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{-# LANGUAGE BangPatterns, CPP, MagicHash #-}
module Main ( main ) where
import Data.Bits
import GHC.Int
import GHC.Prim
import GHC.Word
import Data.Int
import Data.Word
#include "MachDeps.h"
main = putStr
( test_pdep ++ "\n"
++ test_pdep8 ++ "\n"
++ test_pdep16 ++ "\n"
++ test_pdep32 ++ "\n"
++ test_pdep64 ++ "\n"
++ "\n"
)
class Pdep a where
pdep :: a -> a -> a
instance Pdep Word where
pdep (W# src#) (W# mask#) = W# (pdep# src# mask#)
instance Pdep Word8 where
pdep (W8# src#) (W8# mask#) = W8# (pdep8# src# mask#)
instance Pdep Word16 where
pdep (W16# src#) (W16# mask#) = W16# (pdep16# src# mask#)
instance Pdep Word32 where
pdep (W32# src#) (W32# mask#) = W32# (pdep32# src# mask#)
instance Pdep Word64 where
pdep (W64# src#) (W64# mask#) = W64# (pdep64# src# mask#)
class SlowPdep a where
slowPdep :: a -> a -> a
instance SlowPdep Word where
slowPdep s m = fromIntegral (slowPdep64 (fromIntegral s) (fromIntegral m))
instance SlowPdep Word8 where
slowPdep s m = fromIntegral (slowPdep64 (fromIntegral s) (fromIntegral m))
instance SlowPdep Word16 where
slowPdep s m = fromIntegral (slowPdep64 (fromIntegral s) (fromIntegral m))
instance SlowPdep Word32 where
slowPdep s m = fromIntegral (slowPdep64 (fromIntegral s) (fromIntegral m))
instance SlowPdep Word64 where
slowPdep s m = fromIntegral (slowPdep64 (fromIntegral s) (fromIntegral m))
slowPdep64 :: Word64 -> Word64 -> Word64
slowPdep64 = slowPdep64' 0
slowPdep32 :: Word32 -> Word32 -> Word32
slowPdep32 s m = fromIntegral (slowPdep64 (fromIntegral s) (fromIntegral m))
lsb :: Word64 -> Word64
lsb src = fromIntegral ((fromIntegral (src `shiftL` 63) :: Int64) `shiftR` 63)
slowPdep64' :: Word64 -> Word64 -> Word64 -> Word64
slowPdep64' result src mask = if lowest /= 0
then slowPdep64' newResult (src `shiftR` 1) (mask .&. complement lowest)
else result
where lowest = (-mask) .&. mask
newResult = (result .|. ((lsb src) .&. lowest))
test_pdep = test (0 :: Word ) pdep slowPdep
test_pdep8 = test (0 :: Word8 ) pdep slowPdep
test_pdep16 = test (0 :: Word16) pdep slowPdep
test_pdep32 = test (0 :: Word32) pdep slowPdep
test_pdep64 = test (0 :: Word64) pdep slowPdep
mask n = (2 ^ n) - 1
fst4 :: (a, b, c, d) -> a
fst4 (a, _, _, _) = a
runCase :: Eq a
=> (a -> a -> a)
-> (a -> a -> a)
-> (a, a)
-> (Bool, a, a, (a, a))
runCase fast slow (x, y) = (slow x y == fast x y, slow x y, fast x y, (x, y))
test :: (Show a, Num a, Eq a) => a -> (a -> a -> a) -> (a -> a -> a) -> String
test _ fast slow = case failing of
[] -> "OK"
((_, e, a, i):xs) ->
"FAIL\n" ++ " Input: " ++ show i ++ "\nExpected: " ++ show e ++
"\n Actual: " ++ show a
where failing = dropWhile fst4 . map (runCase fast slow) $ cases
cases = (,) <$> numbers <*> numbers
-- 10 random numbers
#if SIZEOF_HSWORD == 4
numbers = [ 1480294021, 1626858410, 2316287658, 1246556957, 3806579062
, 65945563 , 1521588071, 791321966 , 1355466914, 2284998160
]
#elif SIZEOF_HSWORD == 8
numbers = [ 11004539497957619752, 5625461252166958202
, 1799960778872209546 , 16979826074020750638
, 12789915432197771481, 11680809699809094550
, 13208678822802632247, 13794454868797172383
, 13364728999716654549, 17516539991479925226
]
#else
# error Unexpected word size
#endif
|
