1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
{-# LANGUAGE BangPatterns #-}
import Control.Loop (numLoop)
import Control.Monad
import Data.Word
import Test.Hspec
import qualified Data.ReinterpretCast as Current
import qualified Data.ReinterpretCast.Internal.ImplArray as Array
import qualified Data.ReinterpretCast.Internal.ImplFFI as FFI
-- Keep comparing against the data-binary-ieee754 package in case that changes.
import qualified Data.Binary.IEEE754 as IEEE
main :: IO ()
main = hspec $ do
describe "Current" $ do
it "wordToFloat" $ do
Current.wordToFloat 1 `shouldBe` 1.0e-45
describe "exhaustive testing (~ 2 minutes per test)" $ do
it "Word32 / float" $ do
numLoop 0 (maxBound :: Word32) $ \w ->
when (Current.floatToWord (Current.wordToFloat w) /= w) $
expectationFailure $ "Failed: " ++ show w
describe "Comparing implementations" $ do
let n32 = 1000000 :: Word32
it ("[0.." ++ show n32 ++ "] Word32 / float") $ do
numLoop 0 n32 $ \w -> do
let f = IEEE.wordToFloat w
when (f /= Current.wordToFloat w) $ expectationFailure $ "Current failed: " ++ show w
when (f /= Array.wordToFloat w) $ expectationFailure $ "Array failed: " ++ show w
when (f /= FFI.wordToFloat w) $ expectationFailure $ "FFI failed: " ++ show w
let n64 = 1000000 :: Word64
it ("[0.." ++ show n64 ++ "] Word64 / double") $ do
numLoop 0 n64 $ \w -> do
let f = IEEE.wordToDouble w
when (f /= Current.wordToDouble w) $ expectationFailure $ "Current failed: " ++ show w
when (f /= Array.wordToDouble w) $ expectationFailure $ "Array failed: " ++ show w
when (f /= FFI.wordToDouble w) $ expectationFailure $ "FFI failed: " ++ show w
|
