{-# LANGUAGE TypeFamilies #-}
module Futhark.CodeGen.ImpGen.GPU.SegRed
( compileSegRed,
compileSegRed',
DoSegBody,
)
where
import Control.Monad.Except
import Data.List (genericLength, zip7)
import Data.Maybe
import Futhark.CodeGen.ImpCode.GPU qualified as Imp
import Futhark.CodeGen.ImpGen
import Futhark.CodeGen.ImpGen.GPU.Base
import Futhark.Error
import Futhark.IR.GPUMem
import Futhark.IR.Mem.IxFun qualified as IxFun
import Futhark.Transform.Rename
import Futhark.Util (chunks)
import Futhark.Util.IntegralExp (divUp, quot, rem)
import Prelude hiding (quot, rem)
maxNumOps :: Int32
maxNumOps :: Int32
maxNumOps = Int32
10
type DoSegBody = ([(SubExp, [Imp.TExp Int64])] -> InKernelGen ()) -> InKernelGen ()
compileSegRed ::
Pat LetDecMem ->
SegLevel ->
SegSpace ->
[SegBinOp GPUMem] ->
KernelBody GPUMem ->
CallKernelGen ()
compileSegRed :: Pat LParamMem
-> SegLevel
-> SegSpace
-> [SegBinOp GPUMem]
-> KernelBody GPUMem
-> CallKernelGen ()
compileSegRed Pat LParamMem
pat SegLevel
lvl SegSpace
space [SegBinOp GPUMem]
reds KernelBody GPUMem
body = do
KernelAttrs Bool
_ Bool
_ Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size <- SegLevel -> CallKernelGen KernelAttrs
lvlKernelAttrs SegLevel
lvl
let grid :: KernelGrid
grid = Count NumGroups SubExp -> Count GroupSize SubExp -> KernelGrid
KernelGrid Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size
Pat LParamMem
-> KernelGrid
-> SegSpace
-> [SegBinOp GPUMem]
-> DoSegBody
-> CallKernelGen ()
compileSegRed' Pat LParamMem
pat KernelGrid
grid SegSpace
space [SegBinOp GPUMem]
reds forall a b. (a -> b) -> a -> b
$ \[(SubExp, [TPrimExp Int64 VName])] -> InKernelGen ()
red_cont ->
forall {k} (rep :: k) r op.
Names -> Stms rep -> ImpM rep r op () -> ImpM rep r op ()
compileStms forall a. Monoid a => a
mempty (forall {k} (rep :: k). KernelBody rep -> Stms rep
kernelBodyStms KernelBody GPUMem
body) forall a b. (a -> b) -> a -> b
$ do
let ([KernelResult]
red_res, [KernelResult]
map_res) = forall a. Int -> [a] -> ([a], [a])
splitAt (forall {k} (rep :: k). [SegBinOp rep] -> Int
segBinOpResults [SegBinOp GPUMem]
reds) forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k). KernelBody rep -> [KernelResult]
kernelBodyResult KernelBody GPUMem
body
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"save map-out results" forall a b. (a -> b) -> a -> b
$ do
let map_arrs :: [PatElem LParamMem]
map_arrs = forall a. Int -> [a] -> [a]
drop (forall {k} (rep :: k). [SegBinOp rep] -> Int
segBinOpResults [SegBinOp GPUMem]
reds) forall a b. (a -> b) -> a -> b
$ forall dec. Pat dec -> [PatElem dec]
patElems Pat LParamMem
pat
forall (m :: * -> *) a b c.
Applicative m =>
(a -> b -> m c) -> [a] -> [b] -> m ()
zipWithM_ (SegSpace -> PatElem LParamMem -> KernelResult -> InKernelGen ()
compileThreadResult SegSpace
space) [PatElem LParamMem]
map_arrs [KernelResult]
map_res
[(SubExp, [TPrimExp Int64 VName])] -> InKernelGen ()
red_cont forall a b. (a -> b) -> a -> b
$ forall a b. [a] -> [b] -> [(a, b)]
zip (forall a b. (a -> b) -> [a] -> [b]
map KernelResult -> SubExp
kernelResultSubExp [KernelResult]
red_res) forall a b. (a -> b) -> a -> b
$ forall a. a -> [a]
repeat []
compileSegRed' ::
Pat LetDecMem ->
KernelGrid ->
SegSpace ->
[SegBinOp GPUMem] ->
DoSegBody ->
CallKernelGen ()
compileSegRed' :: Pat LParamMem
-> KernelGrid
-> SegSpace
-> [SegBinOp GPUMem]
-> DoSegBody
-> CallKernelGen ()
compileSegRed' Pat LParamMem
pat KernelGrid
grid SegSpace
space [SegBinOp GPUMem]
reds DoSegBody
body
| forall i a. Num i => [a] -> i
genericLength [SegBinOp GPUMem]
reds forall a. Ord a => a -> a -> Bool
> Int32
maxNumOps =
forall a. String -> a
compilerLimitationS forall a b. (a -> b) -> a -> b
$
String
"compileSegRed': at most " forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show Int32
maxNumOps forall a. [a] -> [a] -> [a]
++ String
" reduction operators are supported."
| [(VName
_, Constant (IntValue (Int64Value Int64
1))), (VName, SubExp)
_] <- SegSpace -> [(VName, SubExp)]
unSegSpace SegSpace
space =
Pat LParamMem
-> Count NumGroups SubExp
-> Count GroupSize SubExp
-> SegSpace
-> [SegBinOp GPUMem]
-> DoSegBody
-> CallKernelGen ()
nonsegmentedReduction Pat LParamMem
pat Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size SegSpace
space [SegBinOp GPUMem]
reds DoSegBody
body
| Bool
otherwise = do
let group_size' :: TPrimExp Int64 VName
group_size' = SubExp -> TPrimExp Int64 VName
pe64 forall a b. (a -> b) -> a -> b
$ forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize SubExp
group_size
segment_size :: TPrimExp Int64 VName
segment_size = SubExp -> TPrimExp Int64 VName
pe64 forall a b. (a -> b) -> a -> b
$ forall a. [a] -> a
last forall a b. (a -> b) -> a -> b
$ SegSpace -> [SubExp]
segSpaceDims SegSpace
space
use_small_segments :: TPrimExp Bool VName
use_small_segments = TPrimExp Int64 VName
segment_size forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
2 forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<. TPrimExp Int64 VName
group_size'
forall {k} (rep :: k) r op.
TPrimExp Bool VName
-> ImpM rep r op () -> ImpM rep r op () -> ImpM rep r op ()
sIf
TPrimExp Bool VName
use_small_segments
(Pat LParamMem
-> Count NumGroups SubExp
-> Count GroupSize SubExp
-> SegSpace
-> [SegBinOp GPUMem]
-> DoSegBody
-> CallKernelGen ()
smallSegmentsReduction Pat LParamMem
pat Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size SegSpace
space [SegBinOp GPUMem]
reds DoSegBody
body)
(Pat LParamMem
-> Count NumGroups SubExp
-> Count GroupSize SubExp
-> SegSpace
-> [SegBinOp GPUMem]
-> DoSegBody
-> CallKernelGen ()
largeSegmentsReduction Pat LParamMem
pat Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size SegSpace
space [SegBinOp GPUMem]
reds DoSegBody
body)
where
num_groups :: Count NumGroups SubExp
num_groups = KernelGrid -> Count NumGroups SubExp
gridNumGroups KernelGrid
grid
group_size :: Count GroupSize SubExp
group_size = KernelGrid -> Count GroupSize SubExp
gridGroupSize KernelGrid
grid
intermediateArrays ::
Count GroupSize SubExp ->
SubExp ->
SegBinOp GPUMem ->
InKernelGen [VName]
intermediateArrays :: Count GroupSize SubExp
-> SubExp -> SegBinOp GPUMem -> InKernelGen [VName]
intermediateArrays (Count SubExp
group_size) SubExp
num_threads (SegBinOp Commutativity
_ Lambda GPUMem
red_op [SubExp]
nes Shape
_) = do
let red_op_params :: [LParam GPUMem]
red_op_params = forall {k} (rep :: k). Lambda rep -> [LParam rep]
lambdaParams Lambda GPUMem
red_op
([Param LParamMem]
red_acc_params, [Param LParamMem]
_) = forall a. Int -> [a] -> ([a], [a])
splitAt (forall (t :: * -> *) a. Foldable t => t a -> Int
length [SubExp]
nes) [LParam GPUMem]
red_op_params
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
t a -> (a -> m b) -> m (t b)
forM [Param LParamMem]
red_acc_params forall a b. (a -> b) -> a -> b
$ \Param LParamMem
p ->
case forall dec. Param dec -> dec
paramDec Param LParamMem
p of
MemArray PrimType
pt Shape
shape NoUniqueness
_ (ArrayIn VName
mem IxFun
_) -> do
let shape' :: Shape
shape' = forall d. [d] -> ShapeBase d
Shape [SubExp
num_threads] forall a. Semigroup a => a -> a -> a
<> Shape
shape
forall {k} (rep :: k) r op.
String
-> PrimType -> Shape -> VName -> IxFun -> ImpM rep r op VName
sArray String
"red_arr" PrimType
pt Shape
shape' VName
mem forall a b. (a -> b) -> a -> b
$
forall num. IntegralExp num => Shape num -> IxFun num
IxFun.iota forall a b. (a -> b) -> a -> b
$
forall a b. (a -> b) -> [a] -> [b]
map SubExp -> TPrimExp Int64 VName
pe64 forall a b. (a -> b) -> a -> b
$
forall d. ShapeBase d -> [d]
shapeDims Shape
shape'
LParamMem
_ -> do
let pt :: PrimType
pt = forall shape u. TypeBase shape u -> PrimType
elemType forall a b. (a -> b) -> a -> b
$ forall dec. Typed dec => Param dec -> Type
paramType Param LParamMem
p
shape :: Shape
shape = forall d. [d] -> ShapeBase d
Shape [SubExp
group_size]
forall {k} (rep :: k) r op.
String -> PrimType -> Shape -> Space -> ImpM rep r op VName
sAllocArray String
"red_arr" PrimType
pt Shape
shape forall a b. (a -> b) -> a -> b
$ String -> Space
Space String
"local"
groupResultArrays ::
Count NumGroups SubExp ->
Count GroupSize SubExp ->
[SegBinOp GPUMem] ->
CallKernelGen [[VName]]
groupResultArrays :: Count NumGroups SubExp
-> Count GroupSize SubExp
-> [SegBinOp GPUMem]
-> CallKernelGen [[VName]]
groupResultArrays (Count SubExp
virt_num_groups) (Count SubExp
group_size) [SegBinOp GPUMem]
reds =
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
t a -> (a -> m b) -> m (t b)
forM [SegBinOp GPUMem]
reds forall a b. (a -> b) -> a -> b
$ \(SegBinOp Commutativity
_ Lambda GPUMem
lam [SubExp]
_ Shape
shape) ->
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
t a -> (a -> m b) -> m (t b)
forM (forall {k} (rep :: k). Lambda rep -> [Type]
lambdaReturnType Lambda GPUMem
lam) forall a b. (a -> b) -> a -> b
$ \Type
t -> do
let pt :: PrimType
pt = forall shape u. TypeBase shape u -> PrimType
elemType Type
t
extra_dim :: SubExp
extra_dim
| forall shape u. TypeBase shape u -> Bool
primType Type
t, forall a. ArrayShape a => a -> Int
shapeRank Shape
shape forall a. Eq a => a -> a -> Bool
== Int
0 = IntType -> Integer -> SubExp
intConst IntType
Int64 Integer
1
| Bool
otherwise = SubExp
group_size
full_shape :: Shape
full_shape = forall d. [d] -> ShapeBase d
Shape [SubExp
extra_dim, SubExp
virt_num_groups] forall a. Semigroup a => a -> a -> a
<> Shape
shape forall a. Semigroup a => a -> a -> a
<> forall shape u. ArrayShape shape => TypeBase shape u -> shape
arrayShape Type
t
perm :: [Int]
perm = [Int
1 .. forall a. ArrayShape a => a -> Int
shapeRank Shape
full_shape forall a. Num a => a -> a -> a
- Int
1] forall a. [a] -> [a] -> [a]
++ [Int
0]
forall {k} (rep :: k) r op.
String
-> PrimType -> Shape -> Space -> [Int] -> ImpM rep r op VName
sAllocArrayPerm String
"segred_tmp" PrimType
pt Shape
full_shape (String -> Space
Space String
"device") [Int]
perm
nonsegmentedReduction ::
Pat LetDecMem ->
Count NumGroups SubExp ->
Count GroupSize SubExp ->
SegSpace ->
[SegBinOp GPUMem] ->
DoSegBody ->
CallKernelGen ()
nonsegmentedReduction :: Pat LParamMem
-> Count NumGroups SubExp
-> Count GroupSize SubExp
-> SegSpace
-> [SegBinOp GPUMem]
-> DoSegBody
-> CallKernelGen ()
nonsegmentedReduction Pat LParamMem
segred_pat Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size SegSpace
space [SegBinOp GPUMem]
reds DoSegBody
body = do
let ([VName]
gtids, [SubExp]
dims) = forall a b. [(a, b)] -> ([a], [b])
unzip forall a b. (a -> b) -> a -> b
$ SegSpace -> [(VName, SubExp)]
unSegSpace SegSpace
space
dims' :: [TPrimExp Int64 VName]
dims' = forall a b. (a -> b) -> [a] -> [b]
map SubExp -> TPrimExp Int64 VName
pe64 [SubExp]
dims
num_groups' :: Count NumGroups (TPrimExp Int64 VName)
num_groups' = forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap SubExp -> TPrimExp Int64 VName
pe64 Count NumGroups SubExp
num_groups
group_size' :: Count GroupSize (TPrimExp Int64 VName)
group_size' = forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap SubExp -> TPrimExp Int64 VName
pe64 Count GroupSize SubExp
group_size
global_tid :: TPrimExp Int64 VName
global_tid = forall a. a -> TPrimExp Int64 a
Imp.le64 forall a b. (a -> b) -> a -> b
$ SegSpace -> VName
segFlat SegSpace
space
w :: TPrimExp Int64 VName
w = forall a. [a] -> a
last [TPrimExp Int64 VName]
dims'
VName
counter <-
forall {k} (rep :: k) r op.
String -> Space -> PrimType -> ArrayContents -> ImpM rep r op VName
sStaticArray String
"counter" (String -> Space
Space String
"device") PrimType
int32 forall a b. (a -> b) -> a -> b
$
Int -> ArrayContents
Imp.ArrayZeros (forall a b. (Integral a, Num b) => a -> b
fromIntegral Int32
maxNumOps)
[[VName]]
reds_group_res_arrs <- Count NumGroups SubExp
-> Count GroupSize SubExp
-> [SegBinOp GPUMem]
-> CallKernelGen [[VName]]
groupResultArrays Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size [SegBinOp GPUMem]
reds
TV Int64
num_threads <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TV t)
dPrimV String
"num_threads" forall a b. (a -> b) -> a -> b
$
forall {k} (u :: k) e. Count u e -> e
unCount Count NumGroups (TPrimExp Int64 VName)
num_groups' forall a. Num a => a -> a -> a
* forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize (TPrimExp Int64 VName)
group_size'
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"\n# SegRed" forall a. Maybe a
Nothing
String
-> VName -> KernelAttrs -> InKernelGen () -> CallKernelGen ()
sKernelThread String
"segred_nonseg" (SegSpace -> VName
segFlat SegSpace
space) (Count NumGroups SubExp -> Count GroupSize SubExp -> KernelAttrs
defKernelAttrs Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size) forall a b. (a -> b) -> a -> b
$ do
KernelConstants
constants <- KernelEnv -> KernelConstants
kernelConstants forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall {k} (rep :: k) r op. ImpM rep r op r
askEnv
VName
sync_arr <- forall {k} (rep :: k) r op.
String -> PrimType -> Shape -> Space -> ImpM rep r op VName
sAllocArray String
"sync_arr" PrimType
Bool (forall d. [d] -> ShapeBase d
Shape [IntType -> Integer -> SubExp
intConst IntType
Int32 Integer
1]) forall a b. (a -> b) -> a -> b
$ String -> Space
Space String
"local"
[[VName]]
reds_arrs <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (Count GroupSize SubExp
-> SubExp -> SegBinOp GPUMem -> InKernelGen [VName]
intermediateArrays Count GroupSize SubExp
group_size (forall {k} (t :: k). TV t -> SubExp
tvSize TV Int64
num_threads)) [SegBinOp GPUMem]
reds
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ [VName]
gtids forall a b. (a -> b) -> a -> b
$ \VName
v -> forall {k1} {k2} (t :: k1) (rep :: k2) r op.
VName -> TExp t -> ImpM rep r op ()
dPrimV_ VName
v (TPrimExp Int64 VName
0 :: Imp.TExp Int64)
let num_elements :: Count Elements (TPrimExp Int64 VName)
num_elements = forall a. a -> Count Elements a
Imp.elements TPrimExp Int64 VName
w
elems_per_thread :: Count Elements (TPrimExp Int64 VName)
elems_per_thread =
Count Elements (TPrimExp Int64 VName)
num_elements
forall e. IntegralExp e => e -> e -> e
`divUp` forall a. a -> Count Elements a
Imp.elements (forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 (KernelConstants -> TPrimExp Int32 VName
kernelNumThreads KernelConstants
constants))
[SegBinOpSlug]
slugs <-
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (TPrimExp Int32 VName
-> TPrimExp Int32 VName
-> (SegBinOp GPUMem, [VName], [VName])
-> InKernelGen SegBinOpSlug
segBinOpSlug (KernelConstants -> TPrimExp Int32 VName
kernelLocalThreadId KernelConstants
constants) (KernelConstants -> TPrimExp Int32 VName
kernelGroupId KernelConstants
constants)) forall a b. (a -> b) -> a -> b
$
forall a b c. [a] -> [b] -> [c] -> [(a, b, c)]
zip3 [SegBinOp GPUMem]
reds [[VName]]
reds_arrs [[VName]]
reds_group_res_arrs
[Lambda GPUMem]
reds_op_renamed <-
KernelConstants
-> [(VName, TPrimExp Int64 VName)]
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> [SegBinOpSlug]
-> DoSegBody
-> InKernelGen [Lambda GPUMem]
reductionStageOne
KernelConstants
constants
(forall a b. [a] -> [b] -> [(a, b)]
zip [VName]
gtids [TPrimExp Int64 VName]
dims')
Count Elements (TPrimExp Int64 VName)
num_elements
TPrimExp Int64 VName
global_tid
Count Elements (TPrimExp Int64 VName)
elems_per_thread
(forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
num_threads)
[SegBinOpSlug]
slugs
DoSegBody
body
let segred_pes :: [[PatElem LParamMem]]
segred_pes =
forall a. [Int] -> [a] -> [[a]]
chunks (forall a b. (a -> b) -> [a] -> [b]
map (forall (t :: * -> *) a. Foldable t => t a -> Int
length forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall {k} (rep :: k). SegBinOp rep -> [SubExp]
segBinOpNeutral) [SegBinOp GPUMem]
reds) forall a b. (a -> b) -> a -> b
$
forall dec. Pat dec -> [PatElem dec]
patElems Pat LParamMem
segred_pat
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b c d e f g.
[a]
-> [b]
-> [c]
-> [d]
-> [e]
-> [f]
-> [g]
-> [(a, b, c, d, e, f, g)]
zip7 [SegBinOp GPUMem]
reds [[VName]]
reds_arrs [[VName]]
reds_group_res_arrs [[PatElem LParamMem]]
segred_pes [SegBinOpSlug]
slugs [Lambda GPUMem]
reds_op_renamed [Integer
0 ..]) forall a b. (a -> b) -> a -> b
$
\(SegBinOp Commutativity
_ Lambda GPUMem
red_op [SubExp]
nes Shape
_, [VName]
red_arrs, [VName]
group_res_arrs, [PatElem LParamMem]
pes, SegBinOpSlug
slug, Lambda GPUMem
red_op_renamed, Integer
i) -> do
let ([Param LParamMem]
red_x_params, [Param LParamMem]
red_y_params) = forall a. Int -> [a] -> ([a], [a])
splitAt (forall (t :: * -> *) a. Foldable t => t a -> Int
length [SubExp]
nes) forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k). Lambda rep -> [LParam rep]
lambdaParams Lambda GPUMem
red_op
KernelConstants
-> [PatElem LParamMem]
-> TPrimExp Int32 VName
-> TPrimExp Int32 VName
-> [TPrimExp Int64 VName]
-> TPrimExp Int64 VName
-> TPrimExp Int64 VName
-> SegBinOpSlug
-> [LParam GPUMem]
-> [LParam GPUMem]
-> Lambda GPUMem
-> [SubExp]
-> TPrimExp Int32 VName
-> VName
-> TPrimExp Int32 VName
-> VName
-> [VName]
-> [VName]
-> InKernelGen ()
reductionStageTwo
KernelConstants
constants
[PatElem LParamMem]
pes
(KernelConstants -> TPrimExp Int32 VName
kernelGroupId KernelConstants
constants)
TPrimExp Int32 VName
0
[TPrimExp Int64 VName
0]
TPrimExp Int64 VName
0
(forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 forall a b. (a -> b) -> a -> b
$ KernelConstants -> TPrimExp Int64 VName
kernelNumGroups KernelConstants
constants)
SegBinOpSlug
slug
[Param LParamMem]
red_x_params
[Param LParamMem]
red_y_params
Lambda GPUMem
red_op_renamed
[SubExp]
nes
TPrimExp Int32 VName
1
VName
counter
(forall a. Num a => Integer -> a
fromInteger Integer
i)
VName
sync_arr
[VName]
group_res_arrs
[VName]
red_arrs
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"" forall a. Maybe a
Nothing
smallSegmentsReduction ::
Pat LetDecMem ->
Count NumGroups SubExp ->
Count GroupSize SubExp ->
SegSpace ->
[SegBinOp GPUMem] ->
DoSegBody ->
CallKernelGen ()
smallSegmentsReduction :: Pat LParamMem
-> Count NumGroups SubExp
-> Count GroupSize SubExp
-> SegSpace
-> [SegBinOp GPUMem]
-> DoSegBody
-> CallKernelGen ()
smallSegmentsReduction (Pat [PatElem LParamMem]
segred_pes) Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size SegSpace
space [SegBinOp GPUMem]
reds DoSegBody
body = do
let ([VName]
gtids, [SubExp]
dims) = forall a b. [(a, b)] -> ([a], [b])
unzip forall a b. (a -> b) -> a -> b
$ SegSpace -> [(VName, SubExp)]
unSegSpace SegSpace
space
dims' :: [TPrimExp Int64 VName]
dims' = forall a b. (a -> b) -> [a] -> [b]
map SubExp -> TPrimExp Int64 VName
pe64 [SubExp]
dims
segment_size :: TPrimExp Int64 VName
segment_size = forall a. [a] -> a
last [TPrimExp Int64 VName]
dims'
TPrimExp Int64 VName
segment_size_nonzero <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TExp t)
dPrimVE String
"segment_size_nonzero" forall a b. (a -> b) -> a -> b
$ forall v. TPrimExp Int64 v -> TPrimExp Int64 v -> TPrimExp Int64 v
sMax64 TPrimExp Int64 VName
1 TPrimExp Int64 VName
segment_size
let num_groups' :: Count NumGroups (TPrimExp Int64 VName)
num_groups' = forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap SubExp -> TPrimExp Int64 VName
pe64 Count NumGroups SubExp
num_groups
group_size' :: Count GroupSize (TPrimExp Int64 VName)
group_size' = forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap SubExp -> TPrimExp Int64 VName
pe64 Count GroupSize SubExp
group_size
TV Int64
num_threads <- forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TV t)
dPrimV String
"num_threads" forall a b. (a -> b) -> a -> b
$ forall {k} (u :: k) e. Count u e -> e
unCount Count NumGroups (TPrimExp Int64 VName)
num_groups' forall a. Num a => a -> a -> a
* forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize (TPrimExp Int64 VName)
group_size'
let num_segments :: TPrimExp Int64 VName
num_segments = forall (t :: * -> *) a. (Foldable t, Num a) => t a -> a
product forall a b. (a -> b) -> a -> b
$ forall a. [a] -> [a]
init [TPrimExp Int64 VName]
dims'
segments_per_group :: TPrimExp Int64 VName
segments_per_group = forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize (TPrimExp Int64 VName)
group_size' forall e. IntegralExp e => e -> e -> e
`quot` TPrimExp Int64 VName
segment_size_nonzero
required_groups :: TPrimExp Int32 VName
required_groups = forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int32 v
sExt32 forall a b. (a -> b) -> a -> b
$ TPrimExp Int64 VName
num_segments forall e. IntegralExp e => e -> e -> e
`divUp` TPrimExp Int64 VName
segments_per_group
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"\n# SegRed-small" forall a. Maybe a
Nothing
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"num_segments" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped TPrimExp Int64 VName
num_segments
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"segment_size" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped TPrimExp Int64 VName
segment_size
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"segments_per_group" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped TPrimExp Int64 VName
segments_per_group
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"required_groups" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped TPrimExp Int32 VName
required_groups
String
-> VName -> KernelAttrs -> InKernelGen () -> CallKernelGen ()
sKernelThread String
"segred_small" (SegSpace -> VName
segFlat SegSpace
space) (Count NumGroups SubExp -> Count GroupSize SubExp -> KernelAttrs
defKernelAttrs Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size) forall a b. (a -> b) -> a -> b
$ do
KernelConstants
constants <- KernelEnv -> KernelConstants
kernelConstants forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall {k} (rep :: k) r op. ImpM rep r op r
askEnv
[[VName]]
reds_arrs <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (Count GroupSize SubExp
-> SubExp -> SegBinOp GPUMem -> InKernelGen [VName]
intermediateArrays Count GroupSize SubExp
group_size (VName -> SubExp
Var forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k). TV t -> VName
tvVar TV Int64
num_threads)) [SegBinOp GPUMem]
reds
SegVirt
-> TPrimExp Int32 VName
-> (TPrimExp Int32 VName -> InKernelGen ())
-> InKernelGen ()
virtualiseGroups SegVirt
SegVirt TPrimExp Int32 VName
required_groups forall a b. (a -> b) -> a -> b
$ \TPrimExp Int32 VName
group_id' -> do
let ltid :: TPrimExp Int64 VName
ltid = forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 forall a b. (a -> b) -> a -> b
$ KernelConstants -> TPrimExp Int32 VName
kernelLocalThreadId KernelConstants
constants
segment_index :: TPrimExp Int64 VName
segment_index =
(TPrimExp Int64 VName
ltid forall e. IntegralExp e => e -> e -> e
`quot` TPrimExp Int64 VName
segment_size_nonzero)
forall a. Num a => a -> a -> a
+ (forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
group_id' forall a. Num a => a -> a -> a
* forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int64 VName
segments_per_group)
index_within_segment :: TPrimExp Int64 VName
index_within_segment = TPrimExp Int64 VName
ltid forall e. IntegralExp e => e -> e -> e
`rem` TPrimExp Int64 VName
segment_size
forall {k} (rep :: k) r op.
[(VName, TPrimExp Int64 VName)]
-> TPrimExp Int64 VName -> ImpM rep r op ()
dIndexSpace (forall a b. [a] -> [b] -> [(a, b)]
zip (forall a. [a] -> [a]
init [VName]
gtids) (forall a. [a] -> [a]
init [TPrimExp Int64 VName]
dims')) TPrimExp Int64 VName
segment_index
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
VName -> TExp t -> ImpM rep r op ()
dPrimV_ (forall a. [a] -> a
last [VName]
gtids) TPrimExp Int64 VName
index_within_segment
let out_of_bounds :: InKernelGen ()
out_of_bounds =
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [SegBinOp GPUMem]
reds [[VName]]
reds_arrs) forall a b. (a -> b) -> a -> b
$ \(SegBinOp Commutativity
_ Lambda GPUMem
_ [SubExp]
nes Shape
_, [VName]
red_arrs) ->
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [VName]
red_arrs [SubExp]
nes) forall a b. (a -> b) -> a -> b
$ \(VName
arr, SubExp
ne) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
arr [TPrimExp Int64 VName
ltid] SubExp
ne []
in_bounds :: InKernelGen ()
in_bounds =
DoSegBody
body forall a b. (a -> b) -> a -> b
$ \[(SubExp, [TPrimExp Int64 VName])]
red_res ->
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"save results to be reduced" forall a b. (a -> b) -> a -> b
$ do
let red_dests :: [(VName, [TPrimExp Int64 VName])]
red_dests = forall a b. [a] -> [b] -> [(a, b)]
zip (forall (t :: * -> *) a. Foldable t => t [a] -> [a]
concat [[VName]]
reds_arrs) forall a b. (a -> b) -> a -> b
$ forall a. a -> [a]
repeat [TPrimExp Int64 VName
ltid]
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [(VName, [TPrimExp Int64 VName])]
red_dests [(SubExp, [TPrimExp Int64 VName])]
red_res) forall a b. (a -> b) -> a -> b
$ \((VName
d, [TPrimExp Int64 VName]
d_is), (SubExp
res, [TPrimExp Int64 VName]
res_is)) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
d [TPrimExp Int64 VName]
d_is SubExp
res [TPrimExp Int64 VName]
res_is
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"apply map function if in bounds" forall a b. (a -> b) -> a -> b
$
forall {k} (rep :: k) r op.
TPrimExp Bool VName
-> ImpM rep r op () -> ImpM rep r op () -> ImpM rep r op ()
sIf
( TPrimExp Int64 VName
segment_size
forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.>. TPrimExp Int64 VName
0
forall v. TPrimExp Bool v -> TPrimExp Bool v -> TPrimExp Bool v
.&&. [(VName, SubExp)] -> TPrimExp Bool VName
isActive (forall a. [a] -> [a]
init forall a b. (a -> b) -> a -> b
$ forall a b. [a] -> [b] -> [(a, b)]
zip [VName]
gtids [SubExp]
dims)
forall v. TPrimExp Bool v -> TPrimExp Bool v -> TPrimExp Bool v
.&&. TPrimExp Int64 VName
ltid
forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<. TPrimExp Int64 VName
segment_size
forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
segments_per_group
)
InKernelGen ()
in_bounds
InKernelGen ()
out_of_bounds
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$ Fence -> KernelOp
Imp.ErrorSync Fence
Imp.FenceLocal
let crossesSegment :: TPrimExp Int32 VName -> TPrimExp Int32 VName -> TPrimExp Bool VName
crossesSegment TPrimExp Int32 VName
from TPrimExp Int32 VName
to =
(forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
to forall a. Num a => a -> a -> a
- forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
from) forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.>. (forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
to forall e. IntegralExp e => e -> e -> e
`rem` TPrimExp Int64 VName
segment_size)
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (TPrimExp Int64 VName
segment_size forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.>. TPrimExp Int64 VName
0) forall a b. (a -> b) -> a -> b
$
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"perform segmented scan to imitate reduction" forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [SegBinOp GPUMem]
reds [[VName]]
reds_arrs) forall a b. (a -> b) -> a -> b
$ \(SegBinOp Commutativity
_ Lambda GPUMem
red_op [SubExp]
_ Shape
_, [VName]
red_arrs) ->
Maybe
(TPrimExp Int32 VName
-> TPrimExp Int32 VName -> TPrimExp Bool VName)
-> TPrimExp Int64 VName
-> TPrimExp Int64 VName
-> Lambda GPUMem
-> [VName]
-> InKernelGen ()
groupScan
(forall a. a -> Maybe a
Just TPrimExp Int32 VName -> TPrimExp Int32 VName -> TPrimExp Bool VName
crossesSegment)
(forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
num_threads)
(TPrimExp Int64 VName
segment_size forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
segments_per_group)
Lambda GPUMem
red_op
[VName]
red_arrs
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$ Fence -> KernelOp
Imp.Barrier Fence
Imp.FenceLocal
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"save final values of segments"
forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen
( forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
group_id'
forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
segments_per_group
forall a. Num a => a -> a -> a
+ forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int64 VName
ltid
forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<. TPrimExp Int64 VName
num_segments
forall v. TPrimExp Bool v -> TPrimExp Bool v -> TPrimExp Bool v
.&&. TPrimExp Int64 VName
ltid
forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<. TPrimExp Int64 VName
segments_per_group
)
forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [PatElem LParamMem]
segred_pes (forall (t :: * -> *) a. Foldable t => t [a] -> [a]
concat [[VName]]
reds_arrs))
forall a b. (a -> b) -> a -> b
$ \(PatElem LParamMem
pe, VName
arr) -> do
let flat_segment_index :: TPrimExp Int64 VName
flat_segment_index =
forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
group_id' forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
segments_per_group forall a. Num a => a -> a -> a
+ forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int64 VName
ltid
gtids' :: [TPrimExp Int64 VName]
gtids' =
forall num. IntegralExp num => [num] -> num -> [num]
unflattenIndex (forall a. [a] -> [a]
init [TPrimExp Int64 VName]
dims') TPrimExp Int64 VName
flat_segment_index
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix
(forall dec. PatElem dec -> VName
patElemName PatElem LParamMem
pe)
[TPrimExp Int64 VName]
gtids'
(VName -> SubExp
Var VName
arr)
[(TPrimExp Int64 VName
ltid forall a. Num a => a -> a -> a
+ TPrimExp Int64 VName
1) forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
segment_size_nonzero forall a. Num a => a -> a -> a
- TPrimExp Int64 VName
1]
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$ Fence -> KernelOp
Imp.Barrier Fence
Imp.FenceLocal
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"" forall a. Maybe a
Nothing
largeSegmentsReduction ::
Pat LetDecMem ->
Count NumGroups SubExp ->
Count GroupSize SubExp ->
SegSpace ->
[SegBinOp GPUMem] ->
DoSegBody ->
CallKernelGen ()
largeSegmentsReduction :: Pat LParamMem
-> Count NumGroups SubExp
-> Count GroupSize SubExp
-> SegSpace
-> [SegBinOp GPUMem]
-> DoSegBody
-> CallKernelGen ()
largeSegmentsReduction Pat LParamMem
segred_pat Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size SegSpace
space [SegBinOp GPUMem]
reds DoSegBody
body = do
let ([VName]
gtids, [SubExp]
dims) = forall a b. [(a, b)] -> ([a], [b])
unzip forall a b. (a -> b) -> a -> b
$ SegSpace -> [(VName, SubExp)]
unSegSpace SegSpace
space
dims' :: [TPrimExp Int64 VName]
dims' = forall a b. (a -> b) -> [a] -> [b]
map SubExp -> TPrimExp Int64 VName
pe64 [SubExp]
dims
num_segments :: TPrimExp Int64 VName
num_segments = forall (t :: * -> *) a. (Foldable t, Num a) => t a -> a
product forall a b. (a -> b) -> a -> b
$ forall a. [a] -> [a]
init [TPrimExp Int64 VName]
dims'
segment_size :: TPrimExp Int64 VName
segment_size = forall a. [a] -> a
last [TPrimExp Int64 VName]
dims'
num_groups' :: Count NumGroups (TPrimExp Int64 VName)
num_groups' = forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap SubExp -> TPrimExp Int64 VName
pe64 Count NumGroups SubExp
num_groups
group_size' :: Count GroupSize (TPrimExp Int64 VName)
group_size' = forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
fmap SubExp -> TPrimExp Int64 VName
pe64 Count GroupSize SubExp
group_size
(TPrimExp Int64 VName
groups_per_segment, Count Elements (TPrimExp Int64 VName)
elems_per_thread) <-
TPrimExp Int64 VName
-> TPrimExp Int64 VName
-> Count NumGroups (TPrimExp Int64 VName)
-> Count GroupSize (TPrimExp Int64 VName)
-> CallKernelGen
(TPrimExp Int64 VName, Count Elements (TPrimExp Int64 VName))
groupsPerSegmentAndElementsPerThread
TPrimExp Int64 VName
segment_size
TPrimExp Int64 VName
num_segments
Count NumGroups (TPrimExp Int64 VName)
num_groups'
Count GroupSize (TPrimExp Int64 VName)
group_size'
TV Int64
virt_num_groups <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TV t)
dPrimV String
"virt_num_groups" forall a b. (a -> b) -> a -> b
$
TPrimExp Int64 VName
groups_per_segment forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
num_segments
TV Int64
num_threads <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TV t)
dPrimV String
"num_threads" forall a b. (a -> b) -> a -> b
$
forall {k} (u :: k) e. Count u e -> e
unCount Count NumGroups (TPrimExp Int64 VName)
num_groups' forall a. Num a => a -> a -> a
* forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize (TPrimExp Int64 VName)
group_size'
TV Int64
threads_per_segment <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TV t)
dPrimV String
"threads_per_segment" forall a b. (a -> b) -> a -> b
$
TPrimExp Int64 VName
groups_per_segment forall a. Num a => a -> a -> a
* forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize (TPrimExp Int64 VName)
group_size'
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"\n# SegRed-large" forall a. Maybe a
Nothing
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"num_segments" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped TPrimExp Int64 VName
num_segments
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"segment_size" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped TPrimExp Int64 VName
segment_size
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"virt_num_groups" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
virt_num_groups
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"num_groups" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped forall a b. (a -> b) -> a -> b
$ forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count NumGroups (TPrimExp Int64 VName)
num_groups'
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"group_size" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped forall a b. (a -> b) -> a -> b
$ forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count GroupSize (TPrimExp Int64 VName)
group_size'
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"elems_per_thread" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped forall a b. (a -> b) -> a -> b
$ forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
elems_per_thread
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"groups_per_segment" forall a b. (a -> b) -> a -> b
$ forall a. a -> Maybe a
Just forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped TPrimExp Int64 VName
groups_per_segment
[[VName]]
reds_group_res_arrs <- Count NumGroups SubExp
-> Count GroupSize SubExp
-> [SegBinOp GPUMem]
-> CallKernelGen [[VName]]
groupResultArrays (forall {k} (u :: k) e. e -> Count u e
Count (forall {k} (t :: k). TV t -> SubExp
tvSize TV Int64
virt_num_groups)) Count GroupSize SubExp
group_size [SegBinOp GPUMem]
reds
let num_counters :: Int
num_counters = forall a b. (Integral a, Num b) => a -> b
fromIntegral Int32
maxNumOps forall a. Num a => a -> a -> a
* Int
1024
VName
counter <-
forall {k} (rep :: k) r op.
String -> Space -> PrimType -> ArrayContents -> ImpM rep r op VName
sStaticArray String
"counter" (String -> Space
Space String
"device") PrimType
int32 forall a b. (a -> b) -> a -> b
$
Int -> ArrayContents
Imp.ArrayZeros Int
num_counters
String
-> VName -> KernelAttrs -> InKernelGen () -> CallKernelGen ()
sKernelThread String
"segred_large" (SegSpace -> VName
segFlat SegSpace
space) (Count NumGroups SubExp -> Count GroupSize SubExp -> KernelAttrs
defKernelAttrs Count NumGroups SubExp
num_groups Count GroupSize SubExp
group_size) forall a b. (a -> b) -> a -> b
$ do
KernelConstants
constants <- KernelEnv -> KernelConstants
kernelConstants forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall {k} (rep :: k) r op. ImpM rep r op r
askEnv
[[VName]]
reds_arrs <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (Count GroupSize SubExp
-> SubExp -> SegBinOp GPUMem -> InKernelGen [VName]
intermediateArrays Count GroupSize SubExp
group_size (forall {k} (t :: k). TV t -> SubExp
tvSize TV Int64
num_threads)) [SegBinOp GPUMem]
reds
VName
sync_arr <- forall {k} (rep :: k) r op.
String -> PrimType -> Shape -> Space -> ImpM rep r op VName
sAllocArray String
"sync_arr" PrimType
Bool (forall d. [d] -> ShapeBase d
Shape [IntType -> Integer -> SubExp
intConst IntType
Int32 Integer
1]) forall a b. (a -> b) -> a -> b
$ String -> Space
Space String
"local"
SegVirt
-> TPrimExp Int32 VName
-> (TPrimExp Int32 VName -> InKernelGen ())
-> InKernelGen ()
virtualiseGroups SegVirt
SegVirt (forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int32 v
sExt32 (forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
virt_num_groups)) forall a b. (a -> b) -> a -> b
$ \TPrimExp Int32 VName
group_id -> do
let segment_gtids :: [VName]
segment_gtids = forall a. [a] -> [a]
init [VName]
gtids
w :: SubExp
w = forall a. [a] -> a
last [SubExp]
dims
local_tid :: TPrimExp Int32 VName
local_tid = KernelConstants -> TPrimExp Int32 VName
kernelLocalThreadId KernelConstants
constants
TPrimExp Int32 VName
flat_segment_id <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TExp t)
dPrimVE String
"flat_segment_id" forall a b. (a -> b) -> a -> b
$
TPrimExp Int32 VName
group_id forall e. IntegralExp e => e -> e -> e
`quot` forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int32 v
sExt32 TPrimExp Int64 VName
groups_per_segment
TPrimExp Int64 VName
global_tid <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TExp t)
dPrimVE String
"global_tid" forall a b. (a -> b) -> a -> b
$
(forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
group_id forall a. Num a => a -> a -> a
* forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 (forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize (TPrimExp Int64 VName)
group_size') forall a. Num a => a -> a -> a
+ forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
local_tid)
forall e. IntegralExp e => e -> e -> e
`rem` (forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 (forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize (TPrimExp Int64 VName)
group_size') forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
groups_per_segment)
let first_group_for_segment :: TPrimExp Int64 VName
first_group_for_segment = forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
flat_segment_id forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
groups_per_segment
forall {k} (rep :: k) r op.
[(VName, TPrimExp Int64 VName)]
-> TPrimExp Int64 VName -> ImpM rep r op ()
dIndexSpace (forall a b. [a] -> [b] -> [(a, b)]
zip [VName]
segment_gtids (forall a. [a] -> [a]
init [TPrimExp Int64 VName]
dims')) forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
flat_segment_id
forall {k} (rep :: k) r op. VName -> PrimType -> ImpM rep r op ()
dPrim_ (forall a. [a] -> a
last [VName]
gtids) PrimType
int64
let num_elements :: Count Elements (TPrimExp Int64 VName)
num_elements = forall a. a -> Count Elements a
Imp.elements forall a b. (a -> b) -> a -> b
$ SubExp -> TPrimExp Int64 VName
pe64 SubExp
w
[SegBinOpSlug]
slugs <-
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (TPrimExp Int32 VName
-> TPrimExp Int32 VName
-> (SegBinOp GPUMem, [VName], [VName])
-> InKernelGen SegBinOpSlug
segBinOpSlug TPrimExp Int32 VName
local_tid TPrimExp Int32 VName
group_id) forall a b. (a -> b) -> a -> b
$
forall a b c. [a] -> [b] -> [c] -> [(a, b, c)]
zip3 [SegBinOp GPUMem]
reds [[VName]]
reds_arrs [[VName]]
reds_group_res_arrs
[Lambda GPUMem]
reds_op_renamed <-
KernelConstants
-> [(VName, TPrimExp Int64 VName)]
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> [SegBinOpSlug]
-> DoSegBody
-> InKernelGen [Lambda GPUMem]
reductionStageOne
KernelConstants
constants
(forall a b. [a] -> [b] -> [(a, b)]
zip [VName]
gtids [TPrimExp Int64 VName]
dims')
Count Elements (TPrimExp Int64 VName)
num_elements
TPrimExp Int64 VName
global_tid
Count Elements (TPrimExp Int64 VName)
elems_per_thread
(forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
threads_per_segment)
[SegBinOpSlug]
slugs
DoSegBody
body
let segred_pes :: [[PatElem LParamMem]]
segred_pes =
forall a. [Int] -> [a] -> [[a]]
chunks (forall a b. (a -> b) -> [a] -> [b]
map (forall (t :: * -> *) a. Foldable t => t a -> Int
length forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall {k} (rep :: k). SegBinOp rep -> [SubExp]
segBinOpNeutral) [SegBinOp GPUMem]
reds) forall a b. (a -> b) -> a -> b
$
forall dec. Pat dec -> [PatElem dec]
patElems Pat LParamMem
segred_pat
multiple_groups_per_segment :: InKernelGen ()
multiple_groups_per_segment =
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b c d e f g.
[a]
-> [b]
-> [c]
-> [d]
-> [e]
-> [f]
-> [g]
-> [(a, b, c, d, e, f, g)]
zip7 [SegBinOp GPUMem]
reds [[VName]]
reds_arrs [[VName]]
reds_group_res_arrs [[PatElem LParamMem]]
segred_pes [SegBinOpSlug]
slugs [Lambda GPUMem]
reds_op_renamed [Integer
0 ..]) forall a b. (a -> b) -> a -> b
$
\(SegBinOp Commutativity
_ Lambda GPUMem
red_op [SubExp]
nes Shape
_, [VName]
red_arrs, [VName]
group_res_arrs, [PatElem LParamMem]
pes, SegBinOpSlug
slug, Lambda GPUMem
red_op_renamed, Integer
i) -> do
let ([Param LParamMem]
red_x_params, [Param LParamMem]
red_y_params) =
forall a. Int -> [a] -> ([a], [a])
splitAt (forall (t :: * -> *) a. Foldable t => t a -> Int
length [SubExp]
nes) forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k). Lambda rep -> [LParam rep]
lambdaParams Lambda GPUMem
red_op
KernelConstants
-> [PatElem LParamMem]
-> TPrimExp Int32 VName
-> TPrimExp Int32 VName
-> [TPrimExp Int64 VName]
-> TPrimExp Int64 VName
-> TPrimExp Int64 VName
-> SegBinOpSlug
-> [LParam GPUMem]
-> [LParam GPUMem]
-> Lambda GPUMem
-> [SubExp]
-> TPrimExp Int32 VName
-> VName
-> TPrimExp Int32 VName
-> VName
-> [VName]
-> [VName]
-> InKernelGen ()
reductionStageTwo
KernelConstants
constants
[PatElem LParamMem]
pes
TPrimExp Int32 VName
group_id
TPrimExp Int32 VName
flat_segment_id
(forall a b. (a -> b) -> [a] -> [b]
map forall a. a -> TPrimExp Int64 a
Imp.le64 [VName]
segment_gtids)
(forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int64 VName
first_group_for_segment)
TPrimExp Int64 VName
groups_per_segment
SegBinOpSlug
slug
[Param LParamMem]
red_x_params
[Param LParamMem]
red_y_params
Lambda GPUMem
red_op_renamed
[SubExp]
nes
(forall a b. (Integral a, Num b) => a -> b
fromIntegral Int
num_counters)
VName
counter
(forall a. Num a => Integer -> a
fromInteger Integer
i)
VName
sync_arr
[VName]
group_res_arrs
[VName]
red_arrs
one_group_per_segment :: InKernelGen ()
one_group_per_segment =
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
comment Text
"first thread in group saves final result to memory" forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [SegBinOpSlug]
slugs [[PatElem LParamMem]]
segred_pes) forall a b. (a -> b) -> a -> b
$ \(SegBinOpSlug
slug, [PatElem LParamMem]
pes) ->
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (TPrimExp Int32 VName
local_tid forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.==. TPrimExp Int32 VName
0) forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [PatElem LParamMem]
pes (SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ \(PatElem LParamMem
v, (VName
acc, [TPrimExp Int64 VName]
acc_is)) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix (forall dec. PatElem dec -> VName
patElemName PatElem LParamMem
v) (forall a b. (a -> b) -> [a] -> [b]
map forall a. a -> TPrimExp Int64 a
Imp.le64 [VName]
segment_gtids) (VName -> SubExp
Var VName
acc) [TPrimExp Int64 VName]
acc_is
forall {k} (rep :: k) r op.
TPrimExp Bool VName
-> ImpM rep r op () -> ImpM rep r op () -> ImpM rep r op ()
sIf (TPrimExp Int64 VName
groups_per_segment forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.==. TPrimExp Int64 VName
1) InKernelGen ()
one_group_per_segment InKernelGen ()
multiple_groups_per_segment
forall {k} op (rep :: k) r. Code op -> ImpM rep r op ()
emit forall a b. (a -> b) -> a -> b
$ forall a. String -> Maybe Exp -> Code a
Imp.DebugPrint String
"" forall a. Maybe a
Nothing
groupsPerSegmentAndElementsPerThread ::
Imp.TExp Int64 ->
Imp.TExp Int64 ->
Count NumGroups (Imp.TExp Int64) ->
Count GroupSize (Imp.TExp Int64) ->
CallKernelGen
( Imp.TExp Int64,
Imp.Count Imp.Elements (Imp.TExp Int64)
)
groupsPerSegmentAndElementsPerThread :: TPrimExp Int64 VName
-> TPrimExp Int64 VName
-> Count NumGroups (TPrimExp Int64 VName)
-> Count GroupSize (TPrimExp Int64 VName)
-> CallKernelGen
(TPrimExp Int64 VName, Count Elements (TPrimExp Int64 VName))
groupsPerSegmentAndElementsPerThread TPrimExp Int64 VName
segment_size TPrimExp Int64 VName
num_segments Count NumGroups (TPrimExp Int64 VName)
num_groups_hint Count GroupSize (TPrimExp Int64 VName)
group_size = do
TPrimExp Int64 VName
groups_per_segment <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TExp t)
dPrimVE String
"groups_per_segment" forall a b. (a -> b) -> a -> b
$
forall {k} (u :: k) e. Count u e -> e
unCount Count NumGroups (TPrimExp Int64 VName)
num_groups_hint forall e. IntegralExp e => e -> e -> e
`divUp` forall v. TPrimExp Int64 v -> TPrimExp Int64 v -> TPrimExp Int64 v
sMax64 TPrimExp Int64 VName
1 TPrimExp Int64 VName
num_segments
TPrimExp Int64 VName
elements_per_thread <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TExp t)
dPrimVE String
"elements_per_thread" forall a b. (a -> b) -> a -> b
$
TPrimExp Int64 VName
segment_size forall e. IntegralExp e => e -> e -> e
`divUp` (forall {k} (u :: k) e. Count u e -> e
unCount Count GroupSize (TPrimExp Int64 VName)
group_size forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
groups_per_segment)
forall (f :: * -> *) a. Applicative f => a -> f a
pure (TPrimExp Int64 VName
groups_per_segment, forall a. a -> Count Elements a
Imp.elements TPrimExp Int64 VName
elements_per_thread)
data SegBinOpSlug = SegBinOpSlug
{ SegBinOpSlug -> SegBinOp GPUMem
slugOp :: SegBinOp GPUMem,
SegBinOpSlug -> [VName]
slugArrs :: [VName],
SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs :: [(VName, [Imp.TExp Int64])]
}
slugBody :: SegBinOpSlug -> Body GPUMem
slugBody :: SegBinOpSlug -> Body GPUMem
slugBody = forall {k} (rep :: k). Lambda rep -> Body rep
lambdaBody forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall {k} (rep :: k). SegBinOp rep -> Lambda rep
segBinOpLambda forall b c a. (b -> c) -> (a -> b) -> a -> c
. SegBinOpSlug -> SegBinOp GPUMem
slugOp
slugParams :: SegBinOpSlug -> [LParam GPUMem]
slugParams :: SegBinOpSlug -> [LParam GPUMem]
slugParams = forall {k} (rep :: k). Lambda rep -> [LParam rep]
lambdaParams forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall {k} (rep :: k). SegBinOp rep -> Lambda rep
segBinOpLambda forall b c a. (b -> c) -> (a -> b) -> a -> c
. SegBinOpSlug -> SegBinOp GPUMem
slugOp
slugNeutral :: SegBinOpSlug -> [SubExp]
slugNeutral :: SegBinOpSlug -> [SubExp]
slugNeutral = forall {k} (rep :: k). SegBinOp rep -> [SubExp]
segBinOpNeutral forall b c a. (b -> c) -> (a -> b) -> a -> c
. SegBinOpSlug -> SegBinOp GPUMem
slugOp
slugShape :: SegBinOpSlug -> Shape
slugShape :: SegBinOpSlug -> Shape
slugShape = forall {k} (rep :: k). SegBinOp rep -> Shape
segBinOpShape forall b c a. (b -> c) -> (a -> b) -> a -> c
. SegBinOpSlug -> SegBinOp GPUMem
slugOp
slugsComm :: [SegBinOpSlug] -> Commutativity
slugsComm :: [SegBinOpSlug] -> Commutativity
slugsComm = forall a. Monoid a => [a] -> a
mconcat forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall a b. (a -> b) -> [a] -> [b]
map (forall {k} (rep :: k). SegBinOp rep -> Commutativity
segBinOpComm forall b c a. (b -> c) -> (a -> b) -> a -> c
. SegBinOpSlug -> SegBinOp GPUMem
slugOp)
accParams, nextParams :: SegBinOpSlug -> [LParam GPUMem]
accParams :: SegBinOpSlug -> [LParam GPUMem]
accParams SegBinOpSlug
slug = forall a. Int -> [a] -> [a]
take (forall (t :: * -> *) a. Foldable t => t a -> Int
length (SegBinOpSlug -> [SubExp]
slugNeutral SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ SegBinOpSlug -> [LParam GPUMem]
slugParams SegBinOpSlug
slug
nextParams :: SegBinOpSlug -> [LParam GPUMem]
nextParams SegBinOpSlug
slug = forall a. Int -> [a] -> [a]
drop (forall (t :: * -> *) a. Foldable t => t a -> Int
length (SegBinOpSlug -> [SubExp]
slugNeutral SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ SegBinOpSlug -> [LParam GPUMem]
slugParams SegBinOpSlug
slug
segBinOpSlug :: Imp.TExp Int32 -> Imp.TExp Int32 -> (SegBinOp GPUMem, [VName], [VName]) -> InKernelGen SegBinOpSlug
segBinOpSlug :: TPrimExp Int32 VName
-> TPrimExp Int32 VName
-> (SegBinOp GPUMem, [VName], [VName])
-> InKernelGen SegBinOpSlug
segBinOpSlug TPrimExp Int32 VName
local_tid TPrimExp Int32 VName
group_id (SegBinOp GPUMem
op, [VName]
group_res_arrs, [VName]
param_arrs) =
SegBinOp GPUMem
-> [VName] -> [(VName, [TPrimExp Int64 VName])] -> SegBinOpSlug
SegBinOpSlug SegBinOp GPUMem
op [VName]
group_res_arrs
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> forall (m :: * -> *) a b c.
Applicative m =>
(a -> b -> m c) -> [a] -> [b] -> m [c]
zipWithM Param LParamMem
-> VName
-> ImpM GPUMem KernelEnv KernelOp (VName, [TPrimExp Int64 VName])
mkAcc (forall {k} (rep :: k). Lambda rep -> [LParam rep]
lambdaParams (forall {k} (rep :: k). SegBinOp rep -> Lambda rep
segBinOpLambda SegBinOp GPUMem
op)) [VName]
param_arrs
where
mkAcc :: Param LParamMem
-> VName
-> ImpM GPUMem KernelEnv KernelOp (VName, [TPrimExp Int64 VName])
mkAcc Param LParamMem
p VName
param_arr
| Prim PrimType
t <- forall dec. Typed dec => Param dec -> Type
paramType Param LParamMem
p,
forall a. ArrayShape a => a -> Int
shapeRank (forall {k} (rep :: k). SegBinOp rep -> Shape
segBinOpShape SegBinOp GPUMem
op) forall a. Eq a => a -> a -> Bool
== Int
0 = do
TV Any
acc <- forall {k1} {k2} (rep :: k1) r op (t :: k2).
String -> PrimType -> ImpM rep r op (TV t)
dPrim (VName -> String
baseString (forall dec. Param dec -> VName
paramName Param LParamMem
p) forall a. Semigroup a => a -> a -> a
<> String
"_acc") PrimType
t
forall (f :: * -> *) a. Applicative f => a -> f a
pure (forall {k} (t :: k). TV t -> VName
tvVar TV Any
acc, [])
| Bool
otherwise =
forall (f :: * -> *) a. Applicative f => a -> f a
pure (VName
param_arr, [forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
local_tid, forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
group_id])
computeThreadChunkSize ::
Commutativity ->
Imp.TExp Int64 ->
Imp.TExp Int64 ->
Imp.Count Imp.Elements (Imp.TExp Int64) ->
Imp.Count Imp.Elements (Imp.TExp Int64) ->
TV Int64 ->
ImpM rep r op ()
computeThreadChunkSize :: forall {k} (rep :: k) r op.
Commutativity
-> TPrimExp Int64 VName
-> TPrimExp Int64 VName
-> Count Elements (TPrimExp Int64 VName)
-> Count Elements (TPrimExp Int64 VName)
-> TV Int64
-> ImpM rep r op ()
computeThreadChunkSize Commutativity
Commutative TPrimExp Int64 VName
threads_per_segment TPrimExp Int64 VName
thread_index Count Elements (TPrimExp Int64 VName)
elements_per_thread Count Elements (TPrimExp Int64 VName)
num_elements TV Int64
chunk_var =
TV Int64
chunk_var
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
TV t -> TExp t -> ImpM rep r op ()
<-- forall v. TPrimExp Int64 v -> TPrimExp Int64 v -> TPrimExp Int64 v
sMin64
(forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
elements_per_thread)
((forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
num_elements forall a. Num a => a -> a -> a
- TPrimExp Int64 VName
thread_index) forall e. IntegralExp e => e -> e -> e
`divUp` TPrimExp Int64 VName
threads_per_segment)
computeThreadChunkSize Commutativity
Noncommutative TPrimExp Int64 VName
_ TPrimExp Int64 VName
thread_index Count Elements (TPrimExp Int64 VName)
elements_per_thread Count Elements (TPrimExp Int64 VName)
num_elements TV Int64
chunk_var = do
TV Int64
starting_point <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TV t)
dPrimV String
"starting_point" forall a b. (a -> b) -> a -> b
$
TPrimExp Int64 VName
thread_index forall a. Num a => a -> a -> a
* forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
elements_per_thread
TV Int64
remaining_elements <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TV t)
dPrimV String
"remaining_elements" forall a b. (a -> b) -> a -> b
$
forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
num_elements forall a. Num a => a -> a -> a
- forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
starting_point
let no_remaining_elements :: TPrimExp Bool VName
no_remaining_elements = forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
remaining_elements forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<=. TPrimExp Int64 VName
0
beyond_bounds :: TPrimExp Bool VName
beyond_bounds = forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
num_elements forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<=. forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
starting_point
forall {k} (rep :: k) r op.
TPrimExp Bool VName
-> ImpM rep r op () -> ImpM rep r op () -> ImpM rep r op ()
sIf
(TPrimExp Bool VName
no_remaining_elements forall v. TPrimExp Bool v -> TPrimExp Bool v -> TPrimExp Bool v
.||. TPrimExp Bool VName
beyond_bounds)
(TV Int64
chunk_var forall {k1} {k2} (t :: k1) (rep :: k2) r op.
TV t -> TExp t -> ImpM rep r op ()
<-- TPrimExp Int64 VName
0)
( forall {k} (rep :: k) r op.
TPrimExp Bool VName
-> ImpM rep r op () -> ImpM rep r op () -> ImpM rep r op ()
sIf
TPrimExp Bool VName
is_last_thread
(TV Int64
chunk_var forall {k1} {k2} (t :: k1) (rep :: k2) r op.
TV t -> TExp t -> ImpM rep r op ()
<-- forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
last_thread_elements)
(TV Int64
chunk_var forall {k1} {k2} (t :: k1) (rep :: k2) r op.
TV t -> TExp t -> ImpM rep r op ()
<-- forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
elements_per_thread)
)
where
last_thread_elements :: Count Elements (TPrimExp Int64 VName)
last_thread_elements =
Count Elements (TPrimExp Int64 VName)
num_elements forall a. Num a => a -> a -> a
- forall a. a -> Count Elements a
Imp.elements TPrimExp Int64 VName
thread_index forall a. Num a => a -> a -> a
* Count Elements (TPrimExp Int64 VName)
elements_per_thread
is_last_thread :: TPrimExp Bool VName
is_last_thread =
forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
num_elements
forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<. (TPrimExp Int64 VName
thread_index forall a. Num a => a -> a -> a
+ TPrimExp Int64 VName
1)
forall a. Num a => a -> a -> a
* forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
elements_per_thread
reductionStageZero ::
KernelConstants ->
[(VName, Imp.TExp Int64)] ->
Imp.Count Imp.Elements (Imp.TExp Int64) ->
Imp.TExp Int64 ->
Imp.Count Imp.Elements (Imp.TExp Int64) ->
Imp.TExp Int64 ->
[SegBinOpSlug] ->
DoSegBody ->
InKernelGen ([Lambda GPUMem], InKernelGen ())
reductionStageZero :: KernelConstants
-> [(VName, TPrimExp Int64 VName)]
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> [SegBinOpSlug]
-> DoSegBody
-> InKernelGen ([Lambda GPUMem], InKernelGen ())
reductionStageZero KernelConstants
constants [(VName, TPrimExp Int64 VName)]
ispace Count Elements (TPrimExp Int64 VName)
num_elements TPrimExp Int64 VName
global_tid Count Elements (TPrimExp Int64 VName)
elems_per_thread TPrimExp Int64 VName
threads_per_segment [SegBinOpSlug]
slugs DoSegBody
body = do
let ([VName]
gtids, [TPrimExp Int64 VName]
_dims) = forall a b. [(a, b)] -> ([a], [b])
unzip [(VName, TPrimExp Int64 VName)]
ispace
gtid :: TV Int64
gtid = forall {k} (t :: k). VName -> PrimType -> TV t
mkTV (forall a. [a] -> a
last [VName]
gtids) PrimType
int64
local_tid :: TPrimExp Int64 VName
local_tid = forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 forall a b. (a -> b) -> a -> b
$ KernelConstants -> TPrimExp Int32 VName
kernelLocalThreadId KernelConstants
constants
TV Int64
chunk_size <- forall {k1} {k2} (rep :: k1) r op (t :: k2).
String -> PrimType -> ImpM rep r op (TV t)
dPrim String
"chunk_size" PrimType
int64
forall {k} (rep :: k) r op.
Commutativity
-> TPrimExp Int64 VName
-> TPrimExp Int64 VName
-> Count Elements (TPrimExp Int64 VName)
-> Count Elements (TPrimExp Int64 VName)
-> TV Int64
-> ImpM rep r op ()
computeThreadChunkSize
([SegBinOpSlug] -> Commutativity
slugsComm [SegBinOpSlug]
slugs)
TPrimExp Int64 VName
threads_per_segment
(forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int64 VName
global_tid)
Count Elements (TPrimExp Int64 VName)
elems_per_thread
Count Elements (TPrimExp Int64 VName)
num_elements
TV Int64
chunk_size
forall {k} (rep :: k) inner r op.
Mem rep inner =>
Maybe (Exp rep) -> Scope rep -> ImpM rep r op ()
dScope forall a. Maybe a
Nothing forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k) dec.
(LParamInfo rep ~ dec) =>
[Param dec] -> Scope rep
scopeOfLParams forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap SegBinOpSlug -> [LParam GPUMem]
slugParams [SegBinOpSlug]
slugs
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"neutral-initialise the accumulators" forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ [SegBinOpSlug]
slugs forall a b. (a -> b) -> a -> b
$ \SegBinOpSlug
slug ->
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip (SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs SegBinOpSlug
slug) (SegBinOpSlug -> [SubExp]
slugNeutral SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ \((VName
acc, [TPrimExp Int64 VName]
acc_is), SubExp
ne) ->
forall {k} (rep :: k) r op.
Shape
-> ([TPrimExp Int64 VName] -> ImpM rep r op ()) -> ImpM rep r op ()
sLoopNest (SegBinOpSlug -> Shape
slugShape SegBinOpSlug
slug) forall a b. (a -> b) -> a -> b
$ \[TPrimExp Int64 VName]
vec_is ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
acc ([TPrimExp Int64 VName]
acc_is forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is) SubExp
ne []
[Lambda GPUMem]
slugs_op_renamed <- forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM (forall {k} (rep :: k) (m :: * -> *).
(Renameable rep, MonadFreshNames m) =>
Lambda rep -> m (Lambda rep)
renameLambda forall b c a. (b -> c) -> (a -> b) -> a -> c
. forall {k} (rep :: k). SegBinOp rep -> Lambda rep
segBinOpLambda forall b c a. (b -> c) -> (a -> b) -> a -> c
. SegBinOpSlug -> SegBinOp GPUMem
slugOp) [SegBinOpSlug]
slugs
let doTheReduction :: InKernelGen ()
doTheReduction =
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [Lambda GPUMem]
slugs_op_renamed [SegBinOpSlug]
slugs) forall a b. (a -> b) -> a -> b
$ \(Lambda GPUMem
slug_op_renamed, SegBinOpSlug
slug) ->
forall {k} (rep :: k) r op.
Shape
-> ([TPrimExp Int64 VName] -> ImpM rep r op ()) -> ImpM rep r op ()
sLoopNest (SegBinOpSlug -> Shape
slugShape SegBinOpSlug
slug) forall a b. (a -> b) -> a -> b
$ \[TPrimExp Int64 VName]
vec_is -> do
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
comment Text
"to reduce current chunk, first store our result in memory" forall a b. (a -> b) -> a -> b
$ do
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip (SegBinOpSlug -> [LParam GPUMem]
slugParams SegBinOpSlug
slug) (SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ \(Param LParamMem
p, (VName
acc, [TPrimExp Int64 VName]
acc_is)) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix (forall dec. Param dec -> VName
paramName Param LParamMem
p) [] (VName -> SubExp
Var VName
acc) ([TPrimExp Int64 VName]
acc_is forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is)
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip (SegBinOpSlug -> [VName]
slugArrs SegBinOpSlug
slug) (SegBinOpSlug -> [LParam GPUMem]
slugParams SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ \(VName
arr, Param LParamMem
p) ->
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (forall shape u. TypeBase shape u -> Bool
primType forall a b. (a -> b) -> a -> b
$ forall dec. Typed dec => Param dec -> Type
paramType Param LParamMem
p) forall a b. (a -> b) -> a -> b
$
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
arr [TPrimExp Int64 VName
local_tid] (VName -> SubExp
Var forall a b. (a -> b) -> a -> b
$ forall dec. Param dec -> VName
paramName Param LParamMem
p) []
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$ Fence -> KernelOp
Imp.ErrorSync Fence
Imp.FenceLocal
TPrimExp Int32 VName -> Lambda GPUMem -> [VName] -> InKernelGen ()
groupReduce (forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int32 v
sExt32 (KernelConstants -> TPrimExp Int64 VName
kernelGroupSize KernelConstants
constants)) Lambda GPUMem
slug_op_renamed (SegBinOpSlug -> [VName]
slugArrs SegBinOpSlug
slug)
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$ Fence -> KernelOp
Imp.Barrier Fence
Imp.FenceLocal
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"first thread saves the result in accumulator" forall a b. (a -> b) -> a -> b
$
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (TPrimExp Int64 VName
local_tid forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.==. TPrimExp Int64 VName
0) forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip (SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs SegBinOpSlug
slug) (forall {k} (rep :: k). Lambda rep -> [LParam rep]
lambdaParams Lambda GPUMem
slug_op_renamed)) forall a b. (a -> b) -> a -> b
$ \((VName
acc, [TPrimExp Int64 VName]
acc_is), Param LParamMem
p) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
acc ([TPrimExp Int64 VName]
acc_is forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is) (VName -> SubExp
Var forall a b. (a -> b) -> a -> b
$ forall dec. Param dec -> VName
paramName Param LParamMem
p) []
let comm :: Commutativity
comm = [SegBinOpSlug] -> Commutativity
slugsComm [SegBinOpSlug]
slugs
(TPrimExp Int64 VName
bound, InKernelGen () -> InKernelGen ()
check_bounds) =
case Commutativity
comm of
Commutativity
Commutative -> (forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
chunk_size, forall a. a -> a
id)
Commutativity
Noncommutative ->
( forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
elems_per_thread,
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
gtid forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<. forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
num_elements)
)
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String
-> TExp t -> (TExp t -> ImpM rep r op ()) -> ImpM rep r op ()
sFor String
"i" TPrimExp Int64 VName
bound forall a b. (a -> b) -> a -> b
$ \TPrimExp Int64 VName
i -> do
TV Int64
gtid
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
TV t -> TExp t -> ImpM rep r op ()
<-- case Commutativity
comm of
Commutativity
Commutative ->
TPrimExp Int64 VName
global_tid forall a. Num a => a -> a -> a
+ TPrimExp Int64 VName
threads_per_segment forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
i
Commutativity
Noncommutative ->
let index_in_segment :: TPrimExp Int64 VName
index_in_segment = TPrimExp Int64 VName
global_tid forall e. IntegralExp e => e -> e -> e
`quot` KernelConstants -> TPrimExp Int64 VName
kernelGroupSize KernelConstants
constants
in forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int64 VName
local_tid
forall a. Num a => a -> a -> a
+ (TPrimExp Int64 VName
index_in_segment forall a. Num a => a -> a -> a
* forall {k} (u :: k) e. Count u e -> e
Imp.unCount Count Elements (TPrimExp Int64 VName)
elems_per_thread forall a. Num a => a -> a -> a
+ TPrimExp Int64 VName
i)
forall a. Num a => a -> a -> a
* KernelConstants -> TPrimExp Int64 VName
kernelGroupSize KernelConstants
constants
InKernelGen () -> InKernelGen ()
check_bounds forall a b. (a -> b) -> a -> b
$
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"apply map function" forall a b. (a -> b) -> a -> b
$
DoSegBody
body forall a b. (a -> b) -> a -> b
$ \[(SubExp, [TPrimExp Int64 VName])]
all_red_res -> do
let slugs_res :: [[(SubExp, [TPrimExp Int64 VName])]]
slugs_res = forall a. [Int] -> [a] -> [[a]]
chunks (forall a b. (a -> b) -> [a] -> [b]
map (forall (t :: * -> *) a. Foldable t => t a -> Int
length forall b c a. (b -> c) -> (a -> b) -> a -> c
. SegBinOpSlug -> [SubExp]
slugNeutral) [SegBinOpSlug]
slugs) [(SubExp, [TPrimExp Int64 VName])]
all_red_res
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [SegBinOpSlug]
slugs [[(SubExp, [TPrimExp Int64 VName])]]
slugs_res) forall a b. (a -> b) -> a -> b
$ \(SegBinOpSlug
slug, [(SubExp, [TPrimExp Int64 VName])]
red_res) ->
forall {k} (rep :: k) r op.
Shape
-> ([TPrimExp Int64 VName] -> ImpM rep r op ()) -> ImpM rep r op ()
sLoopNest (SegBinOpSlug -> Shape
slugShape SegBinOpSlug
slug) forall a b. (a -> b) -> a -> b
$ \[TPrimExp Int64 VName]
vec_is -> do
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"load accumulator" forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip (SegBinOpSlug -> [LParam GPUMem]
accParams SegBinOpSlug
slug) (SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ \(Param LParamMem
p, (VName
acc, [TPrimExp Int64 VName]
acc_is)) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix (forall dec. Param dec -> VName
paramName Param LParamMem
p) [] (VName -> SubExp
Var VName
acc) ([TPrimExp Int64 VName]
acc_is forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is)
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"load new values" forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip (SegBinOpSlug -> [LParam GPUMem]
nextParams SegBinOpSlug
slug) [(SubExp, [TPrimExp Int64 VName])]
red_res) forall a b. (a -> b) -> a -> b
$ \(Param LParamMem
p, (SubExp
res, [TPrimExp Int64 VName]
res_is)) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix (forall dec. Param dec -> VName
paramName Param LParamMem
p) [] SubExp
res ([TPrimExp Int64 VName]
res_is forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is)
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"apply reduction operator"
forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k) r op.
Names -> Stms rep -> ImpM rep r op () -> ImpM rep r op ()
compileStms forall a. Monoid a => a
mempty (forall {k} (rep :: k). Body rep -> Stms rep
bodyStms forall a b. (a -> b) -> a -> b
$ SegBinOpSlug -> Body GPUMem
slugBody SegBinOpSlug
slug)
forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"store in accumulator"
forall a b. (a -> b) -> a -> b
$ forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_
( forall a b. [a] -> [b] -> [(a, b)]
zip
(SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs SegBinOpSlug
slug)
(forall a b. (a -> b) -> [a] -> [b]
map SubExpRes -> SubExp
resSubExp forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k). Body rep -> Result
bodyResult forall a b. (a -> b) -> a -> b
$ SegBinOpSlug -> Body GPUMem
slugBody SegBinOpSlug
slug)
)
forall a b. (a -> b) -> a -> b
$ \((VName
acc, [TPrimExp Int64 VName]
acc_is), SubExp
se) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
acc ([TPrimExp Int64 VName]
acc_is forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is) SubExp
se []
case Commutativity
comm of
Commutativity
Noncommutative -> do
InKernelGen ()
doTheReduction
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"first thread keeps accumulator; others reset to neutral element" forall a b. (a -> b) -> a -> b
$ do
let reset_to_neutral :: InKernelGen ()
reset_to_neutral =
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ [SegBinOpSlug]
slugs forall a b. (a -> b) -> a -> b
$ \SegBinOpSlug
slug ->
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip (SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs SegBinOpSlug
slug) (SegBinOpSlug -> [SubExp]
slugNeutral SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ \((VName
acc, [TPrimExp Int64 VName]
acc_is), SubExp
ne) ->
forall {k} (rep :: k) r op.
Shape
-> ([TPrimExp Int64 VName] -> ImpM rep r op ()) -> ImpM rep r op ()
sLoopNest (SegBinOpSlug -> Shape
slugShape SegBinOpSlug
slug) forall a b. (a -> b) -> a -> b
$ \[TPrimExp Int64 VName]
vec_is ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
acc ([TPrimExp Int64 VName]
acc_is forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is) SubExp
ne []
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sUnless (TPrimExp Int64 VName
local_tid forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.==. TPrimExp Int64 VName
0) InKernelGen ()
reset_to_neutral
Commutativity
_ -> forall (f :: * -> *) a. Applicative f => a -> f a
pure ()
forall (f :: * -> *) a. Applicative f => a -> f a
pure ([Lambda GPUMem]
slugs_op_renamed, InKernelGen ()
doTheReduction)
reductionStageOne ::
KernelConstants ->
[(VName, Imp.TExp Int64)] ->
Imp.Count Imp.Elements (Imp.TExp Int64) ->
Imp.TExp Int64 ->
Imp.Count Imp.Elements (Imp.TExp Int64) ->
Imp.TExp Int64 ->
[SegBinOpSlug] ->
DoSegBody ->
InKernelGen [Lambda GPUMem]
reductionStageOne :: KernelConstants
-> [(VName, TPrimExp Int64 VName)]
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> [SegBinOpSlug]
-> DoSegBody
-> InKernelGen [Lambda GPUMem]
reductionStageOne KernelConstants
constants [(VName, TPrimExp Int64 VName)]
ispace Count Elements (TPrimExp Int64 VName)
num_elements TPrimExp Int64 VName
global_tid Count Elements (TPrimExp Int64 VName)
elems_per_thread TPrimExp Int64 VName
threads_per_segment [SegBinOpSlug]
slugs DoSegBody
body = do
([Lambda GPUMem]
slugs_op_renamed, InKernelGen ()
doTheReduction) <-
KernelConstants
-> [(VName, TPrimExp Int64 VName)]
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> Count Elements (TPrimExp Int64 VName)
-> TPrimExp Int64 VName
-> [SegBinOpSlug]
-> DoSegBody
-> InKernelGen ([Lambda GPUMem], InKernelGen ())
reductionStageZero KernelConstants
constants [(VName, TPrimExp Int64 VName)]
ispace Count Elements (TPrimExp Int64 VName)
num_elements TPrimExp Int64 VName
global_tid Count Elements (TPrimExp Int64 VName)
elems_per_thread TPrimExp Int64 VName
threads_per_segment [SegBinOpSlug]
slugs DoSegBody
body
case [SegBinOpSlug] -> Commutativity
slugsComm [SegBinOpSlug]
slugs of
Commutativity
Noncommutative -> forall (f :: * -> *) a. Applicative f => a -> f a
pure ()
Commutativity
Commutative -> InKernelGen ()
doTheReduction
forall (f :: * -> *) a. Applicative f => a -> f a
pure [Lambda GPUMem]
slugs_op_renamed
reductionStageTwo ::
KernelConstants ->
[PatElem LetDecMem] ->
Imp.TExp Int32 ->
Imp.TExp Int32 ->
[Imp.TExp Int64] ->
Imp.TExp Int64 ->
Imp.TExp Int64 ->
SegBinOpSlug ->
[LParam GPUMem] ->
[LParam GPUMem] ->
Lambda GPUMem ->
[SubExp] ->
Imp.TExp Int32 ->
VName ->
Imp.TExp Int32 ->
VName ->
[VName] ->
[VName] ->
InKernelGen ()
reductionStageTwo :: KernelConstants
-> [PatElem LParamMem]
-> TPrimExp Int32 VName
-> TPrimExp Int32 VName
-> [TPrimExp Int64 VName]
-> TPrimExp Int64 VName
-> TPrimExp Int64 VName
-> SegBinOpSlug
-> [LParam GPUMem]
-> [LParam GPUMem]
-> Lambda GPUMem
-> [SubExp]
-> TPrimExp Int32 VName
-> VName
-> TPrimExp Int32 VName
-> VName
-> [VName]
-> [VName]
-> InKernelGen ()
reductionStageTwo
KernelConstants
constants
[PatElem LParamMem]
segred_pes
TPrimExp Int32 VName
group_id
TPrimExp Int32 VName
flat_segment_id
[TPrimExp Int64 VName]
segment_gtids
TPrimExp Int64 VName
first_group_for_segment
TPrimExp Int64 VName
groups_per_segment
SegBinOpSlug
slug
[LParam GPUMem]
red_x_params
[LParam GPUMem]
red_y_params
Lambda GPUMem
red_op_renamed
[SubExp]
nes
TPrimExp Int32 VName
num_counters
VName
counter
TPrimExp Int32 VName
counter_i
VName
sync_arr
[VName]
group_res_arrs
[VName]
red_arrs = do
let local_tid :: TPrimExp Int32 VName
local_tid = KernelConstants -> TPrimExp Int32 VName
kernelLocalThreadId KernelConstants
constants
group_size :: TPrimExp Int64 VName
group_size = KernelConstants -> TPrimExp Int64 VName
kernelGroupSize KernelConstants
constants
TV Int64
old_counter <- forall {k1} {k2} (rep :: k1) r op (t :: k2).
String -> PrimType -> ImpM rep r op (TV t)
dPrim String
"old_counter" PrimType
int32
(VName
counter_mem, Space
_, Count Elements (TPrimExp Int64 VName)
counter_offset) <-
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> ImpM
rep r op (VName, Space, Count Elements (TPrimExp Int64 VName))
fullyIndexArray
VName
counter
[ forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 forall a b. (a -> b) -> a -> b
$
TPrimExp Int32 VName
counter_i forall a. Num a => a -> a -> a
* TPrimExp Int32 VName
num_counters
forall a. Num a => a -> a -> a
+ TPrimExp Int32 VName
flat_segment_id forall e. IntegralExp e => e -> e -> e
`rem` TPrimExp Int32 VName
num_counters
]
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
comment Text
"first thread in group saves group result to global memory" forall a b. (a -> b) -> a -> b
$
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (TPrimExp Int32 VName
local_tid forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.==. TPrimExp Int32 VName
0) forall a b. (a -> b) -> a -> b
$ do
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a. Int -> [a] -> [a]
take (forall (t :: * -> *) a. Foldable t => t a -> Int
length [SubExp]
nes) forall a b. (a -> b) -> a -> b
$ forall a b. [a] -> [b] -> [(a, b)]
zip [VName]
group_res_arrs (SegBinOpSlug -> [(VName, [TPrimExp Int64 VName])]
slugAccs SegBinOpSlug
slug)) forall a b. (a -> b) -> a -> b
$ \(VName
v, (VName
acc, [TPrimExp Int64 VName]
acc_is)) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
v [TPrimExp Int64 VName
0, forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
group_id] (VName -> SubExp
Var VName
acc) [TPrimExp Int64 VName]
acc_is
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$ Fence -> KernelOp
Imp.MemFence Fence
Imp.FenceGlobal
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp
forall a b. (a -> b) -> a -> b
$ Space -> AtomicOp -> KernelOp
Imp.Atomic Space
DefaultSpace
forall a b. (a -> b) -> a -> b
$ IntType
-> VName
-> VName
-> Count Elements (TPrimExp Int64 VName)
-> Exp
-> AtomicOp
Imp.AtomicAdd
IntType
Int32
(forall {k} (t :: k). TV t -> VName
tvVar TV Int64
old_counter)
VName
counter_mem
Count Elements (TPrimExp Int64 VName)
counter_offset
forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped (TPrimExp Int32 VName
1 :: Imp.TExp Int32)
forall {k} (rep :: k) r op.
VName -> [TPrimExp Int64 VName] -> Exp -> ImpM rep r op ()
sWrite VName
sync_arr [TPrimExp Int64 VName
0] forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped forall a b. (a -> b) -> a -> b
$ forall {k} (t :: k). TV t -> TExp t
tvExp TV Int64
old_counter forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.==. TPrimExp Int64 VName
groups_per_segment forall a. Num a => a -> a -> a
- TPrimExp Int64 VName
1
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$ Fence -> KernelOp
Imp.Barrier Fence
Imp.FenceGlobal
TV Bool
is_last_group <- forall {k1} {k2} (rep :: k1) r op (t :: k2).
String -> PrimType -> ImpM rep r op (TV t)
dPrim String
"is_last_group" PrimType
Bool
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix (forall {k} (t :: k). TV t -> VName
tvVar TV Bool
is_last_group) [] (VName -> SubExp
Var VName
sync_arr) [TPrimExp Int64 VName
0]
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (forall {k} (t :: k). TV t -> TExp t
tvExp TV Bool
is_last_group) forall a b. (a -> b) -> a -> b
$ do
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (TPrimExp Int32 VName
local_tid forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.==. TPrimExp Int32 VName
0) forall a b. (a -> b) -> a -> b
$
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$
Space -> AtomicOp -> KernelOp
Imp.Atomic Space
DefaultSpace forall a b. (a -> b) -> a -> b
$
IntType
-> VName
-> VName
-> Count Elements (TPrimExp Int64 VName)
-> Exp
-> AtomicOp
Imp.AtomicAdd IntType
Int32 (forall {k} (t :: k). TV t -> VName
tvVar TV Int64
old_counter) VName
counter_mem Count Elements (TPrimExp Int64 VName)
counter_offset forall a b. (a -> b) -> a -> b
$
forall {k} (t :: k) v. TPrimExp t v -> PrimExp v
untyped forall a b. (a -> b) -> a -> b
$
forall a. Num a => a -> a
negate TPrimExp Int64 VName
groups_per_segment
forall {k} (rep :: k) r op.
Shape
-> ([TPrimExp Int64 VName] -> ImpM rep r op ()) -> ImpM rep r op ()
sLoopNest (SegBinOpSlug -> Shape
slugShape SegBinOpSlug
slug) forall a b. (a -> b) -> a -> b
$ \[TPrimExp Int64 VName]
vec_is -> do
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
comment Text
"read in the per-group-results" forall a b. (a -> b) -> a -> b
$ do
TPrimExp Int64 VName
read_per_thread <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TExp t)
dPrimVE String
"read_per_thread" forall a b. (a -> b) -> a -> b
$
TPrimExp Int64 VName
groups_per_segment forall e. IntegralExp e => e -> e -> e
`divUp` forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int64 VName
group_size
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [LParam GPUMem]
red_x_params [SubExp]
nes) forall a b. (a -> b) -> a -> b
$ \(Param LParamMem
p, SubExp
ne) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix (forall dec. Param dec -> VName
paramName Param LParamMem
p) [] SubExp
ne []
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String
-> TExp t -> (TExp t -> ImpM rep r op ()) -> ImpM rep r op ()
sFor String
"i" TPrimExp Int64 VName
read_per_thread forall a b. (a -> b) -> a -> b
$ \TPrimExp Int64 VName
i -> do
TPrimExp Int64 VName
group_res_id <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TExp t)
dPrimVE String
"group_res_id" forall a b. (a -> b) -> a -> b
$
forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
local_tid forall a. Num a => a -> a -> a
* TPrimExp Int64 VName
read_per_thread forall a. Num a => a -> a -> a
+ TPrimExp Int64 VName
i
TPrimExp Int64 VName
index_of_group_res <-
forall {k1} {k2} (t :: k1) (rep :: k2) r op.
String -> TExp t -> ImpM rep r op (TExp t)
dPrimVE String
"index_of_group_res" forall a b. (a -> b) -> a -> b
$
TPrimExp Int64 VName
first_group_for_segment forall a. Num a => a -> a -> a
+ TPrimExp Int64 VName
group_res_id
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (TPrimExp Int64 VName
group_res_id forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.<. TPrimExp Int64 VName
groups_per_segment) forall a b. (a -> b) -> a -> b
$ do
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [LParam GPUMem]
red_y_params [VName]
group_res_arrs) forall a b. (a -> b) -> a -> b
$
\(Param LParamMem
p, VName
group_res_arr) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix
(forall dec. Param dec -> VName
paramName Param LParamMem
p)
[]
(VName -> SubExp
Var VName
group_res_arr)
([TPrimExp Int64 VName
0, TPrimExp Int64 VName
index_of_group_res] forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is)
forall {k} (rep :: k) r op.
Names -> Stms rep -> ImpM rep r op () -> ImpM rep r op ()
compileStms forall a. Monoid a => a
mempty (forall {k} (rep :: k). Body rep -> Stms rep
bodyStms forall a b. (a -> b) -> a -> b
$ SegBinOpSlug -> Body GPUMem
slugBody SegBinOpSlug
slug) forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [LParam GPUMem]
red_x_params forall a b. (a -> b) -> a -> b
$ forall a b. (a -> b) -> [a] -> [b]
map SubExpRes -> SubExp
resSubExp forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k). Body rep -> Result
bodyResult forall a b. (a -> b) -> a -> b
$ SegBinOpSlug -> Body GPUMem
slugBody SegBinOpSlug
slug) forall a b. (a -> b) -> a -> b
$ \(Param LParamMem
p, SubExp
se) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix (forall dec. Param dec -> VName
paramName Param LParamMem
p) [] SubExp
se []
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [LParam GPUMem]
red_x_params [VName]
red_arrs) forall a b. (a -> b) -> a -> b
$ \(Param LParamMem
p, VName
arr) ->
forall (f :: * -> *). Applicative f => Bool -> f () -> f ()
when (forall shape u. TypeBase shape u -> Bool
primType forall a b. (a -> b) -> a -> b
$ forall dec. Typed dec => Param dec -> Type
paramType Param LParamMem
p) forall a b. (a -> b) -> a -> b
$
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix VName
arr [forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int64 v
sExt64 TPrimExp Int32 VName
local_tid] (VName -> SubExp
Var forall a b. (a -> b) -> a -> b
$ forall dec. Param dec -> VName
paramName Param LParamMem
p) []
forall {k} op (rep :: k) r. op -> ImpM rep r op ()
sOp forall a b. (a -> b) -> a -> b
$ Fence -> KernelOp
Imp.Barrier Fence
Imp.FenceLocal
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"reduce the per-group results" forall a b. (a -> b) -> a -> b
$ do
TPrimExp Int32 VName -> Lambda GPUMem -> [VName] -> InKernelGen ()
groupReduce (forall {k} (t :: k) v. IntExp t => TPrimExp t v -> TPrimExp Int32 v
sExt32 TPrimExp Int64 VName
group_size) Lambda GPUMem
red_op_renamed [VName]
red_arrs
forall {k} (rep :: k) r op.
Text -> ImpM rep r op () -> ImpM rep r op ()
sComment Text
"and back to memory with the final result" forall a b. (a -> b) -> a -> b
$
forall {k} (rep :: k) r op.
TPrimExp Bool VName -> ImpM rep r op () -> ImpM rep r op ()
sWhen (TPrimExp Int32 VName
local_tid forall {k} (t :: k) v.
TPrimExp t v -> TPrimExp t v -> TPrimExp Bool v
.==. TPrimExp Int32 VName
0) forall a b. (a -> b) -> a -> b
$
forall (t :: * -> *) (m :: * -> *) a b.
(Foldable t, Monad m) =>
t a -> (a -> m b) -> m ()
forM_ (forall a b. [a] -> [b] -> [(a, b)]
zip [PatElem LParamMem]
segred_pes forall a b. (a -> b) -> a -> b
$ forall {k} (rep :: k). Lambda rep -> [LParam rep]
lambdaParams Lambda GPUMem
red_op_renamed) forall a b. (a -> b) -> a -> b
$ \(PatElem LParamMem
pe, Param LParamMem
p) ->
forall {k} (rep :: k) r op.
VName
-> [TPrimExp Int64 VName]
-> SubExp
-> [TPrimExp Int64 VName]
-> ImpM rep r op ()
copyDWIMFix
(forall dec. PatElem dec -> VName
patElemName PatElem LParamMem
pe)
([TPrimExp Int64 VName]
segment_gtids forall a. [a] -> [a] -> [a]
++ [TPrimExp Int64 VName]
vec_is)
(VName -> SubExp
Var forall a b. (a -> b) -> a -> b
$ forall dec. Param dec -> VName
paramName Param LParamMem
p)
[]