diff options
Diffstat (limited to 'REORG.TODO/sysdeps/sh/strlen.S')
| -rw-r--r-- | REORG.TODO/sysdeps/sh/strlen.S | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/sh/strlen.S b/REORG.TODO/sysdeps/sh/strlen.S new file mode 100644 index 0000000000..8e0d53c471 --- /dev/null +++ b/REORG.TODO/sysdeps/sh/strlen.S @@ -0,0 +1,83 @@ +/* Copyright (C) 1999-2017 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 Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +/* size_t strlen (const char *s) */ + +ENTRY(strlen) + mov r4, r0 + and #3, r0 + tst r0, r0 + bt/s 1f + mov #0, r2 + + add #-1, r0 + shll2 r0 + shll r0 + braf r0 + nop + + mov.b @r4+, r1 + tst r1, r1 + bt 8f + add #1, r2 + + mov.b @r4+, r1 + tst r1, r1 + bt 8f + add #1, r2 + + mov.b @r4+, r1 + tst r1, r1 + bt 8f + add #1, r2 + +1: + mov #0, r3 +2: + mov.l @r4+, r1 + cmp/str r3, r1 + bf/s 2b + add #4, r2 + + add #-4, r2 +#ifdef __BIG_ENDIAN__ + swap.b r1, r1 + swap.w r1, r1 + swap.b r1, r1 +#endif + extu.b r1, r0 + tst r0, r0 + bt/s 8f + shlr8 r1 + add #1, r2 + extu.b r1, r0 + tst r0, r0 + bt/s 8f + shlr8 r1 + add #1, r2 + extu.b r1, r0 + tst r0, r0 + bt 8f + add #1, r2 +8: + rts + mov r2, r0 +END(strlen) +libc_hidden_builtin_def (strlen) |