diff options
Diffstat (limited to 'sysdeps/sh/memset.S')
| -rw-r--r-- | sysdeps/sh/memset.S | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/sysdeps/sh/memset.S b/sysdeps/sh/memset.S new file mode 100644 index 0000000000..a44a8f7edd --- /dev/null +++ b/sysdeps/sh/memset.S @@ -0,0 +1,79 @@ +/* Copyright (C) 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Kazumoto Kojima <kkojima@rr.iij4u.or.jp> + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <sysdep.h> + +/* void *memset (t, c, len) */ + +ENTRY(memset) + tst r6, r6 + bt/s end + mov r4, r3 + mov #3, r0 + cmp/hs r6, r0 + bt/s 2f + and r4, r0 + tst r0, r0 + bt/s 1f + add r0, r6 + add #-1, r0 + shll2 r0 + braf r0 + add #-4, r6 + + mov.b r5, @r4 + add #1, r4 + mov.b r5, @r4 + add #1, r4 + mov.b r5, @r4 + add #1, r4 +1: + extu.b r5, r0 + shll8 r5 + or r5, r0 + extu.w r0, r0 + mov r0, r5 + swap.w r5, r5 + or r0, r5 + +2: + add #-4, r6 + cmp/pz r6 + bf afew + mov.l r5, @r4 + bra 2b + add #4, r4 + +afew: + mov #-1, r0 + sub r6, r0 + shll2 r0 + braf r0 + nop + + mov.b r5, @r4 + add #1, r4 + mov.b r5, @r4 + add #1, r4 + mov.b r5, @r4 + add #1, r4 +end: + rts + mov r3, r0 +END(memset) |