diff options
Diffstat (limited to 'REORG.TODO/sysdeps/tile/tilegx/strlen.c')
-rw-r--r-- | REORG.TODO/sysdeps/tile/tilegx/strlen.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/tile/tilegx/strlen.c b/REORG.TODO/sysdeps/tile/tilegx/strlen.c new file mode 100644 index 0000000000..5cd04acc59 --- /dev/null +++ b/REORG.TODO/sysdeps/tile/tilegx/strlen.c @@ -0,0 +1,39 @@ +/* Copyright (C) 2011-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. + + 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 <string.h> +#include <stdint.h> +#include "string-endian.h" + +size_t +strlen (const char *s) +{ + /* Get an aligned pointer. */ + const uintptr_t s_int = (uintptr_t) s; + const uint64_t *p = (const uint64_t *) (s_int & -8); + + /* Read and MASK the first word. */ + uint64_t v = *p | MASK (s_int); + + uint64_t bits; + while ((bits = __insn_v1cmpeqi (v, 0)) == 0) + v = *++p; + + return ((const char *) p) + (CFZ (bits) >> 3) - s; +} +libc_hidden_builtin_def (strlen) |