diff --git a/src/iss/plugin/pctrace.cpp b/src/iss/plugin/pctrace.cpp
index 7f25652..fdda44d 100644
--- a/src/iss/plugin/pctrace.cpp
+++ b/src/iss/plugin/pctrace.cpp
@@ -1,5 +1,5 @@
 #include <iss/arch_if.h>
-#include "pctrace.h"
+#include <iss/plugin/pctrace.h>
 #include <util/logging.h>
 #include <util/ities.h>
 #include <rapidjson/document.h>
@@ -157,8 +157,9 @@ void cov::callback(instr_info_t iinfo, const exec_info& einfo) {
     size_t id = iinfo.instr_id;
     auto entry = delays[id];
     auto instr = instr_if->get_instr_word();
-    auto call = (id==2 || id==3) && bit_sub<7,5>(instr)!=0;
+    auto call = id==65 || id ==86 || ((id==2 || id==3) && bit_sub<7,5>(instr)!=0) ;//not taking care of tail calls (jalr with loading x6)
     bool taken = einfo.branch_taken;
+    bool compressed = (instr&0x3)!=0x3;
     if (einfo.branch_taken) {
         delay = entry.taken;
         if(entry.taken > 1)
@@ -169,10 +170,10 @@ void cov::callback(instr_info_t iinfo, const exec_info& einfo) {
             instr_if->set_curr_instr_cycles(entry.not_taken);
     }
 #ifndef WITH_LZ4
-    output<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay <<"," << call<< "\n";
+    output<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay <<"," << call<<","<<(compressed?2:4) <<"\n";
 #else
     auto rdbuf=ostr.rdbuf();
-    ostr<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay <<"," << call<< "\n";
+    ostr<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay <<"," << call<<","<<(compressed?2:4) <<"\n";
 #endif
 }
 }
diff --git a/src/plugin/pctrace.cpp b/src/plugin/pctrace.cpp
deleted file mode 100644
index 0d93801..0000000
--- a/src/plugin/pctrace.cpp
+++ /dev/null
@@ -1,180 +0,0 @@
-#include <iss/arch_if.h>
-#include <iss/plugin/pctrace.h>
-#include <util/logging.h>
-#include <util/ities.h>
-#include <rapidjson/document.h>
-#include <rapidjson/istreamwrapper.h>
-#include "rapidjson/writer.h"
-#include "rapidjson/stringbuffer.h"
-#include <rapidjson/ostreamwrapper.h>
-#include <rapidjson/error/en.h>
-#include <fstream>
-#include <iostream>
-#ifdef WITH_LZ4
-#include <lz4frame.h>
-#endif
-
-namespace iss {
-namespace plugin {
-
-using namespace rapidjson;
-using namespace std;
-
-#ifdef WITH_LZ4
-class lz4compress_steambuf: public std::streambuf {
-public:
-    lz4compress_steambuf(const lz4compress_steambuf&) = delete;
-    lz4compress_steambuf& operator=(const lz4compress_steambuf&) = delete;
-    lz4compress_steambuf(std::ostream &sink, size_t buf_size)
-    : sink(sink)
-    , src_buf(buf_size)
-    , dest_buf(LZ4F_compressBound(buf_size, nullptr))
-    {
-        auto errCode = LZ4F_createCompressionContext(&ctx, LZ4F_VERSION);
-        if (LZ4F_isError(errCode) != 0)
-            throw std::runtime_error(std::string("Failed to create LZ4 context: ") + LZ4F_getErrorName(errCode));
-        size_t ret = LZ4F_compressBegin(ctx, &dest_buf.front(), dest_buf.capacity(), nullptr);
-        if (LZ4F_isError(ret) != 0)
-            throw std::runtime_error(std::string("Failed to start LZ4 compression: ") + LZ4F_getErrorName(ret));
-        setp(src_buf.data(), src_buf.data() + src_buf.size() - 1);
-        sink.write(dest_buf.data(), ret);
-    }
-
-    ~lz4compress_steambuf() {
-        close();
-    }
-
-    void close() {
-        if (closed)
-            return;
-        sync();
-        auto ret = LZ4F_compressEnd(ctx, dest_buf.data(), dest_buf.capacity(), nullptr);
-        if (LZ4F_isError(ret) != 0)
-            throw std::runtime_error(std::string("Failed to finish LZ4 compression: ") + LZ4F_getErrorName(ret));
-        sink.write(dest_buf.data(), ret);
-        LZ4F_freeCompressionContext(ctx);
-        closed = true;
-    }
-
-private:
-    int_type overflow(int_type ch) override {
-        compress_and_write();
-        *pptr() = static_cast<char_type>(ch);
-        pbump(1);
-        return ch;
-    }
-
-    int_type sync() override {
-        compress_and_write();
-        return 0;
-    }
-
-    void compress_and_write() {
-        if (closed)
-            throw std::runtime_error("Cannot write to closed stream");
-        if(auto orig_size = pptr() - pbase()){
-            auto ret = LZ4F_compressUpdate(ctx, dest_buf.data(), dest_buf.capacity(), pbase(), orig_size, nullptr);
-            if (LZ4F_isError(ret) != 0)
-                throw std::runtime_error(std::string("LZ4 compression failed: ") + LZ4F_getErrorName(ret));
-            if(ret) sink.write(dest_buf.data(), ret);
-            pbump(-orig_size);
-        }
-    }
-
-    std::ostream &sink;
-    std::vector<char> src_buf;
-    std::vector<char> dest_buf;
-    LZ4F_compressionContext_t ctx{ nullptr };
-    bool closed{ false };
-};
-#endif
-
-cov::cov(std::string const &filename)
-: instr_if(nullptr)
-, filename(filename)
-, output("output.trc")
-#ifdef WITH_LZ4
-, strbuf(new lz4compress_steambuf(output, 4096))
-, ostr(strbuf.get())
-#endif
-{ }
-
-cov::~cov() { }
-
-bool cov::registration(const char *const version, vm_if& vm) {
-    instr_if = vm.get_arch()->get_instrumentation_if();
-    if(!instr_if) return false;
-    const string  core_name = instr_if->core_type_name();
-    if (filename.length() > 0) {
-        ifstream is(filename);
-        if (is.is_open()) {
-            try {
-                IStreamWrapper isw(is);
-                Document d;
-                ParseResult ok = d.ParseStream(isw);
-                if(ok) {
-                    Value& val = d[core_name.c_str()];
-                    if(val.IsArray()){
-                        delays.reserve(val.Size());
-                        for (auto it = val.Begin(); it != val.End(); ++it) {
-                            auto& name = (*it)["name"];
-                            auto& size = (*it)["size"];
-                            auto& delay = (*it)["delay"];
-                            auto& branch = (*it)["branch"];
-                            if(delay.IsArray()) {
-                                auto dt = delay[0].Get<unsigned>();
-                                auto dnt = delay[1].Get<unsigned>();
-                                delays.push_back(instr_desc{size.Get<unsigned>(), dt, dnt, branch.Get<bool>()});
-                            } else if(delay.Is<unsigned>()) {
-                                auto d = delay.Get<unsigned>();
-                                delays.push_back(instr_desc{size.Get<unsigned>(), d, d, branch.Get<bool>()});
-                            } else
-                                throw runtime_error("JSON parse error");
-
-                        }
-                    } else {
-                        LOG(ERR)<<"plugin cycle_estimate: could not find an entry for "<<core_name<<" in JSON file"<<endl;
-                        return false;
-                    }
-                } else {
-                    LOG(ERR)<<"plugin cycle_estimate: could not parse in JSON file at "<< ok.Offset()<<": "<<GetParseError_En(ok.Code())<<endl;
-                    return false;
-                }
-            } catch (runtime_error &e) {
-                LOG(ERR) << "Could not parse input file " << filename << ", reason: " << e.what();
-                return false;
-            }
-        } else {
-            LOG(ERR) << "Could not open input file " << filename;
-            return false;
-        }
-    }
-    return true;
-}
-
-void cov::callback(instr_info_t iinfo, const exec_info& einfo) {
-    auto delay = 0;
-    size_t id = iinfo.instr_id;
-    auto entry = delays[id];
-    auto instr = instr_if->get_instr_word();
-    auto call = id==65 || id ==86 || ((id==2 || id==3) && bit_sub<7,5>(instr)!=0) ;//not taking care of tail calls (jalr with loading x6)
-    bool taken = einfo.branch_taken;
-    bool compressed = (instr&0x3)!=0x3;
-    if (einfo.branch_taken) {
-        delay = entry.taken;
-        if(entry.taken > 1)
-            instr_if->set_curr_instr_cycles(entry.taken);
-    } else {
-        delay = entry.not_taken;
-        if (entry.not_taken > 1)
-            instr_if->set_curr_instr_cycles(entry.not_taken);
-    }
-#ifndef WITH_LZ4
-    output<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay <<"," << call<<","<<(compressed?2:4) <<"\n";
-#else
-    auto rdbuf=ostr.rdbuf();
-    ostr<<std::hex <<"0x" << instr_if->get_pc() <<"," << delay <<"," << call<<","<<(compressed?2:4) <<"\n";
-#endif
-}
-}
-}