Verilator

==========================

**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). [Kuoping 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).

==========================

**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]

==========================

**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]

==========================

**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]

==========================

**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). [Àlex 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). [Àlex 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]

==========================

**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]