sc_time.cc revision 12983
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 "systemc/ext/core/sc_time.hh" 32 33namespace sc_core 34{ 35 36namespace 37{ 38 39const char *TimeUnitNames[] = { 40 [SC_FS] = "fs", 41 [SC_PS] = "ps", 42 [SC_NS] = "ns", 43 [SC_US] = "us", 44 [SC_MS] = "ms", 45 [SC_SEC] = "s" 46}; 47 48double TimeUnitScale[] = { 49 [SC_FS] = 1.0e-15, 50 [SC_PS] = 1.0e-12, 51 [SC_NS] = 1.0e-9, 52 [SC_US] = 1.0e-6, 53 [SC_MS] = 1.0e-3, 54 [SC_SEC] = 1.0 55}; 56 57} // anonymous namespace 58 59sc_time::sc_time() : val(0) {} 60 61sc_time::sc_time(double d, sc_time_unit tu) 62{ 63 val = 0; 64 if (d != 0) { 65 //XXX Assuming the time resolution is 1ps. 66 double scale = TimeUnitScale[tu] / TimeUnitScale[SC_PS]; 67 // Accellera claims there is a linux bug, and that these next two 68 // lines work around them. 69 volatile double tmp = d * scale + 0.5; 70 val = static_cast<uint64_t>(tmp); 71 } 72} 73 74sc_time::sc_time(const sc_time &t) 75{ 76 val = t.val; 77} 78 79sc_time::sc_time(double, bool) 80{ 81 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 82} 83 84sc_time::sc_time(sc_dt::uint64, bool) 85{ 86 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 87} 88 89sc_time & 90sc_time::operator = (const sc_time &t) 91{ 92 val = t.val; 93 return *this; 94} 95 96sc_dt::uint64 97sc_time::value() const 98{ 99 return val; 100} 101 102double 103sc_time::to_double() const 104{ 105 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 106 return 0.0; 107} 108double 109sc_time::to_seconds() const 110{ 111 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 112 return 0.0; 113} 114 115const std::string 116sc_time::to_string() const 117{ 118 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 119 return ""; 120} 121 122bool 123sc_time::operator == (const sc_time &t) const 124{ 125 return val == t.val; 126} 127 128bool 129sc_time::operator != (const sc_time &t) const 130{ 131 return val != t.val; 132} 133 134bool 135sc_time::operator < (const sc_time &t) const 136{ 137 return val < t.val; 138} 139 140bool 141sc_time::operator <= (const sc_time &t) const 142{ 143 return val <= t.val; 144} 145 146bool 147sc_time::operator > (const sc_time &t) const 148{ 149 return val > t.val; 150} 151 152bool 153sc_time::operator >= (const sc_time &t) const 154{ 155 return val >= t.val; 156} 157 158sc_time & 159sc_time::operator += (const sc_time &t) 160{ 161 val += t.val; 162 return *this; 163} 164 165sc_time & 166sc_time::operator -= (const sc_time &t) 167{ 168 val -= t.val; 169 return *this; 170} 171 172sc_time & 173sc_time::operator *= (double) 174{ 175 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 176 return *this; 177} 178 179sc_time & 180sc_time::operator /= (double) 181{ 182 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 183 return *this; 184} 185 186void 187sc_time::print(std::ostream &os) const 188{ 189 if (val == 0) { 190 os << "0 s"; 191 } else { 192 //XXX Assuming the time resolution is 1ps. 193 sc_time_unit tu = SC_PS; 194 uint64_t scaled = val; 195 while (tu < SC_SEC && (scaled % 1000) == 0) { 196 tu = (sc_time_unit)((int)tu + 1); 197 scaled /= 1000; 198 } 199 200 os << scaled << ' ' << TimeUnitNames[tu]; 201 } 202} 203 204sc_time 205sc_time::from_value(sc_dt::uint64 u) 206{ 207 sc_time t; 208 t.val = u; 209 return t; 210} 211 212sc_time 213sc_time::from_seconds(double) 214{ 215 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 216 return sc_time(); 217} 218 219sc_time 220sc_time::from_string(const char *str) 221{ 222 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 223 return sc_time(); 224} 225 226const sc_time 227operator + (const sc_time &, const sc_time &) 228{ 229 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 230 return sc_time(); 231} 232 233const sc_time 234operator - (const sc_time &, const sc_time &) 235{ 236 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 237 return sc_time(); 238} 239 240const sc_time 241operator * (const sc_time &, double) 242{ 243 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 244 return sc_time(); 245} 246 247const sc_time 248operator * (double, const sc_time &) 249{ 250 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 251 return sc_time(); 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 261double 262operator / (const sc_time &, const sc_time &) 263{ 264 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 265 return 0.0; 266} 267 268std::ostream & 269operator << (std::ostream &os, const sc_time &t) 270{ 271 t.print(os); 272 return os; 273} 274 275const sc_time SC_ZERO_TIME; 276 277void 278sc_set_time_resolution(double, sc_time_unit) 279{ 280 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 281} 282 283sc_time 284sc_get_time_resolution() 285{ 286 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 287 return sc_time(); 288} 289 290const sc_time & 291sc_max_time() 292{ 293 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 294 return *(const sc_time *)nullptr; 295} 296 297void 298sc_set_default_time_unit(double, sc_time_unit) 299{ 300 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 301} 302 303sc_time 304sc_get_default_time_unit() 305{ 306 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 307 return *(sc_time *)nullptr; 308} 309 310sc_time_tuple::sc_time_tuple(const sc_time &) 311{ 312 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 313} 314 315bool 316sc_time_tuple::has_value() const 317{ 318 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 319 return false; 320} 321 322sc_dt::uint64 323sc_time_tuple::value() const 324{ 325 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 326 return 0; 327} 328 329const char * 330sc_time_tuple::unit_symbol() const 331{ 332 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 333 return ""; 334} 335 336double 337sc_time_tuple::to_double() const 338{ 339 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 340 return 0.0; 341} 342 343std::string 344sc_time_tuple::to_string() const 345{ 346 warn("%s not implemented.\n", __PRETTY_FUNCTION__); 347 return ""; 348} 349 350} // namespace sc_core 351