[PING] [PATCH, AArch64] Use GCC builtins to count leading/tailing zeros

[Yufeng Zhang]

Ping~

OK for stage-1?

The original patch was posted here:
   http://gcc.gnu.org/ml/gcc-patches/2014-01/msg00286.html
and the glibc patch was approved here:
   http://sourceware.org/ml/libc-alpha/2014-01/msg00120.html

Thanks,
Yufeng

On 01/07/14 16:34, Yufeng Zhang wrote:
> Hi,
>
> This patch is to sync up include/longlong.h with its glibc peer after
> the proposed change here:
>
> http://sourceware.org/ml/libc-alpha/2014-01/msg00114.html
>
> The patch defines a number of macros in stdlib/longlong.h to use GCC
> builtins __builtin_clz* to implement the __clz* and __ctz* functions on
> AArch64.
>
> OK for the mainline?
>
> Thanks,
> Yufeng
>
> include/
>
> 	* longlong.h (count_leading_zeros, count_trailing_zeros)
> 	(COUNT_LEADING_ZEROS_0): Define for aarch64.