On Fri, Jan 19, 2018 at 9:51 AM, John Baldwin <j...@freebsd.org> wrote: > On Friday, January 19, 2018 04:34:06 AM Conrad Meyer wrote: >> The logical result of a right shift >= the width of a type is zero, but our >> compiler decides this is a warning (and thus, error). Just remove ccp(4) >> from i386. > > You would think that. The shift instructions on x86 effectively ignore the > upper bits of the count, so a 33-bit shift on i386 ends up being a 1-bit > shift, > etc. IIRC.
This never becomes a shift instruction on x86 or any other arch — it's a constant before it reaches machine code. _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
