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2676b89eb8
linux/arch/powerpc
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Christophe Leroy 2676b89eb8 powerpc/lib: optimise PPC32 memcmp 
At the time being, memcmp() compares two chunks of memory
byte per byte.

This patch optimises the comparison by comparing word by word.

On the same way as commit 15c2d45d17 ("powerpc: Add 64bit
optimised memcmp"), this patch moves memcmp() into a dedicated
file named memcmp_32.S

A small benchmark performed on an 8xx comparing two chuncks
of 512 bytes performed 100000 times gives:

Before : 5852274 TB ticks
After:   1488638 TB ticks

This is almost 4 times faster

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-06-04 00:39:21 +10:00
..
boot powerpc/boot: remove unused variable in mpc8xx 2018-06-04 00:39:17 +10:00
configs powerpc/config: powernv_defconfig updates 2018-05-10 23:25:07 +10:00
crypto crypto: hash - annotate algorithms taking optional key 2018-01-12 23:03:35 +11:00
include powerpc/time: inline arch_vtime_task_switch() 2018-06-04 00:39:20 +10:00
kernel powerpc/time: inline arch_vtime_task_switch() 2018-06-04 00:39:20 +10:00
kvm Merge branch 'topic/ppc-kvm' into next 2018-05-15 22:28:19 +10:00
lib powerpc/lib: optimise PPC32 memcmp 2018-06-04 00:39:21 +10:00
math-emu License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mm powerpc/mm: Remove stale_map[] handling on non SMP processors 2018-06-04 00:39:16 +10:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-03-05 11:29:24 -08:00
oprofile powerpc: Use sizeof(*foo) rather than sizeof(struct foo) 2018-03-20 16:47:53 +11:00
perf powerpc/perf: Unregister thread-imc if core-imc not supported 2018-06-03 20:43:37 +10:00
platforms powerpc/8xx: Remove RTC clock on 88x 2018-06-04 00:39:18 +10:00
purgatory License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sysdev powerpc/xics: Add missing of_node_put() in error path 2018-06-03 20:43:35 +10:00
tools powerpc/kbuild: Use flags variables rather than overriding LD/CC/AS 2018-06-01 23:08:09 +10:00
xmon powerpc/64: Save stack pointer when we hard disable interrupts 2018-06-03 20:43:42 +10:00
Kconfig powerpc: always enable RTC_LIB 2018-06-03 20:43:33 +10:00
Kconfig.debug powerpc: Add new kconfig CONFIG_PPC_IRQ_SOFT_MASK_DEBUG 2018-01-19 22:37:03 +11:00
Makefile powerpc/Makefile: set -mcpu=860 flag for the 8xx 2018-06-04 00:39:20 +10:00
Makefile.postlink License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00