glibc/sysdeps/powerpc
Adhemerval Zanella ce6615c9c6 powerpc: Fix POWER7/PPC64 performance regression on LE
This patch fixes a performance regression on the POWER7/PPC64 memcmp
porting for Little Endian.  The LE code uses 'ldbrx' instruction to read
the memory on byte reversed form, however ISA 2.06 just provide the indexed
form which uses a register value as additional index, instead of a fixed value
enconded in the instruction.

And the port strategy for LE uses r0 index value and update the address
value on each compare loop interation.  For large compare size values,
it adds 8 more instructions plus some more depending of trailing
size.  This patch fixes it by adding pre-calculate indexes to remove the
address update on loops and tailing sizes.

For large sizes it shows a considerable gain, with double performance
pairing with BE.
2015-01-13 14:35:40 -05:00
..
bits Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
fpu Fix libm feupdateenv namespace (bug 17748). 2015-01-07 19:01:20 +00:00
nofpu Fix libm feupdateenv namespace (bug 17748). 2015-01-07 19:01:20 +00:00
nptl powerpc: Fix Copyright dates and CL entry 2015-01-12 12:58:34 -05:00
power4 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power5+/fpu Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power6 Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
power7/fpu Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
powerpc32 powerpc: abort transaction in syscalls 2015-01-12 06:32:08 -05:00
powerpc64 powerpc: Fix POWER7/PPC64 performance regression on LE 2015-01-13 14:35:40 -05:00
soft-fp soft-fp: support after-rounding tininess detection. 2014-02-12 18:27:12 +00:00
sys/platform Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
abort-instr.h
configure rename configure.in to configure.ac 2013-10-30 17:32:08 +10:00
configure.ac rename configure.in to configure.ac 2013-10-30 17:32:08 +10:00
dl-procinfo.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-procinfo.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
dl-tls.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ffs.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
fpu_control.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
gccframe.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ifunc-sel.h Move sysdeps/powerpc/elf files 2012-03-28 09:25:31 +02:00
Implies PowerPC: unify math_ldbl.h implementations 2013-03-08 11:07:15 -03:00
jmpbuf-offsets.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
jmpbuf-unwind.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
ldsodefs.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
locale-defines.sym Optimized strcasecmp for Power7 2011-12-17 20:32:59 -05:00
longjmp.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
machine-gmon.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
Makefile abilist-pattern configurability 2014-02-04 09:48:47 -02:00
math-tests.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
memusage.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
mp_clz_tab.c
novmx-longjmp.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
novmx-sigjmp.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
novmxsetjmp.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
preconfigure Move base_machine and machine settings from configure.ac to sysdeps preconfigure fragments. 2014-06-25 17:52:56 +00:00
rtld-global-offsets.sym PowerPC: Define AT_HWCAP2 bits and AT_HWCAP2 handling for POWER8. 2013-06-28 16:52:49 -05:00
sched_cpucount.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sigjmp.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sotruss-lib.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
stackinfo.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
strcat.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
sysdep.h powerpc: abort transaction in syscalls 2015-01-12 06:32:08 -05:00
test-arith.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
test-arithf.c
test-gettimebase.c Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
tls-macros.h Split tls-macros.h in sysdeps directories. 2012-07-19 17:04:04 -03:00
tst-stack-align.h Update copyright dates with scripts/update-copyrights. 2015-01-02 16:29:47 +00:00
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