glibc/sysdeps/powerpc/dl-procinfo.c

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/* Data for processor capability information. PowerPC version.
Copyright (C) 2005-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
/* This information must be kept in sync with the _DL_HWCAP_COUNT
definition in procinfo.h.
If anything should be added here check whether the size of each string
is still ok with the given array size.
All the #ifdefs in the definitions are quite irritating but
necessary if we want to avoid duplicating the information. There
are three different modes:
- PROCINFO_DECL is defined. This means we are only interested in
declarations.
- PROCINFO_DECL is not defined:
+ if SHARED is defined the file is included in an array
initializer. The .element = { ... } syntax is needed.
+ if SHARED is not defined a normal array initialization is
needed.
*/
#ifndef PROCINFO_CLASS
# define PROCINFO_CLASS
#endif
powerpc: POWER8 memcpy optimization for cached memory On POWER8, unaligned memory accesses to cached memory has little impact on performance as opposed to its ancestors. It is disabled by default and will only be available when the tunable glibc.tune.cached_memopt is set to 1. __memcpy_power8_cached __memcpy_power7 ============================================================ max-size=4096: 33325.70 ( 12.65%) 38153.00 max-size=8192: 32878.20 ( 11.17%) 37012.30 max-size=16384: 33782.20 ( 11.61%) 38219.20 max-size=32768: 33296.20 ( 11.30%) 37538.30 max-size=65536: 33765.60 ( 10.53%) 37738.40 * manual/tunables.texi (Hardware Capability Tunables): Document glibc.tune.cached_memopt. * sysdeps/powerpc/cpu-features.c: New file. * sysdeps/powerpc/cpu-features.h: New file. * sysdeps/powerpc/dl-procinfo.c [!IS_IN(ldconfig)]: Add _dl_powerpc_cpu_features. * sysdeps/powerpc/dl-tunables.list: New file. * sysdeps/powerpc/ldsodefs.h: Include cpu-features.h. * sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h (INIT_ARCH): Initialize use_aligned_memopt. * sysdeps/powerpc/powerpc64/dl-machine.h [defined(SHARED && IS_IN(rtld))]: Restrict dl_platform_init availability and initialize CPU features used by tunables. * sysdeps/powerpc/powerpc64/multiarch/Makefile (sysdep_routines): Add memcpy-power8-cached. * sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c: Add __memcpy_power8_cached. * sysdeps/powerpc/powerpc64/multiarch/memcpy.c: Likewise. * sysdeps/powerpc/powerpc64/multiarch/memcpy-power8-cached.S: New file. Reviewed-by: Rajalakshmi Srinivasaraghavan <raji@linux.vnet.ibm.com>
2017-12-11 19:39:42 +00:00
#if !IS_IN (ldconfig)
# if !defined PROCINFO_DECL && defined SHARED
._dl_powerpc_cpu_features
# else
PROCINFO_CLASS struct cpu_features _dl_powerpc_cpu_features
# endif
# ifndef PROCINFO_DECL
= { }
# endif
# if !defined SHARED || defined PROCINFO_DECL
;
# else
,
# endif
#endif
#if !defined PROCINFO_DECL && defined SHARED
._dl_powerpc_cap_flags
#else
PROCINFO_CLASS const char _dl_powerpc_cap_flags[64][15]
#endif
#ifndef PROCINFO_DECL
= {
"ppcle", "true_le", "", "",
"", "", "archpmu", "vsx",
"arch_2_06", "power6x", "dfp", "pa6t",
"arch_2_05", "ic_snoop", "smt", "booke",
"cellbe", "power5+", "power5", "power4",
"notb", "efpdouble", "efpsingle", "spe",
"ucache", "4xxmac", "mmu", "fpu",
"altivec", "ppc601", "ppc64", "ppc32",
"", "", "", "",
"", "", "", "",
"", "", "", "",
"", "", "", "",
"", "", "", "htm-no-suspend",
"scv", "darn", "ieee128", "arch_3_00",
"htm-nosc", "vcrypto", "tar", "isel",
"ebb", "dscr", "htm", "arch_2_07",
}
#endif
#if !defined SHARED || defined PROCINFO_DECL
;
#else
,
#endif
#undef PROCINFO_DECL
#undef PROCINFO_CLASS