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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
..
alloc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
checksum_32.S powerpc: Implement csum_ipv6_magic in assembly 2018-06-04 00:39:19 +10:00
checksum_64.S powerpc: Implement csum_ipv6_magic in assembly 2018-06-04 00:39:19 +10:00
checksum_wrappers.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
code-patching.c powerpc/lib/feature-fixups: use raw_patch_instruction() 2018-01-21 15:06:25 +11:00
copy_32.S powerpc/32: remove a NOP from memset() 2017-09-01 16:42:46 +10:00
copypage_64.S powerpc/64s: Set assembler machine type to POWER4 2018-04-01 00:47:49 +11:00
copypage_power7.S powerpc/64s: Set assembler machine type to POWER4 2018-04-01 00:47:49 +11:00
copyuser_64.S powerpc/64s: Set assembler machine type to POWER4 2018-04-01 00:47:49 +11:00
copyuser_power7.S powerpc/64s: Set assembler machine type to POWER4 2018-04-01 00:47:49 +11:00
crtsavres.S powerpc/64: Do not create new section for save/restore functions 2017-05-30 14:59:51 +10:00
div64.S
feature-fixups-test.S powerpc/lib: Add alt patching test of branching past the last instruction 2018-05-11 23:29:03 +10:00
feature-fixups.c powerpc/64s: Patch barrier_nospec in modules 2018-06-03 20:43:44 +10:00
hweight_64.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
ldstfp.S powerpc: Fix kernel crash in emulation of vector loads and stores 2017-09-04 19:38:07 +10:00
locks.c powerpc/spinlock: Fix spin_unlock_wait() 2016-06-14 16:05:44 +10:00
Makefile powerpc/lib: optimise PPC32 memcmp 2018-06-04 00:39:21 +10:00
mem_64.S powerpc/string: Implement optimized memset variants 2017-08-17 23:04:35 +10:00
memcmp_32.S powerpc/lib: optimise PPC32 memcmp 2018-06-04 00:39:21 +10:00
memcmp_64.S ppc: move exports to definitions 2016-08-07 23:50:09 -04:00
memcpy_64.S powerpc/64s: Set assembler machine type to POWER4 2018-04-01 00:47:49 +11:00
memcpy_power7.S powerpc/64s: Set assembler machine type to POWER4 2018-04-01 00:47:49 +11:00
pmem.c powerpc/lib: Implement UACCESS_FLUSHCACHE API 2017-11-13 08:00:31 +11:00
quad.S powerpc: Handle most loads and stores in instruction emulation code 2017-09-01 16:39:48 +10:00
rheap.c powerpc: Various typo fixes 2016-06-14 13:58:26 +10:00
sstep.c powerpc/sstep: Fix kernel crash if VSX is not present 2018-06-04 00:39:08 +10:00
string_32.S powerpc/lib: optimise 32 bits __clear_user() 2018-06-04 00:39:21 +10:00
string_64.S powerpc: Fix invalid use of register expressions 2017-08-10 22:29:41 +10:00
string.S powerpc/lib: optimise PPC32 memcmp 2018-06-04 00:39:21 +10:00
test_emulate_step.c powerpc/sstep: Fix emulate_step test if VSX not present 2018-06-04 00:39:14 +10:00
vmx-helper.c powerpc: Introduce asm-prototypes.h 2016-06-16 22:39:54 +10:00
xor_vmx_glue.c powerpc/altivec: Add missing prototypes for altivec 2018-05-25 12:04:38 +10:00
xor_vmx.c powerpc/lib/xor_vmx: Ensure no altivec code executes before enable_kernel_altivec() 2017-06-02 20:17:52 +10:00
xor_vmx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00