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.
System functions used in a continuous assignment must be defined
in the system function table since the name of the system functions
is kept in this definition. The default name is NULL which causes
problems. This patch add $rtoi to the system table and adds a check
for a NULL name.
In nets, if system functions return a real value the function lookup
was getting the correct width, but was also setting the width to 0,
which confused down-stream net handling. Real-value system fuctions
have a width of 1. (1 real-valued scalar.)
Stephen Williams
Cary R
Larry Doolittle
steve