diff options
Diffstat (limited to 'arch/arc/lib/memcpy-700.S')
| -rw-r--r-- | arch/arc/lib/memcpy-700.S | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/arch/arc/lib/memcpy-700.S b/arch/arc/lib/memcpy-700.S new file mode 100644 index 0000000..51dd73a --- /dev/null +++ b/arch/arc/lib/memcpy-700.S @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +.global memcpy +.align 4 +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] |