README: add clarification about HLS

diff --git a/README.md b/README.md
index 3b4e07d8edc0b5fdd98b19a4519a371489121150..79b55c359733a94b7baa400414d4a16f8414ba94 100644 (file)
--- a/README.md
+++ b/README.md
@@ -22,6 +22,10 @@ Thanks [LambdaConcept][] for being a sponsor of this project! Contact sb [at] m-
 [yosys]: http://www.clifford.at/yosys/
 [lambdaconcept]: http://lambdaconcept.com/
 
+### HLS?
+
+nMigen is *not* a "Python-to-FPGA" conventional high level synthesis (HLS) tool. It will *not* take a Python program as input and generate a hardware implementation of it. In nMigen, the Python program is executed by a regular Python interpreter, and it emits explicit statements in the FHDL domain-specific language.  Writing a conventional HLS tool that uses nMigen as an internal component might be a good idea, on the other hand :)
+
 ### Installation
 
     pip install git+https://github.com/m-labs/nmigen.git