression.WasmExpression;
 import org.teavm.backend.wasm.model.expression.WasmIntBinary;
 import org.teavm.backend.wasm.model.expression.WasmIntBinaryOperation;
 import org.teavm.backend.wasm.model.expression.WasmIntType;
+import org.teavm.backend.wasm.model.expression.WasmIntUnary;
+import org.teavm.backend.wasm.model.expression.WasmIntUnaryOperation;
 import org.teavm.model.MethodReference;
 
 public class IntegerIntrinsic implements WasmIntrinsic {
@@ -38,6 +40,9 @@ public class IntegerIntrinsic implements WasmIntrinsic {
             case "divideUnsigned":
             case "remainderUnsigned":
             case "compareUnsigned":
+            case "numberOfLeadingZeros":
+            case "numberOfTrailingZeros":
+            case "bitCount":
                 return true;
             default:
                 return false;
@@ -59,6 +64,15 @@ public class IntegerIntrinsic implements WasmIntrinsic {
                 return new WasmCall(manager.getFunctions().forStaticMethod(COMPARE_UNSIGNED),
                         manager.generate(invocation.getArguments().get(0)),
                         manager.generate(invocation.getArguments().get(1)));
+            case "numberOfLeadingZeros":
+                return new WasmIntUnary(WasmIntType.INT32, WasmIntUnaryOperation.CLZ,
+                        manager.generate(invocation.getArguments().get(0)));
+            case "numberOfTrailingZeros":
+                return new WasmIntUnary(WasmIntType.INT32, WasmIntUnaryOperation.CTZ,
+                        manager.generate(invocation.getArguments().get(0)));
+            case "bitCount":
+                return new WasmIntUnary(WasmIntType.INT32, WasmIntUnaryOperation.POPCNT,
+                        manager.generate(invocation.getArguments().get(0)));
             default:
                 throw new AssertionError();
         }
diff --git a/core/src/main/java/org/teavm/backend/wasm/intrinsics/LongIntrinsic.java b/core/src/main/java/org/teavm/backend/wasm/intrinsics/LongIntrinsic.java
index 9b0f22f11..43ad044aa 100644
--- a/core/src/main/java/org/teavm/backend/wasm/intrinsics/LongIntrinsic.java
+++ b/core/src/main/java/org/teavm/backend/wasm/intrinsics/LongIntrinsic.java
@@ -22,6 +22,8 @@ import org.teavm.backend.wasm.model.expression.WasmExpression;
 import org.teavm.backend.wasm.model.expression.WasmIntBinary;
 import org.teavm.backend.wasm.model.expression.WasmIntBinaryOperation;
 import org.teavm.backend.wasm.model.expression.WasmIntType;
+import org.teavm.backend.wasm.model.expression.WasmIntUnary;
+import org.teavm.backend.wasm.model.expression.WasmIntUnaryOperation;
 import org.teavm.model.MethodReference;
 
 public class LongIntrinsic implements WasmIntrinsic {
@@ -38,6 +40,9 @@ public class LongIntrinsic implements WasmIntrinsic {
             case "divideUnsigned":
             case "remainderUnsigned":
             case "compareUnsigned":
+            case "numberOfLeadingZeros":
+            case "numberOfTrailingZeros":
+            case "bitCount":
                 return true;
             default:
                 return false;
@@ -59,6 +64,15 @@ public class LongIntrinsic implements WasmIntrinsic {
                 return new WasmCall(manager.getFunctions().forStaticMethod(COMPARE_UNSIGNED),
                         manager.generate(invocation.getArguments().get(0)),
                         manager.generate(invocation.getArguments().get(1)));
+            case "numberOfLeadingZeros":
+                return new WasmIntUnary(WasmIntType.INT64, WasmIntUnaryOperation.CLZ,
+                        manager.generate(invocation.getArguments().get(0)));
+            case "numberOfTrailingZeros":
+                return new WasmIntUnary(WasmIntType.INT64, WasmIntUnaryOperation.CTZ,
+                        manager.generate(invocation.getArguments().get(0)));
+            case "bitCount":
+                return new WasmIntUnary(WasmIntType.INT64, WasmIntUnaryOperation.POPCNT,
+                        manager.generate(invocation.getArguments().get(0)));
             default:
                 throw new AssertionError();
         }
diff --git a/core/src/main/java/org/teavm/backend/wasm/intrinsics/gc/IntNumIntrinsic.java b/core/src/main/java/org/teavm/backend/wasm/intrinsics/gc/IntNumIntrinsic.java
index eaed36989..db95b6189 100644
--- a/core/src/main/java/org/teavm/backend/wasm/intrinsics/gc/IntNumIntrinsic.java
+++ b/core/src/main/java/org/teavm/backend/wasm/intrinsics/gc/IntNumIntrinsic.java
@@ -22,6 +22,8 @@ import org.teavm.backend.wasm.model.expression.WasmExpression;
 import org.teavm.backend.wasm.model.expression.WasmIntBinary;
 import org.teavm.backend.wasm.model.expression.WasmIntBinaryOperation;
 import org.teavm.backend.wasm.model.expression.WasmIntType;
+import org.teavm.backend.wasm.model.expression.WasmIntUnary;
+import org.teavm.backend.wasm.model.expression.WasmIntUnaryOperation;
 import org.teavm.model.MethodReference;
 
 public class IntNumIntrinsic implements WasmGCIntrinsic {
@@ -48,6 +50,15 @@ public class IntNumIntrinsic implements WasmGCIntrinsic {
                 return new WasmCall(context.functions().forStaticMethod(compareUnsigned),
                         context.generate(invocation.getArguments().get(0)),
                         context.generate(invocation.getArguments().get(1)));
+            case "numberOfLeadingZeros":
+                return new WasmIntUnary(wasmType, WasmIntUnaryOperation.CLZ,
+                        context.generate(invocation.getArguments().get(0)));
+            case "numberOfTrailingZeros":
+                return new WasmIntUnary(wasmType, WasmIntUnaryOperation.CTZ,
+                        context.generate(invocation.getArguments().get(0)));
+            case "bitCount":
+                return new WasmIntUnary(wasmType, WasmIntUnaryOperation.POPCNT,
+                        context.generate(invocation.getArguments().get(0)));
             default:
                 throw new AssertionError();
         }
diff --git a/core/src/main/java/org/teavm/backend/wasm/intrinsics/gc/WasmGCIntrinsics.java b/core/src/main/java/org/teavm/backend/wasm/intrinsics/gc/WasmGCIntrinsics.java
index 00919cf13..08296f55d 100644
--- a/core/src/main/java/org/teavm/backend/wasm/intrinsics/gc/WasmGCIntrinsics.java
+++ b/core/src/main/java/org/teavm/backend/wasm/intrinsics/gc/WasmGCIntrinsics.java
@@ -126,6 +126,9 @@ public class WasmGCIntrinsics implements WasmGCIntrinsicProvider {
         add(new MethodReference(wrapperClass, "divideUnsigned", javaClass, javaClass, javaClass), intrinsic);
         add(new MethodReference(wrapperClass, "remainderUnsigned", javaClass, javaClass, javaClass), intrinsic);
         add(new MethodReference(wrapperClass, "compareUnsigned", javaClass, javaClass, int.class), intrinsic);
+        add(new MethodReference(wrapperClass, "numberOfLeadingZeros", javaClass, int.class), intrinsic);
+        add(new MethodReference(wrapperClass, "numberOfTrailingZeros", javaClass, int.class), intrinsic);
+        add(new MethodReference(wrapperClass, "bitCount", javaClass, int.class), intrinsic);
     }
 
     private void fillFloat() {