Predefined macros get stored in the precompiled macro file that gets
read back in when processing library files. This means the predefined
macros get processed twice. We need to skip the check in this case.
A common use case (prior to the introduction of localparam) was to
use macros to define constant values, and to put global constant
values in an include file that gets included by each source file.
This will generate a lot of spurious warnings if we warn about all
redefinitions. Make this new option the default for -Wall.
In vvp, the __vpiSignal object holds a pointer to the scope containing
the signal. This was getting set to the current scope when the net was
finally resolved, rather than to the scope where the net was declared.
This implements and enforces the full set of rules for determining
timescales in SystemVerilog. The previous relaxation of the rules
that allowed timescales to be redefined within the compilation unit
scope has been removed. Time unit and precision redeclarations are
now recognised after a nested module declaration.
This relies on using the automatically generated name for the unit scope.
This could collide with an escaped identifier, so it would be better to
identify the scope by a reference to the PPackage object, but for now,
do it the easy way.
The compilation unit scope is now treated as a specialised form of
package (with an automatically generated name). All items declared
outside a design element are added to the current compilation unit
package. Apart from when searching for a symbol, once we get into
elaboration we can treat these just like any other package.
This adds a -u option to the driver to allow the user to specify that
they want each source file to be treated as a separate compilation
unit, and modifies the compiler to accept a list of files (either on
the command line or via a file specified by a new -F option). This
list of files is then preprocessed and parsed separately, causing all
compiler directives (including macro definitions) to only apply to the
file containing them, as required by the SystemVerilog standard.
Two fixes needed:
- when searching for a base class, we need to look in the root scope
if the base class isn't found in the scope hierarchy
- the classes in the root scope need to be stored in an ordered
list, not a map, to ensure they are elaborated in the order they
were declared. Without this, the compiler may try elaborating an
extended class before its base class is known about.
Verilog spec has a very nasty system of macros jumping from
file to file, resulting in a global macro scope. We abosolutely
MUST track macro redefinitions and warn user about them.
Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
If a thread becomes detached due to a join_any statement, that
thread must not attempt to join its parent, even if the parent
is waiting on a subsequent join statement.
This occurs when tgt-vvp attempts to generate a C4<..> constant
value with a bit width >= 65536. The actual failure occurs in the
StringHeap class, which originally supported a maximum string length
of 65535. This fix enables the StringHeap class to support any size
string (provided the system has sufficient memory).
Normally there is at most one signal attached to a vvp functor, but
due to port collapsing, there can be more than one. If these signals
are array words, we need to trigger vpi callbacks on all the associated
arrays when the functor value changes.
If there is a syntax error in the source code, pform_makegate may be
passed a null list of port connections. The error is already reported,
so we just need to ignore it.
Return and print an error if iverilog is unable to open dependencies
file. User can pass e.g path to existing directory in '-M' option,
which makes fopen to return NULL followed by crash in fclose.
Cary R
Martin Whitaker
Andrew Andrianov
Daniel Andrade
Stephen Williams
8tab