AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-29 16:21:07 +00:00
Code Issues Packages Projects Releases Wiki Activity
5be91118f6
glibc/sysdeps/powerpc/powerpc64/multiarch/ifunc-impl-list.c
Adhemerval Zanella d3b00f468b powerpc: Optimized strncmp for POWER8/PPC64 
This patch adds an optimized POWER8 strncmp.  The implementation focus
on speeding up unaligned cases follwing the ideas of power8 strcmp.

The algorithm first check the initial 16 bytes, then align the first
function source and uses unaligned loads on second argument only.
Aditional checks for page boundaries are done for unaligned cases
(where sources alignment are different).
2015-01-13 14:35:40 -05:00

327 lines
12 KiB
C
Raw Blame History

/* Enumerate available IFUNC implementations of a function. PowerPC64 version.
Copyright (C) 2013-2015 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/>. */
#include <assert.h>
#include <string.h>
#include <wchar.h>
#include <ldsodefs.h>
#include <ifunc-impl-list.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 6
size_t
__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
size_t max)
{
assert (max >= MAX_IFUNC);
size_t i = 0;
unsigned long int hwcap = GLRO(dl_hwcap);
unsigned long int hwcap2 = GLRO(dl_hwcap2);
/* hwcap contains only the latest supported ISA, the code checks which is
and fills the previous supported ones. */
if (hwcap & PPC_FEATURE_ARCH_2_06)
hwcap |= PPC_FEATURE_ARCH_2_05 | PPC_FEATURE_POWER5_PLUS |
PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
else if (hwcap & PPC_FEATURE_ARCH_2_05)
hwcap |= PPC_FEATURE_POWER5_PLUS | PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
else if (hwcap & PPC_FEATURE_POWER5_PLUS)
hwcap |= PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
else if (hwcap & PPC_FEATURE_POWER5)
hwcap |= PPC_FEATURE_POWER4;
#ifdef SHARED
/* Support sysdeps/powerpc/powerpc64/multiarch/memcpy.c. */
IFUNC_IMPL (i, name, memcpy,
IFUNC_IMPL_ADD (array, i, memcpy, hwcap & PPC_FEATURE_HAS_VSX,
__memcpy_power7)
IFUNC_IMPL_ADD (array, i, memcpy, hwcap & PPC_FEATURE_ARCH_2_06,
__memcpy_a2)
IFUNC_IMPL_ADD (array, i, memcpy, hwcap & PPC_FEATURE_ARCH_2_05,
__memcpy_power6)
IFUNC_IMPL_ADD (array, i, memcpy, hwcap & PPC_FEATURE_CELL_BE,
__memcpy_cell)
IFUNC_IMPL_ADD (array, i, memcpy, hwcap & PPC_FEATURE_POWER4,
__memcpy_power4)
IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/memmove.c. */
IFUNC_IMPL (i, name, memmove,
IFUNC_IMPL_ADD (array, i, memmove, hwcap & PPC_FEATURE_HAS_VSX,
__memmove_power7)
IFUNC_IMPL_ADD (array, i, memmove, 1, __memmove_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/memset.c. */
IFUNC_IMPL (i, name, memset,
IFUNC_IMPL_ADD (array, i, memset, hwcap2 & PPC_FEATURE2_ARCH_2_07,
__memset_power8)
IFUNC_IMPL_ADD (array, i, memset, hwcap & PPC_FEATURE_HAS_VSX,
__memset_power7)
IFUNC_IMPL_ADD (array, i, memset, hwcap & PPC_FEATURE_ARCH_2_05,
__memset_power6)
IFUNC_IMPL_ADD (array, i, memset, hwcap & PPC_FEATURE_POWER4,
__memset_power4)
IFUNC_IMPL_ADD (array, i, memset, 1, __memset_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strcpy.c. */
IFUNC_IMPL (i, name, strcpy,
IFUNC_IMPL_ADD (array, i, strcpy, hwcap2 & PPC_FEATURE2_ARCH_2_07,
__strcpy_power8)
IFUNC_IMPL_ADD (array, i, strcpy, hwcap & PPC_FEATURE_HAS_VSX,
__strcpy_power7)
IFUNC_IMPL_ADD (array, i, strcpy, 1,
__strcpy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/stpcpy.c. */
IFUNC_IMPL (i, name, stpcpy,
IFUNC_IMPL_ADD (array, i, stpcpy, hwcap2 & PPC_FEATURE2_ARCH_2_07,
__stpcpy_power8)
IFUNC_IMPL_ADD (array, i, stpcpy, hwcap & PPC_FEATURE_HAS_VSX,
__stpcpy_power7)
IFUNC_IMPL_ADD (array, i, stpcpy, 1,
__stpcpy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strlen.c. */
IFUNC_IMPL (i, name, strlen,
IFUNC_IMPL_ADD (array, i, strlen, hwcap & PPC_FEATURE_HAS_VSX,
__strlen_power7)
IFUNC_IMPL_ADD (array, i, strlen, 1,
__strlen_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strncmp.c. */
IFUNC_IMPL (i, name, strncmp,
IFUNC_IMPL_ADD (array, i, strncmp, hwcap2 & PPC_FEATURE2_ARCH_2_07,
__strncmp_power8)
IFUNC_IMPL_ADD (array, i, strncmp, hwcap & PPC_FEATURE_HAS_VSX,
__strncmp_power7)
IFUNC_IMPL_ADD (array, i, strncmp, hwcap & PPC_FEATURE_POWER4,
__strncmp_power4)
IFUNC_IMPL_ADD (array, i, strncmp, 1,
__strncmp_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strchr.c. */
IFUNC_IMPL (i, name, strchr,
IFUNC_IMPL_ADD (array, i, strchr,
hwcap & PPC_FEATURE_HAS_VSX,
__strchr_power7)
IFUNC_IMPL_ADD (array, i, strchr, 1,
__strchr_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strchrnul.c. */
IFUNC_IMPL (i, name, strchrnul,
IFUNC_IMPL_ADD (array, i, strchrnul,
hwcap & PPC_FEATURE_HAS_VSX,
__strchrnul_power7)
IFUNC_IMPL_ADD (array, i, strchrnul, 1,
__strchrnul_ppc))
#endif
/* Support sysdeps/powerpc/powerpc64/multiarch/memcmp.c. */
IFUNC_IMPL (i, name, memcmp,
IFUNC_IMPL_ADD (array, i, memcmp, hwcap & PPC_FEATURE_HAS_VSX,
__memcmp_power7)
IFUNC_IMPL_ADD (array, i, memcmp, hwcap & PPC_FEATURE_POWER4,
__memcmp_power4)
IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/bzero.c. */
IFUNC_IMPL (i, name, bzero,
IFUNC_IMPL_ADD (array, i, bzero, hwcap2 & PPC_FEATURE2_ARCH_2_07,
__bzero_power8)
IFUNC_IMPL_ADD (array, i, bzero, hwcap & PPC_FEATURE_HAS_VSX,
__bzero_power7)
IFUNC_IMPL_ADD (array, i, bzero, hwcap & PPC_FEATURE_ARCH_2_05,
__bzero_power6)
IFUNC_IMPL_ADD (array, i, bzero, hwcap & PPC_FEATURE_POWER4,
__bzero_power4)
IFUNC_IMPL_ADD (array, i, bzero, 1, __bzero_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/bcopy.c. */
IFUNC_IMPL (i, name, bcopy,
IFUNC_IMPL_ADD (array, i, bcopy, hwcap & PPC_FEATURE_HAS_VSX,
__bcopy_power7)
IFUNC_IMPL_ADD (array, i, bcopy, 1, __bcopy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/mempcpy.c. */
IFUNC_IMPL (i, name, mempcpy,
IFUNC_IMPL_ADD (array, i, mempcpy,
hwcap & PPC_FEATURE_HAS_VSX,
__mempcpy_power7)
IFUNC_IMPL_ADD (array, i, mempcpy, 1,
__mempcpy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/memchr.c. */
IFUNC_IMPL (i, name, memchr,
IFUNC_IMPL_ADD (array, i, memchr,
hwcap & PPC_FEATURE_HAS_VSX,
__memchr_power7)
IFUNC_IMPL_ADD (array, i, memchr, 1,
__memchr_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/memrchr.c. */
IFUNC_IMPL (i, name, memrchr,
IFUNC_IMPL_ADD (array, i, memrchr,
hwcap & PPC_FEATURE_HAS_VSX,
__memrchr_power7)
IFUNC_IMPL_ADD (array, i, memrchr, 1,
__memrchr_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/rawmemchr.c. */
IFUNC_IMPL (i, name, rawmemchr,
IFUNC_IMPL_ADD (array, i, rawmemchr,
hwcap & PPC_FEATURE_HAS_VSX,
__rawmemchr_power7)
IFUNC_IMPL_ADD (array, i, rawmemchr, 1,
__rawmemchr_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strnlen.c. */
IFUNC_IMPL (i, name, strnlen,
IFUNC_IMPL_ADD (array, i, strnlen, hwcap & PPC_FEATURE_HAS_VSX,
__strnlen_power7)
IFUNC_IMPL_ADD (array, i, strnlen, 1,
__strnlen_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strcasecmp.c. */
IFUNC_IMPL (i, name, strcasecmp,
IFUNC_IMPL_ADD (array, i, strcasecmp,
hwcap & PPC_FEATURE_HAS_VSX,
__strcasecmp_power7)
IFUNC_IMPL_ADD (array, i, strcasecmp, 1, __strcasecmp_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strcasecmp_l.c. */
IFUNC_IMPL (i, name, strcasecmp_l,
IFUNC_IMPL_ADD (array, i, strcasecmp_l,
hwcap & PPC_FEATURE_HAS_VSX,
__strcasecmp_l_power7)
IFUNC_IMPL_ADD (array, i, strcasecmp_l, 1,
__strcasecmp_l_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strncase.c. */
IFUNC_IMPL (i, name, strncasecmp,
IFUNC_IMPL_ADD (array, i, strncasecmp,
hwcap & PPC_FEATURE_HAS_VSX,
__strncasecmp_power7)
IFUNC_IMPL_ADD (array, i, strncasecmp, 1, __strncasecmp_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strncase_l.c. */
IFUNC_IMPL (i, name, strncasecmp_l,
IFUNC_IMPL_ADD (array, i, strncasecmp_l,
hwcap & PPC_FEATURE_HAS_VSX,
__strncasecmp_l_power7)
IFUNC_IMPL_ADD (array, i, strncasecmp_l, 1,
__strncasecmp_l_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/wcschr.c. */
IFUNC_IMPL (i, name, wcschr,
IFUNC_IMPL_ADD (array, i, wcschr,
hwcap & PPC_FEATURE_HAS_VSX,
__wcschr_power7)
IFUNC_IMPL_ADD (array, i, wcschr,
hwcap & PPC_FEATURE_ARCH_2_05,
__wcschr_power6)
IFUNC_IMPL_ADD (array, i, wcschr, 1,
__wcschr_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/wcschr.c. */
IFUNC_IMPL (i, name, wcsrchr,
IFUNC_IMPL_ADD (array, i, wcsrchr,
hwcap & PPC_FEATURE_HAS_VSX,
__wcsrchr_power7)
IFUNC_IMPL_ADD (array, i, wcsrchr,
hwcap & PPC_FEATURE_ARCH_2_05,
__wcsrchr_power6)
IFUNC_IMPL_ADD (array, i, wcsrchr, 1,
__wcsrchr_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/wcscpy.c. */
IFUNC_IMPL (i, name, wcscpy,
IFUNC_IMPL_ADD (array, i, wcscpy,
hwcap & PPC_FEATURE_HAS_VSX,
__wcscpy_power7)
IFUNC_IMPL_ADD (array, i, wcscpy,
hwcap & PPC_FEATURE_ARCH_2_05,
__wcscpy_power6)
IFUNC_IMPL_ADD (array, i, wcscpy, 1,
__wcscpy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strrchr.c. */
IFUNC_IMPL (i, name, strrchr,
IFUNC_IMPL_ADD (array, i, strrchr,
hwcap & PPC_FEATURE_HAS_VSX,
__strrchr_power7)
IFUNC_IMPL_ADD (array, i, strrchr, 1,
__strrchr_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strncat.c. */
IFUNC_IMPL (i, name, strncat,
IFUNC_IMPL_ADD (array, i, strncat,
hwcap & PPC_FEATURE_HAS_VSX,
__strncat_power7)
IFUNC_IMPL_ADD (array, i, strncat, 1,
__strncat_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strncpy.c. */
IFUNC_IMPL (i, name, strncpy,
IFUNC_IMPL_ADD (array, i, strncpy,
hwcap2 & PPC_FEATURE2_ARCH_2_07,
__strncpy_power8)
IFUNC_IMPL_ADD (array, i, strncpy,
hwcap & PPC_FEATURE_HAS_VSX,
__strncpy_power7)
IFUNC_IMPL_ADD (array, i, strncpy, 1,
__strncpy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/stpncpy.c. */
IFUNC_IMPL (i, name, stpncpy,
IFUNC_IMPL_ADD (array, i, stpncpy,
hwcap2 & PPC_FEATURE2_ARCH_2_07,
__stpncpy_power8)
IFUNC_IMPL_ADD (array, i, stpncpy,
hwcap & PPC_FEATURE_HAS_VSX,
__stpncpy_power7)
IFUNC_IMPL_ADD (array, i, stpncpy, 1,
__stpncpy_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strcmp.c. */
IFUNC_IMPL (i, name, strcmp,
IFUNC_IMPL_ADD (array, i, strcmp,
hwcap2 & PPC_FEATURE2_ARCH_2_07,
__strcmp_power8)
IFUNC_IMPL_ADD (array, i, strcmp,
hwcap & PPC_FEATURE_HAS_VSX,
__strcmp_power7)
IFUNC_IMPL_ADD (array, i, strcmp, 1,
__strcmp_ppc))
/* Support sysdeps/powerpc/powerpc64/multiarch/strcat.c. */
IFUNC_IMPL (i, name, strcat,
IFUNC_IMPL_ADD (array, i, strcat,
hwcap2 & PPC_FEATURE2_ARCH_2_07,
__strcat_power8)
IFUNC_IMPL_ADD (array, i, strcat,
hwcap & PPC_FEATURE_HAS_VSX,
__strcat_power7)
IFUNC_IMPL_ADD (array, i, strcat, 1,
__strcat_ppc))
return i;
}
Reference in New Issue View Git Blame Copy Permalink