Data.Array.Repa.Repr.Cursored

Documentation

data C

Cursored Arrays. These are produced by Repa's stencil functions, and help the fusion framework to share index compuations between array elements.

The basic idea is described in ``Efficient Parallel Stencil Convolution'', Ben Lippmeier and Gabriele Keller, Haskell 2011 -- though the underlying array representation has changed since this paper was published.

Instances

Source C a

Compute elements of a cursored array.

Elt e => LoadRange C DIM2 e

Compute a range of elements in a rank-2 array.

Elt e => Load C DIM2 e

Compute all elements in an rank-2 array.

Structured C a b

type TR C = C

data Array C sh a where

• ACursored :: {
  • cursoredExtent :: !sh
  • makeCursor :: sh -> cursor
  • shiftCursor :: sh -> cursor -> cursor
  • loadCursor :: cursor -> a
  } -> Array C sh a

makeCursored

Arguments

:: sh

-> (sh -> cursor)

Create a cursor for an index.

-> (sh -> cursor -> cursor)

Shift a cursor by an offset.

-> (cursor -> e)

Compute the element at the cursor.

-> Array C sh e

Define a new cursored array.