Alexey Dobriyan 890890cb8e x86/i386: Use less assembly in strlen(), speed things up a bit ... Current i386 strlen() hardcodes NOT/DEC sequence. DEC is mentioned to be suboptimal on Core2. So, put only REPNE SCASB sequence in assembly, compiler can do the rest. The difference in generated code is like below (MCORE2=y): <strlen>: push %edi mov $0xffffffff,%ecx mov %eax,%edi xor %eax,%eax repnz scas %es:(%edi),%al not %ecx - dec %ecx - mov %ecx,%eax + lea -0x1(%ecx),%eax pop %edi ret Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Jan Beulich <JBeulich@suse.com> Link: http://lkml.kernel.org/r/20111211181319.GA17097@p183.telecom.by Signed-off-by: Ingo Molnar <mingo@elte.hu>		2011-12-12 18:33:42 +01:00
..
.gitignore	x86: Gitignore: arch/x86/lib/inat-tables.c	2009-11-04 13:11:28 +01:00
atomic64_32.c	atomic: use <linux/atomic.h>	2011-07-26 16:49:47 -07:00
atomic64_386_32.S	x86: Use {push,pop}_cfi in more places	2011-02-28 18:06:22 +01:00
atomic64_cx8_32.S	x86: Use {push,pop}_cfi in more places	2011-02-28 18:06:22 +01:00
cache-smp.c	x86, lib: Add wbinvd smp helpers	2010-01-22 16:05:42 -08:00
checksum_32.S	x86: Use {push,pop}_cfi in more places	2011-02-28 18:06:22 +01:00
clear_page_64.S	x86, mem: clear_page_64.S: Support clear_page() with enhanced REP MOVSB/STOSB	2011-05-17 15:40:27 -07:00
cmpxchg.c	x86, asm: Merge cmpxchg_486_u64() and cmpxchg8b_emu()	2010-07-28 17:05:11 -07:00
cmpxchg8b_emu.S	x86: Provide an alternative() based cmpxchg64()	2009-09-30 22:55:59 +02:00
cmpxchg16b_emu.S	percpu: Omit segment prefix in the UP case for cmpxchg_double	2011-03-27 19:25:36 -07:00
copy_page_64.S	x86: Make alternative instruction pointers relative	2011-07-13 11:22:56 -07:00
copy_user_64.S	x86, 64-bit: Fix copy_[to/from]_user() checks for the userspace address limit	2011-05-18 12:49:00 +02:00
copy_user_nocache_64.S	x86: wrong register was used in align macro	2008-07-30 10:10:39 -07:00
csum-copy_64.S	x86: Clean up csum-copy_64.S a bit	2011-03-18 10:44:26 +01:00
csum-partial_64.c	x86: Fix common misspellings	2011-03-18 10:39:30 +01:00
csum-wrappers_64.c	x86: clean up csum-wrappers_64.c some more	2008-02-19 16:18:32 +01:00
delay.c	x86: udelay: Use this_cpu_read to avoid address calculation	2011-01-04 06:08:55 +01:00
getuser.S	x86: use _types.h headers in asm where available	2009-02-13 11:35:01 -08:00
inat.c	x86: AVX instruction set decoder support	2009-10-29 08:47:46 +01:00
insn.c	x86: Fix insn decoder for longer instruction	2011-10-10 09:05:51 +02:00
iomap_copy_64.S	x86_64: move lib	2007-10-11 11:17:08 +02:00
Makefile	Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-07-22 17:02:24 -07:00
memcpy_32.c	x86, mem: Optimize memmove for small size and unaligned cases	2010-09-24 18:57:11 -07:00
memcpy_64.S	Merge branches 'x86-apic-for-linus', 'x86-asm-for-linus' and 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip	2011-05-19 17:49:35 -07:00
memmove_64.S	x86: Make alternative instruction pointers relative	2011-07-13 11:22:56 -07:00
memset_64.S	x86, mem: memset_64.S: Optimize memset by enhanced REP MOVSB/STOSB	2011-05-17 15:40:31 -07:00
mmx_32.c	x86: clean up mmx_32.c	2008-04-17 17:40:47 +02:00
msr-reg-export.c	x86, msr: change msr-reg.o to obj-y, and export its symbols	2009-09-04 10:00:09 -07:00
msr-reg.S	x86, msr: Fix msr-reg.S compilation with gas 2.16.1, on 32-bit too	2009-09-03 21:26:34 +02:00
msr-smp.c	x86, msr: msrs_alloc/free for CONFIG_SMP=n	2009-12-16 15:36:32 -08:00
msr.c	x86, msr: msrs_alloc/free for CONFIG_SMP=n	2009-12-16 15:36:32 -08:00
putuser.S	x86: merge putuser asm functions.	2008-07-09 09:14:13 +02:00
rwlock.S	x86: Fix write lock scalability 64-bit issue	2011-07-21 09:03:36 +02:00
rwsem.S	x86: Unify rwsem assembly implementation	2011-07-21 09:03:32 +02:00
string_32.c	x86/i386: Use less assembly in strlen(), speed things up a bit	2011-12-12 18:33:42 +01:00
strstr_32.c	x86: coding style fixes to arch/x86/lib/strstr_32.c	2008-08-15 16:53:24 +02:00
thunk_32.S	x86: Remove unused bits from lib/thunk_*.S	2011-02-28 18:06:22 +01:00
thunk_64.S	x86: Fix write lock scalability 64-bit issue	2011-07-21 09:03:36 +02:00
usercopy.c	x86, perf: Make copy_from_user_nmi() a library function	2011-07-21 20:41:57 +02:00
usercopy_32.c	x86: Turn the copy_from_user check into an (optional) compile time warning	2009-10-01 11:31:04 +02:00
usercopy_64.c	x86, 64-bit: Clean up user address masking	2009-06-20 15:40:00 -07:00
x86-opcode-map.txt	x86: Add Intel FMA instructions to x86 opcode map	2009-10-29 08:47:47 +01:00