sc_time.cc revision 12989
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 "base/types.hh" 32#include "python/pybind11/pybind.hh" 33#include "systemc/ext/core/sc_time.hh" 34 35namespace sc_core 36{ 37 38namespace 39{ 40 41const char *TimeUnitNames[] = { 42 [SC_FS] = "fs", 43 [SC_PS] = "ps", 44 [SC_NS] = "ns", 45 [SC_US] = "us", 46 [SC_MS] = "ms", 47 [SC_SEC] = "s" 48}; 49 50double TimeUnitScale[] = { 51 [SC_FS] = 1.0e-15, 52 [SC_PS] = 1.0e-12, 53 [SC_NS] = 1.0e-9, 54 [SC_US] = 1.0e-6, 55 [SC_MS] = 1.0e-3, 56 [SC_SEC] = 1.0 57}; 58 59void 60fixTimeResolution() 61{ 62 static bool fixed = false; 63 if (fixed) 64 return; 65 66 auto ticks = pybind11::module::import("m5.ticks"); 67 auto fix_global_frequency = ticks.attr("fixGlobalFrequency"); 68 fix_global_frequency(); 69 fixed = true; 70} 71 72} // anonymous namespace 73 74sc_time::sc_time() : val(0) {} 75 76sc_time::sc_time(double d, sc_time_unit tu) 77{ 78 val = 0; 79 if (d != 0) { 80 fixTimeResolution(); 81 //XXX Assuming the time resolution is 1ps. 82 double scale = TimeUnitScale[tu] / TimeUnitScale[SC_PS]; 83 // Accellera claims there is a linux bug, and that these next two 84 // lines work around them. 85 volatile double tmp = d * scale + 0.5; 86 val = static_cast<uint64_t>(tmp); 87 } 88} 89 90sc_time::sc_time(const sc_time &t) 91{ 92 val = t.val; 93} 94 95sc_time::sc_time(double, bool) 96{ 97 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 98} 99 100sc_time::sc_time(sc_dt::uint64, bool) 101{ 102 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 103} 104 105sc_time & 106sc_time::operator = (const sc_time &t) 107{ 108 val = t.val; 109 return *this; 110} 111 112sc_dt::uint64 113sc_time::value() const 114{ 115 return val; 116} 117 118double 119sc_time::to_double() const 120{ 121 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 122 return 0.0; 123} 124double 125sc_time::to_seconds() const 126{ 127 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 128 return 0.0; 129} 130 131const std::string 132sc_time::to_string() const 133{ 134 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 135 return ""; 136} 137 138bool 139sc_time::operator == (const sc_time &t) const 140{ 141 return val == t.val; 142} 143 144bool 145sc_time::operator != (const sc_time &t) const 146{ 147 return val != t.val; 148} 149 150bool 151sc_time::operator < (const sc_time &t) const 152{ 153 return val < t.val; 154} 155 156bool 157sc_time::operator <= (const sc_time &t) const 158{ 159 return val <= t.val; 160} 161 162bool 163sc_time::operator > (const sc_time &t) const 164{ 165 return val > t.val; 166} 167 168bool 169sc_time::operator >= (const sc_time &t) const 170{ 171 return val >= t.val; 172} 173 174sc_time & 175sc_time::operator += (const sc_time &t) 176{ 177 val += t.val; 178 return *this; 179} 180 181sc_time & 182sc_time::operator -= (const sc_time &t) 183{ 184 val -= t.val; 185 return *this; 186} 187 188sc_time & 189sc_time::operator *= (double) 190{ 191 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 192 return *this; 193} 194 195sc_time & 196sc_time::operator /= (double) 197{ 198 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 199 return *this; 200} 201 202void 203sc_time::print(std::ostream &os) const 204{ 205 if (val == 0) { 206 os << "0 s"; 207 } else { 208 //XXX Assuming the time resolution is 1ps. 209 sc_time_unit tu = SC_PS; 210 uint64_t scaled = val; 211 while (tu < SC_SEC && (scaled % 1000) == 0) { 212 tu = (sc_time_unit)((int)tu + 1); 213 scaled /= 1000; 214 } 215 216 os << scaled << ' ' << TimeUnitNames[tu]; 217 } 218} 219 220sc_time 221sc_time::from_value(sc_dt::uint64 u) 222{ 223 sc_time t; 224 t.val = u; 225 return t; 226} 227 228sc_time 229sc_time::from_seconds(double) 230{ 231 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 232 return sc_time(); 233} 234 235sc_time 236sc_time::from_string(const char *str) 237{ 238 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 239 return sc_time(); 240} 241 242const sc_time 243operator + (const sc_time &a, const sc_time &b) 244{ 245 return sc_time::from_value(a.value() + b.value()); 246} 247 248const sc_time 249operator - (const sc_time &a, const sc_time &b) 250{ 251 return sc_time::from_value(a.value() - b.value()); 252} 253 254const sc_time 255operator * (const sc_time &, double) 256{ 257 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 258 return sc_time(); 259} 260 261const sc_time 262operator * (double, const sc_time &) 263{ 264 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 265 return sc_time(); 266} 267 268const sc_time 269operator / (const sc_time &, double) 270{ 271 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 272 return sc_time(); 273} 274 275double 276operator / (const sc_time &, const sc_time &) 277{ 278 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 279 return 0.0; 280} 281 282std::ostream & 283operator << (std::ostream &os, const sc_time &t) 284{ 285 t.print(os); 286 return os; 287} 288 289const sc_time SC_ZERO_TIME; 290 291void 292sc_set_time_resolution(double, sc_time_unit) 293{ 294 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 295} 296 297sc_time 298sc_get_time_resolution() 299{ 300 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 301 return sc_time(); 302} 303 304const sc_time & 305sc_max_time() 306{ 307 static const sc_time MaxScTime = sc_time::from_value(MaxTick); 308 return MaxScTime; 309} 310 311void 312sc_set_default_time_unit(double, sc_time_unit) 313{ 314 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 315} 316 317sc_time 318sc_get_default_time_unit() 319{ 320 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 321 return *(sc_time *)nullptr; 322} 323 324sc_time_tuple::sc_time_tuple(const sc_time &) 325{ 326 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 327} 328 329bool 330sc_time_tuple::has_value() const 331{ 332 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 333 return false; 334} 335 336sc_dt::uint64 337sc_time_tuple::value() const 338{ 339 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 340 return 0; 341} 342 343const char * 344sc_time_tuple::unit_symbol() const 345{ 346 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 347 return ""; 348} 349 350double 351sc_time_tuple::to_double() const 352{ 353 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 354 return 0.0; 355} 356 357std::string 358sc_time_tuple::to_string() const 359{ 360 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 361 return ""; 362} 363 364} // namespace sc_core 365