diff --git a/sdk/xtdk/rtlfuncs.h b/sdk/xtdk/rtlfuncs.h
index 31ae467..681acb9 100644
--- a/sdk/xtdk/rtlfuncs.h
+++ b/sdk/xtdk/rtlfuncs.h
@@ -89,12 +89,27 @@ RtlConcatenateWideString(OUT PWCHAR Destination,
                          IN PWCHAR Source,
                          IN SIZE_T Count);
 
+XTAPI
+LARGE_INTEGER
+RtlConvertToLargeInteger32(IN LONG Value);
+
+XTAPI
+LARGE_INTEGER
+RtlConvertToLargeIntegerUnsigned32(IN ULONG Value);
+
 XTAPI
 VOID
 RtlCopyMemory(OUT PVOID Destination,
               IN PCVOID Source,
               IN SIZE_T Length);
 
+XTAPI
+LARGE_INTEGER
+RtlDivideLargeInteger(IN LARGE_INTEGER Dividend,
+                      IN ULONG Divisor,
+                      OUT PULONG Remainder);
+
+
 XTAPI
 VOID
 RtlFillMemory(OUT PVOID Destination,
@@ -107,6 +122,11 @@ RtlMoveMemory(OUT PVOID Destination,
               IN PCVOID Source,
               IN SIZE_T Length);
 
+XTAPI
+LARGE_INTEGER
+RtlMultiplyLargeInteger(IN LARGE_INTEGER Multiplicand,
+                        IN LONG Multiplier);
+
 XTAPI
 BOOLEAN
 RtlSameMemory(IN PCVOID LeftBuffer,
diff --git a/xtoskrnl/includes/rtli.h b/xtoskrnl/includes/rtli.h
index 34f8efd..57f3b57 100644
--- a/xtoskrnl/includes/rtli.h
+++ b/xtoskrnl/includes/rtli.h
@@ -215,6 +215,46 @@ XTFASTCALL
 ULONGLONG
 RtlByteSwap64(IN ULONGLONG Source);
 
+XTAPI
+INT
+RtlCountLeadingZeroes32(IN ULONG Value);
+
+XTAPI
+INT
+RtlCountLeadingZeroes64(IN ULONG Value);
+
+XTAPI
+INT
+RtlCountTrailingZeroes32(IN ULONG Value);
+
+XTAPI
+INT
+RtlCountTrailingZeroes64(IN ULONGLONG Value);
+
+XTAPI
+LONGLONG
+RtlDivide32(IN LONG Dividend,
+            IN LONG Divisor,
+            OUT PLONG Remainder);
+
+XTAPI
+LONGLONG
+RtlDivide64(IN LONGLONG Dividend,
+            IN LONGLONG Divisor,
+            OUT PLONGLONG Remainder);
+
+XTAPI
+ULONGLONG
+RtlDivideUnsigned32(IN ULONG Dividend,
+                    IN ULONG Divisor,
+                    OUT PULONG Remainder);
+
+XTAPI
+ULONGLONG
+RtlDivideUnsigned64(IN ULONGLONG Dividend,
+                    IN ULONGLONG Divisor,
+                    OUT PULONGLONG Remainder);
+
 XTCDECL
 VOID
 RtlInitializeListHead(IN PLIST_ENTRY ListHead);