From: "Bryan O'Sullivan" <bos@pathscale.com>
To: akpm@osdl.org, ak@suse.de
Cc: linux-kernel@vger.kernel.org, hch@infradead.org, rdreier@cisco.com
Subject: [PATCH 2 of 2] Add faster __iowrite32_copy routine for x86_64
Date: Thu, 12 Jan 2006 09:05:32 -0800 [thread overview]
Message-ID: <30c7112c6e81a83a87f0.1137085532@eng-12.pathscale.com> (raw)
In-Reply-To: <patchbomb.1137085530@eng-12.pathscale.com>
This assembly version is measurably faster than the generic version
in lib/iomap_copy.c.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
diff -r ec2b3675168a -r 30c7112c6e81 arch/x86_64/lib/Makefile
--- a/arch/x86_64/lib/Makefile Thu Jan 12 09:03:37 2006 -0800
+++ b/arch/x86_64/lib/Makefile Thu Jan 12 09:03:37 2006 -0800
@@ -4,7 +4,7 @@
CFLAGS_csum-partial.o := -funroll-loops
-obj-y := io.o
+obj-y := io.o iomap_copy.o
lib-y := csum-partial.o csum-copy.o csum-wrappers.o delay.o \
usercopy.o getuser.o putuser.o \
diff -r ec2b3675168a -r 30c7112c6e81 arch/x86_64/lib/iomap_copy.S
--- /dev/null Thu Jan 1 00:00:00 1970 +0000
+++ b/arch/x86_64/lib/iomap_copy.S Thu Jan 12 09:03:37 2006 -0800
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2006 PathScale, Inc. All Rights Reserved.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/*
+ * override generic version in lib/iomap_copy.c
+ */
+ .globl __iowrite32_copy
+ .p2align 4
+__iowrite32_copy:
+ movl %edx,%ecx
+ rep movsd
+ ret
prev parent reply other threads:[~2006-01-12 17:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-12 17:05 [PATCH 0 of 2] MMIO copy patches, the next generation Bryan O'Sullivan
2006-01-12 17:05 ` [PATCH 1 of 2] Introduce __iowrite32_copy Bryan O'Sullivan
2006-01-12 17:05 ` Bryan O'Sullivan [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=30c7112c6e81a83a87f0.1137085532@eng-12.pathscale.com \
--to=bos@pathscale.com \
--cc=ak@suse.de \
--cc=akpm@osdl.org \
--cc=hch@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rdreier@cisco.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome