.. for github, vim: syntax=reStructuredText =============================== Revision History and Change Log =============================== The changes in each Verilator version are described below. The contributors that suggested a given feature are shown in []. Thanks! Verilator 5.009 devel ========================== **Minor:** * Add --public-depth to force public to a certain instance depth (#3952). [Andrew Nolte] * Add --public-params flag (#3990). [Andrew Nolte] * Add STATICVAR warning and convert to automatic (#4018) (#4027) (#4030). [Ryszard Rozak, Antmicro Ltd] * Support class extends of package::class. * Support class srandom and class random stability. * Support method calls without parenthesis (#4034). [Ryszard Rozak, Antmicro Ltd] * Support complicated IEEE 'for' assignments. * Support $fopen as an expression. * Change range order warning from LITENDIAN to ASCRANGE (#4010). [Iztok Jeras] * Change ZERODLY to a warning. * Fix random internal crashes (#666). [Dag Lem] * Fix install, standardization in cmake CMakeLists.txt (#3974). [Yu-Sheng Lin] * Fix UNDRIVEN warning seg fault (#3989). [Felix Neumärker] * Fix symbol entries when inheriting classes (#3995) (#3996). [Krzysztof Boroński] * Fix event controls reusing same variable (#4014). Kamil Rakoczy * Fix push to dynamic queue in struct (#4015). [ezchi] * Fix names for blocks in do..while loop (#4019). [Ryszard Rozak, Antmicro Ltd] * Fix randomize on null field (#4023). [Ryszard Rozak, Antmicro Ltd] * Fix rand fields in base classes (#4025). [Ryszard Rozak, Antmicro Ltd] * Fix large return blocks with --comp-limit-blocks (#4028). [tenghtt] * Fix clocking block scope internal error (#4032). [Srinivasan Venkataramanan] * Fix false LATCH warning on --assert 'unique else if' (#4033) ($4054). [Jesse Taube] * Fix characters from DEFENV literals for conda (#4035) (#4044). [Tim Snyder] * Fix interface generate begin (#4065). [Srinivasan Venkataramanan] * Fix false ENUMVALUE on expressions and arrays. Verilator 5.008 2023-03-04 ========================== **Minor:** * Add --annotate-points option, change multipoint on line reporting (#3876). [Nassim Corteggiani] * Add --verilate-jobs option (#3889). [Kamil Rakoczy, Antmicro Ltd] * Add WIDTHEXPAND and WIDTHTRUNC warnings to replace WIDTH (#3900). [Andrew Nolte] * Add SOURCE_DATE_EPOCH for docs/guide/conf.py (#3918). [Larry Doolittle] * Add /*verilator public[flat|flat_rd|flat_rw| ]*/ metacomments (#3894). [Joseph Nwabueze] * Add lint warning on always_comb multidriven (#3888) (#3939). [Adam Bagley] * Add warning on ++/-- over expressions with potential side effects (#3976). [Krzysztof Boroński] * Add error on mixing .name and by-port instantiations. * Removed deprecated --cdc option. * Support unpacked unions. * Support interface classes and class implements. * Support global clocking and $global_clock. * Support class parameters without initial values. * Support cast to numbers from strings. * Support struct I/O in --lib-create (#3378) (#3892). [Varun Koyyalagunta] * Support function calls without parenthesis (#3903) (#3902). [Ryszard Rozak, Antmicro Ltd] * Support class extending its parameter (#3904). [Ryszard Rozak, Antmicro Ltd] * Support static function variables (#3830). [Ryszard Rozak, Antmicro Ltd] * Support recursive methods (#3987). [Ryszard Rozak, Antmicro Ltd] * Fix real parameters of infinity and NaN. * Fix pattern assignment to unpacked structs (#3510). [Mostafa Garnal] * Fix single-element replication to dynarray/unpacked/queue (#3548). [Gustav Svensk] * Fix constant enum methods (#3621). [Todd Strader] * Fix inconsistent naming of generate scope arrays (#3840). [Andrew Nolte] * Fix namespace fallback resolution (#3863) (#3942). [Aleksander Kiryk, Antmicro Ltd] * Fix std:: to be parsed first (#3864) (#3928). [Aleksander Kiryk, Antmicro Ltd] * Fix cmake warning if multiple SOURCES w/o PREFIX (#3916) (#3927). [Yoda Lee] * Fix parameterized class function linkage (#3917). [Ryszard Rozak] * Fix static members of type aliases of a parameterized class (#3922). [Ryszard Rozak, Antmicro Ltd] * Fix class extend parameter dot case (#3926). [Ryszard Rozak, Antmicro Ltd] * Fix MsWin missing directory exception, and ::std (#3928) (#3933) (#3935). [Kritik Bhimani] * Fix very long VPI signal names (#3929). [Marlon James] * Fix VPI upper interface scopes not found (#3937). [David Stanford] * Fix virus detection false positive (#3944). [Stuart Morris] * Fix constant string function assignment (#3945). [Todd Strader] * Fix constant format field widths (#3946). [Todd Strader] * Fix class field linking when a super classes is a param (#3949). [Ryszard Rozak, Antmicro Ltd] * Fix CMake bad C identifiers (#3948) (#3951). [Zixi Li] * Fix build on HP PA architecture (#3954). [John David Anglin] * Fix date on the front page of verilator.pdf (#3956) (#3957). [Larry Doolittle] * Fix associative arrays declared with ref type (#3960). [Ryszard Rozak, Antmicro Ltd] * Fix missing error on negative replicate (#3963). [Benjamin Menküc] * Fix self references to parameterized classes (#3962). [Ryszard Rozak, Antmicro Ltd] * Fix LITENDIAN warning is backwards (#3966) (#3967). [Cameron Kirk] * Fix subsequent parameter declarations (#3969). [Ryszard Rozak, Antmicro Ltd] * Fix timing delays to not truncate below 64 bits (#3973) (#3982). [Felix Neumärker] * Fix cmake on MacOS to mark weak symbols with -U linker flag (#3978) (#3979). [Peter Debacker] * Fix UNDRIVEN warning seg fault (#3989). [Felix Neumärker] * Fix coverage of class methods (#3998). [Tim Paine] * Fix packed array structure replication. * Fix enum.next(0) and enum.prev(0). Verilator 5.006 2023-01-22 ========================== **Minor:** * Support clocking blocks (#3674). [Krzysztof Bieganski, Antmicro Ltd] * Support packed structs (#3802). [Aleksander Kiryk, Antmicro Ltd] * Support Windows-native builds using cmake (#3814). [Kritik Bhimani] * Support p format for UnpackArray (#3877). [Aleksander Kiryk, Antmicro Ltd] * Support property calls without parenthesis (#3879) (#3893). [Ryszard Rozak, Antmicro Ltd] * Support import/export lists in modport (#3886). [Gökçe Aydos] * Support class queue equality (#3895). [Ilya Barkov] * Support type case and type equality comparisons. * Add IMPLICITSTATIC warning when a task/function is implicitly static (#3839). [Ryszard Rozak, Antmicro Ltd] * Add VL_VALUE_STRING_MAX_WORDS override (#3869). [Andrew Nolte] * Optimize expansion of extend operators. * Internal multithreading tests. [Mariusz Glebocki, et al, Antmicro Ltd] * Fix VPI one-time timed callbacks (#2778). [Marlon James, et al] * Fix initiation of function variables (#3815). [Dan Gisselquist] * Fix to zero possibly uninitialized bits in replications (#3815). * Fix crash in DFT due to width use after free (#3817) (#3820). [Jevin Sweval] * Fix signed/unsigned comparison compile warning (#3822). [Kamil Rakoczy] * Fix OS-X weak symbols with -U linker flag (#3823). [Jevin Sweval] * Fix wrong bit op tree optimization (#3824) (#3825). [Yutetsu TAKATSUKASA] * Fix self references when param class instantiated (#3833). [Ryszard Rozak, Antmicro Ltd] * Fix memory leak in V3Sched, etc. (#3834). [Geza Lore] * Fix compatibility with musl libc / Alpine Linux (#3845). [Sören Tempel] * Fix empty case items crash (#3851). [Rich Porter] * Fix VL_CPU_RELAX on MIPS/Armel/s390/sparc (#3843) (#3891). [Kamil Rakoczy] * Fix module parameter name collision (#3854) (#3855). [James Shi] * Fix unpacked array expansion (#3861). [Joey Liu] * Fix signed/unsigned parameter types (#3866). [James Shi] * Fix chain call of abstract class constructor (#3868) (#3883). [Ilya Barkov] * Fix to use same std in Verilator and Verilated compile (#3881). [Kamil Rakoczy, Antmicro Ltd] * Fix foreach unnamedblk duplicate error (#3885). [Ilya Barkov] * Fix elaboration of member selected classes (#3890). [Ilya Barkov] * Fix mismatched widths in DFG (#3872). [Geza Lore, Yike Zhou] * Fix lint for non-integral types in packed structs. * Fix generate case with empty body statements. Verilator 5.004 2022-12-14 ========================== **Major:** * Support named properties (#3667). [Ryszard Rozak, Antmicro Ltd] * Add ENUMVALUE warning when value misused for enum (#726) (#3777) (#3783). * Deprecate --no-threads; use --threads 1 for single threaded (#3703). [Kamil Rakoczy, Antmicro Ltd] **Minor:** * Support std::semaphore and typed std::mailbox (#3708). [Krzysztof Bieganski, Antmicro Ltd] * Support 'with' in unique, unique_index, min, max in queues (#3772). [Ryszard Rozak, Antmicro Ltd] * Support events in VCD/FST traces (#3759). [Yves Mathieu] * Support foreach loops on strings (#3760). [Ryszard Rozak, Antmicro Ltd] * Support member selects in with clauses (#3775). [Ryszard Rozak, Antmicro Ltd] * Support super.new calls (#3789). [Ryszard Rozak, Antmicro Ltd] * Support randcase. * Support pre_randomize and post_randomize. * Support $timeunit and $timeprecision. * Support assignment expressions. * Change ENDLABEL from warning into an error. * Internal AST improvements, also affect XML format (#3721). [Geza Lore] * Deprecate verilated_fst_sc.cpp and verilated_vcd_sc.cpp. * Disable stack size limit (#3706) (#3751). [Mariusz Glebocki] * Add error when use --exe with --lib-create (#3785). [Yinan Xu] * Fix jump handling in do while loops (#3731). [Ryszard Rozak, Antmicro Ltd] * Fix 'with' clause handling in functions (#3739). [Ryszard Rozak, Antmicro Ltd] * Fix CONTEXT compile error on MingW (#3741). [William D. Jones] * Fix MSVC compiler errors (#3742) (#3746). [Kritik Bhimani] * Fix CASEINCOMPLETE when covers all enum values (#3745) (#3782). [Guy-Armand Kamendje] * Fix return type of $countbits functions to int (#3725). [Ryszard Rozak, Antmicro Ltd] * Fix timing control in while-break loops (#3733) (#3769). [Ryszard Rozak, Antmicro Ltd] * Fix return in constructors (#3734). [Ryszard Rozak, Antmicro Ltd] * Fix missing UNUSED warnings with --coverage (#3736). [alejandro-castro-ortegon] * Fix tracing parameters overridden with -G (#3723). [Iztok Jeras] * Fix folding of LogAnd with non-bool operands (#3726). [Geza Lore] * Fix DFG optimization issues (#3740) (#3771). [Geza Lore] * Fix pre/postincrement operations (#3744) (#3756). [Ryszard Rozak, Antmicro Ltd] * Fix cross-compile for MingW, Arm and RISC-V (#3752). [Miodrag Milanović] * Fix $unit as base package for other packages (#3755). [Ryszard Rozak, Antmicro Ltd] * Fix make jobserver with submakes (#3758). [Gus Smith] * Fix to escape VERILATOR_ROOT file paths (#3764) (#3765). [Jiacheng Qian] * Fix empty string literals converting to string types (#3774). [miree] * Fix to remove $date from .vcd files (#3779). [Larry Doolittle] * Fix missing user objects in --lib-create mode (#3780) (#3784). [Yinan Xu] * Fix non-blocking assignments in forks (#3781) (#3800). [Krzysztof Bieganski, Antmicro Ltd] * Fix forks without any delayed statements (#3792) (#3801). [Krzysztof Bieganski, Antmicro Ltd] * Fix internal error in bit op tree optimization (#3793). [Yutetsu TAKATSUKASA] * Fix lint_off EOFNEWLINE in .vlt files (#3796). [Andrew Nolte] * Fix wait 0. * Fix comparing ranged slices of unpacked arrays. Verilator 5.002 2022-10-29 ========================== **Major:** * This is a major new release. * Require C++20 for the new --timing features. Upgrading to a C++20 or newer compiler is strongly recommended. * Support the Active and NBA scheduling regions as defined by the SystemVerilog standard (IEEE 1800-2017 chapter 4). This means all generated clocks are now simulated correctly (#3278, #3384). [Geza Lore, Shunyao CAD] * Support timing controls (delays, event controls in any location, wait statements) and forks. [Krzysztof Bieganski, Antmicro Ltd] This may require adding --timing or --no-timing. See docs for details. * Introduce a new combinational logic optimizer (DFG), that can yield significant performance improvements on some designs. [Geza Lore, Shunyao CAD] * Add --binary option as alias of --main --exe --build --timing (#3625). For designs where C++ was only used to make a simple no-I/O testbench, we recommend abandoning that C++, and instead letting Verilator build it with --binary (or --main). **Minor:** * Split UNUSED warning into genvar, param, and signal warnings (#3607). [Topa Topino] * Support standalone 'this' in classes (#2594) (#3248) (#3675). [Arkadiusz Kozdra, Antmicro Ltd] * Support tristate select/extend (#3604). [Ryszard Rozak, Antmicro Ltd> * Support linting for top module interfaces (#3635). [Kanad Kanhere] * Support virtual interfaces (#3654). [Arkadiusz Kozdra, Antmicro Ltd] * Support class type params without defaults (#3693). [Krzysztof Bieganski, Antmicro Ltd] * Support empty generate_regions (#3695). [mpb27] * Support access to constructs inside type parameters (#3702). [Arkadiusz Kozdra, Antmicro Ltd] * Add --dump-tree-dot to enable dumping Ast Tree .dot files (#3636). [Marcel Chang] * Add --get-supported to determine what features are in Verilator. * Add error on real edge event control. * Fix false LATCH warning on 'unique if' (#3088). [Rachit Nigam] * Fix cell assigning integer array parameters (#3299). [Michael Platzer] * Fix LSB error on --hierarchical submodules (#3539). [danbone] * Fix $display of fixed-width numbers (#3565). [Iztok Jeras] * Fix foreach and pre/post increment in functions (#3613). [Nandu Raj] * Fix linker errors in user-facing timing functions (#3657). [Krzysztof Bieganski, Antmicro Ltd] * Fix null access on optimized-out fork statements (#3658). [Krzysztof Bieganski, Antmicro Ltd] * Fix VPI inline module naming mismatch (#3690) (#3694). [Jiuyang Liu] * Fix deadlock in timeprecision when using SystemC (#3707). [Kamil Rakoczy, Antmicro Ltd] * Fix width mismatch on inside operator (#3714). [Alex Torregrosa] Verilator 4.228 2022-10-01 ========================== **Announcement:** * The next release is anticipated to premiere Verilator Version 5. Please consider beta-testing the github 'develop-v5' branch, which will soon merge into the github 'master' branch (#3383). **Minor:** * Support some IEEE signal strengths (#3601) (#3629). [Ryszard Rozak, Antmicro Ltd] * Add --main to generate main() C++ (previously was experimental only). * Add --build-jobs, and rework arguments for -j (#3623). [Kamil Rakoczy] * Rename --bin to --build-dep-bin. * Rename debug flags --dumpi-tree, --dumpi-graph, etc. [Geza Lore] * Fix thread safety in SystemC VL_ASSIGN_SBW/WSB (#3494) (#3513). [Mladen Slijepcevic] * Fix crash in gate optimization of circular logic (#3543). [Bill Flynn] * Fix arguments in non-static method call (#3547) (#3582). [Gustav Svensk] * Fix default --mod-prefix when --prefix is repeated (#3603). [Geza Lore] * Fix calling trace() after open() segfault (#3610) (#3627). [Yu-Sheng Lin] * Fix typedef'ed class conversion to Boolean (#3616). [Aleksander Kiryk] * Fix Verilation speed when disabled warnings (#3632). [Kamil Rakoczy, Antmicro Ltd] Verilator 4.226 2022-08-31 ========================== **Minor:** * Add --future0 and --future1 options. * Support class parameters (#2231) (#3541). [Arkadiusz Kozdra, Antmicro Ltd] * Support wildcard index associative arrays (#3501). [Arkadiusz Kozdra, Antmicro Ltd] * Support negated properties (#3572). [Aleksander Kiryk] * Support $test$plusargs(expr) (#3489). * Rename trace rolloverSize() (#3570). * Improve Verilation speed with --threads on large designs. [Geza Lore] * Improve Verilation memory by reducing V3Number (#3521). [Mariusz Glebocki, Antmicro Ltd] * Fix struct pattern assignment (#2328) (#3517). [Mostafa Gamal] * Fix public combo propagation issues (#2905). [Todd Strader] * Fix incorrect tristate logic (#3399) [shareefj, Vighnesh Iyer] * Fix incorrect bit op tree optimization (#3470). [algrobman] * Fix bisonpre for MSYS2 (#3471). * Fix max memory usage (#3483). [Kamil Rakoczy, Antmicro Ltd] * Fix empty string arguments to display (#3484). [Grulfen] * Fix table optimizing away display (#3488). [Stefan Post] * Fix unique_ptr memory header for MinGW64 (#3493). * Fix $dump system task with --output-split-cfuncs (#3495) (#3497). [Varun Koyyalagunta] * Fix wrong bit op tree optimization (#3509). [Nathan Graybeal] * Fix nested default assignment for struct pattern (#3511) (#3524). [Mostafa Gamal] * Fix sformat string incorrectly cleared (#3515) (#3519). [Gustav Svensk] * Fix segfault exporting non-existent package (#3535). * Fix void-cast queue pop_front or pop_back (#3542) (#3364). [Drew Ranck] * Fix case statement comparing string literal (#3544). [Gustav Svensk] * Fix === with some tristate constants (#3551). [Ryszard Rozak, Antmicro Ltd] * Fix converting classes to string (#3552). [Arkadiusz Kozdra, Antmicro Ltd] * Fix --hierarchical with order-based pin connections (#3583) (#3585). [Kelin9298] Verilator 4.224 2022-06-19 ========================== **Major:** * VCD tracing is now parallelized with --threads (#3449). [Geza Lore, Shunyao CAD] **Minor:** * Add -f options to replace -O options (#3436). * Changed --no-merge-const-pool to -fno-merge-const-pool (#3436). * Changed --no-decoration to remove output whitespace (#3460). [Kamil Rakoczy] * Support compile time trace signal selection with tracing_on/off (#3323). [Shunyao CAD] * Support non-ANSI interface port declarations (#3439). [Geza Lore, Shunyao CAD] * Support concat assignment to packed array (#3446). * Improve conditional merging optimization (#3125). [Geza Lore, Shunyao CAD] * Define VM_TRACE_VCD when tracing in VCD format. [Geza Lore, Shunyao CAD] * Add assert when VerilatedContext is mis-deleted (#3121). [Rupert Swarbrick] * Internal prep work towards timing control. [Krzysztof Bieganski, Antmicro Ltd] * Fix hang with large case statement optimization (#3405). [Mike Urbach] * Fix UNOPTFLAT warning from initial static var (#3406). [Kamil Rakoczy] * Fix compile error when enable VL_LEAK_CHECKS (#3411). [HungMingWu] * Fix cmake rules to support higher-level targets (#3377) (#3386). [Martin Stadler] * Fix BLKANDNBLK on $readmem/$writemem (#3379). [Alex Solomatnikov] * Fix 'with' operator with type casting (#3387). [xiak95] * Fix incorrect conditional merging (#3409). [Raynard Qiao] * Fix passing VL_TRACE_FST_WRITER_THREAD in CMake build. [Geza Lore, Shunyao CAD] * Fix compile error under strict C++11 mode (#3463). [Kevin Kiningham] * Fix public unpacked input ports (#3465). [Todd Strader] Verilator 4.222 2022-05-02 ========================== **Minor:** * Split --prof-threads into --prof-exec and --prof-pgo (#3365). [Geza Lore, Shunyao CAD] * Deprecate 'vluint64_t' and similar types (#3255). * Raise error on assignment to const in initial blocks. [Geza Lore, Shunyao CAD] * Issue INITIALDLY/COMBDLY/BLKSEQ warnings consistent with Verilator execution. [Geza Lore, Shunyao CAD] * Support LoongArch ISA multithreading (#3353) (#3354). [Xi Zhang] * Fix MSVC localtime_s (#3124). * Fix Bison 3.8.2 error (#3366). [elike-ypq] * Fix rare bug in -Oz (V3Localize) (#3286). [Geza Lore, Shunyao CAD] * Fix tracing interfaces inside interfaces (#3309). [Kevin Millis] * Fix filenames with dots overwriting debug .vpp files (#3373). * Fix including VK_USER_OBJS in make library (#3370) (#3382). [Julien Margetts] * Fix hang in generate symbol references (#3391) (#3398). [Yoda Lee] * Fix missing #include (#3392). [Aliaksei Chapyzhenka] * Fix crash in recursive module inlining (#3393). [david-sawatzke] * Fix --protect-ids mangling names of library methods. [Geza Lore, Shunyao CAD] * Fix foreach segmentation fault (#3400). [Kamil Rakoczy] Verilator 4.220 2022-03-12 ========================== **Minor:** * Removed the deprecated lint_off flag -msg; use -rule instead. * Removed the deprecated "fl" attribute in XML output; use "loc" attribute instead. * Suppress WIDTH warning on negate using carry bit (#3295). [Peter Monsson] * Add trace dumpvars() call for selective runtime tracing (#3322). [Shunyao CAD] * Add VERILATOR_VERSION_INTEGER for determining API (#3343). [Larry Doolittle] * Improve various V3Combine algorithm details (#3328). [Yutetsu TAKATSUKASA] * Improve various V3Order algorithm details. [Geza Lore] * Fix MacOS arm64 build (#3285) (#3291). [Guokai Chen] * Fix signed number operation (#3294) (#3308). [Raynard Qiao] * Fix FST traces to include vector range (#3296) (#3297). [Jamie Iles] * Fix skipping public enum values with four-state values (#3303). * Fix $readmem file not found to be warning not error (#3310). [Alexander Grobman] * Fix class stringification on wide arrays (#3312). [Iru Cai] * Fix $fscanf etc to return -1 on EOF (#3313). [Jose Tejada] * Fix public function arguments that are arrayed (#3316). [pawel256] * Fix unnamedblk error on foreach (#3321). [Aliaksei Chapyzhenka] * Fix crash in recursive module inlining (#3324). [Larry Doolittle] * Fix VL_RESTORER behavior on passing a lvalue reference (#3326). [HungMingWu] * Fix compile error with --trace-fst --sc (#3332). [leavinel] * Fix cast to array types (#3333). [Todd Strader] * Fix Vdeeptemp error with --threads and --compiler clang (#3338). [Per Karlsson] Verilator 4.218 2022-01-17 ========================== **Major:** * Primary inputs and outputs (VL_INW/VL_OUTW) now use VlWide type. In general this should be backward compatible, but may lead to some wrapper code needing changes. * Option --cdc is deprecated and is planned for removal, file a bug if this is still being used. **Minor:** * Support class static members (#2233). * Support force/release (#2431) (#2593). [Shunyao CAD] * Add 'forceable' attribute to allow forcing from C++. (#3272). [Geza Lore, Shunyao CAD] * Support lower dimension looping in foreach loops (#3172). [Ehab Ibrahim] * Support up to 64 bit enums for .next/.prev/.name (#3244). [Alexander Grobman] * Reduce .rodata footprint of trace initialization (#3250). [Geza Lore, Shunyao CAD] * Support FST tracing in hierarchical Verilation (#3251). [Yutetsu TAKATSUKASA] * Use C++11 standard types for MacOS portability (#3254) (#3257). [Adrien Le Masle] * Fix make support for BSD ar (#2999) (#3256). [Julie Schwartz] * Fix bad ending address on $readmem (#3205). [Julie Schwartz] * Fix MSWIN compile error (#2681). [Unai Martinez-Corral] * Fix break under foreach loop (#3230). * Fix VL_STREAML_FAST_QQI with 64 bit left-hand-side (#3232) (#3235). [Adrien Le Masle] * Fix $sformat of inputs/outputs (#3236). [Adrien Le Masle] * Fix associative array first method as statement (#3228). [Adrien Le Masle] * Fix associative array foreach loop (#3229). * Fix $fclose not accepting expressions (#3237). [Julie Schwartz] * Fix $random not updating seed (#3238). [Julie Schwartz] * Fix top level param overwrite when package has same param (#3241) (#3247). [Adrien Le Masle] * Fix spurious UNUSED by ignoring inout pin connections (#3242). [Julie Schwartz] * Fix splitting of _eval and other top level functions. [Geza Lore, Shunyao CAD] * Fix internal error by inout port (#3258). [Yutetsu TAKATSUKASA] * Fix GCC 11 compile error (#3273). [HungMingWu] Verilator 4.216 2021-12-05 ========================== **Major:** * Add --lib-create, similar to --protect-lib but without protections. * Support tracing through --hierarchical/--lib-create libraries (#3200). **Minor:** * Internal code cleanups and improvements. [Geza Lore] * Improve --thread Verilation-time performance. * Support task name in $display %m (#3211). [Julie Schwartz] * Make 'bit', 'logic' and 'time' types unsigned by default. [Geza Lore] * Optimize $random concatenates/selects (#3114). * Fix array method names with parenthesis (#3181) (#3183). [Teng Huang] * Fix split_var assign merging (#3177) (#3179). [Yutetsu TAKATSUKASA] * Fix wrong bit op tree optimization (#3185). [Yutetsu TAKATSUKASA] * Fix some SliceSels not being constants (#3186) (#3218). [Michaël Lefebvre] * Fix nested generate if genblk naming (#3189). [yanx21] * Fix hang on recursive definition error (#3199). [Jonathan Kimmitt] * Fix display of signed without format (#3204). [Julie Schwartz] * Fix display of empty string constant (#3207) (#3215). [Julie Schwartz] * Fix incorrect width after and-or optimization (#3208). [Julie Schwartz] * Fix $fopen etc on integer arrays (#3214). [adrienlemasle] * Fix $size on dynamic strings (#3216). * Fix %0 format on $value$plusargs (#3217). * Fix timescale portability on Arm64 (#3222). Verilator 4.214 2021-10-17 ========================== **Major:** * Add profile-guided optimization of mtasks (#3150). **Minor:** * Verilator_gantt has removed the ASCII graphics, use the VCD output instead. * Verilator_gantt now shows the predicted mtask times, eval times, and additional statistics. * Verilator_gantt data files now include processor information, to allow later processing. * Support displaying x and z in $display task (#3107) (#3109). [Iru Cai] * Fix verilator_profcfunc profile accounting (#3115). * Fix display has no time units on class function (#3116). [Damien Pretet] * Fix removing if statement with side effect in condition (#3131). [Alexander Grobman] * Fix --waiver-output for multiline warnings (#2429) (#3141). [Keith Colbert] * Fix internal error on bad widths (#3140) (#3145). [Zhanglei Wang] * Fix crash on clang 12/13 (#3148). [Kouping Hsu] * Fix cygwin compile error due to missing -std=gnu++14 (#3149). [Sun Kim] * Fix $urandom_range when the range is 0 ... UINT_MAX (#3161). [Iru Cai] * Fix constructor-parameter argument comma-separation in C++ (#3162). [Matthew Ballance] * Fix missing install of vl_file_copy/vl_hier_graph (#3165). [Popolon] * Fix calling new with arguments in same class (#3166). [Matthew Ballance] * Fix false EOFNEWLINE warning when DOS carriage returns present (#3171). Verilator 4.212 2021-09-01 ========================== **Minor:** * Fix re-evaluation of logic dependent on state set in DPI exports (#3091). [Geza Lore] * Support unpacked array localparams in tasks/functions (#3078). [Geza Lore] * Support timeunit/timeprecision in $unit. * Support assignment patterns as children of pins (#3041). [Krzysztof Bieganski, Antmicro Ltd] * Add --instr-count-dpi to tune assumed DPI import cost for multithreaded model scheduling. Default value changed to 200 (#3068). [Yinan Xu] * Output files are split based on the set of headers required in order to aid incremental compilation via ccache (#3071). [Geza Lore] * Parameter values are now emitted as 'static constexpr' instead of enum. C++ direct references to parameters might require updating (#3077). [Geza Lore] * Refactored Verilated include files; include verilated.h not verilated_heavy.h. * Add header guards on Dpi.h generated files (#2979). [Tood Strader] * Add XML ccall, constpool, initarray, and if/while begins (#3080). [Steven Hugg] * Add error when constant function under a generate (#3103). [Don Owen] * Fix -G to treat simple integer literals as signed (#3060). [Anikin1610] * Fix emitted string array initializers (#2895). [Iztok Jeras] * Fix bitop tree optimization dropping necessary & operator (#3096). [Flavien Solt] * Fix internal error on wide -x-initial unique (#3106). [Alexandre Joannou] * Fix traces to show array instances with brackets (#3092) (#3095). [Pieter Kapsenberg] Verilator 4.210 2021-07-07 ========================== **Major:** * Generated code is now emitted as global functions rather than methods. '$c' contents might need to be updated, see the docs (#3006). [Geza Lore] * The generated model class instantiated by the user is now an interface object and no longer the TOP module instance. User code with direct C++ member access to model internals, including verilator public_flat items will likely need to be updated. See the manual for instructions: https://verilator.org/guide/latest/connecting.html#porting-from-pre-4-210 (#3036). [Geza Lore] **Minor:** * Add --prof-c to pass profiling to compiler (#3059). [Alexander Grobman] * Optimize a lot more model variables into function locals (#3027). [Geza Lore] * Support middle-of-design nested top modules (#3026). [Dan Petrisko] * Remove deprecated --no-relative-cfuncs option (#3024). [Geza Lore] * Remove deprecated --inhibit-sim option (#3035). [Geza Lore] * Merge const static data globally into a new constant pool (#3013). [Geza Lore] * Allow configure override of AR program (#2999). [ahouska] * In XML, show pinIndex information (#2877). [errae233] * Fix error on unsupported recursive functions (#2957). [Trefor Southwell] * Fix type parameter specialization when struct names are same (#3055). [7FM] * Improve speed of table optimization (-OA) pass. [Geza Lore] Verilator 4.204 2021-06-12 ========================== **Minor:** * Add 'make ccache-report' (#3011). [Geza Lore] * Add --reloop-limit argument (#2943) (#2960). [Geza Lore] * Add --expand-limit argument (#3005). [Julien Margetts] * Add TRACE_THREADS to CMake (#2934). [Jonathan Drolet] * Optimize large lookup tables to static data (#2925). [Geza Lore] * Optimize reloop to accept constant index offsets (#2939). [Geza Lore] * Split always blocks to better respect --output-split-cfuncs. [Geza Lore] * Support ignoring "`pragma protect ..." (#2886). [Udi Finkelstein] * Support --trace-fst for SystemC with CMake (#2927). [Jonathan Drolet] * Update cmake latest C++ Standard Compilation flag (#2951). [Ameya Vikram Singh] * Prep work towards better ccache hashing/performance. [Geza Lore] * Fix assertion failure in bitOpTree optimization (#2891) (#2899). [Raynard Qiao] * Fix DPI functions not seen as vpiModule (#2893). [Todd Strader] * Fix bounds check in VL_SEL_IWII (#2910). [Krzysztof Bieganski, Antmicro Ltd] * Fix slowdown in elaboration (#2911). [Nathan Graybeal] * Fix initialization of assoc in assoc array (#2914). [myftptoyman] * Fix make support for gmake 3.x (#2920) (#2921). [Philipp Wagner] * Fix VPI memory access for packed arrays (#2922). [Todd Strader] * Fix MCD close also closing stdout (#2931). [Alexander Grobman] * Fix split procedures to better respect --output-split-cfuncs (#2942). [Geza Lore] * Fix to emit 'else if' without nesting (#2944). [Geza Lore] * Fix part select issues in LATCH warning (#2948) (#2938). [Julien Margetts] * Fix to not emit empty files with low split limits (#2961). [Geza Lore] * Fix merging of assignments in C++ code (#2970). [Rupert Swarbrick] * Fix unused variable warnings (#2991). [Pieter Kapsenberg] * Fix --protect-ids when using SV classes (#2994). [Geza Lore] * Fix constant function calls with uninitialized value (#2995). [yanx21] * Fix Makefiles to support Windows EXEEXT usage (#3008). [Miodrag Milanovic] Verilator 4.202 2021-04-24 ========================== **Major:** * Documentation has been rewritten into a book format. * Verilated signals now use VlWide and VlPacked in place of C arrays. **Minor:** * Add an URL on warnings to point to the manual's description. * Add EOFNEWLINE warning when missing a newline at EOF. * Changed TIMESCALEMOD from error into a warning. * Mark --no-relative-cfuncs as scheduled for deprecation. * Add --coverage-max-width (#2853). [xuejiazidi] * Add VerilatedCovContext::forcePerInstance (#2793). [Kevin Laeufer] * Add FST SystemC tracing (#2806). [Alex Torregrosa] * Add PINNOTFOUND warning in place of error (#2868). [Udi Finkelstein] * Support overlaps in priority case statements (#2864). [Rupert Swarbrick] * Support for null ports (#2875). [Udi Finkelstein] * Fix class unpacked-array compile error (#2774). [Iru Cai] * Fix scope types in FST and VCD traces (#2805). [Alex Torregrosa] * Fix exceeding command-line ar limit (#2834). [Yinan Xu] * Fix false $dumpfile warning on model save (#2834). [Yinan Xu] * Fix --timescale-override not suppressing TIMESCALEMOD (#2838). [Kaleb Barrett] * Fix false TIMESCALEMOD on generate-ignored instances (#2838). [Kaleb Barrett] * Fix --output-split with class extends (#2839). [Iru Cai] * Fix false WIDTHCONCAT on casted constant (#2849). [Rupert Swarbrick] * Fix tracing of long hashed names (#2854). [Graham Rushton] * Fix --public-flat-rw / DPI issue (#2858). [Todd Strader] * Fix interface localparam access (#2859). [Todd Strader] * Fix Cygwin example compile issues (#2856). [Mark Shaw] * Fix select of with index variable (#2880). [Alexander Grobman] * Fix cmake version number to be numeric (#2881). [Yuri Victorovich] * Fix MinGW not supporting 'localtime_r' (#2882). [HyungKi Jeong] * Fix cast from packed, typedef'ed interface signal (#2884). [Todd Strader] * Fix VPI package reported as vpiModule (#2885). [Todd Strader] * Fix dumping waveforms to multiple FST files (#2889). [David Metz] * Fix assertion failure in bitOpTree (#2892). [Yutetsu TAKATSUKASA] * Fix V3Premit infinite loop on always read-and-write (#2898). [Raynard Qiao] * Fix VPI packed vectors (#2900). [Todd Strader] * Fix VPI public interface parameters (#2901). [Todd Strader] Verilator 4.200 2021-03-12 ========================== **Announcement:** * --inhibit-sim is planned for deprecation, file a bug if this is still being used. **Major:** * Add simulation context (VerilatedContext) to allow multiple fully independent models to be in the same process. Please see the updated examples. (#2660) * Add context->time() and context->timeInc() API calls, to set simulation time. These now are recommended in place of the legacy sc_time_stamp(). **Minor:** * Converted Asciidoc documentation into reStructuredText (RST) format. * Fix range inheritance on port without data type (#2753). [Embedded Go] * Fix slice-assign overflow (#2803) (#2811). [David Turner] * Fix interface array connection ordering broken in v4.110 (#2827). [Don Owen] * Fix or-reduction on different scopes broken in 4.110 (#2828). [Yinan Xu] * Fix MSVC++ compile error. (#2831) (#2833) [Drew Taussig] Verilator 4.110 2021-02-25 ========================== **Major:** * Optimize bit operations and others (#2186) (#2632) (#2633) (#2751) (#2800) [Yutetsu TAKATSUKASA] **Minor:** * Support concat selection (#2721). * Support struct scopes when dumping structs to VCD (#2776) [Alex Torregrosa] * Generate SELRANGE for potentially unreachable code (#2625) (#2754) [Pierre-Henri Horrein] * For --flatten, override inlining of public and no_inline modules (#2761) [James Hanlon] * Fix little endian interface pin swizzling (#2475). [Don Owen] * Fix range inheritance on port without data type (#2753). [Embedded Go] * Fix TIMESCALE warnings on primitives (#2763). [Xuanqi] * Fix to exclude strings from toggle coverage (#2766) (#2767) [Paul Wright] * Fix $fread extra semicolon inside statements. [Leendert van Doorn] * Fix class extends with VM_PARALLEL_BUILDS (#2775). [Iru Cai] * Fix shifts by > 32 bit values (#2785). [qrq992] * Fix examples not flushing vcd (#2787). [Richard E George] * Fix little endian packed array pattern assignment (#2795). [Alex Torregrosa] Verilator 4.108 2021-01-10 ========================== **Major:** * Many VPI changes for IEEE compatibility, which may alter behavior from previous releases. * Support randomize() class method and rand (#2607). [Krzysztof Bieganski, Antmicro Ltd] **Minor:** * Support $cast and new CASTCONST warning. * Add --top option as alias of --top-module. * Add LATCH and NOLATCH warnings (#1609) (#2740). [Julien Margetts] * Remove Unix::Processors internal test dependency. * Report UNUSED on parameters, localparam and genvars (#2627). [Charles Eric LaForest] * Add error on real to non-real output pins (#2690). [Peter Monsson] * Support package imports before parameters in interfaces (#2714). [James Hanlon] * Support --sanitize in internal tests (#2705). [Yutetsu TAKATSUKASA] * Fix passing parameter type instantiations by position number. * Fix DPI open array handling issues. * Fix error when dotted refers to missing module (#2095). [Alexander Grobman] * Fix little endian packed array counting (#2499). [phantom-killua] * Fix showing reference locations for BLKANDNBLK (#2170). [Yuri Victorovich] * Fix genblk naming to match IEEE (#2686). [tinshark] * Fix VPI memory word indexing (#2695). [Marlon James] * Fix vpiLeftRange on little-endian memories (#2696). [Marlon James] * Fix VPI module tree (#2704). [Todd Strader] * Fix vpi_release_handle to be called implicitly per IEEE (#2706). * Fix to allow inheriting 'VerilatedVcdFile' class. (#2720) [HyungKi Jeong] * Fix $urandom_range maximum value (#2723). [Nandu Raj] * Fix tracing empty sc module (#2729). * Fix generate for unrolling to be signed (#2730). [yanx21] * Fix to emit timescale in hierarchical blocks (#2735). [Yutetsu TAKATSUKASA] * Fix to ignore coverage on real ports (#2741) (#2745). [Paul Wright] Verilator 4.106 2020-12-02 ========================== **Major:** * Change -sv option to select 1800-2017 instead of 1800-2005. **Minor:** * Check for proper 'local' and 'protected' (#2228). * Support $random and $urandom seeds. * Support $monitor and $strobe. * Support complex function arguments. * Support 'super'. * Support 'with item.index'. * Fix the default GNU Make executable name on FreeBSD (#2553). [Yuri Victorovich] * Fix trace signal names getting hashed (#2643). [Barbara Gigerl] * Fix unpacked array parameters near functions (#2639). [Anderson Ignacio da Silva] * Fix access to non-overridden base class variable (#2654). [Tobias Rosenkranz] Verilator 4.104 2020-11-14 ========================== **Minor:** * Support queue and associative array 'with' statements (#2616). * Support queue slicing (#2326). * Support associative array pattern assignments and defaults. * Support static methods and typedefs in classes (#2615). [Krzysztof Bieganski, Antmicro Ltd] * Add error on typedef referencing self (#2539). [Cody Piersall] * With --debug, turn off address space layout randomization. * Fix iteration over mutating list bug in VPI (#2588). [Kaleb Barrett] * Fix cast width propagation (#2597). [flex-liu] * Fix return from callValueCbs (#2589) (#2605). [Marlon James] * Fix WIDTH warnings on comparisons with nullptr (#2602). [Rupert Swarbrick] * Fix fault when $fgets, $sscanf, etc used with string (#2604). [Yutetsu TAKATSUKASA] * Fix WIFEXITED missing from MinGW/MSYS2 (#2609). [Jean Berniolles] * Fix queue poping wrong value when otherwise unused (#2512). [nanduraj1] * Fix arrays of modport interfaces (#2614). [Thierry Tambe] * Fix split_var internal error (#2640) (#2641). [Yutetsu TAKATSUKASA] Verilator 4.102 2020-10-15 ========================== **Minor:** * Support const object new() assignments. * Support # as a comment in -f files (#2497). [phantom-killua] * Support 'this' (#2585). [Rafal Kapuscik] * Support defines for FST tracing (#2592). [Markus Krause] * Support non-overlapping implication inside properties (#1292). [Peter Monsson] * Fix timescale with --hierarchical (#2554). [Yutetsu TAKATSUKASA] * Fix cmake build with --hierarchical (#2560). [Yutetsu TAKATSUKASA] * Fix -G dropping public indication (#2561). [Andrew Goessling] * Fix $urandom_range passed variable (#2563). [nanduraj1] * Fix method calls to package class functions (#2565). [Peter Monsson] * Fix class wide member display (#2567). [Nandu Raj P] * Fix hierarchical references inside function (#2267) (#2572). [James Pallister] * Fix flushCall for backward compatibility (#2580). [chenguokai] * Fix preprocessor stringify of undefined macro. [Martin Whitaker] Verilator 4.100 2020-09-07 ========================== **Major:** * C++11 or newer compilers are now required. * SystemC 2.3.0 or newer (SYSTEMC_VERSION >= 20111121) is now required. * Support hierarchical Verilation (#2206). [Yutetsu TAKATSUKASA] **Minor:** * Support (with limitations) class extern, class extends, virtual class. * Support $urandom, $urandom_range without stability. * Support assume property. [Peter Monsson] * Support non-overlapping implication inside properties (#1292). [Peter Monsson] * Fix false DECLFILENAME on black-boxed modules (#2430). [Philipp Wagner] * Fix naming of "id : begin" blocks. * Fix class constructor error on assignments to const. * Fix splitting eval functions with --output-split-cfuncs (#2368). [Geza Lore] * Fix queues as class members (#2525). [nanduraj1] Verilator 4.040 2020-08-15 ========================== **Announcement:** * Version 4.040 is planned to be the final version that will support pre-C++11 compilers. Please move to C++11 or newer compilers. **Minor:** * Fix arrayed interfaces, broke in 4.038 (#2468). [Josh Redford] * Support $stable, $rose and $fell. (#2148) (#2501) [Peter Monsson] * Support simple function localparams (#2461). [James Hanlon] * Miscellaneous parsing error changes towards UVM support. * Fix arrayed interfaces (#2469). [Josh Redford] * Fix protect lib VCS warning. (#2479) [Julien Margetts] * Fix combining different-width parameters (#2484). [abirkmanis] * Fix protect-lib without sequential logic (#2492). [Yutetsu TAKATSUKASA] * Fix V3Unknown from running with flat XML output (#2494). [James Hanlon] * Fix non-32 bit conversion to float (#2495). [dsvf] * Fix casting non-self-determined subexpressions (#2493). [phantom-killua] * Fix SystemC net names (#2500). [Edgar E. Iglesias] * Fix build with Bison 3.7 and newer (#2505). [Rupert Swarbrick] * Fix slice of unpacked array (#2506) (#2507). [Yutetsu TAKATSUKASA] Verilator 4.038 2020-07-11 ========================== **Announcement:** * Versions 4.038 and 4.040 are planned to be the final versions that will support pre-C++11 compilers. Please move to C++11 or newer compilers. **Minor:** * Support VPI access to parameters and localparam. [Ludwig Rogiers] * Support parsing (not elaboration, yet) of UVM. * Add new UNSUPPORTED error code to replace most previous Unsupported: messages. * With --bbox-unsup continue parsing on many (not all) UVM constructs. * Support for-loop increments with commas. * Support $swrite with arbitrary arguments. * Support $writememb (#2450). [Fan Shupei] * Fix OS X, Free BSD, and -m32 portability issues. [Geza Lore] * Fix to flush FST trace on termination due to $stop or assertion failure. * Fix part select error when multipling by power-of-two (#2413). [Conor McCullough] * Fix division exception (#2460) [Kuoping Hsu] Verilator 4.036 2020-06-06 ========================== **Major:** * OPT_FAST is now -Os by default. See the BENCHMARKING & OPTIMIZATION part of the manual if you experience issues with compilation speed. * --output-split is now on by default. VM_PARALLEL_BUILDS is set by default iff the --output-split caused an actual file split to occur. --output-split-cfuncs and --output-split-ctrace now default to the value of --output-split. These changes should improve build times of medium and large designs with default options. User makefiles may require changes. **Minor:** * Configure now enables SystemC if it is installed as a system headers, e.g. with 'apt-get install systemc-dev'. * Add --waiver-output flag that writes a verilator config file (.vlt) with waivers to the warnings emitted during a Verilator run. * Support verilator_coverage --write-info for lcov HTML reports. * Line Coverage now tracks all statement lines, not just branch lines. * The run-time library is now compiled with -Os by default. (#2369, #2373) * Support multi channel descriptor I/O (#2190) [Stephen Henry] * Support $countbits. (#2287) [Yossi Nivin] * Support $isunbounded and parameter $. (#2104) * Support unpacked array .sum and .product. * Support prefix/postfix increment/decrement. (#2223) [Maciej Sobkowski] * Fix FST tracing of little bit endian signals. [Geza Lore] * Fix +: and -: on unpacked arrays. (#2304) [engr248] * Fix $isunknown with constant Z's. * Fix queues and dynamic array wide ops. (#2352) [Vassilis Papaefstathiou] Verilator 4.034 2020-05-03 ========================== **Major:** * Support simplistic classes 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] **Minor:** * 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. * Add support of --trace-structs for CMake (#2986). [Martin Schmidt] * 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 ========================== **Minor:** * 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 ========================== **Major:** * Add split_var metacomment to assist UNOPTFLAT fixes. (#2066) [Yutetsu TAKATSUKASA] * Support $dumpfile and $dumpvars. (#2126) [Alexander Grobman] * Support dynamic arrays. (#379) **Minor:** * 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. * Support $displayb/o/h, $writeb/o/h, etc. (#1637) * Use gcc -Os in examples instead of -O2 for better average performance. * Fix genblk naming with directly nested generate blocks. (#2176) [Alexander Grobman] * Fix undeclared VL_SHIFTR_WWQ. (#2114) [Alex Solomatnikov] Verilator 4.028 2020-02-08 ========================== **Major:** * Support attributes (public, isolate_assignments, etc.) in configuration files. * Add -match to lint_off to waive warnings. [Philipp Wagner] **Minor:** * 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) [Yuri Victorovich] * Fix VPI scope naming for public modules. [Nandu Raj] * Fix FST tracing of enums inside structs. [fsiegle] * Fix WIDTH warning on . * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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, combine hier information 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 ========================== **Major:** * Add GTKWave FST native tracing. (#1356) [Sergi Granell] (Verilator developers need to pull the latest vcddiff.) **Minor:** * 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 ========================== **Major:** * 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. **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 $clog2 to be in verilog 2005. (#1319) [James Hutchinson] Verilator 3.922 2018-03-17 ========================== **Major:** * Support IEEE 1800-2017 as default language. **Minor:** * Support trig functions ($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 ========================== **Announcement:** * Moving forward, use the git "stable" branch to track the latest release, and git "v#.###" tags for specific releases. **Minor:** * Support 'assume' similar to 'assert'. (#1269) [Dan Gisselquist] * Remove c++filt. (#1265) [Stefan Wallentowitz] * 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] Verilator 3.918 2018-01-02 ========================== **Minor:** * 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] * Fix GCC false warning on array bounds. (#2386) Verilator 3.916 2017-11-25 ========================== **Minor:** * 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 ========================== **Major:** * Add new examples/ directory with appropriate examples. This replaces the old test_c and test_sc directories. **Minor:** * 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 ========================== **Major:** * Verilated headers no longer "use namespace std;" User's code without "std::" prefixes may need "use namespace std;" to compile. **Minor:** * Support or/and/xor array intrinsic methods. (#1210) [Mike Popoloski] * Support package export. (#1217) [Usuario Eda] * Support module port parameters without defaults. (#1213) [Mike Popoloski] * Add performance information to --stats file. * Simplify VL_CONST_W macro generation for faster compiles. * Optimize improvements for Shift-And, and replication constructs. * Fix ordering of arrayed cell wide connections. (#1202 partial) [Mike Popoloski] * 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. Verilator 3.910 2017-09-07 ========================== **Major:** * SystemPerl mode (-sp-deprecated) has been removed. **Minor:** * Update keyword warnings to include C++11 and others. Verilator 3.908 2017-08-28 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * Add -FI option to force includes. (#1916) [Amir Gonnen] * Add --relative-includes. [Rob Stoddard] **Minor:** * 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 ========================== **Major:** * Internal code changes for improved compatibility and performance. **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * Support foreach. (#1078) [Xuan Guo] **Minor:** * 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] * Improve Verilation performance on internal strings. (#1896) [Johan Bjork] * Improve Verilation performance on trace duplicates. (#1090) [Johan Bjork] * Fix SystemC compiles with VPI. (#1081) [Arthur Kahlich] * Fix error on wide numbers that represent shifts, msg1991. (#1088) [Mandy Xu] Verilator 3.886 2016-07-30 ========================== **Minor:** * 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 ========================== **Major:** * Support parameter type. (#376) [Alan Hunter, et al] * Support command-line -G/+pvalue param overrides. (#1045) [Stefan Wallentowitz] * Add --l2-name option for controlling "v" naming. * The default l2 scope name is now the same as the top-level module. (#1050) Use "--l2-name v" for the historical behavior. **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * 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] **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * 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. **Minor:** * 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 ========================== **Minor:** * 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) [Clifford 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * 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] **Minor:** * Add --no-trace-params. * Add assertions on 'unique if'. (#725) [Jeff Bush] * Add PINCONNECTEMPTY warning. [Holger Waechtler] * Support parameter arrays. (#683) [Jeremy Bennett] * Documentation fixes. (#723) [Glen Gibb] * Support {} in always sensitivity lists. (#745) [Igor Lesik] * Fix begin_keywords "1800+VAMS". (#1806) * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * Add --no-order-clock-delay to work around #613. [Charlie Brej] Verilator 3.852 2013-09-29 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * Support interfaces and modports. (#102) [Byron Bradley, Jeremy Bennett] **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * 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] **Minor:** * Add duplicate clock gate optimization. (#1772) [Varun Koyyalagunta] Disabled unless -OD or -O3 used, please try it as may get some significant speedups. * Support pattern assignment features. (#616) (#617) (#618) [Ed Lander] * Support bind in $unit. (#602) [Ed Lander] * Support '() sized casts. (#628) [Ed Lander] * Fix wrong dot resolution under inlining. [Art Stamness] * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * Add --savable to support model save/restore. [Jeremy Bennett] **Minor:** * 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 =============================== **Major:** * 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. **Minor:** * 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 ========================== **Minor:** * Support += and -= in standard for loops. (#463) [Alex Solomatnikov] * Fix processing unused parameterized 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 ========================== **Minor:** * 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 ========================== **Major:** * 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] **Minor:** * 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 ========================== **Major:** * With "--language VAMS" support a touch of Verilog AMS. [Holger Waechtler] **Minor:** * 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 ========================== **Minor:** * Fix "always @ (* )". (#403) (#404) [Walter Lavino] * Add ASSIGNIN as suppressible error. [Jeremy Bennett] * Fix 3.823 constructor core dump on Debian. (#401) [Ahmed El-Mahmoudy] Verilator 3.823 2011-10-20 ========================== **Minor:** * 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 ========================== **Minor:** * Fix PowerPC runtime error. (#288) [Ahmed El-Mahmoudy] * Fix internal error on integer casts. (#374) [Chandan Egbert] Verilator 3.820 2011-07-28 ========================== **Minor:** * 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. * Use 'vluint64_t' for SystemC instead of (same sized) 'uint64' for MSVC++. * Fix vpi_register_cb using bad s_cb_data. (#370) [by Thomas Watts] * Fix $display missing leading zeros in %0d. (#367) [Alex Solomatnikov] Verilator 3.813 2011-06-28 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * Report error 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 parameterized 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 ========================== **Major:** * 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] * 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. **Minor:** * When running with VERILATOR_ROOT, optionally find binaries under bin. * Suppress WIDTH warnings when adding/subtracting 1'b1. * The VARHIDDEN warning is now disabled by default, use -Wall to enable. Verilator 3.805 2010-11-02 ========================== **Minor:** * 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 ========================== **Minor:** * Support tracing/coverage of underscore signals. (#280) [by Jason McMullan] * Increase define recursions before error. [Paul Liu] * On core dump, print debug suggestions. * Fix preprocessor \`\` of existing base define. (#283) [Usha Priyadharshini] Verilator 3.803 2010-07-10 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 parameterized defines with empty arguments. Verilator 3.800 2010-02-07 ========================== **Major 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. **Major 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 ========================== **Major:** * Support little endian bit vectors ("reg [0:2] x;"). * Support division and modulus of > 64 bit vectors. [Gary Thomas] **Minor:** * 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 ========================== **Major:** * Add --bbox-sys option to blackbox $system calls. **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * Patching SystemC is no longer required to trace sc_bvs. **Minor:** * Add verilator --pins-uint8 option to use sc_in. * Add verilator -V option, to show verbose version. * Add BLKLOOPINIT error code, and describe --unroll-count. [Jeff Winston] * Support zero-width constants in concatenations. [Jeff Winston] * On WIDTH warnings, show variable name causing error. [Jeff Winston] Verilator 3.711 2009-06-23 ========================== **Minor:** * 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 ========================== **Major:** * Verilator is now licensed under LGPL v3 and/or Artistic v2.0. **Minor:** * `__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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Minor:** * 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 ========================== **Major:** * Support limited 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 coverage_on/_off metacomments to bracket coverage regions. **Minor:** * Support posedge of bit-selected signals. (#45) [Rodney Sinclair] * Optimize two-level shift and and/or trees, +23% on one test. * 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 parameterized 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 ========================== **Minor:** * Support 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 ========================== **Major:** * Support negative bit indexes. [Stephane Laurent] Tracing negative indexes requires latest Verilog-Perl and SystemPerl. **Minor:** * 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 ========================== **Major:** * SystemC uint64_t pins are now the default instead of sc_bv<64>. Use --no-pins64 for backward compatibility. * Support SystemVerilog "cover property" statements. **Minor:** * 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. * Add IMPERFECTSCH warning, disabled by default. * Support coverage under SystemPerl 1.285 and newer. * Support arbitrary characters in identifiers. [Stephane Laurent] * Fix extra evaluation of pure combo blocks in SystemC output. * Fix stack overflow on large ? : trees. [John Sanguinetti] Verilator 3.670 2008-07-23 ========================== **Major:** * 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. **Minor:** * Add $feof, $fgetc, $fgets, $fflush, $fscanf, $sscanf. [Holger Waechtler] * Add $stime. [Holger Waechtler] * Add $random. * Add --Wfuture-, for improving forward compatibility. * Add WIDTH warning to $fopen etc file descriptors. * 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] Verilator 3.665 2008-06-25 ========================== **Minor:** * 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 ========================== **Minor:** * Fix missing file in kit. Verilator 3.663 2008-05-07 ========================== **Minor:** * 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 parameterized defines calling define with comma. [Joshua Wise] * Fix comma separated list of primitives. [by Bryan Brady] Verilator 3.662 2008-04-25 ========================== **Minor:** * Add Verilog 2005 $clog2() function. This is useful in calculating bus-widths from parameters. * Support C-style 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 parameterized defines. Verilator 3.661 2008-04-04 ========================== **Major:** * 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] **Minor:** * 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 ========================== **Minor:** * Support 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 ========================== **Minor:** * Fix unistd compile error in 3.657. [Patricio Kaplan, Jonathan Kimmitt] Verilator 3.657 2008-02-20 ========================== **Minor:** * Fix assignments of {a,b,c} = {c,b,a}. [Jonathan Kimmitt] * Fix Perl warning with --lint-only. [by Ding Xiaoliang] * Fix to avoid creating obj_dir with --lint-only. [Ding Xiaoliang] * Fix parsing of always @(*). [Patricio Kaplan] Verilator 3.656 2008-01-18 ========================== **Minor:** * 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. * Fix sign error when extracting from signed memory. [Peter Debacker] * Fix tracing of SystemC w/o SystemPerl. [Bernard Deadman, Johan Wouters] Verilator 3.655 2007-11-27 ========================== **Minor:** * Support "#delay ;" with associated STMTDLY warning. * Fix generate for loops with constant zero conditions. [Rodney Sinclair] * Fix divide-by-zero errors in constant propagator. [Rodney Sinclair] * Fix wrong result with obscure signed-shift underneath a "? :". * Fix many internal memory leaks, and added leak detector. Verilator 3.654 2007-10-18 ========================== **Minor:** * Don't exit early if many warnings but no errors are found. [Stan Mayer] * Fix parsing module #(parameter x,y) declarations. [Oleg Rodionov] * Fix parsing system functions with empty parens. [Oleg Rodionov] Verilator 3.653 2007-08-01 ========================== **Minor:** * Support SystemVerilog ==? and !=? operators. * Fix SC_LIBS missing from generated makefiles. [Ding Xiaoliang] Verilator 3.652 2007-06-21 ========================== **Minor:** * 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. * Fix preprocessor dropping some `line directives. [Mark Nodine] Verilator 3.651 2007-05-22 ========================== **Major:** * Add verilator_profcfunc utility. [Gene Weber] **Minor:** * 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. * Fix empty case/endcase blocks. Verilator 3.650 2007-04-20 ========================== **Major:** * 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. **Minor:** * 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] * Fix compile errors under Windows MINGW compiler. [Gerald Williams] * Fix dotted bit reference to local memory. [Eugene Weber] * Fix 3.640 `verilog forcing IEEE 1364-1995 only. [David Hewson] Verilator 3.640 2007-03-12 ========================== **Minor:** * 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] * Fix elimination of public signals assigned to constants. [Eugene Weber] * Fix internal error when public for loop has empty body. [David Addison] * Fix "Loops detected" assertion when model exceeds 4GB. [David Hewson] * Fix display %m names inside named blocks. Verilator 3.633 2007-02-07 ========================== **Minor:** * Add --trace-depth option for minimizing VCD file size. [Emerson Suguimoto] * With VL_DEBUG, show wires causing convergence errors. [Mike Shinkarovsky] * Fix isolate_assignments when many signals per always. [Mike Shinkarovsky] * Fix isolate_assignments across task/func temporaries. [Mike Shinkarovsky] * Fix $display's with array select followed by wide AND. [David Hewson] Verilator 3.632 2007-01-17 ========================== **Minor:** * Add /*verilator isolate_assignments*/ attribute. [Mike Shinkarovsky] Verilator 3.631 2007-01-02 ========================== **Major:** * Support standard NAME[#] for cells created by arraying or generate for. This replaces the non-standard name__# syntax used in earlier versions. **Minor:** * Fix 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. * Fix $readmem* with filenames < 8 characters. [Emerson Suguimoto] Verilator 3.630 2006-12-19 ========================== **Major:** * Support $readmemb and $readmemh. [Eugene Weber, Arthur Kahlich] **Minor:** * When dotted signal lookup fails, help the user by showing known scopes. * Fix to reduce depth of priority encoded case statements. [Eugene Weber] * Fix configure and compiling under Solaris. [Bob Farrell] * Fix dotted references inside generated cells. [David Hewson] * Fix missed split optimization points underneath other re-split blocks. Verilator 3.623 2006-12-05 ========================== **Major:** * Add --output-split-cfuncs for accelerating GCC compile. [Eugene Weber] **Minor:** * Add M32 make variable to support -m32 compiles. [Eugene Weber] * Fix $signed mis-extending when input has a WIDTH violation. [Eugene Weber] Verilator 3.622 2006-10-17 Stable ================================= **Minor:** * Fix --skip-identical without --debug, broken in 3.621. [Andy Meier] Verilator 3.621 2006-10-11 Beta =============================== **Major:** * Add /*verilator no_inline_task*/ to prevent over-expansion. [Eugene Weber] **Minor:** * Public functions now allow > 64 bit arguments. * Remove .vpp intermediate files when not under --debug. * Fix link error when using --exe with --trace. [Eugene Weber] * Fix mis-optimization of wide concats with constants. * Fix core dump on printing error when not under --debug. [Allan Cochrane] Verilator 3.620 2006-10-04 Stable ================================= **Minor:** * 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.) * Fix coredump when dotted cross-ref inside task call. [Eugene Weber] * Fix dotted variables in always sensitivity lists. [Allan Cochrane] Verilator 3.610 2006-09-20 Stable ================================= **Minor:** * 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. * Fix DOS carriage returns in multiline defines. [Ralf Karge] * Fix printf format warnings on 64-bit linux. Verilator 3.602 2006-09-11 Stable ================================= **Minor:** * Fix function references under top inlined module. [David Hewson] Verilator 3.601 2006-09-06 Beta =============================== **Major:** * Add --inhibit-sim flag for environments using old __Vm_inhibitSim. * Add `systemc_dtor for destructor extensions. [Allan Cochrane] * Add -MP to make phony dependencies, ala GCC's. **Minor:** * Changed how internal functions are invoked to reduce aliasing. Useful when using GCC's -O2 or -fstrict-aliasing, to gain another ~4%. * Declare optimized lookup tables as 'static', to reduce D-Cache miss rate. * Fix memory leak when destroying modules. [John Stroebel] * Fix coredump when unused modules have unused cells. [David Hewson] * Fix 3.600 internal error with arrayed instances. [David Hewson] * Fix 3.600 internal error with non-unrolled function loops. [David Hewson] * Fix $display %m name not matching Verilog name inside SystemC modules. Verilator 3.600 2006-08-28 Beta =============================== **Major:** * Support dotted cross-hierarchy variable and task references. **Minor:** * Lint for x's in generate case statements. * Fix line numbers being off by one when first file starts with newline. * Fix naming of generate for blocks to prevent non-inline name conflict. * Fix redundant statements remaining after table optimization. Verilator 3.542 2006-08-11 Stable ================================= **Minor:** * vl_finish and vl_fatal now print via VL_PRINTF rather then cerr/cout. * Fix extraneous UNSIGNED warning when comparing genvars. [David Hewson] * Fix extra white space in $display %c. [by David Addison] * Fix missing VL_CONST_W_24X macro. [Bernard Deadman] Verilator 3.541 2006-07-05 Beta =============================== **Minor:** * Add warning on changeDetect to arrayed structures. [David Hewson] * Fix "// verilator lint_on" not re-enabling warnings. [David Hewson] * Fix 3.540's multiple memory assignments to same block. [David Hewson] * Fix non-zero start number for arrayed instantiations. [Jae Hossell] * Fix GCC 4.0 header file warnings. Verilator 3.540 2006-06-27 Beta =============================== **Minor:** * Optimize combo assignments that are used only once, ~5-25% faster. * Optimize delayed assignments to memories inside loops, ~0-5% faster. * Fix mis-width warning on bit selects of memories. [David Hewson] * Fix mis-width warning on dead generate-if branches. [Jae Hossell] Verilator 3.533 2006-06-05 Stable ================================= **Minor:** * Add PDF user manual, verilator.pdf. * Fix delayed bit-selected arrayed assignments. [David Hewson] * Fix execution path to Perl. [Shanshan Xu] * Fix Bison compile errors in verilog.y. [by Ben Jackson] Verilator 3.531 2006-05-10 Stable ================================= **Minor:** * Support $c routines which return 64 bit values. * Fix `include `DEFINE. * Fix Verilator core dump when have empty public function. [David.Hewson] Verilator 3.530 2006-04-24 Stable ================================= **Major:** * $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 ================================= **Minor:** * Fix error line numbers being off due to multi-line defines. [Mat Zeno] * Fix GCC sign extending (uint64_t)(a>>, $signed, $unsigned. [MANY!] * Support multi-dimensional arrays. [Eugen Fekete] * Support very limited 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. **Minor:** * Fix generate if's with empty if/else blocks. [Mat Zeno] * Fix generate for cell instantiations with same name. [Mat Zeno] Verilator 3.481 2005-10-12 Stable ================================= **Minor:** * Add /*verilator tracing_on/off*/ for waveform control. * Fix split optimization reordering $display statements. Verilator 3.480 2005-09-27 Beta =============================== **Major:** * Allow coverage of flattened modules, and multiple points per line. Coverage analysis requires SystemPerl 1.230 or newer. **Minor:** * 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 ================================= **Minor:** * Optimize staging flops under reset blocks. * Add '-Werror-...' to upgrade specific warnings to errors. * Add GCC branch prediction hints on generated if statements. * Fix bad simulation when same function called twice in same expression. * Fix preprocessor substitution of quoted parameterized defines. Verilator 3.464 2005-08-24 Stable ================================= **Major:** * Add `systemc_imp_header, for use when using --output-split. * Add --stats option to dump design statistics. **Minor:** * Fix core dump with clock inversion optimizations. Verilator 3.463 2005-08-05 Stable ================================= **Minor:** * Fix case defaults when not last statement in case list. [Wim Michiels] Verilator 3.462 2005-08-03 Stable ================================= **Minor:** * Fix reordering of delayed assignments to same memory index. [Wim Michiels] * Fix compile error with Flex 2.5.1. [Jens Arm] * Fix multiply-instantiated public tasks generating non-compilable code. Verilator 3.461 2005-07-28 Beta =============================== **Minor:** * Fix compile error with older versions of bison. [Jeff Dutton] Verilator 3.460 2005-07-27 Beta =============================== **Major:** * 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. **Minor:** * When issuing unoptimizable warning, show an example path. * Internal tree dumps now indicate edit number that changed the node. * Fix false warning when a clock is constant. * Fix X/Z in decimal numbers. [Wim Michiels] * Fix genvar statements in non-named generate blocks. * Fix core dump when missing newline in `define. [David van der bokke] Verilator 3.450 2005-07-12 ========================== **Major:** * $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 an exit condition for their loop, and then call top->final(). To prevent an infinite loop, a double $finish will still exit; this may be removed in future releases. * Support SystemVerilog keywords $bits, $countones, $isunknown, $onehot, $onehot0, always_comb, always_ff, always_latch, finish. **Minor:** * Fix "=== 1'bx" to always be false, instead of random. Verilator 3.440 2005-06-28 Stable ================================= **Major:** * Add Verilog 2001 generate for/if/case statements. Verilator 3.431 2005-06-24 Stable ================================= **Minor:** * Fix selection bugs introduced in 3.430 beta. Verilator 3.430 2005-06-22 Beta =============================== **Minor:** * Add Verilog 2001 variable part selects [n+:m] and [n-:m]. [Wim Michiels] Verilator 3.422 2005-06-10 Stable ================================= **Minor:** * Add Verilog 2001 power (**) operator. [Danny Ding] * Fix crash and added error message when assigning to inputs. [Ralf Karge] * Fix tracing of modules with public functions. Verilator 3.421 2005-06-02 Beta =============================== **Minor:** * Fix error about reserved word on non-public signals. * Fix missing initialization compile errors in 3.420 beta. [Ralf Karge] Verilator 3.420 2005-06-02 Beta =============================== **Minor:** * Performance improvements worth ~20% * Add -x-assign options; ~5% faster if use -x-assign=0. * Add error message when multiple defaults in case statement. * Optimize shifts out of conditionals and if statements. * Optimize local 'short' wires. * Fix case defaults when not last statement in case list. [Ralf Karge] * Fix crash when wire self-assigns x=x. * Fix gate optimization with top-flattened modules. [Mahesh Kumashikar] Verilator 3.411 2005-05-30 Stable ================================= **Minor:** * Fix compile error in GCC 2.96. [Jeff Dutton] Verilator 3.410 2005-05-25 Beta =============================== **Major:** * 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. **Minor:** * 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. * Fix internal error in V3Table. [Jeff Dutton] * Fix compile error in GCC 2.96, and with SystemC 1.2. [Jeff Dutton] Verilator 3.400 2005-04-29 Beta =============================== **Major:** * 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. * Add --sc to create pure SystemC output not requiring SystemPerl. * Add --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. * Add -O3 and --inline-mult for performance tuning. [Ralf Karge] One experiment regained 5% performance, at a cost of 300% in compile time. **Minor:** * Improved performance of large case/always statements with low fanin by converting to internal lookup tables (ROMs). * Initialize SystemC port names. [S Shuba] * Add Doxygen comments to Verilated includes. * Fix -cc pins 8 bits wide and less to be uint8_t instead of uint16_t. * Fix crash when Mdir has same name as .v file. [Gernot Koch] * Fix crash with size mismatches on case items. [Gernot Koch] Verilator 3.340 2005-02-18 Stable ================================= **Minor:** * Report misconnected pins across all modules, instead of just first error. * Improved large netlist compile times. * Fix over-active inlining, resulting in compile slowness. Verilator 3.332 2005-01-27 ========================== **Major:** * Add -E preprocess only flag, similar to GCC. * Add CMPCONSTLR when comparison is constant due to > or < with all ones. **Minor:** * Fix loss of first -f file argument, introduced in 3.331. Verilator 3.331 2005-01-18 ========================== **Major:** * The Verilog::Perl preprocessor is now C++ code inside of Verilator. This improves performance, makes compilation easier, and enables some future features. **Minor:** * Support arrays of instantiations (non-primitives only). [Wim Michiels] * Fix unlinked error with defparam. [Shawn Wang] Verilator 3.320 2004-12-10 ========================== **Major:** * 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. **Minor:** * Add new COMBDLY warning in place of fatal error. [Shawn Wang] * Fix mis-simulation with wide-arrays under bit selects. [Ralf Karge] * Add 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.) * Fix compile warnings on Suse 9.1 Verilator 3.311 2004-11-29 ========================== **Major:** * Support implicit wire declarations (as a warning). [Shawn Wang] **Minor:** * Fix over-shift difference in Verilog vs C++. [Ralf Karge] Verilator 3.310 2004-11-15 ========================== **Major:** * Support defparam. * Support gate primitives: buf, not, and, nand, or, nor, xor, xnor. **Minor:** * Ignore all specify blocks. Verilator 3.302 2004-11-12 ========================== **Minor:** * Support NAND and NOR operators. * Better warnings when port widths don't match. * Fix internal error due to some port width mismatches. [Ralf Karge] * Fix WIDTH warnings on modules that are only used parameterized, not in 'default' state. * Fix selection of SystemC library on cygwin systems. [Shawn Wang] * Fix runtime bit-selection of parameter constants. Verilator 3.301 2004-11-04 ========================== **Minor:** * Fix 64 bit [31:0] = {#{}} mis-simulation. [Ralf Karge] * Fix shifts greater then word width mis-simulation. [Ralf Karge] * Fix to work around GCC 2.96 negation bug. Verilator 3.300 2004-10-21 ========================== **Major:** * 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. **Minor:** * Fix "setting unsigned int from signed value" warning. Verilator 3.271 2004-10-21 ========================== **Minor:** * Fix "loops detected" error with some negedge clocks. * Fix some output code spacing issues. Verilator 3.270 2004-10-15 ========================== **Minor:** * Support Verilog 2001 parameters in module headers. [Ralf Karge] * Faster code to support compilers not inlining all Verilated functions. * Fix numeric fault when dividing by zero. Verilator 3.260 2004-10-07 ========================== **Major:** * Support Verilog 2001 named parameter instantiation. [Ralf Karge] **Minor:** * Return 1's when one bit wide extract indexes outside array bounds. * Fix compile warnings on 64-bit operating systems. * Fix incorrect dependency in .d file when setting VERILATOR_BIN. Verilator 3.251 2004-09-09 ========================== **Minor:** * Fix parenthesis overflow in Microsoft Visual C++ [Renga Sundararajan] Verilator 3.250 2004-08-30 ========================== **Major:** * Support Microsoft Visual C++ [Renga Sundararajan] **Minor:** * SystemPerl 1.161+ is required. Verilator 3.241 2004-08-17 ========================== **Minor:** * Support ,'s to separate multiple assignments. [Paul Nitza] * Fix shift sign extension problem using non-GCC compilers. Verilator 3.240 2004-08-13 ========================== **Major:** * 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. **Minor:** * Fix SystemC compile error with feedthrus. [Paul Nitza] * Fix concat value error introduced in 3.230. Verilator 3.230 2004-08-10 ========================== **Minor:** * Add coverage output to test_sp example, SystemPerl 1.160+ is required. * Fix time 0 value of signals. [Hans Van Antwerpen] Earlier versions would not evaluate some combinatorial signals until posedge/negedge blocks had been activated. * Fix wide constant inputs to public submodules [Hans Van Antwerpen] * Fix wide signal width extension bug. Only applies when width mismatch warnings were overridden. Verilator 3.220 2004-06-22 ========================== **Major:** * Many waveform tracing changes: * Tracing is now supported on C++ standalone simulations. [John Brownlee] **Minor:** * When tracing, SystemPerl 1.150 or newer is required. * When tracing, Verilator must be called with the --trace switch. * Add SystemPerl example to documentation. [John Brownlee] * Various Cygwin compilation fixes. [John Brownlee] Verilator 3.210 2004-04-01 ========================== **Major:** * Compiler optimization switches have changed See the BENCHMARKING section of the documentation. * With Verilog-Perl 2.3 or newer, Verilator supports SystemVerilog preprocessor extensions. **Minor:** * Add localparam. [Thomas Hawkins] * Add warnings for SystemVerilog reserved words. Verilator 3.203 2004-03-10 ========================== **Minor:** * Notes and repairs for Solaris. [Fred Ma] Verilator 3.202 2004-01-27 ========================== **Major:** * 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. **Minor:** * Optimize common replication operations. * Fix several tracing bugs Verilator 3.201-beta 2003-12-10 =============================== **Major:** * BETA VERSION, USE 3.124 for stable release! * Version 3.2XX includes an 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 ========================== **Minor:** * Optimize bit replications Verilator 3.124 2003-12-05 ========================== **Major:** * An optimized executable will be made by default, in addition to a debug executable. Invoking Verilator with --debug will pick the debug version. **Minor:** * Many minor invisible changes to support the next version. Verilator 3.123 2003-11-10 ========================== **Minor:** * Wide bus performance enhancements. * Fix function call bug when width warning suppressed. [Leon Wildman] * Fix __DOT__ compile problem with funcs in last revision. [Leon Wildman] Verilator 3.122 2003-10-29 ========================== **Major:** * 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. **Minor:** * Fix replicated function calls in one statement. [Robert A. Clark] * Fix function call bug when width warning suppressed. [Leon Wildman] Verilator 3.121 2003-09-29 ========================== **Minor:** * 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. * Fix width problems on function arguments. [Robert A. Clark] Verilator 3.120 2003-09-24 ========================== **Minor:** * $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] * Optimize reduction operators. * Fix converting "\ooo" into octal values. * Fix $display("%x"); Verilator 3.112 2003-09-16 ========================== **Minor:** * Fix functions in continuous assignments. [Robert A. Clark] * Fix inlining of modules with 2-level deep outputs. Verilator 3.111 2003-09-15 ========================== **Minor:** * Fix declaration of functions before using that module. [Robert A. Clark] * Fix module inlining bug with outputs. Verilator 3.110 2003-09-12 ========================== **Major:** * Support Verilog 2001 style input/output declarations. [Robert A. Clark] * Support local vars in headers of function/tasks. [Leon Wildman] Verilator 3.109 2003-08-28 ========================== **Major:** * Support local variables in named begin blocks. [Leon Wildman] Verilator 3.108 2003-08-11 ========================== **Major:** * Support functions. **Minor:** * 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. * Optimize conditionals (?:) Verilator 3.107 2003-07-15 ========================== **Major:** * --private and --l2name are now the default, as this enables additional optimizations. Use --noprivate or --nol2name to get the older behavior. **Minor:** * Now support $display of binary and wide format data. * Add detection of incomplete case statements, and added related optimizations worth ~4%. * Work around flex bug in Redhat 8.0. [Eugene Weber] * Add some additional C++ reserved words. * Additional constant optimizations, ~5% speed improvement. Verilator 3.106 2003-06-17 ========================== **Major:** * $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. * Add --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. **Minor:** * Several cleanups for Redhat 8.0. Verilator 3.105 2003-05-08 ========================== **Minor:** * Fix more GCC 3.2 errors. [David Black] Verilator 3.104 2003-04-30 ========================== **Major:** * Indicate direction of ports with VL_IN and VL_OUT. * Allow $c32, etc, to specify width of the $c statement for VCS. * Numerous performance improvements, worth about 25% **Minor:** * Fix false "indent underflow" error inside `systemc_ctor sections. * Fix missing ordering optimizations when outputs also used internally. * Assign constant cell pins in initial blocks rather then every cycle. * Promote subcell's combo logic to sequential evaluation when possible. * Fix GCC 3.2 compile errors. [Narayan Bhagavatula] Verilator 3.103 2003-01-28 ========================== **Minor:** * Fix missing model evaluation when clock generated several levels of hierarchy across from where it is used as a clock. [Richard Myers] * Fix sign-extension bug introduced in 3.102. Verilator 3.102 2003-01-24 ========================== **Minor:** * Fix sign-extension of X/Z's ("32'hx") Verilator 3.101 2003-01-13 ========================== **Minor:** * Fix 'parameter FOO=#'bXXXX' [Richard Myers] * Allow spaces inside numbers ("32'h 1234") [Sam Gladstone] Verilator 3.100 2002-12-23 ========================== **Major:** * Support for simple tasks w/o vars or I/O. [Richard Myers] **Minor:** * Ignore DOS carriage returns in Linux files. [Richard Myers] Verilator 3.012 2002-12-18 ========================== **Minor:** * Fix parsing bug with casex statements containing case items with bit extracts of parameters. [Richard Myers] * Fix bug which could cause writes of non-power-of-2 sized arrays to corrupt memory beyond the size of the array. [Dan Lussier] * Fix bug which did not detect UNOPT problems caused by submodules. See the description in the verilator man page. [John Deroo] * Fix compile with threaded Perl. [Ami Keren] Verilator 3.010 2002-11-03 ========================== **Major:** * Support SystemC 2.0.1. SystemPerl version 1.130 or newer is required. **Minor:** * Fix bug with inlined modules under other inlined modules. [Scott Bleiweiss] Verilator 3.005 2002-10-21 ========================== **Minor:** * Fix X's in case (not casex/z) to constant propagate correctly. * Fix missing include. [Kurachi] Verilator 3.004 2002-10-10 ========================== **Minor:** * Add module_inline metacomment and associated optimizations. * Allow coverage_block_off metacomment in place of `coverage_block_off. This prevents problems with Emacs AUTORESET. [Ray Strouble] * Fix `coverage_block_off also disabling subsequent blocks. * Fix unrolling of loops with multiple simple statements. * Fix compile warnings on newer GCC. [Kurachi] * Additional concatenation optimizations. Verilator 3.003 2002-09-13 ========================== **Minor:** * Now compiles on Windows 2000 with Cygwin. * Fix bug with pin assignments to wide memories. * Optimize wire assignments to constants. Verilator 3.002 2002-08-19 ========================== **Major:** * First public release of version 3. Verilator 3.000 2002-08-03 ========================== **Major:** * All new code base. Many changes too numerous to mention. **Minor:** * Approximately 4 times faster then Verilator 2. * Support initial statements * Support correct blocking/nonblocking assignments * Support `defines across multiple modules * Optimize call ordering, constant propagation, and dead code elimination. Verilator 2.1.8 2002-04-03 ========================== **Major:** * All applications must now link against include/verilated.cpp **Minor:** * 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. * Add warning when parameter constants are too large. [John Deroo] * Add warning when x/?'s used in non-casez statements. * Add 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 ========================== **Major:** * Add 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. **Minor:** * Relaxed multiply range checking * Support for constants up to 128 bits * Randomize values used when assigning to X's. * Add -guard option of internal testing. * Changed indentation in emitted code to be automatically generated. * Fix corruption of assignments of signal over 32 bits with non-0 lsb. Verilator 2.1.4 2001-11-16 ========================== **Major:** * Add $c("c_commands();"); for embedding arbitrary C code in Verilog. Verilator 2.1.3 2001-11-03 ========================== **Major:** * Support for parameters. Verilator 2.1.2 2001-10-25 ========================== **Major:** * Verilog Errors now reference the .v file rather then the .vpp file. **Minor:** * 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. * Fix bug where a==b==c would have wrong precedence rule. * Fix bug where XNOR on odd-bit-widths (~^ or ^~) had bad value. Verilator 2.1.1 2001-05-17 ========================== **Major:** * 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) **Minor:** * 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 ========================== **Minor:** * 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] * Fix 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 ======================== * Add fasttrace script Verilator 1.5 1996-01-09 ======================== * Pass structure pointer into translated code, so multiple instances can use same functions. * Fix 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. .. ---------------------------------------------------------------------- Copyright ========= Copyright 2001-2023 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