Version bump

Internals: Cleanup unused nodep in visitors. No functional change intended.
Cleanup misc clang-tidy warnings. No functional change intended
2026-10-03 08:33:21 +02:00 · 2020-04-04 08:40:47 -04:00 · 2020-04-04 08:31:14 -04:00 · 2020-04-03 22:31:54 -04:00 · 2020-04-03 20:08:24 -04:00 · 2020-04-03 20:07:46 -04:00
2849 changed files with 20064 additions and 10548 deletions
@@ -1,8 +1,10 @@
 # DESCRIPTION: Travis-CI config
 #
-# Copyright 2003-2019 by Todd Strader. Verilator 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.
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

 version: ~> 1.0

@@ -25,7 +27,8 @@ cache:

 before_install:
 # Perl modules needed for testing
-  - yes yes | sudo cpan -fi Unix::Processors Parallel::Forker Bit::Vector
+# Not listing Bit::Vector as slow to install, and only skips one test
+  - yes yes | sudo cpan -fi Unix::Processors Parallel::Forker
  - sudo apt-get install gdb gtkwave
  - sudo apt-get install libgoogle-perftools-dev
 before_script:
@@ -58,9 +61,14 @@ jobs:
      script: ci/test.sh vlt
    - if: type != cron
      stage: test
-      name: Vltmt test
+      name: Vltmt set 0 test
      compiler: gcc
-      script: ci/test.sh vltmt
+      script: ci/test.sh vltmt0
+    - if: type != cron
+      stage: test
+      name: Vltmt set 1 test
+      compiler: gcc
+      script: ci/test.sh vltmt1
 # Cron builds try different OS/compiler combinations
    - if: type = cron
      stage: "Build Verilator"
@@ -3,6 +3,58 @@ Revision history for Verilator
 The contributors that suggested a given feature are shown in []. Thanks!


+* Verilator 4.032 2020-04-04
+
+***   Add column numbers to errors and warnings.
+
+***   Add GCC 9-style line number prefix when showing source text for errors.
+
+***   Add setting VM_PARALLEL_BUILDS=1 when using --output-split, #2185.
+
+***   Change --quiet-exit to also suppress 'Exiting due to N errors'.
+
+****  Suppress REALCVT for whole real numbers.
+
+****  Support split_var in vlt files, #2219. [Marco Widmer]
+
+****  Fix parameter type redeclaring a type, #2195. [hdzhangdoc]
+
+****  Fix VCD open with empty filename, #2198. [Julius Baxter]
+
+****  Fix packages as enum base types, #2202. [Driss Hafdi]
+
+****  Fix duplicate typedefs in generate for, #2205. [hdzhangdoc]
+
+****  Fix MinW portability, #2114. [Sean Cross]
+
+****  Fix assertions with unique case inside, #2199. [hdzhangdoc]
+
+****  Fix implicit conversion of floats to wide integers.
+
+
+* Verilator 4.030 2020-03-08
+
+**    Add split_var metacomment to assist UNOPTFLAT fixes, #2066. [Yutetsu TAKATSUKASA]
+
+**    Add support for $dumpfile and $dumpvars, #2126. [Alexander Grobman]
+
+**    Add support for dynamic arrays, #379.
+
+***   Add +verilator+noassert flag to disable assertion checking. [Tobias Wölfel]
+
+***   Add check for assertOn for asserts, #2162. [Tobias Wölfel]
+
+***   Add --structs-packed for forward compatibility.
+
+***   Fix genblk naming with directly nested generate blocks, #2176. [Alexander Grobman]
+
+****  Implement $displayb/o/h, $writeb/o/h, etc, #1637.
+
+****  Use gcc -Os in examples instead of -O2 for better average performance.
+
+****  Fix undeclared VL_SHIFTR_WWQ, #2114. [Alex Solomatnikov]
+
+
 * Verilator 4.028 2020-02-08

 **    Support attributes (public, isolate_assignments, etc.) in configuration files.
@@ -45,6 +97,8 @@ The contributors that suggested a given feature are shown in []. Thanks!

 ****  Fix OpenSolaris issues, #2154. [brancoliticus]

+****  Fix gated clocks under --protect-lib, #2169. [Todd Strader]
+

 * Verilator 4.026 2020-01-11

@@ -3513,10 +3567,11 @@ of input ports exists for tracing.

 This uses outline mode in Emacs.  See C-h m [M-x describe-mode].

-Copyright 2001-2020 by Wilson Snyder.  This program is free software; you
+Copyright 2001-2020 by Wilson Snyder. This program is free software; you
 can redistribute it and/or modify it under the terms of either the GNU
 Lesser General Public License Version 3 or the Perl Artistic License
 Version 2.0.
+SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

 Local variables:
 mode: outline
@@ -28,7 +28,7 @@
 /obj_vcs/
 /obj_vlt/
 /obj_vltmt/
-/INCA_libs/
+INCA_libs/
 /cov_work/
 /logs/
 ^Makefile$
@@ -37,6 +37,7 @@ bin/verilator_bin.*
 bin/verilator_coverage_bin.*
 docs/.*\.html$
 docs/Makefile$
+docs/clang-format.txt$
 docs/doxygen-doc/.*
 examples/xml_py/copied/
 examples/xml_py/graph.*
@@ -7,15 +7,11 @@
 #
 #*****************************************************************************
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
-#
-# Verilator is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 #****************************************************************************/
 #
@@ -208,12 +204,6 @@ EXAMPLES_FIRST = \

 EXAMPLES = $(EXAMPLES_FIRST) $(filter-out $(EXAMPLES_FIRST), $(sort $(wildcard examples/*)))

-ifeq ($(OBJCACHE_JOBS),)
-ifneq ($(OBJCACHE_HOSTS),)
-export OBJCACHE_JOBS := -j $(shell objcache --jobs "$(OBJCACHE_HOSTS)")
-endif
-endif
-
 # See uninstall also - don't put wildcards in this variable, it might uninstall other stuff
 VL_INST_MAN_FILES = verilator.1 verilator_coverage.1 verilator_gantt.1 verilator_profcfunc.1

@@ -25,7 +25,7 @@ endif::[]
 ^.^| *Welcome to Verilator, the fastest free Verilog HDL simulator.*
 +++ <br/> +++ &bullet; Accepts synthesizable Verilog or SystemVerilog
 +++ <br/> +++ &bullet; Performs lint code-quality checks
-+++ <br/> +++ &bullet; Compiles into multithreaded {cpp}, SystemC, or (soon) {cpp}-under-Python
+++ <br/> +++ &bullet; Compiles into multithreaded {cpp}, or SystemC
 +++ <br/> +++ &bullet; Creates XML to front-end your own tools
 <.^|image:https://www.veripool.org/img/verilator_256_200_min.png[Logo,256,200]

@@ -81,7 +81,7 @@ touch of {cpp} code, Verilator is the tool for you.
 Verilator does not simply convert Verilog HDL to {cpp} or SystemC.  Rather
 than only translate, Verilator compiles your code into a much faster
 optimized and optionally thread-partitioned model, which is in turn wrapped
-inside a {cpp}/SystemC/Python module.  The results are a compiled Verilog
+inside a {cpp}/SystemC/{cpp}-under-Python module.  The results are a compiled Verilog
 model that executes even on a single-thread over 10x faster than standalone
 SystemC, and on a single thread is about 100 times faster than interpreted
 Verilog simulators such as http://iverilog.icarus.com[Icarus
@@ -5,11 +5,7 @@
 # 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.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -421,6 +417,7 @@ more information.
     +verilator+prof+threads+window+I<value>   Set profile duration
     +verilator+rand+reset+I<value>    Set random reset technique
     +verilator+seed+I<value>          Set random seed
+     +verilator+noassert               Disable assert checking
     +verilator+V                      Verbose version and config
     +verilator+version                Show version and exit

@@ -1082,8 +1079,8 @@ and the remaining files can be compiled on parallel machines.  Using
 design --output-split 20000 resulted in splitting into approximately
 one-minute-compile chunks.

-Typically when using this, make with VM_PARALLEL_BUILDS=1, and use
-I<ccache>.
+Typically when using this, make with VM_PARALLEL_BUILDS=1 (set for you if
+using the default makefiles), and use I<ccache>.

 =item --output-split-cfuncs I<statements>

@@ -1272,7 +1269,8 @@ detailed description.

 =item --quiet-exit

-When exiting due to an error, do not display the "Command Failed" message.
+When exiting due to an error, do not display the "Exiting due to Errors"
+nor "Command Failed" messages.

 =item --relative-includes

@@ -1343,6 +1341,13 @@ Creates more detailed statistics, including a list of all the variables by
 size (plain --stats just gives a count).  See --stats, which is implied by
 this.

+=item --structs-packed
+
+Converts all unpacked structures to packed structures and issues a UNPACKED
+warning.  Currently this is the default and --no-structs-packed will not
+work.  Specifying this option allows for forward compatibility when a
+future version of Verilator no longer always packs unpacked structures.
+
 =item -sv

 Specifies SystemVerilog language features should be enabled; equivalent to
@@ -1773,6 +1778,11 @@ For $random and "-x-initial unique", set the simulation runtime random seed
 value.  If zero or not specified picks a value from the system random
 number generator.

+=item +verilator+noassert
+
+Disable assert checking per runtime argument. This is the same as calling
+"Verilated::assertOn(false)" in the model.
+
 =item +verilator+V

 Shows the verbose version, including configuration information.
@@ -1900,13 +1910,13 @@ Now we run Verilator on our little example.

 We then can compile it

-    cd obj_dir
-    make -j -f Vour.mk Vour__ALL.a
-    make -j -f Vour.mk ../sc_main.o verilated.o
+    make -j -C obj_dir -f Vour.mk Vour__ALL.a
+    make -j -C obj_dir -f Vour.mk ../sc_main.o verilated.o

 And link with SystemC.  Note your path to the libraries may vary,
 depending on the operating system.

+    cd obj_dir
    export SYSTEMC_LIBDIR=/path/to/where/libsystemc.a/exists
    export LD_LIBRARY_PATH=$SYSTEMC_LIBDIR:$LD_LIBRARY_PATH
    # Might be needed if SystemC 2.3.0
@@ -1930,6 +1940,39 @@ when your source changes it will automatically run all of these steps.  See
 the examples directory in the distribution.


+=head1 EVALUATION LOOP
+
+When using SystemC, when Verilator is evaluated is managed by the SystemC
+kernel, and for the most part can be ignored.  When using C++, the user
+must call eval(), or eval_step() and eval_end_step().
+
+1. When there is a single design instantiated at the C++ level that need to
+evaluate, just call designp->eval().
+
+2. When there are multiple designs instantiated each at the C++ level that
+need to evaluate, call first_designp->eval_step() then ->eval_step() on all
+other designs.  Then call ->eval_end_step() on the first design then all
+other designs.  If there is only a single design, you would call
+eval_step() then eval_end_step(); in fact eval() described above is just a
+wrapper which calls these two functions.
+
+When eval() is called Verilator looks for changes in clock signals and
+evaluates related sequential always blocks, such as computing always_ff @
+(posedge...) outputs.  Then Verilator evaluates combinatorial logic.
+
+Note combinatorial logic is not computed before sequential always blocks
+are computed (for speed reasons). Therefore it is best to set any non-clock
+inputs up with a separate eval() call before changing clocks().
+
+Alternatively, if all always_ff statements use only the posedge of clocks,
+or all inputs go directly to always_ff statements, as is typical, then you
+can change non-clock inputs on the negative edge of the input clock, which
+will be faster as there will be fewer eval() calls.
+
+For more information on evaluation, see docs/internals.adoc in the
+distribution.
+
+
 =head1 BENCHMARKING & OPTIMIZATION

 For best performance, run Verilator with the "-O3 --x-assign fast
@@ -1958,27 +2001,27 @@ OPT, OPT_FAST, or OPT_SLOW lib/verilated.mk.  Or, use the -CFLAGS and/or
 the compiler or linker.  Or, just for one run, pass them on the command
 line to make:

-    make OPT_FAST="-O2 -fno-stack-protector" -f Vour.mk Vour__ALL.a
+    make OPT_FAST="-Os -fno-stack-protector" -f Vour.mk Vour__ALL.a

 OPT_FAST specifies optimizations for those programs that are part of the
 fast path, mostly code that is executed every cycle.  OPT_SLOW specifies
 optimizations for slow-path files (plus tracing), which execute only
 rarely, yet take a long time to compile with optimization on.  OPT
 specifies overall optimization and affects all compiles, including those
-OPT_FAST and OPT_SLOW control.  For best results, use OPT="-O2", and link
+OPT_FAST and OPT_SLOW control.  For best results, use OPT="-Os", and link
 with "-static".  Nearly the same results can be had with much better
 compile times with OPT_FAST="-O1 -fstrict-aliasing".  Higher optimization
-such as "-O3" may help, but gcc compile times may be excessive under O3 on
-even medium sized designs.  Alternatively, some larger designs report
-better performance using "-Os".
+such as "-O2" or "-O3" may help, but gcc compile times may be excessive
+under O3 on even medium sized designs.

 Unfortunately, using the optimizer with SystemC files can result in
 compiles taking several minutes.  (The SystemC libraries have many little
 inlined functions that drive the compiler nuts.)

-For best results, use GCC 3.3 or newer.  GCC 3.2 and earlier have
-optimization bugs around pointer aliasing detection, which can result in 2x
-performance losses.
+For best results, use the latest clang compiler (about 10% faster than
+GCC).  Note the now fairly old GCC 3.2 and earlier have optimization bugs
+around pointer aliasing detection, which can result in 2x performance
+losses.

 If you will be running many simulations on a single compile, investigate
 feedback driven compilation.  With GCC, using -fprofile-arcs, then
@@ -1989,6 +2032,9 @@ especially if you link in DPI code.  To enable LTO on GCC, pass "-flto" in
 both compilation and link.  Note LTO may cause excessive compile times on
 large designs.

+Using profile driven compiler optimization, with feedback from a real
+design, can yield up to30% improvements.
+
 If you are using your own makefiles, you may want to compile the Verilated
 code with -DVL_INLINE_OPT=inline. This will inline functions, however this
 requires that all cpp files be compiled in a single compiler run.
@@ -1999,7 +2045,7 @@ either oprofile or gprof to see where in the C++ code the time is spent.
 Run the gprof output through verilator_profcfunc and it will tell you what
 Verilog line numbers on which most of the time is being spent.

-When done, please let the author know the results.  I like to keep tabs on
+When done, please let the author know the results.  We like to keep tabs on
 how Verilator compares, and may be able to suggest additional improvements.


@@ -2074,7 +2120,7 @@ After running Make, the C++ compiler may produce the following:

 A generic Linux/OS variable specifying what directories have shared object
 (.so) files.  This path should include SystemC and any other shared objects
-needed at simultion runtime.
+needed at simulation runtime.

 =item OBJCACHE

@@ -2203,7 +2249,7 @@ example:
 Note signals are read and written as member variables of the lower module.
 You call the eval() method to evaluate the model.  When the simulation is
 complete call the final() method to wrap up any SystemVerilog final blocks,
-and complete any assertions.
+and complete any assertions. See L</"EVALUATION LOOP">.


 =head1 CONNECTING TO SYSTEMC
@@ -2806,7 +2852,7 @@ and range of line numbers (or all lines if omitted).
 For tracing_off, cells below any module in the files/ranges specified will
 also not be traced.

-=item clock_enable -module "<modulename>" -signal "<signame>"
+=item clock_enable -module "<modulename>" -var "<signame>"

 Indicate the signal is used to gate a clock, and the user takes responsibility
 for insuring there are no races related to it.
@@ -2814,13 +2860,13 @@ for insuring there are no races related to it.
 Same as /*verilator clock_enable*/, see L</"LANGUAGE EXTENSIONS"> for
 more information and an example.

-=item clocker -module "<modulename>" [-task "<taskname>"] -signal "<signame>"
+=item clocker -module "<modulename>" [-task "<taskname>"] -var "<signame>"

-=item clocker -module "<modulename>" [-function "<funcname>"] -signal "<signame>"
+=item clocker -module "<modulename>" [-function "<funcname>"] -var "<signame>"

-=item no_clocker -module "<modulename>" [-task "<taskname>"] -signal "<signame>"
+=item no_clocker -module "<modulename>" [-task "<taskname>"] -var "<signame>"

-=item no_clocker -module "<modulename>" [-function "<funcname>"] -signal "<signame>"
+=item no_clocker -module "<modulename>" [-function "<funcname>"] -var "<signame>"

 Indicate the signal is used as clock or not. This information is used by
 Verilator to mark the signal as clocker and propagate the clocker attribute
@@ -2862,9 +2908,9 @@ routines will replace the __DOT__ with the period.
 Same as /*verilator inline_module*/, see L</"LANGUAGE EXTENSIONS"> for
 more information.

-=item isolate_assignments -module "<modulename>" [-task "<taskname>"] -signal "<signame>"
+=item isolate_assignments -module "<modulename>" [-task "<taskname>"] -var "<signame>"

-=item isolate_assignments -module "<modulename>" [-function "<funcname>"] -signal "<signame>"
+=item isolate_assignments -module "<modulename>" [-function "<funcname>"] -var "<signame>"

 =item isolate_assignments -module "<modulename>" -function "<fname>"

@@ -2899,9 +2945,9 @@ outside the task itself.
 Same as /*verilator no_inline_task*/, see L</"LANGUAGE EXTENSIONS">
 for more information.

-=item sc_bv -module "<modulename>" [-task "<taskname>"] -signal "<signame>"
+=item sc_bv -module "<modulename>" [-task "<taskname>"] -var "<signame>"

-=item sc_bv -module "<modulename>" [-function "<funcname>"] -signal "<signame>"
+=item sc_bv -module "<modulename>" [-function "<funcname>"] -var "<signame>"

 Sets the port to be of sc_bv<I<width>> type, instead of bool, vluint32_t or
 vluint64_t.  This may be useful if the port width is parameterized and
@@ -2913,9 +2959,9 @@ significantly.
 Same as /*verilator sc_bv*/, see L</"LANGUAGE EXTENSIONS"> for more
 information.

-=item sformat [-module "<modulename>"] [-task "<taskname>"] -signal "<signame>"
+=item sformat [-module "<modulename>"] [-task "<taskname>"] -var "<signame>"

-=item sformat [-module "<modulename>"] [-function "<funcname>"] -signal "<signame>"
+=item sformat [-module "<modulename>"] [-function "<funcname>"] -var "<signame>"

 Final input of a function or task "input string" to indicate the
 function or task should pass all remaining arguments through
@@ -2925,6 +2971,17 @@ behavior.  See the test_regress/t/t_dpi_display.v file for an example.
 Same as /*verilator sformat*/, see L</"LANGUAGE EXTENSIONS"> for more
 information.

+=item split_var [-module "<modulename>"] [-task "<taskname>"] -var "<varname>"
+
+=item split_var [-module "<modulename>"] [-function "<funcname>"] -var "<varname>"
+
+Break the variable into multiple pieces typically to resolve UNOPTFLAT
+performance issues. Typically the variables to attach this to are
+recommeded by Verilator itself, see UNOPTFLAT.
+
+Same as /*verilator split_var*/, see L</"LANGUAGE EXTENSIONS"> for more
+information.
+
 =back


@@ -3411,6 +3468,36 @@ behavior.  See the test_regress/t/t_dpi_display.v file for an example.
 Same as C<sformat> in configuration files, see L</"CONFIGURATION FILES">
 for more information.

+=item /*verilator split_var*/
+
+Attached to a variable or a net declaration to break the variable into
+multiple pieces typically to resolve UNOPTFLAT performance issues.
+Typically the variables to attach this to are recommeded by Verilator
+itself, see UNOPTFLAT below.
+
+For example, Verilator will internally convert a variable with the
+metacomment such as:
+
+    logic [7:0] x [0:1]  /*verilator split_var*/;
+
+To:
+
+    logic [7:0] x__BRA__0__KET__ /*verilator split_var*/;
+    logic [7:0] x__BRA__1__KET__ /*verilator split_var*/;
+
+Note that the generated packed variables retain the split_var metacomment
+because they may be split into further smaller pieces accorting to the
+access patterns.
+
+This only supports unpacked arrays, packed arrays, and packed structs of
+integer types (reg, logic, bit, byte, int...); otherwise if a split was
+requested but cannot occur a SPLITVAR warning is issued.  Splitting large
+arrays may slow donw the Verilation speed, so use this only on variables
+that require it.
+
+Same as C<split_var> in configuration files, see L</"CONFIGURATION FILES">
+for more information.
+
 =item /*verilator tag <text...>*/

 Attached after a variable or structure member to indicate opaque (to
@@ -3746,17 +3833,29 @@ $unsigned, $warning.

 Generally supported.

-=item $display, $write, $fdisplay, $fwrite, $swrite
-
-$display and friends must have a constant format string as the first
-argument (as with C's printf).  The rare usage which lists variables
-standalone without a format is not supported.
-
 =item $displayb, $displayh, $displayo, $writeb, $writeh, $writeo, etc

 The sized display functions are rarely used and so not supported.  Replace
 them with a $write with the appropriate format specifier.

+=item $dump/$dumpports and related
+
+$dumpfile or $dumpports will create a VCD or FST file (which is based on
+the --trace argument given when the model was Verilated). This will take
+effect starting at the next eval() call.  If you have multiple Verilated
+designs under the same C model, then this will dump signals only from the
+design containing the $dumpvar.
+
+$dumpvars and $dumpports module identifier is ignored; the traced instances
+will always start at the top of the design. The levels argument is also
+ignored, use tracing_on/tracing_off pragmas instead.
+
+$dumpportson/$dumpportsoff/$dumpportsall/$dumpportslimit filename argument
+is ignored, only a single trace file may be active at once.
+
+$dumpall/$dumpportsall, $dumpon/$dumpportson, $dumpoff/$dumpportsoff, and
+$dumplimit/$dumpportlimit are currently ignored.
+
 =item $finish, $stop

 The rarely used optional parameter to $finish and $stop is ignored.
@@ -3826,7 +3925,24 @@ checking across the designs, and prevents other users from compiling your
 code without knowing the magic set of disables needed to successfully
 compile your design.

-List of all warnings:
+=head2 Error and Warning Format
+
+Warnings and errors printed by Verilator always match this regular
+expression:
+
+        %(Error|Warning)(-[A-Z0-9_]+)?: ((\S+):(\d+):((\d+):)? )?.*
+
+Errors and warning start with a percent sign (historical heritage from
+Digital Equipment Corporation).  Some errors or warning have a code
+attached, with meanings described below.  Some errors also have a filename,
+line number and optional column number (starting at column 1 to match GCC).
+
+Following an the error message, Verilator will typically show the user's
+source code corresponding to the error, prefixed by the line number and a "
+| ".  Following this is typically an arrow and ~ pointing at the error on
+the source line directly above.
+
+=head2 List of all warnings

 =over 4

@@ -4374,6 +4490,29 @@ Ignoring this warning may make Verilator simulations differ from other
 simulators, if the increased precision of real affects your model or DPI
 calls.

+=item SPLITVAR
+
+Warns that a variable with a C<split_var> metacomment was not split.
+Some possible reasons for this are:
+
+* The datatype of the variable is not supported for splitting. (e.g. is a
+real).
+
+* The access pattern of the variable can not be determined
+statically. (e.g. is accessed as a memory).
+
+* The index of the array exceeds the array size.
+
+* The variable is accessed from outside using dotted reference.
+(e.g. top.instance0.variable0 = 1).
+
+* The variable is not declared in a module, but in a package or an
+interface.
+
+* The variable is a parameter, localparam, genvar, or queue.
+
+* The variable is tirstate or bidirectional. (e.g. inout or ref).
+
 =item STMTDLY

 Warns that you have a statement with a delayed time in front of it, for
@@ -4505,6 +4644,11 @@ being generated from an always statement that consumed high bits of the
 same bus processed by another series of always blocks.  The fix is the
 same; split it into two separate signals generated from each block.

+Another way to resolve this warning is to add a C<split_var> metacomment
+described above. This will cause the variable to be split internally,
+potentially resolving the conflict. If you run with --report-unoptflat
+Verilator will suggest possible candidates for C<split_var>.
+
 The UNOPTFLAT warning may also be due to clock enables, identified from the
 reported path going through a clock gating cell.  To fix these, use the
 clock_enable meta comment described above.
@@ -4771,19 +4915,20 @@ designs have topped 16GB.

 See the next question for tracing in SystemC mode.

-Add the --trace switch to Verilator, and in your top level C code, call
-Verilated::traceEverOn(true).  Then create a VerilatedVcdC object, and
-in your main loop call "trace_object->dump(time)" every time step, and
-finally call "trace_object->close()".  For an example, see below and the
-examples/make_tracing_c/sim_main.cpp file of the distribution.
+A. Add the --trace switch to Verilator, and in your top level C code, call
+Verilated::traceEverOn(true).  Then you may use $dumpfile and $dumpvars to
+enable traces, same as with any Verilog simulator. See
+C<examples/make_tracing_c>.

-You also need to compile verilated_vcd_c.cpp and add it to your link,
-preferably by adding the dependencies in $(VK_GLOBAL_OBJS) to your
-Makefile's link rule.  This is done for you if using the Verilator --exe
-flag.
-
-Note you can also call ->trace on multiple Verilated objects with the same
-trace file if you want all data to land in the same output file.
+B. Or, for finer-grained control, or C++ files with multiple Verilated
+modules you may also create the trace purely from C++.  Create a
+VerilatedVcdC object, and in your main loop call "trace_object->dump(time)"
+every time step, and finally call "trace_object->close()".  You also need
+to compile verilated_vcd_c.cpp and add it to your link, preferably by
+adding the dependencies in $(VK_GLOBAL_OBJS) to your Makefile's link rule.
+This is done for you if using the Verilator --exe flag.  Note you can also
+call ->trace on multiple Verilated objects with the same trace file if you
+want all data to land in the same output file.

    #include "verilated_vcd_c.h"
    ...
@@ -4803,11 +4948,17 @@ trace file if you want all data to land in the same output file.

 =item How do I generate waveforms (traces) in SystemC?

-Add the --trace switch to Verilator, and in your top level C sc_main code,
-include verilated_vcd_sc.h.  Then call Verilated::traceEverOn(true).  Then
-create a VerilatedVcdSc object as you would create a normal SystemC trace
-file.  For an example, see the call to VerilatedVcdSc in the
-examples/make_tracing_sc/sc_main.cpp file of the distribution, and below.
+A. Add the --trace switch to Verilator, and in your top level sc_main, call
+Verilated::traceEverOn(true).  Then you may use $dumpfile and $dumpvars to
+enable traces, same as with any Verilog simulator, see the non-SystemC
+example in C<examples/make_tracing_c>. This will trace only the module
+containing the $dumpvar.
+
+B. Or, you may create a trace purely from SystemC, which may trace all
+Verilated designs in the SystemC model. Create a VerilatedVcdSc object as
+you would create a normal SystemC trace file.  For an example, see the call
+to VerilatedVcdSc in the examples/make_tracing_sc/sc_main.cpp file of the
+distribution, and below.

 Alternatively you may use the C++ trace mechanism described in the previous
 question, however the timescale and timeprecision will not inherited from
@@ -4837,23 +4988,23 @@ trace file if you want all data to land in the same output file.

 =item How do I generate FST waveforms (traces) in C++?

-FST a format by GTKWave.
-This version provides a basic FST support.
-To dump FST format, add the --trace-fst switch to Verilator and change the include
-path in the testbench to:
+FST a format by GTKWave.  This version provides a basic FST support.  To
+dump FST format, add the --trace-fst switch to Verilator and either A. use
+$dumpfile/$dumpvars in Verilog as described in the VCD example above, or
+B. in C++ change the include described in the VCD example above:

    #include "verilated_fst_c.h"
    VerilatedFstC* tfp = new VerilatedFstC;

-Note that currently supporting both FST and VCD in a single simulation is impossible,
-but such requirement could be rare.
+Note that currently supporting both FST and VCD in a single simulation is
+impossible, but such requirement should be rare.

-=item How do I generate FST waveforms (traces) in SystemC?
+=item How do I generate FST waveforms (aka dumps or traces) in SystemC?

 The FST library from GTKWave does not currently support SystemC; use VCD
 format instead.

-=item How do I view waveforms (traces)?
+=item How do I view waveforms (aka dumps or traces)?

 Verilator makes standard VCD (Value Change Dump) and FST files.  VCD files are viewable
 with the public domain GTKWave (recommended) or Dinotrace (legacy)
@@ -5236,11 +5387,15 @@ remain anonymous.

 The latest version is available from L<https://verilator.org>.

-Copyright 2003-2020 by Wilson Snyder.  Verilator is free software; you can
+Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
 redistribute it and/or modify the Verilator internals under the terms of
 either the GNU Lesser General Public License Version 3 or the Perl Artistic
 License Version 2.0.

+All Verilog and C++/SystemC code quoted within this documentation file are
+released as Creative Commons Public Domain (CC0).  Many example files and
+test files are likewise released under CC0 into effectively the Public
+Domain as described in the files themselves.

 =head1 SEE ALSO

@@ -5248,7 +5403,7 @@ L<verilator_coverage>, L<verilator_gantt>, L<verilator_profcfunc>, L<make>,

 L<verilator --help> which is the source for this document,

-and internals.txt in the distribution.
+and docs/internals.adoc in the distribution.

 =cut

@@ -6,11 +6,6 @@
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
 #
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
 ######################################################################

 require 5.006_001;
@@ -269,10 +264,12 @@ Specifies a module search directory.

 The latest version is available from L<https://verilator.org>.

-Copyright 2003-2020 by Wilson Snyder.  Verilator is free software; you can
-redistribute it and/or modify the Verilator internals under the terms of
-either the GNU Lesser General Public License Version 3 or the Perl Artistic
-License Version 2.0.
+Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+can redistribute it and/or modify the Verilator internals 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

 =head1 AUTHORS

@@ -233,9 +233,12 @@ Do not show differences in line numbering.

 The latest version is available from L<https://verilator.org>.

-Copyright 2005-2020 by Wilson Snyder.  This package 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.
+Copyright 2005-2020 by Wilson Snyder. This program is free software; you
+can redistribute it and/or modify it under the terms of either the GNU
+Lesser General Public License Version 3 or the Perl Artistic License
+Version 2.0.
+
+SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

 =head1 AUTHORS

@@ -123,13 +123,13 @@ sub report {
    }

    my $nthreads = scalar keys %Threads;
-    $Global{cpus}{cpu_time} = {};
+    $Global{cpus} = {};
    foreach my $thread (keys %Threads) {
        # Make potentially multiple characters per column
        foreach my $start (keys %{$Threads{$thread}}) {
            my $cpu = $Threads{$thread}{$start}{cpu};
            my $elapsed = $Threads{$thread}{$start}{end} - $start;
-            $Global{cpus}{cpu_time}{$cpu} += $elapsed;
+            $Global{cpus}{$cpu}{cpu_time} += $elapsed;
        }
    }

@@ -538,9 +538,12 @@ verilator_gantt.vcd.

 The latest version is available from L<https://verilator.org>.

-Copyright 2018-2020 by Wilson Snyder.  Verilator 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.
+Copyright 2018-2020 by Wilson Snyder. This program is free software; you
+can redistribute it and/or modify it under the terms of either the GNU
+Lesser General Public License Version 3 or the Perl Artistic License
+Version 2.0.
+
+SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

 =head1 AUTHORS

@@ -1,9 +1,11 @@
 #!/usr/bin/env perl
 # DESCRIPTION: Print include statements for each ARGV
 #
-# Copyright 2003-2020 by Wilson Snyder. This package 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.
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 ######################################################################

 require 5.005;
@@ -228,9 +228,12 @@ Displays this message and program version and exits.

 The latest version is available from L<https://verilator.org>.

-Copyright 2007-2020 by Wilson Snyder.  Verilator 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.
+Copyright 2007-2020 by Wilson Snyder. This program is free software; you
+can redistribute it and/or modify it under the terms of either the GNU
+Lesser General Public License Version 3 or the Perl Artistic License
+Version 2.0.
+
+SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0

 =head1 AUTHORS

@@ -1,10 +1,11 @@
 #!/bin/bash
 # DESCRIPTION: Verilator: Build script for vcddiff
 #
-# Copyright 2019 by Todd Strader. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2019 by Todd Strader. 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
 set -e

 # NB: it would be better to add this via a PPA
@@ -1,10 +1,11 @@
 #!/bin/bash
 # DESCRIPTION: Verilator: Travis CI build script
 #
-# Copyright 2019 by Todd Strader. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2019 by Todd Strader. 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
 #
 # This script builds and caches the Verilator binaries for Travis CI
 # (and possibly other CI platforms).  The Verilator CI system uses this
@@ -1,9 +1,10 @@
 # DESCRIPTION: Dockerfile for env to build and fully test Verilator
 #
-# Copyright 2020 by Stefan Wallentowitz. 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.
+# Copyright 2020 by Stefan Wallentowitz. 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

 FROM ubuntu:18.04

@@ -1,7 +1,7 @@
-= Verilator Build Environment
+= Verilator Docker Build Environment

-This container is set up to compile and test a Verilator build based
-on the following parameters:
+This Verilator Build container is set up to compile and test a Verilator
+build. It uses the following parameters:

 * Source repository (default: https://github.com/verilator/verilator)
 * Source revision (default: master)
@@ -10,7 +10,7 @@ on the following parameters:
 The container is published as `verilator/verilator-buildenv` on
 https://hub.docker.com/repository/docker/verilator/verilator-buildenv[docker hub].

-To run the basic build of current master:
+To run the basic build using the current Verilator master:

    docker run -ti verilator/verilator-buildenv

@@ -18,7 +18,7 @@ To also run tests:

    docker run -ti verilator/verilator-buildenv test

-Change the compiler:
+To change the compiler:

    docker run -ti -e CC=gcc-4.8 -e CXX=g++-4.8 verilator/verilator-buildenv test

@@ -29,22 +29,21 @@ To run those too:
 docker run -ti -v ${PWD}:/tmp/repo -e REPO=/tmp/repo -e REV=`git rev-parse --short HEAD` -e CC=gcc-4.8 -e CXX=g++-4.8 --cap-add=SYS_PTRACE --security-opt seccomp=unconfined verilator/verilator-buildenv test
 ....

-You may want to avoid pushing your changes to a remote repository and
-instead use a local working copy. You can mount the local working copy
-path as a volume and use this as repo. Be careful, that it can only
-use committed changes, so you may want to use a work-in-progress
-commit or so. To build the current HEAD from top of a repository:
+Rather then building using a remote git repository you may prefer to use a
+working copy on the local filesystem. Mount the local working copy path as
+a volume and use that in place of git. When doing this be careful to have
+all changes committed to the local git area. To build the current HEAD from
+top of a repository:

 ....
 docker run -ti -v ${PWD}:/tmp/repo -e REPO=/tmp/repo -e REV=`git rev-parse --short HEAD` --cap-add=SYS_PTRACE --security-opt seccomp=unconfined verilator/verilator-buildenv test
 ....

-== Under the Hood
+== Rebuilding

-To rebuild the image, simply run:
+To rebuild the Verilator-buildenv docker image, run:

    docker build .

-It will build SystemC in all supported compiler variants to reduce the
-impact on testing cycles. A build script will be the entrypoint to the
-container that will perform a standard build and test procedure.
+This will also build SystemC under all supported compiler variants to
+reduce the SystemC testing time.
@@ -1,10 +1,11 @@
 #!/bin/bash -e
 # DESCRIPTION: Build SystemC in Ubuntu 18.04 with  different g++/gcc
 #
-# Copyright 2020 by Stefan Wallentowitz. 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.
+# Copyright 2020 by Stefan Wallentowitz. 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

 build_variant () {
    version=$($1 --version | grep gcc | awk '{print $4}')
@@ -1,10 +1,11 @@
 #!/bin/bash -e
 # DESCRIPTION: Build Verilator (inside container)
 #
-# Copyright 2020 by Stefan Wallentowitz. 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.
+# Copyright 2020 by Stefan Wallentowitz. 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

 : "${REPO:=https://github.com/verilator/verilator}"
 : "${REV:=master}"
@@ -1,9 +1,10 @@
 # DESCRIPTION: Dockerfile for image to run Verilator inside
 #
-# Copyright 2020 by Stefan Wallentowitz. 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.
+# Copyright 2020 by Stefan Wallentowitz. 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

 FROM ubuntu:18.04

@@ -1,49 +1,59 @@
-= Docker Container as Verilator executable
+= Verilator Executable Docker Container

-This allows you to run Verilator easily as a docker image, e.g.:
+The Verilator Executable Docker Container allows you to run Verilator
+easily as a docker image, e.g.:

    docker run -ti verilator/verilator:latest --version

-This is in particular useful to compare against older version or to
-check when an issue was introduced.
+This will install the container, run the latest Verilator and print
+Verilator's version.

-You will need to give it access to your files as a volume and fix the
-user rights:
+Containers are automatically built for all released versions, so you may
+easily compare results across versions, e.g.:
+
+    docker run -ti verilator/verilator:4.030 --version
+
+Verilator needs to read and write files on the local system.  To simplify
+this process, use the `verilator-docker` convenience script.  This script
+takes the version number, and all remaining arguments are passed through to
+Verilator. e.g.:
+
+    ./verilator-docker 4.030 --version
+
+or
+
+    ./verilator-docker 4.030 --cc test.v
+
+If you prefer not to use `verilator-docker` you must give the container
+access to your files as a volume with appropriate user rights.  For example
+to Verilate test.v:

 ....
 docker run -ti -v ${PWD}:/work --user $(id -u):$(id -g) verilator/verilator:latest --cc test.v
 ....

-The caveat is that it can only access files below the current
-directory then, a workaround is to adopt the volume and set
-`-workdir`.
+This method can only access files below the current directory. An
+alternative is setup the volume `-workdir`.

-There is a convenience script in this folder that wraps around the
-docker calls:
-
-    $ verilator-docker 3.922 --version
-    Verilator 3.922 2018-03-17 rev UNKNOWN_REV
-
-Finally, you can also work in the container by setting the entrypoint
+You can also work in the container by setting the entrypoint
 (don't forget to mount a volume if you want your work persistent):

    docker run -ti --entrypoint /bin/bash verilator/verilator:latest

-The other files in this folder all for building the containers and to
-store in them. You could use it to build Verilator at a specific
+You can also use the container to build Verilator at a specific
 commit:

    docker build --build-arg SOURCE_COMMIT=<commit> .

 == Internals

-The Dockerfile is pretty straight-forward, it builds Verilator and
-removes the tree after that to reduce the image size. It sets a
-wrapper script (`verilator-wrap.sh`) as entrypoint. This script calls
-Verilator but also copies the verilated runtime files to the `obj_dir`
-or the `-Mdir` respectively. This allows the user to build the C++
-output with the matching runtime files. The wrapper patches the
-generated Makefile accordingly.
+The Dockerfile builds Verilator and removes the tree when completed to
+reduce the image size. The entrypoint is set as a wrapper script
+(`verilator-wrap.sh`).  That script 1. calls Verilator, and 2. copies the
+Verilated runtime files to the `obj_dir` or the `-Mdir` respectively. This
+allows the user to have the files to they may later build the C++ output
+with the matching runtime files. The wrapper also patches the Verilated
+Makefile accordingly.

 There is also a hook defined that is run by docker hub via automated
 builds.
@@ -1,9 +1,10 @@
 #!/bin/bash
 # DESCRIPTION: Docker hub hook to pass SOURCE_COMMIT
 #
-# Copyright 2020 by Stefan Wallentowitz. 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.FROM ubuntu:18.04
+# Copyright 2020 by Stefan Wallentowitz. 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

 docker build --build-arg SOURCE_COMMIT=${SOURCE_COMMIT} -f $DOCKERFILE_PATH -t $IMAGE_NAME .
@@ -1,10 +1,11 @@
 #!/bin/bash
 # DESCRIPTION: Docker hub hook to tag the latest release (stable)
 #
-# Copyright 2020 by Stefan Wallentowitz. 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.FROM ubuntu:18.04
+# Copyright 2020 by Stefan Wallentowitz. 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

 if [ "$SOURCE_BRANCH"="stable" ]; then
    docker tag $IMAGE_NAME $DOCKER_REPO:latest
@@ -1,10 +1,11 @@
 #!/bin/bash
 # DESCRIPTION: Wrap a verilator call to run a docker container
 #
-# Copyright 2020 by Stefan Wallentowitz. 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.
+# Copyright 2020 by Stefan Wallentowitz. 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

 docker pull verilator/verilator:$1 >/dev/null
 docker run -ti -v ${PWD}:/work --user $(id -u):$(id -g) verilator/verilator:$1 "${@:2}"
@@ -1,13 +1,18 @@
-#!/bin/bash -e
+#!/bin/bash
 # DESCRIPTION: Wrap a Verilator call and copy vlt includes
 #              (inside docker container)
 #
-# Copyright 2020 by Stefan Wallentowitz. 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.
+# Copyright 2020 by Stefan Wallentowitz. 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

 perl /usr/local/bin/verilator "$@"
+status=$?
+if [ $status -ne 0 ]; then
+    exit $status
+fi

 # Check if user set an obj_dir
 obj_dir=$(echo " $@" | grep -oP '\s--Mdir\s*\K\S+')
@@ -1,10 +1,12 @@
 #!/bin/bash
 # DESCRIPTION: Verilator: Travis CI test script
 #
-# Copyright 2019 by Todd Strader. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2019 by Todd Strader. 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
+
 set -e

 export DRIVER_FLAGS='-j 0 --quiet --rerun'
@@ -19,6 +21,12 @@ case $1 in
    vltmt)
        make -C test_regress SCENARIOS=--vltmt
        ;;
+    vltmt0)
+        make -C test_regress SCENARIOS=--vltmt DRIVER_HASHSET=--hashset=0/2
+        ;;
+    vltmt1)
+        make -C test_regress SCENARIOS=--vltmt DRIVER_HASHSET=--hashset=1/2
+        ;;
    *)
    echo "Usage: test.sh (dist|vlt|vltmt)"
    exit -1
@@ -1,12 +1,13 @@
 # DESCRIPTION: Process this file with autoconf to produce a configure script.
 #
-# Copyright 2003-2020 by Wilson Snyder. Verilator is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU Lesser
+# Copyright 2003-2020 by Wilson Snyder. Verilator 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

 #AC_INIT([Verilator],[#.### YYYY-MM-DD])
 #AC_INIT([Verilator],[#.### devel])
-AC_INIT([Verilator],[4.028 2020-02-06],
+AC_INIT([Verilator],[4.032 2020-04-04],
        [https://verilator.org],
        [verilator],[https://verilator.org])
 # When releasing, also update header of Changes file
@@ -301,7 +302,6 @@ AC_SUBST(CFG_CXXFLAGS_WEXTRA)
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_SRC,-Qunused-arguments)
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_SRC,-faligned-new)
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_SRC,-Wno-unused-parameter)
-_MY_CXX_CHECK_OPT(CFG_CXXFLAGS_SRC,-Wno-undefined-bool-conversion)
 _MY_CXX_CHECK_OPT(CFG_CXXFLAGS_SRC,-Wno-shadow)
 AC_SUBST(CFG_CXXFLAGS_SRC)

@@ -369,8 +369,13 @@ AC_SUBST(CFG_LDFLAGS_SRC)
 # The pthread library is required by tcmalloc, so add it if it exists. If it
 # does not, the tcmalloc check below will fail anyway, and linking against
 # pthreads is harmless otherwise.
+CFG_LIBS="$LIBS $CFG_LIBS"
 _MY_LDLIBS_CHECK_OPT(CFG_LIBS, -lpthread)

+# Check libraries for MingW
+_MY_LDLIBS_CHECK_OPT(CFG_LIBS, -lbcrypt)
+_MY_LDLIBS_CHECK_OPT(CFG_LIBS, -lpsapi)
+
 # Check if tcmalloc is available based on --enable-tcmalloc
 _MY_LDLIBS_CHECK_IFELSE(
  $LTCMALLOC,
@@ -50,13 +50,13 @@ contributions flow more efficiently.
   link:CONTRIBUTORS[docs/CONTRIBUTORS] and you are agreeing all future
   contributions are also certified.

-** We occasionally accept contributions where people do not want their
-   name published. Please email us; you must still certify your
-   contribution using email.
+** We occasionally accept contributions where people do not want their name
+   published. Please email us; you must still privately certify your
+   contribution.

-* Your test contributions are generally considered released into the public
-  domain, unless you request otherwise or put a GNU/Artistic license on
-  your test file.
+* Your test contributions are generally considered released into the
+  Creative Commons Public Domain (CC0), unless you request otherwise or put
+  a GNU/Artistic license on your file.

 * Most important is we get your patch. If you'd like to clean up
  indentation and related issues ahead of our feedback, that is
@@ -8,6 +8,7 @@ all.
 Ahmed El-Mahmoudy
 Alex Chadwick
 Chris Randall
+David Stanford
 Driss Hafdi
 Eric Rippey
 Garrett Smith
@@ -23,6 +24,8 @@ Kevin Kiningham
 Kuba Ober
 Lukasz Dalek
 Maarten De Braekeleer
+Maciej Sobkowski
+Marco Widmer
 Matthew Ballance
 Mike Popoloski
 Patrick Stewart
@@ -30,9 +33,11 @@ Peter Monsson
 Philipp Wagner
 Pieter Kapsenberg
 Richard Myers
+Sean Cross
 Sebastien Van Cauwenberghe
 Stefan Wallentowitz
 Tobias Rosenkranz
+Tobias Wölfel
 Todd Strader
 Wilson Snyder
 Yutetsu TAKATSUKASA
@@ -7,15 +7,11 @@
 #
 #*****************************************************************************
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
-#
-# Verilator is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 #****************************************************************************/
 #
@@ -4,6 +4,7 @@
 // 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

 * Language support:
 ** Fix ordering of each bit separately in a signal (mips)
@@ -22,17 +23,10 @@
 ** Assertions
 ** Tristate support

-* Configure/Make/Install
-** Distribute with flex/bison already expanded?
-   Flex library not needed.  Probably too difficult to be worth it.
-
 * Testing:
-** Capture all inputs into global "rerun it" file
 ** Code to make wrapper that sets signals, so can do comparison checks
 ** New random program generator
 ** Better graph viewer with search and zoom
-** Port and test against opencores.org code
-** // verilator debug in code so can see only tree affecting those nodes

 * Usability:
 ** Detect and pre-remove most UNOPTFLATs
@@ -0,0 +1,159 @@
+clang-format is used to standardize the indentation of the internal C++
+code.
+
+For the most part clang-format changes provide good consistency, the two
+main exceptions being the indentation of preprocessor directives, and
+tables of statements.
+
+Reformatting is generally performed only before other large changes are to
+be made to a file.  The following files are not yet clang-format clean:
+
+clang-format -i include/verilated.h
+clang-format -i include/verilated_dpi.h
+clang-format -i include/verilated_fst_c.h
+clang-format -i include/verilated_heavy.h
+clang-format -i include/verilated_imp.h
+clang-format -i include/verilated_save.h
+clang-format -i include/verilated_sym_props.h
+clang-format -i include/verilated_unordered_set_map.h
+clang-format -i include/verilated_vcd_c.h
+clang-format -i include/verilatedos.h
+
+clang-format -i include/verilated.cpp
+clang-format -i include/verilated_cov.cpp
+clang-format -i include/verilated_dpi.cpp
+clang-format -i include/verilated_fst_c.cpp
+clang-format -i include/verilated_save.cpp
+clang-format -i include/verilated_threads.cpp
+clang-format -i include/verilated_vcd_c.cpp
+clang-format -i include/verilated_vpi.cpp
+
+clang-format -i src/V3Ast.h
+clang-format -i src/V3AstNodes.h
+clang-format -i src/V3EmitCBase.h
+clang-format -i src/V3Error.h
+clang-format -i src/V3File.h
+clang-format -i src/V3FileLine.h
+clang-format -i src/V3Global.h
+clang-format -i src/V3Graph.h
+clang-format -i src/V3GraphDfa.h
+clang-format -i src/V3GraphStream.h
+clang-format -i src/V3Hashed.h
+clang-format -i src/V3LanguageWords.h
+clang-format -i src/V3LinkDot.h
+clang-format -i src/V3List.h
+clang-format -i src/V3Number.h
+clang-format -i src/V3Options.h
+clang-format -i src/V3OrderGraph.h
+clang-format -i src/V3Os.h
+clang-format -i src/V3ParseImp.h
+clang-format -i src/V3ParseSym.h
+clang-format -i src/V3Partition.h
+clang-format -i src/V3PartitionGraph.h
+clang-format -i src/V3PreLex.h
+clang-format -i src/V3PreProc.h
+clang-format -i src/V3Scoreboard.h
+clang-format -i src/V3SenTree.h
+clang-format -i src/V3Simulate.h
+clang-format -i src/V3Stats.h
+clang-format -i src/V3String.h
+clang-format -i src/V3SymTable.h
+clang-format -i src/V3TSP.h
+clang-format -i src/V3Task.h
+clang-format -i src/V3WidthCommit.h
+
+clang-format -i src/V3Active.cpp
+clang-format -i src/V3ActiveTop.cpp
+clang-format -i src/V3Assert.cpp
+clang-format -i src/V3AssertPre.cpp
+clang-format -i src/V3Ast.cpp
+clang-format -i src/V3AstNodes.cpp
+clang-format -i src/V3Begin.cpp
+clang-format -i src/V3Branch.cpp
+clang-format -i src/V3Broken.cpp
+clang-format -i src/V3CCtors.cpp
+clang-format -i src/V3Case.cpp
+clang-format -i src/V3Cast.cpp
+clang-format -i src/V3Cdc.cpp
+clang-format -i src/V3Changed.cpp
+clang-format -i src/V3Clean.cpp
+clang-format -i src/V3Clock.cpp
+clang-format -i src/V3Combine.cpp
+clang-format -i src/V3Const.cpp
+clang-format -i src/V3Coverage.cpp
+clang-format -i src/V3CoverageJoin.cpp
+clang-format -i src/V3Dead.cpp
+clang-format -i src/V3Delayed.cpp
+clang-format -i src/V3Depth.cpp
+clang-format -i src/V3DepthBlock.cpp
+clang-format -i src/V3EmitC.cpp
+clang-format -i src/V3EmitCInlines.cpp
+clang-format -i src/V3EmitCMake.cpp
+clang-format -i src/V3EmitCSyms.cpp
+clang-format -i src/V3EmitMk.cpp
+clang-format -i src/V3EmitV.cpp
+clang-format -i src/V3EmitXml.cpp
+clang-format -i src/V3Error.cpp
+clang-format -i src/V3Expand.cpp
+clang-format -i src/V3File.cpp
+clang-format -i src/V3FileLine.cpp
+clang-format -i src/V3Gate.cpp
+clang-format -i src/V3GenClk.cpp
+clang-format -i src/V3Graph.cpp
+clang-format -i src/V3GraphAcyc.cpp
+clang-format -i src/V3GraphAlg.cpp
+clang-format -i src/V3GraphDfa.cpp
+clang-format -i src/V3GraphPathChecker.cpp
+clang-format -i src/V3GraphTest.cpp
+clang-format -i src/V3Hashed.cpp
+clang-format -i src/V3Inline.cpp
+clang-format -i src/V3Inst.cpp
+clang-format -i src/V3InstrCount.cpp
+clang-format -i src/V3Life.cpp
+clang-format -i src/V3LifePost.cpp
+clang-format -i src/V3LinkCells.cpp
+clang-format -i src/V3LinkDot.cpp
+clang-format -i src/V3LinkJump.cpp
+clang-format -i src/V3LinkLValue.cpp
+clang-format -i src/V3LinkLevel.cpp
+clang-format -i src/V3LinkParse.cpp
+clang-format -i src/V3LinkResolve.cpp
+clang-format -i src/V3Localize.cpp
+clang-format -i src/V3Name.cpp
+clang-format -i src/V3Number.cpp
+clang-format -i src/V3Number_test.cpp
+clang-format -i src/V3Options.cpp
+clang-format -i src/V3Order.cpp
+clang-format -i src/V3Os.cpp
+clang-format -i src/V3Param.cpp
+clang-format -i src/V3ParseGrammar.cpp
+clang-format -i src/V3ParseImp.cpp
+clang-format -i src/V3ParseLex.cpp
+clang-format -i src/V3Partition.cpp
+clang-format -i src/V3PreProc.cpp
+clang-format -i src/V3PreShell.cpp
+clang-format -i src/V3Premit.cpp
+clang-format -i src/V3ProtectLib.cpp
+clang-format -i src/V3Reloop.cpp
+clang-format -i src/V3Scope.cpp
+clang-format -i src/V3Scoreboard.cpp
+clang-format -i src/V3Slice.cpp
+clang-format -i src/V3Split.cpp
+clang-format -i src/V3SplitAs.cpp
+clang-format -i src/V3SplitVar.cpp
+clang-format -i src/V3Stats.cpp
+clang-format -i src/V3StatsReport.cpp
+clang-format -i src/V3String.cpp
+clang-format -i src/V3Subst.cpp
+clang-format -i src/V3TSP.cpp
+clang-format -i src/V3Table.cpp
+clang-format -i src/V3Task.cpp
+clang-format -i src/V3Trace.cpp
+clang-format -i src/V3TraceDecl.cpp
+clang-format -i src/V3Tristate.cpp
+clang-format -i src/V3Undriven.cpp
+clang-format -i src/V3Unknown.cpp
+clang-format -i src/V3Unroll.cpp
+clang-format -i src/V3Width.cpp
+clang-format -i src/V3WidthSel.cpp
+clang-format -i src/Verilator.cpp
@@ -98,9 +98,11 @@ Additionally, to build or run Verilator you need these standard packages:

 Those developing Verilator may also want these (see internals.adoc):

-   sudo apt-get install gdb asciidoctor graphviz
+   sudo apt-get install gdb asciidoctor graphviz cmake
   cpan install Pod::Perldoc
   cpan install Unix::Processors
+   cpan install Parallel::Forker
+   cpan install Bit::Vector

 ==== Install SystemC

@@ -301,3 +303,4 @@ or https://verilator.org/verilator_doc.pdf[Verilator manual (PDF)].
 Copyright 2008-2020 by Wilson Snyder.  Verilator 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
@@ -625,13 +625,17 @@ with e.g. "sudo cpan install Parallel::Forker".
 * vcddiff to find differences in VCD outputs. See the readme at
 https://github.com/veripool/vcddiff

+* Cmake for build paths that use it.
+
+* Bit::Vector to test vgen.pl
+
 === Controlling the Test Driver

 Test drivers are written in PERL. All invoke the main test driver script,
 which can provide detailed help on all the features available when writing
 a test driver.

-   test_regress/t/driver.pl --help
+   test_regress/driver.pl --help

 For convenience, a summary of the most commonly used features is provided
 here. All drivers require a call to `compile` subroutine to compile the
@@ -716,6 +720,13 @@ respectively 16,384 and 4,096. The method of doing this is system
 dependent, but on Fedora Linux it would require editing the
 `/etc/security/limits.conf` file as root.

+=== Manual Test Execution
+
+A specific regression test can be executed manually. To start the "EXAMPLE"
+test, run the following command.
+
+   test_regress/t/t_EXAMPLE.pl
+
 === Continuous Integration

 Verilator has a https://travis-ci.com/verilator/verilator[Travis CI environment]
@@ -987,3 +998,4 @@ list in `src/Makefile_obj.in` and reconfigure.
 Copyright 2008-2020 by Wilson Snyder.  Verilator 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
@@ -63,3 +63,10 @@ each describing the contents of that module, and a single `<typetable>`...
 `</typetable>` element which lists all used types used within the
 modules. Each type has a numeric `id` attribute that is referred to by
 elements in the `<module>` elements using the `dtype_id` attribute.
+
+== Distribution
+
+Copyright 2020-2020 by Wilson Snyder.  Verilator 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
@@ -5,10 +5,11 @@
 # This is an example cmake script to build a verilog to systemc project
 # using cmake and verilator.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -6,10 +6,11 @@
 # This makefile is here for testing the examples and should
 # generally not be added to a CMake project.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -5,10 +5,11 @@
 # This is an example cmake script to build a verilog to SystemC project
 # using CMake and Verilator.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -6,10 +6,11 @@
 # This makefile is here for testing the examples and should
 # generally not be added to a CMake project.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -5,10 +5,11 @@
 # This is an example cmake script to build a verilog to systemc project
 # using cmake and verilator.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -6,10 +6,11 @@
 # This makefile is here for testing the examples and should
 # generally not be added to a CMake project.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -5,10 +5,11 @@
 # This is an example cmake script to build a verilog to systemc project
 # using cmake and verilator.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -34,5 +35,5 @@ add_executable(example ../make_tracing_c/sim_main.cpp)
 # Add the Verilated circuit to the target
 verilate(example COVERAGE TRACE
  INCLUDE_DIRS "../make_tracing_c"
-  VERILATOR_ARGS -f ../make_tracing_c/input.vc -O2 -x-assign 0
+  VERILATOR_ARGS -f ../make_tracing_c/input.vc -Os -x-assign 0
  SOURCES ../make_tracing_c/top.v)
@@ -6,10 +6,11 @@
 # This makefile is here for testing the examples and should
 # generally not be added to a CMake project.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -5,10 +5,11 @@
 # This is an example cmake script to build a verilog to SystemC project
 # using CMake and Verilator.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -41,7 +42,7 @@ add_executable(example ../make_tracing_sc/sc_main.cpp)
 # Add the Verilated circuit to the target
 verilate(example SYSTEMC COVERAGE TRACE
  INCLUDE_DIRS "../make_tracing_sc"
-  VERILATOR_ARGS -f ../make_tracing_sc/input.vc -O2 -x-assign 0
+  VERILATOR_ARGS -f ../make_tracing_sc/input.vc -Os -x-assign 0
  SOURCES ../make_tracing_sc/top.v)

 verilator_link_systemc(example)
@@ -6,10 +6,11 @@
 # This makefile is here for testing the examples and should
 # generally not be added to a CMake project.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -5,10 +5,11 @@
 # This calls the object directory makefile.  That allows the objects to
 # be placed in the "current directory" which simplifies the Makefile.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################
 # Check for sanity to avoid later confusion
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2017 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2017 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 //======================================================================

 // Include common routines
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2017 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2017 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0

 // See also the EXAMPLE section in the verilator manpage/document.
 module top;
@@ -5,10 +5,11 @@
 # This calls the object directory makefile.  That allows the objects to
 # be placed in the "current directory" which simplifies the Makefile.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################
 # Check for sanity to avoid later confusion
@@ -1,8 +1,9 @@
 // -*- SystemC -*-
 // DESCRIPTION: Verilator Example: Top level main for invoking SystemC model
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2017 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2017 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 //======================================================================

 // SystemC global header
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2017 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2017 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0

 // See also the EXAMPLE section in the verilator manpage/document.
 module top;
@@ -5,10 +5,11 @@
 # This calls the object directory makefiles.  That allows the objects to
 # be placed in the "current directory" which simplifies the Makefile.
 #
-# Copyright 2019 by Todd Strader. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2019 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
 #
 ######################################################################
 # Check for sanity to avoid later confusion
@@ -34,7 +35,7 @@ VERILATOR_FLAGS =
 # Generate C++
 VERILATOR_FLAGS += -cc
 # Optimize
-VERILATOR_FLAGS += -O2 -x-assign 0
+VERILATOR_FLAGS += -Os -x-assign 0
 # Warn abount lint issues; may not want this on less solid designs
 VERILATOR_FLAGS += -Wall
 # Make waveforms
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: --protect-lib example secret module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2019 by Todd Strader.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2019 by Todd Strader.
+// SPDX-License-Identifier: CC0-1.0

 // This module will be used as libsecret.a or libsecret.so without
 // exposing the source.
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: --protect-lib example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2019 by Todd Strader.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2019 by Todd Strader.
+// SPDX-License-Identifier: CC0-1.0
 //======================================================================

 // See examples/tracing_c for notes on tracing
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: --protect-lib example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2019 by Todd Strader.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2019 by Todd Strader.
+// SPDX-License-Identifier: CC0-1.0

 // See also the EXAMPLE section in the verilator manpage/document.
 module top (input clk);
@@ -5,10 +5,11 @@
 # This calls the object directory makefile.  That allows the objects to
 # be placed in the "current directory" which simplifies the Makefile.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################
 # Check for sanity to avoid later confusion
@@ -38,7 +39,7 @@ VERILATOR_FLAGS += -cc --exe
 # Generate makefile dependencies (not shown as complicates the Makefile)
 #VERILATOR_FLAGS += -MMD
 # Optimize
-VERILATOR_FLAGS += -O2 -x-assign 0
+VERILATOR_FLAGS += -Os -x-assign 0
 # Warn abount lint issues; may not want this on less solid designs
 VERILATOR_FLAGS += -Wall
 # Make waveforms
@@ -5,10 +5,11 @@
 #
 # This is executed in the object directory, and called by ../Makefile
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 #######################################################################

@@ -38,7 +39,7 @@ endif
 # SystemC takes minutes to optimize, thus it is off by default.
 OPT_SLOW =
 # Fast path optimizations.  Most time is spent in these classes.
-OPT_FAST = -O2 -fstrict-aliasing
+OPT_FAST = -Os -fstrict-aliasing
 #OPT_FAST = -O
 #OPT_FAST =

@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2017 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2017 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 //======================================================================

 // Include common routines
@@ -10,11 +11,6 @@
 // Include model header, generated from Verilating "top.v"
 #include "Vtop.h"

-// If "verilator --trace" is used, include the tracing class
-#if VM_TRACE
-# include <verilated_vcd_c.h>
-#endif
-
 // Current simulation time (64-bit unsigned)
 vluint64_t main_time = 0;
 // Called by $time in Verilog
@@ -36,31 +32,21 @@ int main(int argc, char** argv, char** env) {
    // May be overridden by commandArgs
    Verilated::randReset(2);

+    // Verilator must compute traced signals
+    Verilated::traceEverOn(true);
+
    // Pass arguments so Verilated code can see them, e.g. $value$plusargs
    // This needs to be called before you create any model
    Verilated::commandArgs(argc, argv);

+    // Create logs/ directory in case we have traces to put under it
+    Verilated::mkdir("logs");
+
    // Construct the Verilated model, from Vtop.h generated from Verilating "top.v"
    Vtop* top = new Vtop;  // Or use a const unique_ptr, or the VL_UNIQUE_PTR wrapper

-#if VM_TRACE
-    // If verilator was invoked with --trace argument,
-    // and if at run time passed the +trace argument, turn on tracing
-    VerilatedVcdC* tfp = NULL;
-    const char* flag = Verilated::commandArgsPlusMatch("trace");
-    if (flag && 0==strcmp(flag, "+trace")) {
-        Verilated::traceEverOn(true);  // Verilator must compute traced signals
-        VL_PRINTF("Enabling waves into logs/vlt_dump.vcd...\n");
-        tfp = new VerilatedVcdC;
-        top->trace(tfp, 99);  // Trace 99 levels of hierarchy
-        Verilated::mkdir("logs");
-        tfp->open("logs/vlt_dump.vcd");  // Open the dump file
-    }
-#endif
-
    // Set some inputs
    top->reset_l = !0;
-    top->fastclk = 0;
    top->clk = 0;
    top->in_small = 1;
    top->in_quad = 0x1234;
@@ -72,31 +58,29 @@ int main(int argc, char** argv, char** env) {
    while (!Verilated::gotFinish()) {
        main_time++;  // Time passes...

-        // Toggle clocks and such
-        top->fastclk = !top->fastclk;
-        if ((main_time % 10) == 3) {
-            top->clk = 1;
-        }
-        if ((main_time % 10) == 8) {
-            top->clk = 0;
-        }
-        if (main_time > 1 && main_time < 10) {
-            top->reset_l = !1;  // Assert reset
-        } else {
-            top->reset_l = !0;  // Deassert reset
-        }
+        // Toggle a fast (time/2 period) clock
+        top->clk = !top->clk;

-        // Assign some other inputs
-        top->in_quad += 0x12;
+        // Toggle control signals on an edge that doesn't correspond
+        // to where the controls are sampled; in this example we do
+        // this only on a negedge of clk, because we know
+        // reset is not sampled there.
+        if (!top->clk) {
+            if (main_time > 1 && main_time < 10) {
+                top->reset_l = !1;  // Assert reset
+            } else {
+                top->reset_l = !0;  // Deassert reset
+            }
+            // Assign some other inputs
+            top->in_quad += 0x12;
+        }

        // Evaluate model
+        // (If you have multiple models being simulated in the same
+        // timestep then instead of eval(), call eval_step() on each, then
+        // eval_end_step() on each.)
        top->eval();

-#if VM_TRACE
-        // Dump trace data for this cycle
-        if (tfp) tfp->dump(main_time);
-#endif
-
        // Read outputs
        VL_PRINTF("[%" VL_PRI64 "d] clk=%x rstl=%x iquad=%" VL_PRI64 "x"
                  " -> oquad=%" VL_PRI64"x owide=%x_%08x_%08x\n",
@@ -107,11 +91,6 @@ int main(int argc, char** argv, char** env) {
    // Final model cleanup
    top->final();

-    // Close trace if opened
-#if VM_TRACE
-    if (tfp) { tfp->close(); tfp = NULL; }
-#endif
-
    //  Coverage analysis (since test passed)
 #if VM_COVERAGE
    Verilated::mkdir("logs");
@@ -1,31 +1,17 @@
 // DESCRIPTION: Verilator: Verilog Test module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2003 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2003 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 // ======================================================================

 module sub
  (
   input clk,
-   input fastclk,
   input reset_l
   );

   // Example counter/flop
-   reg [31:0] count_f;
-   always_ff @ (posedge fastclk) begin
-      if (!reset_l) begin
-         /*AUTORESET*/
-         // Beginning of autoreset for uninitialized flops
-         count_f <= 32'h0;
-         // End of automatics
-      end
-      else begin
-         count_f <= count_f + 1;
-      end
-   end
-
-   // Another example flop
   reg [31:0] count_c;
   always_ff @ (posedge clk) begin
      if (!reset_l) begin
@@ -37,8 +23,6 @@ module sub
      else begin
         count_c <= count_c + 1;
         if (count_c >= 3) begin
-            $display("[%0t] fastclk is %0d times faster than clk\n",
-                     $time, count_f/count_c);
            // This write is a magic value the Makefile uses to make sure the
            // test completes successfully.
            $write("*-* All Finished *-*\n");
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2003 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2003 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 // ======================================================================

 // This is intended to be a complex example of several features, please also
@@ -11,7 +12,6 @@ module top
  (
   // Declare some signals so we can see how I/O works
   input         clk,
-   input         fastclk,
   input         reset_l,

   output wire [1:0]  out_small,
@@ -31,11 +31,15 @@ module top
   sub sub (/*AUTOINST*/
            // Inputs
            .clk                        (clk),
-            .fastclk                    (fastclk),
            .reset_l                    (reset_l));

   // Print some stuff as an example
   initial begin
+      if ($test$plusargs("trace") != 0) begin
+         $display("[%0t] Tracing to logs/vlt_dump.vcd...\n", $time);
+         $dumpfile("logs/vlt_dump.vcd");
+         $dumpvars();
+      end
      $display("[%0t] Model running...\n", $time);
   end

@@ -5,10 +5,11 @@
 # This calls the object directory makefile.  That allows the objects to
 # be placed in the "current directory" which simplifies the Makefile.
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################
 # Check for sanity to avoid later confusion
@@ -38,7 +39,7 @@ VERILATOR_FLAGS += -sc --exe
 # Generate makefile dependencies (not shown as complicates the Makefile)
 #VERILATOR_FLAGS += -MMD
 # Optimize
-VERILATOR_FLAGS += -O2 -x-assign 0
+VERILATOR_FLAGS += -Os -x-assign 0
 # Warn abount lint issues; may not want this on less solid designs
 VERILATOR_FLAGS += -Wall
 # Make waveforms
@@ -5,10 +5,11 @@
 #
 # This is executed in the object directory, and called by ../Makefile
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 #######################################################################

@@ -46,7 +47,7 @@ endif
 # SystemC takes minutes to optimize, thus it is off by default.
 OPT_SLOW =
 # Fast path optimizations.  Most time is spent in these classes.
-OPT_FAST = -O2 -fstrict-aliasing
+OPT_FAST = -Os -fstrict-aliasing
 #OPT_FAST = -O
 #OPT_FAST =

@@ -1,8 +1,9 @@
 // -*- SystemC -*-
 // DESCRIPTION: Verilator Example: Top level main for invoking SystemC model
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2017 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2017 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 //======================================================================

 // SystemC global header
@@ -37,6 +38,9 @@ int sc_main(int argc, char* argv[]) {
    // This needs to be called before you create any model
    Verilated::commandArgs(argc, argv);

+    // Create logs/ directory in case we have traces to put under it
+    Verilated::mkdir("logs");
+
    // General logfile
    ios::sync_with_stdio();

@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog Test module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2003 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2003 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 // ======================================================================

 module sub
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2003 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2003 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 // ======================================================================

 // This is intended to be a complex example of several features, please also
@@ -2,10 +2,11 @@
 #
 # DESCRIPTION: Verilator Example: XML tests
 #
-# Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
-# redistribute it and/or modify it under the terms of either the GNU
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
 # Lesser General Public License Version 3 or the Perl Artistic License
 # Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 #
 ######################################################################

@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog Test module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2019 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2019 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 // ======================================================================

 module sub
@@ -1,7 +1,8 @@
 // DESCRIPTION: Verilator: Verilog example module
 //
-// This file ONLY is placed into the Public Domain, for any use,
-// without warranty, 2019 by Wilson Snyder.
+// This file ONLY is placed under the Creative Commons Public Domain, for
+// any use, without warranty, 2019 by Wilson Snyder.
+// SPDX-License-Identifier: CC0-1.0
 // ======================================================================

 module top
@@ -84,8 +84,10 @@ Example usage:
  -v <filename>              Verilog library
  -y <dir>                   Directory to search for modules

-This file ONLY is placed into the Public Domain, for any use, without
-warranty, 2019 by Wilson Snyder."""
+This file ONLY is placed under the Creative Commons Public Domain, for
+any use, without warranty, 2019 by Wilson Snyder.
+SPDX-License-Identifier: CC0-1.0
+"""
    )
    parser.add_argument('-debug', '--debug',
                        action='store_const', const=9,
@@ -108,8 +108,10 @@ Example usage:
  -v <filename>              Verilog library
  -y <dir>                   Directory to search for modules

-This file ONLY is placed into the Public Domain, for any use, without
-warranty, 2019 by Wilson Snyder."""
+This file ONLY is placed under the Creative Commons Public Domain, for
+any use, without warranty, 2019 by Wilson Snyder.
+SPDX-License-Identifier: CC0-1.0
+"""
    )
    parser.add_argument('-debug', '--debug',
                        action='store_const', const=9,
@@ -22,6 +22,8 @@
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
+
+  SPDX-License-Identifier: MIT
 */

 #include "fastlz.h"
@@ -22,6 +22,8 @@
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
+
+  SPDX-License-Identifier: MIT
 */

 #ifndef FASTLZ_H
@@ -18,6 +18,8 @@
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
 */

 /*
@@ -1024,7 +1026,9 @@ if(!xc->curval_mem)

 static void fstDestroyMmaps(struct fstWriterContext *xc, int is_closing)
 {
+#if !defined __CYGWIN__ && !defined __MINGW32__
 (void)is_closing;
+#endif

 fstMunmap(xc->valpos_mem, xc->maxhandle * 4 * sizeof(uint32_t));
 xc->valpos_mem = NULL;
@@ -18,6 +18,8 @@
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
 */

 #ifndef FST_API_H
@@ -27,6 +27,8 @@
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+   SPDX-License-Identifier: BSD-2-Clause
+
   You can contact the author at :
   - LZ4 source repository : https://github.com/Cyan4973/lz4
   - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
@@ -28,6 +28,8 @@
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

+   SPDX-License-Identifier: BSD-2-Clause
+
   You can contact the author at :
   - LZ4 source repository : https://github.com/Cyan4973/lz4
   - LZ4 public forum : https://groups.google.com/forum/#!forum/lz4c
@@ -18,6 +18,8 @@
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
+ *
+ * SPDX-License-Identifier: MIT
 */

 #ifndef WAVE_ALLOCA_H
@@ -3,13 +3,9 @@
 //
 // Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=========================================================================
 ///
@@ -888,7 +884,7 @@ static inline int  _vl_vsss_peek(FILE* fp, int& floc, WDataInP fromp,
 }
 static inline void _vl_vsss_skipspace(FILE* fp, int& floc,
                                      WDataInP fromp, const std::string& fstr) VL_MT_SAFE {
-    while (1) {
+    while (true) {
        int c = _vl_vsss_peek(fp, floc, fromp, fstr);
        if (c==EOF || !isspace(c)) return;
        _vl_vsss_advance(fp, floc);
@@ -898,7 +894,7 @@ static inline void _vl_vsss_read(FILE* fp, int& floc, WDataInP fromp, const std:
                                 char* tmpp, const char* acceptp) VL_MT_SAFE {
    // Read into tmp, consisting of characters from acceptp list
    char* cp = tmpp;
-    while (1) {
+    while (true) {
        int c = _vl_vsss_peek(fp, floc, fromp, fstr);
        if (c==EOF || isspace(c)) break;
        if (acceptp  // String - allow anything
@@ -1344,7 +1340,7 @@ IData VL_FREAD_I(int width, int array_lsb, int array_size,
    // Read the data
    // We process a character at a time, as then we don't need to deal
    // with changing buffer sizes dynamically, etc.
-    while (1) {
+    while (true) {
        int c = fgetc(fp);
        if (VL_UNLIKELY(c == EOF)) break;
        // Shift value in
@@ -1602,6 +1598,25 @@ IData VL_ATOI_N(const std::string& str, int base) VL_PURE {
    return static_cast<IData>(v);
 }

+//===========================================================================
+// Dumping
+
+const char* vl_dumpctl_filenamep(bool setit, const std::string& filename) VL_MT_SAFE {
+    // This function performs both accessing and setting so it's easy to make an in-function static
+    static VL_THREAD_LOCAL std::string t_filename;
+    if (setit) {
+        t_filename = filename;
+    } else {
+        static VL_THREAD_LOCAL bool t_warned = false;
+        if (VL_UNLIKELY(t_filename.empty() && !t_warned)) {
+            t_warned = true;
+            VL_PRINTF_MT("%%Warning: $dumpvar ignored as not proceeded by $dumpfile\n");
+            return "";
+        }
+    }
+    return t_filename.c_str();
+}
+
 //===========================================================================
 // Readmem/writemem

@@ -1653,7 +1668,7 @@ bool VlReadMem::get(QData& addrr, std::string& valuer) {
    // Read the data
    // We process a character at a time, as then we don't need to deal
    // with changing buffer sizes dynamically, etc.
-    while (1) {
+    while (true) {
        int c = fgetc(m_fp);
        if (VL_UNLIKELY(c == EOF)) break;
        // printf("%d: Got '%c' Addr%lx IN%d IgE%d IgC%d\n",
@@ -1832,13 +1847,13 @@ void VL_READMEM_N(bool hex,  // Hex format, else binary
                  QData end  // Last row address to read
                  ) VL_MT_SAFE {
    QData addr_max = array_lsb + depth - 1;
-    if (start < array_lsb) start = array_lsb;
+    if (start < static_cast<QData>(array_lsb)) start = array_lsb;
    QData addr_end = end;
    if (addr_end > addr_max) addr_end = addr_max;

    VlReadMem rmem(hex, bits, filename, start, end);
    if (VL_UNLIKELY(!rmem.isOpen())) return;
-    while (1) {
+    while (true) {
        QData addr;
        std::string value;
        if (rmem.get(addr /*ref*/, value/*ref*/)) {
@@ -1883,7 +1898,7 @@ void VL_WRITEMEM_N(bool hex,  // Hex format, else binary
                   QData end  // Last address to write, or ~0 when not specified
                   ) VL_MT_SAFE {
    QData addr_max = array_lsb + depth - 1;
-    if (start < array_lsb) start = array_lsb;
+    if (start < static_cast<QData>(array_lsb)) start = array_lsb;
    if (end > addr_max) end = addr_max;

    VlWriteMem wmem(hex, bits, filename, start, end);
@@ -2168,9 +2183,7 @@ void VerilatedImp::commandArgsAddGuts(int argc, const char** argv) VL_REQUIRES(s
 void VerilatedImp::commandArgVl(const std::string& arg) {
    if (0 == strncmp(arg.c_str(), "+verilator+", strlen("+verilator+"))) {
        std::string value;
-        if (0) {
-        }
-        else if (arg == "+verilator+debug") {
+        if (arg == "+verilator+debug") {
            Verilated::debug(4);
        }
        else if (commandArgVlValue(arg, "+verilator+debugi+", value/*ref*/)) {
@@ -2199,6 +2212,9 @@ void VerilatedImp::commandArgVl(const std::string& arg) {
        else if (commandArgVlValue(arg, "+verilator+seed+", value/*ref*/)) {
            Verilated::randSeed(atoi(value.c_str()));
        }
+        else if (arg == "+verilator+noassert") {
+            Verilated::assertOn(false);
+        }
        else if (arg == "+verilator+V") {
            versionDump();  // Someday more info too
            VL_FATAL_MT("COMMAND_LINE", 0, "",
@@ -3,13 +3,9 @@
 //
 // Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //*************************************************************************
 ///
@@ -83,6 +79,7 @@ class VerilatedVar;
 class VerilatedVarNameMap;
 class VerilatedVcd;
 class VerilatedVcdC;
+class VerilatedVcdSc;
 class VerilatedFst;
 class VerilatedFstC;

@@ -200,13 +197,19 @@ public:
    /// Check that the current thread ID is the same as the construction thread ID
    void check() VL_MT_UNSAFE_ONE {
        if (VL_UNCOVERABLE(m_threadid != VL_THREAD_ID())) {
-            fatal_different();  // LCOV_EXCL_LINE
+            if (m_threadid == 0) {
+                m_threadid = VL_THREAD_ID();
+            } else {
+                fatal_different();  // LCOV_EXCL_LINE
+            }
        }
    }
+    void changeThread() { m_threadid = 0; }  // Allow intentional change-of-thread
    static void fatal_different() VL_MT_SAFE;
 #else  // !VL_THREADED || !VL_DEBUG
 public:
    void check() {}
+    void changeThread() {}
 #endif
 };

@@ -313,7 +316,7 @@ private:
 public:  // But internals only - called from VerilatedModule's
    VerilatedScope();
    ~VerilatedScope();
-    void configure(VerilatedSyms* symsp, const char* prefixp, const char* suffix,
+    void configure(VerilatedSyms* symsp, const char* prefixp, const char* suffixp,
                   const char* identifier, const Type type) VL_MT_UNSAFE;
    void exportInsert(int finalize, const char* namep, void* cb) VL_MT_UNSAFE;
    void varInsert(int finalize, const char* namep, void* datap,
@@ -692,13 +695,12 @@ static inline QData  VL_CVT_Q_D(double lhs) VL_PURE {
    union { double d; QData q; } u; u.d=lhs; return u.q; }
 /// Return double from QData (numeric)
 static inline double VL_ITOR_D_I(IData lhs) VL_PURE {
-    return static_cast<double>(static_cast<vlsint32_t>(lhs)); }
+    return static_cast<double>(static_cast<vlsint32_t>(lhs));
+}
 /// Return QData from double (numeric)
-static inline IData  VL_RTOI_I_D(double lhs) VL_PURE {
-    return static_cast<vlsint32_t>(VL_TRUNC(lhs)); }
-/// Return QData from double (numeric)
-static inline IData  VL_RTOIROUND_I_D(double lhs) VL_PURE {
-    return static_cast<vlsint32_t>(VL_ROUND(lhs)); }
+static inline IData VL_RTOI_I_D(double lhs) VL_PURE {
+    return static_cast<vlsint32_t>(VL_TRUNC(lhs));
+}

 // Sign extend such that if MSB set, we get ffff_ffff, else 0s
 // (Requires clean input)
@@ -1317,6 +1319,14 @@ static inline WDataOutP VL_NEGATE_W(int words, WDataOutP owp, WDataInP lwp) VL_M
    }
    return owp;
 }
+static void VL_NEGATE_INPLACE_W(int words, WDataOutP owp_lwp) VL_MT_SAFE {
+    EData carry = 1;
+    for (int i = 0; i < words; ++i) {
+        EData word = ~owp_lwp[i] + carry;
+        carry = (word < ~owp_lwp[i]);
+        owp_lwp[i] = word;
+    }
+}

 // EMIT_RULE: VL_MUL:    oclean=dirty; lclean==clean; rclean==clean;
 // EMIT_RULE: VL_DIV:    oclean=dirty; lclean==clean; rclean==clean;
@@ -1643,18 +1653,22 @@ static inline void _VL_INSERT_WW(int, WDataOutP owp, WDataInP lwp, int hbit, int
                int oword = lword+i;
                EData d = lwp[i] << loffset;
                EData od = (owp[oword] & ~linsmask) | (d & linsmask);
-                if (oword == hword)
+                if (oword == hword) {
                    owp[oword] = (owp[oword] & ~hinsmask) | (od & hinsmask);
-                else owp[oword] = od;
+                } else {
+                    owp[oword] = od;
+                }
            }
            {   // Upper word
                int oword = lword+i+1;
                if (oword <= hword) {
                    EData d = lwp[i] >> nbitsonright;
                    EData od = (d & ~linsmask) | (owp[oword] & linsmask);
-                    if (oword == hword)
+                    if (oword == hword) {
                        owp[oword] = (owp[oword] & ~hinsmask) | (od & hinsmask);
-                    else owp[oword] = od;
+                    } else {
+                        owp[oword] = od;
+                    }
                }
            }
        }
@@ -2013,6 +2027,12 @@ static inline WDataOutP VL_SHIFTR_WWW(int obits, int lbits, int rbits,
    }
    return VL_SHIFTR_WWI(obits, lbits, 32, owp, lwp, rwp[0]);
 }
+static inline WDataOutP VL_SHIFTR_WWQ(int obits, int lbits, int rbits,
+                                      WDataOutP owp, WDataInP lwp, QData rd) VL_MT_SAFE {
+    WData rwp[VL_WQ_WORDS_E]; VL_SET_WQ(rwp, rd);
+    return VL_SHIFTR_WWW(obits, lbits, rbits, owp, lwp, rwp);
+}
+
 static inline IData VL_SHIFTR_IIW(int obits, int, int rbits, IData lhs, WDataInP rwp) VL_MT_SAFE {
    for (int i = 1; i < VL_WORDS_I(rbits); ++i) {
        if (VL_UNLIKELY(rwp[i])) {  // Huge shift 1>>32 or more
@@ -2098,6 +2118,11 @@ static inline WDataOutP VL_SHIFTRS_WWW(int obits, int lbits, int rbits,
    }
    return VL_SHIFTRS_WWI(obits, lbits, 32, owp, lwp, rwp[0]);
 }
+static inline WDataOutP VL_SHIFTRS_WWQ(int obits, int lbits, int rbits,
+                                       WDataOutP owp, WDataInP lwp, QData rd) VL_MT_SAFE {
+    WData rwp[VL_WQ_WORDS_E]; VL_SET_WQ(rwp, rd);
+    return VL_SHIFTRS_WWW(obits, lbits, rbits, owp, lwp, rwp);
+}
 static inline IData VL_SHIFTRS_IIW(int obits, int lbits, int rbits,
                                   IData lhs, WDataInP rwp) VL_MT_SAFE {
    EData overshift = 0;  // Huge shift 1>>32 or more
@@ -2222,6 +2247,49 @@ static inline WDataOutP VL_SEL_WWII(int obits, int lbits, int, int,
    return owp;
 }

+//======================================================================
+// Math needing insert/select
+
+/// Return QData from double (numeric)
+// EMIT_RULE: VL_RTOIROUND_Q_D:  oclean=dirty; lclean==clean/real
+static inline QData VL_RTOIROUND_Q_D(int bits, double lhs) VL_PURE {
+    // IEEE format: [63]=sign [62:52]=exp+1023 [51:0]=mantissa
+    // This does not need to support subnormals as they are sub-integral
+    lhs = VL_ROUND(lhs);
+    if (lhs == 0.0) return 0;
+    QData q = VL_CVT_Q_D(lhs);
+    int lsb = static_cast<int>((q >> VL_ULL(52)) & VL_MASK_Q(11)) - 1023 - 52;
+    vluint64_t mantissa = (q & VL_MASK_Q(52)) | (VL_ULL(1) << 52);
+    vluint64_t out = 0;
+    if (lsb < 0) {
+        out = mantissa >> -lsb;
+    } else if (lsb < 64) {
+        out = mantissa << lsb;
+    }
+    if (lhs < 0) out = -out;
+    return out;
+}
+static inline IData VL_RTOIROUND_I_D(int bits, double lhs) VL_PURE {
+    return static_cast<IData>(VL_RTOIROUND_Q_D(bits, lhs));
+}
+static inline WDataOutP VL_RTOIROUND_W_D(int obits, WDataOutP owp, double lhs) VL_PURE {
+    // IEEE format: [63]=sign [62:52]=exp+1023 [51:0]=mantissa
+    // This does not need to support subnormals as they are sub-integral
+    lhs = VL_ROUND(lhs);
+    VL_ZERO_W(obits, owp);
+    if (lhs == 0.0) return owp;
+    QData q = VL_CVT_Q_D(lhs);
+    int lsb = static_cast<int>((q >> VL_ULL(52)) & VL_MASK_Q(11)) - 1023 - 52;
+    vluint64_t mantissa = (q & VL_MASK_Q(52)) | (VL_ULL(1) << 52);
+    if (lsb < 0) {
+        VL_SET_WQ(owp, mantissa >> -lsb);
+    } else if (lsb < obits) {
+        _VL_INSERT_WQ(obits, owp, mantissa, lsb + 52, lsb);
+    }
+    if (lhs < 0) VL_NEGATE_INPLACE_W(VL_WORDS_I(obits), owp);
+    return owp;
+}
+
 //======================================================================
 // Range assignments

@@ -2,9 +2,11 @@
 ######################################################################
 # DESCRIPTION: Makefile commands for all verilated target files
 #
-# Copyright 2003-2020 by Wilson Snyder. Verilator 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.
+# Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+# can redistribute it and/or modify it under the terms of either the GNU
+# Lesser General Public License Version 3 or the Perl Artistic License
+# Version 2.0.
+# SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 ######################################################################

 PERL = @PERL@
@@ -86,7 +88,7 @@ LDLIBS   += $(VM_USER_LDLIBS)
 # SystemC takes minutes to optimize, thus it is off by default.
 #OPT_SLOW =
 # Fast path optimizations.  Most time is spent in these classes.
-#OPT_FAST = -O2 -fstrict-aliasing
+#OPT_FAST = -Os -fstrict-aliasing
 #OPT_FAST = -O
 #OPT_FAST =

@@ -6,13 +6,9 @@
 //
 // Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// This is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=========================================================================
 //
@@ -3,13 +3,9 @@
 //
 // Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //*************************************************************************
 ///
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -77,7 +74,7 @@ public:
    virtual void zero() const VL_OVERRIDE { *m_countp = 0; }
    // CONSTRUCTORS
    // cppcheck-suppress noExplicitConstructor
-    VerilatedCoverItemSpec(T* countp) : m_countp(countp) { *m_countp = 0; }
+    explicit VerilatedCoverItemSpec(T* countp) : m_countp(countp) { *m_countp = 0; }
    virtual ~VerilatedCoverItemSpec() VL_OVERRIDE {}
 };

@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -32,9 +29,15 @@
 /// Conditionally compile coverage code

 #ifdef VM_COVERAGE
-# define VL_IF_COVER(stmts) do { stmts ; } while(0)
+# define VL_IF_COVER(stmts) \
+    do { \
+        stmts; \
+    } while (false)
 #else
-# define VL_IF_COVER(stmts) do { if(0) { stmts ; } } while(0)
+# define VL_IF_COVER(stmts) \
+    do { \
+        if (false) { stmts; } \
+    } while (false)
 #endif

 //=============================================================================
@@ -65,10 +68,10 @@
 ///             VL_COVER_INSERT(&m_cases[i], "comment", "Coverage Case", "i", cvtToNumStr(i));
 ///     }

-#define VL_COVER_INSERT(countp,args...) \
+#define VL_COVER_INSERT(countp,...) \
    VL_IF_COVER(VerilatedCov::_inserti(countp); \
                VerilatedCov::_insertf(__FILE__, __LINE__); \
-                VerilatedCov::_insertp("hier", name(), args))
+                VerilatedCov::_insertp("hier", name(), __VA_ARGS__))

 //=============================================================================
 /// Convert VL_COVER_INSERT value arguments to strings
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -3,13 +3,9 @@
 //
 // Copyright 2009-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=========================================================================
 ///
@@ -46,8 +42,8 @@
    VL_FATAL_MT(__FILE__, __LINE__, "", \
                (std::string("%%Error: Unsupported DPI function: ")+VL_FUNC).c_str())

-#define _VL_SVDPI_WARN(message...) \
-    VL_PRINTF_MT(message)
+#define _VL_SVDPI_WARN(...) \
+    VL_PRINTF_MT(__VA_ARGS__)

 // Function requires a "context" in the import declaration
 #define _VL_SVDPI_CONTEXT_WARN() \
@@ -3,13 +3,9 @@
 //
 // Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //*************************************************************************
 ///
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -64,9 +61,12 @@ protected:
    vluint32_t m_code;  ///< Starting code number
    // CONSTRUCTORS
    VerilatedFstCallInfo(VerilatedFstCallback_t icb, VerilatedFstCallback_t fcb,
-                         VerilatedFstCallback_t changecb,
-                         void* ut, vluint32_t code)
-        : m_initcb(icb), m_fullcb(fcb), m_changecb(changecb), m_userthis(ut), m_code(code) {}
+                         VerilatedFstCallback_t changecb, void* ut)
+        : m_initcb(icb)
+        , m_fullcb(fcb)
+        , m_changecb(changecb)
+        , m_userthis(ut)
+        , m_code(1) {}
    ~VerilatedFstCallInfo() {}
 };

@@ -74,10 +74,11 @@ protected:
 // VerilatedFst

 VerilatedFst::VerilatedFst(void* fst)
-    : m_fst(fst),
-      m_fullDump(true),
-      m_scopeEscape('.') {
-    m_valueStrBuffer.reserve(64+1);  // Need enough room for quad
+    : m_fst(fst)
+    , m_fullDump(true)
+    , m_nextCode(1)
+    , m_scopeEscape('.') {
+    m_valueStrBuffer.reserve(64 + 1);  // Need enough room for quad
 }

 void VerilatedFst::open(const char* filename) VL_MT_UNSAFE {
@@ -88,10 +89,12 @@ void VerilatedFst::open(const char* filename) VL_MT_UNSAFE {
    fstWriterSetParallelMode(m_fst, 1);
 #endif
    m_curScope.clear();
+    m_nextCode = 1;

    for (vluint32_t ent = 0; ent< m_callbacks.size(); ++ent) {
        VerilatedFstCallInfo* cip = m_callbacks[ent];
-        cip->m_code = 1;
+        cip->m_code = m_nextCode;
+        // Initialize; callbacks will call decl* which update m_nextCode
        (cip->m_initcb)(this, cip->m_userthis, cip->m_code);
    }

@@ -118,9 +121,15 @@ void VerilatedFst::declDTypeEnum(int dtypenum, const char* name, vluint32_t elem
    m_local2fstdtype[dtypenum] = enumNum;
 }

-void VerilatedFst::declSymbol(vluint32_t code, const char* name,
-                              int dtypenum, fstVarDir vardir, fstVarType vartype,
-                              bool array, int arraynum, vluint32_t len) {
+void VerilatedFst::declSymbol(vluint32_t code, const char* name, int dtypenum, fstVarDir vardir,
+                              fstVarType vartype, bool array, int arraynum, vluint32_t len,
+                              vluint32_t bits) {
+
+    // Make sure deduplicate tracking increments for future declarations
+    int codesNeeded = 1 + int(bits / 32);
+    //Not supported: if (tri) codesNeeded *= 2;  // Space in change array for __en signals
+    m_nextCode = std::max(m_nextCode, code + codesNeeded);
+
    std::pair<Code2SymbolType::iterator, bool> p
        = m_code2symbol.insert(std::make_pair(code, static_cast<fstHandle>(NULL)));
    std::istringstream nameiss(name);
@@ -173,17 +182,16 @@ void VerilatedFst::declSymbol(vluint32_t code, const char* name,
 //=============================================================================
 // Callbacks

-void VerilatedFst::addCallback(
-    VerilatedFstCallback_t initcb, VerilatedFstCallback_t fullcb,
-    VerilatedFstCallback_t changecb, void* userthis) VL_MT_UNSAFE_ONE {
+void VerilatedFst::addCallback(VerilatedFstCallback_t initcb, VerilatedFstCallback_t fullcb,
+                               VerilatedFstCallback_t changecb, void* userthis) VL_MT_UNSAFE_ONE {
    m_assertOne.check();
    if (VL_UNLIKELY(isOpen())) {
-        std::string msg = (std::string("Internal: ")+__FILE__+"::"+__FUNCTION__
-                           +" called with already open file");
+        std::string msg = (std::string("Internal: ") + __FILE__ + "::" + __FUNCTION__
+                           + " called with already open file");
        VL_FATAL_MT(__FILE__, __LINE__, "", msg.c_str());
    }
-    VerilatedFstCallInfo* vci = new VerilatedFstCallInfo(initcb, fullcb, changecb, userthis, 1);
-    m_callbacks.push_back(vci);
+    VerilatedFstCallInfo* cip = new VerilatedFstCallInfo(initcb, fullcb, changecb, userthis);
+    m_callbacks.push_back(cip);
 }

 //=============================================================================
@@ -192,7 +200,7 @@ void VerilatedFst::addCallback(
 void VerilatedFst::dump(vluint64_t timeui) {
    if (!isOpen()) return;
    if (VL_UNLIKELY(m_fullDump)) {
-        m_fullDump = false;  // No need for more full dumps
+        m_fullDump = false;  // No more need for next dump to be full
        for (vluint32_t ent = 0; ent< m_callbacks.size(); ++ent) {
            VerilatedFstCallInfo* cip = m_callbacks[ent];
            (cip->m_fullcb)(this, cip->m_userthis, cip->m_code);
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -50,6 +47,7 @@ private:
    void* m_fst;
    VerilatedAssertOneThread m_assertOne;  ///< Assert only called from single thread
    bool m_fullDump;
+    vluint32_t m_nextCode;  ///< Next code number to assign
    char m_scopeEscape;
    std::string m_module;
    CallbackVec m_callbacks;  ///< Routines to perform dumping
@@ -60,12 +58,13 @@ private:
    VL_UNCOPYABLE(VerilatedFst);
    void declSymbol(vluint32_t code, const char* name,
                    int dtypenum, fstVarDir vardir, fstVarType vartype,
-                    bool array, int arraynum, vluint32_t len);
+                    bool array, int arraynum, vluint32_t len, vluint32_t bits);
    // helpers
    std::vector<char> m_valueStrBuffer;
 public:
    explicit VerilatedFst(void* fst=NULL);
    ~VerilatedFst() { if (m_fst == NULL) { fstWriterClose(m_fst); } }
+    void changeThread() { m_assertOne.changeThread(); }
    bool isOpen() const { return m_fst != NULL; }
    void open(const char* filename) VL_MT_UNSAFE;
    void flush() VL_MT_UNSAFE { fstWriterFlushContext(m_fst); }
@@ -104,32 +103,35 @@ public:
    void declBit(vluint32_t code, const char* name,
                 int dtypenum, fstVarDir vardir, fstVarType vartype,
                 bool array, int arraynum) {
-        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, 1);
+        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, 1, 1);
    }
    void declBus(vluint32_t code, const char* name,
                 int dtypenum, fstVarDir vardir, fstVarType vartype,
                 bool array, int arraynum, int msb, int lsb) {
-        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, msb - lsb + 1);
+        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, msb - lsb + 1,
+                   msb - lsb + 1);
    }
    void declDouble(vluint32_t code, const char* name,
                    int dtypenum, fstVarDir vardir, fstVarType vartype,
                    bool array, int arraynum) {
-        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, 2);
+        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, 2, 64);
    }
    void declFloat(vluint32_t code, const char* name,
                   int dtypenum, fstVarDir vardir, fstVarType vartype,
                   bool array, int arraynum) {
-        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, 1);
+        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, 1, 32);
    }
    void declQuad(vluint32_t code, const char* name,
                  int dtypenum, fstVarDir vardir, fstVarType vartype,
                  bool array, int arraynum, int msb, int lsb) {
-        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, msb - lsb + 1);
+        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, msb - lsb + 1,
+                   msb - lsb + 1);
    }
    void declArray(vluint32_t code, const char* name,
                   int dtypenum, fstVarDir vardir, fstVarType vartype,
                   bool array, int arraynum, int msb, int lsb) {
-        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, msb - lsb + 1);
+        declSymbol(code, name, dtypenum, vardir, vartype, array, arraynum, msb - lsb + 1,
+                   msb - lsb + 1);
    }

    /// Inside dumping routines, dump one signal if it has changed
@@ -167,10 +169,10 @@ public:
    void fullArray(vluint32_t code, const vluint32_t* newval, int bits) {
        chgArray(code, newval, bits); }

-    void declTriBit   (vluint32_t code, const char* name, int arraynum);
-    void declTriBus   (vluint32_t code, const char* name, int arraynum, int msb, int lsb);
-    void declTriQuad  (vluint32_t code, const char* name, int arraynum, int msb, int lsb);
-    void declTriArray (vluint32_t code, const char* name, int arraynum, int msb, int lsb);
+    void declTriBit(vluint32_t code, const char* name, int arraynum);
+    void declTriBus(vluint32_t code, const char* name, int arraynum, int msb, int lsb);
+    void declTriQuad(vluint32_t code, const char* name, int arraynum, int msb, int lsb);
+    void declTriArray(vluint32_t code, const char* name, int arraynum, int msb, int lsb);
    void fullTriBit(vluint32_t code, const vluint32_t newval, const vluint32_t newtri);
    void fullTriBus(vluint32_t code, const vluint32_t newval, const vluint32_t newtri, int bits);
    void fullTriQuad(vluint32_t code, const vluint64_t newval, const vluint32_t newtri, int bits);
@@ -198,7 +200,9 @@ class VerilatedFstC {
    VL_UNCOPYABLE(VerilatedFstC);
 public:
    explicit VerilatedFstC(void* filep=NULL) : m_sptrace(filep) {}
-    ~VerilatedFstC() {}
+    ~VerilatedFstC() { close(); }
+    /// Routines can only be called from one thread; allow next call from different thread
+    void changeThread() { spTrace()->changeThread(); }
 public:
    // ACCESSORS
    /// Is file open?
@@ -3,13 +3,9 @@
 //
 // Copyright 2010-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //*************************************************************************
 ///
@@ -37,10 +33,10 @@
 //===================================================================
 // String formatters (required by below containers)

-extern std::string VL_TO_STRING(CData obj);
-extern std::string VL_TO_STRING(SData obj);
-extern std::string VL_TO_STRING(IData obj);
-extern std::string VL_TO_STRING(QData obj);
+extern std::string VL_TO_STRING(CData lhs);
+extern std::string VL_TO_STRING(SData lhs);
+extern std::string VL_TO_STRING(IData lhs);
+extern std::string VL_TO_STRING(QData lhs);
 inline std::string VL_TO_STRING(const std::string& obj) { return "\"" + obj + "\""; }
 extern std::string VL_TO_STRING_W(int words, WDataInP obj);

@@ -162,7 +158,7 @@ public:
    int next(T_Key& indexr) const {
        typename Map::const_iterator it = m_map.find(indexr);
        if (VL_UNLIKELY(it == m_map.end())) return 0;
-        it++;
+        ++it;
        if (VL_UNLIKELY(it == m_map.end())) return 0;
        indexr = it->first;
        return 1;
@@ -221,7 +217,7 @@ void VL_READMEM_N(bool hex, int bits, const std::string& filename,
                  VlAssocArray<T_Key, T_Value>& obj, QData start, QData end) VL_MT_SAFE {
    VlReadMem rmem(hex, bits, filename, start, end);
    if (VL_UNLIKELY(!rmem.isOpen())) return;
-    while (1) {
+    while (true) {
        QData addr;
        std::string data;
        if (rmem.get(addr /*ref*/, data /*ref*/)) {
@@ -245,11 +241,12 @@ void VL_WRITEMEM_N(bool hex, int bits, const std::string& filename,
 }

 //===================================================================
-// Verilog queue container
+// Verilog queue and dynamic array container
 // There are no multithreaded locks on this; the base variable must
 // be protected by other means
 //
 // Bound here is the maximum size() allowed, e.g. 1 + SystemVerilog bound
+// For dynamic arrays it is always zero
 template <class T_Value, size_t T_MaxSize = 0> class VlQueue {
 private:
    // TYPES
@@ -279,6 +276,21 @@ public:
    void clear() { m_deque.clear(); }
    void erase(size_t index) { if (VL_LIKELY(index < m_deque.size())) m_deque.erase(index); }

+    // Dynamic array new[] becomes a renew()
+    void renew(size_t size) {
+        clear();
+        m_deque.resize(size, atDefault());
+    }
+    // Dynamic array new[]() becomes a renew_copy()
+    void renew_copy(size_t size, const VlQueue<T_Value,T_MaxSize>& rhs) {
+        if (size == 0) {
+            clear();
+        } else {
+            *this = rhs;
+            m_deque.resize(size, atDefault());
+        }
+    }
+
    // function void q.push_front(value)
    void push_front(const T_Value& value) {
        m_deque.push_front(value);
@@ -304,6 +316,7 @@ public:
    // because we need to be able to insert only when the value is set
    T_Value& at(size_t index) {
        static T_Value s_throwAway;
+        // Needs to work for dynamic arrays, so does not use T_MaxSize
        if (VL_UNLIKELY(index >= m_deque.size())) {
            s_throwAway = atDefault();
            return s_throwAway;
@@ -313,6 +326,7 @@ public:
    // Accessing. Verilog: v = assoc[index]
    const T_Value& at(size_t index) const {
        static T_Value s_throwAway;
+        // Needs to work for dynamic arrays, so does not use T_MaxSize
        if (VL_UNLIKELY(index >= m_deque.size())) return atDefault();
        else return m_deque[index];
    }
@@ -441,4 +455,10 @@ inline IData VL_CMP_NN(const std::string& lhs, const std::string& rhs, bool igno

 extern IData VL_ATOI_N(const std::string& str, int base) VL_PURE;

+//======================================================================
+// Dumping
+
+extern const char* vl_dumpctl_filenamep(bool setit = false,
+                                        const std::string& filename = "") VL_MT_SAFE;
+
 #endif  // Guard
@@ -3,13 +3,9 @@
 //
 // Copyright 2009-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=========================================================================
 ///
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -187,7 +184,7 @@ void VerilatedSave::flush() VL_MT_UNSAFE_ONE {
    m_assertOne.check();
    if (VL_UNLIKELY(!isOpen())) return;
    vluint8_t* wp = m_bufp;
-    while (1) {
+    while (true) {
        ssize_t remaining = (m_cp - wp);
        if (remaining==0) break;
        errno = 0;
@@ -216,7 +213,7 @@ void VerilatedRestore::fill() VL_MT_UNSAFE_ONE {
    m_endp = m_bufp + (m_endp - m_cp);
    m_cp = m_bufp;  // Reset buffer
    // Read into buffer starting at m_endp
-    while (1) {
+    while (true) {
        ssize_t remaining = (m_bufp+bufferSize() - m_endp);
        if (remaining==0) break;
        errno = 0;
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2012-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2000-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -3,13 +3,9 @@
 //
 // Copyright 2009-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //*************************************************************************
 ///
@@ -3,13 +3,9 @@
 //
 // Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //*************************************************************************
 ///
@@ -3,13 +3,9 @@
 //
 // Copyright 2003-2020 by Wilson Snyder. This program is free software; you can
 // redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License.
+// Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //*************************************************************************
 ///
@@ -1,16 +1,11 @@
 // -*- mode: C++; c-file-style: "cc-mode" -*-
 //=============================================================================
 //
-// THIS MODULE IS PUBLICLY LICENSED
-//
-// Copyright 2012-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2012-2020 by Wilson Snyder. This program is free software; you can
+// redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -41,7 +36,8 @@ VlMTaskVertex::VlMTaskVertex(vluint32_t upstreamDepCount)
 // VlWorkerThread

 VlWorkerThread::VlWorkerThread(VlThreadPool* poolp, bool profiling)
-    : m_ready_size(0)
+    : m_waiting(false)
+    , m_ready_size(0)
    , m_poolp(poolp)
    , m_profiling(profiling)
    , m_exiting(false)
@@ -63,7 +59,7 @@ void VlWorkerThread::workerLoop() {
    ExecRec work;
    work.m_fnp = NULL;

-    while (1) {
+    while (true) {
        if (VL_LIKELY(!work.m_fnp)) {
            dequeWork(&work);
        }
@@ -173,12 +169,12 @@ void VlThreadPool::profileDump(const char* filenamep, vluint64_t ticksElapsed) {
            VlMTaskVertex::yields());

    vluint32_t thread_id = 0;
-    for (ProfileSet::iterator pit = m_allProfiles.begin();
+    for (ProfileSet::const_iterator pit = m_allProfiles.begin();
         pit != m_allProfiles.end(); ++pit) {
        ++thread_id;

        bool printing = false;  // False while in warmup phase
-        for (ProfileTrace::iterator eit = (*pit)->begin();
+        for (ProfileTrace::const_iterator eit = (*pit)->begin();
             eit != (*pit)->end(); ++eit) {
            switch (eit->m_type) {
            case VlProfileRec::TYPE_BARRIER:
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2012-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2012-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -7,15 +7,11 @@
 //
 //*************************************************************************
 //
-// Copyright 2003-2020 by Wilson Snyder.  This program is free software; you can
-// redistribute it and/or modify it under the terms of either the GNU
+// Copyright 2003-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
 // Lesser General Public License Version 3 or the Perl Artistic License
 // Version 2.0.
-//
-// Verilator is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //*************************************************************************

@@ -151,7 +147,7 @@ public:
            return (!this->operator==(other));
        }
        void advanceUntilValid() {
-            while (1) {
+            while (true) {
                if (m_bit != m_setp->m_bucketsp[m_bucketIdx].end()) {
                    // Valid iterator in this bucket; we're done.
                    return;
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -57,8 +54,8 @@ class VerilatedVcdSingleton {
 private:
    typedef std::vector<VerilatedVcd*> VcdVec;
    struct Singleton {
-        VerilatedMutex  s_vcdMutex;  ///< Protect the singleton
-        VcdVec          s_vcdVecp VL_GUARDED_BY(s_vcdMutex);  ///< List of all created traces
+        VerilatedMutex s_vcdMutex;  ///< Protect the singleton
+        VcdVec s_vcdVecp VL_GUARDED_BY(s_vcdMutex);  ///< List of all created traces
    };
    static Singleton& singleton() { static Singleton s; return s; }
 public:
@@ -96,16 +93,19 @@ public:
 class VerilatedVcdCallInfo {
 protected:
    friend class VerilatedVcd;
-    VerilatedVcdCallback_t      m_initcb;       ///< Initialization Callback function
-    VerilatedVcdCallback_t      m_fullcb;       ///< Full Dumping Callback function
-    VerilatedVcdCallback_t      m_changecb;     ///< Incremental Dumping Callback function
-    void*               m_userthis;     ///< Fake "this" for caller
-    vluint32_t          m_code;         ///< Starting code number
+    VerilatedVcdCallback_t m_initcb;  ///< Initialization Callback function
+    VerilatedVcdCallback_t m_fullcb;  ///< Full Dumping Callback function
+    VerilatedVcdCallback_t m_changecb;  ///< Incremental Dumping Callback function
+    void* m_userthis;  ///< Fake "this" for caller
+    vluint32_t m_code;  ///< Starting code number (set later by traceInit)
    // CONSTRUCTORS
    VerilatedVcdCallInfo(VerilatedVcdCallback_t icb, VerilatedVcdCallback_t fcb,
-                         VerilatedVcdCallback_t changecb,
-                         void* ut, vluint32_t code)
-        : m_initcb(icb), m_fullcb(fcb), m_changecb(changecb), m_userthis(ut), m_code(code) {}
+                         VerilatedVcdCallback_t changecb, void* ut)
+        : m_initcb(icb)
+        , m_fullcb(fcb)
+        , m_changecb(changecb)
+        , m_userthis(ut)
+        , m_code(1) {}
    ~VerilatedVcdCallInfo() {}
 };

@@ -116,7 +116,7 @@ protected:

 bool VerilatedVcdFile::open(const std::string& name) VL_MT_UNSAFE {
    m_fd = ::open(name.c_str(), O_CREAT|O_WRONLY|O_TRUNC|O_LARGEFILE|O_NONBLOCK|O_CLOEXEC, 0666);
-    return (m_fd>=0);
+    return m_fd >= 0;
 }

 void VerilatedVcdFile::close() VL_MT_UNSAFE {
@@ -133,7 +133,10 @@ ssize_t VerilatedVcdFile::write(const char* bufp, ssize_t len) VL_MT_UNSAFE {
 // Opening/Closing

 VerilatedVcd::VerilatedVcd(VerilatedVcdFile* filep)
-    : m_isOpen(false), m_rolloverMB(0), m_modDepth(0), m_nextCode(1) {
+    : m_isOpen(false)
+    , m_rolloverMB(0)
+    , m_modDepth(0)
+    , m_nextCode(1) {
    // Not in header to avoid link issue if header is included without this .cpp file
    m_fileNewed = (filep == NULL);
    m_filep = m_fileNewed ? new VerilatedVcdFile : filep;
@@ -156,7 +159,7 @@ void VerilatedVcd::open(const char* filename) {
    if (isOpen()) return;

    // Set member variables
-    m_filename = filename;
+    m_filename = filename;  // "" is ok, as someone may overload open
    VerilatedVcdSingleton::pushVcd(this);

    // SPDIFF_OFF
@@ -230,9 +233,10 @@ void VerilatedVcd::makeNameMap() {
    deleteNameMap();
    m_nextCode = 1;
    m_namemapp = new NameMap;
-    for (vluint32_t ent = 0; ent< m_callbacks.size(); ent++) {
+    for (vluint32_t ent = 0; ent < m_callbacks.size(); ent++) {
        VerilatedVcdCallInfo* cip = m_callbacks[ent];
        cip->m_code = m_nextCode;
+        // Initialize; callbacks will call decl* which update m_nextCode
        (cip->m_initcb)(this, cip->m_userthis, cip->m_code);
    }

@@ -360,7 +364,7 @@ void VerilatedVcd::bufferFlush() VL_MT_UNSAFE_ONE {
    m_assertOne.check();
    if (VL_UNLIKELY(!isOpen())) return;
    char* wp = m_wrBufp;
-    while (1) {
+    while (true) {
        ssize_t remaining = (m_writep - wp);
        if (remaining==0) break;
        errno = 0;
@@ -513,7 +517,7 @@ void VerilatedVcd::dumpHeader() {

    printIndent(-1);
    printStr("$enddefinitions $end\n\n\n");
-    assert(m_modDepth==0);
+    assert(m_modDepth == 0);

    // Reclaim storage
    deleteNameMap();
@@ -529,12 +533,12 @@ void VerilatedVcd::declare(vluint32_t code, const char* name, const char* wirep,
    if (!code) { VL_FATAL_MT(__FILE__, __LINE__, "",
                             "Internal: internal trace problem, code 0 is illegal"); }

-    int bits = ((msb>lsb)?(msb-lsb):(lsb-msb))+1;
-    int codesNeeded = 1+int(bits/32);
+    int bits = ((msb > lsb) ? (msb - lsb) : (lsb - msb)) + 1;
+    int codesNeeded = 1 + int(bits / 32);
    if (tri) codesNeeded *= 2;  // Space in change array for __en signals

    // Make sure array is large enough
-    m_nextCode = std::max(m_nextCode, code+codesNeeded);
+    m_nextCode = std::max(m_nextCode, code + codesNeeded);
    if (m_sigs.capacity() <= m_nextCode) {
        m_sigs.reserve(m_nextCode*2);  // Power-of-2 allocation speeds things up
    }
@@ -658,19 +662,16 @@ void VerilatedVcd::fullFloat(vluint32_t code, const float newval) {
 //=============================================================================
 // Callbacks

-void VerilatedVcd::addCallback(
-    VerilatedVcdCallback_t initcb, VerilatedVcdCallback_t fullcb, VerilatedVcdCallback_t changecb,
-    void* userthis) VL_MT_UNSAFE_ONE
-{
+void VerilatedVcd::addCallback(VerilatedVcdCallback_t initcb, VerilatedVcdCallback_t fullcb,
+                               VerilatedVcdCallback_t changecb, void* userthis) VL_MT_UNSAFE_ONE {
    m_assertOne.check();
    if (VL_UNLIKELY(isOpen())) {
-        std::string msg = std::string("Internal: ")+__FILE__+"::"+__FUNCTION__
-            +" called with already open file";
+        std::string msg = std::string("Internal: ") + __FILE__ + "::" + __FUNCTION__
+                          + " called with already open file";
        VL_FATAL_MT(__FILE__, __LINE__, "", msg.c_str());
    }
-    VerilatedVcdCallInfo* vci
-        = new VerilatedVcdCallInfo(initcb, fullcb, changecb, userthis, m_nextCode);
-    m_callbacks.push_back(vci);
+    VerilatedVcdCallInfo* cip = new VerilatedVcdCallInfo(initcb, fullcb, changecb, userthis);
+    m_callbacks.push_back(cip);
 }

 //=============================================================================
@@ -680,7 +681,7 @@ void VerilatedVcd::dumpFull(vluint64_t timeui) {
    m_assertOne.check();
    dumpPrep(timeui);
    Verilated::quiesce();
-    for (vluint32_t ent = 0; ent< m_callbacks.size(); ent++) {
+    for (vluint32_t ent = 0; ent < m_callbacks.size(); ent++) {
        VerilatedVcdCallInfo* cip = m_callbacks[ent];
        (cip->m_fullcb)(this, cip->m_userthis, cip->m_code);
    }
@@ -690,7 +691,7 @@ void VerilatedVcd::dump(vluint64_t timeui) {
    m_assertOne.check();
    if (!isOpen()) return;
    if (VL_UNLIKELY(m_fullDump)) {
-        m_fullDump = false;  // No need for more full dumps
+        m_fullDump = false;  // No more need for next dump to be full
        dumpFull(timeui);
        return;
    }
@@ -700,7 +701,7 @@ void VerilatedVcd::dump(vluint64_t timeui) {
    }
    dumpPrep(timeui);
    Verilated::quiesce();
-    for (vluint32_t ent = 0; ent< m_callbacks.size(); ++ent) {
+    for (vluint32_t ent = 0; ent < m_callbacks.size(); ++ent) {
        VerilatedVcdCallInfo* cip = m_callbacks[ent];
        (cip->m_changecb)(this, cip->m_userthis, cip->m_code);
    }
@@ -829,6 +830,7 @@ main() {
 #endif

 //********************************************************************
+// ;compile-command: "mkdir -p ../test_dir && cd ../test_dir && c++ -DVERILATED_VCD_TEST ../include/verilated_vcd_c.cpp -o verilated_vcd_c && ./verilated_vcd_c && cat test.vcd"
+//
 // Local Variables:
-// compile-command: "mkdir -p ../test_dir && cd ../test_dir && c++ -DVERILATED_VCD_TEST ../include/verilated_vcd_c.cpp -o verilated_vcd_c && ./verilated_vcd_c && cat test.vcd"
 // End:
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
@@ -103,9 +100,9 @@ private:
    typedef std::vector<VerilatedVcdSig>  SigVec;
    SigVec              m_sigs;         ///< Pointer to signal information
    typedef std::vector<VerilatedVcdCallInfo*>  CallbackVec;
-    CallbackVec         m_callbacks;    ///< Routines to perform dumping
+    CallbackVec m_callbacks;  ///< Routines to perform dumping
    typedef std::map<std::string,std::string>  NameMap;
-    NameMap*            m_namemapp;     ///< List of names for the header
+    NameMap* m_namemapp;  ///< List of names for the header

    VerilatedAssertOneThread m_assertOne;  ///< Assert only called from single thread

@@ -159,6 +156,8 @@ private:
 public:
    explicit VerilatedVcd(VerilatedVcdFile* filep = NULL);
    ~VerilatedVcd();
+    /// Routines can only be called from one thread; allow next call from different thread
+    void changeThread() { m_assertOne.changeThread(); }

    // ACCESSORS
    /// Set size in megabytes after which new file should be created
@@ -445,7 +444,9 @@ class VerilatedVcdC {
 public:
    explicit VerilatedVcdC(VerilatedVcdFile* filep = NULL)
        : m_sptrace(filep) {}
-    ~VerilatedVcdC() {}
+    ~VerilatedVcdC() { close(); }
+    /// Routines can only be called from one thread; allow next call from different thread
+    void changeThread() { spTrace()->changeThread(); }
 public:
    // ACCESSORS
    /// Is file open?
@@ -3,14 +3,11 @@
 //
 // THIS MODULE IS PUBLICLY LICENSED
 //
-// Copyright 2001-2020 by Wilson Snyder.  This program is free software;
-// you can redistribute it and/or modify it under the terms of either the GNU
-// Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
-//
-// This is distributed in the hope that it will be useful, but WITHOUT ANY
-// WARRANTY; without even the implied warranty of MERCHANTABILITY or
-// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-// for more details.
+// Copyright 2001-2020 by Wilson Snyder. This program is free software; you
+// can redistribute it and/or modify it under the terms of either the GNU
+// Lesser General Public License Version 3 or the Perl Artistic License
+// Version 2.0.
+// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
 //
 //=============================================================================
 ///
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Wilson Snyder	d3797ade95	Version bump	2020-04-04 08:40:47 -04:00
Wilson Snyder	19b472cf0b	Internals: Cleanup unused nodep in visitors. No functional change intended.	2020-04-04 08:31:14 -04:00
Wilson Snyder	38a31ae168	Cleanup misc clang-tidy warnings. No functional change intended	2020-04-03 22:31:54 -04:00
Wilson Snyder	27516b565d	Commentary	2020-04-03 20:08:24 -04:00
Wilson Snyder	c288a7bfb9	Add GCC10-style line number prefix when showing source text for errors.	2020-04-03 20:07:46 -04:00
Maciej Sobkowski	b44cd57866	Add myself to CONTRIBUTORS, #2223	2020-04-03 18:06:48 -04:00
Wilson Snyder	b88a7f5152	Commentary - sort names.	2020-04-03 17:59:19 -04:00
Marco Widmer	7f9aa057bf	Support split_var in vit files (#2219 )	2020-04-03 08:08:23 -04:00
Marco Widmer	305b4f3c75	Fix configuration file documentation (#2221 )	2020-04-02 17:32:06 -04:00
Wilson Snyder	6f4a8fe695	Fix Travis-CI failures.	2020-04-02 09:22:10 -04:00
Wilson Snyder	8aec436b5e	Commentary	2020-04-02 08:26:06 -04:00
Wilson Snyder	aef2b7ea3c	Internals: clang-format cleanup. No functional change.	2020-04-02 08:25:44 -04:00
Wilson Snyder	dcde026bac	With --Wpedantic, report forward typedefs that are unused.	2020-04-02 07:39:14 -04:00
Wilson Snyder	926209706f	Report REALCVT on $display format mistakes.	2020-04-01 20:42:47 -04:00
Wilson Snyder	bd5d4c61c6	Suppress REALCVT for small whole real numbers.	2020-04-01 19:24:07 -04:00
Wilson Snyder	19abce5535	Suppress REALCVT for whole real numbers.	2020-04-01 18:43:53 -04:00
Wilson Snyder	ab058c85bf	Fix clang warning.	2020-04-01 12:40:49 -04:00
Wilson Snyder	4361c4b57a	Add vlsint8_t types.	2020-03-31 21:30:18 -04:00
Wilson Snyder	e6beab4037	Fix implicit conversion of floats to wide integers.	2020-03-31 20:42:07 -04:00
Wilson Snyder	ebeb645539	Commentary	2020-03-30 20:09:55 -04:00
Wilson Snyder	5c72f01598	Fix assertions with unique case inside, #2199 .	2020-03-30 18:13:51 -04:00
Wilson Snyder	0cf44a9c4f	Internals: Refactor InsideRange common code. No functional change intended.	2020-03-30 18:12:50 -04:00
Sean Cross	1fe5d5db79	Fix mingw build (#2215 ) * v3Os: include <windows.h> instead of <winnt.h> The windows.h header file should be included prior to any other headers, in order to ensure all definitions are available. By only including some headers, such as winnt.h, many "undefined symbol" messages are generated. Include "windows.h" to fix the build on msys2 under mingw64. Signed-off-by: Sean Cross <[email protected]> * configure: check for bcrypt and psapi on windows These two libraries must be linked in order to have access to BCryptGenRandom and GetProcessMemoryInfo respectively. Signed-off-by: Sean Cross <[email protected]>	2020-03-29 12:29:40 -04:00
Sean Cross	a1a2650f1e	Modernize va args (#2214 ) Verilator uses a form of variadic macros that are nonstandard, making it unable to be compiled under MSVC. Replace the old synax with the standard syntax. This fixes MSVC usage. Signed-off-by: Sean Cross <[email protected]>	2020-03-29 10:29:12 -04:00
Wilson Snyder	07d00f26aa	Fix docker exit status when Verilator fails, #2153 .	2020-03-28 19:15:06 -04:00
Wilson Snyder	8d3d185e3b	Fix docker exit status when Verilator fails, #2153 .	2020-03-28 17:25:20 -04:00
Wilson Snyder	81a63b0c7d	Commentary	2020-03-28 17:18:12 -04:00
Matthew Ballance	510be53521	Expose VPI cbNextDeadline via the public API (#2212 ) Signed-off-by: Matthew Ballance <[email protected]>	2020-03-28 13:47:21 -04:00
Wilson Snyder	4145a38c47	Fix duplicate typedefs in generate for, #2205 .	2020-03-26 18:10:20 -04:00
Wilson Snyder	590b1853d0	Fix packages as enum base types, #2202 .	2020-03-24 17:57:12 -04:00
Wilson Snyder	08a51e3e09	Fix VCD open with empty filename, #2198 .	2020-03-24 17:32:47 -04:00
Wilson Snyder	75ebe7a4be	Update gtkwave from upstream.	2020-03-21 21:45:57 -04:00
Wilson Snyder	1e0e51edd3	Fix parameter type redeclaring a type, #2195 .	2020-03-21 12:13:55 -04:00
Wilson Snyder	0ca07e4d58	Tests: Remove t_emit_memb_limit/vltmt as slow	2020-03-21 12:08:38 -04:00
Wilson Snyder	1ce360ed5b	Add SPDX license identifiers. No functional change.	2020-03-21 11:24:24 -04:00
Wilson Snyder	172583eb03	Commentary - fix error regexp, #2191 .	2020-03-17 15:39:50 -04:00
Wilson Snyder	c2b49f0174	Internals: clang-format cleanups. No functional change.	2020-03-15 23:20:33 -04:00
Wilson Snyder	92d62a6568	Internals: clang-format cleanups for V3Inline. No functional change.	2020-03-15 22:30:20 -04:00
Wilson Snyder	5d9d1cc09f	Internals: Favor const_iterator (in a few obvious spots, more needed). No functional change.	2020-03-15 18:34:09 -04:00
Wilson Snyder	57068b95ef	Internals: Move code, no functional change.	2020-03-15 13:39:36 -04:00
Wilson Snyder	5f63b24c50	Change --quiet-exit to also suppress 'Exiting due to N errors'.	2020-03-15 08:09:51 -04:00
Wilson Snyder	81c659957e	Add column numbers to errors and warnings.	2020-03-14 22:02:42 -04:00
Wilson Snyder	ee8dd32c04	Check and document error format, #2191 .	2020-03-14 21:48:26 -04:00
Wilson Snyder	0a755e6ecf	Tests: Favor use of expect_filename. No functional change.	2020-03-14 17:42:15 -04:00
Wilson Snyder	e6c91f59ab	Tests: Allow --numsets 2/2	2020-03-09 17:57:27 -04:00
Wilson Snyder	9f947bcb5f	Internals: Refactor flags in V3Undriven. No functional change intended.	2020-03-08 21:37:07 -04:00
Wilson Snyder	135ccf6595	Tests: Fix ormux on travis.	2020-03-08 09:48:13 -04:00
Wilson Snyder	9a2a3f8db7	Tests: Add t_gate_ormux, #2186 , #2187 .	2020-03-08 09:18:12 -04:00
Wilson Snyder	8ccc17f30b	Add setting VM_PARALLEL_BUILDS=1 when using --output-split, #2185 .	2020-03-08 09:03:29 -04:00
Wilson Snyder	9392eac6a7	devel release	2020-03-08 08:40:33 -04:00
Wilson Snyder	95c4b6aaba	Version bump	2020-03-08 08:38:53 -04:00
Wilson Snyder	1c1319079b	Tests: Add driver --hashset for Travis.	2020-03-07 22:02:03 -05:00
Wilson Snyder	328fef8190	Tests: Add driver --hashset for Travis.	2020-03-07 21:38:44 -05:00
Wilson Snyder	e2dec043a0	Tests: Backout part of previous commit.	2020-03-07 21:01:36 -05:00
Wilson Snyder	bd42e31b2a	Tests: For travis, skip Bit::Vector and show intall dates.	2020-03-07 20:08:41 -05:00
Wilson Snyder	6d73237b27	Travis: Don't cpan test to save time.	2020-03-07 19:24:05 -05:00
Wilson Snyder	6c6d70a5e5	Fix FST when multi-model tracing.	2020-03-07 18:39:58 -05:00
Wilson Snyder	6f49f802b1	Tests: Add fst_identical.	2020-03-07 16:59:46 -05:00
Wilson Snyder	808c958d42	Internals: Add AstNodeCCall and other items towards classes.	2020-03-07 12:52:11 -05:00
Wilson Snyder	961ac49c5c	Internals: Merge parse type from classes branch. No functional change intended.	2020-03-07 11:00:57 -05:00
Wilson Snyder	2d52f525c5	Add --structs-packed for forward compatibility, #1541 .	2020-03-07 10:51:06 -05:00
Wilson Snyder	e70cba77e6	Add support for dynamic arrays, #379 .	2020-03-07 10:24:27 -05:00
Wilson Snyder	8054fc47ea	Internals: Refectoring. No functional change intended.	2020-03-07 08:24:57 -05:00
Wilson Snyder	e673875b3b	Fix clang warning, last commit.	2020-03-06 07:31:56 -05:00
Wilson Snyder	29923b78fd	Internals: Use VL_TO_STRING instead of to_string.	2020-03-05 23:28:41 -05:00
Wilson Snyder	135cbcd79a	Internals: Move 'new' unsupported forward from parse into Ast.	2020-03-05 22:33:31 -05:00
Wilson Snyder	75ecad591a	Implement $displayb/o/h, $writeb/o/h, etc, Closes #1637 .	2020-03-05 21:49:25 -05:00
Wilson Snyder	c108f5def9	Commentary, Closes #2177 .	2020-03-05 19:09:58 -05:00
Wilson Snyder	dab1cb610a	Tests: Allow iv to run SystemVerilog tests	2020-03-05 18:12:10 -05:00
Wilson Snyder	fd656f6cc1	Fix clang asserted missing lock on m_dumping.	2020-03-03 19:20:04 -05:00
Wilson Snyder	a7e65379fa	Ignore $dumpflush, think causes travis thread error.	2020-03-02 17:56:42 -05:00
Wilson Snyder	905067d13f	Fix $dumpvar multithreaded assert, broke last commit.	2020-03-02 07:43:10 -05:00
Wilson Snyder	30a33a6104	Add support for and , #2126 .	2020-03-01 21:39:23 -05:00
Wilson Snyder	0ca0e07354	Internals: Vcd doesn't need code when registering. No functional change intended.	2020-02-29 20:42:52 -05:00
Wilson Snyder	aac02acf92	Tests: Rename	2020-02-29 10:06:52 -05:00
Wilson Snyder	082c9e0b1d	Tests: Add two-design trace tests.	2020-02-29 09:44:51 -05:00
Wilson Snyder	a7bd934fe3	Tests: Cleanup false used as 0. No functional change.	2020-02-29 08:56:49 -05:00
David Stanford	e98a380b44	Tests: Update some tests to skip if prerequisites aren't installed (#2181 )	2020-02-29 07:20:23 -05:00
Wilson Snyder	4878fe3a1f	Add split_var metacomment to assist UNOPTFLAT fixes, #2066 .	2020-02-28 19:15:08 -05:00
Wilson Snyder	c6b755a12e	Commentary	2020-02-27 19:35:49 -05:00
Wilson Snyder	991d81cd0a	Recommend -Os.	2020-02-27 07:46:34 -05:00
Wilson Snyder	c06a97a221	Remove OBJCACHE_HOSTS; dead code.	2020-02-27 07:18:15 -05:00
Wilson Snyder	6131bcdbb0	Verilator_gantt: Fix CPU count in report.	2020-02-27 07:12:50 -05:00
Wilson Snyder	68b6a0b667	Fix genblk naming with directly nested generate blocks, #2176 .	2020-02-25 22:21:16 -05:00
Wilson Snyder	4c438bbc67	Commentary	2020-02-25 19:01:14 -05:00
Wilson Snyder	5b83484f20	Remove dead genblk code & some cleanups.	2020-02-25 18:57:51 -05:00
Wilson Snyder	93ac79981b	Tests: Rename t_var_dotted. No functional change.	2020-02-24 18:51:44 -05:00
Wilson Snyder	c9b74847d1	Docs: Tighter margins, save 10 pages.	2020-02-24 18:11:56 -05:00
Wilson Snyder	23eb96579c	Fix duplicate __STDC_FORMAT_MACROS definition.	2020-02-24 18:11:41 -05:00
Todd Strader	8319ea6c73	Changes	2020-02-24 06:36:13 -05:00
Todd Strader	60f82961b4	De-tabify	2020-02-24 06:36:13 -05:00
Todd Strader	f7d1c6ca72	emacs verilog-batch-indent	2020-02-24 06:36:13 -05:00
Todd Strader	4b4f10f5e6	Follow other clock gating examples	2020-02-24 06:36:13 -05:00
Todd Strader	120f62fe85	Fix is probably to mark as a clock	2020-02-24 06:36:13 -05:00
Todd Strader	db6ecbd57e	Test for #2169	2020-02-24 06:36:13 -05:00
Wilson Snyder	28e19cef90	Fix undeclared VL_SHIFTR_WWQ, #2114 .	2020-02-23 19:33:37 -05:00
Tobias Wölfel	18f8cd0529	Allow assert disable (#2168 ) * Add +verilator+noassert flag This allows to disable the assert check per simulation argument. * Add AssertOn check for assert Insert the check AssertOn to allow disabling of asserts. Asserts can be disabled by not using the `--assert` flag or by calling `AssertOn(false)`, or passing the "+verilator+noassert" runtime flag. Add tests for this behavior. Bad tests check that the assert still causes a stop. Non bad tests check that asserts are properly disabled and cause no stop of the simulation. Fixes #2162. Signed-off-by: Tobias Wölfel <[email protected]> * Correct file location Signed-off-by: Tobias Wölfel <[email protected]> * Add description for single test execution Without this description it is not obvious how to run a single test from the regression test suite. Signed-off-by: Tobias Wölfel <[email protected]>	2020-02-15 18:17:23 -06:00
Wilson Snyder	02786b3f09	Commentary	2020-02-12 22:46:59 -05:00
Wilson Snyder	70358e8587	Fix compiler warning.	2020-02-08 10:58:07 -05:00
Wilson Snyder	95b66feeb8	devel release	2020-02-08 09:16:35 -05:00