{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE TemplateHaskell #-}

-- | Various boilerplate definitions for the PyOpenCL backend.
module Futhark.CodeGen.Backends.PyOpenCL.Boilerplate
  ( openClInit,
    openClPrelude,
  )
where

import Control.Monad.Identity
import Data.FileEmbed
import qualified Data.Map as M
import qualified Data.Text as T
import qualified Futhark.CodeGen.Backends.GenericPython as Py
import Futhark.CodeGen.Backends.GenericPython.AST
import Futhark.CodeGen.ImpCode.OpenCL
  ( ErrorMsg (..),
    ErrorMsgPart (..),
    FailureMsg (..),
    PrimType (..),
    SizeClass (..),
    errorMsgArgTypes,
    sizeDefault,
    untyped,
  )
import Futhark.CodeGen.OpenCL.Heuristics
import Futhark.Util.Pretty (prettyText)
import NeatInterpolation (text)

errorMsgNumArgs :: ErrorMsg a -> Int
errorMsgNumArgs :: ErrorMsg a -> Int
errorMsgNumArgs = [PrimType] -> Int
forall (t :: * -> *) a. Foldable t => t a -> Int
length ([PrimType] -> Int)
-> (ErrorMsg a -> [PrimType]) -> ErrorMsg a -> Int
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ErrorMsg a -> [PrimType]
forall a. ErrorMsg a -> [PrimType]
errorMsgArgTypes

-- | @rts/python/opencl.py@ embedded as a string.
openClPrelude :: String
openClPrelude :: String
openClPrelude = $(embedStringFile "rts/python/opencl.py")

-- | Python code (as a string) that calls the
-- @initiatialize_opencl_object@ procedure.  Should be put in the
-- class constructor.
openClInit :: [PrimType] -> String -> M.Map Name SizeClass -> [FailureMsg] -> String
openClInit :: [PrimType]
-> String -> Map Name SizeClass -> [FailureMsg] -> String
openClInit [PrimType]
types String
assign Map Name SizeClass
sizes [FailureMsg]
failures =
  Text -> String
T.unpack
    [text|
size_heuristics=$size_heuristics
self.global_failure_args_max = $max_num_args
self.failure_msgs=$failure_msgs
program = initialise_opencl_object(self,
                                   program_src=fut_opencl_src,
                                   command_queue=command_queue,
                                   interactive=interactive,
                                   platform_pref=platform_pref,
                                   device_pref=device_pref,
                                   default_group_size=default_group_size,
                                   default_num_groups=default_num_groups,
                                   default_tile_size=default_tile_size,
                                   default_reg_tile_size=default_reg_tile_size,
                                   default_threshold=default_threshold,
                                   size_heuristics=size_heuristics,
                                   required_types=$types',
                                   user_sizes=sizes,
                                   all_sizes=$sizes')
$assign'
|]
  where
    assign' :: Text
assign' = String -> Text
T.pack String
assign
    size_heuristics :: Text
size_heuristics = PyExp -> Text
forall a. Pretty a => a -> Text
prettyText (PyExp -> Text) -> PyExp -> Text
forall a b. (a -> b) -> a -> b
$ [SizeHeuristic] -> PyExp
sizeHeuristicsToPython [SizeHeuristic]
sizeHeuristicsTable
    types' :: Text
types' = [String] -> Text
forall a. Pretty a => a -> Text
prettyText ([String] -> Text) -> [String] -> Text
forall a b. (a -> b) -> a -> b
$ (PrimType -> String) -> [PrimType] -> [String]
forall a b. (a -> b) -> [a] -> [b]
map (String -> String
forall a. Show a => a -> String
show (String -> String) -> (PrimType -> String) -> PrimType -> String
forall b c a. (b -> c) -> (a -> b) -> a -> c
. PrimType -> String
forall a. Pretty a => a -> String
pretty) [PrimType]
types -- Looks enough like Python.
    sizes' :: Text
sizes' = PyExp -> Text
forall a. Pretty a => a -> Text
prettyText (PyExp -> Text) -> PyExp -> Text
forall a b. (a -> b) -> a -> b
$ Map Name SizeClass -> PyExp
sizeClassesToPython Map Name SizeClass
sizes
    max_num_args :: Text
max_num_args = Int -> Text
forall a. Pretty a => a -> Text
prettyText (Int -> Text) -> Int -> Text
forall a b. (a -> b) -> a -> b
$ (Int -> Int -> Int) -> Int -> [Int] -> Int
forall (t :: * -> *) b a.
Foldable t =>
(b -> a -> b) -> b -> t a -> b
foldl Int -> Int -> Int
forall a. Ord a => a -> a -> a
max Int
0 ([Int] -> Int) -> [Int] -> Int
forall a b. (a -> b) -> a -> b
$ (FailureMsg -> Int) -> [FailureMsg] -> [Int]
forall a b. (a -> b) -> [a] -> [b]
map (ErrorMsg Exp -> Int
forall a. ErrorMsg a -> Int
errorMsgNumArgs (ErrorMsg Exp -> Int)
-> (FailureMsg -> ErrorMsg Exp) -> FailureMsg -> Int
forall b c a. (b -> c) -> (a -> b) -> a -> c
. FailureMsg -> ErrorMsg Exp
failureError) [FailureMsg]
failures
    failure_msgs :: Text
failure_msgs = PyExp -> Text
forall a. Pretty a => a -> Text
prettyText (PyExp -> Text) -> PyExp -> Text
forall a b. (a -> b) -> a -> b
$ [PyExp] -> PyExp
List ([PyExp] -> PyExp) -> [PyExp] -> PyExp
forall a b. (a -> b) -> a -> b
$ (FailureMsg -> PyExp) -> [FailureMsg] -> [PyExp]
forall a b. (a -> b) -> [a] -> [b]
map FailureMsg -> PyExp
formatFailure [FailureMsg]
failures

formatFailure :: FailureMsg -> PyExp
formatFailure :: FailureMsg -> PyExp
formatFailure (FailureMsg (ErrorMsg [ErrorMsgPart Exp]
parts) String
backtrace) =
  String -> PyExp
String (String -> PyExp) -> String -> PyExp
forall a b. (a -> b) -> a -> b
$ (ErrorMsgPart Exp -> String) -> [ErrorMsgPart Exp] -> String
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap ErrorMsgPart Exp -> String
forall a. ErrorMsgPart a -> String
onPart [ErrorMsgPart Exp]
parts String -> String -> String
forall a. [a] -> [a] -> [a]
++ String
"\n" String -> String -> String
forall a. [a] -> [a] -> [a]
++ String -> String
formatEscape String
backtrace
  where
    formatEscape :: String -> String
formatEscape =
      let escapeChar :: Char -> String
escapeChar Char
'{' = String
"{{"
          escapeChar Char
'}' = String
"}}"
          escapeChar Char
c = [Char
c]
       in (Char -> String) -> String -> String
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap Char -> String
escapeChar

    onPart :: ErrorMsgPart a -> String
onPart (ErrorString String
s) = String -> String
formatEscape String
s
    onPart ErrorInt32 {} = String
"{}"
    onPart ErrorInt64 {} = String
"{}"

sizeClassesToPython :: M.Map Name SizeClass -> PyExp
sizeClassesToPython :: Map Name SizeClass -> PyExp
sizeClassesToPython = [(PyExp, PyExp)] -> PyExp
Dict ([(PyExp, PyExp)] -> PyExp)
-> (Map Name SizeClass -> [(PyExp, PyExp)])
-> Map Name SizeClass
-> PyExp
forall b c a. (b -> c) -> (a -> b) -> a -> c
. ((Name, SizeClass) -> (PyExp, PyExp))
-> [(Name, SizeClass)] -> [(PyExp, PyExp)]
forall a b. (a -> b) -> [a] -> [b]
map (Name, SizeClass) -> (PyExp, PyExp)
forall a. Pretty a => (a, SizeClass) -> (PyExp, PyExp)
f ([(Name, SizeClass)] -> [(PyExp, PyExp)])
-> (Map Name SizeClass -> [(Name, SizeClass)])
-> Map Name SizeClass
-> [(PyExp, PyExp)]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Map Name SizeClass -> [(Name, SizeClass)]
forall k a. Map k a -> [(k, a)]
M.toList
  where
    f :: (a, SizeClass) -> (PyExp, PyExp)
f (a
size_name, SizeClass
size_class) =
      ( String -> PyExp
String (String -> PyExp) -> String -> PyExp
forall a b. (a -> b) -> a -> b
$ a -> String
forall a. Pretty a => a -> String
pretty a
size_name,
        [(PyExp, PyExp)] -> PyExp
Dict
          [ (String -> PyExp
String String
"class", String -> PyExp
String (String -> PyExp) -> String -> PyExp
forall a b. (a -> b) -> a -> b
$ SizeClass -> String
forall a. Pretty a => a -> String
pretty SizeClass
size_class),
            ( String -> PyExp
String String
"value",
              PyExp -> (Int64 -> PyExp) -> Maybe Int64 -> PyExp
forall b a. b -> (a -> b) -> Maybe a -> b
maybe PyExp
None (Integer -> PyExp
Integer (Integer -> PyExp) -> (Int64 -> Integer) -> Int64 -> PyExp
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Int64 -> Integer
forall a b. (Integral a, Num b) => a -> b
fromIntegral) (Maybe Int64 -> PyExp) -> Maybe Int64 -> PyExp
forall a b. (a -> b) -> a -> b
$
                SizeClass -> Maybe Int64
sizeDefault SizeClass
size_class
            )
          ]
      )

sizeHeuristicsToPython :: [SizeHeuristic] -> PyExp
sizeHeuristicsToPython :: [SizeHeuristic] -> PyExp
sizeHeuristicsToPython = [PyExp] -> PyExp
List ([PyExp] -> PyExp)
-> ([SizeHeuristic] -> [PyExp]) -> [SizeHeuristic] -> PyExp
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (SizeHeuristic -> PyExp) -> [SizeHeuristic] -> [PyExp]
forall a b. (a -> b) -> [a] -> [b]
map SizeHeuristic -> PyExp
f
  where
    f :: SizeHeuristic -> PyExp
f (SizeHeuristic String
platform_name DeviceType
device_type WhichSize
which TPrimExp Int32 DeviceInfo
what) =
      [PyExp] -> PyExp
Tuple
        [ String -> PyExp
String String
platform_name,
          DeviceType -> PyExp
clDeviceType DeviceType
device_type,
          PyExp
which',
          PyExp
what'
        ]
      where
        clDeviceType :: DeviceType -> PyExp
clDeviceType DeviceType
DeviceGPU = String -> PyExp
Var String
"cl.device_type.GPU"
        clDeviceType DeviceType
DeviceCPU = String -> PyExp
Var String
"cl.device_type.CPU"

        which' :: PyExp
which' = case WhichSize
which of
          WhichSize
LockstepWidth -> String -> PyExp
String String
"lockstep_width"
          WhichSize
NumGroups -> String -> PyExp
String String
"num_groups"
          WhichSize
GroupSize -> String -> PyExp
String String
"group_size"
          WhichSize
TileSize -> String -> PyExp
String String
"tile_size"
          WhichSize
RegTileSize -> String -> PyExp
String String
"reg_tile_size"
          WhichSize
Threshold -> String -> PyExp
String String
"threshold"

        what' :: PyExp
what' =
          String -> PyExp -> PyExp
Lambda String
"device" (PyExp -> PyExp) -> PyExp -> PyExp
forall a b. (a -> b) -> a -> b
$
            Identity PyExp -> PyExp
forall a. Identity a -> a
runIdentity (Identity PyExp -> PyExp) -> Identity PyExp -> PyExp
forall a b. (a -> b) -> a -> b
$
              (DeviceInfo -> Identity PyExp)
-> PrimExp DeviceInfo -> Identity PyExp
forall (m :: * -> *) v.
Monad m =>
(v -> m PyExp) -> PrimExp v -> m PyExp
Py.compilePrimExp DeviceInfo -> Identity PyExp
forall (f :: * -> *). Applicative f => DeviceInfo -> f PyExp
onLeaf (PrimExp DeviceInfo -> Identity PyExp)
-> PrimExp DeviceInfo -> Identity PyExp
forall a b. (a -> b) -> a -> b
$ TPrimExp Int32 DeviceInfo -> PrimExp DeviceInfo
forall t v. TPrimExp t v -> PrimExp v
untyped TPrimExp Int32 DeviceInfo
what

        onLeaf :: DeviceInfo -> f PyExp
onLeaf (DeviceInfo String
s) =
          PyExp -> f PyExp
forall (f :: * -> *) a. Applicative f => a -> f a
pure (PyExp -> f PyExp) -> PyExp -> f PyExp
forall a b. (a -> b) -> a -> b
$
            String -> [PyExp] -> PyExp
Py.simpleCall
              String
"device.get_info"
              [String -> [PyExp] -> PyExp
Py.simpleCall String
"getattr" [String -> PyExp
Var String
"cl.device_info", String -> PyExp
String String
s]]