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9f298bfe1f
Add an initial SVE memcpy implementation. Copies up to 32 bytes use SVE vectors which improves the random memcpy benchmark significantly. Cleanup the memcpy and memmove ifunc selectors.
71 lines
2.3 KiB
C
71 lines
2.3 KiB
C
/* Multiple versions of memcpy. 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 memcpy 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 memcpy
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# define memcpy __redirect_memcpy
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# include <string.h>
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# include <init-arch.h>
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extern __typeof (__redirect_memcpy) __libc_memcpy;
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extern __typeof (__redirect_memcpy) __memcpy_generic attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_simd attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_thunderx attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_thunderx2 attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_falkor attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_a64fx attribute_hidden;
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extern __typeof (__redirect_memcpy) __memcpy_sve attribute_hidden;
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static inline __typeof (__redirect_memcpy) *
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select_memcpy_ifunc (void)
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{
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INIT_ARCH ();
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if (IS_NEOVERSE_N1 (midr) || IS_NEOVERSE_N2 (midr))
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return __memcpy_simd;
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if (sve && HAVE_AARCH64_SVE_ASM)
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{
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if (IS_A64FX (midr))
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return __memcpy_a64fx;
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return __memcpy_sve;
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}
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if (IS_THUNDERX (midr))
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return __memcpy_thunderx;
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if (IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr))
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return __memcpy_thunderx2;
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if (IS_FALKOR (midr) || IS_PHECDA (midr))
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return __memcpy_falkor;
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return __memcpy_generic;
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}
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libc_ifunc (__libc_memcpy, select_memcpy_ifunc ());
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# undef memcpy
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strong_alias (__libc_memcpy, memcpy);
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#endif
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