sc_time.cc revision 13263
112837Sgabeblack@google.com/* 212837Sgabeblack@google.com * Copyright 2018 Google, Inc. 312837Sgabeblack@google.com * 412837Sgabeblack@google.com * Redistribution and use in source and binary forms, with or without 512837Sgabeblack@google.com * modification, are permitted provided that the following conditions are 612837Sgabeblack@google.com * met: redistributions of source code must retain the above copyright 712837Sgabeblack@google.com * notice, this list of conditions and the following disclaimer; 812837Sgabeblack@google.com * redistributions in binary form must reproduce the above copyright 912837Sgabeblack@google.com * notice, this list of conditions and the following disclaimer in the 1012837Sgabeblack@google.com * documentation and/or other materials provided with the distribution; 1112837Sgabeblack@google.com * neither the name of the copyright holders nor the names of its 1212837Sgabeblack@google.com * contributors may be used to endorse or promote products derived from 1312837Sgabeblack@google.com * this software without specific prior written permission. 1412837Sgabeblack@google.com * 1512837Sgabeblack@google.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1612837Sgabeblack@google.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1712837Sgabeblack@google.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1812837Sgabeblack@google.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 1912837Sgabeblack@google.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2012837Sgabeblack@google.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2112837Sgabeblack@google.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2212837Sgabeblack@google.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2312837Sgabeblack@google.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2412837Sgabeblack@google.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2512837Sgabeblack@google.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2612837Sgabeblack@google.com * 2712837Sgabeblack@google.com * Authors: Gabe Black 2812837Sgabeblack@google.com */ 2912837Sgabeblack@google.com 3013177Sgabeblack@google.com#include <sstream> 3113039Sgabeblack@google.com#include <vector> 3213039Sgabeblack@google.com 3312837Sgabeblack@google.com#include "base/logging.hh" 3412989Sgabeblack@google.com#include "base/types.hh" 3512986Sgabeblack@google.com#include "python/pybind11/pybind.hh" 3613195Sgabeblack@google.com#include "sim/core.hh" 3713039Sgabeblack@google.com#include "systemc/core/python.hh" 3813252Sgabeblack@google.com#include "systemc/core/time.hh" 3913149Sgabeblack@google.com#include "systemc/ext/core/sc_main.hh" 4012837Sgabeblack@google.com#include "systemc/ext/core/sc_time.hh" 4113149Sgabeblack@google.com#include "systemc/ext/utils/sc_report_handler.hh" 4212837Sgabeblack@google.com 4312837Sgabeblack@google.comnamespace sc_core 4412837Sgabeblack@google.com{ 4512837Sgabeblack@google.com 4612983Sgabeblack@google.comnamespace 4712837Sgabeblack@google.com{ 4812983Sgabeblack@google.com 4913039Sgabeblack@google.combool timeFixed = false; 5013039Sgabeblack@google.combool pythonReady = false; 5113039Sgabeblack@google.com 5213039Sgabeblack@google.comstruct SetInfo 5313039Sgabeblack@google.com{ 5413039Sgabeblack@google.com SetInfo(::sc_core::sc_time *time, double d, ::sc_core::sc_time_unit tu) : 5513039Sgabeblack@google.com time(time), d(d), tu(tu) 5613039Sgabeblack@google.com {} 5713039Sgabeblack@google.com 5813039Sgabeblack@google.com ::sc_core::sc_time *time; 5913039Sgabeblack@google.com double d; 6013039Sgabeblack@google.com ::sc_core::sc_time_unit tu; 6113039Sgabeblack@google.com}; 6213039Sgabeblack@google.comstd::vector<SetInfo> toSet; 6313039Sgabeblack@google.com 6412986Sgabeblack@google.comvoid 6513039Sgabeblack@google.comsetWork(sc_time *time, double d, ::sc_core::sc_time_unit tu) 6612986Sgabeblack@google.com{ 6713252Sgabeblack@google.com double scale = sc_gem5::TimeUnitScale[tu] * SimClock::Float::s; 6813039Sgabeblack@google.com // Accellera claims there is a linux bug, and that these next two 6913039Sgabeblack@google.com // lines work around them. 7013039Sgabeblack@google.com volatile double tmp = d * scale + 0.5; 7113039Sgabeblack@google.com *time = sc_time::from_value(static_cast<uint64_t>(tmp)); 7213039Sgabeblack@google.com} 7312986Sgabeblack@google.com 7413039Sgabeblack@google.comvoid 7513039Sgabeblack@google.comfixTime() 7613039Sgabeblack@google.com{ 7712986Sgabeblack@google.com auto ticks = pybind11::module::import("m5.ticks"); 7812986Sgabeblack@google.com auto fix_global_frequency = ticks.attr("fixGlobalFrequency"); 7912986Sgabeblack@google.com fix_global_frequency(); 8013039Sgabeblack@google.com 8113039Sgabeblack@google.com for (auto &t: toSet) 8213039Sgabeblack@google.com setWork(t.time, t.d, t.tu); 8313039Sgabeblack@google.com toSet.clear(); 8412986Sgabeblack@google.com} 8512986Sgabeblack@google.com 8613039Sgabeblack@google.comvoid 8713195Sgabeblack@google.comattemptToFixTime() 8813195Sgabeblack@google.com{ 8913195Sgabeblack@google.com // Only fix time once. 9013195Sgabeblack@google.com if (!timeFixed) { 9113195Sgabeblack@google.com timeFixed = true; 9213195Sgabeblack@google.com 9313195Sgabeblack@google.com // If we've run, python is working and we haven't fixed time yet. 9413195Sgabeblack@google.com if (pythonReady) 9513195Sgabeblack@google.com fixTime(); 9613195Sgabeblack@google.com } 9713195Sgabeblack@google.com} 9813195Sgabeblack@google.com 9913195Sgabeblack@google.comvoid 10013149Sgabeblack@google.comsetGlobalFrequency(Tick ticks_per_second) 10113149Sgabeblack@google.com{ 10213149Sgabeblack@google.com auto ticks = pybind11::module::import("m5.ticks"); 10313149Sgabeblack@google.com auto set_global_frequency = ticks.attr("setGlobalFrequency"); 10413149Sgabeblack@google.com set_global_frequency(ticks_per_second); 10513149Sgabeblack@google.com fixTime(); 10613149Sgabeblack@google.com} 10713149Sgabeblack@google.com 10813149Sgabeblack@google.comvoid 10913039Sgabeblack@google.comset(::sc_core::sc_time *time, double d, ::sc_core::sc_time_unit tu) 11013039Sgabeblack@google.com{ 11113195Sgabeblack@google.com if (d != 0) 11213195Sgabeblack@google.com attemptToFixTime(); 11313039Sgabeblack@google.com if (pythonReady) { 11413039Sgabeblack@google.com // Time should be working. Set up this sc_time. 11513039Sgabeblack@google.com setWork(time, d, tu); 11613039Sgabeblack@google.com } else { 11713039Sgabeblack@google.com // Time isn't set up yet. Defer setting up this sc_time. 11813039Sgabeblack@google.com toSet.emplace_back(time, d, tu); 11913039Sgabeblack@google.com } 12013039Sgabeblack@google.com} 12113039Sgabeblack@google.com 12213039Sgabeblack@google.comclass TimeSetter : public ::sc_gem5::PythonReadyFunc 12313039Sgabeblack@google.com{ 12413039Sgabeblack@google.com public: 12513039Sgabeblack@google.com TimeSetter() : ::sc_gem5::PythonReadyFunc() {} 12613039Sgabeblack@google.com 12713039Sgabeblack@google.com void 12813039Sgabeblack@google.com run() override 12913039Sgabeblack@google.com { 13013039Sgabeblack@google.com // Record that we've run and python/pybind should be usable. 13113039Sgabeblack@google.com pythonReady = true; 13213039Sgabeblack@google.com 13313039Sgabeblack@google.com // If time is already fixed, let python know. 13413039Sgabeblack@google.com if (timeFixed) 13513039Sgabeblack@google.com fixTime(); 13613039Sgabeblack@google.com } 13713039Sgabeblack@google.com} timeSetter; 13813039Sgabeblack@google.com 13913124Sgabeblack@google.comdouble defaultUnit = 1.0e-9; 14013124Sgabeblack@google.com 14112983Sgabeblack@google.com} // anonymous namespace 14212983Sgabeblack@google.com 14312983Sgabeblack@google.comsc_time::sc_time() : val(0) {} 14412983Sgabeblack@google.com 14512983Sgabeblack@google.comsc_time::sc_time(double d, sc_time_unit tu) 14612983Sgabeblack@google.com{ 14712983Sgabeblack@google.com val = 0; 14813195Sgabeblack@google.com set(this, d, tu); 14912837Sgabeblack@google.com} 15012837Sgabeblack@google.com 15112983Sgabeblack@google.comsc_time::sc_time(const sc_time &t) 15212837Sgabeblack@google.com{ 15312983Sgabeblack@google.com val = t.val; 15412837Sgabeblack@google.com} 15512837Sgabeblack@google.com 15613057Sgabeblack@google.comsc_time::sc_time(double d, bool scale) 15712925Sgabeblack@google.com{ 15813195Sgabeblack@google.com double scaler = scale ? defaultUnit : SimClock::Float::Hz; 15913195Sgabeblack@google.com set(this, d * scaler, SC_SEC); 16012925Sgabeblack@google.com} 16112925Sgabeblack@google.com 16213057Sgabeblack@google.comsc_time::sc_time(sc_dt::uint64 v, bool scale) 16312925Sgabeblack@google.com{ 16413195Sgabeblack@google.com double scaler = scale ? defaultUnit : SimClock::Float::Hz; 16513195Sgabeblack@google.com set(this, static_cast<double>(v) * scaler, SC_SEC); 16612925Sgabeblack@google.com} 16712925Sgabeblack@google.com 16812837Sgabeblack@google.comsc_time & 16912983Sgabeblack@google.comsc_time::operator = (const sc_time &t) 17012837Sgabeblack@google.com{ 17112983Sgabeblack@google.com val = t.val; 17212837Sgabeblack@google.com return *this; 17312837Sgabeblack@google.com} 17412837Sgabeblack@google.com 17512837Sgabeblack@google.comsc_dt::uint64 17612837Sgabeblack@google.comsc_time::value() const 17712837Sgabeblack@google.com{ 17812983Sgabeblack@google.com return val; 17912837Sgabeblack@google.com} 18012837Sgabeblack@google.com 18112837Sgabeblack@google.comdouble 18212837Sgabeblack@google.comsc_time::to_double() const 18312837Sgabeblack@google.com{ 18413040Sgabeblack@google.com return static_cast<double>(val); 18512837Sgabeblack@google.com} 18612837Sgabeblack@google.comdouble 18712837Sgabeblack@google.comsc_time::to_seconds() const 18812837Sgabeblack@google.com{ 18913195Sgabeblack@google.com return to_double() * SimClock::Float::Hz; 19012837Sgabeblack@google.com} 19112837Sgabeblack@google.com 19212837Sgabeblack@google.comconst std::string 19312837Sgabeblack@google.comsc_time::to_string() const 19412837Sgabeblack@google.com{ 19513177Sgabeblack@google.com std::ostringstream ss; 19613177Sgabeblack@google.com print(ss); 19713177Sgabeblack@google.com return ss.str(); 19812837Sgabeblack@google.com} 19912837Sgabeblack@google.com 20012837Sgabeblack@google.combool 20112983Sgabeblack@google.comsc_time::operator == (const sc_time &t) const 20212837Sgabeblack@google.com{ 20312983Sgabeblack@google.com return val == t.val; 20412837Sgabeblack@google.com} 20512837Sgabeblack@google.com 20612837Sgabeblack@google.combool 20712983Sgabeblack@google.comsc_time::operator != (const sc_time &t) const 20812837Sgabeblack@google.com{ 20912983Sgabeblack@google.com return val != t.val; 21012837Sgabeblack@google.com} 21112837Sgabeblack@google.com 21212837Sgabeblack@google.combool 21312983Sgabeblack@google.comsc_time::operator < (const sc_time &t) const 21412837Sgabeblack@google.com{ 21512983Sgabeblack@google.com return val < t.val; 21612837Sgabeblack@google.com} 21712837Sgabeblack@google.com 21812837Sgabeblack@google.combool 21912983Sgabeblack@google.comsc_time::operator <= (const sc_time &t) const 22012837Sgabeblack@google.com{ 22112983Sgabeblack@google.com return val <= t.val; 22212837Sgabeblack@google.com} 22312837Sgabeblack@google.com 22412837Sgabeblack@google.combool 22512983Sgabeblack@google.comsc_time::operator > (const sc_time &t) const 22612837Sgabeblack@google.com{ 22712983Sgabeblack@google.com return val > t.val; 22812837Sgabeblack@google.com} 22912837Sgabeblack@google.com 23012837Sgabeblack@google.combool 23112983Sgabeblack@google.comsc_time::operator >= (const sc_time &t) const 23212837Sgabeblack@google.com{ 23312983Sgabeblack@google.com return val >= t.val; 23412837Sgabeblack@google.com} 23512837Sgabeblack@google.com 23612837Sgabeblack@google.comsc_time & 23712983Sgabeblack@google.comsc_time::operator += (const sc_time &t) 23812837Sgabeblack@google.com{ 23912983Sgabeblack@google.com val += t.val; 24012837Sgabeblack@google.com return *this; 24112837Sgabeblack@google.com} 24212837Sgabeblack@google.com 24312837Sgabeblack@google.comsc_time & 24412983Sgabeblack@google.comsc_time::operator -= (const sc_time &t) 24512837Sgabeblack@google.com{ 24612983Sgabeblack@google.com val -= t.val; 24712837Sgabeblack@google.com return *this; 24812837Sgabeblack@google.com} 24912837Sgabeblack@google.com 25012837Sgabeblack@google.comsc_time & 25113040Sgabeblack@google.comsc_time::operator *= (double d) 25212837Sgabeblack@google.com{ 25313040Sgabeblack@google.com val = static_cast<int64_t>(static_cast<double>(val) * d + 0.5); 25412837Sgabeblack@google.com return *this; 25512837Sgabeblack@google.com} 25612837Sgabeblack@google.com 25712837Sgabeblack@google.comsc_time & 25813040Sgabeblack@google.comsc_time::operator /= (double d) 25912837Sgabeblack@google.com{ 26013040Sgabeblack@google.com val = static_cast<int64_t>(static_cast<double>(val) / d + 0.5); 26112837Sgabeblack@google.com return *this; 26212837Sgabeblack@google.com} 26312837Sgabeblack@google.com 26412837Sgabeblack@google.comvoid 26512983Sgabeblack@google.comsc_time::print(std::ostream &os) const 26612837Sgabeblack@google.com{ 26713263Sgabeblack@google.com os << sc_time_tuple(*this).to_string(); 26812837Sgabeblack@google.com} 26912837Sgabeblack@google.com 27012923Sgabeblack@google.comsc_time 27112983Sgabeblack@google.comsc_time::from_value(sc_dt::uint64 u) 27212923Sgabeblack@google.com{ 27313195Sgabeblack@google.com if (u) 27413195Sgabeblack@google.com attemptToFixTime(); 27512983Sgabeblack@google.com sc_time t; 27612983Sgabeblack@google.com t.val = u; 27712983Sgabeblack@google.com return t; 27812923Sgabeblack@google.com} 27912923Sgabeblack@google.com 28012923Sgabeblack@google.comsc_time 28113057Sgabeblack@google.comsc_time::from_seconds(double d) 28212923Sgabeblack@google.com{ 28313057Sgabeblack@google.com sc_time t; 28413057Sgabeblack@google.com set(&t, d, SC_SEC); 28513057Sgabeblack@google.com return t; 28612923Sgabeblack@google.com} 28712923Sgabeblack@google.com 28812923Sgabeblack@google.comsc_time 28912923Sgabeblack@google.comsc_time::from_string(const char *str) 29012923Sgabeblack@google.com{ 29112923Sgabeblack@google.com warn("%s not implemented.\n", __PRETTY_FUNCTION__); 29212923Sgabeblack@google.com return sc_time(); 29312923Sgabeblack@google.com} 29412923Sgabeblack@google.com 29512837Sgabeblack@google.comconst sc_time 29612989Sgabeblack@google.comoperator + (const sc_time &a, const sc_time &b) 29712837Sgabeblack@google.com{ 29812989Sgabeblack@google.com return sc_time::from_value(a.value() + b.value()); 29912837Sgabeblack@google.com} 30012837Sgabeblack@google.com 30112837Sgabeblack@google.comconst sc_time 30212989Sgabeblack@google.comoperator - (const sc_time &a, const sc_time &b) 30312837Sgabeblack@google.com{ 30412989Sgabeblack@google.com return sc_time::from_value(a.value() - b.value()); 30512837Sgabeblack@google.com} 30612837Sgabeblack@google.com 30712837Sgabeblack@google.comconst sc_time 30813040Sgabeblack@google.comoperator * (const sc_time &t, double d) 30912837Sgabeblack@google.com{ 31013040Sgabeblack@google.com volatile double tmp = static_cast<double>(t.value()) * d + 0.5; 31113040Sgabeblack@google.com return sc_time::from_value(static_cast<int64_t>(tmp)); 31212837Sgabeblack@google.com} 31312837Sgabeblack@google.com 31412837Sgabeblack@google.comconst sc_time 31513040Sgabeblack@google.comoperator * (double d, const sc_time &t) 31612837Sgabeblack@google.com{ 31713040Sgabeblack@google.com volatile double tmp = d * static_cast<double>(t.value()) + 0.5; 31813040Sgabeblack@google.com return sc_time::from_value(static_cast<int64_t>(tmp)); 31912837Sgabeblack@google.com} 32012837Sgabeblack@google.com 32112837Sgabeblack@google.comconst sc_time 32213040Sgabeblack@google.comoperator / (const sc_time &t, double d) 32312837Sgabeblack@google.com{ 32413040Sgabeblack@google.com volatile double tmp = static_cast<double>(t.value()) / d + 0.5; 32513040Sgabeblack@google.com return sc_time::from_value(static_cast<int64_t>(tmp)); 32612837Sgabeblack@google.com} 32712837Sgabeblack@google.com 32812837Sgabeblack@google.comdouble 32913040Sgabeblack@google.comoperator / (const sc_time &t1, const sc_time &t2) 33012837Sgabeblack@google.com{ 33113040Sgabeblack@google.com return t1.to_double() / t2.to_double(); 33212837Sgabeblack@google.com} 33312837Sgabeblack@google.com 33412837Sgabeblack@google.comstd::ostream & 33512983Sgabeblack@google.comoperator << (std::ostream &os, const sc_time &t) 33612837Sgabeblack@google.com{ 33712983Sgabeblack@google.com t.print(os); 33812837Sgabeblack@google.com return os; 33912837Sgabeblack@google.com} 34012837Sgabeblack@google.com 34112837Sgabeblack@google.comconst sc_time SC_ZERO_TIME; 34212837Sgabeblack@google.com 34312837Sgabeblack@google.comvoid 34413149Sgabeblack@google.comsc_set_time_resolution(double d, sc_time_unit tu) 34512837Sgabeblack@google.com{ 34613151Sgabeblack@google.com if (d <= 0.0) { 34713149Sgabeblack@google.com SC_REPORT_ERROR("(E514) set time resolution failed", 34813149Sgabeblack@google.com "value not positive"); 34913149Sgabeblack@google.com } 35013149Sgabeblack@google.com double dummy; 35113149Sgabeblack@google.com if (modf(log10(d), &dummy) != 0.0) { 35213149Sgabeblack@google.com SC_REPORT_ERROR("(E514) set time resolution failed", 35313149Sgabeblack@google.com "value not a power of ten"); 35413149Sgabeblack@google.com } 35513149Sgabeblack@google.com if (sc_is_running()) { 35613149Sgabeblack@google.com SC_REPORT_ERROR("(E514) set time resolution failed", 35713149Sgabeblack@google.com "simulation running"); 35813149Sgabeblack@google.com } 35913149Sgabeblack@google.com static bool specified = false; 36013149Sgabeblack@google.com if (specified) { 36113149Sgabeblack@google.com SC_REPORT_ERROR("(E514) set time resolution failed", 36213149Sgabeblack@google.com "already specified"); 36313149Sgabeblack@google.com } 36413149Sgabeblack@google.com // This won't detect the timescale being fixed outside of systemc, but 36513149Sgabeblack@google.com // it's at least some protection. 36613149Sgabeblack@google.com if (timeFixed) { 36713149Sgabeblack@google.com SC_REPORT_ERROR("(E514) set time resolution failed", 36813149Sgabeblack@google.com "sc_time object(s) constructed"); 36913149Sgabeblack@google.com } 37013149Sgabeblack@google.com 37113252Sgabeblack@google.com double seconds = d * sc_gem5::TimeUnitScale[tu]; 37213252Sgabeblack@google.com if (seconds < sc_gem5::TimeUnitScale[SC_FS]) { 37313149Sgabeblack@google.com SC_REPORT_ERROR("(E514) set time resolution failed", 37413149Sgabeblack@google.com "value smaller than 1 fs"); 37513149Sgabeblack@google.com } 37613195Sgabeblack@google.com 37713195Sgabeblack@google.com if (seconds > defaultUnit) { 37813195Sgabeblack@google.com SC_REPORT_WARNING( 37913195Sgabeblack@google.com "(W516) default time unit changed to time resolution", ""); 38013195Sgabeblack@google.com defaultUnit = seconds; 38113195Sgabeblack@google.com } 38213195Sgabeblack@google.com 38313195Sgabeblack@google.com // Get rid of fractional parts of d. 38413195Sgabeblack@google.com while (d < 1.0 && tu > SC_FS) { 38513195Sgabeblack@google.com d *= 1000; 38613195Sgabeblack@google.com tu = (sc_time_unit)(tu - 1); 38713195Sgabeblack@google.com } 38813195Sgabeblack@google.com 38913252Sgabeblack@google.com Tick ticks_per_second = 39013252Sgabeblack@google.com sc_gem5::TimeUnitFrequency[tu] / static_cast<Tick>(d); 39113149Sgabeblack@google.com setGlobalFrequency(ticks_per_second); 39213149Sgabeblack@google.com specified = true; 39312837Sgabeblack@google.com} 39412837Sgabeblack@google.com 39512837Sgabeblack@google.comsc_time 39612837Sgabeblack@google.comsc_get_time_resolution() 39712837Sgabeblack@google.com{ 39813149Sgabeblack@google.com return sc_time::from_value(1); 39912837Sgabeblack@google.com} 40012837Sgabeblack@google.com 40112837Sgabeblack@google.comconst sc_time & 40212837Sgabeblack@google.comsc_max_time() 40312837Sgabeblack@google.com{ 40412989Sgabeblack@google.com static const sc_time MaxScTime = sc_time::from_value(MaxTick); 40512989Sgabeblack@google.com return MaxScTime; 40612837Sgabeblack@google.com} 40712837Sgabeblack@google.com 40812916Sgabeblack@google.comvoid 40913124Sgabeblack@google.comsc_set_default_time_unit(double d, sc_time_unit tu) 41012916Sgabeblack@google.com{ 41113151Sgabeblack@google.com if (d < 0.0) { 41213151Sgabeblack@google.com SC_REPORT_ERROR("(E515) set default time unit failed", 41313151Sgabeblack@google.com "value not positive"); 41413151Sgabeblack@google.com } 41513151Sgabeblack@google.com double dummy; 41613151Sgabeblack@google.com if (modf(log10(d), &dummy) != 0.0) { 41713151Sgabeblack@google.com SC_REPORT_ERROR("(E515) set default time unit failed", 41813151Sgabeblack@google.com "value not a power of ten"); 41913151Sgabeblack@google.com } 42013151Sgabeblack@google.com if (sc_is_running()) { 42113151Sgabeblack@google.com SC_REPORT_ERROR("(E515) set default time unit failed", 42213151Sgabeblack@google.com "simulation running"); 42313151Sgabeblack@google.com } 42413151Sgabeblack@google.com static bool specified = false; 42513151Sgabeblack@google.com if (specified) { 42613151Sgabeblack@google.com SC_REPORT_ERROR("(E515) set default time unit failed", 42713151Sgabeblack@google.com "already specified"); 42813151Sgabeblack@google.com } 42913151Sgabeblack@google.com // This won't detect the timescale being fixed outside of systemc, but 43013151Sgabeblack@google.com // it's at least some protection. 43113151Sgabeblack@google.com if (timeFixed) { 43213151Sgabeblack@google.com SC_REPORT_ERROR("(E515) set default time unit failed", 43313151Sgabeblack@google.com "sc_time object(s) constructed"); 43413151Sgabeblack@google.com } 43513151Sgabeblack@google.com 43613151Sgabeblack@google.com // Normalize d to seconds. 43713252Sgabeblack@google.com defaultUnit = d * sc_gem5::TimeUnitScale[tu]; 43813151Sgabeblack@google.com specified = true; 43913247Sgabeblack@google.com 44013247Sgabeblack@google.com double resolution = SimClock::Float::Hz; 44113247Sgabeblack@google.com if (resolution == 0.0) 44213252Sgabeblack@google.com resolution = sc_gem5::TimeUnitScale[SC_PS]; 44313247Sgabeblack@google.com if (defaultUnit < resolution) { 44413247Sgabeblack@google.com SC_REPORT_ERROR("(E515) set default time unit failed", 44513247Sgabeblack@google.com "value smaller than time resolution"); 44613247Sgabeblack@google.com } 44712916Sgabeblack@google.com} 44812916Sgabeblack@google.com 44912916Sgabeblack@google.comsc_time 45012916Sgabeblack@google.comsc_get_default_time_unit() 45112916Sgabeblack@google.com{ 45213124Sgabeblack@google.com return sc_time(defaultUnit, SC_SEC); 45312916Sgabeblack@google.com} 45412916Sgabeblack@google.com 45513263Sgabeblack@google.comsc_time_tuple::sc_time_tuple(const sc_time &t) : 45613263Sgabeblack@google.com _value(), _unit(SC_SEC), _set(true) 45712927Sgabeblack@google.com{ 45813263Sgabeblack@google.com if (!t.value()) 45913263Sgabeblack@google.com return; 46013263Sgabeblack@google.com 46113263Sgabeblack@google.com Tick frequency = SimClock::Frequency; 46213263Sgabeblack@google.com 46313263Sgabeblack@google.com // Shrink the frequency by scaling down the time period, ie converting 46413263Sgabeblack@google.com // it from cycles per second to cycles per millisecond, etc. 46513263Sgabeblack@google.com while (_unit > 1 && (frequency % 1000 == 0)) { 46613263Sgabeblack@google.com _unit = (sc_time_unit)((int)_unit - 1); 46713263Sgabeblack@google.com frequency /= 1000; 46813263Sgabeblack@google.com } 46913263Sgabeblack@google.com 47013263Sgabeblack@google.com // Convert the frequency into a period. 47113263Sgabeblack@google.com Tick period; 47213263Sgabeblack@google.com if (frequency > 1) { 47313263Sgabeblack@google.com _unit = (sc_time_unit)((int)_unit - 1); 47413263Sgabeblack@google.com period = 1000 / frequency; 47513263Sgabeblack@google.com } else { 47613263Sgabeblack@google.com period = frequency; 47713263Sgabeblack@google.com } 47813263Sgabeblack@google.com 47913263Sgabeblack@google.com // Scale our integer value by the period. 48013263Sgabeblack@google.com _value = t.value() * period; 48113263Sgabeblack@google.com 48213263Sgabeblack@google.com // Shrink the scaled time value by increasing the size of the units 48313263Sgabeblack@google.com // it's measured by, avoiding fractional parts. 48413263Sgabeblack@google.com while (_unit < SC_SEC && (_value % 1000) == 0) { 48513263Sgabeblack@google.com _unit = (sc_time_unit)((int)_unit + 1); 48613263Sgabeblack@google.com _value /= 1000; 48713263Sgabeblack@google.com } 48812927Sgabeblack@google.com} 48912927Sgabeblack@google.com 49012927Sgabeblack@google.combool 49112927Sgabeblack@google.comsc_time_tuple::has_value() const 49212927Sgabeblack@google.com{ 49313263Sgabeblack@google.com return _set; 49412927Sgabeblack@google.com} 49512927Sgabeblack@google.com 49613263Sgabeblack@google.comsc_dt::uint64 sc_time_tuple::value() const { return _value; } 49712927Sgabeblack@google.com 49812927Sgabeblack@google.comconst char * 49912927Sgabeblack@google.comsc_time_tuple::unit_symbol() const 50012927Sgabeblack@google.com{ 50113263Sgabeblack@google.com return sc_gem5::TimeUnitNames[_unit]; 50212927Sgabeblack@google.com} 50312927Sgabeblack@google.com 50413263Sgabeblack@google.comdouble sc_time_tuple::to_double() const { return static_cast<double>(_value); } 50512927Sgabeblack@google.com 50612927Sgabeblack@google.comstd::string 50712927Sgabeblack@google.comsc_time_tuple::to_string() const 50812927Sgabeblack@google.com{ 50913263Sgabeblack@google.com std::ostringstream ss; 51013263Sgabeblack@google.com ss << _value << ' ' << unit_symbol(); 51113263Sgabeblack@google.com return ss.str(); 51212927Sgabeblack@google.com} 51312927Sgabeblack@google.com 51412837Sgabeblack@google.com} // namespace sc_core 515