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Merge pull request #2403 from nakengelhardt/sim_timescale

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sim -vcd: add date, version, and option for timescale
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N. Engelhardt 2020-10-22 14:01:24 +02:00 • committed by GitHub
commit 3b86b5da5f
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1 changed files with 21 additions and 0 deletions
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21
passes/sat/sim.cc
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@ -22,6 +22,8 @@
#include "kernel/celltypes.h" #include "kernel/celltypes.h"
#include "kernel/mem.h" #include "kernel/mem.h"
#include <ctime>
USING_YOSYS_NAMESPACE USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN PRIVATE_NAMESPACE_BEGIN
@ -620,6 +622,7 @@ struct SimWorker : SimShared
SimInstance *top = nullptr; SimInstance *top = nullptr;
std::ofstream vcdfile; std::ofstream vcdfile;
pool<IdString> clock, clockn, reset, resetn; pool<IdString> clock, clockn, reset, resetn;
std::string timescale;
~SimWorker() ~SimWorker()
{ {
@ -631,6 +634,17 @@ struct SimWorker : SimShared
if (!vcdfile.is_open()) if (!vcdfile.is_open())
return; return;
vcdfile << stringf("$version %s $end\n", yosys_version_str);
std::time_t t = std::time(nullptr);
char mbstr[255];
if (std::strftime(mbstr, sizeof(mbstr), "%c", std::localtime(&t))) {
vcdfile << stringf("$date ") << mbstr << stringf(" $end\n");
}
if (!timescale.empty())
vcdfile << stringf("$timescale %s $end\n", timescale.c_str());
int id = 1; int id = 1;
top->write_vcd_header(vcdfile, id); top->write_vcd_header(vcdfile, id);
@ -770,6 +784,9 @@ struct SimPass : public Pass {
log(" -zinit\n"); log(" -zinit\n");
log(" zero-initialize all uninitialized regs and memories\n"); log(" zero-initialize all uninitialized regs and memories\n");
log("\n"); log("\n");
log(" -timescale <string>\n");
log(" include the specified timescale declaration in the vcd\n");
log("\n");
log(" -n <integer>\n"); log(" -n <integer>\n");
log(" number of cycles to simulate (default: 20)\n"); log(" number of cycles to simulate (default: 20)\n");
log("\n"); log("\n");
@ -820,6 +837,10 @@ struct SimPass : public Pass {
worker.resetn.insert(RTLIL::escape_id(args[++argidx])); worker.resetn.insert(RTLIL::escape_id(args[++argidx]));
continue; continue;
} }
if (args[argidx] == "-timescale" && argidx+1 < args.size()) {
worker.timescale = args[++argidx];
continue;
}
if (args[argidx] == "-a") { if (args[argidx] == "-a") {
worker.hide_internal = false; worker.hide_internal = false;
continue; continue;