Currently, when a variable expression is passed to a system task,
the expression value is stored in thread memory. Values stored
in thread memory cannot safely be passed to $strobe or $monitor,
because the thread memory may get reused or deallocated before
the $strobe or $monitor task actually executes. As a temporary
measure, we just trap this case and terminate with a "sorry"
message. A proper fix would require the expression value to be
calculated at the time the $strobe or $monitor executes, not at
the time it is called.
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.
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.
Add support for %m, suppression '*' and a maximum field width along with
a number of other fixes/enhancements. There is still no support for
%u, %v or %z.
The vpiDecStrVal case for the get_numeric() function needs to use the
existing string width as the minimum result size. -1 can be represented as
a signed value with a width of 1. This gives a display width of -1 which
is too small for the -1 string value. This was creating valgrind issues.
In general the string value should be the minimum so this is a safe change.
(cherry picked from commit 5a9e4aaec7)
Icarus is not actually fast enough to run into this issue in a
reasonable amount of time. I discovered this by thinking about
the algorithm and verified the fix with custom code.
(cherry picked from commit 35488ac254)
snprintf() copies at most N characters, but the string may not be
terminated correctly. This patch uses sizeof() so that the snprintf()
call matches the size of the buffer and adds code to insert a NULL as
the last character of the string.
After some more thought I believe it is better for $q_full to return
'bx instead of 2 when $q_full is given an invalid id. This will make
the typical full/not full checks both return false. We still return
an error code in the status variable.
(cherry picked from commit 10b2310c52)
This patch adds the vpiDefName for a module if it is different than
the vpiName. This will be used in a future version of GTKWave.
(cherry picked from commit 085a5c8d02)
Update the dumper escaped identifier check to allow a '$'
character after the first character in a normal identifier.
(cherry picked from commit 2e0accf812)
When back annotating from a SDF file we already ignore timing checks so
we may as well ignore the COND statement that can be used with them.
Also update a few other changes from development.
Cary R
Martin Whitaker
Stephen Williams