From owner-svn-src-all@freebsd.org Sat Dec 8 04:53:10 2018 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id F0F681330EB8; Sat, 8 Dec 2018 04:53:09 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 947556D4D6; Sat, 8 Dec 2018 04:53:09 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 700C61D8F2; Sat, 8 Dec 2018 04:53:09 +0000 (UTC) (envelope-from mjg@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wB84r9jZ060254; Sat, 8 Dec 2018 04:53:09 GMT (envelope-from mjg@FreeBSD.org) Received: (from mjg@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wB84r9tO060253; Sat, 8 Dec 2018 04:53:09 GMT (envelope-from mjg@FreeBSD.org) Message-Id: <201812080453.wB84r9tO060253@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: mjg set sender to mjg@FreeBSD.org using -f From: Mateusz Guzik Date: Sat, 8 Dec 2018 04:53:09 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r341719 - head/sys/amd64/amd64 X-SVN-Group: head X-SVN-Commit-Author: mjg X-SVN-Commit-Paths: head/sys/amd64/amd64 X-SVN-Commit-Revision: 341719 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 947556D4D6 X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.997,0]; NEURAL_HAM_SHORT(-0.96)[-0.960,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-0.99)[-0.990,0] X-Rspamd-Server: mx1.freebsd.org X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 08 Dec 2018 04:53:10 -0000 Author: mjg Date: Sat Dec 8 04:53:08 2018 New Revision: 341719 URL: https://svnweb.freebsd.org/changeset/base/341719 Log: amd64: stop re-reading curpc on subyte/suword Originally read value is still safely kept. Re-reading code was there for previous iterations which were partially shared with i386. Sponsored by: The FreeBSD Foundation Modified: head/sys/amd64/amd64/support.S Modified: head/sys/amd64/amd64/support.S ============================================================================== --- head/sys/amd64/amd64/support.S Sat Dec 8 00:48:10 2018 (r341718) +++ head/sys/amd64/amd64/support.S Sat Dec 8 04:53:08 2018 (r341719) @@ -1155,7 +1155,6 @@ ENTRY(suword16_nosmap) movw %si,(%rdi) xorl %eax,%eax - movq PCPU(CURPCB),%rcx /* restore trashed register */ movq %rax,PCB_ONFAULT(%rcx) POP_FRAME_POINTER ret @@ -1174,7 +1173,6 @@ ENTRY(suword16_smap) movw %si,(%rdi) clac xorl %eax,%eax - movq PCPU(CURPCB),%rcx /* restore trashed register */ movq %rax,PCB_ONFAULT(%rcx) POP_FRAME_POINTER ret @@ -1192,7 +1190,6 @@ ENTRY(subyte_nosmap) movl %esi,%eax movb %al,(%rdi) xorl %eax,%eax - movq PCPU(CURPCB),%rcx /* restore trashed register */ movq %rax,PCB_ONFAULT(%rcx) POP_FRAME_POINTER ret @@ -1212,7 +1209,6 @@ ENTRY(subyte_smap) movb %al,(%rdi) clac xorl %eax,%eax - movq PCPU(CURPCB),%rcx /* restore trashed register */ movq %rax,PCB_ONFAULT(%rcx) POP_FRAME_POINTER ret