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diff --git a/lib/core/unsigned.nim b/lib/core/unsigned.nim
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--- a/lib/core/unsigned.nim
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@@ -1,59 +0,0 @@
-#
-#
-#            Nimrod's Runtime Library
-#        (c) Copyright 2012 Andreas Rumpf
-#
-#    See the file "copying.txt", included in this
-#    distribution, for details about the copyright.
-#
-
-## This module implements basic arithmetic operators for unsigned integers.
-## To discourage users from using ``unsigned``, it's not part of ``system``,
-## but an extra import.
-
-type
-  SomeUInt = uint|uint8|uint16|uint32|uint64
-
-proc `not`*[T: SomeUInt](x: T): T {.magic: "BitnotI", noSideEffect.}
-  ## computes the `bitwise complement` of the integer `x`.
-
-proc `shr`*[T: SomeUInt](x, y: T): T {.magic: "ShrI", noSideEffect.}
-  ## computes the `shift right` operation of `x` and `y`.
-
-proc `shl`*[T: SomeUInt](x, y: T): T {.magic: "ShlI", noSideEffect.}
-  ## computes the `shift left` operation of `x` and `y`.
-
-proc `and`*[T: SomeUInt](x, y: T): T {.magic: "BitandI", noSideEffect.}
-  ## computes the `bitwise and` of numbers `x` and `y`.
-
-proc `or`*[T: SomeUInt](x, y: T): T {.magic: "BitorI", noSideEffect.}
-  ## computes the `bitwise or` of numbers `x` and `y`.
-
-proc `xor`*[T: SomeUInt](x, y: T): T {.magic: "BitxorI", noSideEffect.}
-  ## computes the `bitwise xor` of numbers `x` and `y`.
-
-proc `==`*[T: SomeUInt](x, y: T): bool {.magic: "EqI", noSideEffect.}
-  ## Compares two unsigned integers for equality.
-
-proc `+`*[T: SomeUInt](x, y: T): T {.magic: "AddU", noSideEffect.}
-  ## Binary `+` operator for unsigned integers.
-
-proc `-`*[T: SomeUInt](x, y: T): T {.magic: "SubU", noSideEffect.}
-  ## Binary `-` operator for unsigned integers.
-
-proc `*`*[T: SomeUInt](x, y: T): T {.magic: "MulU", noSideEffect.}
-  ## Binary `*` operator for unsigned integers.
-
-proc `div`*[T: SomeUInt](x, y: T): T {.magic: "DivU", noSideEffect.}
-  ## computes the integer division. This is roughly the same as
-  ## ``floor(x/y)``.
-
-proc `mod`*[T: SomeUInt](x, y: T): T {.magic: "ModU", noSideEffect.}
-  ## computes the integer modulo operation. This is the same as
-  ## ``x - (x div y) * y``.
-
-proc `<=`*[T: SomeUInt](x, y: T): bool {.magic: "LeU", noSideEffect.}
-  ## Returns true iff ``x <= y``.
-
-proc `<`*[T: SomeUInt](x, y: T): bool {.magic: "LtU", noSideEffect.}
-  ## Returns true iff ``unsigned(x) < unsigned(y)``.