diff options
author | Jesper Nilsson <jesper.nilsson@axis.com> | 2009-06-10 09:06:55 -0400 |
---|---|---|
committer | Jesper Nilsson <jesper.nilsson@axis.com> | 2009-06-10 09:21:03 -0400 |
commit | 7f2ff23db1de53ea8695bb4a7c1cfab88886e3fd (patch) | |
tree | 3e3b4d823322052d83fc2e80b755cafdc50219dd /arch/cris | |
parent | b0903ee8e4853eea35cb24cfb4dda1b60c7948dc (diff) |
CRISv32: Add arch optimized strcmp.
Add an optimized strcmp for CRISv32. This improves strcmp performance
with about 25% when comparing a 55 character string with itself.
Signed-off-by: Edgar Iglesias <edgar@axis.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Diffstat (limited to 'arch/cris')
-rw-r--r-- | arch/cris/arch-v32/lib/Makefile | 2 | ||||
-rw-r--r-- | arch/cris/arch-v32/lib/strcmp.S | 21 | ||||
-rw-r--r-- | arch/cris/include/asm/string.h | 6 |
3 files changed, 28 insertions, 1 deletions
diff --git a/arch/cris/arch-v32/lib/Makefile b/arch/cris/arch-v32/lib/Makefile index eb4aad1f1158..dd296b9db034 100644 --- a/arch/cris/arch-v32/lib/Makefile +++ b/arch/cris/arch-v32/lib/Makefile | |||
@@ -3,5 +3,5 @@ | |||
3 | # | 3 | # |
4 | 4 | ||
5 | lib-y = checksum.o checksumcopy.o string.o usercopy.o memset.o \ | 5 | lib-y = checksum.o checksumcopy.o string.o usercopy.o memset.o \ |
6 | csumcpfruser.o spinlock.o delay.o | 6 | csumcpfruser.o spinlock.o delay.o strcmp.o |
7 | 7 | ||
diff --git a/arch/cris/arch-v32/lib/strcmp.S b/arch/cris/arch-v32/lib/strcmp.S new file mode 100644 index 000000000000..8f7a1ee62591 --- /dev/null +++ b/arch/cris/arch-v32/lib/strcmp.S | |||
@@ -0,0 +1,21 @@ | |||
1 | ; strcmp.S -- CRISv32 version. | ||
2 | ; Copyright (C) 2008 AXIS Communications AB | ||
3 | ; Written by Edgar E. Iglesias | ||
4 | ; | ||
5 | ; This source code is licensed under the GNU General Public License, | ||
6 | ; Version 2. See the file COPYING for more details. | ||
7 | |||
8 | .global strcmp | ||
9 | .type strcmp,@function | ||
10 | strcmp: | ||
11 | 1: | ||
12 | move.b [$r10+], $r12 | ||
13 | seq $r13 | ||
14 | sub.b [$r11+], $r12 | ||
15 | or.b $r12, $r13 | ||
16 | beq 1b | ||
17 | nop | ||
18 | |||
19 | ret | ||
20 | movs.b $r12, $r10 | ||
21 | .size strcmp, . - strcmp | ||
diff --git a/arch/cris/include/asm/string.h b/arch/cris/include/asm/string.h index 691190e99a27..d5db39f9eea1 100644 --- a/arch/cris/include/asm/string.h +++ b/arch/cris/include/asm/string.h | |||
@@ -11,4 +11,10 @@ extern void *memcpy(void *, const void *, size_t); | |||
11 | #define __HAVE_ARCH_MEMSET | 11 | #define __HAVE_ARCH_MEMSET |
12 | extern void *memset(void *, int, size_t); | 12 | extern void *memset(void *, int, size_t); |
13 | 13 | ||
14 | #ifdef CONFIG_ETRAX_ARCH_V32 | ||
15 | /* For v32 we provide strcmp. */ | ||
16 | #define __HAVE_ARCH_STRCMP | ||
17 | extern int strcmp(const char *s1, const char *s2); | ||
18 | #endif | ||
19 | |||
14 | #endif | 20 | #endif |