link on the prisc22 paper

README.md

@@ -22,7 +22,8 @@ This is a very experimental version of CompCert introducing a [PseudoAsm](riscV/
 that gives an "Asm-like" semantics to "Mach" programs with a defensive check that all indirect function calls only branch at some function entry.
 The purpose is then to prove a bi-simulation between "Mach" and "PseudoAsm". 
 See [PseudoAsmproof](riscV/lib/PseudoAsmproof.v) and [PseudoAsmRecipSimu](riscV/lib/PseudoAsmRecipSimu.v).
-       
+See also explanations in our [PriSC paper](https://popl22.sigplan.org/details/prisc-2022-papers/8/A-CompCert-backend-with-symbolic-encryption).
+   
 The people responsible for this version are
 
 * Sylvain Boulmé (Grenoble-INP, Verimag)
@@ -31,6 +32,13 @@ The people responsible for this version are
 For inquiries on this very specific version, contact: 
  Sylvain.Boulme@univ-grenoble-alpes.fr
 
+## Compiling this IntrinSec target of CompCert
+
+1. you need a GCC compiler for RISC-V 32 (e.g. `riscv32-unknown-elf-gcc` installed from `sudo apt-get -y install gcc-riscv64-linux-gnu`).
+2. you need to configure CompCert compilation for `intrinsec` (e.g. use [`config_intrinsec.sh`](config_intrinsec.sh)).
+3. then, run `make -j`.
+
+This version is really experimental and is not yet intended for code generation.
 
 ## License
 CompCert is not free software.  This non-commercial release can only