From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E6A0C433DB for ; Fri, 26 Mar 2021 13:33:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E8E7F61A24 for ; Fri, 26 Mar 2021 13:33:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230138AbhCZNcv (ORCPT ); Fri, 26 Mar 2021 09:32:51 -0400 Received: from eu-smtp-delivery-151.mimecast.com ([185.58.86.151]:40705 "EHLO eu-smtp-delivery-151.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229969AbhCZNcg (ORCPT ); Fri, 26 Mar 2021 09:32:36 -0400 Received: from AcuMS.aculab.com (156.67.243.121 [156.67.243.121]) (Using TLS) by relay.mimecast.com with ESMTP id uk-mta-9-1wt_UL1sPA2C6UYdNIVbOQ-1; Fri, 26 Mar 2021 13:32:32 +0000 X-MC-Unique: 1wt_UL1sPA2C6UYdNIVbOQ-1 Received: from AcuMS.Aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) by AcuMS.aculab.com (fd9f:af1c:a25b:0:994c:f5c2:35d6:9b65) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 26 Mar 2021 13:32:31 +0000 Received: from AcuMS.Aculab.com ([fe80::994c:f5c2:35d6:9b65]) by AcuMS.aculab.com ([fe80::994c:f5c2:35d6:9b65%12]) with mapi id 15.00.1497.012; Fri, 26 Mar 2021 13:32:31 +0000 From: David Laight To: 'Andy Lutomirski' , libc-alpha , "H. J. Lu" , X86 ML , LKML , "Bae, Chang Seok" , Florian Weimer , "Carlos O'Donell" , Rich Felker Subject: RE: Why does glibc use AVX-512? Thread-Topic: Why does glibc use AVX-512? Thread-Index: AQHXIfoDPTL8bfD4xUusWDRPF/V336qWQECQ Date: Fri, 26 Mar 2021 13:32:31 +0000 Message-ID: <5cb200606c5c40d4a289dbc6ad08f437@AcuMS.aculab.com> References: In-Reply-To: Accept-Language: en-GB, en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.202.205.107] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=C51A453 smtp.mailfrom=david.laight@aculab.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: aculab.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: base64 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org RnJvbTogQW5keSBMdXRvbWlyc2tpDQo+IFNlbnQ6IDI2IE1hcmNoIDIwMjEgMDQ6MzgNCj4gDQo+ IEhpIGFsbC0NCj4gDQo+IGdsaWJjIGFwcGVhcnMgdG8gdXNlIEFWWDUxMkYgZm9yIG1lbWNweSBi eSBkZWZhdWx0LiAgKFVubGVzcw0KPiBQcmVmZXJfRVJNUyBpcyBkZWZhdWx0LW9uLCBidXQgSSBn ZW51aW5lbHkgY2FuJ3QgdGVsbCBpZiB0aGlzIGlzIHRoZQ0KPiBjYXNlLiAgSSBkaWQgc29tZSBz ZWFyY2hpbmcuKSAgVGhlIGNvbW1pdCBhZGRpbmcgaXQgcmVmZXJzIHRvIGEgMjAxNg0KPiBlbWFp bCBzYXlpbmcgdGhhdCBpdCdzIDMwJSBvbiBLTkwuICBVbmZvcnR1bmF0ZWx5LCBBVlgtNTEyIGlz IG5vdw0KPiBhdmFpbGFibGUgaW4gbm9ybWFsIGhhcmR3YXJlLCBhbmQgdGhlIG92ZXJoZWFkIGZy b20gc3dpdGNoaW5nIGJldHdlZW4NCj4gbm9ybWFsIGFuZCBBVlgtNTEyIGNvZGUgYXBwZWFycyB0 byB2YXJ5IGZyb20gYmFkIHRvIGdlbnVpbmVseQ0KPiBob3JyaWJsZS4gIEFuZCwgb25jZSBhbnl0 aGluZyBoYXMgdXNlZCB0aGUgaGlnaCBwYXJ0cyBvZiBZTU0gYW5kL29yDQo+IFpNTSwgdGhvc2Ug c3RhdGVzIHRlbmQgdG8gZ2V0IHN0dWNrIHdpdGggWElOVVNFPTEuDQoNClllcyBJIHdvbmRlciBo b3cgbXVjaCBmYXN0ZXIgJ25vcm1hbCcgY29waWVzIGV2ZXIgZ2V0IGJlY2F1c2UNCm9mIHRoZXNl IG9wdGltaXNhdGlvbnMuDQpOb3QgbWFueSBwcm9ncmFtcyBzaXQgaW4gYSBsb29wIHJlcGVhdGVk bHkgY29weWluZyB0aGUgc2FtZSA4ayBidWZmZXIuDQoNCk5vdCB0byBtZW50aW9uIHRoZSBjcHUg d2hlcmUgdGhlICd3aWRlJyBpbnN0cnVjdGlvbnMgZWl0aGVyDQp1c2UgdGhlICduYXJyb3cnIGV4 ZWN1dGlvbiB1bml0IHR3aWNlIG9yIGF0IGhhbGYgZnJlcXVlbmN5Lg0KU28gd2hpbGUgc3VwcG9y dGVkLCB1c2luZyB0aGVtIGlzbid0IHJlYWxseSB1c2VmdWwuDQoNCklJUkMgdGhlIFtYWVpdTU0g cmVnaXN0ZXJzIGFyZSBhbGwgY2FsbGVyIHNhdmVkPw0KU28gc3lzdGVtIGNhbGxzIChvciByYXRo ZXIgdGhlIEMgd3JhcHBlcikgaXMgYWxsb3dlZCB0bw0KdHJhc2ggdGhlbSBhbGwuDQpTbyB0aGUg c3lzdGVtIGNhbGwgZW50cnkgY291bGQgemVybyBhbGwgdGhlIFtYWVpdTU0gcmVnaXN0ZXJzLg0K SSB0aGluayB0aGV5IFhTQVZFeHh4IGFuZCBsYXRlciBYUkVTVE9SRXh4eCBhcmUgdGhlbiBxdWlj ay4NCkluIHBhcnRpY3VsYXIgdGhleSBkb24ndCBuZWVkIHNhdmluZyBvbiBhIGNvbnRleHQgc3dp dGNoIGZyb20NCmEgc3lzdGVtIGNhbGwuDQpUaGlzIG1pZ2h0IGdldCB0aGVtIG1hcmtlZCAnbm90 IGluIHVzZScgbW9yZSBvZnRlbi4NCkJ1dCBwcm9iYWJseSBub3QgaWYgbWVtY3B5KCkgc3RhcnRz IHVzaW5nIHRoZW0uDQooVGhpcyBkb2Vzbid0IGhlbHAgc2lnbmFsIGhhbmRsZXJzLikNCg0KSVNU UiBvbmUgY3B1IGZhbWlseSB3aGVyZSBaVkVST1VQUEVSIGdvZXMgZnJvbSAnY2hlYXAnIHRvDQon ZXhwZW5zaXZlJy4NCg0KCURhdmlkDQoNCi0NClJlZ2lzdGVyZWQgQWRkcmVzcyBMYWtlc2lkZSwg QnJhbWxleSBSb2FkLCBNb3VudCBGYXJtLCBNaWx0b24gS2V5bmVzLCBNSzEgMVBULCBVSw0KUmVn aXN0cmF0aW9uIE5vOiAxMzk3Mzg2IChXYWxlcykNCg==