diff options
| author | Joern Rennecke <joern.rennecke@embecosm.com> | 2013-12-13 14:49:24 +0530 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2013-12-20 14:38:23 +0100 |
| commit | 1ce639990b6340a8b9f18d076c427fcf5a93695e (patch) | |
| tree | 48f97b612dd4e8b085127a808e4774333903c38f /libc/string/arc/memset.S | |
| parent | 374db5d1748fe23d8203479c29ecff2b22fca95c (diff) | |
string: Add ARC support
Signed-off-by: Joern Rennecke <joern.rennecke@embecosm.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/string/arc/memset.S')
| -rw-r--r-- | libc/string/arc/memset.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/libc/string/arc/memset.S b/libc/string/arc/memset.S new file mode 100644 index 000000000..f4048455a --- /dev/null +++ b/libc/string/arc/memset.S @@ -0,0 +1,51 @@ +/* + * 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> + +#define SMALL 7 /* Must be at least 6 to deal with alignment/loop issues. */ + +ENTRY(memset) + + mov_s r4,r0 + or r12,r0,r2 + bmsk.f r12,r12,1 + extb_s r1,r1 + asl r3,r1,8 + beq.d .Laligned + or_s r1,r1,r3 + brls r2,SMALL,.Ltiny + add r3,r2,r0 + stb r1,[r3,-1] + bclr_s r3,r3,0 + stw r1,[r3,-2] + bmsk.f r12,r0,1 + add_s r2,r2,r12 + sub.ne r2,r2,4 + stb.ab r1,[r4,1] + and r4,r4,-2 + stw.ab r1,[r4,2] + and r4,r4,-4 +.Laligned: ; This code address should be aligned for speed. + asl r3,r1,16 + lsr.f lp_count,r2,2 + or_s r1,r1,r3 + lpne .Loop_end + st.ab r1,[r4,4] +.Loop_end: + j_s [blink] + + + .balign 4 +.Ltiny: + mov.f lp_count,r2 + lpne .Ltiny_end + stb.ab r1,[r4,1] +.Ltiny_end: + j_s [blink] +END(memset) +libc_hidden_def(memset) |