Re: using gcc built-ins for bitops?

[Paul Jackson <pj@sgi.com>]

I see a list of these gcc bitop builtins at the bottom of the page:

  http://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html

Looks like you can find the position of the first 1 bit, the length of
the leading or trailing seq of 0 bits, the hamming weight (popcount) and
the parity, each for int, long and long long.

I just add this for the benefit of others.

As to your primary question - is this worth doing - I don't have
an answer.

-- 
                          I won't rest till it's the best ...
                          Programmer, Linux Scalability
                          Paul Jackson <pj@sgi.com> 1.650.933.1373