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/* Multiple versions of memcpy.
All versions must be listed in ifunc-impl-list.c.
Copyright (C) 2017-2024 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
<https://www.gnu.org/licenses/>. */
#if IS_IN (libc)
/* Redefine memcpy so that the compiler won't complain about the type
mismatch with the IFUNC selector in strong_alias, below. */
# undef memcpy
# define memcpy __redirect_memcpy
# include <stdint.h>
# include <string.h>
# include <ifunc-init.h>
# include <riscv-ifunc.h>
# include <sys/hwprobe.h>
# define INIT_ARCH()
extern __typeof (__redirect_memcpy) __libc_memcpy;
extern __typeof (__redirect_memcpy) __memcpy_generic attribute_hidden;
extern __typeof (__redirect_memcpy) __memcpy_noalignment attribute_hidden;
static inline __typeof (__redirect_memcpy) *
select_memcpy_ifunc (uint64_t dl_hwcap, __riscv_hwprobe_t hwprobe_func)
{
unsigned long long int value;
INIT_ARCH ();
if (__riscv_hwprobe_one (hwprobe_func, RISCV_HWPROBE_KEY_CPUPERF_0, &value) != 0)
return __memcpy_generic;
if ((value & RISCV_HWPROBE_MISALIGNED_MASK) == RISCV_HWPROBE_MISALIGNED_FAST)
return __memcpy_noalignment;
return __memcpy_generic;
}
riscv_libc_ifunc (__libc_memcpy, select_memcpy_ifunc);
# undef memcpy
strong_alias (__libc_memcpy, memcpy);
# ifdef SHARED
__hidden_ver1 (memcpy, __GI_memcpy, __redirect_memcpy)
__attribute__ ((visibility ("hidden"))) __attribute_copy__ (memcpy);
# endif
#endif
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