diff options
| author | Bryan O'Sullivan <bos@pathscale.com> | 2006-02-01 12:05:17 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-01 17:53:13 +0100 |
| commit | 0f07496144c270f10d0ad06b70b9c9387d5527fd (patch) | |
| tree | 33d00ef050b2b63d1033357113fcc6eae589e40a | |
| parent | [PATCH] Introduce __iowrite32_copy (diff) | |
| download | linux-0f07496144c270f10d0ad06b70b9c9387d5527fd.tar.xz linux-0f07496144c270f10d0ad06b70b9c9387d5527fd.zip | |
[PATCH] Add faster __iowrite32_copy routine for x86_64
This assembly version is measurably faster than the generic version in
lib/iomap_copy.c.
Signed-off-by: Bryan O'Sullivan <bos@pathscale.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/x86_64/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/x86_64/lib/iomap_copy.S | 26 |
2 files changed, 27 insertions, 1 deletions
diff --git a/arch/x86_64/lib/Makefile b/arch/x86_64/lib/Makefile index bba5db6cebd6..ccef6ae747a3 100644 --- a/arch/x86_64/lib/Makefile +++ b/arch/x86_64/lib/Makefile @@ -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 --git a/arch/x86_64/lib/iomap_copy.S b/arch/x86_64/lib/iomap_copy.S new file mode 100644 index 000000000000..8bbade5fea05 --- /dev/null +++ b/arch/x86_64/lib/iomap_copy.S @@ -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 |