Data.Yarr.Utils.Primitive

Documentation

class Touchable a where

Mainly used to fight against GHC simplifier, which gives no chance to LLVM to perform Global Value Numbering optimization.

Copied from repa, see http://hackage.haskell.org/packages/archive/repa/3.2.3.1/doc/html/Data-Array-Repa-Eval.html

Methods

touch :: a -> IO ()

The function intented to be passed as 3rd parameter to unrolled- functions in Shape class and dim2BlockFill.

If your loading operation is strictly local by elements (in most cases), use noTouch instead of this function.

Instances

Touchable Bool

Touchable Double

Touchable Float

Touchable Int

Touchable Int8

Touchable Int16

Touchable Int32

Touchable Int64

Touchable Word

Touchable Word8

Touchable Word16

Touchable Word32

Touchable Word64

(Vector v e, Touchable e) => Touchable (v e)

noTouch :: a -> IO ()

Alias to (\_ -> return ()).

class PrimitiveOrd a where

GHC simplifier tends to float numeric comparsions as high in execution graph as possible, which in conjunction with loop unrolling sometimes leads to dramatic code bloat.

I'm not sure -M functions work at all, but strict versions defenitely keep comparsions unfloated.

Methods

minM :: a -> a -> IO a

Maybe sequential min.

minM' :: a -> a -> IO a

Definetely sequential min.

maxM :: a -> a -> IO a

Maybe sequential max.

maxM' :: a -> a -> IO a

Definetely sequential max.

clampM

Arguments

:: a

Min bound

-> a

Max bound

-> a

Value to clamp

-> IO a

Value in bounds

Maybe sequential clamp.

clampM'

Arguments

:: a

Min bound

-> a

Max bound

-> a

Value to clamp

-> IO a

Value in bounds

Definetely sequential clamp.

Instances

PrimitiveOrd Char

PrimitiveOrd Double

PrimitiveOrd Float

PrimitiveOrd Int

PrimitiveOrd Word