[sv-bc] Query for sysytem function $clog2

Hi,
Though $clog2 is not a SV specific function, but I am not sure where 
should I ask my quaries. So I am using SV-BC
alias. If it is not proper body to discuss then please let me know.

verilog LRM 1364-2005 section 17.11.1 says  that " This ( $clog2 ) 
system function can be used to compute the minimum
address width necessary to address a memory of a given size or the 
minimum vector width necessary to represent
a given number of states".
 
Consider the scenario,
      
       module Top;
        localparam b = $clog2(-1); // is the result 32  ?
        localparam c = $clog2(1);  //  is the result 1  ?
        localparam d = $clog2(100); // is the result 7 ?
        localparam e = $clog2(32); //  is the result 5  ? though no. of 
bits to represent 32 is 6
       endmodule
   
Stanandard simulator behaviour is conflictiing and confusing for the 
case. For e.g. some of them
giving 6 for $clog2(32). What is the corret result?

  Thanks regrards
   Sumay   



-- 
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.