From owner-dev-commits-src-branches@freebsd.org Tue May 11 10:31:08 2021 Return-Path: Delivered-To: dev-commits-src-branches@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 62F096318DE; Tue, 11 May 2021 10:31:08 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FfZ2h0M5dz3k5M; Tue, 11 May 2021 10:31:08 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id E9AC6167B1; Tue, 11 May 2021 10:31:07 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 14BAV7uJ085410; Tue, 11 May 2021 10:31:07 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 14BAV7I0085403; Tue, 11 May 2021 10:31:07 GMT (envelope-from git) Date: Tue, 11 May 2021 10:31:07 GMT Message-Id: <202105111031.14BAV7I0085403@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Alex Richardson Subject: git: 0e1e71400a0f - stable/13 - libc/string/bcopy.c: Use intptr_t as the copy type MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: arichardson X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 0e1e71400a0fa3ac6fe5a90c4d830b06eef3e71e Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-branches@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commits to the stable branches of the FreeBSD src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 11 May 2021 10:31:08 -0000 The branch stable/13 has been updated by arichardson: URL: https://cgit.FreeBSD.org/src/commit/?id=0e1e71400a0fa3ac6fe5a90c4d830b06eef3e71e commit 0e1e71400a0fa3ac6fe5a90c4d830b06eef3e71e Author: Alex Richardson AuthorDate: 2021-04-19 23:15:57 +0000 Commit: Alex Richardson CommitDate: 2021-05-11 08:39:26 +0000 libc/string/bcopy.c: Use intptr_t as the copy type While most 64-bit architectures have an assembly implementation of this file RISC-V does not. As we now copy 8 bytes instead of 4 it should speed up RISC-V. Using intptr_t instead of int also allows using this file for CHERI pure-capability code since trying to copy pointers using integer loads/stores will invalidate pointers. Reviewed By: kib Obtained from: CheriBSD (partially) MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D29535 (cherry picked from commit 0b4ad01d91a3b24cea00d54d25beed0f487c0183) --- lib/libc/string/bcopy.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/lib/libc/string/bcopy.c b/lib/libc/string/bcopy.c index 141416d0afec..84715d0432e3 100644 --- a/lib/libc/string/bcopy.c +++ b/lib/libc/string/bcopy.c @@ -40,11 +40,7 @@ __FBSDID("$FreeBSD$"); #include -/* - * sizeof(word) MUST BE A POWER OF TWO - * SO THAT wmask BELOW IS ALL ONES - */ -typedef int word; /* "word" used for optimal copy speed */ +typedef intptr_t word; /* "word" used for optimal copy speed */ #define wsize sizeof(word) #define wmask (wsize - 1) @@ -105,7 +101,8 @@ bcopy(const void *src0, void *dst0, size_t length) * Copy whole words, then mop up any trailing bytes. */ t = length / wsize; - TLOOP(*(word *)dst = *(word *)src; src += wsize; dst += wsize); + TLOOP(*(word *)(void *)dst = *(const word *)(const void *)src; + src += wsize; dst += wsize); t = length & wmask; TLOOP(*dst++ = *src++); } else { @@ -126,7 +123,8 @@ bcopy(const void *src0, void *dst0, size_t length) TLOOP1(*--dst = *--src); } t = length / wsize; - TLOOP(src -= wsize; dst -= wsize; *(word *)dst = *(word *)src); + TLOOP(src -= wsize; dst -= wsize; + *(word *)(void *)dst = *(const word *)(const void *)src); t = length & wmask; TLOOP(*--dst = *--src); }