diff --git a/runtime/src/main/kotlin/konan/internal/Boxing.kt b/runtime/src/main/kotlin/konan/internal/Boxing.kt
index 59534ea2fc6..7dc4f6fbdc3 100644
--- a/runtime/src/main/kotlin/konan/internal/Boxing.kt
+++ b/runtime/src/main/kotlin/konan/internal/Boxing.kt
@@ -20,6 +20,76 @@ class BooleanBox(val value: Boolean) : Comparable<Boolean> {
 
 fun boxBoolean(value: Boolean) = BooleanBox(value)
 
+class CharBox(val value: Char) : Comparable<Char> {
+    override fun equals(other: Any?): Boolean {
+        if (other !is CharBox) {
+            return false
+        }
+
+        return this.value == other.value
+    }
+
+    override fun hashCode() = value.hashCode()
+
+    override fun toString() = value.toString()
+
+    override fun compareTo(other: Char): Int = value.compareTo(other)
+}
+
+fun boxChar(value: Char) = CharBox(value)
+
+class ByteBox(val value: Byte) : Number(), Comparable<Byte> {
+    override fun equals(other: Any?): Boolean {
+        if (other !is ByteBox) {
+            return false
+        }
+
+        return this.value == other.value
+    }
+
+    override fun hashCode() = value.hashCode()
+
+    override fun toString() = value.toString()
+
+    override fun compareTo(other: Byte): Int = value.compareTo(other)
+
+    override fun toByte() = value.toByte()
+    override fun toChar() = value.toChar()
+    override fun toShort() = value.toShort()
+    override fun toInt() = value.toInt()
+    override fun toLong() = value.toLong()
+    override fun toFloat() = value.toFloat()
+    override fun toDouble() = value.toDouble()
+}
+
+fun boxByte(value: Byte) = ByteBox(value)
+
+class ShortBox(val value: Short) : Number(), Comparable<Short> {
+    override fun equals(other: Any?): Boolean {
+        if (other !is ShortBox) {
+            return false
+        }
+
+        return this.value == other.value
+    }
+
+    override fun hashCode() = value.hashCode()
+
+    override fun toString() = value.toString()
+
+    override fun compareTo(other: Short): Int = value.compareTo(other)
+
+    override fun toByte() = value.toByte()
+    override fun toChar() = value.toChar()
+    override fun toShort() = value.toShort()
+    override fun toInt() = value.toInt()
+    override fun toLong() = value.toLong()
+    override fun toFloat() = value.toFloat()
+    override fun toDouble() = value.toDouble()
+}
+
+fun boxShort(value: Short) = ShortBox(value)
+
 class IntBox(val value: Int) : Number(), Comparable<Int> {
     override fun equals(other: Any?): Boolean {
         if (other !is IntBox) {
@@ -46,4 +116,80 @@ class IntBox(val value: Int) : Number(), Comparable<Int> {
 
 fun boxInt(value: Int) = IntBox(value)
 
-// TODO: support other boxes.
\ No newline at end of file
+class LongBox(val value: Long) : Number(), Comparable<Long> {
+    override fun equals(other: Any?): Boolean {
+        if (other !is LongBox) {
+            return false
+        }
+
+        return this.value == other.value
+    }
+
+    override fun hashCode() = value.hashCode()
+
+    override fun toString() = value.toString()
+
+    override fun compareTo(other: Long): Int = value.compareTo(other)
+
+    override fun toByte() = value.toByte()
+    override fun toChar() = value.toChar()
+    override fun toShort() = value.toShort()
+    override fun toInt() = value.toInt()
+    override fun toLong() = value.toLong()
+    override fun toFloat() = value.toFloat()
+    override fun toDouble() = value.toDouble()
+}
+
+fun boxLong(value: Long) = LongBox(value)
+
+class FloatBox(val value: Float) : Number(), Comparable<Float> {
+    override fun equals(other: Any?): Boolean {
+        if (other !is FloatBox) {
+            return false
+        }
+
+        return this.value == other.value
+    }
+
+    override fun hashCode() = value.hashCode()
+
+    override fun toString() = value.toString()
+
+    override fun compareTo(other: Float): Int = value.compareTo(other)
+
+    override fun toByte() = value.toByte()
+    override fun toChar() = value.toChar()
+    override fun toShort() = value.toShort()
+    override fun toInt() = value.toInt()
+    override fun toLong() = value.toLong()
+    override fun toFloat() = value.toFloat()
+    override fun toDouble() = value.toDouble()
+}
+
+fun boxFloat(value: Float) = FloatBox(value)
+
+class DoubleBox(val value: Double) : Number(), Comparable<Double> {
+    override fun equals(other: Any?): Boolean {
+        if (other !is DoubleBox) {
+            return false
+        }
+
+        return this.value == other.value
+    }
+
+    override fun hashCode() = value.hashCode()
+
+    override fun toString() = value.toString()
+
+    override fun compareTo(other: Double): Int = value.compareTo(other)
+
+    override fun toByte() = value.toByte()
+    override fun toChar() = value.toChar()
+    override fun toShort() = value.toShort()
+    override fun toInt() = value.toInt()
+    override fun toLong() = value.toLong()
+    override fun toFloat() = value.toFloat()
+    override fun toDouble() = value.toDouble()
+}
+
+fun boxDouble(value: Double) = DoubleBox(value)