1 files changed, 12 insertions, 2 deletions

diff --git a/packages/base/src/Data/Packed/Internal/Numeric.hs b/packages/base/src/Data/Packed/Internal/Numeric.hs
index 354863f..2e36de2 100644
--- a/packages/base/src/Data/Packed/Internal/Numeric.hs
+++ b/packages/base/src/Data/Packed/Internal/Numeric.hs
@@ -50,7 +50,7 @@ import Data.Packed.Development
 import Numeric.Vectorized
 import Data.Complex
 
-import Numeric.LinearAlgebra.LAPACK(multiplyR,multiplyC,multiplyF,multiplyQ)
+import Numeric.LinearAlgebra.LAPACK(multiplyR,multiplyC,multiplyF,multiplyQ,multiplyI)
 import Data.Packed.Internal
 import Foreign.C.Types(CInt)
 import Text.Printf(printf)
@@ -540,7 +540,7 @@ class (Num e, Element e) => Product e where
     -- | sum of absolute value of elements
     norm1      :: Vector e -> RealOf e
     -- | euclidean norm
-    norm2      :: Vector e -> RealOf e
+    norm2      :: Floating e => Vector e -> RealOf e
     -- | element of maximum magnitude
     normInf    :: Vector e -> RealOf e
 
@@ -572,6 +572,14 @@ instance Product (Complex Double) where
     normInf    = emptyVal (maxElement . fst . fromComplex . vectorMapC Abs)
     multiply   = emptyMul multiplyC
 
+instance Product CInt where
+    norm2      = undefined
+--    absSum     = emptyVal (toScalarF AbsSum)
+--    norm1      = emptyVal (toScalarF AbsSum)
+--    normInf    = emptyVal (maxElement . vectorMapF Abs)
+    multiply   = emptyMul multiplyI
+
+
 emptyMul m a b
     | x1 == 0 && x2 == 0 || r == 0 || c == 0 = konst' 0 (r,c)
     | otherwise = m a b
@@ -706,6 +714,8 @@ type instance RealOf (Complex Double) = Double
 type instance RealOf Float = Float
 type instance RealOf (Complex Float) = Float
 
+type instance RealOf CInt = CInt
+
 type family ComplexOf x
 
 type instance ComplexOf Double = Complex Double