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#
#
# 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)``.
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