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Fri, 13 Oct 2023 21:36:02 +0000 Received: from smtp.washington.edu (smtp.washington.edu [140.142.234.157]) by mxout23.cac.washington.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39DLZqU9018134 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 13 Oct 2023 14:35:52 -0700 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.19.18.191]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 39DLC9cd009146 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Oct 2023 14:35:52 -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 v18 36/40] libstdc++: Optimize is_unsigned trait performance Date: Fri, 13 Oct 2023 14:04:32 -0700 Message-ID: <20231013211206.1215663-37-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231013211206.1215663-1-kmatsui@gcc.gnu.org> References: <20231011215049.1052142-1-kmatsui@gcc.gnu.org> <20231013211206.1215663-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: 0nshQCDl2Bb5MpMPWI66FoPIrP87mrQz X-Proofpoint-GUID: 0nshQCDl2Bb5MpMPWI66FoPIrP87mrQz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-13_12,2023-10-12_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1034 suspectscore=0 lowpriorityscore=0 adultscore=0 mlxscore=0 malwarescore=0 mlxlogscore=629 bulkscore=0 phishscore=0 impostorscore=0 priorityscore=1501 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310130187 X-Spam-Status: No, score=-13.2 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 X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1776995061376064333 X-GMAIL-MSGID: 1779677796607023972 This patch optimizes the performance of the is_unsigned trait by dispatching to the new __is_unsigned built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_unsigned): Use __is_unsigned built-in trait. (is_unsigned_v): Likewise. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 48d630a1478..f7d3815f332 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -1001,10 +1001,17 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; /// is_unsigned +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unsigned) + template + struct is_unsigned + : public __bool_constant<__is_unsigned(_Tp)> + { }; +#else template struct is_unsigned : public __and_, __not_>>::type { }; +#endif /// @cond undocumented template @@ -3440,8 +3447,14 @@ template template inline constexpr bool is_signed_v = is_signed<_Tp>::value; + +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unsigned) +template + inline constexpr bool is_unsigned_v = __is_unsigned(_Tp); +#else template inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; +#endif template inline constexpr bool is_constructible_v = __is_constructible(_Tp, _Args...);