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77 lines
2.2 KiB
ArmAsm
77 lines
2.2 KiB
ArmAsm
/* Multiple versions of memcpy
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2013-2017 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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<http://www.gnu.org/licenses/>. */
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/* Thumb requires excess IT instructions here. */
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#define NO_THUMB
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#include <sysdep.h>
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#include <rtld-global-offsets.h>
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#if IS_IN (libc)
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/* Under __ARM_NEON__, memcpy_neon.S defines the name memcpy. */
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# ifndef __ARM_NEON__
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.text
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ENTRY(memcpy)
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.type memcpy, %gnu_indirect_function
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# ifdef __SOFTFP__
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ldr r1, .Lmemcpy_arm
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tst r0, #HWCAP_ARM_VFP
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ldrne r1, .Lmemcpy_vfp
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# else
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ldr r1, .Lmemcpy_vfp
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# endif
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tst r0, #HWCAP_ARM_NEON
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ldrne r1, .Lmemcpy_neon
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1:
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add r0, r1, pc
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DO_RET(lr)
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# ifdef __SOFTFP__
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.Lmemcpy_arm:
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.long C_SYMBOL_NAME(__memcpy_arm) - 1b - PC_OFS
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# endif
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.Lmemcpy_neon:
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.long C_SYMBOL_NAME(__memcpy_neon) - 1b - PC_OFS
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.Lmemcpy_vfp:
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.long C_SYMBOL_NAME(__memcpy_vfp) - 1b - PC_OFS
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END(memcpy)
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libc_hidden_builtin_def (memcpy)
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#endif /* Not __ARM_NEON__. */
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/* These versions of memcpy are defined not to clobber any VFP or NEON
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registers so they must always call the ARM variant of the memcpy code. */
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strong_alias (__memcpy_arm, __aeabi_memcpy)
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strong_alias (__memcpy_arm, __aeabi_memcpy4)
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strong_alias (__memcpy_arm, __aeabi_memcpy8)
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libc_hidden_def (__memcpy_arm)
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#undef libc_hidden_builtin_def
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#define libc_hidden_builtin_def(name)
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#undef weak_alias
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#define weak_alias(x, y)
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#undef libc_hidden_def
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#define libc_hidden_def(name)
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#define memcpy __memcpy_arm
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#endif
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#include "memcpy_impl.S"
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