add basic logical operations

src/mpint.nim

@@ -3,8 +3,10 @@
 
 import  ./uint_type,
         ./uint_init,
+        ./uint_bitwise_ops,
         ./uint_binary_ops
 
 export  uint_type,
         uint_init,
+        uint_bitwise_ops,
         uint_binary_ops

src/uint_bitwise_ops.nim

@@ -0,0 +1,25 @@
+# Copyright (c) 2018 Status Research & Development GmbH
+# Distributed under the MIT License (license terms are at http://opensource.org/licenses/MIT).
+
+import  uint_type
+
+
+proc `not`*(x: MpUint): MpUint {.noInit, noSideEffect, inline.}=
+  ## Bitwise complement of unsigned integer x
+  result.lo = not x.lo
+  result.hi = not x.hi
+
+proc `or`*(x, y: MpUint): MpUint {.noInit, noSideEffect, inline.}=
+  ## `Bitwise or` of numbers x and y
+  result.lo = x.lo or y.lo
+  result.hi = x.hi or y.hi
+
+proc `and`*(x, y: MpUint): MpUint {.noInit, noSideEffect, inline.}=
+  ## `Bitwise and` of numbers x and y
+  result.lo = x.lo and y.lo
+  result.hi = x.hi and y.hi
+
+proc `xor`*(x, y: MpUint): MpUint {.noInit, noSideEffect, inline.}=
+  ## `Bitwise xor` of numbers x and y
+  result.lo = x.lo xor y.lo
+  result.hi = x.hi xor y.hi