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

--- 19 unchanged lines hidden (view full) ---

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}

--- 7 unchanged lines hidden (view full) ---

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}

--- 43 unchanged lines hidden (view full) ---

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{

--- 71 unchanged lines hidden ---