diff --git a/gitignore b/gitignore
new file mode 100644
index 0000000..eeb8a6e
--- /dev/null
+++ b/gitignore
@@ -0,0 +1 @@
+**/__pycache__
diff --git a/haskell-clash b/haskell-clash
deleted file mode 160000
index 1e72632..0000000
--- a/haskell-clash
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 1e7263237368e6322727792530b34dedfc871756
diff --git a/haskell-clash/MAC.hi b/haskell-clash/MAC.hi
new file mode 100644
index 0000000..1e6df1d
Binary files /dev/null and b/haskell-clash/MAC.hi differ
diff --git a/haskell-clash/MAC.hs b/haskell-clash/MAC.hs
new file mode 100644
index 0000000..0253e67
--- /dev/null
+++ b/haskell-clash/MAC.hs
@@ -0,0 +1,18 @@
+module MAC where
+
+import Clash.Prelude
+import Clash.Explicit.Testbench
+
+mac :: (Num a) => a -> (a, a) -> (a, a)
+mac acc (x, y) = (acc + x * y, acc)
+
+macS :: (HiddenClockResetEnable dom, Num a, NFDataX a) => Signal dom (a, a) -> Signal dom a
+macS = mealy mac 0
+
+topEntity
+  :: Clock System
+  -> Reset System
+  -> Enable System
+  -> Signal System (Int, Int)
+  -> Signal System Int
+topEntity = exposeClockResetEnable macS
diff --git a/haskell-clash/MAC.o b/haskell-clash/MAC.o
new file mode 100644
index 0000000..42790ec
Binary files /dev/null and b/haskell-clash/MAC.o differ
diff --git a/haskell-clash/Main.hs b/haskell-clash/Main.hs
new file mode 100644
index 0000000..32c6330
--- /dev/null
+++ b/haskell-clash/Main.hs
@@ -0,0 +1,7 @@
+module Main where
+
+import HaskellSay (haskellSay)
+
+main :: IO ()
+main =
+  haskellSay "Hello, Haskell! You're using a function from another package!"
diff --git a/haskell-clash/cabal.project b/haskell-clash/cabal.project
new file mode 100644
index 0000000..5b01f13
--- /dev/null
+++ b/haskell-clash/cabal.project
@@ -0,0 +1,5 @@
+packages:
+  ./
+
+package clash-test
+  tests: True
diff --git a/haskell-clash/clash-only-shell.nix b/haskell-clash/clash-only-shell.nix
new file mode 100644
index 0000000..988e36b
--- /dev/null
+++ b/haskell-clash/clash-only-shell.nix
@@ -0,0 +1,16 @@
+{ pkgs ?  import <nixos> {} }:
+let
+  unstable = import (fetchTarball https://github.com/NixOS/nixpkgs-channels/archive/nixos-unstable.tar.gz) {};
+in pkgs.mkShell {
+  name = "clash-compiler-shell";
+  buildInputs = with unstable.haskellPackages; [
+    (ghcWithPackages (p: with p; [
+      clash-ghc
+
+      ghc-typelits-extra
+      ghc-typelits-knownnat
+      ghc-typelits-natnormalise
+    ])
+    )
+  ];
+}
diff --git a/haskell-clash/clash-test.cabal b/haskell-clash/clash-test.cabal
new file mode 100644
index 0000000..bc1f796
--- /dev/null
+++ b/haskell-clash/clash-test.cabal
@@ -0,0 +1,71 @@
+cabal-version:   2.4
+name:            clash-test
+version:         0
+license:         BSD-3-Clause
+build-type:      Simple
+license-file:    LICENSE
+author:          harris-chris
+maintainer:      harris-chris <chrisharriscjh@gmail.com>
+copyright:       2021 harris-chris
+tested-with:     GHC ==8.6.3 || ==8.8.3 || ==8.10.5
+extra-doc-files:
+  CHANGELOG.md
+  README.md
+
+-- category:
+-- description:     description
+-- synopsis:        one-line synopsis
+-- homepage:        https://github.com/FIXME/haskell-nix-test#readme
+-- source-repository head
+--   type:     git
+--   location: git://github.com/FIXME/haskell-nix-test.git
+
+common common-options
+  build-depends:    
+    base >=4.9 && <5
+    --clash-ghc >= 1.4.3
+  default-language: Haskell2010
+  ghc-options:
+    -Wall -Wcompat -Widentities -Wincomplete-uni-patterns
+    -Wincomplete-record-updates -Wredundant-constraints
+    -fhide-source-paths -Wpartial-fields
+
+--library
+  --import:          common-options
+  --hs-source-dirs:  src
+  --exposed-modules: Lib
+  --build-depends:
+    --, containers
+    --, mtl
+
+executable haskell-nix-test-exe
+  import:         common-options
+  hs-source-dirs: ., app
+  main-is:        Main.hs
+  build-depends: 
+    haskell-say ^>=1.0.0.0
+  ghc-options:    -threaded -rtsopts -with-rtsopts=-N
+
+--test-suite haskell-nix-test-test
+  --import:         common-options
+  --type:           exitcode-stdio-1.0
+  --hs-source-dirs: test
+  --main-is:        Spec.hs
+  --build-depends:
+    --, hspec
+    --, HUnit
+    --, haskell-nix-test
+    --, QuickCheck
+
+  --ghc-options:    -threaded -rtsopts -with-rtsopts=-N
+
+--benchmark haskell-nix-test-bench
+  --import:         common-options
+  --type:           exitcode-stdio-1.0
+  --hs-source-dirs: bench
+  --main-is:        Main.hs
+  --build-depends:
+    --, criterion
+    --, haskell-nix-test
+
+  --ghc-options:    -threaded -rtsopts -with-rtsopts=-N
diff --git a/haskell-clash/default.nix b/haskell-clash/default.nix
new file mode 100644
index 0000000..1973a0e
--- /dev/null
+++ b/haskell-clash/default.nix
@@ -0,0 +1,30 @@
+let
+  # Read in the Niv sources
+  sources = import ./nix/sources.nix {};
+  # If ./nix/sources.nix file is not found run:
+  #   niv init
+  #   niv add input-output-hk/haskell.nix -n haskellNix
+
+  # Fetch the haskell.nix commit we have pinned with Niv
+  haskellNix = import sources.haskellNix {};
+  # If haskellNix is not found run:
+  #   niv add input-output-hk/haskell.nix -n haskellNix
+
+  # Import nixpkgs and pass the haskell.nix provided nixpkgsArgs
+  pkgs = import
+    # haskell.nix provides access to the nixpkgs pins which are used by our CI,
+    # hence you will be more likely to get cache hits when using these.
+    # But you can also just use your own, e.g. '<nixpkgs>'.
+    haskellNix.sources.nixpkgs-2009
+    # These arguments passed to nixpkgs, include some patches and also
+    # the haskell.nix functionality itself as an overlay.
+    haskellNix.nixpkgsArgs;
+in pkgs.haskell-nix.project {
+  # 'cleanGit' cleans a source directory based on the files known by git
+  src = pkgs.haskell-nix.haskellLib.cleanGit {
+    name = "haskell-nix-test";
+    src = ./.;
+  };
+  # Specify the GHC version to use.
+  compiler-nix-name = "ghc8102"; # Not required for `stack.yaml` based projects.
+}
diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/build/autogen/Paths_haskell_nix_test.hs b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/build/autogen/Paths_haskell_nix_test.hs
new file mode 100644
index 0000000..2384cc4
--- /dev/null
+++ b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/build/autogen/Paths_haskell_nix_test.hs
@@ -0,0 +1,50 @@
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE NoRebindableSyntax #-}
+{-# OPTIONS_GHC -fno-warn-missing-import-lists #-}
+module Paths_haskell_nix_test (
+    version,
+    getBinDir, getLibDir, getDynLibDir, getDataDir, getLibexecDir,
+    getDataFileName, getSysconfDir
+  ) where
+
+import qualified Control.Exception as Exception
+import Data.Version (Version(..))
+import System.Environment (getEnv)
+import Prelude
+
+#if defined(VERSION_base)
+
+#if MIN_VERSION_base(4,0,0)
+catchIO :: IO a -> (Exception.IOException -> IO a) -> IO a
+#else
+catchIO :: IO a -> (Exception.Exception -> IO a) -> IO a
+#endif
+
+#else
+catchIO :: IO a -> (Exception.IOException -> IO a) -> IO a
+#endif
+catchIO = Exception.catch
+
+version :: Version
+version = Version [0] []
+bindir, libdir, dynlibdir, datadir, libexecdir, sysconfdir :: FilePath
+
+bindir     = "/home/chris/.cabal/bin"
+libdir     = "/home/chris/.cabal/lib/x86_64-linux-ghc-8.10.2/haskell-nix-test-0-inplace"
+dynlibdir  = "/home/chris/.cabal/lib/x86_64-linux-ghc-8.10.2"
+datadir    = "/home/chris/.cabal/share/x86_64-linux-ghc-8.10.2/haskell-nix-test-0"
+libexecdir = "/home/chris/.cabal/libexec/x86_64-linux-ghc-8.10.2/haskell-nix-test-0"
+sysconfdir = "/home/chris/.cabal/etc"
+
+getBinDir, getLibDir, getDynLibDir, getDataDir, getLibexecDir, getSysconfDir :: IO FilePath
+getBinDir = catchIO (getEnv "haskell_nix_test_bindir") (\_ -> return bindir)
+getLibDir = catchIO (getEnv "haskell_nix_test_libdir") (\_ -> return libdir)
+getDynLibDir = catchIO (getEnv "haskell_nix_test_dynlibdir") (\_ -> return dynlibdir)
+getDataDir = catchIO (getEnv "haskell_nix_test_datadir") (\_ -> return datadir)
+getLibexecDir = catchIO (getEnv "haskell_nix_test_libexecdir") (\_ -> return libexecdir)
+getSysconfDir = catchIO (getEnv "haskell_nix_test_sysconfdir") (\_ -> return sysconfdir)
+
+getDataFileName :: FilePath -> IO FilePath
+getDataFileName name = do
+  dir <- getDataDir
+  return (dir ++ "/" ++ name)
diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/build/autogen/cabal_macros.h b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/build/autogen/cabal_macros.h
new file mode 100644
index 0000000..0557116
--- /dev/null
+++ b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/build/autogen/cabal_macros.h
@@ -0,0 +1,143 @@
+/* DO NOT EDIT: This file is automatically generated by Cabal */
+
+/* package haskell-nix-test-0 */
+#ifndef VERSION_haskell_nix_test
+#define VERSION_haskell_nix_test "0"
+#endif /* VERSION_haskell_nix_test */
+#ifndef MIN_VERSION_haskell_nix_test
+#define MIN_VERSION_haskell_nix_test(major1,major2,minor) (\
+  (major1) <  0 || \
+  (major1) == 0 && (major2) <  0 || \
+  (major1) == 0 && (major2) == 0 && (minor) <= 0)
+#endif /* MIN_VERSION_haskell_nix_test */
+
+/* package base-4.14.1.0 */
+#ifndef VERSION_base
+#define VERSION_base "4.14.1.0"
+#endif /* VERSION_base */
+#ifndef MIN_VERSION_base
+#define MIN_VERSION_base(major1,major2,minor) (\
+  (major1) <  4 || \
+  (major1) == 4 && (major2) <  14 || \
+  (major1) == 4 && (major2) == 14 && (minor) <= 1)
+#endif /* MIN_VERSION_base */
+
+/* package containers-0.6.2.1 */
+#ifndef VERSION_containers
+#define VERSION_containers "0.6.2.1"
+#endif /* VERSION_containers */
+#ifndef MIN_VERSION_containers
+#define MIN_VERSION_containers(major1,major2,minor) (\
+  (major1) <  0 || \
+  (major1) == 0 && (major2) <  6 || \
+  (major1) == 0 && (major2) == 6 && (minor) <= 2)
+#endif /* MIN_VERSION_containers */
+
+/* package mtl-2.2.2 */
+#ifndef VERSION_mtl
+#define VERSION_mtl "2.2.2"
+#endif /* VERSION_mtl */
+#ifndef MIN_VERSION_mtl
+#define MIN_VERSION_mtl(major1,major2,minor) (\
+  (major1) <  2 || \
+  (major1) == 2 && (major2) <  2 || \
+  (major1) == 2 && (major2) == 2 && (minor) <= 2)
+#endif /* MIN_VERSION_mtl */
+
+/* tool gcc-9.3.0 */
+#ifndef TOOL_VERSION_gcc
+#define TOOL_VERSION_gcc "9.3.0"
+#endif /* TOOL_VERSION_gcc */
+#ifndef MIN_TOOL_VERSION_gcc
+#define MIN_TOOL_VERSION_gcc(major1,major2,minor) (\
+  (major1) <  9 || \
+  (major1) == 9 && (major2) <  3 || \
+  (major1) == 9 && (major2) == 3 && (minor) <= 0)
+#endif /* MIN_TOOL_VERSION_gcc */
+
+/* tool ghc-8.10.2 */
+#ifndef TOOL_VERSION_ghc
+#define TOOL_VERSION_ghc "8.10.2"
+#endif /* TOOL_VERSION_ghc */
+#ifndef MIN_TOOL_VERSION_ghc
+#define MIN_TOOL_VERSION_ghc(major1,major2,minor) (\
+  (major1) <  8 || \
+  (major1) == 8 && (major2) <  10 || \
+  (major1) == 8 && (major2) == 10 && (minor) <= 2)
+#endif /* MIN_TOOL_VERSION_ghc */
+
+/* tool ghc-pkg-8.10.2 */
+#ifndef TOOL_VERSION_ghc_pkg
+#define TOOL_VERSION_ghc_pkg "8.10.2"
+#endif /* TOOL_VERSION_ghc_pkg */
+#ifndef MIN_TOOL_VERSION_ghc_pkg
+#define MIN_TOOL_VERSION_ghc_pkg(major1,major2,minor) (\
+  (major1) <  8 || \
+  (major1) == 8 && (major2) <  10 || \
+  (major1) == 8 && (major2) == 10 && (minor) <= 2)
+#endif /* MIN_TOOL_VERSION_ghc_pkg */
+
+/* tool haddock-2.24.0 */
+#ifndef TOOL_VERSION_haddock
+#define TOOL_VERSION_haddock "2.24.0"
+#endif /* TOOL_VERSION_haddock */
+#ifndef MIN_TOOL_VERSION_haddock
+#define MIN_TOOL_VERSION_haddock(major1,major2,minor) (\
+  (major1) <  2 || \
+  (major1) == 2 && (major2) <  24 || \
+  (major1) == 2 && (major2) == 24 && (minor) <= 0)
+#endif /* MIN_TOOL_VERSION_haddock */
+
+/* tool hpc-0.68 */
+#ifndef TOOL_VERSION_hpc
+#define TOOL_VERSION_hpc "0.68"
+#endif /* TOOL_VERSION_hpc */
+#ifndef MIN_TOOL_VERSION_hpc
+#define MIN_TOOL_VERSION_hpc(major1,major2,minor) (\
+  (major1) <  0 || \
+  (major1) == 0 && (major2) <  68 || \
+  (major1) == 0 && (major2) == 68 && (minor) <= 0)
+#endif /* MIN_TOOL_VERSION_hpc */
+
+/* tool hsc2hs-0.68.7 */
+#ifndef TOOL_VERSION_hsc2hs
+#define TOOL_VERSION_hsc2hs "0.68.7"
+#endif /* TOOL_VERSION_hsc2hs */
+#ifndef MIN_TOOL_VERSION_hsc2hs
+#define MIN_TOOL_VERSION_hsc2hs(major1,major2,minor) (\
+  (major1) <  0 || \
+  (major1) == 0 && (major2) <  68 || \
+  (major1) == 0 && (major2) == 68 && (minor) <= 7)
+#endif /* MIN_TOOL_VERSION_hsc2hs */
+
+/* tool runghc-8.10.2 */
+#ifndef TOOL_VERSION_runghc
+#define TOOL_VERSION_runghc "8.10.2"
+#endif /* TOOL_VERSION_runghc */
+#ifndef MIN_TOOL_VERSION_runghc
+#define MIN_TOOL_VERSION_runghc(major1,major2,minor) (\
+  (major1) <  8 || \
+  (major1) == 8 && (major2) <  10 || \
+  (major1) == 8 && (major2) == 10 && (minor) <= 2)
+#endif /* MIN_TOOL_VERSION_runghc */
+
+/* tool strip-2.31 */
+#ifndef TOOL_VERSION_strip
+#define TOOL_VERSION_strip "2.31"
+#endif /* TOOL_VERSION_strip */
+#ifndef MIN_TOOL_VERSION_strip
+#define MIN_TOOL_VERSION_strip(major1,major2,minor) (\
+  (major1) <  2 || \
+  (major1) == 2 && (major2) <  31 || \
+  (major1) == 2 && (major2) == 31 && (minor) <= 0)
+#endif /* MIN_TOOL_VERSION_strip */
+
+#ifndef CURRENT_PACKAGE_KEY
+#define CURRENT_PACKAGE_KEY "haskell-nix-test-0-inplace"
+#endif /* CURRENT_PACKAGE_KEY */
+#ifndef CURRENT_COMPONENT_ID
+#define CURRENT_COMPONENT_ID "haskell-nix-test-0-inplace"
+#endif /* CURRENT_COMPONENT_ID */
+#ifndef CURRENT_PACKAGE_VERSION
+#define CURRENT_PACKAGE_VERSION "0"
+#endif /* CURRENT_PACKAGE_VERSION */
diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/cache/config b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/cache/config
new file mode 100644
index 0000000..719bc68
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diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/package.conf.inplace/package.cache b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/package.conf.inplace/package.cache
new file mode 100644
index 0000000..b3cae5c
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diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/package.conf.inplace/package.cache.lock b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/package.conf.inplace/package.cache.lock
new file mode 100644
index 0000000..e69de29
diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/setup-config b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/setup-config
new file mode 100644
index 0000000..57e31d0
Binary files /dev/null and b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/setup-config differ
diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/autogen/Paths_haskell_nix_test.hs b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/autogen/Paths_haskell_nix_test.hs
new file mode 100644
index 0000000..a66bfa4
--- /dev/null
+++ b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/autogen/Paths_haskell_nix_test.hs
@@ -0,0 +1,50 @@
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE NoRebindableSyntax #-}
+{-# OPTIONS_GHC -fno-warn-missing-import-lists #-}
+module Paths_haskell_nix_test (
+    version,
+    getBinDir, getLibDir, getDynLibDir, getDataDir, getLibexecDir,
+    getDataFileName, getSysconfDir
+  ) where
+
+import qualified Control.Exception as Exception
+import Data.Version (Version(..))
+import System.Environment (getEnv)
+import Prelude
+
+#if defined(VERSION_base)
+
+#if MIN_VERSION_base(4,0,0)
+catchIO :: IO a -> (Exception.IOException -> IO a) -> IO a
+#else
+catchIO :: IO a -> (Exception.Exception -> IO a) -> IO a
+#endif
+
+#else
+catchIO :: IO a -> (Exception.IOException -> IO a) -> IO a
+#endif
+catchIO = Exception.catch
+
+version :: Version
+version = Version [0] []
+bindir, libdir, dynlibdir, datadir, libexecdir, sysconfdir :: FilePath
+
+bindir     = "/home/chris/.cabal/bin"
+libdir     = "/home/chris/.cabal/lib/x86_64-linux-ghc-8.10.2/haskell-nix-test-0-inplace-haskell-nix-test-exe"
+dynlibdir  = "/home/chris/.cabal/lib/x86_64-linux-ghc-8.10.2"
+datadir    = "/home/chris/.cabal/share/x86_64-linux-ghc-8.10.2/haskell-nix-test-0"
+libexecdir = "/home/chris/.cabal/libexec/x86_64-linux-ghc-8.10.2/haskell-nix-test-0"
+sysconfdir = "/home/chris/.cabal/etc"
+
+getBinDir, getLibDir, getDynLibDir, getDataDir, getLibexecDir, getSysconfDir :: IO FilePath
+getBinDir = catchIO (getEnv "haskell_nix_test_bindir") (\_ -> return bindir)
+getLibDir = catchIO (getEnv "haskell_nix_test_libdir") (\_ -> return libdir)
+getDynLibDir = catchIO (getEnv "haskell_nix_test_dynlibdir") (\_ -> return dynlibdir)
+getDataDir = catchIO (getEnv "haskell_nix_test_datadir") (\_ -> return datadir)
+getLibexecDir = catchIO (getEnv "haskell_nix_test_libexecdir") (\_ -> return libexecdir)
+getSysconfDir = catchIO (getEnv "haskell_nix_test_sysconfdir") (\_ -> return sysconfdir)
+
+getDataFileName :: FilePath -> IO FilePath
+getDataFileName name = do
+  dir <- getDataDir
+  return (dir ++ "/" ++ name)
diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/autogen/cabal_macros.h b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/autogen/cabal_macros.h
new file mode 100644
index 0000000..d3c91c6
--- /dev/null
+++ b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/autogen/cabal_macros.h
@@ -0,0 +1,129 @@
+/* DO NOT EDIT: This file is automatically generated by Cabal */
+
+/* package haskell-nix-test-0 */
+#ifndef VERSION_haskell_nix_test
+#define VERSION_haskell_nix_test "0"
+#endif /* VERSION_haskell_nix_test */
+#ifndef MIN_VERSION_haskell_nix_test
+#define MIN_VERSION_haskell_nix_test(major1,major2,minor) (\
+  (major1) <  0 || \
+  (major1) == 0 && (major2) <  0 || \
+  (major1) == 0 && (major2) == 0 && (minor) <= 0)
+#endif /* MIN_VERSION_haskell_nix_test */
+
+/* package base-4.14.1.0 */
+#ifndef VERSION_base
+#define VERSION_base "4.14.1.0"
+#endif /* VERSION_base */
+#ifndef MIN_VERSION_base
+#define MIN_VERSION_base(major1,major2,minor) (\
+  (major1) <  4 || \
+  (major1) == 4 && (major2) <  14 || \
+  (major1) == 4 && (major2) == 14 && (minor) <= 1)
+#endif /* MIN_VERSION_base */
+
+/* package haskell-say-1.0.0.0 */
+#ifndef VERSION_haskell_say
+#define VERSION_haskell_say "1.0.0.0"
+#endif /* VERSION_haskell_say */
+#ifndef MIN_VERSION_haskell_say
+#define MIN_VERSION_haskell_say(major1,major2,minor) (\
+  (major1) <  1 || \
+  (major1) == 1 && (major2) <  0 || \
+  (major1) == 1 && (major2) == 0 && (minor) <= 0)
+#endif /* MIN_VERSION_haskell_say */
+
+/* tool gcc-9.3.0 */
+#ifndef TOOL_VERSION_gcc
+#define TOOL_VERSION_gcc "9.3.0"
+#endif /* TOOL_VERSION_gcc */
+#ifndef MIN_TOOL_VERSION_gcc
+#define MIN_TOOL_VERSION_gcc(major1,major2,minor) (\
+  (major1) <  9 || \
+  (major1) == 9 && (major2) <  3 || \
+  (major1) == 9 && (major2) == 3 && (minor) <= 0)
+#endif /* MIN_TOOL_VERSION_gcc */
+
+/* tool ghc-8.10.2 */
+#ifndef TOOL_VERSION_ghc
+#define TOOL_VERSION_ghc "8.10.2"
+#endif /* TOOL_VERSION_ghc */
+#ifndef MIN_TOOL_VERSION_ghc
+#define MIN_TOOL_VERSION_ghc(major1,major2,minor) (\
+  (major1) <  8 || \
+  (major1) == 8 && (major2) <  10 || \
+  (major1) == 8 && (major2) == 10 && (minor) <= 2)
+#endif /* MIN_TOOL_VERSION_ghc */
+
+/* tool ghc-pkg-8.10.2 */
+#ifndef TOOL_VERSION_ghc_pkg
+#define TOOL_VERSION_ghc_pkg "8.10.2"
+#endif /* TOOL_VERSION_ghc_pkg */
+#ifndef MIN_TOOL_VERSION_ghc_pkg
+#define MIN_TOOL_VERSION_ghc_pkg(major1,major2,minor) (\
+  (major1) <  8 || \
+  (major1) == 8 && (major2) <  10 || \
+  (major1) == 8 && (major2) == 10 && (minor) <= 2)
+#endif /* MIN_TOOL_VERSION_ghc_pkg */
+
+/* tool haddock-2.24.0 */
+#ifndef TOOL_VERSION_haddock
+#define TOOL_VERSION_haddock "2.24.0"
+#endif /* TOOL_VERSION_haddock */
+#ifndef MIN_TOOL_VERSION_haddock
+#define MIN_TOOL_VERSION_haddock(major1,major2,minor) (\
+  (major1) <  2 || \
+  (major1) == 2 && (major2) <  24 || \
+  (major1) == 2 && (major2) == 24 && (minor) <= 0)
+#endif /* MIN_TOOL_VERSION_haddock */
+
+/* tool hpc-0.68 */
+#ifndef TOOL_VERSION_hpc
+#define TOOL_VERSION_hpc "0.68"
+#endif /* TOOL_VERSION_hpc */
+#ifndef MIN_TOOL_VERSION_hpc
+#define MIN_TOOL_VERSION_hpc(major1,major2,minor) (\
+  (major1) <  0 || \
+  (major1) == 0 && (major2) <  68 || \
+  (major1) == 0 && (major2) == 68 && (minor) <= 0)
+#endif /* MIN_TOOL_VERSION_hpc */
+
+/* tool hsc2hs-0.68.7 */
+#ifndef TOOL_VERSION_hsc2hs
+#define TOOL_VERSION_hsc2hs "0.68.7"
+#endif /* TOOL_VERSION_hsc2hs */
+#ifndef MIN_TOOL_VERSION_hsc2hs
+#define MIN_TOOL_VERSION_hsc2hs(major1,major2,minor) (\
+  (major1) <  0 || \
+  (major1) == 0 && (major2) <  68 || \
+  (major1) == 0 && (major2) == 68 && (minor) <= 7)
+#endif /* MIN_TOOL_VERSION_hsc2hs */
+
+/* tool runghc-8.10.2 */
+#ifndef TOOL_VERSION_runghc
+#define TOOL_VERSION_runghc "8.10.2"
+#endif /* TOOL_VERSION_runghc */
+#ifndef MIN_TOOL_VERSION_runghc
+#define MIN_TOOL_VERSION_runghc(major1,major2,minor) (\
+  (major1) <  8 || \
+  (major1) == 8 && (major2) <  10 || \
+  (major1) == 8 && (major2) == 10 && (minor) <= 2)
+#endif /* MIN_TOOL_VERSION_runghc */
+
+/* tool strip-2.31 */
+#ifndef TOOL_VERSION_strip
+#define TOOL_VERSION_strip "2.31"
+#endif /* TOOL_VERSION_strip */
+#ifndef MIN_TOOL_VERSION_strip
+#define MIN_TOOL_VERSION_strip(major1,major2,minor) (\
+  (major1) <  2 || \
+  (major1) == 2 && (major2) <  31 || \
+  (major1) == 2 && (major2) == 31 && (minor) <= 0)
+#endif /* MIN_TOOL_VERSION_strip */
+
+#ifndef CURRENT_COMPONENT_ID
+#define CURRENT_COMPONENT_ID "haskell-nix-test-0-inplace-haskell-nix-test-exe"
+#endif /* CURRENT_COMPONENT_ID */
+#ifndef CURRENT_PACKAGE_VERSION
+#define CURRENT_PACKAGE_VERSION "0"
+#endif /* CURRENT_PACKAGE_VERSION */
diff --git a/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/haskell-nix-test-exe b/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/haskell-nix-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/haskell-nix-test-exe
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diff --git a/haskell-clash/dist-newstyle/cache/elaborated-plan b/haskell-clash/dist-newstyle/cache/elaborated-plan
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diff --git a/haskell-clash/dist-newstyle/cache/plan.json b/haskell-clash/dist-newstyle/cache/plan.json
new file mode 100644
index 0000000..776992f
--- /dev/null
+++ b/haskell-clash/dist-newstyle/cache/plan.json
@@ -0,0 +1 @@
+{"cabal-version":"3.2.0.0","cabal-lib-version":"3.2.0.0","compiler-id":"ghc-8.10.2","os":"linux","arch":"x86_64","install-plan":[{"type":"pre-existing","id":"base-4.14.1.0","pkg-name":"base","pkg-version":"4.14.1.0","depends":["ghc-prim-0.6.1","integer-gmp-1.0.3.0","rts"]},{"type":"configured","id":"clash-test-0-inplace-haskell-nix-test-exe","pkg-name":"clash-test","pkg-version":"0","flags":{},"style":"local","pkg-src":{"type":"local","path":"/data/vap/haskell-clash/."},"dist-dir":"/data/vap/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/clash-test-0/x/haskell-nix-test-exe","depends":["base-4.14.1.0","haskell-say-1.0.0.0-BsVCBKZRGyjE3H8ATpwpU2"],"exe-depends":[],"component-name":"exe:haskell-nix-test-exe","bin-file":"/data/vap/haskell-clash/dist-newstyle/build/x86_64-linux/ghc-8.10.2/clash-test-0/x/haskell-nix-test-exe/build/haskell-nix-test-exe/haskell-nix-test-exe"},{"type":"pre-existing","id":"ghc-prim-0.6.1","pkg-name":"ghc-prim","pkg-version":"0.6.1","depends":["rts"]},{"type":"pre-existing","id":"haskell-say-1.0.0.0-BsVCBKZRGyjE3H8ATpwpU2","pkg-name":"haskell-say","pkg-version":"1.0.0.0","depends":["base-4.14.1.0"]},{"type":"pre-existing","id":"integer-gmp-1.0.3.0","pkg-name":"integer-gmp","pkg-version":"1.0.3.0","depends":["ghc-prim-0.6.1"]},{"type":"pre-existing","id":"rts","pkg-name":"rts","pkg-version":"1.0","depends":[]}]}
\ No newline at end of file
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diff --git a/haskell-clash/nix/sources.json b/haskell-clash/nix/sources.json
new file mode 100644
index 0000000..e4c2303
--- /dev/null
+++ b/haskell-clash/nix/sources.json
@@ -0,0 +1,50 @@
+{
+    "clash-compiler": {
+        "branch": "master",
+        "description": "Haskell to VHDL/Verilog/SystemVerilog compiler",
+        "homepage": "https://clash-lang.org/",
+        "owner": "clash-lang",
+        "repo": "clash-compiler",
+        "rev": "70b7b2ecb4647163d807a30072cc1faf922a3710",
+        "sha256": "0mg8gd9yispvvi7sk62rnqmp1x301564x88ivgk50mqz85247a8f",
+        "type": "tarball",
+        "url": "https://github.com/clash-lang/clash-compiler/archive/70b7b2ecb4647163d807a30072cc1faf922a3710.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "haskellNix": {
+        "branch": "master",
+        "description": "Alternative Haskell Infrastructure for Nixpkgs",
+        "homepage": "https://input-output-hk.github.io/haskell.nix",
+        "owner": "input-output-hk",
+        "repo": "haskell.nix",
+        "rev": "b0f217b5954e445d90ce4ac70cf82a62093052cd",
+        "sha256": "1gsl6c3bbsglrq5q86vnlyhi4k0l1nxm399h0kli8zzs76lfbkff",
+        "type": "tarball",
+        "url": "https://github.com/input-output-hk/haskell.nix/archive/b0f217b5954e445d90ce4ac70cf82a62093052cd.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "niv": {
+        "branch": "master",
+        "description": "Easy dependency management for Nix projects",
+        "homepage": "https://github.com/nmattia/niv",
+        "owner": "nmattia",
+        "repo": "niv",
+        "rev": "65a61b147f307d24bfd0a5cd56ce7d7b7cc61d2e",
+        "sha256": "17mirpsx5wyw262fpsd6n6m47jcgw8k2bwcp1iwdnrlzy4dhcgqh",
+        "type": "tarball",
+        "url": "https://github.com/nmattia/niv/archive/65a61b147f307d24bfd0a5cd56ce7d7b7cc61d2e.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
+    "nixpkgs": {
+        "branch": "release-20.03",
+        "description": "Nix Packages collection",
+        "homepage": "",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "eb73405ecceb1dc505b7cbbd234f8f94165e2696",
+        "sha256": "06k21wbyhhvq2f1xczszh3c2934p0m02by3l2ixvd6nkwrqklax7",
+        "type": "tarball",
+        "url": "https://github.com/NixOS/nixpkgs/archive/eb73405ecceb1dc505b7cbbd234f8f94165e2696.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    }
+}
diff --git a/haskell-clash/nix/sources.nix b/haskell-clash/nix/sources.nix
new file mode 100644
index 0000000..1938409
--- /dev/null
+++ b/haskell-clash/nix/sources.nix
@@ -0,0 +1,174 @@
+# This file has been generated by Niv.
+
+let
+
+  #
+  # The fetchers. fetch_<type> fetches specs of type <type>.
+  #
+
+  fetch_file = pkgs: name: spec:
+    let
+      name' = sanitizeName name + "-src";
+    in
+      if spec.builtin or true then
+        builtins_fetchurl { inherit (spec) url sha256; name = name'; }
+      else
+        pkgs.fetchurl { inherit (spec) url sha256; name = name'; };
+
+  fetch_tarball = pkgs: name: spec:
+    let
+      name' = sanitizeName name + "-src";
+    in
+      if spec.builtin or true then
+        builtins_fetchTarball { name = name'; inherit (spec) url sha256; }
+      else
+        pkgs.fetchzip { name = name'; inherit (spec) url sha256; };
+
+  fetch_git = name: spec:
+    let
+      ref =
+        if spec ? ref then spec.ref else
+          if spec ? branch then "refs/heads/${spec.branch}" else
+            if spec ? tag then "refs/tags/${spec.tag}" else
+              abort "In git source '${name}': Please specify `ref`, `tag` or `branch`!";
+    in
+      builtins.fetchGit { url = spec.repo; inherit (spec) rev; inherit ref; };
+
+  fetch_local = spec: spec.path;
+
+  fetch_builtin-tarball = name: throw
+    ''[${name}] The niv type "builtin-tarball" is deprecated. You should instead use `builtin = true`.
+        $ niv modify ${name} -a type=tarball -a builtin=true'';
+
+  fetch_builtin-url = name: throw
+    ''[${name}] The niv type "builtin-url" will soon be deprecated. You should instead use `builtin = true`.
+        $ niv modify ${name} -a type=file -a builtin=true'';
+
+  #
+  # Various helpers
+  #
+
+  # https://github.com/NixOS/nixpkgs/pull/83241/files#diff-c6f540a4f3bfa4b0e8b6bafd4cd54e8bR695
+  sanitizeName = name:
+    (
+      concatMapStrings (s: if builtins.isList s then "-" else s)
+        (
+          builtins.split "[^[:alnum:]+._?=-]+"
+            ((x: builtins.elemAt (builtins.match "\\.*(.*)" x) 0) name)
+        )
+    );
+
+  # The set of packages used when specs are fetched using non-builtins.
+  mkPkgs = sources: system:
+    let
+      sourcesNixpkgs =
+        import (builtins_fetchTarball { inherit (sources.nixpkgs) url sha256; }) { inherit system; };
+      hasNixpkgsPath = builtins.any (x: x.prefix == "nixpkgs") builtins.nixPath;
+      hasThisAsNixpkgsPath = <nixpkgs> == ./.;
+    in
+      if builtins.hasAttr "nixpkgs" sources
+      then sourcesNixpkgs
+      else if hasNixpkgsPath && ! hasThisAsNixpkgsPath then
+        import <nixpkgs> {}
+      else
+        abort
+          ''
+            Please specify either <nixpkgs> (through -I or NIX_PATH=nixpkgs=...) or
+            add a package called "nixpkgs" to your sources.json.
+          '';
+
+  # The actual fetching function.
+  fetch = pkgs: name: spec:
+
+    if ! builtins.hasAttr "type" spec then
+      abort "ERROR: niv spec ${name} does not have a 'type' attribute"
+    else if spec.type == "file" then fetch_file pkgs name spec
+    else if spec.type == "tarball" then fetch_tarball pkgs name spec
+    else if spec.type == "git" then fetch_git name spec
+    else if spec.type == "local" then fetch_local spec
+    else if spec.type == "builtin-tarball" then fetch_builtin-tarball name
+    else if spec.type == "builtin-url" then fetch_builtin-url name
+    else
+      abort "ERROR: niv spec ${name} has unknown type ${builtins.toJSON spec.type}";
+
+  # If the environment variable NIV_OVERRIDE_${name} is set, then use
+  # the path directly as opposed to the fetched source.
+  replace = name: drv:
+    let
+      saneName = stringAsChars (c: if isNull (builtins.match "[a-zA-Z0-9]" c) then "_" else c) name;
+      ersatz = builtins.getEnv "NIV_OVERRIDE_${saneName}";
+    in
+      if ersatz == "" then drv else
+        # this turns the string into an actual Nix path (for both absolute and
+        # relative paths)
+        if builtins.substring 0 1 ersatz == "/" then /. + ersatz else /. + builtins.getEnv "PWD" + "/${ersatz}";
+
+  # Ports of functions for older nix versions
+
+  # a Nix version of mapAttrs if the built-in doesn't exist
+  mapAttrs = builtins.mapAttrs or (
+    f: set: with builtins;
+    listToAttrs (map (attr: { name = attr; value = f attr set.${attr}; }) (attrNames set))
+  );
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/lists.nix#L295
+  range = first: last: if first > last then [] else builtins.genList (n: first + n) (last - first + 1);
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L257
+  stringToCharacters = s: map (p: builtins.substring p 1 s) (range 0 (builtins.stringLength s - 1));
+
+  # https://github.com/NixOS/nixpkgs/blob/0258808f5744ca980b9a1f24fe0b1e6f0fecee9c/lib/strings.nix#L269
+  stringAsChars = f: s: concatStrings (map f (stringToCharacters s));
+  concatMapStrings = f: list: concatStrings (map f list);
+  concatStrings = builtins.concatStringsSep "";
+
+  # https://github.com/NixOS/nixpkgs/blob/8a9f58a375c401b96da862d969f66429def1d118/lib/attrsets.nix#L331
+  optionalAttrs = cond: as: if cond then as else {};
+
+  # fetchTarball version that is compatible between all the versions of Nix
+  builtins_fetchTarball = { url, name ? null, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchTarball;
+    in
+      if lessThan nixVersion "1.12" then
+        fetchTarball ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
+      else
+        fetchTarball attrs;
+
+  # fetchurl version that is compatible between all the versions of Nix
+  builtins_fetchurl = { url, name ? null, sha256 }@attrs:
+    let
+      inherit (builtins) lessThan nixVersion fetchurl;
+    in
+      if lessThan nixVersion "1.12" then
+        fetchurl ({ inherit url; } // (optionalAttrs (!isNull name) { inherit name; }))
+      else
+        fetchurl attrs;
+
+  # Create the final "sources" from the config
+  mkSources = config:
+    mapAttrs (
+      name: spec:
+        if builtins.hasAttr "outPath" spec
+        then abort
+          "The values in sources.json should not have an 'outPath' attribute"
+        else
+          spec // { outPath = replace name (fetch config.pkgs name spec); }
+    ) config.sources;
+
+  # The "config" used by the fetchers
+  mkConfig =
+    { sourcesFile ? if builtins.pathExists ./sources.json then ./sources.json else null
+    , sources ? if isNull sourcesFile then {} else builtins.fromJSON (builtins.readFile sourcesFile)
+    , system ? builtins.currentSystem
+    , pkgs ? mkPkgs sources system
+    }: rec {
+      # The sources, i.e. the attribute set of spec name to spec
+      inherit sources;
+
+      # The "pkgs" (evaluated nixpkgs) to use for e.g. non-builtin fetchers
+      inherit pkgs;
+    };
+
+in
+mkSources (mkConfig {}) // { __functor = _: settings: mkSources (mkConfig settings); }
diff --git a/haskell-clash/shell.nix b/haskell-clash/shell.nix
new file mode 100644
index 0000000..ea5b74d
--- /dev/null
+++ b/haskell-clash/shell.nix
@@ -0,0 +1,11 @@
+let
+  clash-only-shell = import ./clash-only-shell.nix {};
+in
+(import ./default.nix).shellFor {
+  tools = {
+    cabal = "3.2.0.0";
+    hlint = "latest";
+    #haskell-language-server = "latest";
+  };
+  inputsFrom = [ clash-only-shell ];
+}
diff --git a/haskell-clash/vhdl/MAC/mac_types.vhdl b/haskell-clash/vhdl/MAC/mac_types.vhdl
new file mode 100644
index 0000000..db89075
--- /dev/null
+++ b/haskell-clash/vhdl/MAC/mac_types.vhdl
@@ -0,0 +1,87 @@
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+use IEEE.NUMERIC_STD.ALL;
+
+package mac_types is
+
+  subtype rst_system is std_logic;
+
+  type tup2 is record
+    tup2_sel0_signed_0 : signed(63 downto 0);
+    tup2_sel1_signed_1 : signed(63 downto 0);
+  end record;
+  subtype clk_system is std_logic;
+  function toSLV (b : in boolean) return std_logic_vector;
+  function fromSLV (sl : in std_logic_vector) return boolean;
+  function tagToEnum (s : in signed) return boolean;
+  function dataToTag (b : in boolean) return signed;
+  function toSLV (sl : in std_logic) return std_logic_vector;
+  function fromSLV (slv : in std_logic_vector) return std_logic;
+  function toSLV (s : in signed) return std_logic_vector;
+  function fromSLV (slv : in std_logic_vector) return signed;
+  function toSLV (p : mac_types.tup2) return std_logic_vector;
+  function fromSLV (slv : in std_logic_vector) return mac_types.tup2;
+end;
+
+package body mac_types is
+  function toSLV (b : in boolean) return std_logic_vector is
+  begin
+    if b then
+      return "1";
+    else
+      return "0";
+    end if;
+  end;
+  function fromSLV (sl : in std_logic_vector) return boolean is
+  begin
+    if sl = "1" then
+      return true;
+    else
+      return false;
+    end if;
+  end;
+  function tagToEnum (s : in signed) return boolean is
+  begin
+    if s = to_signed(0,64) then
+      return false;
+    else
+      return true;
+    end if;
+  end;
+  function dataToTag (b : in boolean) return signed is
+  begin
+    if b then
+      return to_signed(1,64);
+    else
+      return to_signed(0,64);
+    end if;
+  end;
+  function toSLV (sl : in std_logic) return std_logic_vector is
+  begin
+    return std_logic_vector'(0 => sl);
+  end;
+  function fromSLV (slv : in std_logic_vector) return std_logic is
+    alias islv : std_logic_vector (0 to slv'length - 1) is slv;
+  begin
+    return islv(0);
+  end;
+  function toSLV (s : in signed) return std_logic_vector is
+  begin
+    return std_logic_vector(s);
+  end;
+  function fromSLV (slv : in std_logic_vector) return signed is
+    alias islv : std_logic_vector(0 to slv'length - 1) is slv;
+  begin
+    return signed(islv);
+  end;
+  function toSLV (p : mac_types.tup2) return std_logic_vector is
+  begin
+    return (toSLV(p.tup2_sel0_signed_0) & toSLV(p.tup2_sel1_signed_1));
+  end;
+  function fromSLV (slv : in std_logic_vector) return mac_types.tup2 is
+  alias islv : std_logic_vector(0 to slv'length - 1) is slv;
+  begin
+    return (fromSLV(islv(0 to 63)),fromSLV(islv(64 to 127)));
+  end;
+end;
+
diff --git a/haskell-clash/vhdl/MAC/topentity.manifest b/haskell-clash/vhdl/MAC/topentity.manifest
new file mode 100644
index 0000000..60bd904
--- /dev/null
+++ b/haskell-clash/vhdl/MAC/topentity.manifest
@@ -0,0 +1,2 @@
+Manifest {manifestHash = (-1555348365264137906,Nothing), successFlags = (20,20,False), portInNames = ["clk","rst","en","\\c$arg_0\\","\\c$arg_1\\"], portInTypes = ["topentity.mac_types.clk_system","topentity.mac_types.rst_system","boolean","signed(63 downto 0)","signed(63 downto 0)"], portOutNames = ["result"], portOutTypes = ["signed(63 downto 0)"], componentNames = ["topentity"]}
+
diff --git a/haskell-clash/vhdl/MAC/topentity.vhdl b/haskell-clash/vhdl/MAC/topentity.vhdl
new file mode 100644
index 0000000..085b8ca
--- /dev/null
+++ b/haskell-clash/vhdl/MAC/topentity.vhdl
@@ -0,0 +1,70 @@
+-- Automatically generated VHDL-93
+library IEEE;
+use IEEE.STD_LOGIC_1164.ALL;
+use IEEE.NUMERIC_STD.ALL;
+use IEEE.MATH_REAL.ALL;
+use std.textio.all;
+use work.all;
+use work.mac_types.all;
+
+entity topentity is
+  port(-- clock
+       clk       : in mac_types.clk_system;
+       -- reset
+       rst       : in mac_types.rst_system;
+       en        : in boolean;
+       \c$arg_0\ : in signed(63 downto 0);
+       \c$arg_1\ : in signed(63 downto 0);
+       result    : out signed(63 downto 0));
+end;
+
+architecture structural of topentity is
+  -- MAC.hs:6:1-39
+  signal acc            : signed(63 downto 0) := to_signed(0,64);
+  -- MAC.hs:6:1-39
+  signal x              : signed(63 downto 0);
+  -- MAC.hs:6:1-39
+  signal y              : signed(63 downto 0);
+  signal x_0            : signed(63 downto 0);
+  signal y_0            : signed(63 downto 0);
+  signal x_1            : signed(63 downto 0);
+  signal y_1            : signed(63 downto 0);
+  signal \c$arg\        : mac_types.tup2;
+  signal y_0_projection : signed(63 downto 0);
+
+begin
+  \c$arg\ <= ( tup2_sel0_signed_0 => \c$arg_0\
+             , tup2_sel1_signed_1 => \c$arg_1\ );
+
+  -- register begin 
+  acc_register : process(clk,rst)
+  begin
+    if rst =  '1'  then
+      acc <= to_signed(0,64);
+    elsif rising_edge(clk) then
+      if en then
+        acc <= ((x_0 + y_0));
+      end if;
+    end if;
+  end process;
+  -- register end
+
+  x <= \c$arg\.tup2_sel0_signed_0;
+
+  y <= \c$arg\.tup2_sel1_signed_1;
+
+  x_0 <= acc;
+
+  y_0_projection <= (resize(x_1 * y_1,64));
+
+  y_0 <= y_0_projection;
+
+  x_1 <= x;
+
+  y_1 <= y;
+
+  result <= acc;
+
+
+end;
+