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/* Enumerate available IFUNC implementations of a function. s390/s390x version.
Copyright (C) 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 <ifunc-impl-list.h>
#include <ifunc-resolve.h>
/* Maximum number of IFUNC implementations. */
#define MAX_IFUNC 3
/* Fill ARRAY of MAX elements with IFUNC implementations for function
NAME supported on target machine and return the number of valid
entries. */
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;
/* Get hardware information. */
unsigned long int dl_hwcap = GLRO (dl_hwcap);
unsigned long long stfle_bits = 0ULL;
if ((dl_hwcap & HWCAP_S390_STFLE)
&& (dl_hwcap & HWCAP_S390_ZARCH)
&& (dl_hwcap & HWCAP_S390_HIGH_GPRS))
{
S390_STORE_STFLE (stfle_bits);
}
IFUNC_IMPL (i, name, memset,
IFUNC_IMPL_ADD (array, i, memset,
S390_IS_Z196 (stfle_bits), __memset_z196)
IFUNC_IMPL_ADD (array, i, memset,
S390_IS_Z10 (stfle_bits), __memset_z10)
IFUNC_IMPL_ADD (array, i, memset, 1, __memset_default))
IFUNC_IMPL (i, name, memcmp,
IFUNC_IMPL_ADD (array, i, memcmp,
S390_IS_Z196 (stfle_bits), __memcmp_z196)
IFUNC_IMPL_ADD (array, i, memcmp,
S390_IS_Z10 (stfle_bits), __memcmp_z10)
IFUNC_IMPL_ADD (array, i, memcmp, 1, __memcmp_default))
#ifdef SHARED
IFUNC_IMPL (i, name, memcpy,
IFUNC_IMPL_ADD (array, i, memcpy,
S390_IS_Z196 (stfle_bits), __memcpy_z196)
IFUNC_IMPL_ADD (array, i, memcpy,
S390_IS_Z10 (stfle_bits), __memcpy_z10)
IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_default))
#endif /* SHARED */
#ifdef HAVE_S390_VX_ASM_SUPPORT
# define IFUNC_VX_IMPL(FUNC) \
IFUNC_IMPL (i, name, FUNC, \
IFUNC_IMPL_ADD (array, i, FUNC, dl_hwcap & HWCAP_S390_VX, \
__##FUNC##_vx) \
IFUNC_IMPL_ADD (array, i, FUNC, 1, __##FUNC##_c))
IFUNC_VX_IMPL (strlen);
IFUNC_VX_IMPL (wcslen);
IFUNC_VX_IMPL (strnlen);
IFUNC_VX_IMPL (wcsnlen);
IFUNC_VX_IMPL (strcpy);
IFUNC_VX_IMPL (wcscpy);
#endif /* HAVE_S390_VX_ASM_SUPPORT */
return i;
}
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