From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1039) id C6D71385AC21; Mon, 30 Aug 2021 17:40:31 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C6D71385AC21 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit From: H.J. Lu To: glibc-cvs@sourceware.org Subject: [glibc] x86-64: Use testl to check __x86_string_control X-Act-Checkin: glibc X-Git-Author: H.J. Lu X-Git-Refname: refs/heads/master X-Git-Oldrev: d4877540e565f89f0a33e5b92c9f4b995e2f3a33 X-Git-Newrev: 3c8b9879cab6d41787bc5b14c1748f62fd6d0e5f Message-Id: <20210830174031.C6D71385AC21@sourceware.org> Date: Mon, 30 Aug 2021 17:40:31 +0000 (GMT) X-BeenThere: glibc-cvs@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Glibc-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 30 Aug 2021 17:40:31 -0000 https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=3c8b9879cab6d41787bc5b14c1748f62fd6d0e5f commit 3c8b9879cab6d41787bc5b14c1748f62fd6d0e5f Author: H.J. Lu Date: Sat Aug 28 06:10:38 2021 -0700 x86-64: Use testl to check __x86_string_control Use testl, instead of andl, to check __x86_string_control to avoid updating __x86_string_control. Reviewed-by: Carlos O'Donell Diff: --- sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S index 9f02624375..abde8438d4 100644 --- a/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S +++ b/sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S @@ -325,7 +325,7 @@ L(movsb): /* Avoid slow backward REP MOVSB. */ jb L(more_8x_vec_backward) # if AVOID_SHORT_DISTANCE_REP_MOVSB - andl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip) + testl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip) jz 3f movq %rdi, %rcx subq %rsi, %rcx @@ -333,7 +333,7 @@ L(movsb): # endif 1: # if AVOID_SHORT_DISTANCE_REP_MOVSB - andl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip) + testl $X86_STRING_CONTROL_AVOID_SHORT_DISTANCE_REP_MOVSB, __x86_string_control(%rip) jz 3f movq %rsi, %rcx subq %rdi, %rcx