| Safe Haskell | Safe-Inferred |
|---|---|
| Language | Haskell2010 |
Posit.Internal.PositC
Contents
Description
Library implementing standard 'Posit-3.2' numbers, as defined by the Posit Working Group 23 June 2018.
Synopsis
- class FixedWidthInteger (IntN es) => PositC (es :: ES) where
- encode :: Maybe Rational -> IntN es
- decode :: IntN es -> Maybe Rational
- exponentSize :: Natural
- nBytes :: Natural
- nBits :: Natural
- signBitSize :: Natural
- uSeed :: Natural
- unReal :: IntN es
- mostPosVal :: IntN es
- leastPosVal :: IntN es
- leastNegVal :: IntN es
- mostNegVal :: IntN es
- maxPosRat :: Rational
- minPosRat :: Rational
- maxNegRat :: Rational
- minNegRat :: Rational
- log_uSeed :: (Integer, Rational) -> (Integer, Rational)
- getRegime :: Rational -> (Integer, Rational)
- posit2TupPosit :: Rational -> (Bool, Integer, Natural, Rational)
- buildIntRep :: Rational -> IntN es
- mkIntRep :: Integer -> Natural -> Rational -> IntN es
- formRegime :: Integer -> (IntN es, Integer)
- formExponent :: Natural -> Integer -> (IntN es, Integer)
- formFraction :: Rational -> Integer -> IntN es
- tupPosit2Posit :: (Bool, Integer, Natural, Rational) -> Maybe Rational
- regime2Integer :: IntN es -> (Integer, Int)
- findRegimeFormat :: IntN es -> Bool
- countRegimeBits :: Bool -> IntN es -> Int
- exponent2Nat :: Int -> IntN es -> Natural
- fraction2Posit :: Int -> IntN es -> Rational
- displayBin :: IntN es -> String
- decimalPrec :: Int
- data ES
- type family IntN (es :: ES) = r | r -> es where ...
- type FixedWidthInteger a = (Bits a, Bounded a, Enum a, Integral a, Eq a, Ord a, Num a, Read a, Show a, Storable a)
Documentation
class FixedWidthInteger (IntN es) => PositC (es :: ES) where Source #
The Posit class is an approximation of ℝ, it is like a sampling
on the Projective Real line ℙ(ℝ) with Maybe ℚ as the internal type.
The es is an index that controlls the log2 word size of the Posit's
fininte precision representation.
Minimal complete definition
Methods
Arguments
| :: Maybe Rational | |
| -> IntN es | Maybe you have some Rational Number and you want to encode it as some integer with a finite integer log2 word size. |
Transform to/from the Infinite Precision Representation
Arguments
| :: IntN es | |
| -> Maybe Rational | You have an integer with a finite integer log2 word size decode it and Maybe it is Rational |
Arguments
| :: Natural | The exponent size, |
Exponent Size based on the Posit Exponent kind ES
Various other size definitions used in the Posit format with their default definitions
Arguments
| :: Natural |
|
Arguments
| :: IntN es |
|
Integer Representation of common bounds
mostPosVal :: IntN es Source #
leastPosVal :: IntN es Source #
leastNegVal :: IntN es Source #
mostNegVal :: IntN es Source #
maxPosRat :: Rational Source #
minPosRat :: Rational Source #
maxNegRat :: Rational Source #
minNegRat :: Rational Source #
log_uSeed :: (Integer, Rational) -> (Integer, Rational) Source #
getRegime :: Rational -> (Integer, Rational) Source #
posit2TupPosit :: Rational -> (Bool, Integer, Natural, Rational) Source #
buildIntRep :: Rational -> IntN es Source #
mkIntRep :: Integer -> Natural -> Rational -> IntN es Source #
formRegime :: Integer -> (IntN es, Integer) Source #
formExponent :: Natural -> Integer -> (IntN es, Integer) Source #
formFraction :: Rational -> Integer -> IntN es Source #
tupPosit2Posit :: (Bool, Integer, Natural, Rational) -> Maybe Rational Source #
regime2Integer :: IntN es -> (Integer, Int) Source #
findRegimeFormat :: IntN es -> Bool Source #
countRegimeBits :: Bool -> IntN es -> Int Source #
exponent2Nat :: Int -> IntN es -> Natural Source #
fraction2Posit :: Int -> IntN es -> Rational Source #
displayBin :: IntN es -> String Source #
decimalPrec :: Int Source #
Instances
The Exponent Size ES kind, the constructor for the Type is a Roman Numeral.
type family IntN (es :: ES) = r | r -> es where ... Source #
Type of the Finite Precision Representation, in our case Int8,
Int16, Int32, Int64, Int128, Int256. The es of kind ES will
determine a result of r such that you can determine the es by the
r
type FixedWidthInteger a = (Bits a, Bounded a, Enum a, Integral a, Eq a, Ord a, Num a, Read a, Show a, Storable a) Source #
The FixedWidthInteger is a Constraint Synonym that contains all
of the constraints provided by the IntN Type Family. It is a super
class for the Posit Class.
Orphan instances
| Storable Int128 Source # | |
| Storable Int256 Source # | |
| Storable Word128 Source # | |