Copyright	(C) 2013-2016 University of Twente
License	BSD2 (see the file LICENSE)
Maintainer	Christiaan Baaij <christiaan.baaij@gmail.com>
Safe Haskell	Safe
Language	Haskell2010
Extensions	MonoLocalBinds ScopedTypeVariables BangPatterns TypeFamilies ViewPatterns DataKinds InstanceSigs StandaloneDeriving DeriveDataTypeable DeriveFunctor DeriveTraversable DeriveFoldable DeriveGeneric DefaultSignatures DeriveLift DerivingStrategies ConstrainedClassMethods MultiParamTypeClasses MagicHash KindSignatures TupleSections TypeOperators ExplicitNamespaces ExplicitForAll BinaryLiterals TypeApplications

Clash.Class.Num

Contents

Arithmetic functions for arguments and results of different precision
Saturating arithmetic functions

Description

Synopsis

class ExtendingNum a b where
- type AResult a b
- type MResult a b
- add :: a -> b -> AResult a b
- sub :: a -> b -> AResult a b
- mul :: a -> b -> MResult a b
data SaturationMode
- = SatWrap
- | SatBound
- | SatZero
- | SatSymmetric
class (Bounded a, Num a) => SaturatingNum a where
- satAdd :: SaturationMode -> a -> a -> a
- satSub :: SaturationMode -> a -> a -> a
- satMul :: SaturationMode -> a -> a -> a
boundedAdd :: SaturatingNum a => a -> a -> a
boundedSub :: SaturatingNum a => a -> a -> a
boundedMul :: SaturatingNum a => a -> a -> a
satSucc :: SaturatingNum a => SaturationMode -> a -> a
satPred :: SaturatingNum a => SaturationMode -> a -> a

Arithmetic functions for arguments and results of different precision

class ExtendingNum a b where Source #

Adding, subtracting, and multiplying values of two different (sub-)types.

Associated Types

type AResult a b Source #

Type of the result of the addition or subtraction

type MResult a b Source #

Type of the result of the multiplication

Methods

add :: a -> b -> AResult a b Source #

Add values of different (sub-)types, return a value of a (sub-)type that is potentially different from either argument.

sub :: a -> b -> AResult a b Source #

Subtract values of different (sub-)types, return a value of a (sub-)type that is potentially different from either argument.

mul :: a -> b -> MResult a b Source #

Multiply values of different (sub-)types, return a value of a (sub-)type that is potentially different from either argument.

Instances

(KnownNat m, KnownNat n) => ExtendingNum (BitVector m) (BitVector n) Source #
Instance details Defined in Clash.Sized.Internal.BitVector Associated Types type AResult (BitVector m) (BitVector n) :: Type Source # type MResult (BitVector m) (BitVector n) :: Type Source # Methods add :: BitVector m -> BitVector n -> AResult (BitVector m) (BitVector n) Source # sub :: BitVector m -> BitVector n -> AResult (BitVector m) (BitVector n) Source # mul :: BitVector m -> BitVector n -> MResult (BitVector m) (BitVector n) Source #
ExtendingNum (Index m) (Index n) Source #
Instance details Defined in Clash.Sized.Internal.Index Associated Types type AResult (Index m) (Index n) :: Type Source # type MResult (Index m) (Index n) :: Type Source # Methods add :: Index m -> Index n -> AResult (Index m) (Index n) Source # sub :: Index m -> Index n -> AResult (Index m) (Index n) Source # mul :: Index m -> Index n -> MResult (Index m) (Index n) Source #
(KnownNat m, KnownNat n) => ExtendingNum (Unsigned m) (Unsigned n) Source #
Instance details Defined in Clash.Sized.Internal.Unsigned Associated Types type AResult (Unsigned m) (Unsigned n) :: Type Source # type MResult (Unsigned m) (Unsigned n) :: Type Source # Methods add :: Unsigned m -> Unsigned n -> AResult (Unsigned m) (Unsigned n) Source # sub :: Unsigned m -> Unsigned n -> AResult (Unsigned m) (Unsigned n) Source # mul :: Unsigned m -> Unsigned n -> MResult (Unsigned m) (Unsigned n) Source #
ExtendingNum (Signed m) (Signed n) Source #
Instance details Defined in Clash.Sized.Internal.Signed Associated Types type AResult (Signed m) (Signed n) :: Type Source # type MResult (Signed m) (Signed n) :: Type Source # Methods add :: Signed m -> Signed n -> AResult (Signed m) (Signed n) Source # sub :: Signed m -> Signed n -> AResult (Signed m) (Signed n) Source # mul :: Signed m -> Signed n -> MResult (Signed m) (Signed n) Source #
ENumFixedC rep int1 frac1 int2 frac2 => ExtendingNum (Fixed rep int1 frac1) (Fixed rep int2 frac2) Source #	When used in a polymorphic setting, use the following Constraint synonyms for less verbose type signatures: `ENumFixedC rep frac1 frac2 size1 size2` for: `Fixed` `ENumSFixedC int1 frac1 int2 frac2` for: `SFixed` `ENumUFixedC int1 frac1 int2 frac2` for: `UFixed`
Instance details Defined in Clash.Sized.Fixed Associated Types type AResult (Fixed rep int1 frac1) (Fixed rep int2 frac2) :: Type Source # type MResult (Fixed rep int1 frac1) (Fixed rep int2 frac2) :: Type Source # Methods add :: Fixed rep int1 frac1 -> Fixed rep int2 frac2 -> AResult (Fixed rep int1 frac1) (Fixed rep int2 frac2) Source # sub :: Fixed rep int1 frac1 -> Fixed rep int2 frac2 -> AResult (Fixed rep int1 frac1) (Fixed rep int2 frac2) Source # mul :: Fixed rep int1 frac1 -> Fixed rep int2 frac2 -> MResult (Fixed rep int1 frac1) (Fixed rep int2 frac2) Source #

Saturating arithmetic functions

data SaturationMode Source #

Determine how overflow and underflow are handled by the functions in SaturatingNum

Constructors

SatWrap	Wrap around on overflow and underflow
SatBound	Become `maxBound` on overflow, and `minBound` on underflow
SatZero	Become `0` on overflow and underflow
SatSymmetric	Become `maxBound` on overflow, and (`minBound + 1`) on underflow for signed numbers, and `minBound` for unsigned numbers.

Instances

Eq SaturationMode Source #
Instance details Defined in Clash.Class.Num Methods (==) :: SaturationMode -> SaturationMode -> Bool # (/=) :: SaturationMode -> SaturationMode -> Bool #

class (Bounded a, Num a) => SaturatingNum a where Source #

Num operators in which overflow and underflow behavior can be specified using SaturationMode.

Methods

satAdd :: SaturationMode -> a -> a -> a Source #

Addition with parameterizable over- and underflow behavior

satSub :: SaturationMode -> a -> a -> a Source #

Subtraction with parameterizable over- and underflow behavior

satMul :: SaturationMode -> a -> a -> a Source #

Multiplication with parameterizable over- and underflow behavior

Instances

KnownNat n => SaturatingNum (BitVector n) Source #
Instance details Defined in Clash.Sized.Internal.BitVector Methods satAdd :: SaturationMode -> BitVector n -> BitVector n -> BitVector n Source # satSub :: SaturationMode -> BitVector n -> BitVector n -> BitVector n Source # satMul :: SaturationMode -> BitVector n -> BitVector n -> BitVector n Source #
(KnownNat n, 1 <= n) => SaturatingNum (Index n) Source #
Instance details Defined in Clash.Sized.Internal.Index Methods satAdd :: SaturationMode -> Index n -> Index n -> Index n Source # satSub :: SaturationMode -> Index n -> Index n -> Index n Source # satMul :: SaturationMode -> Index n -> Index n -> Index n Source #
KnownNat n => SaturatingNum (Unsigned n) Source #
Instance details Defined in Clash.Sized.Internal.Unsigned Methods satAdd :: SaturationMode -> Unsigned n -> Unsigned n -> Unsigned n Source # satSub :: SaturationMode -> Unsigned n -> Unsigned n -> Unsigned n Source # satMul :: SaturationMode -> Unsigned n -> Unsigned n -> Unsigned n Source #
KnownNat n => SaturatingNum (Signed n) Source #
Instance details Defined in Clash.Sized.Internal.Signed Methods satAdd :: SaturationMode -> Signed n -> Signed n -> Signed n Source # satSub :: SaturationMode -> Signed n -> Signed n -> Signed n Source # satMul :: SaturationMode -> Signed n -> Signed n -> Signed n Source #
NumFixedC rep int frac => SaturatingNum (Fixed rep int frac) Source #
Instance details Defined in Clash.Sized.Fixed Methods satAdd :: SaturationMode -> Fixed rep int frac -> Fixed rep int frac -> Fixed rep int frac Source # satSub :: SaturationMode -> Fixed rep int frac -> Fixed rep int frac -> Fixed rep int frac Source # satMul :: SaturationMode -> Fixed rep int frac -> Fixed rep int frac -> Fixed rep int frac Source #

boundedAdd :: SaturatingNum a => a -> a -> a Source #

Addition that clips to maxBound on overflow, and minBound on underflow

boundedSub :: SaturatingNum a => a -> a -> a Source #

Subtraction that clips to maxBound on overflow, and minBound on underflow

boundedMul :: SaturatingNum a => a -> a -> a Source #

Multiplication that clips to maxBound on overflow, and minBound on underflow

satSucc :: SaturatingNum a => SaturationMode -> a -> a Source #

Get successor of (or in other words, add 1 to) given number

satPred :: SaturatingNum a => SaturationMode -> a -> a Source #

Get predecessor of (or in other words, subtract 1 from) given number