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a8e72913fe
Cleanup memset ifunc selectors. The A64FX memset relies on a ZVA size of 256, so add an explicit check.
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/* Multiple versions of memset. AARCH64 version.
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Copyright (C) 2017-2022 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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/* Define multiple versions only for the definition in libc. */
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#if IS_IN (libc)
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/* Redefine memset so that the compiler won't complain about the type
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mismatch with the IFUNC selector in strong_alias, below. */
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# undef memset
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# define memset __redirect_memset
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# include <string.h>
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# include <init-arch.h>
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extern __typeof (__redirect_memset) __libc_memset;
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extern __typeof (__redirect_memset) __memset_falkor attribute_hidden;
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extern __typeof (__redirect_memset) __memset_emag attribute_hidden;
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extern __typeof (__redirect_memset) __memset_kunpeng attribute_hidden;
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extern __typeof (__redirect_memset) __memset_a64fx attribute_hidden;
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extern __typeof (__redirect_memset) __memset_generic attribute_hidden;
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static inline __typeof (__redirect_memset) *
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select_memset_ifunc (void)
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{
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INIT_ARCH ();
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if (sve && HAVE_AARCH64_SVE_ASM)
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{
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if (IS_A64FX (midr) && zva_size == 256)
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return __memset_a64fx;
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return __memset_generic;
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}
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if (IS_KUNPENG920 (midr))
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return __memset_kunpeng;
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if ((IS_FALKOR (midr) || IS_PHECDA (midr)) && zva_size == 64)
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return __memset_falkor;
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if (IS_EMAG (midr) && zva_size == 64)
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return __memset_emag;
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return __memset_generic;
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}
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libc_ifunc (__libc_memset, select_memset_ifunc ());
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# undef memset
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strong_alias (__libc_memset, memset);
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#endif
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