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Add missing libc/machine/arm/aeabi_memcpy.c file

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Corinna Vinschen 2014-09-05 08:42:45 +00:00
parent 9adec6fd79
commit a015d9b507
1 changed files with 64 additions and 0 deletions
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newlib/libc/machine/arm/aeabi_memcpy.c Normal file
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/*
* Copyright (c) 2014 ARM Ltd
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the company may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stddef.h>
#include <_ansi.h>
/* According to the Run-time ABI for the ARM Architecture. This
function is allowed to corrupt only the integer core register
permitted to be corrupted by the [AAPCS] (r0-r3, ip, lr, and
CPSR).
The FP registers are used in memcpy for target __ARM_ARCH_7A.
Therefore, we can't just simply use alias to support the function
aeabi_memcpy for target __ARM_ARCH_7A. Instead, we choose the
previous versions of memcpy to suppport it as an alternative. */
/* NOTE: This ifdef MUST match the one in aeabi_memcpy-armv7a.S. */
#if defined (__ARM_ARCH_7A__) && defined (__ARM_FEATURE_UNALIGNED) && \
(defined (__ARM_NEON__) || !defined (__SOFTFP__))
/* Defined in aeabi_memcpy-armv7a.S. */
#else
/* Support the alias for the __aeabi_memcpy which may
assume memory alignment. */
void __aeabi_memcpy4 (void *dest, const void *source, size_t n)
_ATTRIBUTE ((alias ("__aeabi_memcpy")));
void __aeabi_memcpy8 (void *dest, const void *source, size_t n)
_ATTRIBUTE ((alias ("__aeabi_memcpy")));
/* Support the routine __aeabi_memcpy. Can't alias to memcpy
because it's not defined in the same translation unit. */
void __aeabi_memcpy (void *dest, const void *source, size_t n)
{
extern void memcpy (void *dest, const void *source, size_t n);
memcpy (dest, source, n);
}
#endif