diff --git a/src/private/conversion.nim b/src/private/conversion.nim
index 821184f..3f6847c 100644
--- a/src/private/conversion.nim
+++ b/src/private/conversion.nim
@@ -7,27 +7,7 @@
 #
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
-import  ./datatypes,
-        macros, typetraits
-
-func initUintImpl*[InType, OutType](x: InType, _: typedesc[OutType]): OutType {.inline.} =
-
-  const
-    size_in = getSize(x)
-    size_out = getSize(result)
-
-  static:
-    assert size_out >= size_in, "The result type size (" & $size_out &
-      " for " & $OutType.name &
-      ") should be equal or bigger than the input type size (" & $size_in &
-      " for " & $InType.name & ")."
-
-  when OutType is SomeUnsignedInt:
-    result = x.OutType
-  elif size_in == size_out:
-    result = cast[type result](x)
-  else:
-    result.lo = initUintImpl(x, type result.lo)
+import  ./datatypes
 
 func toSubtype*[T: SomeInteger](b: bool, _: typedesc[T]): T {.inline.}=
   b.T
@@ -36,19 +16,6 @@ func toSubtype*[T: UintImpl](b: bool, _: typedesc[T]): T {.inline.}=
   type SubTy = type result.lo
   result.lo = toSubtype(b, SubTy)
 
-func zero*[T: BaseUint](_: typedesc[T]): T {.inline.}=
-  discard
-
-func one*[T: BaseUint](_: typedesc[T]): T {.inline.}=
-  when T is SomeUnsignedInt:
-    result = T(1)
-  else:
-    let r_ptr = cast[ptr array[getSize(result) div 8, byte]](result.addr)
-    when system.cpuEndian == bigEndian:
-      r_ptr[0] = 1
-    else:
-      r_ptr[r_ptr[].len - 1] = 1
-
 func toUint*(n: UintImpl): auto {.inline.}=
   ## Casts a multiprecision integer to an uint of the same size
 
diff --git a/src/private/initialization.nim b/src/private/initialization.nim
new file mode 100644
index 0000000..46ccd13
--- /dev/null
+++ b/src/private/initialization.nim
@@ -0,0 +1,42 @@
+# Mpint
+# Copyright 2018 Status Research & Development GmbH
+# Licensed under either of
+#
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+#
+# at your option. This file may not be copied, modified, or distributed except according to those terms.
+
+import ./datatypes, typetraits
+
+func initUintImpl*[InType, OutType](x: InType, _: typedesc[OutType]): OutType {.inline.} =
+
+  const
+    size_in = getSize(x)
+    size_out = getSize(result)
+
+  static:
+    assert size_out >= size_in, "The result type size (" & $size_out &
+      " for " & $OutType.name &
+      ") should be equal or bigger than the input type size (" & $size_in &
+      " for " & $InType.name & ")."
+
+  when OutType is SomeUnsignedInt:
+    result = x.OutType
+  elif size_in == size_out:
+    result = cast[type result](x)
+  else:
+    result.lo = initUintImpl(x, type result.lo)
+
+func zero*[T: BaseUint](_: typedesc[T]): T {.inline.}=
+  discard
+
+func one*[T: BaseUint](_: typedesc[T]): T {.inline.}=
+  when T is SomeUnsignedInt:
+    result = T(1)
+  else:
+    let r_ptr = cast[ptr array[getSize(result) div 8, byte]](result.addr)
+    when system.cpuEndian == bigEndian:
+      r_ptr[0] = 1
+    else:
+      r_ptr[r_ptr[].len - 1] = 1
diff --git a/src/private/int_comparison.nim b/src/private/int_comparison.nim
new file mode 100644
index 0000000..8087682
--- /dev/null
+++ b/src/private/int_comparison.nim
@@ -0,0 +1,40 @@
+# Mpint
+# Copyright 2018 Status Research & Development GmbH
+# Licensed under either of
+#
+#  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
+#  * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
+#
+# at your option. This file may not be copied, modified, or distributed except according to those terms.
+
+import  ./datatypes, ./as_words, ./uint_comparison
+
+func isZero*(n: SomeUnsignedInt): bool {.inline.} =
+  n == 0
+
+func isZero*(n: UintImpl): bool {.inline.} =
+  asWords(n, ignoreEndianness = true):
+    if n != 0:
+      return false
+  return true
+
+func `<`*(x, y: UintImpl): bool {.inline.}=
+  # Lower comparison for multi-precision integers
+  asWordsZip(x, y, ignoreEndianness = false):
+    if x != y:
+      return x < y
+  return false # they're equal
+
+func `==`*(x, y: UintImpl): bool {.inline.}=
+  # Equal comparison for multi-precision integers
+  asWordsZip(x, y, ignoreEndianness = true):
+    if x != y:
+      return false
+  return true # they're equal
+
+func `<=`*(x, y: UintImpl): bool {.inline.}=
+  # Lower or equal comparison for multi-precision integers
+  asWordsZip(x, y, ignoreEndianness = false):
+    if x != y:
+      return x < y
+  return true # they're equal
diff --git a/src/private/uint_div.nim b/src/private/uint_div.nim
index fb65639..d801dad 100644
--- a/src/private/uint_div.nim
+++ b/src/private/uint_div.nim
@@ -7,7 +7,7 @@
 #
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
-import  ./bithacks, ./conversion,
+import  ./bithacks, ./conversion, ./initialization,
         ./datatypes,
         ./uint_comparison,
         ./uint_bitwise_ops,
diff --git a/src/private/uint_mul.nim b/src/private/uint_mul.nim
index e60aad5..cf43162 100644
--- a/src/private/uint_mul.nim
+++ b/src/private/uint_mul.nim
@@ -8,6 +8,7 @@
 # at your option. This file may not be copied, modified, or distributed except according to those terms.
 
 import  ./conversion,
+        ./initialization,
         ./datatypes,
         ./uint_comparison,
         ./uint_addsub