This patch adds a new system function $vvp_cpu_wordsize. It returns
the size of the underlying CPU word (long) in bits. This function
can be used to write fully portable tests for the test suite. Other
functions will be added as needed.
The sys_funcs table should be left to those functions that are handled
internally by the compiler. Really, the internal sys_funcs table is a
legacy from the days before the compiler supported system function
tables in the .sft format.
This patch implements the System Verilog $urandom() and $urandom_range()
functions. There are no check to verify that $urandom_range is only given
unsigned arguments. If you give it a negative value the bit pattern will
be interpreted as a unsigned number.
Add the missing probabilistic functions and add compiletf routines
for all the functions. The original calltf routines have been
modified as appropriate. The base functions are straight copies
from the standard. I have visually verified the curves with 5,000
points and they look correct.
Cary R
Stephen Williams
steve