From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 69FAE3857BA4; Sun,  3 Dec 2023 12:14:08 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 69FAE3857BA4
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1701605648;
	bh=yz3716ejWJvUNT54HGd/bixqLbFyZd4YdukRVD2r4bE=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=Izvf2M1zcUuPeRFQNHdUSU+atHrpnLjpGBh1U70uOBR93PgdnOZYGQ4jC+kjPvPIK
	 LsldJxvNt1omq8vEES2+C/28LJXhYLUUQmkL9KbazRa/hzGd1t4Qmp7sPXna9pdd+A
	 OvfPwChzJWxcBG/Lt379vevCNh8Kfosqh1KLWyrM=
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/112789] Missing clang __builtin_ctzs for short
Date: Sun, 03 Dec 2023 12:14:07 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub at gcc dot gnu.org
X-Bugzilla-Status: RESOLVED
X-Bugzilla-Resolution: WONTFIX
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-112789-4-qke4UvVlkc@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-112789-4@http.gcc.gnu.org/bugzilla/>
References: <bug-112789-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112789

--- Comment #14 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
One thing against adding these builtins (especially when we have a type-gen=
eric
builtin which can handle all types, not just some of them) is that clang has
added them completely unorthogonally.
GCC has __builtin_{ctz,clz,clrsb,ffs,popcount,parity}{,l,ll,imax,g} (the la=
st
one in GCC 14 only), while clang has
__builtin_{ctz,clz,clrsb,ffs,popcount,parity}{,l,ll} and then just
__builtin_c{l,t}zs for unsigned short extra, but none of the other 4 similar
builtins, nor any builtin for unsigned char, etc.  Why is unsigned short th=
at
much more important than unsigned char or unsigned __int128 or all the unsi=
gned
_BitInt types?=