svn commit: r328159 - head/sys/modules

[Conrad Meyer]

On Fri, Jan 19, 2018 at 9:51 AM, John Baldwin <jhb at 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.