From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-00641c01.pphosted.com (mx0a-00641c01.pphosted.com [205.220.165.146]) by sourceware.org (Postfix) with ESMTPS id D27EB3857029; Thu, 14 Sep 2023 06:51:11 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org D27EB3857029 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=gcc.gnu.org Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=gcc.gnu.org Received: from pps.filterd (m0247472.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 38E6kMGE009453; Thu, 14 Sep 2023 06:51:11 GMT Received: from mxout25.s.uw.edu (mxout25.s.uw.edu [140.142.234.175]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3t3h2jwagb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Sep 2023 06:51:10 +0000 Received: from smtp.washington.edu (smtp.washington.edu [140.142.234.157]) by mxout25.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 38E6osNR020556 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 13 Sep 2023 23:50:54 -0700 X-Auth-Received: from localhost.localdomain ([10.154.75.179]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 38E6nuq1027316 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Wed, 13 Sep 2023 23:50:54 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu From: Ken Matsui To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui Subject: [PATCH v11 38/40] libstdc++: Optimize is_signed trait performance Date: Wed, 13 Sep 2023 23:43:17 -0700 Message-ID: <20230914064949.29787-39-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230914064949.29787-1-kmatsui@gcc.gnu.org> References: <20230914064949.29787-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: h3d16UzpBcfvTmUIbIIOaeIxnA2m7_Mj X-Proofpoint-ORIG-GUID: h3d16UzpBcfvTmUIbIIOaeIxnA2m7_Mj X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-14_04,2023-09-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 clxscore=1034 mlxscore=0 bulkscore=0 malwarescore=0 phishscore=0 mlxlogscore=736 spamscore=0 impostorscore=0 adultscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309140060 X-Spam-Status: No, score=-13.1 required=5.0 tests=BAYES_00,GIT_PATCH_0,JMQ_SPF_NEUTRAL,KAM_DMARC_STATUS,RCVD_IN_DNSWL_LOW,SPF_HELO_NONE,SPF_NEUTRAL,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: This patch optimizes the performance of the is_signed trait by dispatching to the new __is_signed built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_signed): Use __is_signed built-in trait. (is_signed_v): Likewise. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index f7d3815f332..7e93923f44b 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -982,6 +982,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION : public __bool_constant<__is_abstract(_Tp)> { }; + /// is_signed +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_signed) + template + struct is_signed + : public __bool_constant<__is_signed(_Tp)> + { }; +#else /// @cond undocumented template::value> @@ -994,11 +1001,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; /// @endcond - /// is_signed template struct is_signed : public __is_signed_helper<_Tp>::type { }; +#endif /// is_unsigned #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unsigned) @@ -3445,8 +3452,13 @@ template template inline constexpr bool is_final_v = __is_final(_Tp); +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_signed) +template + inline constexpr bool is_signed_v = __is_signed(_Tp); +#else template inline constexpr bool is_signed_v = is_signed<_Tp>::value; +#endif #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unsigned) template -- 2.42.0