aboutsummaryrefslogtreecommitdiffstats
path: root/docs/make.bat
blob: 905288d878d143cf7e58cdb4cc51e3ee7d55c847 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
@ECHO OFF

REM Command file for Sphinx documentation

if "%SPHINXBUILD%" == "" (
	set SPHINXBUILD=sphinx-build
)
set BUILDDIR=_build
set ALLSPHINXOPTS=-d %BUILDDIR%/doctrees %SPHINXOPTS% .
set I18NSPHINXOPTS=%SPHINXOPTS% .
if NOT "%PAPER%" == "" (
	set ALLSPHINXOPTS=-D latex_paper_size=%PAPER% %ALLSPHINXOPTS%
	set I18NSPHINXOPTS=-D latex_paper_size=%PAPER% %I18NSPHINXOPTS%
)

if "%1" == "" goto help

if "%1" == "help" (
	:help
	echo.Please use `make ^<target^>` where ^<target^> is one of
	echo.  html       to make standalone HTML files
	echo.  dirhtml    to make HTML files named index.html in directories
	echo.  singlehtml to make a single large HTML file
	echo.  pickle     to make pickle files
	echo.  json       to make JSON files
	echo.  htmlhelp   to make HTML files and a HTML help project
	echo.  qthelp     to make HTML files and a qthelp project
	echo.  devhelp    to make HTML files and a Devhelp project
	echo.  epub       to make an epub
	echo.  latex      to make LaTeX files, you can set PAPER=a4 or PAPER=letter
	echo.  text       to make text files
	echo.  man        to make manual pages
	echo.  texinfo    to make Texinfo files
	echo.  gettext    to make PO message catalogs
	echo.  changes    to make an overview over all changed/added/deprecated items
	echo.  linkcheck  to check all external links for integrity
	echo.  doctest    to run all doctests embedded in the documentation if enabled
	goto end
)

if "%1" == "clean" (
	for /d %%i in (%BUILDDIR%\*) do rmdir /q /s %%i
	del /q /s %BUILDDIR%\*
	goto end
)

if "%1" == "html" (
	%SPHINXBUILD% -b html %ALLSPHINXOPTS% %BUILDDIR%/html
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished. The HTML pages are in %BUILDDIR%/html.
	goto end
)

if "%1" == "dirhtml" (
	%SPHINXBUILD% -b dirhtml %ALLSPHINXOPTS% %BUILDDIR%/dirhtml
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished. The HTML pages are in %BUILDDIR%/dirhtml.
	goto end
)

if "%1" == "singlehtml" (
	%SPHINXBUILD% -b singlehtml %ALLSPHINXOPTS% %BUILDDIR%/singlehtml
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished. The HTML pages are in %BUILDDIR%/singlehtml.
	goto end
)

if "%1" == "pickle" (
	%SPHINXBUILD% -b pickle %ALLSPHINXOPTS% %BUILDDIR%/pickle
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished; now you can process the pickle files.
	goto end
)

if "%1" == "json" (
	%SPHINXBUILD% -b json %ALLSPHINXOPTS% %BUILDDIR%/json
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished; now you can process the JSON files.
	goto end
)

if "%1" == "htmlhelp" (
	%SPHINXBUILD% -b htmlhelp %ALLSPHINXOPTS% %BUILDDIR%/htmlhelp
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished; now you can run HTML Help Workshop with the ^
.hhp project file in %BUILDDIR%/htmlhelp.
	goto end
)

if "%1" == "qthelp" (
	%SPHINXBUILD% -b qthelp %ALLSPHINXOPTS% %BUILDDIR%/qthelp
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished; now you can run "qcollectiongenerator" with the ^
.qhcp project file in %BUILDDIR%/qthelp, like this:
	echo.^> qcollectiongenerator %BUILDDIR%\qthelp\Cryptography.qhcp
	echo.To view the help file:
	echo.^> assistant -collectionFile %BUILDDIR%\qthelp\Cryptography.ghc
	goto end
)

if "%1" == "devhelp" (
	%SPHINXBUILD% -b devhelp %ALLSPHINXOPTS% %BUILDDIR%/devhelp
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished.
	goto end
)

if "%1" == "epub" (
	%SPHINXBUILD% -b epub %ALLSPHINXOPTS% %BUILDDIR%/epub
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished. The epub file is in %BUILDDIR%/epub.
	goto end
)

if "%1" == "latex" (
	%SPHINXBUILD% -b latex %ALLSPHINXOPTS% %BUILDDIR%/latex
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished; the LaTeX files are in %BUILDDIR%/latex.
	goto end
)

if "%1" == "text" (
	%SPHINXBUILD% -b text %ALLSPHINXOPTS% %BUILDDIR%/text
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished. The text files are in %BUILDDIR%/text.
	goto end
)

if "%1" == "man" (
	%SPHINXBUILD% -b man %ALLSPHINXOPTS% %BUILDDIR%/man
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished. The manual pages are in %BUILDDIR%/man.
	goto end
)

if "%1" == "texinfo" (
	%SPHINXBUILD% -b texinfo %ALLSPHINXOPTS% %BUILDDIR%/texinfo
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished. The Texinfo files are in %BUILDDIR%/texinfo.
	goto end
)

if "%1" == "gettext" (
	%SPHINXBUILD% -b gettext %I18NSPHINXOPTS% %BUILDDIR%/locale
	if errorlevel 1 exit /b 1
	echo.
	echo.Build finished. The message catalogs are in %BUILDDIR%/locale.
	goto end
)

if "%1" == "changes" (
	%SPHINXBUILD% -b changes %ALLSPHINXOPTS% %BUILDDIR%/changes
	if errorlevel 1 exit /b 1
	echo.
	echo.The overview file is in %BUILDDIR%/changes.
	goto end
)

if "%1" == "linkcheck" (
	%SPHINXBUILD% -b linkcheck %ALLSPHINXOPTS% %BUILDDIR%/linkcheck
	if errorlevel 1 exit /b 1
	echo.
	echo.Link check complete; look for any errors in the above output ^
or in %BUILDDIR%/linkcheck/output.txt.
	goto end
)

if "%1" == "doctest" (
	%SPHINXBUILD% -b doctest %ALLSPHINXOPTS% %BUILDDIR%/doctest
	if errorlevel 1 exit /b 1
	echo.
	echo.Testing of doctests in the sources finished, look at the ^
results in %BUILDDIR%/doctest/output.txt.
	goto end
)

:end
' href='#n846'>846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611
/* -*- c++ -*-
 *  yosys -- Yosys Open SYnthesis Suite
 *
 *  Copyright (C) 2012  Clifford Wolf <clifford@clifford.at>
 *
 *  Permission to use, copy, modify, and/or distribute this software for any
 *  purpose with or without fee is hereby granted, provided that the above
 *  copyright notice and this permission notice appear in all copies.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */

#include "kernel/yosys.h"

#ifndef RTLIL_H
#define RTLIL_H

YOSYS_NAMESPACE_BEGIN

namespace RTLIL
{
	enum State : unsigned char {
		S0 = 0,
		S1 = 1,
		Sx = 2, // undefined value or conflict
		Sz = 3, // high-impedance / not-connected
		Sa = 4, // don't care (used only in cases)
		Sm = 5  // marker (used internally by some passes)
	};

	enum SyncType : unsigned char {
		ST0 = 0, // level sensitive: 0
		ST1 = 1, // level sensitive: 1
		STp = 2, // edge sensitive: posedge
		STn = 3, // edge sensitive: negedge
		STe = 4, // edge sensitive: both edges
		STa = 5, // always active
		STg = 6, // global clock
		STi = 7  // init
	};

	enum ConstFlags : unsigned char {
		CONST_FLAG_NONE   = 0,
		CONST_FLAG_STRING = 1,
		CONST_FLAG_SIGNED = 2,  // only used for parameters
		CONST_FLAG_REAL   = 4   // only used for parameters
	};

	struct Const;
	struct AttrObject;
	struct Selection;
	struct Monitor;
	struct Design;
	struct Module;
	struct Wire;
	struct Memory;
	struct Cell;
	struct SigChunk;
	struct SigBit;
	struct SigSpecIterator;
	struct SigSpecConstIterator;
	struct SigSpec;
	struct CaseRule;
	struct SwitchRule;
	struct SyncRule;
	struct Process;

	typedef std::pair<SigSpec, SigSpec> SigSig;

	struct IdString
	{
		#undef YOSYS_XTRACE_GET_PUT
		#undef YOSYS_SORT_ID_FREE_LIST
		#undef YOSYS_USE_STICKY_IDS
		#undef YOSYS_NO_IDS_REFCNT

		// the global id string cache

		static struct destruct_guard_t {
			bool ok; // POD, will be initialized to zero
			destruct_guard_t() { ok = true; }
			~destruct_guard_t() { ok = false; }
		} destruct_guard;

		static std::vector<char*> global_id_storage_;
		static dict<char*, int, hash_cstr_ops> global_id_index_;
	#ifndef YOSYS_NO_IDS_REFCNT
		static std::vector<int> global_refcount_storage_;
		static std::vector<int> global_free_idx_list_;
	#endif

	#ifdef YOSYS_USE_STICKY_IDS
		static int last_created_idx_ptr_;
		static int last_created_idx_[8];
	#endif

		static inline void xtrace_db_dump()
		{
		#ifdef YOSYS_XTRACE_GET_PUT
			for (int idx = 0; idx < GetSize(global_id_storage_); idx++)
			{
				if (global_id_storage_.at(idx) == nullptr)
					log("#X# DB-DUMP index %d: FREE\n", idx);
				else
					log("#X# DB-DUMP index %d: '%s' (ref %d)\n", idx, global_id_storage_.at(idx), global_refcount_storage_.at(idx));
			}
		#endif
		}

		static inline void checkpoint()
		{
		#ifdef YOSYS_USE_STICKY_IDS
			last_created_idx_ptr_ = 0;
			for (int i = 0; i < 8; i++) {
				if (last_created_idx_[i])
					put_reference(last_created_idx_[i]);
				last_created_idx_[i] = 0;
			}
		#endif
		#ifdef YOSYS_SORT_ID_FREE_LIST
			std::sort(global_free_idx_list_.begin(), global_free_idx_list_.end(), std::greater<int>());
		#endif
		}

		static inline int get_reference(int idx)
		{
			if (idx) {
		#ifndef YOSYS_NO_IDS_REFCNT
				global_refcount_storage_[idx]++;
		#endif
		#ifdef YOSYS_XTRACE_GET_PUT
				if (yosys_xtrace)
					log("#X# GET-BY-INDEX '%s' (index %d, refcount %d)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
		#endif
			}
			return idx;
		}

		static int get_reference(const char *p)
		{
			log_assert(destruct_guard.ok);

			if (!p[0])
				return 0;

			log_assert(p[0] == '$' || p[0] == '\\');
			log_assert(p[1] != 0);

			auto it = global_id_index_.find((char*)p);
			if (it != global_id_index_.end()) {
		#ifndef YOSYS_NO_IDS_REFCNT
				global_refcount_storage_.at(it->second)++;
		#endif
		#ifdef YOSYS_XTRACE_GET_PUT
				if (yosys_xtrace)
					log("#X# GET-BY-NAME '%s' (index %d, refcount %d)\n", global_id_storage_.at(it->second), it->second, global_refcount_storage_.at(it->second));
		#endif
				return it->second;
			}

		#ifndef YOSYS_NO_IDS_REFCNT
			if (global_free_idx_list_.empty()) {
				if (global_id_storage_.empty()) {
					global_refcount_storage_.push_back(0);
					global_id_storage_.push_back((char*)"");
					global_id_index_[global_id_storage_.back()] = 0;
				}
				log_assert(global_id_storage_.size() < 0x40000000);
				global_free_idx_list_.push_back(global_id_storage_.size());
				global_id_storage_.push_back(nullptr);
				global_refcount_storage_.push_back(0);
			}

			int idx = global_free_idx_list_.back();
			global_free_idx_list_.pop_back();
			global_id_storage_.at(idx) = strdup(p);
			global_id_index_[global_id_storage_.at(idx)] = idx;
			global_refcount_storage_.at(idx)++;
		#else
			if (global_id_storage_.empty()) {
				global_id_storage_.push_back((char*)"");
				global_id_index_[global_id_storage_.back()] = 0;
			}
			int idx = global_id_storage_.size();
			global_id_storage_.push_back(strdup(p));
			global_id_index_[global_id_storage_.back()] = idx;
		#endif

			if (yosys_xtrace) {
				log("#X# New IdString '%s' with index %d.\n", p, idx);
				log_backtrace("-X- ", yosys_xtrace-1);
			}

		#ifdef YOSYS_XTRACE_GET_PUT
			if (yosys_xtrace)
				log("#X# GET-BY-NAME '%s' (index %d, refcount %d)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
		#endif

		#ifdef YOSYS_USE_STICKY_IDS
			// Avoid Create->Delete->Create pattern
			if (last_created_idx_[last_created_idx_ptr_])
				put_reference(last_created_idx_[last_created_idx_ptr_]);
			last_created_idx_[last_created_idx_ptr_] = idx;
			get_reference(last_created_idx_[last_created_idx_ptr_]);
			last_created_idx_ptr_ = (last_created_idx_ptr_ + 1) & 7;
		#endif

			return idx;
		}

	#ifndef YOSYS_NO_IDS_REFCNT
		static inline void put_reference(int idx)
		{
			// put_reference() may be called from destructors after the destructor of
			// global_refcount_storage_ has been run. in this case we simply do nothing.
			if (!destruct_guard.ok || !idx)
				return;

		#ifdef YOSYS_XTRACE_GET_PUT
			if (yosys_xtrace) {
				log("#X# PUT '%s' (index %d, refcount %d)\n", global_id_storage_.at(idx), idx, global_refcount_storage_.at(idx));
			}
		#endif

			int &refcount = global_refcount_storage_[idx];

			if (--refcount > 0)
				return;

			log_assert(refcount == 0);

			if (yosys_xtrace) {
				log("#X# Removed IdString '%s' with index %d.\n", global_id_storage_.at(idx), idx);
				log_backtrace("-X- ", yosys_xtrace-1);
			}

			global_id_index_.erase(global_id_storage_.at(idx));
			free(global_id_storage_.at(idx));
			global_id_storage_.at(idx) = nullptr;
			global_free_idx_list_.push_back(idx);
		}
	#else
		static inline void put_reference(int) { }
	#endif

		// the actual IdString object is just is a single int

		int index_;

		inline IdString() : index_(0) { }
		inline IdString(const char *str) : index_(get_reference(str)) { }
		inline IdString(const IdString &str) : index_(get_reference(str.index_)) { }
		inline IdString(IdString &&str) : index_(str.index_) { str.index_ = 0; }
		inline IdString(const std::string &str) : index_(get_reference(str.c_str())) { }
		inline ~IdString() { put_reference(index_); }

		inline void operator=(const IdString &rhs) {
			put_reference(index_);
			index_ = get_reference(rhs.index_);
		}

		inline void operator=(const char *rhs) {
			IdString id(rhs);
			*this = id;
		}

		inline void operator=(const std::string &rhs) {
			IdString id(rhs);
			*this = id;
		}

		inline const char *c_str() const {
			return global_id_storage_.at(index_);
		}

		inline std::string str() const {
			return std::string(global_id_storage_.at(index_));
		}

		inline bool operator<(const IdString &rhs) const {
			return index_ < rhs.index_;
		}

		inline bool operator==(const IdString &rhs) const { return index_ == rhs.index_; }
		inline bool operator!=(const IdString &rhs) const { return index_ != rhs.index_; }

		// The methods below are just convenience functions for better compatibility with std::string.

		bool operator==(const std::string &rhs) const { return str() == rhs; }
		bool operator!=(const std::string &rhs) const { return str() != rhs; }

		bool operator==(const char *rhs) const { return strcmp(c_str(), rhs) == 0; }
		bool operator!=(const char *rhs) const { return strcmp(c_str(), rhs) != 0; }

		char operator[](size_t i) const {
			const char *p = c_str();
			for (; i != 0; i--, p++)
				log_assert(*p != 0);
			return *p;
		}

		std::string substr(size_t pos = 0, size_t len = std::string::npos) const {
			if (len == std::string::npos || len >= strlen(c_str() + pos))
				return std::string(c_str() + pos);
			else
				return std::string(c_str() + pos, len);
		}

		int compare(size_t pos, size_t len, const char* s) const {
			return strncmp(c_str()+pos, s, len);
		}

		bool begins_with(const char* prefix) const {
			size_t len = strlen(prefix);
			if (size() < len) return false;
			return compare(0, len, prefix) == 0;
		}

		bool ends_with(const char* suffix) const {
			size_t len = strlen(suffix);
			if (size() < len) return false;
			return compare(size()-len, len, suffix) == 0;
		}

		size_t size() const {
			return strlen(c_str());
		}

		bool empty() const {
			return c_str()[0] == 0;
		}

		void clear() {
			*this = IdString();
		}

		unsigned int hash() const {
			return index_;
		}

		// The following is a helper key_compare class. Instead of for example std::set<Cell*>
		// use std::set<Cell*, IdString::compare_ptr_by_name<Cell>> if the order of cells in the
		// set has an influence on the algorithm.

		template<typename T> struct compare_ptr_by_name {
			bool operator()(const T *a, const T *b) const {
				return (a == nullptr || b == nullptr) ? (a < b) : (a->name < b->name);
			}
		};

		// often one needs to check if a given IdString is part of a list (for example a list
		// of cell types). the following functions helps with that.

		template<typename T, typename... Args>
		bool in(T first, Args... rest) const {
			return in(first) || in(rest...);
		}

		bool in(IdString rhs) const { return *this == rhs; }
		bool in(const char *rhs) const { return *this == rhs; }
		bool in(const std::string &rhs) const { return *this == rhs; }
		bool in(const pool<IdString> &rhs) const { return rhs.count(*this) != 0; }
	};

	namespace ID {
		// defined in rtlil.cc, initialized in yosys.cc
		extern IdString A, B, Y;
		extern IdString keep;
		extern IdString whitebox;
		extern IdString blackbox;
	};

	static inline std::string escape_id(std::string str) {
		if (str.size() > 0 && str[0] != '\\' && str[0] != '$')
			return "\\" + str;
		return str;
	}

	static inline std::string unescape_id(std::string str) {
		if (str.size() < 2)
			return str;
		if (str[0] != '\\')
			return str;
		if (str[1] == '$' || str[1] == '\\')
			return str;
		if (str[1] >= '0' && str[1] <= '9')
			return str;
		return str.substr(1);
	}

	static inline std::string unescape_id(RTLIL::IdString str) {
		return unescape_id(str.str());
	}

	static inline const char *id2cstr(const RTLIL::IdString &str) {
		return log_id(str);
	}

	template <typename T> struct sort_by_name_id {
		bool operator()(T *a, T *b) const {
			return a->name < b->name;
		}
	};

	template <typename T> struct sort_by_name_str {
		bool operator()(T *a, T *b) const {
			return strcmp(a->name.c_str(), b->name.c_str()) < 0;
		}
	};

	struct sort_by_id_str {
		bool operator()(RTLIL::IdString a, RTLIL::IdString b) const {
			return strcmp(a.c_str(), b.c_str()) < 0;
		}
	};

	// see calc.cc for the implementation of this functions
	RTLIL::Const const_not         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_and         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_or          (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_xor         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_xnor        (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);

	RTLIL::Const const_reduce_and  (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_reduce_or   (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_reduce_xor  (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_reduce_xnor (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_reduce_bool (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);

	RTLIL::Const const_logic_not   (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_logic_and   (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_logic_or    (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);

	RTLIL::Const const_shl         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_shr         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_sshl        (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_sshr        (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_shift       (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_shiftx      (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);

	RTLIL::Const const_lt          (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_le          (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_eq          (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_ne          (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_eqx         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_nex         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_ge          (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_gt          (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);

	RTLIL::Const const_add         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_sub         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_mul         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_div         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_mod         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_pow         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);

	RTLIL::Const const_pos         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);
	RTLIL::Const const_neg         (const RTLIL::Const &arg1, const RTLIL::Const &arg2, bool signed1, bool signed2, int result_len);


	// This iterator-range-pair is used for Design::modules(), Module::wires() and Module::cells().
	// It maintains a reference counter that is used to make sure that the container is not modified while being iterated over.

	template<typename T>
	struct ObjIterator {
		using iterator_category = std::forward_iterator_tag;
		using value_type = T;
		using difference_type = ptrdiff_t;
		using pointer = T*;
		using reference = T&;
		typename dict<RTLIL::IdString, T>::iterator it;
		dict<RTLIL::IdString, T> *list_p;
		int *refcount_p;

		ObjIterator() : list_p(nullptr), refcount_p(nullptr) {
		}

		ObjIterator(decltype(list_p) list_p, int *refcount_p) : list_p(list_p), refcount_p(refcount_p) {
			if (list_p->empty()) {
				this->list_p = nullptr;
				this->refcount_p = nullptr;
			} else {
				it = list_p->begin();
				(*refcount_p)++;
			}
		}

		ObjIterator(const RTLIL::ObjIterator<T> &other) {
			it = other.it;
			list_p = other.list_p;
			refcount_p = other.refcount_p;
			if (refcount_p)
				(*refcount_p)++;
		}

		ObjIterator &operator=(const RTLIL::ObjIterator<T> &other) {
			if (refcount_p)
				(*refcount_p)--;
			it = other.it;
			list_p = other.list_p;
			refcount_p = other.refcount_p;
			if (refcount_p)
				(*refcount_p)++;
			return *this;
		}

		~ObjIterator() {
			if (refcount_p)
				(*refcount_p)--;
		}

		inline T operator*() const {
			log_assert(list_p != nullptr);
			return it->second;
		}

		inline bool operator!=(const RTLIL::ObjIterator<T> &other) const {
			if (list_p == nullptr || other.list_p == nullptr)
				return list_p != other.list_p;
			return it != other.it;
		}


		inline bool operator==(const RTLIL::ObjIterator<T> &other) const {
			return !(*this != other);
		}

		inline ObjIterator<T>& operator++() {
			log_assert(list_p != nullptr);
			if (++it == list_p->end()) {
				(*refcount_p)--;
				list_p = nullptr;
				refcount_p = nullptr;
			}
			return *this;
		}

		inline const ObjIterator<T> operator++(int) {
			ObjIterator<T> result(*this);
			++(*this);
			return result;
		}
	};

	template<typename T>
	struct ObjRange
	{
		dict<RTLIL::IdString, T> *list_p;
		int *refcount_p;

		ObjRange(decltype(list_p) list_p, int *refcount_p) : list_p(list_p), refcount_p(refcount_p) { }
		RTLIL::ObjIterator<T> begin() { return RTLIL::ObjIterator<T>(list_p, refcount_p); }
		RTLIL::ObjIterator<T> end() { return RTLIL::ObjIterator<T>(); }

		size_t size() const {
			return list_p->size();
		}

		operator pool<T>() const {
			pool<T> result;
			for (auto &it : *list_p)
				result.insert(it.second);
			return result;
		}

		operator std::vector<T>() const {
			std::vector<T> result;
			result.reserve(list_p->size());
			for (auto &it : *list_p)
				result.push_back(it.second);
			return result;
		}

		pool<T> to_pool() const { return *this; }
		std::vector<T> to_vector() const { return *this; }
	};
};

struct RTLIL::Const
{
	int flags;
	std::vector<RTLIL::State> bits;

	Const();
	Const(std::string str);
	Const(int val, int width = 32);
	Const(RTLIL::State bit, int width = 1);
	Const(const std::vector<RTLIL::State> &bits) : bits(bits) { flags = CONST_FLAG_NONE; }
	Const(const std::vector<bool> &bits);
	Const(const RTLIL::Const &c);
	RTLIL::Const &operator =(const RTLIL::Const &other) = default;

	bool operator <(const RTLIL::Const &other) const;
	bool operator ==(const RTLIL::Const &other) const;
	bool operator !=(const RTLIL::Const &other) const;

	bool as_bool() const;
	int as_int(bool is_signed = false) const;
	std::string as_string() const;
	static Const from_string(std::string str);

	std::string decode_string() const;

	inline int size() const { return bits.size(); }
	inline RTLIL::State &operator[](int index) { return bits.at(index); }
	inline const RTLIL::State &operator[](int index) const { return bits.at(index); }

	bool is_fully_zero() const;
	bool is_fully_ones() const;
	bool is_fully_def() const;
	bool is_fully_undef() const;

	inline RTLIL::Const extract(int offset, int len = 1, RTLIL::State padding = RTLIL::State::S0) const {
		RTLIL::Const ret;
		ret.bits.reserve(len);
		for (int i = offset; i < offset + len; i++)
			ret.bits.push_back(i < GetSize(bits) ? bits[i] : padding);
		return ret;
	}

	void extu(int width) {
		bits.resize(width, RTLIL::State::S0);
	}

	void exts(int width) {
		bits.resize(width, bits.empty() ? RTLIL::State::Sx : bits.back());
	}

	inline unsigned int hash() const {
		unsigned int h = mkhash_init;
		for (auto b : bits)
			mkhash(h, b);
		return h;
	}
};

struct RTLIL::AttrObject
{
	dict<RTLIL::IdString, RTLIL::Const> attributes;

	void set_bool_attribute(RTLIL::IdString id, bool value=true);
	bool get_bool_attribute(RTLIL::IdString id) const;

	bool get_blackbox_attribute(bool ignore_wb=false) const {
		return get_bool_attribute(ID::blackbox) || (!ignore_wb && get_bool_attribute(ID::whitebox));
	}

	void set_strpool_attribute(RTLIL::IdString id, const pool<string> &data);
	void add_strpool_attribute(RTLIL::IdString id, const pool<string> &data);
	pool<string> get_strpool_attribute(RTLIL::IdString id) const;

	void set_src_attribute(const std::string &src);
	std::string get_src_attribute() const;
};

struct RTLIL::SigChunk
{
	RTLIL::Wire *wire;
	std::vector<RTLIL::State> data; // only used if wire == NULL, LSB at index 0
	int width, offset;

	SigChunk();
	SigChunk(const RTLIL::Const &value);
	SigChunk(RTLIL::Wire *wire);
	SigChunk(RTLIL::Wire *wire, int offset, int width = 1);
	SigChunk(const std::string &str);
	SigChunk(int val, int width = 32);
	SigChunk(RTLIL::State bit, int width = 1);
	SigChunk(RTLIL::SigBit bit);
	SigChunk(const RTLIL::SigChunk &sigchunk);
	RTLIL::SigChunk &operator =(const RTLIL::SigChunk &other) = default;

	RTLIL::SigChunk extract(int offset, int length) const;
	inline int size() const { return width; }

	bool operator <(const RTLIL::SigChunk &other) const;
	bool operator ==(const RTLIL::SigChunk &other) const;
	bool operator !=(const RTLIL::SigChunk &other) const;
};

struct RTLIL::SigBit
{
	RTLIL::Wire *wire;
	union {
		RTLIL::State data; // used if wire == NULL
		int offset;        // used if wire != NULL
	};

	SigBit();
	SigBit(RTLIL::State bit);
	SigBit(bool bit);
	SigBit(RTLIL::Wire *wire);
	SigBit(RTLIL::Wire *wire, int offset);
	SigBit(const RTLIL::SigChunk &chunk);
	SigBit(const RTLIL::SigChunk &chunk, int index);
	SigBit(const RTLIL::SigSpec &sig);
	SigBit(const RTLIL::SigBit &sigbit);
	RTLIL::SigBit &operator =(const RTLIL::SigBit &other) = default;

	bool operator <(const RTLIL::SigBit &other) const;
	bool operator ==(const RTLIL::SigBit &other) const;
	bool operator !=(const RTLIL::SigBit &other) const;
	unsigned int hash() const;
};

struct RTLIL::SigSpecIterator : public std::iterator<std::input_iterator_tag, RTLIL::SigSpec>
{
	RTLIL::SigSpec *sig_p;
	int index;

	inline RTLIL::SigBit &operator*() const;
	inline bool operator!=(const RTLIL::SigSpecIterator &other) const { return index != other.index; }
	inline bool operator==(const RTLIL::SigSpecIterator &other) const { return index == other.index; }
	inline void operator++() { index++; }
};

struct RTLIL::SigSpecConstIterator : public std::iterator<std::input_iterator_tag, RTLIL::SigSpec>
{
	const RTLIL::SigSpec *sig_p;
	int index;

	inline const RTLIL::SigBit &operator*() const;
	inline bool operator!=(const RTLIL::SigSpecConstIterator &other) const { return index != other.index; }
	inline bool operator==(const RTLIL::SigSpecIterator &other) const { return index == other.index; }
	inline void operator++() { index++; }
};

struct RTLIL::SigSpec
{
private:
	int width_;
	unsigned long hash_;
	std::vector<RTLIL::SigChunk> chunks_; // LSB at index 0
	std::vector<RTLIL::SigBit> bits_; // LSB at index 0

	void pack() const;
	void unpack() const;
	void updhash() const;

	inline bool packed() const {
		return bits_.empty();
	}

	inline void inline_unpack() const {
		if (!chunks_.empty())
			unpack();
	}

public:
	SigSpec();
	SigSpec(const RTLIL::SigSpec &other);
	SigSpec(std::initializer_list<RTLIL::SigSpec> parts);
	const RTLIL::SigSpec &operator=(const RTLIL::SigSpec &other);

	SigSpec(const RTLIL::Const &value);
	SigSpec(const RTLIL::SigChunk &chunk);
	SigSpec(RTLIL::Wire *wire);
	SigSpec(RTLIL::Wire *wire, int offset, int width = 1);
	SigSpec(const std::string &str);
	SigSpec(int val, int width = 32);
	SigSpec(RTLIL::State bit, int width = 1);
	SigSpec(RTLIL::SigBit bit, int width = 1);
	SigSpec(std::vector<RTLIL::SigChunk> chunks);
	SigSpec(std::vector<RTLIL::SigBit> bits);
	SigSpec(pool<RTLIL::SigBit> bits);
	SigSpec(std::set<RTLIL::SigBit> bits);
	SigSpec(bool bit);

	SigSpec(RTLIL::SigSpec &&other) {
		width_ = other.width_;
		hash_ = other.hash_;
		chunks_ = std::move(other.chunks_);
		bits_ = std::move(other.bits_);
	}

	const RTLIL::SigSpec &operator=(RTLIL::SigSpec &&other) {
		width_ = other.width_;
		hash_ = other.hash_;
		chunks_ = std::move(other.chunks_);
		bits_ = std::move(other.bits_);
		return *this;
	}

	size_t get_hash() const {
		if (!hash_) hash();
		return hash_;
	}

	inline const std::vector<RTLIL::SigChunk> &chunks() const { pack(); return chunks_; }
	inline const std::vector<RTLIL::SigBit> &bits() const { inline_unpack(); return bits_; }

	inline int size() const { return width_; }
	inline bool empty() const { return width_ == 0; }

	inline RTLIL::SigBit &operator[](int index) { inline_unpack(); return bits_.at(index); }
	inline const RTLIL::SigBit &operator[](int index) const { inline_unpack(); return bits_.at(index); }

	inline RTLIL::SigSpecIterator begin() { RTLIL::SigSpecIterator it; it.sig_p = this; it.index = 0; return it; }
	inline RTLIL::SigSpecIterator end() { RTLIL::SigSpecIterator it; it.sig_p = this; it.index = width_; return it; }

	inline RTLIL::SigSpecConstIterator begin() const { RTLIL::SigSpecConstIterator it; it.sig_p = this; it.index = 0; return it; }
	inline RTLIL::SigSpecConstIterator end() const { RTLIL::SigSpecConstIterator it; it.sig_p = this; it.index = width_; return it; }

	void sort();
	void sort_and_unify();

	void replace(const RTLIL::SigSpec &pattern, const RTLIL::SigSpec &with);
	void replace(const RTLIL::SigSpec &pattern, const RTLIL::SigSpec &with, RTLIL::SigSpec *other) const;

	void replace(const dict<RTLIL::SigBit, RTLIL::SigBit> &rules);
	void replace(const dict<RTLIL::SigBit, RTLIL::SigBit> &rules, RTLIL::SigSpec *other) const;

	void replace(const std::map<RTLIL::SigBit, RTLIL::SigBit> &rules);
	void replace(const std::map<RTLIL::SigBit, RTLIL::SigBit> &rules, RTLIL::SigSpec *other) const;

	void replace(int offset, const RTLIL::SigSpec &with);

	void remove(const RTLIL::SigSpec &pattern);
	void remove(const RTLIL::SigSpec &pattern, RTLIL::SigSpec *other) const;
	void remove2(const RTLIL::SigSpec &pattern, RTLIL::SigSpec *other);

	void remove(const pool<RTLIL::SigBit> &pattern);
	void remove(const pool<RTLIL::SigBit> &pattern, RTLIL::SigSpec *other) const;
	void remove2(const pool<RTLIL::SigBit> &pattern, RTLIL::SigSpec *other);
	void remove2(const std::set<RTLIL::SigBit> &pattern, RTLIL::SigSpec *other);

	void remove(int offset, int length = 1);
	void remove_const();

	RTLIL::SigSpec extract(const RTLIL::SigSpec &pattern, const RTLIL::SigSpec *other = NULL) const;
	RTLIL::SigSpec extract(const pool<RTLIL::SigBit> &pattern, const RTLIL::SigSpec *other = NULL) const;
	RTLIL::SigSpec extract(int offset, int length = 1) const;
	RTLIL::SigSpec extract_end(int offset) const { return extract(offset, width_ - offset); }

	void append(const RTLIL::SigSpec &signal);
	void append_bit(const RTLIL::SigBit &bit);

	void extend_u0(int width, bool is_signed = false);

	RTLIL::SigSpec repeat(int num) const;

	bool operator <(const RTLIL::SigSpec &other) const;
	bool operator ==(const RTLIL::SigSpec &other) const;
	inline bool operator !=(const RTLIL::SigSpec &other) const { return !(*this == other); }

	bool is_wire() const;
	bool is_chunk() const;
	inline bool is_bit() const { return width_ == 1; }

	bool is_fully_const() const;
	bool is_fully_zero() const;
	bool is_fully_ones() const;
	bool is_fully_def() const;
	bool is_fully_undef() const;
	bool has_const() const;
	bool has_marked_bits() const;

	bool as_bool() const;
	int as_int(bool is_signed = false) const;
	std::string as_string() const;
	RTLIL::Const as_const() const;
	RTLIL::Wire *as_wire() const;
	RTLIL::SigChunk as_chunk() const;
	RTLIL::SigBit as_bit() const;

	bool match(std::string pattern) const;

	std::set<RTLIL::SigBit> to_sigbit_set() const;
	pool<RTLIL::SigBit> to_sigbit_pool() const;
	std::vector<RTLIL::SigBit> to_sigbit_vector() const;
	std::map<RTLIL::SigBit, RTLIL::SigBit> to_sigbit_map(const RTLIL::SigSpec &other) const;
	dict<RTLIL::SigBit, RTLIL::SigBit> to_sigbit_dict(const RTLIL::SigSpec &other) const;

	static bool parse(RTLIL::SigSpec &sig, RTLIL::Module *module, std::string str);
	static bool parse_sel(RTLIL::SigSpec &sig, RTLIL::Design *design, RTLIL::Module *module, std::string str);
	static bool parse_rhs(const RTLIL::SigSpec &lhs, RTLIL::SigSpec &sig, RTLIL::Module *module, std::string str);

	operator std::vector<RTLIL::SigChunk>() const { return chunks(); }
	operator std::vector<RTLIL::SigBit>() const { return bits(); }