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| author | Jesper Nilsson <jesper.nilsson@axis.com> | 2009-06-10 15:06:55 +0200 |
|---|---|---|
| committer | Jesper Nilsson <jesper.nilsson@axis.com> | 2009-06-10 15:21:03 +0200 |
| commit | 7f2ff23db1de53ea8695bb4a7c1cfab88886e3fd (patch) | |
| tree | 3e3b4d823322052d83fc2e80b755cafdc50219dd /arch/cris/arch-v32/lib | |
| parent | b0903ee8e4853eea35cb24cfb4dda1b60c7948dc (diff) | |
| download | op-kernel-dev-7f2ff23db1de53ea8695bb4a7c1cfab88886e3fd.zip op-kernel-dev-7f2ff23db1de53ea8695bb4a7c1cfab88886e3fd.tar.gz | |
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/arch-v32/lib')
| -rw-r--r-- | arch/cris/arch-v32/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/cris/arch-v32/lib/strcmp.S | 21 |
2 files changed, 22 insertions, 1 deletions
diff --git a/arch/cris/arch-v32/lib/Makefile b/arch/cris/arch-v32/lib/Makefile index eb4aad1..dd296b9 100644 --- a/arch/cris/arch-v32/lib/Makefile +++ b/arch/cris/arch-v32/lib/Makefile @@ -3,5 +3,5 @@ # lib-y = checksum.o checksumcopy.o string.o usercopy.o memset.o \ - csumcpfruser.o spinlock.o delay.o + csumcpfruser.o spinlock.o delay.o strcmp.o diff --git a/arch/cris/arch-v32/lib/strcmp.S b/arch/cris/arch-v32/lib/strcmp.S new file mode 100644 index 0000000..8f7a1ee --- /dev/null +++ b/arch/cris/arch-v32/lib/strcmp.S @@ -0,0 +1,21 @@ +; strcmp.S -- CRISv32 version. +; Copyright (C) 2008 AXIS Communications AB +; Written by Edgar E. Iglesias +; +; This source code is licensed under the GNU General Public License, +; Version 2. See the file COPYING for more details. + + .global strcmp + .type strcmp,@function +strcmp: +1: + move.b [$r10+], $r12 + seq $r13 + sub.b [$r11+], $r12 + or.b $r12, $r13 + beq 1b + nop + + ret + movs.b $r12, $r10 + .size strcmp, . - strcmp |
