2 Copyright (c) 2015-2024, Synopsys, Inc. All rights reserved.
4 Redistribution and use in source and binary forms, with or without
5 modification, are permitted provided that the following conditions are met:
7 1) Redistributions of source code must retain the above copyright notice,
8 this list of conditions and the following disclaimer.
10 2) Redistributions in binary form must reproduce the above copyright notice,
11 this list of conditions and the following disclaimer in the documentation
12 and/or other materials provided with the distribution.
14 3) Neither the name of the Synopsys, Inc., nor the names of its contributors
15 may be used to endorse or promote products derived from this software
16 without specific prior written permission.
18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
22 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 POSSIBILITY OF SUCH DAMAGE.
31 /* This implementation is optimized for performance. For code size a generic
32 implementation of this function from newlib/libc/string/memcpy.c will be
34 #if !defined (__OPTIMIZE_SIZE__) && !defined (PREFER_SIZE_OVER_SPEED) \
35 && !defined (__ARC_RF16__)
39 #if !defined (__ARC601__) && !defined (__ARCHS__) \
40 && defined (__ARC_BARREL_SHIFTER__)
42 /* Mostly optimized for ARC700, but not bad for ARC600 either. */
43 /* This memcpy implementation does not support objects of 1GB or larger -
44 the check for alignment does not work then. */
45 /* We assume that most sources and destinations are aligned, and
46 that also lengths are mostly a multiple of four, although to a lesser
52 brls.d r2,r3,.Lcopy_bytewise
67 breq_l r2,0,.Last_store
69 #ifdef __LITTLE_ENDIAN__
75 #else /* BIG ENDIAN */
104 #endif /* !__ARC601__ && !__ARCHS__ && __ARC_BARREL_SHIFTER__ */
106 #endif /* !__OPTIMIZE_SIZE__ && !PREFER_SIZE_OVER_SPEED */