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| Description |
| This module gives a representation core programs as typed expressions (see
Expr / Data).
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| Synopsis |
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| | | data Data a = Typeable a => Data {} | | | data a :-> b = Typeable a => Lambda (Data a -> Data b) (Data a) (Data b) | | | dataType :: forall a. Data a -> Tuple StorableType | | | dataId :: Data a -> Unique | | | dataToExpr :: Data a -> Expr a | | | exprToData :: Typeable a => Size a -> Expr a -> Data a | | | freshVar :: Typeable a => Size a -> Data a | | | lambda :: Typeable a => Size a -> (Data a -> Data b) -> a :-> b | | | apply :: (a :-> b) -> Data a -> Data b | | | resultSize :: (a :-> b) -> Size b | | | (|$|) :: Expr (a -> b) -> Data a -> Expr b | | | _function :: Typeable b => String -> (Size a -> Size b) -> (a -> b) -> Data a -> Data b | | | _function2 :: Typeable c => String -> (Size a -> Size b -> Size c) -> (a -> b -> c) -> Data a -> Data b -> Data c | | | _function3 :: Typeable d => String -> (Size a -> Size b -> Size c -> Size d) -> (a -> b -> c -> d) -> Data a -> Data b -> Data c -> Data d | | | _function4 :: Typeable e => String -> (Size a -> Size b -> Size c -> Size d -> Size e) -> (a -> b -> c -> d -> e) -> Data a -> Data b -> Data c -> Data d -> Data e | | | tup2 :: (Typeable a, Typeable b) => Data a -> Data b -> Data (a, b) | | | tup3 :: (Typeable a, Typeable b, Typeable c) => Data a -> Data b -> Data c -> Data (a, b, c) | | | tup4 :: (Typeable a, Typeable b, Typeable c, Typeable d) => Data a -> Data b -> Data c -> Data d -> Data (a, b, c, d) | | | get21 :: Typeable a => Data (a, b) -> Data a | | | get22 :: Typeable b => Data (a, b) -> Data b | | | get31 :: Typeable a => Data (a, b, c) -> Data a | | | get32 :: Typeable b => Data (a, b, c) -> Data b | | | get33 :: Typeable c => Data (a, b, c) -> Data c | | | get41 :: Typeable a => Data (a, b, c, d) -> Data a | | | get42 :: Typeable b => Data (a, b, c, d) -> Data b | | | get43 :: Typeable c => Data (a, b, c, d) -> Data c | | | get44 :: Typeable d => Data (a, b, c, d) -> Data d | | | class Typeable (Internal a) => Computable a where | | | | lowerFun :: (Computable a, Computable b) => (a -> b) -> Data (Internal a) -> Data (Internal b) | | | liftFun :: (Computable a, Computable b) => (Data (Internal a) -> Data (Internal b)) -> a -> b | | | evalE :: Expr a -> a | | | evalD :: Data a -> a | | | evalF :: (a :-> b) -> a -> b | | | eval :: Computable a => a -> Internal a | | | value :: Storable a => a -> Data a | | | array :: Storable a => Size a -> a -> Data a | | | arrayLen :: Storable a => Data Length -> [a] -> Data [a] | | | unit :: Data () | | | true :: Data Bool | | | false :: Data Bool | | | size :: forall a. Storable a => Data [a] -> [Range Length] | | | cap :: (Storable a, Size a ~ Range b, Ord b) => Range b -> Data a -> Data a | | | function :: (Storable a, Storable b) => String -> (Size a -> Size b) -> (a -> b) -> Data a -> Data b | | | function2 :: (Storable a, Storable b, Storable c) => String -> (Size a -> Size b -> Size c) -> (a -> b -> c) -> Data a -> Data b -> Data c | | | function3 :: (Storable a, Storable b, Storable c, Storable d) => String -> (Size a -> Size b -> Size c -> Size d) -> (a -> b -> c -> d) -> Data a -> Data b -> Data c -> Data d | | | function4 :: (Storable a, Storable b, Storable c, Storable d, Storable e) => String -> (Size a -> Size b -> Size c -> Size d -> Size e) -> (a -> b -> c -> d -> e) -> Data a -> Data b -> Data c -> Data d -> Data e | | | getIx :: Storable a => Data [a] -> Data Int -> Data a | | | setIx :: Storable a => Data [a] -> Data Int -> Data a -> Data [a] | | | class RandomAccess a where | | | | noInline :: (Computable a, Computable b) => String -> (a -> b) -> a -> b | | | ifThenElse :: (Computable a, Computable b) => Data Bool -> (a -> b) -> (a -> b) -> a -> b | | | whileSized :: Computable state => Size (Internal state) -> Size (Internal state) -> (state -> Data Bool) -> (state -> state) -> state -> state | | | while :: Computable state => (state -> Data Bool) -> (state -> state) -> state -> state | | | parallel :: Storable a => Data Length -> (Data Int -> Data a) -> Data [a] |
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| Documentation |
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| Typed core language expressions. A value of type Expr a is a
representation of a program that computes a value of type a.
| | Constructors | |
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| A wrapper around Expr to allow observable sharing (see
Feldspar.Core.Ref) and for memoizing size information.
| | Constructors | |  Instances | |
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Computable types. A computable value completely represents a core program,
in such a way that internalize . externalize preserves semantics, but
not necessarily syntax.
The terminology used in this class comes from thinking of the Data type as
the "internal" core language and the Feldspar.Core API as the
"external" core language.
| | | Associated Types | | | Data (Internal a) is the internal representation of the type a.
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| | | Methods | | | Convert to internal representation
| | | | Convert to external representation
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| | | Instances | | Storable a => Computable (Data a) | | Storable a => Computable (Vector (Data a)) | | Storable a => Computable (Vector (Vector (Data a))) | | (Computable a, Computable b) => Computable (a, b) | | (Computable a, Computable b, Computable c) => Computable (a, b, c) | | (Computable a, Computable b, Computable c, Computable d) => Computable (a, b, c, d) |
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| Lower a function to operate on internal representation.
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| Lift a function to operate on external representation.
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| The semantics of expressions
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| The semantics of Data
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| The semantics of any Computable type
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| A program that computes a constant value
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Like value but with an extra Size argument that can be used to increase
the size beyond the given data.
Example 1:
array (10 :> 20 :> universal) [] :: Data [[Int]]
gives an uninitialized 10x20 array of Int elements.
Example 2:
array (10 :> 20 :> universal) [[1,2,3]] :: Data [[Int]]
gives a 10x20 array whose first row is initialized to [1,2,3].
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| Returns the size of each level of a multi-dimensional array, starting with
the outermost level.
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Constructs a one-argument primitive function.
function fun szf f:
- fun is the name of the function.
- szf computes the output size from the input size.
- f gives the evaluation semantics.
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| A two-argument primitive function
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| A three-argument primitive function
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| A four-argument primitive function
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| Look up an index in an array (see also !)
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setIx arr i a:
Replaces the value at index i in the array arr with the value a.
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| class RandomAccess a where | Source |
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| | Associated Types | | | The type of elements in a random access structure
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| | | Methods | | | Index lookup in a random access structure
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Constructs a non-primitive, non-inlined function.
The normal way to make a non-primitive function is to use an ordinary Haskell
function, for example:
myFunc x = x * 4 + 5
However, such functions are inevitably inlined into the program expression
when applied. noInline can be thought of as a way to protect a function
against inlining (but later transformations may choose to inline anyway).
Ideally, it should be posssible to reuse such a function several times, but
at the moment this does not work. Every application of a noInline function
results in a new copy of the function in the core program.
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ifThenElse cond thenFunc elseFunc:
Selects between the two functions thenFunc and elseFunc depending on
whether the condition cond is true or false.
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While-loop
while cont body :: state -> state:
- state is the type of the state.
- cont determines whether or not to continue based on the current state.
- body computes the next state from the current state.
- The result is a function from initial state to final state.
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Parallel array
parallel l ixf:
- l is the length of the resulting array (outermost level).
- ifx is a function that maps each index in the range [0 .. l-1] to its
element.
Since there are no dependencies between the elements, the compiler is free to
compute the elements in any order, or even in parallel.
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| Produced by Haddock version 2.6.0 |
