diff --git a/xtoskrnl/includes/rtl.hh b/xtoskrnl/includes/rtl.hh
index d293344..37fb705 100644
--- a/xtoskrnl/includes/rtl.hh
+++ b/xtoskrnl/includes/rtl.hh
@@ -11,6 +11,8 @@
 
 #include <xtos.hh>
 
+#include XTOS_ARCH_HEADER(rtl, intrin.hh)
+
 #include <rtl/atomic.hh>
 #include <rtl/bitmap.hh>
 #include <rtl/dispatch.hh>
diff --git a/xtoskrnl/includes/rtl/amd64/intrin.hh b/xtoskrnl/includes/rtl/amd64/intrin.hh
new file mode 100644
index 0000000..377f621
--- /dev/null
+++ b/xtoskrnl/includes/rtl/amd64/intrin.hh
@@ -0,0 +1,17 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/includes/rtl/amd64/intrin.hh
+ * DESCRIPTION:     Compiler intrinsic support routines
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#ifndef __XTOSKRNL_RTL_AMD64_INTRIN_HH
+#define __XTOSKRNL_RTL_AMD64_INTRIN_HH
+
+#include <xtos.hh>
+
+
+/* Forward declarations enforcing the XTAPI calling convention and preserving the raw unmangled symbol names */
+
+#endif /* __XTOSKRNL_RTL_AMD64_INTRIN_HH */
diff --git a/xtoskrnl/includes/rtl/i686/intrin.hh b/xtoskrnl/includes/rtl/i686/intrin.hh
new file mode 100644
index 0000000..a207eed
--- /dev/null
+++ b/xtoskrnl/includes/rtl/i686/intrin.hh
@@ -0,0 +1,23 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/includes/rtl/i686/intrin.hh
+ * DESCRIPTION:     Compiler intrinsic support routines
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#ifndef __XTOSKRNL_RTL_I686_INTRIN_HH
+#define __XTOSKRNL_RTL_I686_INTRIN_HH
+
+#include <xtos.hh>
+
+
+/* Forward declarations enforcing the XTAPI calling convention and preserving the raw unmangled symbol names */
+XTCLINK XTAPI LONGLONG _alldiv(IN LONGLONG Dividend, IN LONGLONG Divisor) XTSYMBOL("__alldiv");
+XTCLINK XTAPI LONGLONG _alldvrm(IN LONGLONG Dividend, IN LONGLONG Divisor, OUT PLONGLONG Remainder) XTSYMBOL("__alldvrm");
+XTCLINK XTAPI LONGLONG _allrem(IN LONGLONG Dividend, IN LONGLONG Divisor) XTSYMBOL("__allrem");
+XTCLINK XTAPI ULONGLONG _aulldiv(IN ULONGLONG Dividend, IN ULONGLONG Divisor) XTSYMBOL("__aulldiv");
+XTCLINK XTAPI ULONGLONG _aulldvrm(IN ULONGLONG Dividend, IN ULONGLONG Divisor, OUT PULONGLONG Remainder) XTSYMBOL("__aulldvrm");
+XTCLINK XTAPI ULONGLONG _aullrem(IN ULONGLONG Dividend, IN ULONGLONG Divisor) XTSYMBOL("__aullrem");
+
+#endif /* __XTOSKRNL_RTL_I686_INTRIN_HH */
diff --git a/xtoskrnl/rtl/i686/intrin.cc b/xtoskrnl/rtl/i686/intrin.cc
index bddd45a..8fc14af 100644
--- a/xtoskrnl/rtl/i686/intrin.cc
+++ b/xtoskrnl/rtl/i686/intrin.cc
@@ -9,7 +9,6 @@
 #include <xtos.hh>
 
 
-
 /**
  * Divides a 64-bit signed integer by a 64-bit signed integer.
  *
@@ -24,7 +23,7 @@
  * @since XT 1.0
  */
 XTCLINK
-XTCDECL
+XTAPI
 LONGLONG
 _alldiv(IN LONGLONG Dividend,
         IN LONGLONG Divisor)
@@ -50,7 +49,7 @@ _alldiv(IN LONGLONG Dividend,
  * @since XT 1.0
  */
 XTCLINK
-XTCDECL
+XTAPI
 LONGLONG
 _alldvrm(IN LONGLONG Dividend,
          IN LONGLONG Divisor,
@@ -73,7 +72,7 @@ _alldvrm(IN LONGLONG Dividend,
  * @since XT 1.0
  */
 XTCLINK
-XTCDECL
+XTAPI
 LONGLONG
 _allrem(IN LONGLONG Dividend,
         IN LONGLONG Divisor)
@@ -99,7 +98,7 @@ _allrem(IN LONGLONG Dividend,
  * @since XT 1.0
  */
 XTCLINK
-XTCDECL
+XTAPI
 ULONGLONG
 _aulldiv(IN ULONGLONG Dividend,
          IN ULONGLONG Divisor)
@@ -125,11 +124,11 @@ _aulldiv(IN ULONGLONG Dividend,
  * @since XT 1.0
  */
 XTCLINK
-XTCDECL
+XTAPI
 ULONGLONG
-_aulldvrm(ULONGLONG Dividend,
-          ULONGLONG Divisor,
-          PULONGLONG Remainder)
+_aulldvrm(IN ULONGLONG Dividend,
+          IN ULONGLONG Divisor,
+          OUT PULONGLONG Remainder)
 {
     /* Call the internal unsigned division routine to compute both quotient and remainder */
     return RTL::Math::DivideUnsigned64(Dividend, Divisor, Remainder);
@@ -149,7 +148,7 @@ _aulldvrm(ULONGLONG Dividend,
  * @since XT 1.0
  */
 XTCLINK
-XTCDECL
+XTAPI
 ULONGLONG
 _aullrem(IN ULONGLONG Dividend,
          IN ULONGLONG Divisor)