{-# LANGUAGE OverloadedStrings #-}

module Data.Succinct.Simd.ComparisonSpec (spec) where

import Control.Lens
import Control.Monad
import Data.Word
import Data.Succinct.Simd.Capabilities
import HaskellWorks.Hspec.Hedgehog
import Hedgehog
import Test.Hspec

import qualified Data.Succinct.Simd.Comparison.Avx2  as AVX
import qualified Data.Succinct.Simd.Comparison.Stock as STK
import qualified Data.Vector                         as DV
import qualified Data.Vector.Storable                as DVS
import qualified HaskellWorks.Hedgehog.Gen           as G
import qualified Hedgehog.Gen                        as G
import qualified Hedgehog.Range                      as R

{- HLINT ignore "Redundant do"        -}
{- HLINT ignore "Redundant bracket"   -}
{- HLINT ignore "Reduce duplication"  -}

spec :: Spec
spec = describe "Data.Succinct.Simd.ComparisonSpec" $ do
  when avx2Enabled $ do
    describe "cmpEqWord8s" $ do
      it "AVX2" $ requireProperty $ do
        w <- forAll $ G.word8 R.constantBounded
        vs :: [DVS.Vector Word64] <- forAll
          $ G.list (R.linear 0 5)
          $ (\g -> G.list (R.linear 0 4) g <&> join <&> DVS.fromList)
          $ G.list (R.linear 8 8)
          $ G.word8x8 (G.choice [pure w, G.word8 R.constantBounded])
        AVX.cmpEqWord8s w vs === STK.cmpEqWord8s w vs
        vs === vs
      it "AVX2 Para 1" $ requireProperty $ do
        w <- forAll $ G.word8 R.constantBounded
        vs :: DVS.Vector Word64 <- forAll
          $ G.storableVector (R.singleton 8)
          $ G.word8x8 (G.choice [pure w, G.word8 R.constantBounded])
        DV.head (AVX.cmpEqWord8sPara (DVS.singleton w) vs) === AVX.cmpEqWord8s w vs
      it "AVX2 Para 2" $ requireProperty $ do
        len <- forAll $ (* 8) <$> G.int (R.linear 0 8)
        w0  <- forAll $ G.word8 R.constantBounded
        w1  <- forAll $ G.word8 R.constantBounded
        vs :: DVS.Vector Word64 <- forAll
          $ G.storableVector (R.singleton len)
          $ G.word8x8 (G.choice [pure w0, pure w1, G.word8 R.constantBounded])
        let actual = AVX.cmpEqWord8sPara (DVS.fromList [w0, w1]) vs
        (actual DV.! 0) === AVX.cmpEqWord8s w0 vs
        (actual DV.! 1) === AVX.cmpEqWord8s w1 vs