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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2022 Miodrag Milanovic <micko@yosyshq.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "kernel/fstdata.h"
USING_YOSYS_NAMESPACE
static std::string file_base_name(std::string const & path)
{
return path.substr(path.find_last_of("/\\") + 1);
}
FstData::FstData(std::string filename) : ctx(nullptr)
{
#if !defined(YOSYS_DISABLE_SPAWN)
std::string filename_trim = file_base_name(filename);
if (filename_trim.size() > 4 && filename_trim.compare(filename_trim.size()-4, std::string::npos, ".vcd") == 0) {
filename_trim.erase(filename_trim.size()-4);
tmp_file = stringf("%s/converted_%s.fst", get_base_tmpdir().c_str(), filename_trim.c_str());
std::string cmd = stringf("vcd2fst %s %s", filename.c_str(), tmp_file.c_str());
log("Exec: %s\n", cmd.c_str());
if (run_command(cmd) != 0)
log_cmd_error("Shell command failed!\n");
filename = tmp_file;
}
#endif
const std::vector<std::string> g_units = { "s", "ms", "us", "ns", "ps", "fs", "as", "zs" };
ctx = (fstReaderContext *)fstReaderOpen(filename.c_str());
if (!ctx)
log_error("Error opening '%s' as FST file\n", filename.c_str());
int scale = (int)fstReaderGetTimescale(ctx);
timescale = pow(10.0, scale);
timescale_str = "";
int unit = 0;
int zeros = 0;
if (scale > 0) {
zeros = scale;
} else {
if ((scale % 3) == 0) {
zeros = (-scale % 3);
unit = (-scale / 3);
} else {
zeros = 3 - (-scale % 3);
unit = (-scale / 3) + 1;
}
}
for (int i=0;i<zeros; i++) timescale_str += "0";
timescale_str += g_units[unit];
extractVarNames();
}
FstData::~FstData()
{
if (ctx)
fstReaderClose(ctx);
if (!tmp_file.empty())
remove(tmp_file.c_str());
}
uint64_t FstData::getStartTime() { return fstReaderGetStartTime(ctx); }
uint64_t FstData::getEndTime() { return fstReaderGetEndTime(ctx); }
static void normalize_brackets(std::string &str)
{
for (auto &c : str) {
if (c == '<')
c = '[';
else if (c == '>')
c = ']';
}
}
fstHandle FstData::getHandle(std::string name) {
normalize_brackets(name);
if (name_to_handle.find(name) != name_to_handle.end())
return name_to_handle[name];
else
return 0;
};
dict<int,fstHandle> FstData::getMemoryHandles(std::string name) {
if (memory_to_handle.find(name) != memory_to_handle.end())
return memory_to_handle[name];
else
return dict<int,fstHandle>();
};
static std::string remove_spaces(std::string str)
{
str.erase(std::remove(str.begin(), str.end(), ' '), str.end());
return str;
}
void FstData::extractVarNames()
{
struct fstHier *h;
std::string fst_scope_name;
while ((h = fstReaderIterateHier(ctx))) {
switch (h->htyp) {
case FST_HT_SCOPE: {
fst_scope_name = fstReaderPushScope(ctx, h->u.scope.name, NULL);
break;
}
case FST_HT_UPSCOPE: {
fst_scope_name = fstReaderPopScope(ctx);
break;
}
case FST_HT_VAR: {
FstVar var;
var.id = h->u.var.handle;
var.is_alias = h->u.var.is_alias;
var.is_reg = (fstVarType)h->u.var.typ == FST_VT_VCD_REG;
var.name = remove_spaces(h->u.var.name);
var.scope = fst_scope_name;
normalize_brackets(var.scope);
var.width = h->u.var.length;
vars.push_back(var);
if (!var.is_alias)
handle_to_var[h->u.var.handle] = var;
std::string clean_name;
for(size_t i=0;i<strlen(h->u.var.name);i++)
{
char c = h->u.var.name[i];
if(c==' ') break;
clean_name += c;
}
if (clean_name[0]=='\\')
clean_name = clean_name.substr(1);
size_t pos = clean_name.find_last_of("<");
if (pos != std::string::npos && clean_name.back() == '>') {
std::string mem_cell = clean_name.substr(0, pos);
normalize_brackets(mem_cell);
std::string addr = clean_name.substr(pos+1);
addr.pop_back(); // remove closing bracket
char *endptr;
int mem_addr = strtol(addr.c_str(), &endptr, 16);
if (*endptr) {
log_debug("Error parsing memory address in : %s\n", clean_name.c_str());
} else {
memory_to_handle[var.scope+"."+mem_cell][mem_addr] = var.id;
}
}
pos = clean_name.find_last_of("[");
if (pos != std::string::npos && clean_name.back() == ']') {
std::string mem_cell = clean_name.substr(0, pos);
normalize_brackets(mem_cell);
std::string addr = clean_name.substr(pos+1);
addr.pop_back(); // remove closing bracket
char *endptr;
int mem_addr = strtol(addr.c_str(), &endptr, 10);
if (*endptr) {
log_debug("Error parsing memory address in : %s\n", clean_name.c_str());
} else {
memory_to_handle[var.scope+"."+mem_cell][mem_addr] = var.id;
}
}
normalize_brackets(clean_name);
name_to_handle[var.scope+"."+clean_name] = h->u.var.handle;
break;
}
}
}
}
static void reconstruct_clb_varlen_attimes(void *user_data, uint64_t pnt_time, fstHandle pnt_facidx, const unsigned char *pnt_value, uint32_t plen)
{
FstData *ptr = (FstData*)user_data;
ptr->reconstruct_callback_attimes(pnt_time, pnt_facidx, pnt_value, plen);
}
static void reconstruct_clb_attimes(void *user_data, uint64_t pnt_time, fstHandle pnt_facidx, const unsigned char *pnt_value)
{
FstData *ptr = (FstData*)user_data;
uint32_t plen = (pnt_value) ? strlen((const char *)pnt_value) : 0;
ptr->reconstruct_callback_attimes(pnt_time, pnt_facidx, pnt_value, plen);
}
void FstData::reconstruct_callback_attimes(uint64_t pnt_time, fstHandle pnt_facidx, const unsigned char *pnt_value, uint32_t /* plen */)
{
if (pnt_time > end_time) return;
// if we are past the timestamp
bool is_clock = false;
if (!all_samples) {
for(auto &s : clk_signals) {
if (s==pnt_facidx) {
is_clock=true;
break;
}
}
}
if (pnt_time > past_time) {
past_data = last_data;
past_time = pnt_time;
}
if (pnt_time > last_time) {
if (all_samples) {
callback(last_time);
last_time = pnt_time;
} else {
if (is_clock) {
std::string val = std::string((const char *)pnt_value);
std::string prev = past_data[pnt_facidx];
if ((prev!="1" && val=="1") || (prev!="0" && val=="0")) {
callback(last_time);
last_time = pnt_time;
}
}
}
}
// always update last_data
last_data[pnt_facidx] = std::string((const char *)pnt_value);
}
void FstData::reconstructAllAtTimes(std::vector<fstHandle> &signal, uint64_t start, uint64_t end, CallbackFunction cb)
{
clk_signals = signal;
callback = cb;
start_time = start;
end_time = end;
last_data.clear();
last_time = start_time;
past_data.clear();
past_time = start_time;
all_samples = clk_signals.empty();
fstReaderSetUnlimitedTimeRange(ctx);
fstReaderSetFacProcessMaskAll(ctx);
fstReaderIterBlocks2(ctx, reconstruct_clb_attimes, reconstruct_clb_varlen_attimes, this, nullptr);
if (last_time!=end_time) {
past_data = last_data;
callback(last_time);
}
past_data = last_data;
callback(end_time);
}
std::string FstData::valueOf(fstHandle signal)
{
if (past_data.find(signal) == past_data.end())
log_error("Signal id %d not found\n", (int)signal);
return past_data[signal];
}
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