Revision history for Verilator The contributors that suggested a given feature are shown in []. Thanks! * Verilator 4.035 devel **** Fix FST tracing of little bit endian signals. [Geza Lore] **** Fix +: and -: on unpacked arrays. (#2304) [engr248] * Verilator 4.034 2020-05-03 ** Add simplistic class support with many restrictions, see manual. (#377) ** Support IEEE time units and time precisions. (#234) Includes `timescale, $printtimescale, $timeformat. VL_TIME_MULTIPLIER, VL_TIME_PRECISION, VL_TIME_UNIT have been removed and the time precision must now match the SystemC time precision. To get closer behavior to older versions, use e.g. --timescale-override "1ps/1ps". ** Add --build to call make automatically. (#2249) [Yutetsu TAKATSUKASA] ** Configuring with ccache present now defaults to using it; see OBJCACHE. ** Fix DPI import/export to be standard compliant. (#2236) [Geza Lore] ** Add --trace-threads for general multithreaded tracing. (#2269) [Geza Lore] *** Add --flatten for use with --xml-only. (#2270) [James Hanlon] **** Greatly improve FST/VCD dump performance (#2244) (#2246) (#2250) (#2257) [Geza Lore] **** Support $ferror, and $fflush without arguments. (#1638) **** Support event data type (with some restrictions). **** Support $root. (#2150) [Keyi Zhang] **** Add error if use SystemC 2.2 and earlier (pre-2011) as is deprecated. **** Fix build of fast path tracing code to use OPT_FAST. (#2245) [Geza Lore] **** Fix arrayed instances connecting to slices. (#2263) [Don/engr248] **** Fix error on unpacked connecting to packed. (#2288) [Joseph Shaker] **** Fix logical not optimization with empty begin. (#2291) [Baltazar Ortiz] **** Fix reduction OR on wide data, broke in v4.026. (#2300) [Jack Koenig] **** Fix clock enables with bit-extends. (#2299) [Marco Widmer] **** Fix MacOs Homebrew by removing default LIBS. (#2298) [Ryan Clarke] * Verilator 4.032 2020-04-04 *** Add column numbers to errors and warnings. *** Add GCC 9-style line number prefix when showing source text for errors. *** Add setting VM_PARALLEL_BUILDS=1 when using --output-split. (#2185) *** Change --quiet-exit to also suppress 'Exiting due to N errors'. **** Suppress REALCVT for whole real numbers. **** Support split_var in vlt files. (#2219) [Marco Widmer] **** Fix parameter type redeclaring a type. (#2195) [hdzhangdoc] **** Fix VCD open with empty filename. (#2198) [Julius Baxter] **** Fix packages as enum base types. (#2202) [Driss Hafdi] **** Fix duplicate typedefs in generate for. (#2205) [hdzhangdoc] **** Fix MinW portability. (#2114) [Sean Cross] **** Fix assertions with unique case inside. (#2199) [hdzhangdoc] **** Fix implicit conversion of floats to wide integers. * Verilator 4.030 2020-03-08 ** Add split_var metacomment to assist UNOPTFLAT fixes. (#2066) [Yutetsu TAKATSUKASA] ** Add support for $dumpfile and $dumpvars. (#2126) [Alexander Grobman] ** Add support for dynamic arrays. (#379) *** Add +verilator+noassert flag to disable assertion checking. [Tobias Wölfel] *** Add check for assertOn for asserts. (#2162) [Tobias Wölfel] *** Add --structs-packed for forward compatibility. *** Fix genblk naming with directly nested generate blocks. (#2176) [Alexander Grobman] **** Implement $displayb/o/h, $writeb/o/h, etc. (#1637) **** Use gcc -Os in examples instead of -O2 for better average performance. **** Fix undeclared VL_SHIFTR_WWQ. (#2114) [Alex Solomatnikov] * Verilator 4.028 2020-02-08 ** Support attributes (public, isolate_assignments, etc.) in configuration files. ** Add -match to lint_off to waive warnings. [Philipp Wagner] *** Link Verilator binary partially statically. (#2146) [Geza Lore] *** Verilation speed improvements (#2133) (#2138) [Geza Lore] *** Support libgoogle-perftools-dev's libtcmalloc if available. (#2137) [Geza Lore] *** Support $readmem/$writemem with assoc arrarys. (#2100) [agrobman] **** Support type(expression) operator and $typename. (#1650) **** Support left justified $display. (#2101) [Pieter Kapsenberg] **** Support string character access via indexing. **** Support enum.next(k) with constant k > 1. (#2125) [Tobias Rosenkranz] **** Support parameter access from arrays of interfaces. (#2155) [Todd Strader] **** Add parameter values in XML. #2110. [Pieter Kapsenberg] **** Add loc column location in XML (replaces fl). (#2122) [Pieter Kapsenberg] **** Add error on misused define. [Topa Tota] **** Add parameter to set maximum signal width. (#2082) [Øyvind Harboe] **** Add warning on genvar in normal for loop. (#2143) [yurivict] **** Fix VPI scope naming for public modules. [Nandu Raj] **** Fix FST tracing of enums inside structs. [fsiegle] **** Fix WIDTH warning on " in assertions. (#2069) [Peter Monsson] *** Support string compare, ato*, etc methods. (#1606) [Yutetsu TAKATSUKASA] **** Support immediate cover statements. **** Ignore `uselib to end-of-line. (#1634) [Frederic Antonin] **** Update FST trace API for better performance. **** Add vpiTimeUnit and allow to specify time as string. (#1636) [Stefan Wallentowitz] **** Add error when `resetall inside module (IEEE 2017-22.3). **** Add cleaner error on version control conflicts in sources. **** Fix little endian cell ranges. (#1631) [Julien Margetts] **** Fix queue issues (#1641) (#1643) [Peter Monsson, Stefan Wallentowitz] **** Fix strcasecmp for windows. (#1651) [Kuba Ober] **** Fix disable iff in assertions. Closes #1404. [Peter Monsson] **** Fix huge case statement performance. Closes #1644. [Julien Margetts] **** Fix tracing -1 index arrays. Closes #2090. [Yutetsu Takatsukasa] **** Fix expand optimization slowing --lint-only. Closes #2091. [Thomas Watts] **** Fix %{number}s with strings. #2093. [agrobman] **** Fix shebang breaking some shells. Closes #2067. [zdave] * Verilator 4.024 2019-12-08 ** Support associative arrays (excluding [*] and pattern assignments). (#544) ** Support queues (excluding {} notation and pattern assignments). (#545) *** Add +verilator+error+limit to see more assertion errors. [Peter Monsson] *** Support string.toupper and string.tolower. *** Support $rewind and $ungetc. *** Support shortreal as real, with a SHORTREAL warning. **** Add -Wpedantic and -Wno-context for compliance testing. **** Add error on redefining preprocessor directives. [Piotr Binkowski] **** Support $value$plusargs float and shorts. (#1592) (#1619) [Garrett Smith] **** Fix gate lvalue optimization error. (#831) [Jonathon Donaldson, Driss Hafdi] **** Fix color assertion on empty if. (#1604) [Andrew Holme] **** Fix for loop missing initializer. (#1605) [Andrew Holme] **** Fix hang on concat error. (#1608) [Bogdan Vukobratovic] **** Fix VPI timed callbacks to be one-shot, pull5. [Matthew Ballance] **** Fix // in filenames. (#1610) [Peter Nelson] **** Fix $display("%p") to be closer to IEEE. **** Fix labels on functions with returns. (#1614) [Mitch Hayenga] **** Fix false unused message on __Vemumtab. (#2061) [Tobias Rosenkranz] **** Fix assertion on dotted parameter arrayed function. (#1620) [Rich Porter] **** Fix interface reference tracing. (#1595) [Todd Strader] **** Fix error on unpacked concatenations. (#1627) [Driss Hafdi] * Verilator 4.022 2019-11-10 ** Add --protect-lib. (#1490) [Todd Strader] ** Add cmake support. (#1363) [Patrick Stewart] *** Examples have been renamed. *** Add --protect-ids to obscure information in objects. (#1521) [Todd Strader] *** Add --trace-coverage. *** Add --xml-output. *** Support multithreading on Windows. [Patrick Stewart] *** Suppress 'command failed' on normal errors. *** Support some unpacked arrays in parameters. (#1315) [Marshal Qiao] *** Add interface port visibility in traces. (#1594) [Todd Strader] **** Increase case duplicate/incomplete to 16 bit tables. (#1545) [Yossi Nivin] **** Support quoted arguments in -f files. (#1535) [Yves Mathieu] **** Optimize modulus by power-of-two constants, and masked conditionals. **** Fix detecting missing reg types. (#1570) [Jacko Dirks] **** Fix multithreaded yield behavior when no work. [Patrick Stewart] **** Fix bad-syntax crashes. (#1548, #1550-#1553, #1557-#1560, #1563, #1573-#1577, #1579, #1582-#1591) [Eric Rippey] **** Fix false CMPCONST/UNSIGNED warnings on "inside". (#1581) [Mitch Hayenga] * Verilator 4.020 2019-10-06 *** Add --public-flat-rw. (#1511) [Stefan Wallentowitz] *** Support $fseek, $ftell, $frewind. (#1496) [Howard Su] *** Support vpiModule. (#1469) [Stefan Wallentowitz] **** Make Syms file honor --output-split-cfuncs. (#1499) [Todd Strader] **** Fix make test with no VERILATOR_ROOT. (#1494) [Ahmed El-Mahmoudy] **** Fix error on multidimensional cells. (#1505) [Anderson Ignacio Da Silva] **** Fix config_rev revision detection on old versions. **** Fix false warning on backward indexing. (#1507) [Hao Shi] **** Fix vpiType accessor. (#1509) (#1510) [Stefan Wallentowitz] **** Fix ugly error on interface misuse. (#1525) [Bogdan Vukobratovic] **** Fix misc bad-syntax crashes. (#1529) (#1530) (#1531) (#1532) (#1533) [Eric Rippey] **** Fix case statements with strings. (#1536) [Philipp Wagner] **** Fix some coverage lost when multithreaded. (#2151) * Verilator 4.018 2019-08-29 ** When showing an error, show source code and offer suggestions of replacements. ** When showing an error, show the instance location. (#1305) [Todd Strader] *** Add --rr. (#1481) [Todd Strader] *** Change MULTITOP to warning to help linting, see manual. *** Add XSim support to driver.pl. (#1493) [Todd Strader] **** Show included-from filenames in warnings. (#1439) [Todd Strader] **** Fix elaboration time errors. (#1429) [Udi Finkelstein] **** Fix not reporting some duplicate signals/ports. (#1462) [Peter Gerst] **** Fix not in array context on non-power-of-two slices. (#2027) [Yu Sheng Lin] **** Fix system compile flags injection. [Gianfranco Costamagna] **** Fix enum values not being sized based on parent. (#1442) [Dan Petrisko] **** Fix internal error on gate optimization of assign. (#1475) [Oyvind Harboe] **** Add --dpi-hdr-only. (#1491) [Todd Strader] * Verilator 4.016 2019-06-16 *** Add --quiet-exit. (#1436) [Todd Strader] **** Error continuation lines no longer have %Error prefix. **** Support logical equivalence operator <->. **** Support VerilatedFstC set_time_unit. (#1433) [Pieter Kapsenberg] **** Support deferred assertions. (#1449) [Charles Eddleston] **** Mark infrequently called functions with GCC cold attribute. **** Fix sign-compare warning in verilated.cpp. (#1437) [Sergey Kvachonok] **** Fix fault on $realtime with %t. (#1443) [Julien Margetts] **** Fix $display with string without %s. (#1441) [Denis Rystsov] **** Fix parameter function string returns. (#1441) [Denis Rystsov] **** Fix invalid XML output due to special chars. (#1444) [Kanad Kanhere] **** Fix performance when mulithreaded on 1 CPU. (#1455) [Stefan Wallentowitz] **** Fix type and real parameter issues (#1427) (#1456) (#1458) [Todd Strader] **** Fix build error on MinGW. (#1460) [Richard Myers] **** Fix not reporting some duplicate signals. (#1462) [Peter Gerst] **** Fix --savable invalid C++ on packed arrays. (#1465) [Alex Chadwick] **** Fix constant function return of function var. (#1467) [Roman Popov] * Verilator 4.014 2019-05-08 *** Add --trace-fst-thread. **** Support '#' comments in $readmem. (#1411) [Frederick Requin] **** Support "'dx" constants. (#1423) [Udi Finkelstein] **** For FST tracing use LZ4 compression. [Tony Bybell] **** Add error when use parameters without value. (#1424) [Peter Gerst] **** Auto-extend and WIDTH warn on unsized X/Zs. (#1423) [Udi Finkelstein] **** Fix missing VL_SHIFTL_ errors. (#1412) (#1415) [Larry Lee] **** Fix MinGW GCC 6 printf formats. (#1413) [Sergey Kvachonok] **** Fix test problems when missing fst2vcd. (#1417) [Todd Strader] **** Fix GTKWave register warning. (#1421) [Pieter Kapsenberg] **** Fix FST enums not displaying. (#1426) [Danilo Ramos] **** Fix table compile error with multiinterfaces. (#1431) [Bogdan Vukobratovic] * Verilator 4.012 2019-03-23 *** Add +verilator+seed. (#1396) [Stan Sokorac] *** Support $fread. [Leendert van Doorn] *** Support void' cast on functions called as tasks. (#1383) [Al Grant] *** Add IGNOREDRETURN warning. (#1383) **** Report PORTSHORT errors on concat constants. (#1400) [Will Korteland] **** Fix VERILATOR_GDB being ignored. (#2017) [Yu Sheng Lin] **** Fix $value$plus$args missing verilated_heavy.h. [Yi-Chung Chen] **** Fix MSVC compile error. (#1406) [Benjamin Gartner] **** Fix maintainer test when no Parallel::Forker. (#1977) [Enzo Chi] **** Fix +1364-1995ext flags applying too late. (#1384) [Al Grant] * Verilator 4.010 2019-01-27 *** Removed --trace-lxt2, use --trace-fst instead. **** For --xml, add additional information. (#1372) [Jonathan Kimmitt] **** Add circular typedef error. (#1388) [Al Grant] **** Add unsupported for loops error. (#1986) [Yu Sheng Lin] **** Fix FST tracing of wide arrays. (#1376) [Aleksander Osman] **** Fix error when pattern assignment has too few elements. (#1378) [Viktor Tomov] **** Fix error when no modules in $unit. (#1381) [Al Grant] **** Fix missing too many digits warning. (#1380) [Jonathan Kimmitt] **** Fix uninitialized data in verFiles and unroller. (#1385) (#1386) [Al Grant] **** Fix internal error on xrefs into unrolled functions. (#1387) [Al Grant] **** Fix DPI export void compiler error. (#1391) [Stan Sokorac] * Verilator 4.008 2018-12-01 *** Support "ref" and "const ref" pins and functions. (#1360) [Jake Longo] *** In --xml-only show the original unmodified names, and add module_files and cells similar to Verilog-Perl, msg2719. [Kanad Kanhere] **** Add CONTASSREG error on continuous assignments to regs. (#1369) [Peter Gerst] **** Add PROCASSWIRE error on behavioral assignments to wires, msg2737. [Neil Turton] **** Add IMPORTSTAR warning on import::* inside $unit scope. **** Fix --trace-lxt2 compile error on MinGW. (#1990) [HyungKi Jeong] **** Fix hang on bad pattern keys. (#1364) [Matt Myers] **** Fix crash due to cygwin bug in getline. (#1349) [Affe Mao] **** Fix __Slow files getting compiled with OPT_FAST. (#1370) [Thomas Watts] * Verilator 4.006 2018-10-27 ** Add --pp-comments. (#1988) [Robert Henry] ** Add --dump-defines. *** For --trace-fst, save enum decoding information. (#1358) [Sergi Granell] (To visualize enumeration data you must use GTKwave 3.3.95 or newer.) *** For --trace-fst, instead of *.fst.hier, put data into *.fst. [Tony Bybell] **** Fix --trace-lxt2 compile error on MinGW, msg2667. [HyungKi Jeong] **** Fix Windows .exe not found. (#1361) [Patrick Stewart] * Verilator 4.004 2018-10-06 ** Add GTKWave FST native tracing. (#1356) [Sergi Granell] (Verilator developers need to pull the latest vcddiff.) *** Support $past. [Dan Gisselquist] *** Support restrict. (#1350) [Clifford Wolf] *** Rename include/lxt2 to include/gtkwave. **** Fix replication of 64-bit signal change detects. **** Fix Mac OSX 10.13.6 / LLVM 9.1 compile issues. (#1348) [Kevin Kiningham] **** Fix MinGW compile issues. (#1979) [HyungKi Jeong] * Verilator 4.002 2018-09-16 ** This is a major release. Any patches may require major rework to apply. [Thanks everyone] ** Add multithreaded model generation. ** Add runtime arguments. ** Add GTKWave LXT2 native tracing. (#1333) [Yu Sheng Lin] ** Note $random has new algorithm; results may vary vs. previous versions. *** Better optimize large always block splitting. (#1244) [John Coiner] *** Add new reloop optimization for repetitive assignment compression. *** Support string.atoi and similar methods. (#1289) [Joel Holdsworth] **** Fix internals to be C++ null-pointer-check clean. **** Fix internals to avoid 'using namespace std'. **** Fix Verilation performance issues. (#1316) [John Coiner] **** Fix clocker attributes to not propagate on concats. [John Coiner] **** Fix first clock edge and --x-initial-edge. (#1327) [Rupert Swarbrick] **** Fix compile error on tracing of string arrays. (#1338) [Iztok Jeras] **** Fix number parsing with newline after radix. (#1340) [George Cuan] **** Fix string ?: conditional type resolution. (#1345) [Iztok Jeras] **** Fix duplicate symbol error on generate tri. (#1347) [Tomas Dzetkulic] * Verilator 3.926 2018-08-22 **** Add OBJCACHE envvar support to examples and generated Makefiles. **** Change MODDUP errors to warnings. (#1969) [Marshal Qiao] **** Fix define argument stringification (`"), broke since 3.914. [Joe DErrico] **** Fix to ignore Unicode UTF-8 BOM sequences. (#1967) [HyungKi Jeong] **** Fix std:: build error. (#1322) **** Fix function inlining inside certain while loops. (#1330) [Julien Margetts] * Verilator 3.924 2018-06-12 *** Renamed --profile-cfuncs to --prof-cfuncs. **** Report interface ports connected to wrong interface. (#1294) [Todd Strader] **** When tracing, use scalars on single bit arrays to appease vcddiff. **** Fix parsing "output signed" in V2K port list, msg2540. [James Jung] **** Fix parsing error on bad missing #. (#1308) [Dan Kirkham] **** Fix $clog2 to be in verilog 2005. (#1319) [James Hutchinson] * Verilator 3.922 2018-03-17 ** Support IEEE 1800-2017 as default language. *** Support trig functions ($sin() etc). (#1281) [Patrick Stewart] *** Support calling system functions as tasks. (#1285) [Joel Holdsworth] *** Support assert properties. (#785) (#1290) [John Coiner, et al] *** Support $writememh. [John Coiner] *** Add --no-debug-leak to reduce memory use under debug. [John Coiner] **** Fix severe runtime performance bug in certain foreach loops. [John Coiner] **** On convergence errors, show activity. [John Coiner] **** Fix GCC 8.0 issues. (#1273) **** Fix pullup/pulldowns on bit selects. (#1274) [Rob Stoddard] **** Fix verilator_coverage --annotate-min. (#1284) [Tymoteusz Blazejczyk] **** Fix quoting of quoted arguments. [John Coiner] * Verilator 3.920 2018-02-01 ** Moving forward, use the git "stable" branch to track the latest release, and git "v#.###" tags for specific releases. *** Support 'assume' similar to 'assert'. (#1269) [Dan Gisselquist] **** Fix tracing example file output. (#1268) [Enzo Chi] **** Fix gate optimization out of memory, add --gate-stmts. (#1260) [Alex Solomatnikov] **** Fix compile error on public real parameters by suppressing. (#1261) [Alex Solomatnikov] **** Fix input-only tristate comparisons. (#1267) [Alexis G] **** Fix missing edge type in xml output. (#1955) [Alexis G] **** Fix compile error with --public and interface bind. (#1264) [Alexis G] **** Remove c++filt. (#1265) [Stefan Wallentowitz] * Verilator 3.918 2018-01-02 *** Workaround GCC/clang bug with huge compile times. (#1248) *** Support DPI open arrays. (#909) (#1245) [David Pierce, Victor Besyakov] *** Add INFINITELOOP warning. (#1254) [Alex Solomatnikov] **** Support > 64 bit decimal $display. **** Support DPI time and svLogicVal. [Victor Besyakov] Note older version incorrectly assumed svBitVal even for logicals. **** Support string len() method. [Victor Besyakov] **** Add error if always_comb has sensitivity list. [Arjen Roodselaar] **** Fix SystemC 2.3.2 compile error. (#1251) [Tymoteusz Blazejczyk] **** Fix modport outputs being treated as inputs. (#1246) [Jeff Bush] **** Fix false ALWCOMBORDER on interface references. (#1247) [Josh Redford] **** Fix constant propagation across DPI imports of inout strings. [Victor Besyakov] **** Fix resolving inline nested interface names. (#1250) [Arjen Roodselaar] * Verilator 3.916 2017-11-25 *** Support self-recursive modules. (#659) [Sean Moore, et al] *** Support $error/$warning in elaboration time blocks. *** Support $size/$bits/etc on type references. *** Add error when driving input-only modport. (#1110) [Trevor Elbourne] *** Add BSSPACE and COLONPLUS lint warnings. **** Detect MSB overflow when under VL_DEBUG. (#1238) [Junyi Xi] **** Add data types to --xml. [Rui Terra] **** Fix partial slicing with pattern assignments. (#991) [Johan Bjork] **** Fix false unused warning on interfaces. (#1241) [Laurens van Dam] **** Fix error on "unique case" with no cases. **** Fix MacOS portability. (#1232) [Jeff Bush] * Verilator 3.914 2017-10-14 ** Added new examples/ directory with appropriate examples. This replaces the old test_c and test_sc directories. *** Add --getenv option for simplifying Makefiles. *** Add --x-initial option for specifying initial value assignment behavior. *** Add --no-relative-cfuncs and related default optimization. (#1224) [John Coiner] *** Add /*verilator tag*/ for XML extraction applications. [Chris Randall] **** The internal test_verilated test directory is moved to be part of test_regress. **** The experimental VL_THREADED setting (only, not normal mode) now requires C++11. **** Fix over-aggressive inlining. (#1223) [John Coiner] **** Fix Ubuntu 17.10 issues. (#1223 partial). [John Coiner] **** Fix compiler warning when WIDTH warning ignored on large compare. **** Fix memory leak in VerilatedVcd dumps. (#1222 partial) [Shareef Jalloq] **** Fix unnecessary Vdly variables. (#1224 partial) [John Coiner] **** Fix conditional slices and add related optimizations. **** Fix `` expansion of `defines. (#1225) (#1227) (#1228) [Odd Magne Reitan] **** Fix -E duplicating output. (#1226) [Odd Magne Reitan] **** Fix float-conversion warning. (#1229) [Robert Henry] **** Fix MacOS portability. (#1230) (#1231) [Jeff Bush] * Verilator 3.912 2017-09-23 ** Verilated headers no longer "use namespace std;" User's code without "std::" prefixes may need "use namespace std;" to compile. *** Support or/and/xor array intrinsic methods. (#1210) [Mike Popoloski] *** Support package export. (#1217) [Usuario Eda] *** Fix ordering of arrayed cell wide connections. (#1202 partial) [Mike Popoloski] **** Support module port parameters without defaults. (#1213) [Mike Popoloski] **** Add performance information to --stats file. **** Simplify VL_CONST_W macro generation for faster compiles. **** Fix LITENDIAN warning on arrayed cells. (#1202) [Mike Popoloski] **** Fix enum ranges without colons. (#1204) [Mike Popoloski] **** Fix GCC noreturn compile error. (#1209) [Mike Popoloski] **** Fix constant function default parameters. (#1211) [Mike Popoloski] **** Fix non-colon array of interface modports. (#1212) [Mike Popoloski] **** Fix .name connections on interfaces. (#1214) [Mike Popoloski] **** Fix wide array indices causing compile error. **** Better optimize Shift-And, and replication constructs. * Verilator 3.910 2017-09-07 *** SystemPerl mode (-sp-deprecated) has been removed. **** Update keyword warnings to include C++11 and others. * Verilator 3.908 2017-08-28 **** Support x in $readmem. (#1180) [Arthur Kahlich] **** Support packed struct DPI imports. (#1190) [Rob Stoddard] **** Fix GCC 6 warnings. **** Fix compile error on unused VL_VALUEPLUSARGS_IW. (#1181) [Thomas J Whatson] **** Fix undefined VL_POW_WWI. [Clifford Wolf] **** Fix internal error on unconnected inouts. (#1187) [Rob Stoddard] * Verilator 3.906 2017-06-22 *** Support set_time_unit/set_time_precision in C traces. (#1937) *** Fix extract of packed array with non-zero LSB. (#1172) [James Pallister] *** Fix shifts by more than 32-bit numbers. (#1174) [Clifford Wolf] *** Fix power operator on wide constants. (#761) [Clifford Wolf] *** Fix .* on interface pins. (#1176) [Maciej Piechotka] * Verilator 3.904 2017-05-30 *** Fix non-cutable ordering loops on clock arrays. (#1009) [Todd Strader] *** Support ports of array of reals. (#1154) [J Briquet] *** Support arrayed parameter overrides. (#1153) [John Stevenson] *** Support $value$plusargs with variables. (#1165) [Wesley Terpstra] **** Support modport access to un-modport objects. (#1161) [Todd Strader] **** Add stack trace when can't optimize function. (#1158) [Todd Strader] **** Add warning on mis-sized literal. (#1156) [Todd Strader] **** Fix interface functions returning wrong parameters. (#996) [Todd Strader] **** Fix non-arrayed cells with interface arrays. (#1153) [John Stevenson] **** Fix --assert with complex case statements. (#1164) [Enzo Chi] * Verilator 3.902 2017-04-02 ** Add -FI option to force includes. (#1916) [Amir Gonnen] ** Add --relative-includes. [Rob Stoddard] *** Add error on duplicate pattern assignments. (#1145) [Johan Bjork] **** Fix error on improperly widthed default function. (#984) [Todd Strader] **** Fix 2009 localparam syntax, msg2139. [Galen Seitz] **** Fix ugly interface-to-non-interface errors. (#1112) [Johan Bjork] **** Fix LDFLAGS and CFLAGS not preserving order. (#1130) [Olof Kindgren] **** Fix internal error on initializing parameter array. (#1131) [Jie Xu] **** Fix internal error on interface arrays. (#1135) [John Stevenson] **** Fix calling sformatf to display, and elab $displays. (#1139) [Johan Bjork] **** Fix realpath compile issue on MSVC++. (#1141) [Miodrag Milanovic] **** Fix missing error on interface size mismatch. (#1143) [Johan Bjork] **** Fix error on parameters with dotted references. (#1146) [Johan Bjork] **** Fix wreal not handling continuous assign. (#1150) [J Briquet] **** Fix nested structure parameter selects. (#1150) [J Briquet] * Verilator 3.900 2017-01-15 ** Internal code changes for improved compatibility and performance. *** Support old-style $display($time). (#467) [John Demme] **** With --bbox-unsup, suppress desassign and mixed edges. (#1120) [Galen Seitz] **** Fix parsing sensitivity with &&. (#934) [Luke Yang] **** Fix internal error on double-for loop unrolling. (#1044) [Jan Egil Ruud] **** Fix internal error on unique casez with --assert. (#1117) [Enzo Chi] **** Fix bad code when tracing array of structs. (#1122) [Andrew Bardsley] * Verilator 3.890 2016-11-25 *** Honor --output-split on coverage constructors. (#1098) [Johan Bjork] **** Fix various issues when making outside of the kit. **** Fix flex 2.6.2 bug. (#1103) [Sergey Kvachonok] **** Fix error on bad interface name. (#1097) [Todd Strader] **** Fix error on referencing variable in parent. (#1099) [Ian Thompson] **** Fix type parameters with low optimization. (#1101) [Stefan Wallentowitz] * Verilator 3.888 2016-10-14 ** Support foreach. (#1078) [Xuan Guo] *** Add --no-decoration to remove output comments, msg2015. [Frederic Requin] *** If VM_PARALLEL_BUILDS=1, use OPT_FAST and OPT_SLOW. [Frederic Requin] Set VM_DEFAULT_RULES=0 for old behavior. **** Add error on DPI functions > 32 bits. (#1898) [Elliot Mednick] **** Fix SystemC compiles with VPI. (#1081) [Arthur Kahlich] **** Fix error on wide numbers that represent shifts, msg1991. (#1088) [Mandy Xu] **** Improve Verilation performance on internal strings. (#1896) [Johan Bjork] **** Improve Verilation performance on trace duplicates. (#1090) [Johan Bjork] * Verilator 3.886 2016-07-30 **** Fix enum values of 11-16 bits wide using .next/.prev. (#1062) [Brian Flachs] **** Fix false warnings on non-power-2 enums using .next/.prev. **** Fix comparison of unpacked arrays. (#1071) [Andrew Bardsley] **** Fix compiler warning in GCC 6. [David Horton] * Verilator 3.884 2016-05-18 ** Support parameter type. (#376) [Alan Hunter, et al] ** Support command-line -G/+pvalue param overrides. (#1045) [Stefan Wallentowitz] *** The default l2 scope name is now the same as the top-level module. (#1050) Use "--l2-name v" for the historical behavior. *** Add --l2-name option for controlling "v" naming. **** Fix --output-split of constructors. (#1035) [Johan Bjork] **** Fix removal of empty packages, modules and cells. (#1034) [Johan Bjork] **** Fix core dump on Arch Linux/GCC 6.1.1. (#1058) [Jannis Harder] **** Fix $value$plusargs to string. (#1880) [Frederic Requin] * Verilator 3.882 2016-03-01 **** Internal Verilation-time performance enhancements. (#1021) [Johan Bjork] **** Support inlining interfaces. (#1018) [Johan Bjork] **** Support SV strings to readmemh. (#1040) [Stefan Wallentowitz] **** Fix unrolling complicated for-loop bounds. (#677) [Johan Bjork] **** Fix stats file containing multiple unroll entries. (#1020) [Johan Bjork] **** Fix using short parameter names on negative params. (#1022) [Duraid Madina] **** Fix read-after-free error. (#1031) [Johan Bjork] **** Fix elaboration-time display warnings. (#1032) [Johan Bjork] **** Fix crash on very deep function trees. (#1028) [Jonathan Kimmitt] **** Fix slicing mix of big and little-endian. (#1033) [Geoff Barrett] **** Fix pattern assignment width propagation. (#1037) [Johan Bjork] * Verilator 3.880 2015-12-19 *** Support display %u, %v, %p, %z. (#989) [Johan Bjork] **** Fix real parameters causing bad module names. (#992) [Johan Bjork] **** Fix size-changing cast on packed struct. (#993) [Johan Bjork] **** Fix function calls on arrayed interface. (#994) [Johan Bjork] **** Fix arrayed interfaces. (#879) (#1001) [Todd Strader] **** Fix constant function assigned to packed structs. (#997) [Johan Bjork] **** Fix interface inside generate. (#998) [Johan Bjork] **** Fix $signed casts under generates. (#999) [Clifford Wolf] **** Fix genvar constant propagation. (#1003) [Johan Bjork] **** Fix parameter constant propagation from package. (#1004) [Johan Bjork] **** Fix array slicing of non-const indexes. (#1006) [Johan Bjork] **** Fix dotted generated array error. (#1005) [Jeff Bush, Johan Bjork] **** Fix error instead of warning on large concat. (#1865) [Paul Rolfe] **** Fix $bitstoreal constant propagation. (#1012) [Jonathan Kimmitt] **** Fix model restore crash. (#1013) [Jason McMullan] **** Fix arrayed instances to unpacked of same size. (#1015) [Varun Koyyalagunta] **** Fix slices of unpacked arrays with non-zero LSBs. **** Fix ternary operation with unpacked array. (#1017) [Varun Koyyalagunta]. * Verilator 3.878 2015-11-01 ** Add --vpi flag, and fix VPI linkage. (#969) [Arthur Kahlich] ** Support genvar indexes into arrayed cells. (#517) [Todd Strader] ** Support $sformatf. (#977) [Johan Bjork] *** Support elaboration assertions. (#973) [Johan Bjork] *** Support $display with non-format arguments. (#467) [Jamey Hicks] **** Add VerilatedScopeNameMap for introspection. (#966) [Todd Strader] **** Ignore %l in $display. (#983) [Todd Strader] **** Fix very long module names. (#937) [Todd Strader] **** Fix internal error on dotted refs into generates. (#958) [Jie Xu] **** Fix structure parameter constant propagation. (#968) [Todd Strader] **** Fix enum constant propagation. (#970) [Todd Strader] **** Fix mis-optimizing public DPI functions. (#963) [Wei Song] **** Fix package:scope.scope variable references. **** Fix $fwrite to constant stderr/stdout. (#961) [Wei Song] **** Fix struct.enum.name method calls. (#855) [Jonathon Donaldson] **** Fix dot indexing into arrayed inferfaces. (#978) [Johan Bjork] **** Fix crash in commandArgsPlusMatch. (#987) [Jamie Iles] **** Fix error message on missing interface. (#985) [Todd Strader] * Verilator 3.876 2015-08-12 *** Add tracing_on, etc to vlt files. (#932) [Frederic Requin] **** Support extraction of enum bits. (#951) [Jonathon Donaldson] **** Fix MinGW compiler error. (#927) (#929) [Hans Tichelaar] **** Fix .c files to be treated as .cpp. (#930) [Jonathon Donaldson] **** Fix string-to-int space conversion. (#931) [Fabrizio Ferrandi] **** Fix dpi imports inside generates. [Michael Tresidder] **** Fix rounding in trace $timescale. (#946) [Frederic Requin] **** Fix $fopen with SV string. (#947) [Sven Stucki] **** Fix hashed error with typedef inside block. (#948) [Sven Stucki] **** Fix makefile with --coverage. (#953) [Eivind Liland] **** Fix coverage documentation. (#954) [Thomas J Whatson] **** Fix parameters with function parameter arguments. (#952) [Jie Xu] **** Fix size casts as second argument of cast item. (#950) [Jonathon Donaldson] * Verilator 3.874 2015-06-06 *** Add pkg-config .pc file. (#919) [Stefan Wallentowitz] **** Fix installing missing manpages. (#908) [Ahmed El-Mahmoudy] **** Fix sign extension in large localparams. (#910) [Mike Thyer] **** Fix core dump in sync-async warnings. (#911) [Sebastian Dressler] **** Fix truncation warning with -pins-bv. (#912) [Alfonso Martinez] **** Fix Cygwin uint32 compile. (#914) [Matthew Barr] **** Fix preprocessing stringified newline escapes. (#915) [Anton Rapp] **** Fix part-select in constant function. (#916) [Andrew Bardsley] **** Fix width extension on mis-width ports. (#918) [Patrick Maupin] **** Fix width propagation on sized casts. (#925) [Jonathon Donaldson] **** Fix MSVC++ compiler error. (#927) [Hans Tichelaar] * Verilator 3.872 2015-04-05 *** Add VerilatedVcdFile to allow real-time waveforms. (#890) [HyungKi Jeong] *** Add --clk and related optimizations. (#1840) [Jie Xu] *** Fix order of C style arrays. [Duraid Madina] **** Add --dump-treei-. (#894) [Jie Xu] **** Fix comma-instantiations with parameters. (#884) [Franck Jullien] **** Fix SystemC arrayed bit vectors. (#886) [David Poole] **** Fix compile error on MinGW. (#887) [HyungKi Jeong] * Verilator 3.870 2015-02-12 **** Suppress COMBDLY when inside always_latch. (#864) [Iztok Jeras] **** Support cast operator with expression size. (#865) [Iztok Jeras] **** Add warning on slice selection out of bounds. (#875) [Cong Van Nguyen]. **** Fix member select error broke in 3.868. (#867) [Iztok Jeras] **** Fix $sccanf from string. (#866) [David Pierce] **** Fix VM_PARALLEL_BUILDS broke in 3.868. (#870) [Hiroki Honda] **** Fix non-ANSI modport instantiations. (#868) [Kevin Thompson] **** Fix UNOPTFLAT change detect on multidim arrays. (#872) [Andrew Bardsley] **** Fix slice connections of arrays to ports. (#880) [Varun Koyyalagunta] **** Fix mis-optimizing gate assignments in unopt blocks. (#881) [Mike Thyer] **** Fix sign extension of pattern members. (#882) [Iztok Jeras] **** Fix clang compile warnings. * Verilator 3.868 2014-12-20 ** New verilator_coverage program added to replace SystemPerl's vcoverage. ** PSL support was removed, please use System Verilog assertions. ** SystemPerl mode is deprecated and now untested. *** Support enum.first/name and similar methods. (#460) (#848) *** Add 'string' printing and comparisons. (#746) (#747) etc. *** Inline C functions that are used only once. (#1838) [Jie Xu] *** Fix tracing SystemC signals with structures. (#858) [Eivind Liland] Note that SystemC traces will no longer show the signals in the wrapper, they can be seen one level further down. **** Add --stats-vars. (#851) [Jeremy Bennett] **** Fix bare generates in interfaces. (#789) [Bob Newgard] **** Fix underscores in real literals. (#863) [Jonathon Donaldson] * Verilator 3.866 2014-11-15 *** Fix +define+A+B to define A and B to match other simulators. (#847) [Adam Krolnik] *** Add optimization of wires from arrayed cells. (#1831) [Jie Xu] *** Add optimization of operators between concats. (#1831) [Jie Xu] *** Add public enums. (#833) [Jonathon Donaldson] *** Trace_off now operates on cells. (#826) [Lane Brooks] **** Fix public parameters in unused packages. (#804) [Jonathon Donaldson] **** Fix select when partially out-of-bound. (#823) [Cliffort Wolf] **** Fix generate unrolling with function call. (#830) [Steven Slatter] **** Fix cast-to-size context-determined sizing. (#828) [Geoff Barrett] **** Fix not tracing modules following primitives. (#837) [Jie Xu] **** Fix trace overflow on huge arrays. (#834) [Geoff Barrett] **** Fix quoted comment slashes in defines. (#845) [Adam Krolnik] * Verilator 3.864 2014-09-21 *** Support power operator with real. (#809) [Jonathon Donaldson] **** Improve verilator_profcfunc time attributions. [Jonathon Donaldson] **** Fix duplicate anonymous structures in $root. (#788) [Bob Newgard] **** Fix mis-optimization of bit-swap in wide signal. (#800) [Jie Xu] **** Fix error when tracing public parameters. (#722) [Jonathon Donaldson] **** Fix dpiGetContext in dotted scopes. (#740) [Geoff Barrett] **** Fix over-shift structure optimization error. (#803) [Jeff Bush] **** Fix optional parameter keyword in module #(). (#810) [Iztok Jeras] **** Fix $warning/$error multi-argument ordering. (#816) [Jonathon Donaldson] **** Fix clang warnings. (#818) [Iztok Jeras] **** Fix string formats under deep expressions. (#820) [Iztok Jeras] * Verilator 3.862 2014-06-10 *** Using command line -Wno-{WARNING} now overrides file-local lint_on. *** Add -P to suppress `line and blanks with preprocessing. (#781) [Derek Lockhart] *** Support SV 2012 package import before port list. **** Change SYMRSVDWORD to print as warning rather than error. **** Fix seg-fault with variable of parameterized interface. (#692) [Jie Xu] **** Fix false name conflict on cells in generate blocks. (#749) [Igor Lesik] **** Fix pattern assignment to basic types. (#767) [Jie Xu] **** Fix pattern assignment to conditionals. (#769) [Jie Xu] **** Fix shift corner-cases. (#765) (#766) (#768) (#772) (#774) (#776) [Clifford Wolf] **** Fix C compiler interpreting signing. (#773) [Clifford Wolf] **** Fix late constant division by zero giving X error. (#775) [Clifford Wolf] **** Fix gate primitives with arrays and non-arrayed pins. **** Fix DETECTARRAY error on packed arrays. (#770) [Jie Xu] **** Fix ENDLABEL warnings on escaped identifiers. **** Fix string corruption. (#780) [Derek Lockhart] * Verilator 3.860 2014-05-11 ** PSL is no longer supported, please use System Verilog assertions. ** Support '{} assignment pattern on arrays. (#355) ** Support streaming operators. (#649) [Glen Gibb] ** Fix expression problems with -Wno-WIDTH. (#729) (#736) (#737) (#759) Where WIDTH warnings were ignored this might result in different warning messages and results, though it should better match the spec. [Clifford Wolf] *** Add --no-trace-params. *** Add assertions on 'unique if'. (#725) [Jeff Bush] *** Add PINCONNECTEMPTY warning. [Holger Waechtler] *** Support parameter arrays. (#683) [Jeremy Bennett] *** Fix begin_keywords "1800+VAMS". (#1806) **** Documentation fixes. (#723) [Glen Gibb] **** Support {} in always sensitivity lists. (#745) [Igor Lesik] **** Fix tracing of package variables and real arrays. **** Fix tracing of packed arrays without --trace-structs. (#742) [Jie Xu] **** Fix missing coverage line on else-if. (#727) [Sharad Bagri] **** Fix modport function import not-found error. **** Fix power operator calculation. (#730) (#735) [Clifford Wolf] **** Fix reporting struct members as reserved words. (#741) [Chris Randall] **** Fix change detection error on unions. (#758) [Jie Xu] **** Fix -Wno-UNOPTFLAT change detection with 64-bits. (#762) [Clifford Wolf] **** Fix shift-right optimization. (#763) [Clifford Wolf] **** Fix Mac OS-X test issues. [Holger Waechtler] **** Fix C++-2011 warnings. * Verilator 3.856 2014-03-11 *** Support case inside. (#708) [Jan Egil Ruud] *** Add parameters into trace files. (#706) [Alex Solomatnikov] **** Fix parsing "#0 'b0". (#256) **** Fix array bound checks on real variables. **** Fix --skip-identical mis-detecting on OS-X. (#707) **** Fix missing VL_SHIFTRS_IQI with WIDTH warning. (#714) [Fabrizio Ferrandi] **** Fix signed shift right optimization. (#715) [Fabrizio Ferrandi] **** Fix internal error on "input x =" syntax error. (#716) [Lane Brooks] **** Fix slice extraction from packed array. (#717) [Jan Egil Ruud] **** Fix inside statement EQWILD error. (#718) [Jan Egil Ruud] * Verilator 3.855 2014-01-18 *** Support modport import. (#696) [Jeremy Bennett] *** Add --trace-structs to show struct names. (#673) [Chris Randall] **** Fix tracing of packed structs. (#705) [Jie Xu] **** Fix --lint-only with MinGW. (#1813) [HyungKi Jeong] **** Fix some delayed assignments of typedefed unpacked arrays. **** Fix wire declarations with size and not range. (#466) [Alex Solomatnikov] **** Fix parameter pin vs. normal pin error. (#704) [Alex Solomatnikov] * Verilator 3.854 2013-11-26 *** Add UNPACKED warning to convert unpacked structs. [Jeremy Bennett] *** Add --compiler clang to work around compiler bug. (#694) [Stefan Ludwig] **** Support vpi_get of vpiSuppressVal. (#687) [Varun Koyyalagunta] **** Support vpi_get_time. (#688) [Varun Koyyalagunta] **** Fix evaluation of chained parameter functions. (#684) [Ted Campbell] **** Fix enum value extension of '1. **** Fix multiple VPI variable callbacks. (#679) [Rich Porter] **** Fix vpi_get of vpiSize. (#680) [Rich Porter] **** Fix vpi_remove_cb inside callback. (#689) [Varun Koyyalagunta] **** Fix crash with coverage of structures. (#691) [Eivind Liland] **** Fix array assignment from const var. (#693) [Jie Xu] * Verilator 3.853 2013-09-30 **** Add --no-order-clock-delay to work around #613. [Charlie Brej] * Verilator 3.852 2013-09-29 *** Support named function and task arguments. [Chris Randall] *** Report SELRANGE warning for non-generate if. (#675) [Roland Kruse] **** Fix ordering of $fgetc. (#1808) [Frederic Requin] **** Fix --output-split-cfunc to count internal functions. [Chris Randall] **** Fix crash on 32-bit Ubuntu. (#670) [Mark Jackson Pulver] * Verilator 3.851 2013-08-15 *** Fix ordering of clock enables with delayed assigns. (#613) [Jeremy Bennett] *** Fix vpi_iterate on memory words. (#655) [Rich Porter] **** Fix final duplicate declarations when non-inlined. (#661) [Charlie Brej] **** Fix interface ports with comma lists. (#1779) [Ed Lander] **** Fix parameter real conversion from integer. **** Fix clang warnings. (#668) [Yutetsu Takatsukasa] * Verilator 3.850 2013-06-02 ** Support interfaces and modports. (#102) [Byron Bradley, Jeremy Bennett] *** Duplicate clock gate optimization on by default. (#621) **** Fix arrayed input compile error. (#645) [Krzysztof Jankowski] **** Fix GCC version runtime changes. (#651) [Jeremy Bennett] **** Fix packed array select internal error. (#652) [Krzysztof Jankowski] * Verilator 3.847 2013-05-11 *** Add ALWCOMBORDER warning. [KC Buckenmaier] *** Add --pins-sc-uint and --pins-sc-biguint. (#638) [Alex Hornung] **** Support "signal[vec]++". **** Fix simulation error when inputs and MULTIDRIVEN. (#634) [Ted Campbell] **** Fix module resolution with __. (#631) [Jason McMullan] **** Fix packed array non-zero right index select crash. (#642) [Krzysztof Jankowski] **** Fix nested union crash. (#643) [Krzysztof Jankowski] * Verilator 3.846 2013-03-09 ** IEEE 1800-2012 is now the default language. This adds 4 new keywords and updates the svdpi.h and vpi_user.h header files. *** Add --report-unoptflat. (#611) [Jeremy Bennett] *** Add duplicate clock gate optimization. (#1772) [Varun Koyyalagunta] Disabled unless -OD or -O3 used, please try it as may get some significant speedups. *** Fix wrong dot resolution under inlining. [Art Stamness] **** Support pattern assignment features. (#616) (#617) (#618) [Ed Lander] **** Support bind in $unit. (#602) [Ed Lander] **** Support '() sized casts. (#628) [Ed Lander] **** Fix DETECTARRAY on packed structures. (#610) [Jeremy Bennett] **** Fix LITENDIAN on unpacked structures. (#614) [Wai Sum Mong] **** Fix 32-bit OS VPI scan issue. (#615) [Jeremy Bennett, Rich Porter] **** Fix opening a VerilatedVcdC file multiple times. (#1774) [Frederic Requin] **** Fix UNOPTFLAT circular array bounds crossing. (#630) [Jie Xu] * Verilator 3.845 2013-02-04 *** Fix nested packed arrays and struct. (#600) [Jeremy Bennett] Packed arrays are now represented as a single linear vector in Verilated models. This may affect packed arrays that are public or accessed via the VPI. *** Support wires with data types. (#608) [Ed Lander] *** Support bind, to module names only. (#602) [Ed Lander] *** Support VPI product info, warning calls, etc. (#588) [Rick Porter] *** Support $left, $right and related functions. (#448) [Iztok Jeras] *** Support inside expressions. *** Define SYSTEMVERILOG, SV_COV_START and other IEEE mandated predefines. **** Fix pin width mismatch error. (#595) [Alex Solomatnikov] **** Fix implicit one bit parameter selection. (#603) [Jeremy Bennett] **** Fix signed/unsigned parameter misconversion. (#606) [Jeremy Bennett] **** Fix segfault on multidimensional dotted arrays. (#607) [Jie Xu] **** Fix per-bit array output connection error. (#414) [Jan Egil Ruud] **** Fix package logic var compile error. **** Fix enums with X values. * Verilator 3.844 2013-01-09 *** Support "unsigned int" DPI import functions. (#1770) [Alex Lee] *** Fix package resolution of parameters. (#586) [Jeremy Bennett] **** Fix non-integer vpi_get_value. (#587) [Rich Porter] **** Fix task inlining under $display and case. (#589) (#598) [Holger Waechtler] **** Fix package import of non-localparam parameter. (#474) (#591) [Jeremy Bennett] **** Fix package import of package imports, partial #592. [Jeremy Bennett] **** Fix package import preventing local var. (#599) [Jeremy Bennett] **** Fix array extraction of implicit vars. (#601) [Joe Eiler] * Verilator 3.843 2012-12-01 *** Add +1364-1995ext and similar language options. (#532) [Jeremy Bennett] **** Fix mis-optimized identical submodule subtract. (#581) [Charlie Brej] **** Fix crash on dotted references into dead modules. (#583) [Jeremy Bennett] **** Fix compile issues on MSVCC. (#571) (#577) [Amir Gonnen] **** Fix --debug overriding preceding --dump-treei. (#580) [Jeremy Bennett] * Verilator 3.842 2012-11-03 **** Add -x-initial-edge. (#570) [Jeremy Bennett] **** Fix parameter pins interspersed with cells broke in 3.840. [Bernard Deadman] **** Fix large shift error on large shift constants. [David Welch] **** Fix $display mangling on GCC 4.7 and speed up. (#1765) (#373) (#574) [R Diez] **** Fix array of struct references giving false error. (#566) [Julius Baxter] **** Fix missing var access functions when no DPI. (#572) [Amir Gonnen] **** Fix name collision on unnamed blocks. (#567) [Chandan Egbert] **** Fix name collision on task inputs. (#569) [Chandan Egbert] * Verilator 3.841 2012-09-03 *** Add --savable to support model save/restore. [Jeremy Bennett] *** Support '{} assignment pattern on structures, part of #355. **** Fix double-deep parameter cell WIDTHs. (#541) [Hiroki Honda] **** Fix imports under multiple instantiated cells. (#542) [Alex Solomatnikov] **** Fix defparam in generate broke in 3.840. (#543) [Alex Solomatnikov] **** Fix duplicate begin error broke in 3.840. (#548) [Alex Solomatnikov] **** Fix triangle symbol resolution error broke in 3.840. (#550) [Ted Campbell] * Verilator 3.840 2012-07-31 Beta ** Rewrote tristate handling; supports tri0, tri1, tristate bit selects, concatenates and pullup/pulldowns. (#395) (#56) (#54) (#51) [Alex Solomatnikov, Lane Brooks, et al] ** Support packed structures and unions. (#181) Note this was a major internal change that may lead to some instability. *** Support tri0 and tri1. (#462) [Alex Solomatnikov] *** Support nmos and pmos. (#488) [Alex Solomatnikov] *** Add INITIALDLY warning on initial assignments. (#478) [Alex Solomatnikov] *** Add PINMISSING and PINNOCONNECT lint checks. *** Add --converge-limit option. *** Fix generate operators not short circuiting. (#413) [by Jeremy Bennett] *** Fix parameters not supported in constant functions. (#474) [Alex Solomatnikov] **** Fix duplicate warnings/errors. (#516) [Alex Solomatnikov] **** Fix signed extending biops with WIDTH warning off. (#511) [Junji Hashimoto] **** Fix ITOD internal error on real conversions. (#491) [Alex Solomatnikov] **** Fix input and real loosing real data type. (#501) [Alex Solomatnikov] **** Fix imports causing symbol table error. (#490) [Alex Solomatnikov] **** Fix newlines in radix values. (#507) [Walter Lavino] **** Fix loop error message to report line. (#513) [Jeremy Bennett] **** Fix false UNUSED warning on file system calls. **** Fix GCC 4.7.0 compile warnings. (#530) [Jeremy Bennett] **** Fix svdpi.h compile error on Apple OS. **** Fix compile error under git submodules. (#534) [Aurelien Francillon] * Verilator 3.833 2012-04-15 *** Support += and -= in standard for loops. (#463) [Alex Solomatnikov] *** Fix processing unused parametrized modules. (#469) (#470) [Alex Solomatnikov] **** Add SELRANGE as warning instead of error. (#477) [Alex Solomatnikov] **** Add readme.pdf and internal.pdf and doxygen. (#483) [by Jeremy Bennett] **** Fix change detections on arrays. (#364) [John Stevenson, Alex Solomatnikov] **** Fix signed array warning. (#456) [Alex Solomatnikov] **** Fix genvar and begin under generate. (#461) [Alex Solomatnikov] **** Fix real constant parameter functions. (#475) [Alex Solomatnikov] **** Fix and document --gdb option. (#454) [Jeremy Bennett] **** Fix OpenSolaris compile error. [Sanjay Singh] * Verilator 3.832 2012-03-07 *** Fix memory delayed assignments from multiple clock domains. [Andrew Ling] *** Support arrayed SystemC I/O pins. [Christophe Joly] *** Report MULTIDRIVEN on memories set in multiple clock domains. *** Report ENDLABEL on mismatching end labels. (#450) [Iztok Jeras] **** Fix expansion of back-slashed escaped macros. (#441) [Alberto Del Rio] **** Fix inheriting real and signed type across untyped parameters. **** Fix core dump with over 100 deep UNOPTFLAT. (#432) [Joe Eiler] **** Fix false command not found warning in makefiles. [Ruben Diez] **** Fix hang when functions inside begin block. [David Welch] **** Fix hang on recursive substitution `defines. (#443) [Alex Solomatnikov] * Verilator 3.831 2012-01-20 ** Support SystemC 2.3.0 prerelease. This requires setting the new SYSTEMC_INCLUDE and SYSTEMC_LIBDIR variables in place of now deprecated SYSTEMC and SYSTEMC_ARCH. [Iztok Jeras] **** Suppress VARHIDDEN on dpi import arguments. [Ruben Diez] **** Support "generate for (genvar i=0; ...". [David Kravitz] **** Fix dpi exports with > 32 bit but < 64 bit args. (#423) [Chandan Egbert] **** Fix array of instantiations with sub-range output. (#414) [Jeremy Bennett] **** Fix BLKSEQ warnings on variables declared inside always. [Ruben Diez] * Verilator 3.830 2011-11-27 ** With "--language VAMS" support a touch of Verilog AMS. [Holger Waechtler] *** Add sc_bv attribute to force bit vectors. (#402) [by Stefan Wallentowitz] **** Search for user -y paths before default current directory. [Ruben Diez] **** Support constants in sensitivity lists. (#412) [Jeremy Bennett] **** Support $system. [Ruben Diez] **** Support $sscanf with %g. [Holger Waechtler] **** Indicate 'exiting due to errors' if errors, not warnings. [Ruben Diez] **** Fix bad result with if-else-return optimization. (#420) [Alex Solomatnikov] **** Fix reporting not found modules if generate-off. (#403) [Jeremy Bennett] **** Fix $display with %d following %g. [Holger Waechtler] * Verilator 3.824 2011-10-25 *** Fix "always @ (* )". (#403) (#404) [Walter Lavino] *** Add ASSIGNIN as suppressable error. [Jeremy Bennett] **** Fix 3.823 constructor core dump on Debian. (#401) [Ahmed El-Mahmoudy] * Verilator 3.823 2011-10-20 *** Support $ceil, $floor, etc. [Alex Solomatnikov] *** Add configure options for cc warnings and extended tests. [Ruben Diez] *** Add -Wall reporting ASSIGNDLY on assignment delays. [Ruben Diez] *** Fix UNDRIVEN warnings inside DPI import functions. [Ruben Diez] *** Fix --help output to go to stderr, not stdout. (#397) [Ruben Diez] **** Fix DPI import output of 64 bits. (#398) [Mike Denio] **** Fix DPI import false BLKSEQ warnings. [Alex Solomatnikov] **** Fix MSVC compile warning with trunc/round. (#394) [Amir Gonnen] **** Fix autoconf and Makefile warnings. (#396) [Ruben Diez] * Verilator 3.821 2011-09-14 **** Fix PowerPC runtime error. (#288) [Ahmed El-Mahmoudy] **** Fix internal error on integer casts. (#374) [Chandan Egbert] * Verilator 3.820 2011-07-28 ** Support 'real' numbers and related functions. *** Support 'const' variables in limited cases; similar to enums. [Alex Solomatnikov] *** Support disable for loop escapes. *** Support $fopen and I/O with integer instead of `verilator_file_descriptor. *** Support coverage in -cc and -sc output modes. [John Li] Note this requires SystemPerl 1.338 or newer. **** Fix vpi_register_cb using bad s_cb_data. (#370) [by Thomas Watts] **** Fix $display missing leading zeros in %0d. (#367) [Alex Solomatnikov] **** Use 'vluint64_t' for SystemC instead of (same sized) 'uint64' for MSVC++. * Verilator 3.813 2011-06-28 *** Support bit vectors > 64 bits wide in DPI import and exports. *** Fix out of memory on slice syntax error. (#354) [Alex Solomatnikov] **** Fix error on enum references to other packages. (#339) [Alex Solomatnikov] **** Fix DPI undeclared svBitVecVal compile error. (#346) [Chandan Egbert] **** Fix DPI bit vector compile errors. (#347) (#359) [Chandan Egbert] **** Fix CDCRSTLOGIC report showing endpoint flops without resets. **** Fix compiler warnings on SPARC. (#288) [Ahmed El-Mahmoudy] * Verilator 3.812 2011-04-06 *** Add --trace-max-width and --trace-max-array. (#319) [Alex Solomatnikov] *** Add --Wno-fatal to turn off abort on warnings. [by Stefan Wallentowitz] **** Support ${...} and $(...) env vars in .vc files. [by Stefan Wallentowitz] **** Support $bits(data_type). (#327) [Alex Solomatnikov] **** Support loop unrolling on width mismatches. (#333) [Joe Eiler] **** Support simple cast operators. (#335) [Alex Solomatnikov] **** Accelerate bit-selected inversions. **** Add error on circular parameter definitions. (#329) [Alex Solomatnikov] **** Fix concatenates and vectored bufif1. (#326) [Iztok Jeras] * Verilator 3.811 2011-02-14 **** Report errors on duplicated or empty pins. (#321) [Christian Leber] **** Report error on function call output tied to constant. [Bernard Deadman] **** Throw UNUSED/UNDRIVEN only once per net in a parametrized module. **** Fix internal error on functions called as SV tasks. [Bernard Deadman] **** Fix internal error on non-inlined inout pins. [Jeff Winston] **** Fix false BLKSEQ on non-unrolled for loop indexes. [Jeff Winston] **** Fix block comment not separating identifiers. (#311) [Gene Sullivan] **** Fix warnings to point to lowest net usage, not upper level ports. **** Fix error on constants connected to outputs. (#323) [Christian Leber] * Verilator 3.810 2011-01-03 ** Add limited support for VPI access to public signals, see docs. *** Add -F option to read relative option files. (#297) [Neil Hamilton] *** Support ++,--,+= etc as standalone statements. [Alex Solomatnikov] **** When running with VERILATOR_ROOT, optionally find binaries under bin. **** Suppress WIDTH warnings when adding/subtracting 1'b1. ** Add -Wall, -Wwarn-style, -Wno-style to enable code style warnings that have been added to this release, and disabled by default: *** With --Wall, add BLKSEQ warning on blocking assignments in seq blocks. *** With --Wall, add DECLFILENAME warning on modules not matching filename. *** With --Wall, add DEFPARAM warning on deprecated defparam statements. *** With --Wall, add IFDEPTH warning on deep if statements. *** With --Wall, add INCABSPATH warning on `include with absolute paths. *** With --Wall, add SYNCASYNCNET warning on mixed sync/async reset nets. *** With --Wall, add UNDRIVEN warning on undriven nets. *** With --Wall, add UNUSED warning on unused nets. *** The VARHIDDEN warning is now disabled by default, use -Wall to enable. * Verilator 3.805 2010-11-02 **** Add warning when directory contains spaces. (#1705) [Salman Sheikh] **** Fix wrong filename on include file errors. (#289) [Brad Parker] **** Fix segfault on SystemVerilog "output wire foo=0". (#291) [Joshua Wise] **** Fix DPI export name not found. (#1703) [Terry Chen] * Verilator 3.804 2010-09-20 *** Support tracing/coverage of underscore signals. (#280) [by Jason McMullan] **** Fix preprocessor `` of existing base define. (#283) [Usha Priyadharshini] **** Increase define recursions before error. [Paul Liu] **** On core dump, print debug suggestions. * Verilator 3.803 2010-07-10 *** Fix preprocessor preservation of newlines across macro substitutions. **** Fix preprocessor stringification of nested macros. **** Fix some constant parameter functions causing crash. (#253) [Nick Bowler] **** Fix do {...} while() not requiring final semicolon. * Verilator 3.802 2010-05-01 *** Support runtime access to public signal names. *** Add /*verilator public_flat_rw*/ for timing-specific public access. *** Fix word size to match uint64_t on -m64 systems. (#238) [Joe Eiler] **** Improve error handling on slices of arrays. (#226) [by Byron Bradley] **** Report errors when extra underscores used in meta-comments. **** Fix bit reductions on multi-packed dimensions. (#227) [by Byron Bradley] **** Fix removing $fscanf if assigned to unused var. (#248) [Ashutosh Das] **** Fix "make install" with configure outside srcdir. [Stefan Wallentowitz] **** Fix loop unroller out of memory; change --unroll-stmts. [Ashutosh Das] **** Fix trace files with empty modules crashing some viewers. **** Fix parsing single files > 2GB. [Jeffrey Short] **** Fix installing data files as non-executable. (#168) [by Ahmed El-Mahmoudy] * Verilator 3.801 2010-03-17 *** Support "break", "continue", "return". *** Support "`default_nettype none|wire". [Dominic Plunkett] **** Skip SystemC tests if not installed. [Iztok Jeras] **** Fix clock-gates with non-AND complex logic. (#220) [Ashutosh Das] **** Fix flushing VCD buffers on $stop. [Ashutosh Das] **** Fix Mac OS-X compile issues. (#217) [Joshua Wise, Trevor Williams] **** Fix make uninstall. (#216) [Iztok Jeras] **** Fix parametrized defines with empty arguments. * Verilator 3.800 2010-02-07 Application visible changes: ** SystemPerl is no longer required for tracing. Applications must use VerilatedVcdC class in place of SpTraceVcdC. ** SystemVerilog 1800-2009 is now the default language. Thus "global" etc are now keywords. See the --language option. New features: ** Support SystemVerilog types "byte", "chandle", "int", "longint", "shortint", "time", "var" and "void" in variables and functions. ** Support "program", "package", "import" and $unit. ** Support typedef and enum. [by Donal Casey] ** Support direct programming interface (DPI) "import" and "export". Includes an extension to map user $system PLI calls to the DPI. *** Support assignments of multidimensional slices. (#170) [by Byron Bradley] *** Support multidimensional inputs/outputs. (#171) [by Byron Bradley] *** Support "reg [1:0][1:0][1:0]" and "reg x [3][2]". (#176) [Byron Bradley] *** Support declarations in loop initializers. (#172) [by Byron Bradley] *** Support $test$plusargs and $value$plusargs, but see the docs! *** Support $sformat and $swrite. *** Support 1800-2009 define defaults and `undefineall. *** Add -CFLAGS, -LDFLAGS, .a, .o, and .so options. *** Speed compiles by avoiding including the STL iostream header. Application programs may need to include it themselves to avoid errors. *** Add experimental clock domain crossing checks. *** Add experimental --pipe-filter to filter all Verilog input. *** Add experimental config files to filter warnings outside of the source. *** Add VARHIDDEN warning when signal name hides module name. **** Support optional cell parenthesis. (#179) [by Byron Bradley] **** Support for loop i++, ++i, i--, --i. (#175) [by Byron Bradley] **** Support 1800-2009 /*comments*/ in define values. **** Add Makefile VM_GLOBAL_FAST, listing objects needed to link executables. **** Add --bbox-unsup option to black-box unsupported UDP tables. **** Add -Wno-MODDUP option to allow duplicate modules. Bug fixes: **** Fix implicit variable issues. (#196) (#201) [Byron Bradley] **** Fix 'for' variable typing. (#205) [by Byron Bradley] **** Fix tracing with --pins-bv 1. (#195) [Michael S] **** Fix MSVC++ 2008 compile issues. (#209) [Amir Gonnen] **** Fix MinGW compilation. (#184) (#214) [by Shankar Giri, Amir Gonnen] **** Fix Cygwin 1.7.x compiler error with uint32_t. (#204) [Ivan Djordjevic] **** Fix `define argument mis-replacing system task of same name. (#191) **** Fix Verilator core dump on wide integer divides. (#178) [Byron Bradley] **** Fix lint_off/lint_on meta comments on same line as warning. * Verilator 3.720 2009-10-26 ** Support little endian bit vectors ("reg [0:2] x;"). ** Support division and modulus of > 64 bit vectors. [Gary Thomas] *** Fix writing to out-of-bounds arrays writing element 0. **** Fix core dump with SystemVerilog var declarations under unnamed begins. **** Fix VCD files showing internal flattened hierarchy, broke in 3.714. **** Fix cell port connection to unsized integer causing false width warning. **** Fix erroring on strings with backslashed newlines. (#168) [Pete Nixon] * Verilator 3.714 2009-09-18 ** Add --bbox-sys option to blackbox $system calls. ** Support generate for var++, var--, ++var, --var. *** Improved warning when "do" used as identifier. **** Don't require SYSTEMPERL_INCLUDE if SYSTEMPERL/src exists. [Gary Thomas] **** Fix deep defines causing flex scanner overflows. [Brad Dobbie] **** Fix preprocessing commas in deep parameterized macros. [Brad Dobbie] **** Fix tracing escaped dotted identifiers. (#107) **** Fix $display with uppercase %M. **** Fix --error-limit option being ignored. * Verilator 3.713 2009-08-04 ** Support constant function calls for parameters. [many!] *** Support SystemVerilog "logic". (#101) [by Alex Duller] *** Name SYMRSVDWORD error, and allow disabling it. (#103) [Gary Thomas] **** Fix escaped preprocessor identifiers. (#106) [Nimrod Gileadi] * Verilator 3.712 2009-07-14 ** Patching SystemC is no longer required to trace sc_bvs. *** Support zero-width constants in concatenations. [Jeff Winston] *** Add verilator --pins-uint8 option to use sc_in. *** Add verilator -V option, to show verbose version. *** On WIDTH warnings, show variable name causing error. [Jeff Winston] **** Add BLKLOOPINIT error code, and describe --unroll-count. [Jeff Winston] * Verilator 3.711 2009-06-23 **** Support decimal constants of arbitrary widths. [Mark Marshall] **** Fix error on case statement with all duplicate items. (#99) [Gary Thomas] **** Fix segfault on unrolling for's with bad inits. (#90) [Andreas Olofsson] **** Fix tristates causing "Assigned pin is neither...". [by Lane Brooks] **** Fix compiler errors under Fedora release candidate 11. [Chitlesh Goorah] * Verilator 3.710 2009-05-19 ** Verilator is now licensed under LGPL v3 and/or Artistic v2.0. *** `__FILE__ now expands to a string, per draft SystemVerilog 2010(ish). **** The front end parser has been re-factored to enable more SV parsing. Code should parse the same, but minor parsing bugs may pop up. **** Verilator_includer is no longer installed twice. (#48) [Lane Brooks] **** Fix escaped identifiers with '.' causing conflicts. (#83) [J Baxter] **** Fix define formal arguments that contain newlines. (#84) [David A] * Verilator 3.703 2009-05-02 *** Fix $clog2 calculation error with powers-of-2. (#81) [Patricio Kaplan] **** Fix error with tasks that have output first. (#78) [Andrea Foletto] **** Fix "cloning" error with -y/--top-module. (#76) [Dimitris Nalbantis] **** Fix segfault with error on bad --top-module. (#79) [Dimitris Nalbantis] **** Fix "redefining I" error with complex includes. [Duraid Madina] **** Fix GCC 4.3.2 compile warnings. * Verilator 3.702 2009-03-28 *** Add --pins-bv option to use sc_bv for all ports. [Brian Small] *** Add SYSTEMPERL_INCLUDE envvar to assist RPM builds. [Chitlesh Goorah] **** Report errors when duplicate labels are used. (#72) [Vasu Kandadi] **** Fix the SC_MODULE name() to not include __PVT__. [Bob Fredieu] * Verilator 3.701 2009-02-26 ** Support repeat and forever statements. [Jeremy Bennett] *** Add --debugi- option, for internal debugging. [Dennis Muhlestein] **** Fix compile issues with GCC 4.3. (#47) [Lane Brooks] **** Fix VL_RANDom to better randomize bits. [Art Stamness] **** Fix error messages to consistently go to stderr. [Jeremy Bennett] **** Fix left associativity for ?: operators. * Verilator 3.700 2009-01-08 ** Add limited support for tristate inouts. Written by Lane Brooks, under support by Ubixum Inc. This allows common pad ring and tristate-mux structures to be Verilated. See the documentation for more information on supported constructs. ** Add --coverage_toggle for toggle coverage analysis. Running coverage now requires SystemPerl 1.301 or newer. *** Add /*verilator coverage_on/_off */ to bracket coverage regions. *** Optimize two-level shift and and/or trees, +23% on one test. *** Support posedge of bit-selected signals. (#45) [Rodney Sinclair] *** Line coverage now aggregates by hierarchy automatically. Previously this would be done inside SystemPerl, which was slower. **** Minor performance improvements of Verilator compiler runtime. **** Coverage of each parametarized module is counted separately. [Bob Fredieu] **** Fix creating parameterized modules when no parameter values are changed. **** Fix certain generate-if cells causing "clone" error. [Stephane Laurent] **** Fix line coverage of public functions. [Soon Koh] **** Fix SystemC 2.2 deprecated warnings about sensitive() and sc_start(). **** Fix arrayed variables under function not compiling. (#44) [Ralf Karge] **** Fix --output-split-cfuncs to also split trace code. [Niranjan Prabhu] **** Fix 'bad select range' warning missing some cases. (#43) [Lane Brooks] **** Fix internal signal names containing control characters (broke in 3.680). **** Fix compile error on Ubuntu 8.10. [Christopher Boumenot] **** Fix internal error on "output x; reg x = y;". **** Fix wrong result for read of delayed FSM signal. (#46) [Rodney Sinclair] * Verilator 3.681 2008-11-12 *** Add SystemVerilog unique and priority case. **** Include Verilog file's directory name in coverage reports. **** Fix 'for' under 'generate-for' causing error. (#38) [Rafael Shirakawa] **** Fix coverage hierarchy being backwards with inlining. [Vasu Arasanipalai] **** Fix GCC 4.3 compile error. (#35) [Lane Brooks] **** Fix MSVC compile error. (#42) [John Stroebel] * Verilator 3.680 2008-10-08 ** Support negative bit indexes. [Stephane Laurent] Tracing negative indexes requires latest Verilog-Perl and SystemPerl. *** Suppress width warnings between constant strings and wider vectors. [Rodney Sinclair] **** Ignore SystemVerilog timeunit and timeprecision. **** Expand environment variables in -f input files. [Lawrence Butcher] **** Report error if port declaration is missing. (#32) [Guy-Armand Kamendje] **** Fix genvars causing link error when using --public. [Chris Candler] * Verilator 3.671 2008-09-19 ** SystemC uint64_t pins are now the default instead of sc_bv<64>. Use --no-pins64 for backward compatibility. *** Support SystemVerilog "cover property" statements. *** When warnings are disabled on signals that are flattened out, disable the warnings on the signal(s) that replace it. *** Add by-design and by-module subtotals to verilator_profcfunc. *** Fix extra evaluation of pure combo blocks in SystemC output. **** Add IMPERFECTSCH warning, disabled by default. **** Support coverage under SystemPerl 1.285 and newer. **** Fix stack overflow on large ? : trees. [John Sanguinetti] **** Support arbitrary characters in identifiers. [Stephane Laurent] * Verilator 3.670 2008-07-23 ** Add --x-assign=fast option, and make it the default. This chooses performance over reset debugging. See the manual. ** Add --autoflush, for flushing streams after $display. [Steve Tong] ** Add CASEWITHX lint warning and if disabled fix handling of casez with Xs. *** Add $feof, $fgetc, $fgets, $fflush, $fscanf, $sscanf. [Holger Waechtler] *** Add $stime. [Holger Waechtler] *** Add $random. *** Add --Wfuture-, for improving forward compatibility. **** Fix verilator_includer not being installed properly. [Holger Waechtler] **** Fix IMPURE errors due to X-assignment temporary variables. [Steve Tong] **** Fix "lvalue" errors with public functions. (#25) [CY Wang] **** Add WIDTH warning to $fopen etc file descriptors. **** Internal changes to how $displays get compiled and executed. * Verilator 3.665 2008-06-25 **** Ignore "// verilator" comments alone on endif lines. [Rodney Sinclair] **** "Make install" now installs verilator_includer and verilator_profcfunc. **** Fix tracing missing changes on undriven public wires. [Rodney Sinclair] **** Fix syntax error when "`include `defname" is ifdefed. [John Dickol] **** Fix error when macro call has commas in concatenate. [John Dickol] **** Fix compile errors under Fedora 9, GCC 4.3.0. [by Jeremy Bennett] **** Fix Makefile to find headers/libraries under prefix. [by Holger Waechtler] * Verilator 3.664 2008-05-08 **** Fix missing file in kit. * Verilator 3.663 2008-05-07 **** Add DESTDIR to Makefiles to assist RPM construction. [Gunter Dannoritzer] **** Fix compiler warnings under GCC 4.2.1. **** Fix preprocessor `else after series of `elsif. [Mark Nodine] **** Fix parametrized defines calling define with comma. [Joshua Wise] **** Fix comma separated list of primitives. [by Bryan Brady] * Verilator 3.662 2008-04-25 *** Add Verilog 2005 $clog2() function. This is useful in calculating bus-widths from parameters. *** Support /**/ comments in -f option files. [Stefan Thiede] **** Add error message when modules have duplicate names. [Stefan Thiede] **** Support defines terminated in EOF, though against spec. [Stefan Thiede] **** Support optional argument to $finish and $stop. [by Stefan Thiede] **** Support ranges on gate primitive instantiations. [Stefan Thiede] **** Ignore old standard(ish) Verilog-XL defines. [by Stefan Thiede] **** Fix "always @ ((a) or (b))" syntax error. [by Niranjan Prabhu] **** Fix "output reg name=expr;" syntax error. [Martin Scharrer] **** Fix multiple .v files being read in random order. [Stefan Thiede] **** Fix internal error when params get non-constants. [Johan Wouters] **** Fix bug introduced in 3.661 with parametrized defines. * Verilator 3.661 2008-04-04 *** The --enable-defenv configure option added in 3.660 is now the default. This hard-codes a default for VERILATOR_ROOT etc in the executables. *** Add --language option for supporting older code. [Stefan Thiede] *** Add --top-module option to select between multiple tops. [Stefan Thiede] *** Unsized concatenates now give WIDTHCONCAT warnings. [Jonathan Kimmitt] Previously they threw fatal errors, which in most cases is correct according to spec, but can be incorrect in presence of parameter values. **** Support functions with "input integer". [Johan Wouters] **** Ignore delays attached to gate UDPs. [Stefan Thiede] **** Fix SystemVerilog parameterized defines with `` expansion, and fix extra whitespace inserted on substitution. [Vladimir Matveyenko] **** Fix no-module include files on command line. [Stefan Thiede] **** Fix dropping of backslash quoted-quote at end of $display. **** Fix task output pin connected to non-variables. [Jonathan Kimmitt] **** Fix missing test_v in install datadir. [Holger Waechtler] **** Fix internal error after MSB < LSB error reported to user. [Stefan Thiede] * Verilator 3.660 2008-03-23 *** Add support for hard-coding VERILATOR_ROOT etc in the executables, to enable easier use of Verilator RPMs. [Gunter Dannoritzer] *** Allow multiple .v files on command line. [Stefan Thiede] *** Convert re-defining macro error to warning. [Stefan Thiede] *** Add --error-limit option. [Stefan Thiede] *** Allow __ in cell names by quoting them in C. [Stefan Thiede] **** Fix genvar to be signed, so "< 0" works properly. [Niranjan Prabhu] **** Fix assignments to inputs inside functions/tasks. [Patricio Kaplan] **** Fix definitions in main file.v, referenced in library. [Stefan Thiede] **** Fix undefined assigns to be implicit warnings. [Stefan Thiede] * Verilator 3.658 2008-02-25 **** Fix unistd compile error in 3.657. [Patricio Kaplan, Jonathan Kimmitt] * Verilator 3.657 2008-02-20 **** Fix assignments of {a,b,c} = {c,b,a}. [Jonathan Kimmitt] **** Fix Perl warning with --lint-only. [by Ding Xiaoliang] **** Avoid creating obj_dir with --lint-only. [Ding Xiaoliang] **** Fix parsing of always @(*). [Patricio Kaplan] * Verilator 3.656 2008-01-18 **** Wide VL_CONST_W_#X functions are now made automatically. [Bernard Deadman] In such cases, a new {prefix}__Inlines.h file will be built and included. **** Fixed sign error when extracting from signed memory. [Peter Debacker] **** Fixed tracing of SystemC w/o SystemPerl. [Bernard Deadman, Johan Wouters] * Verilator 3.655 2007-11-27 *** Support "#delay ;" with associated STMTDLY warning. **** Fixed generate for loops with constant zero conditions. [Rodney Sinclair] **** Fixed divide-by-zero errors in constant propagator. [Rodney Sinclair] **** Fixed wrong result with obscure signed-shift underneath a "? :". **** Fixed many internal memory leaks, and added leak detector. * Verilator 3.654 2007-10-18 **** Don't exit early if many warnings but no errors are found. [Stan Mayer] **** Fixed parsing module #(parameter x,y) declarations. [Oleg Rodionov] **** Fixed parsing system functions with empty parens. [Oleg Rodionov] * Verilator 3.653 2007-08-01 **** Support SystemVerilog ==? and !=? operators. **** Fixed SC_LIBS missing from generated makefiles. [Ding Xiaoliang] * Verilator 3.652 2007-06-21 **** Report as many warning types as possible before exiting. **** Support V2K portlists with "input a,b,...". [Mark Nodine] **** Support V2K function/task argument lists. **** Optimize constant $display arguments. **** Fixed Preprocessor dropping some `line directives. [Mark Nodine] * Verilator 3.651 2007-05-22 *** Added verilator_profcfunc utility. [Gene Weber] *** Treat modules within `celldefine and `endcelldefine as if in library. *** Support functions which return integers. [Mark Nodine] **** Warn if flex is not installed. [Ralf Karge] **** Ignore `protect and `endprotect. **** Allow empty case/endcase blocks. * Verilator 3.650 2007-04-20 ** Add --compiler msvc option. This is now required when Verilated code is to be run through MSVC++. This also enables fixing MSVC++ error C1061, blocks nested too deeply. [Ralf Karge] ** Add --lint-only option, to lint without creating other output. *** Add /*verilator lint_save*/ and /*verilator lint_restore*/ to allow friendly control over re-enabling lint messages. [Gerald Williams] *** Support SystemVerilog .name and .* interconnect. *** Support while and do-while loops. *** Use $(LINK) instead of $(CXX) for Makefile link rules. [Gerald Williams] *** Add USER_CPPFLAGS and USER_LDFLAGS to Makefiles. [Gerald Williams] **** Fixed compile errors under Windows MINGW compiler. [Gerald Williams] **** Fixed dotted bit reference to local memory. [Eugene Weber] **** Fixed 3.640 `verilog forcing IEEE 1364-1995 only. [David Hewson] * Verilator 3.640 2007-03-12 *** Support Verilog 2005 `begin_keywords and `end_keywords. *** Updated list of SystemVerilog keywords to correspond to IEEE 1800-2005. *** Add /*verilator public_flat*/. [Eugene Weber] **** Try all +libext's in the exact order given. [Michael Shinkarovsky] **** Fixed elimination of public signals assigned to constants. [Eugene Weber] **** Fixed internal error when public for loop has empty body. [David Addison] **** Fixed "Loops detected" assertion when model exceeds 4GB. [David Hewson] **** Fixed display %m names inside named blocks. * Verilator 3.633 2007-02-07 *** Add --trace-depth option for minimizing VCD file size. [Emerson Suguimoto] *** With VL_DEBUG, show wires causing convergence errors. [Mike Shinkarovsky] **** Fixed isolate_assignments when many signals per always. [Mike Shinkarovsky] **** Fixed isolate_assignments across task/func temporaries. [Mike Shinkarovsky] **** Fixed $display's with array select followed by wide AND. [David Hewson] * Verilator 3.632 2007-01-17 *** Add /*verilator isolate_assignments*/ attribute. [Mike Shinkarovsky] * Verilator 3.631 2007-01-02 ** Support standard NAME[#] for cells created by arraying or generate for. This replaces the non-standard name__# syntax used in earlier versions. **** Fixed again dotted references into generate cells. [David Hewson] Verilator no longer accepts duplicated variables inside unique generate blocks as this is illegal according to the specification. **** Fixed $readmem* with filenames < 8 characters. [Emerson Suguimoto] * Verilator 3.630 2006-12-19 ** Support $readmemb and $readmemh. [Eugene Weber, Arthur Kahlich] *** Fixed configure and compiling under Solaris. [Bob Farrell] *** When dotted signal lookup fails, help the user by showing known scopes. *** Reduce depth of priority encoded case statements. [Eugene Weber] **** Fixed dotted references inside generated cells. [David Hewson] **** Fixed missed split optimization points underneath other re-split blocks. * Verilator 3.623 2006-12-05 *** Add --output-split-cfuncs for accelerating GCC compile. [Eugene Weber] **** Fixed $signed mis-extending when input has a WIDTH violation. [Eugene Weber] **** Add M32 make variable to support -m32 compiles. [Eugene Weber] * Verilator 3.622 2006-10-17 Stable **** Fixed --skip-identical without --debug, broken in 3.621. [Andy Meier] * Verilator 3.621 2006-10-11 Beta ** Add /*verilator no_inline_task*/ to prevent over-expansion. [Eugene Weber] *** Public functions now allow > 64 bit arguments. **** Remove .vpp intermediate files when not under --debug. **** Fixed link error when using --exe with --trace. [Eugene Weber] **** Fixed mis-optimization of wide concats with constants. **** Fixed core dump on printing error when not under --debug. [Allan Cochrane] * Verilator 3.620 2006-10-04 Stable *** Support simple inout task ports. [Eugene Weber] *** Allow overriding Perl, Flex and Bison versions. [by Robert Farrell] *** Optimize variables set to constants within basic blocks for ~3%. **** Default make no longer makes the docs; if you edit the documentation. sources, run "make info" to get them. **** Optimize additional boolean identities (a|a = a, etc.) **** Fixed coredump when dotted cross-ref inside task call. [Eugene Weber] **** Fixed dotted variables in always sensitivity lists. [Allan Cochrane] * Verilator 3.610 2006-09-20 Stable *** Verilator now works under DJGPP (Pentium GCC). [John Stroebel] **** Add default define for VL_PRINTF. [John Stroebel] **** Removed coverage request variable; see Coverage limitations in docs. **** Fixed DOS carriage returns in multiline defines. [Ralf Karge] **** Fixed printf format warnings on 64-bit linux. * Verilator 3.602 2006-09-11 Stable **** Fixed function references under top inlined module. [David Hewson] * Verilator 3.601 2006-09-06 Beta *** Added --inhibit-sim flag for environments using old __Vm_inhibitSim. *** Added `systemc_dtor for destructor extensions. [Allan Cochrane] *** Added -MP to make phony dependencies, ala GCC's. *** Changed how internal functions are invoked to reduce aliasing. Useful when using GCC's -O2 or -fstrict-aliasing, to gain another ~4%. **** Fixed memory leak when destroying modules. [John Stroebel] **** Fixed coredump when unused modules have unused cells. [David Hewson] **** Fixed 3.600 internal error with arrayed instances. [David Hewson] **** Fixed 3.600 internal error with non-unrolled function loops. [David Hewson] **** Fixed $display %m name not matching Verilog name inside SystemC modules. **** Declare optimized lookup tables as 'static', to reduce D-Cache miss rate. * Verilator 3.600 2006-08-28 Beta ** Support dotted cross-hierarchy variable and task references. **** Lint for x's in generate case statements. **** Fixed line numbers being off by one when first file starts with newline. **** Fixed naming of generate for blocks to prevent non-inline name conflict. **** Fixed redundant statements remaining after table optimization. * Verilator 3.542 2006-08-11 Stable **** Fixed extraneous UNSIGNED warning when comparing genvars. [David Hewson] **** Fixed extra white space in $display %c. [by David Addison] **** vl_finish and vl_fatal now print via VL_PRINTF rather then cerr/cout. **** Add VL_CONST_W_24X macro. [Bernard Deadman] * Verilator 3.541 2006-07-05 Beta *** Fixed "// verilator lint_on" not re-enabling warnings. [David Hewson] *** Fixed 3.540's multiple memory assignments to same block. [David Hewson] **** Add warning on changeDetect to arrayed structures. [David Hewson] **** Fixed non-zero start number for arrayed instantiations. [Jae Hossell] **** Fixed GCC 4.0 header file warnings. * Verilator 3.540 2006-06-27 Beta **** Optimize combo assignments that are used only once, ~5-25% faster. **** Optimize delayed assignments to memories inside loops, ~0-5% faster. **** Fixed mis-width warning on bit selects of memories. [David Hewson] **** Fixed mis-width warning on dead generate-if branches. [Jae Hossell] * Verilator 3.533 2006-06-05 Stable *** Add PDF user manual, verilator.pdf. **** Fixed delayed bit-selected arrayed assignments. [David Hewson] **** Fixed execution path to Perl. [Shanshan Xu] **** Fixed Bison compile errors in verilog.y. [by Ben Jackson] * Verilator 3.531 2006-05-10 Stable *** Support $c routines which return 64 bit values. **** Fixed `include `DEFINE. **** Fixed Verilator core dump when have empty public function. [David.Hewson] * Verilator 3.530 2006-04-24 Stable ** $time is now 64 bits. The macro VL_TIME_I is now VL_TIME_Q, but calls the same sc_time_stamp() function to get the current time. * Verilator 3.523 2006-03-06 Stable **** Fixed error line numbers being off due to multi-line defines. [Mat Zeno] **** Fixed GCC sign extending (uint64_t)(a>>, $signed, $unsigned. [MANY!] ** Support multi-dimensional arrays. [Eugen Fekete] ** Add very limited support for the Property Specification Language (aka PSL or Sugar). The format and keywords are now very limited, but will grow with future releases. The --assert switch enables this feature. ** With --assert, generate assertions for synthesis parallel_case and full_case. **** Fixed generate if's with empty if/else blocks. [Mat Zeno] **** Fixed generate for cell instantiations with same name. [Mat Zeno] * Verilator 3.481 2005-10-12 Stable *** Add /*verilator tracing_on/off*/ for waveform control. **** Fixed split optimization reordering $display statements. * Verilator 3.480 2005-09-27 Beta ** Allow coverage of flattened modules, and multiple points per line. Coverage analysis requires SystemPerl 1.230 or newer. **** Add preprocessor changes to support meta-comments. **** Optimize sequential assignments of different bits of same bus; ~5% faster. **** Optimize away duplicate lookup tables. **** Optimize wide concatenates into individual words. [Ralf Karge] **** Optimize local variables from delayed array assignments. * Verilator 3.470 2005-09-06 Stable *** Optimize staging flops under reset blocks. *** Add '-Werror-...' to upgrade specific warnings to errors. **** Add GCC branch prediction hints on generated if statements. **** Fixed bad simulation when same function called twice in same expression. **** Fixed preprocessor substitution of quoted parameterized defines. * Verilator 3.464 2005-08-24 Stable *** Add `systemc_imp_header, for use when using --output-split. *** Add --stats option to dump design statistics. **** Fixed core dump with clock inversion optimizations. * Verilator 3.463 2005-08-05 Stable *** Fixed case defaults when not last statement in case list. [Wim Michiels] * Verilator 3.462 2005-08-03 Stable *** Fixed reordering of delayed assignments to same memory index. [Wim Michiels] **** Fixed compile error with Flex 2.5.1. [Jens Arm] **** Fixed multiply-instantiated public tasks generating non-compilable code. * Verilator 3.461 2005-07-28 Beta **** Fixed compile error with older versions of bison. [Jeff Dutton] * Verilator 3.460 2005-07-27 Beta ** Add -output-split option to enable faster parallel GCC compiles. To support --output-split, the makefiles now split VM_CLASSES into VM_CLASSES_FAST and VM_CLASSES_SLOW. This may require a change to local makefiles. ** Support -v argument to read library files. *** When issuing unoptimizable warning, show an example path. **** Fixed false warning when a clock is constant. **** Fixed X/Z in decimal numbers. [Wim Michiels] **** Fixed genvar statements in non-named generate blocks. **** Fixed core dump when missing newline in `define. [David van der bokke] **** Internal tree dumps now indicate edit number that changed the node. * Verilator 3.450 2005-07-12 ** $finish will no longer exit, but set Verilated::gotFinish(). This enables support for final statements, and for other cleanup code. If this is undesired, redefine the vl_user_finish routine. Top level loops should use Verilated::gotFinish() as a exit condition for their loop, and then call top->final(). To prevent a infinite loop, a double $finish will still exit; this may be removed in future releases. *** Add support for SystemVerilog keywords $bits, $countones, $isunknown, $onehot, $onehot0, always_comb, always_ff, always_latch, finish. **** Fixed "=== 1'bx" to always be false, instead of random. * Verilator 3.440 2005-06-28 Stable ** Add Verilog 2001 generate for/if/case statements. * Verilator 3.431 2005-06-24 Stable *** Fixed selection bugs introduced in 3.430 beta. * Verilator 3.430 2005-06-22 Beta ** Add Verilog 2001 variable part selects [n+:m] and [n-:m]. [Wim Michiels] * Verilator 3.422 2005-06-10 Stable *** Added Verilog 2001 power (**) operator. [Danny Ding] **** Fixed crash and added error message when assigning to inputs. [Ralf Karge] **** Fixed tracing of modules with public functions. * Verilator 3.421 2005-06-02 Beta **** Fixed error about reserved word on non-public signals. **** Fixed missing initialization compile errors in 3.420 beta. [Ralf Karge] * Verilator 3.420 2005-06-02 Beta *** Fixed case defaults when not last statement in case list. [Ralf Karge] **** Added error message when multiple defaults in case statement. **** Fixed crash when wire self-assigns x=x. ** Performance improvements worth ~20% ** Added -x-assign options; ~5% faster if use -x-assign=0. **** Optimize shifts out of conditionals and if statements. **** Optimize local 'short' wires. **** Fixed gate optimization with top-flattened modules. [Mahesh Kumashikar] * Verilator 3.411 2005-05-30 Stable **** Fixed compile error in GCC 2.96. [Jeff Dutton] * Verilator 3.410 2005-05-25 Beta ** Allow functions and tasks to be declared public. They will become public C++ functions, with appropriate C++ types. This allows users to make public accessor functions/tasks, instead of having to use public variables and `systemc_header hacks. *** Skip producing output files if all inputs are identical This uses timestamps, similar to make. Disable with --no-skip-identical. **** Improved compile performance with large case statements. **** Fixed internal error in V3Table. [Jeff Dutton] **** Fixed compile error in GCC 2.96, and with SystemC 1.2. [Jeff Dutton] * Verilator 3.400 2005-04-29 Beta ** Internal changes to support future clocking features. ** Verilog-Perl and SystemPerl are no longer required for C++ or SystemC output. If you want tracing or coverage analysis, they are still needed. *** Added --sc to create pure SystemC output not requiring SystemPerl. *** Added --pins64 to create 64 bit SystemC outputs instead of sc_bv<64>. *** The --exe flag is now required to produce executables inside the makefile. This was previously the case any time .cpp files were passed on the command line. *** Added -O3 and --inline-mult for performance tuning. [Ralf Karge] One experiment regained 5% performance, at a cost of 300% in compile time. *** Improved performance of large case/always statements with low fanin by converting to internal lookup tables (ROMs). *** Initialize SystemC port names. [S Shuba] **** Added Doxygen comments to Verilated includes. **** Fixed -cc pins 8 bits wide and less to be uint8_t instead of uint16_t. **** Fixed crash when Mdir has same name as .v file. [Gernot Koch] **** Fixed crash with size mismatches on case items. [Gernot Koch] * Verilator 3.340 2005-02-18 Stable *** Report misconnected pins across all modules, instead of just first error. **** Fixed over-active inlining, resulting in compile slowness. **** Improved large netlist compile times. **** Added additional internal assertions. * Verilator 3.332 2005-01-27 *** Added -E preprocess only flag, similar to GCC. *** Added CMPCONSTLR when comparison is constant due to > or < with all ones. **** Fixed loss of first -f file argument, introduced in 3.331. * Verilator 3.331 2005-01-18 ** The Verilog::Perl preprocessor is now C++ code inside of Verilator. This improves performance, makes compilation easier, and enables some future features. *** Support arrays of instantiations (non-primitives only). [Wim Michiels] **** Fixed unlinked error with defparam. [Shawn Wang] * Verilator 3.320 2004-12-10 ** NEWS is now renamed Changes, to support CPAN indexing. *** If Verilator is passed a C file, create a makefile link rule. This saves several user steps when compiling small projects. *** Added new COMBDLY warning in place of fatal error. [Shawn Wang] *** Fixed mis-simulation with wide-arrays under bit selects. [Ralf Karge] **** Added NC Verilog as alternative to VCS for reference tests. **** Support implicit wire declarations on input-only signals. (Dangerous, as leads to wires without drivers, but allowed by spec.) **** Fixed compile warnings on Suse 9.1 * Verilator 3.311 2004-11-29 ** Support implicit wire declarations (as a warning). [Shawn Wang] **** Fixed over-shift difference in Verilog vs C++. [Ralf Karge] * Verilator 3.310 2004-11-15 ** Support defparam. ** Support gate primitives: buf, not, and, nand, or, nor, xor, xnor. *** Ignore all specify blocks. * Verilator 3.302 2004-11-12 *** Support NAND and NOR operators. *** Better warnings when port widths don't match. **** Fixed internal error due to some port width mismatches. [Ralf Karge] **** Fixed WIDTH warnings on modules that are only used parameterized, not in 'default' state. **** Fixed selection of SystemC library on cygwin systems. [Shawn Wang] **** Fixed runtime bit-selection of parameter constants. * Verilator 3.301 2004-11-04 **** Fixed 64 bit [31:0] = {#{}} mis-simulation. [Ralf Karge] **** Fixed shifts greater then word width mis-simulation. [Ralf Karge] **** Work around GCC 2.96 negation bug. * Verilator 3.300 2004-10-21 ** New backend that eliminates most VL_ macros. Improves performance 20%-50%, depending on frequency of use of signals over 64 bits. GCC compile times with -O2 shrink by a factor of 10. **** Fixed "setting unsigned int from signed value" warning. * Verilator 3.271 2004-10-21 **** Fixed "loops detected" error with some negedge clocks. **** Cleaned up some output code spacing issues. * Verilator 3.270 2004-10-15 *** Support Verilog 2001 parameters in module headers. [Ralf Karge] **** Suppress numeric fault when dividing by zero. **** Faster code to support compilers not inlining all Verilated functions. * Verilator 3.260 2004-10-07 ** Support Verilog 2001 named parameter instantiation. [Ralf Karge] **** Return 1's when one bit wide extract indexes outside array bounds. **** Fixed compile warnings on 64-bit operating systems. **** Fixed incorrect dependency in .d file when setting VERILATOR_BIN. * Verilator 3.251 2004-09-09 **** Fixed parenthesis overflow in Microsoft Visual C++ [Renga Sundararajan] * Verilator 3.250 2004-08-30 ** Support Microsoft Visual C++ [Renga Sundararajan] *** SystemPerl 1.161+ is required. * Verilator 3.241 2004-08-17 ** Support ,'s to separate multiple assignments. [Paul Nitza] **** Fixed shift sign extension problem using non-GCC compilers. * Verilator 3.240 2004-08-13 ** Verilator now uses 64 bit math where appropriate. Inputs and outputs of 33-64 bits wide to the C++ Verilated model must now be uint64_t's; SystemC has not changed, they will remain sc_bv's. This increases performance by ~ 9% on x86 machines, varying with how frequently 33-64 bit signals occur. Signals 9-16 bits wide are now stored as 16 bit shorts instead of longs, this aids cache packing. **** Fixed SystemC compile error with feedthrus. [Paul Nitza] **** Fixed concat value error introduced in 3.230. * Verilator 3.230 2004-08-10 *** Added coverage output to test_sp example, SystemPerl 1.160+ is required. **** Fixed time 0 value of signals. [Hans Van Antwerpen] Earlier versions would not evaluate some combinatorial signals until posedge/negedge blocks had been activated. **** Fixed wide constant inputs to public submodules [Hans Van Antwerpen] **** Fixed wide signal width extension bug. Only applies when width mismatch warnings were overridden. * Verilator 3.220 2004-06-22 ** Many waveform tracing changes: *** Tracing is now supported on C++ standalone simulations. [John Brownlee] *** When tracing, SystemPerl 1.150 or newer is required. *** When tracing, Verilator must be called with the --trace switch. **** Added SystemPerl example to documentation. [John Brownlee] **** Various Cygwin compilation fixes. [John Brownlee] * Verilator 3.210 2004-04-01 ** Compiler optimization switches have changed See the BENCHMARKING section of the documentation. *** With Verilog-Perl 2.3 or newer, Verilator supports SystemVerilog preprocessor extensions. *** Added localparam. [Thomas Hawkins] *** Added warnings for SystemVerilog reserved words. * Verilator 3.203 2004-03-10 *** Notes and repairs for Solaris. [Fred Ma] * Verilator 3.202 2004-01-27 ** The beta version is now the primary release. See below for many changes. If you have many problems, you may wish to try release 3.125. *** Verilated::traceEverOn(true) must be called at time 0 if you will ever turn on tracing (waveform dumping) of signals. Future versions will need this switch to disable trace incompatible optimizations. **** Fixed several tracing bugs **** Added optimizations for common replication operations. * Verilator 3.201-beta 2003-12-10 ** BETA VERSION, USE 3.124 for stable release! ** Version 3.2XX includes a all new back-end. This includes automatic inlining, flattening of signals between hierarchy, and complete ordering of statements. This results in 60-300% execution speedups, though less pretty C++ output. Even better results are possible using GCC 3.2.2 (part of Redhat 9.1), as GCC has fixed some optimization problems which Verilator exposes. If you are using `systemc_ctor, beware pointers to submodules are now initialized after the constructor is called for a module, to avoid segfaults, move statements that reference subcells into initial statements. *** C++ Constructor that creates a verilog module may take a char* name. This name will be used to prefix any $display %m arguments, so users may distinguish between multiple Verilated modules in a single executable. * Verilator 3.125 2004-01-27 **** Optimization of bit replications * Verilator 3.124 2003-12-05 *** A optimized executable will be made by default, in addition to a debug executable. Invoking Verilator with --debug will pick the debug version. **** Many minor invisible changes to support the next version. * Verilator 3.123 2003-11-10 **** Wide bus performance enhancements. **** Fixed function call bug when width warning suppressed. [Leon Wildman] **** Fixed __DOT__ compile problem with funcs in last revision. [Leon Wildman] * Verilator 3.122 2003-10-29 *** Modules which are accessed from external code now must be marked with /*verilator public_module*/ unless they already contain public signals. To enforce this, private cell names now have a string prepended. **** Fixed replicated function calls in one statement. [Robert A. Clark] **** Fixed function call bug when width warning suppressed. [Leon Wildman] * Verilator 3.121 2003-09-29 *** Support multiplication over 32 bits. [Chris Boumenot] Also improved speed of addition and subtraction over 32 bits. *** Detect bit selection out of range errors. *** Detect integer width errors. **** Fixed width problems on function arguments. [Robert A. Clark] * Verilator 3.120 2003-09-24 *** $finish now exits the model (via vl_finish function). *** Support inputs/outputs in tasks. *** Support V2K "integer int = {INITIAL_VALUE};" *** Ignore floating point delay values. [Robert A. Clark] **** Ignore `celldefine, `endcelldefine, etc. [Robert A. Clark] **** New optimizations on reduction operators. **** Fixed converting "\ooo" into octal values. **** Fixed $display("%x"); * Verilator 3.112 2003-09-16 **** Fixed functions in continuous assignments. [Robert A. Clark] **** Fixed inlining of modules with 2-level deep outputs. * Verilator 3.111 2003-09-15 **** Fixed declaration of functions before using that module. [Robert A. Clark] **** Fixed module inlining bug with outputs. * Verilator 3.110 2003-09-12 ** Support Verilog 2001 style input/output declarations. [Robert A. Clark] *** Allow local vars in headers of function/tasks. [Leon Wildman] * Verilator 3.109 2003-08-28 ** Added support for local variables in named begin blocks. [Leon Wildman] * Verilator 3.108 2003-08-11 ** Added support for functions. *** Signals 8 bits and shorter are now stored as chars instead of uint32_t's. This improves Dcache packing and improves performance by ~7%. **** $display now usually results in a single VL_PRINT rather then many. **** Many optimizations involving conditionals (?:) * Verilator 3.107 2003-07-15 *** --private and --l2name are now the default, as this enables additional optimizations. Use --noprivate or --nol2name to get the older behavior. *** Now support $display of binary and wide format data. *** Added detection of incomplete case statements, and added related optimizations worth ~4%. **** Work around flex bug in Redhat 8.0. [Eugene Weber] **** Added some additional C++ reserved words. **** Additional constant optimizations, ~5% speed improvement. * Verilator 3.106 2003-06-17 ** $c can now take multiple expressions as arguments. For example $c("foo","bar(",32+1,");") will insert "foobar(33);" This makes it easier to pass the values of signals. ** Several changes to support future versions that may have signal-eliminating optimizations. Users should try to use these switch on designs, they will become the default in later versions. *** Added --private switch and /*verilator public*/ metacomment. This renames all signals so that compile errors will result if any signals referenced by C++ code are missing a /*verilator public*/ metacomment. *** With --l2name, the second level cell C++ cell is now named "v". Previously it was named based on the name of the verilog code. This means to get to signals, scope to "{topcell} ->v ->{mysignal}" instead of "{topcell} ->{verilogmod}. {mysignal}". This allows different modules to be substituted for the cell without requiring source changes. **** Several cleanups for Redhat 8.0. * Verilator 3.105 2003-05-08 **** Fixed more GCC 3.2 errors. [David Black] * Verilator 3.104 2003-04-30 *** Indicate direction of ports with VL_IN and VL_OUT. *** Allow $c32, etc, to specify width of the $c statement for VCS. **** Fixed false "indent underflow" error inside `systemc_ctor sections. **** Fixed missing ordering optimizations when outputs also used internally. *** Numerous performance improvements, worth about 25% **** Assign constant cell pins in initial blocks rather then every cycle. **** Promote subcell's combo logic to sequential evaluation when possible. **** Fixed GCC 3.2 compile errors. [Narayan Bhagavatula] * Verilator 3.103 2003-01-28 **** Fixed missing model evaluation when clock generated several levels of hierarchy across from where it is used as a clock. [Richard Myers] **** Fixed sign-extension bug introduced in 3.102. * Verilator 3.102 2003-01-24 **** Fixed sign-extension of X/Z's ("32'hx") * Verilator 3.101 2003-01-13 **** Fixed 'parameter FOO=#'bXXXX' [Richard Myers] **** Allow spaces inside numbers ("32'h 1234") [Sam Gladstone] * Verilator 3.100 2002-12-23 ** Support for simple tasks w/o vars or I/O. [Richard Myers] **** Ignore DOS carriage returns in Linux files. [Richard Myers] * Verilator 3.012 2002-12-18 **** Fixed parsing bug with casex statements containing case items with bit extracts of parameters. [Richard Myers] **** Fixed bug which could cause writes of non-power-of-2 sized arrays to corrupt memory beyond the size of the array. [Dan Lussier] **** Fixed bug which did not detect UNOPT problems caused by submodules. See the description in the verilator man page. [John Deroo] **** Fixed compile with threaded Perl. [Ami Keren] * Verilator 3.010 2002-11-03 *** Support SystemC 2.0.1. SystemPerl version 1.130 or newer is required. **** Fixed bug with inlined modules under other inlined modules. [Scott Bleiweiss] * Verilator 3.005 2002-10-21 **** Fixed X's in case (not casex/z) to constant propagate correctly. **** Fixed missing include. [Kurachi] * Verilator 3.004 2002-10-10 *** Added /* verilator module_inline */ and associated optimizations. *** Allow /* verilator coverage_block_off */ in place of `coverage_block_off. This prevents problems with Emacs AUTORESET. [Ray Strouble] **** Fixed `coverage_block_off also disabling subsequent blocks. **** Fixed unrolling of loops with multiple simple statements. **** Fixed compile warnings on newer GCC. [Kurachi] **** Additional concatenation optimizations. * Verilator 3.003 2002-09-13 *** Now compiles on Windows 2000 with Cygwin. **** Fixed bug with pin assignments to wide memories. **** Optimize wire assignments to constants. * Verilator 3.002 2002-08-19 ** First public release of version 3. * Verilator 3.000 2002-08-03 ** All new code base. Many changes too numerous to mention. *** Approximately 4 times faster then Verilator 2. *** Supports initial statements *** Supports correct blocking/nonblocking assignments *** Supports `defines across multiple modules *** Optimizes call ordering, constant propagation, and dead code elimination. * Verilator 2.1.8 2002-04-03 ** All applications must now link against include/verilated.cpp *** Paths specified to verilator_make should be absolute, or be formed to allow for execution in the object directory (prepend ../ to each path.) This allows relative filenames for makes which hash and cache dependencies. **** Added warning when parameter constants are too large. [John Deroo] **** Added warning when x/?'s used in non-casez statements. **** Added warning when blocking assignments used in posedge blocks. [Dan Lussier] **** Split evaluation function into clocked and non-clocked, 20% perf gain. * Verilator 2.1.5 2001-12-01 ** Added coverage analysis. In conjunction with SystemC provide line coverage reports, without SystemC, provide a hook to user written accumulation function. See --coverage option of verilator_make. *** Relaxed multiply range checking *** Support for constants up to 128 bits *** Randomize values used when assigning to X's. **** Added -guard option of internal testing. **** Changed indentation in emitted code to be automatically generated. **** Fixed corruption of assignments of signal over 32 bits with non-0 lsb. * Verilator 2.1.4 2001-11-16 ** Added $c("c_commands();"); for embedding arbitrary C code in Verilog. * Verilator 2.1.3 2001-11-03 ** Support for parameters. * Verilator 2.1.2 2001-10-25 ** Verilog Errors now reference the .v file rather then the .vpp file. *** Support strings in assignments: reg [31:0] foo = "STRG"; *** Support %m in format strings. Ripped out old $info support, use Verilog-Perl's vpm program instead. *** Convert $stop to call of v_stop() which user can define. **** Fixed bug where a==b==c would have wrong precedence rule. **** Fixed bug where XNOR on odd-bit-widths (~^ or ^~) had bad value. * Verilator 2.1.1 2001-05-17 ** New test_sp directory for System-Perl (SystemC) top level instantiation of the Verilated code, lower modules are still C++ code. (Experimental). ** New test_spp directory for Pure System-Perl (SystemC) where every module is true SystemC code. (Experimental) *** Input ports are now loaded by pointer reference into the sub-cell. This is faster on I-386 machines, as the stack must be used when there are a large number of parameters. Also, this simplifies debugging as the value of input ports exists for tracing. **** Many code cleanups towards standard C++ style conventions. * Verilator 2.1.0 2001-05-08 **** Many code cleanups towards standard C++ style conventions. * {Version history lost} * Verilator 1.8 1996-07-08 ** [Versions 0 to 1.8 were by Paul Wasson] **** Fixed single bit in concat from instance output incorrect offset bug. * Verilator 1.7 1996-05-20 **** Mask unused bits of DONTCAREs. * Verilator 1.6 1996-05-13 *** Added fasttrace script * Verilator 1.5 1996-01-09 *** Pass structure pointer into translated code, so multiple instances can use same functions. **** Fixed static value concat on casex items. * Verilator 1.1 1995-03-30 *** Bug fixes, added verimake_partial script, performance improvements. * Verilator 1.0c 1994-09-30 *** Initial release of Verilator * Verilator 0.0 1994-07-08 **** First code written. ---------------------------------------------------------------------- This uses outline mode in Emacs. See C-h m [M-x describe-mode]. Copyright 2001-2020 by Wilson Snyder. This program is free software; you can redistribute it and/or modify it under the terms of either the GNU Lesser General Public License Version 3 or the Perl Artistic License Version 2.0. SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0 Local variables: mode: outline paragraph-separate: "[ \f\n]*$" end: