All the methods that this structure supported are now pulled
into the __vpiHandle class as virtual methods. This includes
the vpi_free_object_ method, which required some extra trickery.
Instead of C-like data structures where the __vpiHandle base is a
leading member, make the __vpiHandle a derived class. Give the base
class a virtual destructor so that dynamic_cast works reliably, and
now pretty much all of the junk for testing if an object really is
of the derived class goes away. Also, problems with casting up to
a vpiHandle become trivial non-issues.
Full vector assigns are able to short circuit the propagation of
the value if it finds that there are no value changes. This patch
supports that behavior in writes to parts as well. Put this change
to use in logic devices as well.
Not all the lex/yacc (flex/bison) targets were using a consistent syntax.
This patch fixes that and explicitly serializes the *.c/*.cc and *.h build.
Not doing this was causing problem when using make -j. The issue appears to
be that if two targets are specified for a rule (e.g. file.cc file.h: file.y)
make does not realize they are both built by the same call so the rule is
executed twice. Once for the .cc target and once for the .h target. This is
not a problem for a serial build. To work around this only use the .c/.cc
file in the main target and then make the .h file depend on the .c/.cc file
as a sub-target.
Now we have a code generator that can handle compressed assignments
as they have been re-imagined in elaboration. There are some cases
that are not yet supported, we'll patch them up in due course.
Both UDPs and system functions use the wide input functor. This patch
modified the code generator to create a local net declaration for the
output net if we have either a delay or modpath connecting the output
to the true output. This is needed so that the wide input can be
cleaned up correctly.
Local real nets were also added to the local net pool when testing with
valgrind. This allows them to be cleaned up at the end.
For a delay we do not know exactly what type we will be propagating
until the initialization event has happened. Because of this we
allocate both a vec4 and a vec8 value. Once the initialization event
has happened we can free the unneeded element(s).
When scaling a time value we would often use the power operator to
create constants 10**-N that were then multiplied with the original
value. The problem with this is that there is some errors in the
representation of the fractional number. It is better to create a
integer value 10**N and then divide the original value by this
exact constant. You still have the calculation error, but the scale
value is now an exactly real value.
The name is not currently used, but when it is it makes sense for it to
be in the base class. Also the name cannot be deleted after compiling
since it may be used later.
The VPI object data model diagrams show a one to many relationship
between the "mod path" and "path term" objects. This means that the
correct way to obtain handles to "path term" objects is to use the
vpi_iterate and vpi_scan functions.
Support for the old method of obtaining handles to "path term" objects
using the vpi_handle function is retained for backwards compatibility.
The standard defines how to calculate the name for an access function
or iterator if one is not given. It is supposed to be vpi followed by
the words in the name with each word capitalized. For the one to many
(iterator) interface from the enumeration typespec to the individual
constants this is vpiEnumConst not vpiMember.
We don't currently have the information needed to correctly provide the
base typespec, but in the next() and prev() methods I need to know if
the enumeration is two or four state. This patch sets the base typespec
for four state enumerations to vpiReg and to vpiBitVar for two state
enumerations. This provide enough information to get next() and prev()
working correctly.
This patch adds vpiEnumTypespec to the list so that vpi_get_str(vpiType, ...)
returns an appropriate string when an enum type is passed.
It also adds the initial hook to allow iteration (global) over the UDP
definitions. This along with table traversal will be needed to free the
memory allocated when the UDP definition is created. Ultimately this
will all the UDP test to be valgrind clean.
Update the line number for a couple cppcheck suppressions and add one for
the pool variable in the vvp directory.
Also move a check for null to the correct place.
This patch makes the code consistently use struct/class in the C++ files,
it removes a couple shadow warnings and where a class pointer is passed to
the C routines, it defines the pointer as a class for C++ and as struct for
C and it removes a namespace std duplication.
Add a new IVL_PR_FINAL process type.
Add a flag to NetScope in_final_ which is set when elaborating the
statement of a final procedure.
Add checks during statement elaboration for invalid statements in a
final procedure, similar to checks for statements in functions.
Do a final check to make sure no final blocks have delays.
In the vvp runtime, use "$final" as the flag for the thread created by
the final procedure. During compilation, instead of adding such a
thread to the sched_list, add it to a new schedule_final_list that
mirrors the schedule_init_list, but is run at the end of simulation.
Verilog allows user to define variables of primitive types. The patch
adds support for defining variables of type 'logic'. The data type
'logic' is the only primitive data type which supports defining ranges.
Signed-off-by: Prasad Joshi <prasadjoshi124@gmail.com>
Verilog allows user to define variables of primitive types. The patch
adds support for defining variables of type 'bit'. The data type 'bit'
is the only primitive data type which supports defining ranges.
Signed-off-by: Prasad Joshi <prasadjoshi124@gmail.com>
If a relative path name is passed to the Windows LoadModule function,
it is applied in turn to each path in the DLL search path. For the
ivl_dlopen function, we actually want to mimic the Unix behaviour,
where a relative path is relative to the current working directory.
On systems where the KB2264107 security fix has been applied, the
CWD is excluded from the DLL search path, so we no longer get the
required behaviour. This patch reworks the ivl_dlopen function to
give the correct behaviour under Windows.
This patch also adds a flush of the stderr stream after reporting
VPI call errors. This fixes a race between the stdout and stderr
streams when running the regression tests in a MinGW shell.
Added an explicit option prefix="yy" to files that were generated
without an explicit -P.
This makes the lex-generated symbol names self contained without any
help from from build system.
The power operator defines 2**-1 and -2**-1 to be zero. This patch fixes
both the procedural and continuous assignments to work correctly. It also
fixes a problem in the compiler power code so that the one constant value
always has at least two bits.
This patch adds some preliminary module port information to the ivl
interface. This may change as I investigate exactly what is needed.
It also fixes a few minor bugs (a missed local variable and spacing)
This patch adds a trace command to the interactive prompt that can be
used to control statement tracing when the code is instrumented (has
%file_line opcodes).
This patch adds support for tracing procedural statement execution in vvp.
This is accomplished by adding a new opcode that is inserted before the
code that represents a procedural statement. These opcodes also trigger
a message whenever time advances. By default these opcodes are not added.
To add them, pass the -pfileline=1 flag to the compiler. In the future we
may add support for turning the debug output on and off once the opcodes
have been added with a system task or from the interactive prompt.
Currently the vvp target emits multiple single bit %mov instructions
to perform sign extension. This patch adds a new %pad instruction
that allows sign extension to be performed with just one instruction.
This patch fixes a few compilation warnings introduced by the
enumeration code. It also updates the ivl.def file so that the
proper routines get exported under windows.
Create the v2009.vpi module to include SystemVerilog core
functions, and start out with some of the enum methods.
Add to vvp support for creating enum types, including some
vpi access methods.
In ivl_alloc.h we redefine malloc(), realloc() and calloc() to have
standard error checking. We don't want to do this for anything that
comes from the standard headers. This specifically doesn't work if
a C++ header files does std::malloc, etc.
Also change to -W instead of -Wextra since that is more portable. I
plan to add a check from -Wextra and use it when available since it
is more descriptive.
This patch changes all the iterator code to use a prefix ++ instead
of postfix since it is more efficient (no need for a temporary). It
is likely that the compiler could optimize this away, but lets make
it efficient from the start.
BOOL values have a specific cast from LOGIC, this node takes care
of it. Also arrange for the elaboration to insert them in the right
planes and for the code generator to generate them.
This patch adds -Wextra to the compilation flags for C++ files in
the vvp and vpi subdirectories. It also fixes all the problems
found while adding -Wextra. This mostly entailed removing some of
the unused arguments, removing the name for others and using the
correct number of initializers.
This patch adds support for running cppcheck from the Makefile. It also
standardizes the order of some of the targets. It renames vpip_format.c
to vpip_format.cc and fixes the size of the array tables to make room
for the trailing NULL. Found when using a C++ compiler.
This patch adds a few missing initializations to various constructors
in the vvp directory. It also enhances the array alias code to copy
more values from the aliased array.
Create the .var/2u and .var/2s variable records and give them
basic implementations. Make available to VPI the proper types
for the SystemVerilog types that these variables represent.
This patch adds support for a UDP with variable delays. In the process the
intrinsic support for delays was removed from the UDP functor and replaced
with a call to the .delay functor. Both a normal gate and a UDP now use the
same code to generate the delay.
This patch adds checks that the delay count is correct for the
various gates and adds support for a missing variable decay
time. For this case the decay time is the minimum of the rise
and fall times. This is denoted by setting the decay variable
to 0 in the vvp file. vvp notes this and sets an ignore decay
time property in the base delay. This turns off the ability
to set the decay time and the minimum delay calculation will
also update the decay time.
Elaborate conditional assignments with BUFZ devices that do *NOT*
preserve strengths. Add a BUFT (transparent) device that can be
used in those cases where I really need a transparent buffer.
A real delay must be scaled and rounded using the local precision
before it is finally scaled to the simulation time units. This
patch fixes the compiler to do this correctly or generate the
correct code for run time calculated delays. Delays in a CA
already worked correctly. The run time was also fixed to scale
modpath (SDF back annotation) delays correctly.
Stephen Williams
Martin Whitaker
Cary R
Alexander Klimov
Jared Casper
Prasad Joshi
Martin Whitaker
Greg Steuck
Larry Doolittle