X-Git-Url: https://git.stderr.nl/gitweb?p=matthijs%2Fmaster-project%2Fdsd-paper.git;a=blobdiff_plain;f=c%CE%BBash.lhs;h=6f158b5edc0b4e04357e51977bfb7a6ca8ab9e3f;hp=c4a281f53f9d3e481545c29f745b401d9c30428e;hb=ff86fa7f14fb766248ff24849e3621674ba501e8;hpb=9cc0ced6d48897fdc2253bb35b0c1b8c49f84f83;ds=sidebyside

diff --git "a/c\316\273ash.lhs" "b/c\316\273ash.lhs"
index c4a281f..6f158b5 100644
--- "a/c\316\273ash.lhs"
+++ "b/c\316\273ash.lhs"
@@ -1013,7 +1013,27 @@ by an (optimizing) \VHDL\ synthesis tool.
     
 \section{\CLaSH\ prototype}
 
-foo\par bar
+The \CLaSH language as presented above can be translated to \VHDL using
+the prototype \CLaSH compiler. This compiler allows experimentation with
+the \CLaSH language and allows for running \CLaSH designs on actual FPGA
+hardware.
+
+\comment{Add clash pipeline image}
+The prototype heavily uses \GHC, the Glasgow Haskell Compiler. Figure
+TODO shows the \CLaSH compiler pipeline. As you can see, the frontend
+is completely reused from \GHC, which allows the \CLaSH prototype to
+support most of the Haskell Language. The \GHC frontend produces the
+program in the \emph{Core} format, which is a very small, functional,
+typed language which is relatively easy to process.
+
+The second step in the compilation process is \emph{normalization}. This
+step runs a number of \emph{meaning preserving} transformations on the
+Core program, to bring it into a \emph{normal form}. This normal form
+has a number of restrictions that make the program similar to hardware.
+In particular, a program in normal form no longer has any polymorphism
+or higher order functions.
+
+The final step is a simple translation to \VHDL.
 
 \section{Use cases}
 As an example of a common hardware design where the use of higher-order