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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 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 1612 1613 1614
|
%option prefix="VL"
%option never-interactive
%option nounput
%{
/*
* Copyright (c) 1998-2015 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
* General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
# include "config.h"
//# define YYSTYPE lexval
# include <iostream>
# include "compiler.h"
# include "parse_misc.h"
# include "parse_api.h"
# include "parse.h"
# include <cctype>
# include <cstring>
# include "lexor_keyword.h"
# include "discipline.h"
# include <list>
# define YY_USER_INIT reset_lexor();
# define yylval VLlval
# define YY_NO_INPUT
/*
* Lexical location information is passed in the yylloc variable to th
* parser. The file names, strings, are kept in a list so that I can
* re-use them. The set_file_name function will return a pointer to
* the name as it exists in the list (and delete the passed string.)
* If the name is new, it will be added to the list.
*/
extern YYLTYPE yylloc;
char* strdupnew(char const *str)
{
return str ? strcpy(new char [strlen(str)+1], str) : 0;
}
static const char* set_file_name(char*text)
{
perm_string path = filename_strings.make(text);
delete[]text;
/* Check this file name with the list of library file
names. If there is a match, then turn on the
pform_library_flag. This is how the parser knows that
modules declared in this file are library modules. */
pform_library_flag = library_file_map[path];
return path;
}
void reset_lexor();
static void line_directive();
static void line_directive2();
verinum*make_unsized_binary(const char*txt);
verinum*make_undef_highz_dec(const char*txt);
verinum*make_unsized_dec(const char*txt);
verinum*make_unsized_octal(const char*txt);
verinum*make_unsized_hex(const char*txt);
static int dec_buf_div2(char *buf);
static void process_timescale(const char*txt);
static void process_ucdrive(const char*txt);
static list<int> keyword_mask_stack;
static int comment_enter;
static bool in_module = false;
static bool in_UDP = false;
bool in_celldefine = false;
UCDriveType uc_drive = UCD_NONE;
/*
* The parser sometimes needs to indicate to the lexor that the next
* identifier needs to be understood in the context of a package. The
* parser feeds back that left context with calls to the
* lex_in_package_scope.
*/
static PPackage* in_package_scope = 0;
void lex_in_package_scope(PPackage*pkg)
{
in_package_scope = pkg;
}
%}
%x CCOMMENT
%x PCOMMENT
%x LCOMMENT
%x CSTRING
%s UDPTABLE
%x PPTIMESCALE
%x PPUCDRIVE
%x PPDEFAULT_NETTYPE
%x PPBEGIN_KEYWORDS
%s EDGES
%x REAL_SCALE
W [ \t\b\f\r]+
S [afpnumkKMGT]
TU [munpf]
%%
/* Recognize the various line directives. */
^"#line"[ \t]+.+ { line_directive(); }
^[ \t]?"`line"[ \t]+.+ { line_directive2(); }
[ \t\b\f\r] { ; }
\n { yylloc.first_line += 1; }
/* C++ style comments start with / / and run to the end of the
current line. These are very easy to handle. The meta-comments
format is a little more tricky to handle, but do what we can. */
/* The lexor detects "// synthesis translate_on/off" meta-comments,
we handle them here by turning on/off a flag. The pform uses
that flag to attach implicit attributes to "initial" and
"always" statements. */
"//"{W}*"synthesis"{W}+"translate_on"{W}*\n { pform_mc_translate_on(true); }
"//"{W}*"synthesis"{W}+"translate_off"{W}*\n { pform_mc_translate_on(false); }
"//" { comment_enter = YY_START; BEGIN(LCOMMENT); }
<LCOMMENT>. { yymore(); }
<LCOMMENT>\n { yylloc.first_line += 1; BEGIN(comment_enter); }
/* The contents of C-style comments are ignored, like white space. */
"/*" { comment_enter = YY_START; BEGIN(CCOMMENT); }
<CCOMMENT>. { ; }
<CCOMMENT>\n { yylloc.first_line += 1; }
<CCOMMENT>"*/" { BEGIN(comment_enter); }
"(*" { return K_PSTAR; }
"*)" { return K_STARP; }
".*" { return K_DOTSTAR; }
"<<" { return K_LS; }
"<<<" { return K_LS; /* Note: Functionally, <<< is the same as <<. */}
">>" { return K_RS; }
">>>" { return K_RSS; }
"**" { return K_POW; }
"<=" { return K_LE; }
">=" { return K_GE; }
"=>" { return K_EG; }
"+=>"|"-=>" {
/*
* Resolve the ambiguity between the += assignment
* operator and +=> polarity edge path operator
*
* +=> should be treated as two separate tokens '+' and
* '=>' (K_EG), therefore we only consume the first
* character of the matched pattern i.e. either + or -
* and push back the rest of the matches text (=>) in
* the input stream.
*/
yyless(1);
return yytext[0];
}
"*>" { return K_SG; }
"==" { return K_EQ; }
"!=" { return K_NE; }
"===" { return K_CEQ; }
"!==" { return K_CNE; }
"||" { return K_LOR; }
"&&" { return K_LAND; }
"&&&" { return K_TAND; }
"~|" { return K_NOR; }
"~^" { return K_NXOR; }
"^~" { return K_NXOR; }
"~&" { return K_NAND; }
"->" { return K_TRIGGER; }
"+:" { return K_PO_POS; }
"-:" { return K_PO_NEG; }
"<+" { return K_CONTRIBUTE; }
"+=" { return K_PLUS_EQ; }
"-=" { return K_MINUS_EQ; }
"*=" { return K_MUL_EQ; }
"/=" { return K_DIV_EQ; }
"%=" { return K_MOD_EQ; }
"&=" { return K_AND_EQ; }
"|=" { return K_OR_EQ; }
"^=" { return K_XOR_EQ; }
"<<=" { return K_LS_EQ; }
">>=" { return K_RS_EQ; }
"<<<=" { return K_LS_EQ; }
">>>=" { return K_RSS_EQ; }
"++" { return K_INCR; }
"--" {return K_DECR; }
"'{" { return K_LP; }
"::" { return K_SCOPE_RES; }
/* Watch out for the tricky case of (*). Cannot parse this as "(*"
and ")", but since I know that this is really ( * ), replace it
with "*" and return that. */
"("{W}*"*"{W}*")" { return '*'; }
<EDGES>"]" { BEGIN(0); return yytext[0]; }
[}{;:\[\],()#=.@&!?<>%|^~+*/-] { return yytext[0]; }
\" { BEGIN(CSTRING); }
<CSTRING>\\\\ { yymore(); /* Catch \\, which is a \ escaping itself */ }
<CSTRING>\\\" { yymore(); /* Catch \", which is an escaped quote */ }
<CSTRING>\n { BEGIN(0);
yylval.text = strdupnew(yytext);
VLerror(yylloc, "Missing close quote of string.");
yylloc.first_line += 1;
return STRING; }
<CSTRING>\" { BEGIN(0);
yylval.text = strdupnew(yytext);
yylval.text[strlen(yytext)-1] = 0;
return STRING; }
<CSTRING>. { yymore(); }
/* The UDP Table is a unique lexical environment. These are most
tokens that we can expect in a table. */
<UDPTABLE>\(\?0\) { return '_'; }
<UDPTABLE>\(\?1\) { return '+'; }
<UDPTABLE>\(\?[xX]\) { return '%'; }
<UDPTABLE>\(\?\?\) { return '*'; }
<UDPTABLE>\(01\) { return 'r'; }
<UDPTABLE>\(0[xX]\) { return 'Q'; }
<UDPTABLE>\(b[xX]\) { return 'q'; }
<UDPTABLE>\(b0\) { return 'f'; /* b0 is 10|00, but only 10 is meaningful */}
<UDPTABLE>\(b1\) { return 'r'; /* b1 is 11|01, but only 01 is meaningful */}
<UDPTABLE>\(0\?\) { return 'P'; }
<UDPTABLE>\(10\) { return 'f'; }
<UDPTABLE>\(1[xX]\) { return 'M'; }
<UDPTABLE>\(1\?\) { return 'N'; }
<UDPTABLE>\([xX]0\) { return 'F'; }
<UDPTABLE>\([xX]1\) { return 'R'; }
<UDPTABLE>\([xX]\?\) { return 'B'; }
<UDPTABLE>[bB] { return 'b'; }
<UDPTABLE>[lL] { return 'l'; /* IVL extension */ }
<UDPTABLE>[hH] { return 'h'; /* IVL extension */ }
<UDPTABLE>[fF] { return 'f'; }
<UDPTABLE>[rR] { return 'r'; }
<UDPTABLE>[xX] { return 'x'; }
<UDPTABLE>[nN] { return 'n'; }
<UDPTABLE>[pP] { return 'p'; }
<UDPTABLE>[01\?\*\-:;] { return yytext[0]; }
<EDGES>"01" { return K_edge_descriptor; }
<EDGES>"0x" { return K_edge_descriptor; }
<EDGES>"0z" { return K_edge_descriptor; }
<EDGES>"10" { return K_edge_descriptor; }
<EDGES>"1x" { return K_edge_descriptor; }
<EDGES>"1z" { return K_edge_descriptor; }
<EDGES>"x0" { return K_edge_descriptor; }
<EDGES>"x1" { return K_edge_descriptor; }
<EDGES>"z0" { return K_edge_descriptor; }
<EDGES>"z1" { return K_edge_descriptor; }
[a-zA-Z_][a-zA-Z0-9$_]* {
int rc = lexor_keyword_code(yytext, yyleng);
switch (rc) {
case IDENTIFIER:
yylval.text = strdupnew(yytext);
if (strncmp(yylval.text,"PATHPULSE$", 10) == 0)
rc = PATHPULSE_IDENTIFIER;
break;
case K_edge:
BEGIN(EDGES);
break;
case K_module:
case K_macromodule:
in_module = true;
break;
case K_endmodule:
in_module = false;
break;
case K_primitive:
in_UDP = true;
break;
case K_endprimitive:
in_UDP = false;
break;
case K_table:
BEGIN(UDPTABLE);
break;
/* Translate these to checks if we already have or are
* outside the declaration region. */
case K_timeunit:
if (have_timeunit_decl) rc = K_timeunit_check;
break;
case K_timeprecision:
if (have_timeprec_decl) rc = K_timeprecision_check;
break;
default:
yylval.text = 0;
break;
}
/* Special case: If this is part of a scoped name, then check
the package for identifier details. For example, if the
source file is foo::bar, the parse.y will note the
PACKAGE_IDENTIFIER and "::" token and mark the
"in_package_scope" variable. Then this lexor will see the
identifier here and interpret it in the package scope. */
if (in_package_scope) {
if (rc == IDENTIFIER) {
if (data_type_t*type = pform_test_type_identifier(in_package_scope, yylval.text)) {
yylval.type_identifier.text = yylval.text;
yylval.type_identifier.type = type;
rc = TYPE_IDENTIFIER;
}
}
in_package_scope = 0;
return rc;
}
/* If this identifier names a discipline, then return this as
a DISCIPLINE_IDENTIFIER and return the discipline as the
value instead. */
if (rc == IDENTIFIER && gn_verilog_ams_flag) {
perm_string tmp = lex_strings.make(yylval.text);
map<perm_string,ivl_discipline_t>::iterator cur = disciplines.find(tmp);
if (cur != disciplines.end()) {
delete[]yylval.text;
yylval.discipline = (*cur).second;
rc = DISCIPLINE_IDENTIFIER;
}
}
/* If this identifier names a previously declared package, then
return this as a PACKAGE_IDENTIFIER instead. */
if (rc == IDENTIFIER && gn_system_verilog()) {
if (PPackage*pkg = pform_test_package_identifier(yylval.text)) {
delete[]yylval.text;
yylval.package = pkg;
rc = PACKAGE_IDENTIFIER;
}
}
/* If this identifier names a previously declared type, then
return this as a TYPE_IDENTIFIER instead. */
if (rc == IDENTIFIER && gn_system_verilog()) {
if (data_type_t*type = pform_test_type_identifier(yylval.text)) {
yylval.type_identifier.text = yylval.text;
yylval.type_identifier.type = type;
rc = TYPE_IDENTIFIER;
}
}
return rc;
}
\\[^ \t\b\f\r\n]+ {
yylval.text = strdupnew(yytext+1);
if (gn_system_verilog()) {
if (PPackage*pkg = pform_test_package_identifier(yylval.text)) {
delete[]yylval.text;
yylval.package = pkg;
return PACKAGE_IDENTIFIER;
}
}
if (gn_system_verilog()) {
if (data_type_t*type = pform_test_type_identifier(yylval.text)) {
yylval.type_identifier.text = yylval.text;
yylval.type_identifier.type = type;
return TYPE_IDENTIFIER;
}
}
return IDENTIFIER;
}
\$([a-zA-Z0-9$_]+) {
/* The 1364-1995 timing checks. */
if (strcmp(yytext,"$hold") == 0)
return K_Shold;
if (strcmp(yytext,"$nochange") == 0)
return K_Snochange;
if (strcmp(yytext,"$period") == 0)
return K_Speriod;
if (strcmp(yytext,"$recovery") == 0)
return K_Srecovery;
if (strcmp(yytext,"$setup") == 0)
return K_Ssetup;
if (strcmp(yytext,"$setuphold") == 0)
return K_Ssetuphold;
if (strcmp(yytext,"$skew") == 0)
return K_Sskew;
if (strcmp(yytext,"$width") == 0)
return K_Swidth;
/* The new 1364-2001 timing checks. */
if (strcmp(yytext,"$fullskew") == 0)
return K_Sfullskew;
if (strcmp(yytext,"$recrem") == 0)
return K_Srecrem;
if (strcmp(yytext,"$removal") == 0)
return K_Sremoval;
if (strcmp(yytext,"$timeskew") == 0)
return K_Stimeskew;
if (strcmp(yytext,"$attribute") == 0)
return KK_attribute;
yylval.text = strdupnew(yytext);
return SYSTEM_IDENTIFIER; }
\'[sS]?[dD][ \t]*[0-9][0-9_]* {
yylval.number = make_unsized_dec(yytext);
return BASED_NUMBER;
}
\'[sS]?[dD][ \t]*[xzXZ?]_* {
yylval.number = make_undef_highz_dec(yytext);
return BASED_NUMBER;
}
\'[sS]?[bB][ \t]*[0-1xzXZ?][0-1xzXZ?_]* {
yylval.number = make_unsized_binary(yytext);
return BASED_NUMBER;
}
\'[sS]?[oO][ \t]*[0-7xzXZ?][0-7xzXZ?_]* {
yylval.number = make_unsized_octal(yytext);
return BASED_NUMBER;
}
\'[sS]?[hH][ \t]*[0-9a-fA-FxzXZ?][0-9a-fA-FxzXZ?_]* {
yylval.number = make_unsized_hex(yytext);
return BASED_NUMBER;
}
\'[01xzXZ] {
if (!gn_system_verilog()) {
cerr << yylloc.text << ":" << yylloc.first_line << ": warning: "
<< "Using SystemVerilog 'N bit vector. Use at least "
<< "-g2005-sv to remove this warning." << endl;
}
generation_t generation_save = generation_flag;
generation_flag = GN_VER2005_SV;
yylval.number = make_unsized_binary(yytext);
generation_flag = generation_save;
return UNBASED_NUMBER; }
/* Decimal numbers are the usual. But watch out for the UDPTABLE
mode, where there are no decimal numbers. Reject the match if we
are in the UDPTABLE state. */
[0-9][0-9_]* {
if (YY_START==UDPTABLE) {
REJECT;
} else {
yylval.number = make_unsized_dec(yytext);
based_size = yylval.number->as_ulong();
return DEC_NUMBER;
}
}
/* This rule handles scaled time values for SystemVerilog. */
[0-9][0-9_]*(\.[0-9][0-9_]*)?{TU}?s {
if (gn_system_verilog()) {
yylval.text = strdupnew(yytext);
return TIME_LITERAL;
} else REJECT; }
/* These rules handle the scaled real literals from Verilog-AMS. The
value is a number with a single letter scale factor. If
verilog-ams is not enabled, then reject this rule. If it is
enabled, then collect the scale and use it to scale the value. */
[0-9][0-9_]*\.[0-9][0-9_]*/{S} {
if (!gn_verilog_ams_flag) REJECT;
BEGIN(REAL_SCALE);
yymore(); }
[0-9][0-9_]*/{S} {
if (!gn_verilog_ams_flag) REJECT;
BEGIN(REAL_SCALE);
yymore(); }
<REAL_SCALE>{S} {
size_t token_len = strlen(yytext);
char*tmp = new char[token_len + 5];
int scale = 0;
strcpy(tmp, yytext);
switch (tmp[token_len-1]) {
case 'a': scale = -18; break; /* atto- */
case 'f': scale = -15; break; /* femto- */
case 'p': scale = -12; break; /* pico- */
case 'n': scale = -9; break; /* nano- */
case 'u': scale = -6; break; /* micro- */
case 'm': scale = -3; break; /* milli- */
case 'k': scale = 3; break; /* kilo- */
case 'K': scale = 3; break; /* kilo- */
case 'M': scale = 6; break; /* mega- */
case 'G': scale = 9; break; /* giga- */
case 'T': scale = 12; break; /* tera- */
default: assert(0); break;
}
snprintf(tmp+token_len-1, 5, "e%d", scale);
yylval.realtime = new verireal(tmp);
delete[]tmp;
BEGIN(0);
return REALTIME; }
[0-9][0-9_]*\.[0-9][0-9_]*([Ee][+-]?[0-9][0-9_]*)? {
yylval.realtime = new verireal(yytext);
return REALTIME; }
[0-9][0-9_]*[Ee][+-]?[0-9][0-9_]* {
yylval.realtime = new verireal(yytext);
return REALTIME; }
/* Notice and handle the `timescale directive. */
^{W}?`timescale { BEGIN(PPTIMESCALE); }
<PPTIMESCALE>.* { process_timescale(yytext); }
<PPTIMESCALE>\n {
if (in_module) {
cerr << yylloc.text << ":" << yylloc.first_line << ": error: "
"`timescale directive can not be inside a module "
"definition." << endl;
error_count += 1;
}
yylloc.first_line += 1;
BEGIN(0); }
/* Notice and handle the `celldefine and `endcelldefine directives. */
^{W}?`celldefine{W}? { in_celldefine = true; }
^{W}?`endcelldefine{W}? { in_celldefine = false; }
/* Notice and handle the resetall directive. */
^{W}?`resetall{W}? {
if (in_module) {
cerr << yylloc.text << ":" << yylloc.first_line << ": error: "
"`resetall directive can not be inside a module "
"definition." << endl;
error_count += 1;
} else if (in_UDP) {
cerr << yylloc.text << ":" << yylloc.first_line << ": error: "
"`resetall directive can not be inside a UDP "
"definition." << endl;
error_count += 1;
} else {
pform_set_default_nettype(NetNet::WIRE, yylloc.text,
yylloc.first_line);
in_celldefine = false;
uc_drive = UCD_NONE;
pform_set_timescale(def_ts_units, def_ts_prec, 0, 0);
} }
/* Notice and handle the `unconnected_drive directive. */
^{W}?`unconnected_drive { BEGIN(PPUCDRIVE); }
<PPUCDRIVE>.* { process_ucdrive(yytext); }
<PPUCDRIVE>\n {
if (in_module) {
cerr << yylloc.text << ":" << yylloc.first_line << ": error: "
"`unconnected_drive directive can not be inside a "
"module definition." << endl;
error_count += 1;
}
yylloc.first_line += 1;
BEGIN(0); }
^{W}?`nounconnected_drive{W}? {
if (in_module) {
cerr << yylloc.text << ":" << yylloc.first_line << ": error: "
"`nounconnected_drive directive can not be inside a "
"module definition." << endl;
error_count += 1;
}
uc_drive = UCD_NONE; }
/* These are directives that I do not yet support. I think that IVL
should handle these, not an external preprocessor. */
/* From 1364-2005 Chapter 19. */
^{W}?`pragme{W}?.* { }
/* From 1364-2005 Annex D. */
^{W}?`default_decay_time{W}?.* { }
^{W}?`default_trireg_strength{W}?.* { }
^{W}?`delay_mode_distributed{W}?.* { }
^{W}?`delay_mode_path{W}?.* { }
^{W}?`delay_mode_unit{W}?.* { }
^{W}?`delay_mode_zero{W}?.* { }
/* From other places. */
^{W}?`disable_portfaults{W}?.* { }
^{W}?`enable_portfaults{W}?.* { }
`endprotect { }
^{W}?`nosuppress_faults{W}?.* { }
`protect { }
^{W}?`suppress_faults{W}?.* { }
^{W}?`uselib{W}?.* { }
^{W}?`begin_keywords{W}? { BEGIN(PPBEGIN_KEYWORDS); }
<PPBEGIN_KEYWORDS>\"[a-zA-Z0-9 -\.]*\".* {
keyword_mask_stack.push_front(lexor_keyword_mask);
char*word = yytext+1;
char*tail = strchr(word, '"');
tail[0] = 0;
if (strcmp(word,"1364-1995") == 0) {
lexor_keyword_mask = GN_KEYWORDS_1364_1995;
} else if (strcmp(word,"1364-2001") == 0) {
lexor_keyword_mask = GN_KEYWORDS_1364_1995
|GN_KEYWORDS_1364_2001
|GN_KEYWORDS_1364_2001_CONFIG;
} else if (strcmp(word,"1364-2001-noconfig") == 0) {
lexor_keyword_mask = GN_KEYWORDS_1364_1995
|GN_KEYWORDS_1364_2001;
} else if (strcmp(word,"1364-2005") == 0) {
lexor_keyword_mask = GN_KEYWORDS_1364_1995
|GN_KEYWORDS_1364_2001
|GN_KEYWORDS_1364_2001_CONFIG
|GN_KEYWORDS_1364_2005;
} else if (strcmp(word,"1800-2005") == 0) {
lexor_keyword_mask = GN_KEYWORDS_1364_1995
|GN_KEYWORDS_1364_2001
|GN_KEYWORDS_1364_2001_CONFIG
|GN_KEYWORDS_1364_2005
|GN_KEYWORDS_1800_2005;
} else if (strcmp(word,"1800-2009") == 0) {
lexor_keyword_mask = GN_KEYWORDS_1364_1995
|GN_KEYWORDS_1364_2001
|GN_KEYWORDS_1364_2001_CONFIG
|GN_KEYWORDS_1364_2005
|GN_KEYWORDS_1800_2005
|GN_KEYWORDS_1800_2009;
} else if (strcmp(word,"1800-2012") == 0) {
lexor_keyword_mask = GN_KEYWORDS_1364_1995
|GN_KEYWORDS_1364_2001
|GN_KEYWORDS_1364_2001_CONFIG
|GN_KEYWORDS_1364_2005
|GN_KEYWORDS_1800_2005
|GN_KEYWORDS_1800_2009
|GN_KEYWORDS_1800_2012;
} else if (strcmp(word,"VAMS-2.3") == 0) {
lexor_keyword_mask = GN_KEYWORDS_1364_1995
|GN_KEYWORDS_1364_2001
|GN_KEYWORDS_1364_2001_CONFIG
|GN_KEYWORDS_1364_2005
|GN_KEYWORDS_VAMS_2_3;
} else {
fprintf(stderr, "%s:%d: Ignoring unknown keywords string: %s\n",
yylloc.text, yylloc.first_line, word);
}
BEGIN(0);
}
<PPBEGIN_KEYWORDS>.* {
fprintf(stderr, "%s:%d: Malformed keywords specification: %s\n",
yylloc.text, yylloc.first_line, yytext);
BEGIN(0);
}
^{W}?`end_keywords{W}?.* {
if (!keyword_mask_stack.empty()) {
lexor_keyword_mask = keyword_mask_stack.front();
keyword_mask_stack.pop_front();
} else {
fprintf(stderr, "%s:%d: Mismatched end_keywords directive\n",
yylloc.text, yylloc.first_line);
}
}
/* Notice and handle the default_nettype directive. The lexor
detects the default_nettype keyword, and the second part of the
rule collects the rest of the line and processes it. We only need
to look for the first work, and interpret it. */
`default_nettype{W}? { BEGIN(PPDEFAULT_NETTYPE); }
<PPDEFAULT_NETTYPE>.* {
NetNet::Type net_type;
size_t wordlen = strcspn(yytext, " \t\f\r\n");
yytext[wordlen] = 0;
/* Add support for other wire types and better error detection. */
if (strcmp(yytext,"wire") == 0) {
net_type = NetNet::WIRE;
} else if (strcmp(yytext,"tri") == 0) {
net_type = NetNet::TRI;
} else if (strcmp(yytext,"tri0") == 0) {
net_type = NetNet::TRI0;
} else if (strcmp(yytext,"tri1") == 0) {
net_type = NetNet::TRI1;
} else if (strcmp(yytext,"wand") == 0) {
net_type = NetNet::WAND;
} else if (strcmp(yytext,"triand") == 0) {
net_type = NetNet::TRIAND;
} else if (strcmp(yytext,"wor") == 0) {
net_type = NetNet::WOR;
} else if (strcmp(yytext,"trior") == 0) {
net_type = NetNet::TRIOR;
} else if (strcmp(yytext,"none") == 0) {
net_type = NetNet::NONE;
} else {
cerr << yylloc.text << ":" << yylloc.first_line
<< ": error: Net type " << yytext
<< " is not a valid (or supported)"
<< " default net type." << endl;
net_type = NetNet::WIRE;
error_count += 1;
}
pform_set_default_nettype(net_type, yylloc.text, yylloc.first_line);
}
<PPDEFAULT_NETTYPE>\n {
yylloc.first_line += 1;
BEGIN(0); }
/* These are directives that are not supported by me and should have
been handled by an external preprocessor such as ivlpp. */
^{W}?`define{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: `define not supported. Use an external preprocessor."
<< endl;
}
^{W}?`else{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: `else not supported. Use an external preprocessor."
<< endl;
}
^{W}?`elsif{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: `elsif not supported. Use an external preprocessor."
<< endl;
}
^{W}?`endif{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: `endif not supported. Use an external preprocessor."
<< endl;
}
^{W}?`ifdef{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: `ifdef not supported. Use an external preprocessor."
<< endl;
}
^{W}?`ifndef{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: `ifndef not supported. Use an external preprocessor."
<< endl;
}
^`include{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: `include not supported. Use an external preprocessor."
<< endl;
}
^`undef{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: `undef not supported. Use an external preprocessor."
<< endl;
}
`{W} { cerr << yylloc.text << ":" << yylloc.first_line << ": error: "
<< "Stray tic (`) here. Perhaps you put white space" << endl;
cerr << yylloc.text << ":" << yylloc.first_line << ": : "
<< "between the tic and preprocessor directive?"
<< endl;
error_count += 1; }
. { return yytext[0]; }
/* Final catchall. something got lost or mishandled. */
/* XXX Should we tell the user something about the lexical state? */
<*>.|\n { cerr << yylloc.text << ":" << yylloc.first_line
<< ": error: unmatched character (";
if (isprint(yytext[0]))
cerr << yytext[0];
else
cerr << "hex " << hex << ((unsigned char) yytext[0]);
cerr << ")" << endl;
error_count += 1; }
%%
/*
* The UDP state table needs some slightly different treatment by the
* lexor. The level characters are normally accepted as other things,
* so the parser needs to switch my mode when it believes in needs to.
*/
void lex_end_table()
{
BEGIN(INITIAL);
}
static unsigned truncate_to_integer_width(verinum::V*bits, unsigned size)
{
if (size <= integer_width) return size;
verinum::V pad = bits[size-1];
if (pad == verinum::V1) pad = verinum::V0;
for (unsigned idx = integer_width; idx < size; idx += 1) {
if (bits[idx] != pad) {
yywarn(yylloc, "Unsized numeric constant truncated to integer width.");
break;
}
}
return integer_width;
}
verinum*make_unsized_binary(const char*txt)
{
bool sign_flag = false;
bool single_flag = false;
const char*ptr = txt;
assert(*ptr == '\'');
ptr += 1;
if (tolower(*ptr) == 's') {
sign_flag = true;
ptr += 1;
}
assert((tolower(*ptr) == 'b') || gn_system_verilog());
if (tolower(*ptr) == 'b') {
ptr += 1;
} else {
assert(sign_flag == false);
single_flag = true;
}
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
unsigned size = 0;
for (const char*idx = ptr ; *idx ; idx += 1)
if (*idx != '_') size += 1;
if ((based_size > 0) && (size > based_size)) yywarn(yylloc,
"extra digits given for sized binary constant.");
verinum::V*bits = new verinum::V[size];
unsigned idx = size;
while (*ptr) {
switch (ptr[0]) {
case '0':
bits[--idx] = verinum::V0;
break;
case '1':
bits[--idx] = verinum::V1;
break;
case 'z': case 'Z': case '?':
bits[--idx] = verinum::Vz;
break;
case 'x': case 'X':
bits[--idx] = verinum::Vx;
break;
case '_':
break;
default:
fprintf(stderr, "%c\n", ptr[0]);
assert(0);
}
ptr += 1;
}
if (gn_strict_expr_width_flag && (based_size == 0))
size = truncate_to_integer_width(bits, size);
verinum*out = new verinum(bits, size, false);
out->has_sign(sign_flag);
out->is_single(single_flag);
delete[]bits;
return out;
}
verinum*make_unsized_octal(const char*txt)
{
bool sign_flag = false;
const char*ptr = txt;
assert(*ptr == '\'');
ptr += 1;
if (tolower(*ptr) == 's') {
sign_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'o');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
unsigned size = 0;
for (const char*idx = ptr ; *idx ; idx += 1)
if (*idx != '_') size += 3;
if (based_size > 0) {
int rem = based_size % 3;
if (rem != 0) based_size += 3 - rem;
if (size > based_size) yywarn(yylloc,
"extra digits given for sized octal constant.");
}
verinum::V*bits = new verinum::V[size];
unsigned idx = size;
while (*ptr) {
unsigned val;
switch (ptr[0]) {
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
val = *ptr - '0';
bits[--idx] = (val&4) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&2) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&1) ? verinum::V1 : verinum::V0;
break;
case 'x': case 'X':
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
break;
case 'z': case 'Z': case '?':
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
break;
case '_':
break;
default:
assert(0);
}
ptr += 1;
}
if (gn_strict_expr_width_flag && (based_size == 0))
size = truncate_to_integer_width(bits, size);
verinum*out = new verinum(bits, size, false);
out->has_sign(sign_flag);
delete[]bits;
return out;
}
verinum*make_unsized_hex(const char*txt)
{
bool sign_flag = false;
const char*ptr = txt;
assert(*ptr == '\'');
ptr += 1;
if (tolower(*ptr) == 's') {
sign_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'h');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
unsigned size = 0;
for (const char*idx = ptr ; *idx ; idx += 1)
if (*idx != '_') size += 4;
if (based_size > 0) {
int rem = based_size % 4;
if (rem != 0) based_size += 4 - rem;
if (size > based_size) yywarn(yylloc,
"extra digits given for sized hex constant.");
}
verinum::V*bits = new verinum::V[size];
unsigned idx = size;
while (*ptr) {
unsigned val;
switch (ptr[0]) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
val = *ptr - '0';
bits[--idx] = (val&8) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&4) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&2) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&1) ? verinum::V1 : verinum::V0;
break;
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
val = tolower(*ptr) - 'a' + 10;
bits[--idx] = (val&8) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&4) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&2) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&1) ? verinum::V1 : verinum::V0;
break;
case 'x': case 'X':
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
break;
case 'z': case 'Z': case '?':
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
break;
case '_':
break;
default:
assert(0);
}
ptr += 1;
}
if (gn_strict_expr_width_flag && (based_size == 0))
size = truncate_to_integer_width(bits, size);
verinum*out = new verinum(bits, size, false);
out->has_sign(sign_flag);
delete[]bits;
return out;
}
/* Divide the integer given by the string by 2. Return the remainder bit. */
static int dec_buf_div2(char *buf)
{
int partial;
int len = strlen(buf);
char *dst_ptr;
int pos;
partial = 0;
pos = 0;
/* dst_ptr overwrites buf, but all characters that are overwritten
were already used by the reader. */
dst_ptr = buf;
while(buf[pos] == '0')
++pos;
for(; pos<len; ++pos){
if (buf[pos]=='_')
continue;
assert(isdigit(buf[pos]));
partial= partial*10 + (buf[pos]-'0');
if (partial >= 2){
*dst_ptr = partial/2 + '0';
partial = partial & 1;
++dst_ptr;
}
else{
*dst_ptr = '0';
++dst_ptr;
}
}
// If result of division was zero string, it should remain that way.
// Don't eat the last zero...
if (dst_ptr == buf){
*dst_ptr = '0';
++dst_ptr;
}
*dst_ptr = 0;
return partial;
}
/* Support a single x, z or ? as a decimal constant (from 1364-2005). */
verinum* make_undef_highz_dec(const char* ptr)
{
bool signed_flag = false;
assert(*ptr == '\'');
/* The number may have decorations of the form 'sd<code>,
possibly with space between the d and the <code>.
Also, the 's' is optional, and marks the number as signed. */
ptr += 1;
if (tolower(*ptr) == 's') {
signed_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'd');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
/* Process the code. */
verinum::V* bits = new verinum::V[1];
switch (*ptr) {
case 'x':
case 'X':
bits[0] = verinum::Vx;
break;
case 'z':
case 'Z':
case '?':
bits[0] = verinum::Vz;
break;
default:
assert(0);
}
ptr += 1;
while (*ptr == '_') ptr += 1;
assert(*ptr == 0);
verinum*out = new verinum(bits, 1, false);
out->has_sign(signed_flag);
delete[]bits;
return out;
}
/*
* Making a decimal number is much easier than the other base numbers
* because there are no z or x values to worry about. It is much
* harder than other base numbers because the width needed in bits is
* hard to calculate.
*/
verinum*make_unsized_dec(const char*ptr)
{
char buf[4096];
bool signed_flag = false;
unsigned idx;
if (ptr[0] == '\'') {
/* The number has decorations of the form 'sd<digits>,
possibly with space between the d and the <digits>.
Also, the 's' is optional, and marks the number as
signed. */
ptr += 1;
if (tolower(*ptr) == 's') {
signed_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'd');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
} else {
/* ... or an undecorated decimal number is passed
it. These numbers are treated as signed decimal. */
assert(isdigit(*ptr));
signed_flag = true;
}
/* Copy the digits into a buffer that I can use to do in-place
decimal divides. */
idx = 0;
while ((idx < sizeof buf) && (*ptr != 0)) {
if (*ptr == '_') {
ptr += 1;
continue;
}
buf[idx++] = *ptr++;
}
if (idx == sizeof buf) {
fprintf(stderr, "Ridiculously long"
" decimal constant will be truncated!\n");
idx -= 1;
}
buf[idx] = 0;
unsigned tmp_size = idx * 4 + 1;
verinum::V *bits = new verinum::V[tmp_size];
idx = 0;
while (idx < tmp_size) {
int rem = dec_buf_div2(buf);
bits[idx++] = (rem == 1) ? verinum::V1 : verinum::V0;
}
assert(strcmp(buf, "0") == 0);
/* Now calculate the minimum number of bits needed to
represent this unsigned number. */
unsigned size = tmp_size;
while ((size > 1) && (bits[size-1] == verinum::V0))
size -= 1;
/* Now account for the signedness. Don't leave a 1 in the high
bit if this is a signed number. */
if (signed_flag && (bits[size-1] == verinum::V1)) {
size += 1;
assert(size <= tmp_size);
}
/* Since we never have the real number of bits that a decimal
number represents we do not check for extra bits. */
// if (based_size > 0) { }
if (gn_strict_expr_width_flag && (based_size == 0))
size = truncate_to_integer_width(bits, size);
verinum*res = new verinum(bits, size, false);
res->has_sign(signed_flag);
delete[]bits;
return res;
}
/*
* Convert the string to a time unit or precision.
* Returns true on failure.
*/
static bool get_timescale_const(const char *&cp, int &res, bool is_unit)
{
/* Check for the 1 digit. */
if (*cp != '1') {
if (is_unit) {
VLerror(yylloc, "Invalid `timescale unit constant "
"(1st digit)");
} else {
VLerror(yylloc, "Invalid `timescale precision constant "
"(1st digit)");
}
return true;
}
cp += 1;
/* Check the number of zeros after the 1. */
res = strspn(cp, "0");
if (res > 2) {
if (is_unit) {
VLerror(yylloc, "Invalid `timescale unit constant "
"(number of zeros)");
} else {
VLerror(yylloc, "Invalid `timescale precision constant "
"(number of zeros)");
}
return true;
}
cp += res;
/* Skip any space between the digits and the scaling string. */
cp += strspn(cp, " \t");
/* Now process the scaling string. */
if (strncmp("s", cp, 1) == 0) {
res -= 0;
cp += 1;
return false;
} else if (strncmp("ms", cp, 2) == 0) {
res -= 3;
cp += 2;
return false;
} else if (strncmp("us", cp, 2) == 0) {
res -= 6;
cp += 2;
return false;
} else if (strncmp("ns", cp, 2) == 0) {
res -= 9;
cp += 2;
return false;
} else if (strncmp("ps", cp, 2) == 0) {
res -= 12;
cp += 2;
return false;
} else if (strncmp("fs", cp, 2) == 0) {
res -= 15;
cp += 2;
return false;
}
if (is_unit) {
VLerror(yylloc, "Invalid `timescale unit scale");
} else {
VLerror(yylloc, "Invalid `timescale precision scale");
}
return true;
}
/*
* process either a pull0 or a pull1.
*/
static void process_ucdrive(const char*txt)
{
UCDriveType ucd = UCD_NONE;
const char*cp = txt + strspn(txt, " \t");
/* Skip the space after the `unconnected_drive directive. */
if (cp == txt) {
VLerror(yylloc, "Space required after `unconnected_drive "
"directive.");
return;
}
/* Check for the pull keyword. */
if (strncmp("pull", cp, 4) != 0) {
VLerror(yylloc, "pull required for `unconnected_drive "
"directive.");
return;
}
cp += 4;
if (*cp == '0') ucd = UCD_PULL0;
else if (*cp == '1') ucd = UCD_PULL1;
else {
cerr << yylloc.text << ":" << yylloc.first_line << ": error: "
"`unconnected_drive does not support 'pull" << *cp
<< "'." << endl;
error_count += 1;
return;
}
cp += 1;
/* Verify that only space and/or a single line comment is left. */
cp += strspn(cp, " \t");
if (strncmp(cp, "//", 2) != 0 &&
(size_t)(cp-yytext) != strlen(yytext)) {
VLerror(yylloc, "Invalid `unconnected_drive directive (extra "
"garbage after precision).");
return;
}
uc_drive = ucd;
}
/*
* The timescale parameter has the form:
* " <num> xs / <num> xs"
*/
static void process_timescale(const char*txt)
{
const char*cp = txt + strspn(txt, " \t");
/* Skip the space after the `timescale directive. */
if (cp == txt) {
VLerror(yylloc, "Space required after `timescale directive.");
return;
}
int unit = 0;
int prec = 0;
/* Get the time units. */
if (get_timescale_const(cp, unit, true)) return;
/* Skip any space after the time units, the '/' and any
* space after the '/'. */
cp += strspn(cp, " \t");
if (*cp != '/') {
VLerror(yylloc, "`timescale separator '/' appears to be missing.");
return;
}
cp += 1;
cp += strspn(cp, " \t");
/* Get the time precision. */
if (get_timescale_const(cp, prec, false)) return;
/* Verify that only space and/or a single line comment is left. */
cp += strspn(cp, " \t");
if (strncmp(cp, "//", 2) != 0 &&
(size_t)(cp-yytext) != strlen(yytext)) {
VLerror(yylloc, "Invalid `timescale directive (extra garbage "
"after precision).");
return;
}
/* The time unit must be greater than or equal to the precision. */
if (unit < prec) {
VLerror(yylloc, "error: `timescale unit must not be less than "
"the precision.");
return;
}
pform_set_timescale(unit, prec, yylloc.text, yylloc.first_line);
}
int yywrap()
{
return 1;
}
/*
* The line directive matches lines of the form #line "foo" N and
* calls this function. Here I parse out the file name and line
* number, and change the yylloc to suite.
*/
static void line_directive()
{
char *cpr;
/* Skip any leading space. */
char *cp = strchr(yytext, '#');
/* Skip the #line directive. */
assert(strncmp(cp, "#line", 5) == 0);
cp += 5;
/* Skip the space after the #line directive. */
cp += strspn(cp, " \t");
/* Find the starting " and skip it. */
char*fn_start = strchr(cp, '"');
if (cp != fn_start) {
VLerror(yylloc, "Invalid #line directive (file name start).");
return;
}
fn_start += 1;
/* Find the last ". */
char*fn_end = strrchr(fn_start, '"');
if (!fn_end) {
VLerror(yylloc, "Invalid #line directive (file name end).");
return;
}
/* Copy the file name and assign it to yylloc. */
char*buf = new char[fn_end-fn_start+1];
strncpy(buf, fn_start, fn_end-fn_start);
buf[fn_end-fn_start] = 0;
/* Skip the space after the file name. */
cp = fn_end;
cp += 1;
cpr = cp;
cpr += strspn(cp, " \t");
if (cp == cpr) {
VLerror(yylloc, "Invalid #line directive (missing space after "
"file name).");
delete[] buf;
return;
}
cp = cpr;
/* Get the line number and verify that it is correct. */
unsigned long lineno = strtoul(cp, &cpr, 10);
if (cp == cpr) {
VLerror(yylloc, "Invalid line number for #line directive.");
delete[] buf;
return;
}
cp = cpr;
/* Verify that only space is left. */
cpr += strspn(cp, " \t");
if ((size_t)(cpr-yytext) != strlen(yytext)) {
VLerror(yylloc, "Invalid #line directive (extra garbage after "
"line number).");
delete[] buf;
return;
}
/* Now we can assign the new values to yyloc. */
yylloc.text = set_file_name(buf);
yylloc.first_line = lineno;
}
/*
* The line directive matches lines of the form `line N "foo" M and
* calls this function. Here I parse out the file name and line
* number, and change the yylloc to suite. M is ignored.
*/
static void line_directive2()
{
char *cpr;
/* Skip any leading space. */
char *cp = strchr(yytext, '`');
/* Skip the `line directive. */
assert(strncmp(cp, "`line", 5) == 0);
cp += 5;
/* strtoul skips leading space. */
unsigned long lineno = strtoul(cp, &cpr, 10);
if (cp == cpr) {
VLerror(yylloc, "Invalid line number for `line directive.");
return;
}
lineno -= 1;
cp = cpr;
/* Skip the space between the line number and the file name. */
cpr += strspn(cp, " \t");
if (cp == cpr) {
VLerror(yylloc, "Invalid `line directive (missing space after "
"line number).");
return;
}
cp = cpr;
/* Find the starting " and skip it. */
char*fn_start = strchr(cp, '"');
if (cp != fn_start) {
VLerror(yylloc, "Invalid `line directive (file name start).");
return;
}
fn_start += 1;
/* Find the last ". */
char*fn_end = strrchr(fn_start, '"');
if (!fn_end) {
VLerror(yylloc, "Invalid `line directive (file name end).");
return;
}
/* Skip the space after the file name. */
cp = fn_end + 1;
cpr = cp;
cpr += strspn(cp, " \t");
if (cp == cpr) {
VLerror(yylloc, "Invalid `line directive (missing space after "
"file name).");
return;
}
cp = cpr;
/* Check that the level is correct, we do not need the level. */
if (strspn(cp, "012") != 1) {
VLerror(yylloc, "Invalid level for `line directive.");
return;
}
cp += 1;
/* Verify that only space and/or a single line comment is left. */
cp += strspn(cp, " \t");
if (strncmp(cp, "//", 2) != 0 &&
(size_t)(cp-yytext) != strlen(yytext)) {
VLerror(yylloc, "Invalid `line directive (extra garbage after "
"level).");
return;
}
/* Copy the file name and assign it and the line number to yylloc. */
char*buf = new char[fn_end-fn_start+1];
strncpy(buf, fn_start, fn_end-fn_start);
buf[fn_end-fn_start] = 0;
yylloc.text = set_file_name(buf);
yylloc.first_line = lineno;
}
extern FILE*vl_input;
void reset_lexor()
{
yyrestart(vl_input);
yylloc.first_line = 1;
/* Announce the first file name. */
yylloc.text = set_file_name(strdupnew(vl_file.c_str()));
}
/*
* Modern version of flex (>=2.5.9) can clean up the scanner data.
*/
void destroy_lexor()
{
# ifdef FLEX_SCANNER
# if YY_FLEX_MAJOR_VERSION >= 2 && YY_FLEX_MINOR_VERSION >= 5
# if defined(YY_FLEX_SUBMINOR_VERSION) && YY_FLEX_SUBMINOR_VERSION >= 9
yylex_destroy();
# endif
# endif
# endif
}
|