diff options
author | Bryan O'Sullivan <bos@pathscale.com> | 2006-02-01 06:05:17 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-01 11:53:13 -0500 |
commit | 0f07496144c270f10d0ad06b70b9c9387d5527fd (patch) | |
tree | 33d00ef050b2b63d1033357113fcc6eae589e40a /arch/x86_64/lib/iomap_copy.S | |
parent | c27a0d75b33c030965cc97d3d7f571107a673fb4 (diff) |
[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>
Diffstat (limited to 'arch/x86_64/lib/iomap_copy.S')
-rw-r--r-- | arch/x86_64/lib/iomap_copy.S | 26 |
1 files changed, 26 insertions, 0 deletions
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 @@ | |||
1 | /* | ||
2 | * Copyright 2006 PathScale, Inc. All Rights Reserved. | ||
3 | * | ||
4 | * This file is free software; you can redistribute it and/or modify | ||
5 | * it under the terms of version 2 of the GNU General Public License | ||
6 | * as published by the Free Software Foundation. | ||
7 | * | ||
8 | * This program is distributed in the hope that it will be useful, | ||
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
11 | * GNU General Public License for more details. | ||
12 | * | ||
13 | * You should have received a copy of the GNU General Public License | ||
14 | * along with this program; if not, write to the Free Software Foundation, | ||
15 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | ||
16 | */ | ||
17 | |||
18 | /* | ||
19 | * override generic version in lib/iomap_copy.c | ||
20 | */ | ||
21 | .globl __iowrite32_copy | ||
22 | .p2align 4 | ||
23 | __iowrite32_copy: | ||
24 | movl %edx,%ecx | ||
25 | rep movsd | ||
26 | ret | ||