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systemc: Implement sc_(g|s)et_time_resolution.

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Change-Id: If546bea633e777cdb2b14f47c0d9d50b044b99cf
Reviewed-on: https://gem5-review.googlesource.com/c/12461
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
This commit is contained in:
Gabe Black
2018-09-01 17:15:24 -07:00
parent 25c0c8320d
commit 4f3913eff9
1 changed files with 50 additions and 4 deletions
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54
src/systemc/core/sc_time.cc
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@@ -33,7 +33,9 @@
#include "base/types.hh"
#include "python/pybind11/pybind.hh"
#include "systemc/core/python.hh"
#include "systemc/ext/core/sc_main.hh"
#include "systemc/ext/core/sc_time.hh"
#include "systemc/ext/utils/sc_report_handler.hh"
namespace sc_core
{
@@ -97,6 +99,15 @@ fixTime()
toSet.clear();
}
void
setGlobalFrequency(Tick ticks_per_second)
{
auto ticks = pybind11::module::import("m5.ticks");
auto set_global_frequency = ticks.attr("setGlobalFrequency");
set_global_frequency(ticks_per_second);
fixTime();
}
void
set(::sc_core::sc_time *time, double d, ::sc_core::sc_time_unit tu)
{
@@ -358,16 +369,51 @@ operator << (std::ostream &os, const sc_time &t)
const sc_time SC_ZERO_TIME;
void
sc_set_time_resolution(double, sc_time_unit)
sc_set_time_resolution(double d, sc_time_unit tu)
{
warn("%s not implemented.\n", __PRETTY_FUNCTION__);
if (d < 0.0) {
SC_REPORT_ERROR("(E514) set time resolution failed",
"value not positive");
}
double dummy;
if (modf(log10(d), &dummy) != 0.0) {
SC_REPORT_ERROR("(E514) set time resolution failed",
"value not a power of ten");
}
if (sc_is_running()) {
SC_REPORT_ERROR("(E514) set time resolution failed",
"simulation running");
}
static bool specified = false;
if (specified) {
SC_REPORT_ERROR("(E514) set time resolution failed",
"already specified");
}
// This won't detect the timescale being fixed outside of systemc, but
// it's at least some protection.
if (timeFixed) {
SC_REPORT_ERROR("(E514) set time resolution failed",
"sc_time object(s) constructed");
}
// Normalize d to seconds.
d *= TimeUnitScale[tu];
if (d < TimeUnitScale[SC_FS]) {
SC_REPORT_ERROR("(E514) set time resolution failed",
"value smaller than 1 fs");
}
// Change d from a period to a frequency.
d = 1 / d;
// Convert to integer ticks.
Tick ticks_per_second = static_cast<Tick>(d);
setGlobalFrequency(ticks_per_second);
specified = true;
}
sc_time
sc_get_time_resolution()
{
warn("%s not implemented.\n", __PRETTY_FUNCTION__);
return sc_time();
return sc_time::from_value(1);
}
const sc_time &