2010-06-30 15:26:11 +00:00
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/* Multiple versions of __memcpy_chk
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2012-10-10 14:49:12 +00:00
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All versions must be listed in ifunc-impl-list.c.
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2017-01-01 00:14:16 +00:00
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Copyright (C) 2010-2017 Free Software Foundation, Inc.
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2010-06-30 15:26:11 +00:00
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Contributed by Intel Corporation.
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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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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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2010-06-30 15:26:11 +00:00
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#include <sysdep.h>
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#include <init-arch.h>
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/* Define multiple versions only for the definition in lib and for
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DSO. There are no multiarch memcpy functions for static binaries.
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*/
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2014-11-24 09:33:45 +00:00
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#if IS_IN (libc)
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2010-06-30 15:26:11 +00:00
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# ifdef SHARED
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.text
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ENTRY(__memcpy_chk)
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.type __memcpy_chk, @gnu_indirect_function
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2015-08-13 10:38:47 +00:00
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LOAD_RTLD_GLOBAL_RO_RDX
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2016-01-15 21:49:45 +00:00
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HAS_ARCH_FEATURE (AVX512F_Usable)
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2016-06-08 20:57:50 +00:00
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jz 1f
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lea __memcpy_chk_avx512_no_vzeroupper(%rip), %RAX_LP
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2016-01-16 11:42:26 +00:00
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HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
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2016-06-08 20:57:50 +00:00
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jnz 2f
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lea __memcpy_chk_avx512_unaligned_erms(%rip), %RAX_LP
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HAS_CPU_FEATURE (ERMS)
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jnz 2f
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lea __memcpy_chk_avx512_unaligned(%rip), %RAX_LP
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2016-01-15 21:49:45 +00:00
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ret
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2016-06-08 20:57:50 +00:00
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1: lea __memcpy_chk_avx_unaligned(%rip), %RAX_LP
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HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
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jz L(Fast_Unaligned_Load)
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HAS_CPU_FEATURE (ERMS)
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jz 2f
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lea __memcpy_chk_avx_unaligned_erms(%rip), %RAX_LP
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ret
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L(Fast_Unaligned_Load):
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lea __memcpy_chk_sse2_unaligned(%rip), %RAX_LP
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HAS_ARCH_FEATURE (Fast_Unaligned_Copy)
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jz L(SSSE3)
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HAS_CPU_FEATURE (ERMS)
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jz 2f
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lea __memcpy_chk_sse2_unaligned_erms(%rip), %RAX_LP
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ret
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L(SSSE3):
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2015-08-13 10:38:47 +00:00
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HAS_CPU_FEATURE (SSSE3)
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2010-06-30 15:26:11 +00:00
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jz 2f
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2016-06-08 20:57:50 +00:00
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lea __memcpy_chk_ssse3_back(%rip), %RAX_LP
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2015-08-13 10:38:47 +00:00
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HAS_ARCH_FEATURE (Fast_Copy_Backward)
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2016-06-08 20:57:50 +00:00
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jnz 2f
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lea __memcpy_chk_ssse3(%rip), %RAX_LP
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2010-06-30 15:26:11 +00:00
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2: ret
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END(__memcpy_chk)
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# else
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# include "../memcpy_chk.S"
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# endif
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#endif
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