/* Enumerate available IFUNC implementations of a function.  RISCV version.
   Copyright (C) 2024-2026 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/>.  */

#include <ifunc-impl-list.h>
#include <string.h>
#include <sys/hwprobe.h>

size_t
__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
			size_t max)
{
  size_t i = max;

  bool fast_unaligned = false;
  bool rvv_enabled = false;

  struct riscv_hwprobe pairs[2] = {
    {.key = RISCV_HWPROBE_KEY_CPUPERF_0},
    {.key = RISCV_HWPROBE_KEY_IMA_EXT_0}
  };

  if (__riscv_hwprobe (pairs, 2, 0, NULL, 0) == 0) {
    if ((pairs[0].value & RISCV_HWPROBE_MISALIGNED_MASK)
          == RISCV_HWPROBE_MISALIGNED_FAST)
      fast_unaligned = true;

    if (pairs[1].value & RISCV_HWPROBE_IMA_V)
      rvv_enabled = true;
  }

  IFUNC_IMPL (i, name, memcpy,
	      IFUNC_IMPL_ADD (array, i, memcpy, fast_unaligned,
			      __memcpy_noalignment)
	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_generic))

  IFUNC_IMPL (i, name, memset,
	      IFUNC_IMPL_ADD (array, i, memset, rvv_enabled,
			      __memset_vector)
	      IFUNC_IMPL_ADD (array, i, memset, 1, __memset_generic))

  return 0;
}
