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

Yufeng Zhang Yufeng.Zhang@arm.com
Tue Jan 7 16:35:00 GMT 2014


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.
-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: patch
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20140107/fc63dc26/attachment.ksh>


More information about the Gcc-patches mailing list