2018-02-16 10:33:11 +00:00
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# Copyright (c) 2018 Status Research & Development GmbH
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# Distributed under the MIT License (license terms are at http://opensource.org/licenses/MIT).
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2018-02-16 12:54:38 +00:00
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import ./private/utils,
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uint_type
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2018-02-16 10:33:11 +00:00
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proc `not`*(x: MpUint): MpUint {.noInit, noSideEffect, inline.}=
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## Bitwise complement of unsigned integer x
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result.lo = not x.lo
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result.hi = not x.hi
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proc `or`*(x, y: MpUint): MpUint {.noInit, noSideEffect, inline.}=
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## `Bitwise or` of numbers x and y
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result.lo = x.lo or y.lo
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result.hi = x.hi or y.hi
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proc `and`*(x, y: MpUint): MpUint {.noInit, noSideEffect, inline.}=
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## `Bitwise and` of numbers x and y
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result.lo = x.lo and y.lo
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result.hi = x.hi and y.hi
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proc `xor`*(x, y: MpUint): MpUint {.noInit, noSideEffect, inline.}=
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## `Bitwise xor` of numbers x and y
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result.lo = x.lo xor y.lo
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2018-02-16 12:54:38 +00:00
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result.hi = x.hi xor y.hi
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proc `shl`*[T: MpUint](x: T, y: SomeInteger): T {.noInit, noSideEffect.}
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# Forward declaration
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proc `shl`*[T: MpUint](x: T, y: SomeInteger): T {.noInit, noSideEffect.}=
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## Compute the `shift left` operation of x and y
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if y == 0:
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return x
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let # TODO: should be a const - https://github.com/nim-lang/Nim/pull/5664
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size = (T.sizeof * 8)
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halfSize = size div 2
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type Sub = getSubType T
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2018-02-16 13:30:07 +00:00
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if y < halfSize:
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2018-02-16 12:54:38 +00:00
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result.hi = (x.hi shl y) or (x.lo shr (halfSize - y))
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result.lo = x.lo shl y
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else:
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2018-02-16 13:30:07 +00:00
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result.hi = x.lo shl (y - halfSize)
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2018-02-16 12:54:38 +00:00
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result.lo = 0.Sub
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proc `shr`*[T: MpUint](x: T, y: SomeInteger): T {.noInit, noSideEffect.}=
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## Compute the `shift right` operation of x and y
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if y == 0:
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return x
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let # TODO: should be a const - https://github.com/nim-lang/Nim/pull/5664
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size = (T.sizeof * 8)
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halfSize = size div 2
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type Sub = getSubType T
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2018-02-16 13:30:07 +00:00
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if y < halfSize:
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2018-02-16 12:54:38 +00:00
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result.lo = (x.lo shr y) or (x.hi shl (halfSize - y))
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result.hi = x.hi shr y
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else:
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2018-02-16 13:30:07 +00:00
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result.hi = x.hi shr (y - halfSize)
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result.lo = 0.Sub
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