Rather then lock/unlock the work queue ring for every item, save
tons of pthread lock manipulation by allocating to the producer
in batches. Over the long run, this doesn't change the CPU balance
or hold up either thread, but it eliminates almost 3/4 of the
lock/unlock episodes.
The time change is usually a trivial operation, so instead carry
a timestamp on all the work items and let the work thread decide
on its own when to do a SET_TIME operation. This reduces some
pthread overhead and thus gets us some better performance.
The scope contains the threads running within. The rework of this
patch allows all threads to know their scope, and cleans up the
handling of threads listed in the scope.
The padding for a signal select was using the signal to determine
if the padding should be singed or not. In reality this should be
unsigned padding unless the select was enclosed in a $signed().
dlltool which is used by both MinGW and Cygwin to create dynamic
libraries must have the name of the executable it creates the
library/information from exactly match the installed executable
name. If we have a suffix then it must be used. This patch adds
that to the build process for vvp since it can be installed with
a suffix. It also modifies the check routines since you must run
vvp with a suffix if the library it links to was built for a
suffixed executable.
In combination with the patch to make all operations on thread words
operate on 64-bit values, this patch ensures casts between real values
and large vector values work correctly.
The vvp thread word storage had previously been changed to always store
64-bit values, but some instructions still only operate on native long
values. This patch ensures all instructions that modify thread words
support 64-bit values.
When passing an argument to a user function in a continuous assignment
we need to sign extend the value if it is signed and too short. We need
to crop an argument if it is too long.
When evaluating a function argument expression we need to use either
the expression width or the argument width which ever is larger. This
matches the way normal assignments work. We then only take the bits
needed at the end.
Newer versions of GHDL seem to be stricter when checking this than
older versions. ModelSim still accepts an incomplete with-select,
however.
This patch makes the output 'U' if none of the conditions match.
We do have one C program in the vvp directory so add CFLAGS to
the Makefile. This patch also modifies the two local programs
tables and version to use -Wall.
The function draw_scope was extracting the input/output parameters
just by looking at the (unordered) list of signals in the function
scope rather than using the ivl_scope_ports list.
The Cygwin compiler is a bit picky. This patch adds some casts
to remove compilation warnings. In the past I have had warnings
off because of problems with the STL, but for C directories
like this it makes sense to enable the warnings. It also does
not recognize that an assert(0) or assert(false) ends a routine
so it complains about no return at end of function or variables
not being defined.
The Cygwin compiler is a bit picky. This patch adds some casts
to remove compilation warnings. In the past I have had warnings
off because of problems with the STL, but we may as well get
rid of the warnings we can. It also does not recognize that an
assert(0) or assert(false) ends a routine so it complains about
no return at end of function or variables not being defined.
The Cygwin compiler is a bit picky. This patch adds some casts
to remove compilation warnings. In the past I have had warnings
off because of problems with the STL, but for C directories
like this it makes sense to enable the warnings. It also does
not recognize that an assert(0) or assert(false) ends a routine
so it complains about no return at end of function or variables
not being defined.
The Cygwin compiler is a bit picky. This patch adds some casts
to remove compilation warnings. In the past I have had warnings
off because of problems with the STL, but for this directory we
may as well squash as many warings as we can. It also does not
recognize that an assert(0) or assert(false) ends a routine so
it complains about no return at end of function or variables
not being defined.
The Cygwin compiler is a bit picky. This patch adds some casts
to remove compilation warnings. In the past I have had warnings
off because of problems with the STL, but for this directory we
mas as well remove the warnings we can. It also does not
recognize that an assert(0) or assert(false) ends a routine so
it complains about no return at end of function or variables
not being defined.
Currently the compiler only applies defparam statements that are
found in the initial root module hierarchy. This patch ensures that
defparam statements within scopes created by generate constructs or
instance arrays are also applied.
The NetEvent::find_similar_event method should limit its impact
on the netlist (and Nexus objects) by reducing the candidate event
list as it goes, instead of collecting data and testing later.
It turns out that although there was all kinds of code to manage
these members, there were no uses anywhere. It must have been a
legacy from a previous era. So remove the dead code so that it
doesn't confuse me again.
Remove some wasteful and excess scans of the Nexus of some links,
and remove dead code so we can see what we're doing. Also inline
some commonly used and trivial functions.
Child scopes need to be accessed quickly, so use O(LogN) maps for
the children instead of O(N) lists.
Also, ivl_net_const_s objects exist in huge abundance for some kinds
of designs, so put some effort into reducing their memory footprint.
Stephen Williams
Picture Elements Inc
Cary R
Martin Whitaker
Nick Gasson