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44 lines
1.5 KiB
C
44 lines
1.5 KiB
C
/* Enumerate available IFUNC implementations of a function. RISCV version.
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Copyright (C) 2024-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <ifunc-impl-list.h>
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#include <string.h>
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#include <sys/hwprobe.h>
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size_t
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__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
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size_t max)
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{
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size_t i = max;
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bool fast_unaligned = false;
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struct riscv_hwprobe pair = { .key = RISCV_HWPROBE_KEY_CPUPERF_0 };
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if (__riscv_hwprobe (&pair, 1, 0, NULL, 0) == 0
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&& (pair.value & RISCV_HWPROBE_MISALIGNED_MASK)
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== RISCV_HWPROBE_MISALIGNED_FAST)
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fast_unaligned = true;
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IFUNC_IMPL (i, name, memcpy,
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IFUNC_IMPL_ADD (array, i, memcpy, fast_unaligned,
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__memcpy_noalignment)
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IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_generic))
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return 0;
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}
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