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- /*
- * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com)
- * Copyright (C) 2007 ARC International (UK) LTD
- *
- * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
- */
- #include <sysdep.h>
- /* This memcpy implementation does not support objects of 1GB or larger -
- the check for alignment does not work then. */
- /* We assume that most sources and destinations are aligned, and
- that also lengths are mostly a multiple of four, although to a lesser
- extent. */
- ENTRY(memcpy)
- or r3,r0,r1
- asl_s r3,r3,30
- mov_s r5,r0
- brls.d r2,r3,.Lcopy_bytewise
- sub.f r3,r2,1
- ld_s r12,[r1,0]
- asr.f lp_count,r3,3
- bbit0.d r3,2,.Lnox4
- bmsk_s r2,r2,1
- st.ab r12,[r5,4]
- ld.a r12,[r1,4]
- .Lnox4:
- lppnz .Lendloop
- ld_s r3,[r1,4]
- st.ab r12,[r5,4]
- ld.a r12,[r1,8]
- st.ab r3,[r5,4]
- .Lendloop:
- breq r2,0,.Last_store
- ld r3,[r5,0]
- #ifdef __LITTLE_ENDIAN__
- add3 r2,-1,r2
- ; uses long immediate
- xor_s r12,r12,r3
- bmsk r12,r12,r2
- xor_s r12,r12,r3
- #else /* BIG ENDIAN */
- sub3 r2,31,r2
- ; uses long immediate
- xor_s r3,r3,r12
- bmsk r3,r3,r2
- xor_s r12,r12,r3
- #endif /* ENDIAN */
- .Last_store:
- j_s.d [blink]
- st r12,[r5,0]
- .balign 4
- .Lcopy_bytewise:
- jcs [blink]
- ldb_s r12,[r1,0]
- lsr.f lp_count,r3
- bhs_s .Lnox1
- stb.ab r12,[r5,1]
- ldb.a r12,[r1,1]
- .Lnox1:
- lppnz .Lendbloop
- ldb_s r3,[r1,1]
- stb.ab r12,[r5,1]
- ldb.a r12,[r1,2]
- stb.ab r3,[r5,1]
- .Lendbloop:
- j_s.d [blink]
- stb r12,[r5,0]
- END(memcpy)
- libc_hidden_def(memcpy)
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