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{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE Strict #-}
module Core
( CoreState(..)
, SalisState(..)
, new
, step
) where
import Control.Monad (replicateM, replicateM_, when)
import Control.Monad.Par (NFData, parMap, runPar)
import Control.Monad.ST (ST, runST)
import Control.Monad.State.Strict (State, evalState, state)
import Data.Bits ((!<<.), (!>>.), (.^.), (.|.), complementBit)
import Data.STRef (STRef, modifySTRef', newSTRef, readSTRef, writeSTRef)
import qualified Data.Vector as V (Vector, fromList)
import qualified Data.Vector.Unboxed as U (Vector, fromList, replicate, thaw, unsafeFreeze)
import qualified Data.Vector.Unboxed.Mutable as M (STVector, unsafeModify, unsafeRead)
import Data.Word (Word64, Word8)
import GHC.Generics (Generic)
import System.Random.SplitMix (SMGen, mkSMGen, nextWord64)
import Arch.Dummy (Process(..), procAncestor, procSliceM, procStepM)
import Config (coreCount, coreSize, syncInterval)
mvecInit :: U.Vector Word8
mvecInit = U.replicate (fromIntegral coreSize) 0
mvecLoop :: Word64 -> Word64
mvecLoop = (`mod` coreSize)
mvecMutateM :: M.STVector s Word8 -> Word64 -> Word64 -> ST s ()
mvecMutateM mvecM a b = do
let a' = fromIntegral $ mvecLoop a
let b' = fromIntegral b
when (b /= 0) $ M.unsafeModify mvecM (`complementBit` b') a'
mutaSeeds :: State SMGen [[Word64]]
mutaSeeds = replicateM coreCount $ replicateM 4 $ state nextWord64
mutaInit :: Word64 -> [[Word64]]
mutaInit 0 = replicate coreCount $ replicate 4 0
mutaInit s = evalState mutaSeeds $ mkSMGen s
mutaR64 :: Word64 -> Int -> Word64
mutaR64 x k = (x !<<. k) .|. (x !>>. (64 - k))
mutaXorM :: M.STVector s Word64 -> Int -> Int -> ST s ()
mutaXorM mutaM a b = M.unsafeRead mutaM b >>= \b' -> M.unsafeModify mutaM (.^. b') a
mutaNextM :: M.STVector s Word64 -> ST s Word64
mutaNextM mutaM = do
s1 <- M.unsafeRead mutaM 1
let r = mutaR64 (s1 * 5) 7 * 9
let t = s1 !<<. 17
mutaXorM mutaM 2 0
mutaXorM mutaM 3 1
mutaXorM mutaM 1 2
mutaXorM mutaM 0 3
M.unsafeModify mutaM (.^. t) 2
M.unsafeModify mutaM (`mutaR64` 45) 3
return r
mutaCosmicRayM :: M.STVector s Word64 -> M.STVector s Word8 -> ST s ()
mutaCosmicRayM mutaM mvecM = do
a <- mutaNextM mutaM
b <- mutaNextM mutaM
mvecMutateM mvecM a (b `mod` 8)
pvecInit :: U.Vector Process
pvecInit = U.fromList [procAncestor]
pvecBirthM :: M.STVector s Process -> Maybe Process -> ST s ()
pvecBirthM _ _ = return ()
data CoreState = CoreState
{ loop :: Word64
, mall :: Word64
, pnum :: Word64
, pcap :: Word64
, pfst :: Word64
, plst :: Word64
, pcur :: Word64
, psli :: Word64
, muta :: U.Vector Word64
, mvec :: U.Vector Word8
, pvec :: U.Vector Process
} deriving (Generic, NFData)
data CoreStateM s = CoreStateM
{ loopM :: STRef s Word64
, mallM :: STRef s Word64
, pnumM :: STRef s Word64
, pcapM :: STRef s Word64
, pfstM :: STRef s Word64
, plstM :: STRef s Word64
, pcurM :: STRef s Word64
, psliM :: STRef s Word64
, mutaM :: M.STVector s Word64
, mvecM :: M.STVector s Word8
, pvecM :: M.STVector s Process
}
coreInit :: [Word64] -> CoreState
coreInit s =
CoreState
{ loop = 0
, mall = 0
, pnum = 1
, pcap = 1
, pfst = 0
, plst = 0
, pcur = 0
, psli = 0
, muta = U.fromList s
, mvec = mvecInit
, pvec = pvecInit
}
coreCycle :: Int -> CoreState -> CoreState
coreCycle n c = runST $ coreThawM c >>= (\c' -> replicateM_ n (coreStepM c') >> coreFreezeM c')
coreThawM :: CoreState -> ST s (CoreStateM s)
coreThawM CoreState {..} =
CoreStateM
<$> newSTRef loop
<*> newSTRef mall
<*> newSTRef pnum
<*> newSTRef pcap
<*> newSTRef pfst
<*> newSTRef plst
<*> newSTRef pcur
<*> newSTRef psli
<*> U.thaw muta
<*> U.thaw mvec
<*> U.thaw pvec
coreStepM :: CoreStateM s -> ST s ()
coreStepM c@CoreStateM {..} = do
psli' <- readSTRef psliM
pcur' <- readSTRef pcurM
if psli' /= 0
then do
modifySTRef' psliM $ subtract 1
child <- procStepM pvecM mvecM pcur'
pvecBirthM pvecM child
else do
plst' <- readSTRef plstM
if pcur' /= plst'
then do
modifySTRef' pcurM succ
pnext <- readSTRef pcurM
pnsli <- procSliceM pvecM mvecM pnext
writeSTRef psliM pnsli
coreStepM c
else do
pnext <- readSTRef pfstM
pnsli <- procSliceM pvecM mvecM pnext
modifySTRef' loopM succ
writeSTRef pcurM pnext
writeSTRef psliM pnsli
mutaCosmicRayM mutaM mvecM
coreStepM c
coreFreezeM :: CoreStateM s -> ST s CoreState
coreFreezeM CoreStateM {..} =
CoreState
<$> readSTRef loopM
<*> readSTRef mallM
<*> readSTRef pnumM
<*> readSTRef pcapM
<*> readSTRef pfstM
<*> readSTRef plstM
<*> readSTRef pcurM
<*> readSTRef psliM
<*> U.unsafeFreeze mutaM
<*> U.unsafeFreeze mvecM
<*> U.unsafeFreeze pvecM
data SalisState = SalisState
{ iters :: Int
, syncs :: Int
, cores :: V.Vector CoreState
}
new :: Word64 -> SalisState
new s = SalisState 0 0 $ V.fromList $ map coreInit $ mutaInit s
step :: Int -> SalisState -> SalisState
step n s@SalisState {iters} = stepAndSync (syncInterval - iters `mod` syncInterval) n s
stepAndSync :: Int -> Int -> SalisState -> SalisState
stepAndSync d n =
if n >= d
then stepAndSync syncInterval (n - d) . sync . stepCores d
else stepCores n
stepCores :: Int -> SalisState -> SalisState
stepCores n s@SalisState {iters, cores} = s {iters = n + iters, cores = runPar $ parMap (coreCycle n) cores}
sync :: SalisState -> SalisState
sync s@SalisState {syncs} = s {syncs = succ syncs}
|
