Library for bitwise operations.
Bitwise AND
Bitwise OR
Bitwise XOR
Flip each bit individually, often called bitwise NOT
Shift bits to the left by a given offset, filling new bits with zeros. This can be used to multiply numbers by powers of two.
shiftLeftBy 1 5 == 10
shiftLeftBy 5 1 == 32
Shift bits to the right by a given offset, filling new bits with whatever is the topmost bit. This can be used to divide numbers by powers of two.
shiftRightBy 1 32 == 16
shiftRightBy 2 32 == 8
shiftRightBy 1 -32 == -16
This is called an arithmetic right shift, often written (>>), and sometimes called a sign-propagating right shift because it fills empty spots with copies of the highest bit.
Shift bits to the right by a given offset, filling new bits with zeros.
shiftRightZfBy 1 32 == 16
shiftRightZfBy 2 32 == 8
shiftRightZfBy 1 -32 == 2147483632
This is called an logical right shift, often written (>>>), and sometimes called a zero-fill right shift because it fills empty spots with zeros.
module Bitwise exposing
( and, or, xor, complement
, shiftLeftBy, shiftRightBy, shiftRightZfBy
)
{-| Library for [bitwise operations](http://en.wikipedia.org/wiki/Bitwise_operation).
# Basic Operations
@docs and, or, xor, complement
# Bit Shifts
@docs shiftLeftBy, shiftRightBy, shiftRightZfBy
-}
import Native.Bitwise
{-| Bitwise AND
-}
and : Int -> Int -> Int
and =
Native.Bitwise.and
{-| Bitwise OR
-}
or : Int -> Int -> Int
or =
Native.Bitwise.or
{-| Bitwise XOR
-}
xor : Int -> Int -> Int
xor =
Native.Bitwise.xor
{-| Flip each bit individually, often called bitwise NOT
-}
complement : Int -> Int
complement =
Native.Bitwise.complement
{-| Shift bits to the left by a given offset, filling new bits with zeros.
This can be used to multiply numbers by powers of two.
shiftLeftBy 1 5 == 10
shiftLeftBy 5 1 == 32
-}
shiftLeftBy : Int -> Int -> Int
shiftLeftBy =
Native.Bitwise.shiftLeftBy
{-| Shift bits to the right by a given offset, filling new bits with
whatever is the topmost bit. This can be used to divide numbers by powers of two.
shiftRightBy 1 32 == 16
shiftRightBy 2 32 == 8
shiftRightBy 1 -32 == -16
This is called an [arithmetic right shift][ars], often written (>>), and
sometimes called a sign-propagating right shift because it fills empty spots
with copies of the highest bit.
[ars]: http://en.wikipedia.org/wiki/Bitwise_operation#Arithmetic_shift
-}
shiftRightBy : Int -> Int -> Int
shiftRightBy =
Native.Bitwise.shiftRightBy
{-| Shift bits to the right by a given offset, filling new bits with zeros.
shiftRightZfBy 1 32 == 16
shiftRightZfBy 2 32 == 8
shiftRightZfBy 1 -32 == 2147483632
This is called an [logical right shift][lrs], often written (>>>), and
sometimes called a zero-fill right shift because it fills empty spots with
zeros.
[lrs]: http://en.wikipedia.org/wiki/Bitwise_operation#Logical_shift
-}
shiftRightZfBy : Int -> Int -> Int
shiftRightZfBy =
Native.Bitwise.shiftRightZfBy