sc_time.cc revision 12986
1/* 2 * Copyright 2018 Google, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: redistributions of source code must retain the above copyright 7 * notice, this list of conditions and the following disclaimer; 8 * redistributions in binary form must reproduce the above copyright 9 * notice, this list of conditions and the following disclaimer in the 10 * documentation and/or other materials provided with the distribution; 11 * neither the name of the copyright holders nor the names of its 12 * contributors may be used to endorse or promote products derived from 13 * this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * Authors: Gabe Black 28 */ 29 30#include "base/logging.hh" 31#include "python/pybind11/pybind.hh" 32#include "systemc/ext/core/sc_time.hh" 33 34namespace sc_core 35{ 36 37namespace 38{ 39 40const char *TimeUnitNames[] = { 41 [SC_FS] = "fs", 42 [SC_PS] = "ps", 43 [SC_NS] = "ns", 44 [SC_US] = "us", 45 [SC_MS] = "ms", 46 [SC_SEC] = "s" 47}; 48 49double TimeUnitScale[] = { 50 [SC_FS] = 1.0e-15, 51 [SC_PS] = 1.0e-12, 52 [SC_NS] = 1.0e-9, 53 [SC_US] = 1.0e-6, 54 [SC_MS] = 1.0e-3, 55 [SC_SEC] = 1.0 56}; 57 58void 59fixTimeResolution() 60{ 61 static bool fixed = false; 62 if (fixed) 63 return; 64 65 auto ticks = pybind11::module::import("m5.ticks"); 66 auto fix_global_frequency = ticks.attr("fixGlobalFrequency"); 67 fix_global_frequency(); 68 fixed = true; 69} 70 71} // anonymous namespace 72 73sc_time::sc_time() : val(0) {} 74 75sc_time::sc_time(double d, sc_time_unit tu) 76{ 77 val = 0; 78 if (d != 0) { 79 fixTimeResolution(); 80 //XXX Assuming the time resolution is 1ps. 81 double scale = TimeUnitScale[tu] / TimeUnitScale[SC_PS]; 82 // Accellera claims there is a linux bug, and that these next two 83 // lines work around them. 84 volatile double tmp = d * scale + 0.5; 85 val = static_cast<uint64_t>(tmp); 86 } 87} 88 89sc_time::sc_time(const sc_time &t) 90{ 91 val = t.val; 92} 93 94sc_time::sc_time(double, bool) 95{ 96 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 97} 98 99sc_time::sc_time(sc_dt::uint64, bool) 100{ 101 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 102} 103 104sc_time & 105sc_time::operator = (const sc_time &t) 106{ 107 val = t.val; 108 return *this; 109} 110 111sc_dt::uint64 112sc_time::value() const 113{ 114 return val; 115} 116 117double 118sc_time::to_double() const 119{ 120 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 121 return 0.0; 122} 123double 124sc_time::to_seconds() const 125{ 126 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 127 return 0.0; 128} 129 130const std::string 131sc_time::to_string() const 132{ 133 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 134 return ""; 135} 136 137bool 138sc_time::operator == (const sc_time &t) const 139{ 140 return val == t.val; 141} 142 143bool 144sc_time::operator != (const sc_time &t) const 145{ 146 return val != t.val; 147} 148 149bool 150sc_time::operator < (const sc_time &t) const 151{ 152 return val < t.val; 153} 154 155bool 156sc_time::operator <= (const sc_time &t) const 157{ 158 return val <= t.val; 159} 160 161bool 162sc_time::operator > (const sc_time &t) const 163{ 164 return val > t.val; 165} 166 167bool 168sc_time::operator >= (const sc_time &t) const 169{ 170 return val >= t.val; 171} 172 173sc_time & 174sc_time::operator += (const sc_time &t) 175{ 176 val += t.val; 177 return *this; 178} 179 180sc_time & 181sc_time::operator -= (const sc_time &t) 182{ 183 val -= t.val; 184 return *this; 185} 186 187sc_time & 188sc_time::operator *= (double) 189{ 190 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 191 return *this; 192} 193 194sc_time & 195sc_time::operator /= (double) 196{ 197 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 198 return *this; 199} 200 201void 202sc_time::print(std::ostream &os) const 203{ 204 if (val == 0) { 205 os << "0 s"; 206 } else { 207 //XXX Assuming the time resolution is 1ps. 208 sc_time_unit tu = SC_PS; 209 uint64_t scaled = val; 210 while (tu < SC_SEC && (scaled % 1000) == 0) { 211 tu = (sc_time_unit)((int)tu + 1); 212 scaled /= 1000; 213 } 214 215 os << scaled << ' ' << TimeUnitNames[tu]; 216 } 217} 218 219sc_time 220sc_time::from_value(sc_dt::uint64 u) 221{ 222 sc_time t; 223 t.val = u; 224 return t; 225} 226 227sc_time 228sc_time::from_seconds(double) 229{ 230 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 231 return sc_time(); 232} 233 234sc_time 235sc_time::from_string(const char *str) 236{ 237 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 238 return sc_time(); 239} 240 241const sc_time 242operator + (const sc_time &, const sc_time &) 243{ 244 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 245 return sc_time(); 246} 247 248const sc_time 249operator - (const sc_time &, const sc_time &) 250{ 251 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 252 return sc_time(); 253} 254 255const sc_time 256operator * (const sc_time &, double) 257{ 258 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 259 return sc_time(); 260} 261 262const sc_time 263operator * (double, const sc_time &) 264{ 265 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 266 return sc_time(); 267} 268 269const sc_time 270operator / (const sc_time &, double) 271{ 272 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 273 return sc_time(); 274} 275 276double 277operator / (const sc_time &, const sc_time &) 278{ 279 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 280 return 0.0; 281} 282 283std::ostream & 284operator << (std::ostream &os, const sc_time &t) 285{ 286 t.print(os); 287 return os; 288} 289 290const sc_time SC_ZERO_TIME; 291 292void 293sc_set_time_resolution(double, sc_time_unit) 294{ 295 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 296} 297 298sc_time 299sc_get_time_resolution() 300{ 301 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 302 return sc_time(); 303} 304 305const sc_time & 306sc_max_time() 307{ 308 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 309 return *(const sc_time *)nullptr; 310} 311 312void 313sc_set_default_time_unit(double, sc_time_unit) 314{ 315 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 316} 317 318sc_time 319sc_get_default_time_unit() 320{ 321 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 322 return *(sc_time *)nullptr; 323} 324 325sc_time_tuple::sc_time_tuple(const sc_time &) 326{ 327 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 328} 329 330bool 331sc_time_tuple::has_value() const 332{ 333 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 334 return false; 335} 336 337sc_dt::uint64 338sc_time_tuple::value() const 339{ 340 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 341 return 0; 342} 343 344const char * 345sc_time_tuple::unit_symbol() const 346{ 347 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 348 return ""; 349} 350 351double 352sc_time_tuple::to_double() const 353{ 354 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 355 return 0.0; 356} 357 358std::string 359sc_time_tuple::to_string() const 360{ 361 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 362 return ""; 363} 364 365} // namespace sc_core 366