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author | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:06:41 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2012-07-01 13:06:41 +0000 |
commit | e64ac02c24b43659048622714afdc92fedf561fa (patch) | |
tree | 37162878b72d302de351788bec4c9360c9d55f1d /ports/sysdeps/m68k/ffs.c | |
parent | a20c2b3c87aebc7d4b090c622d36480263b80042 (diff) | |
download | glibc-e64ac02c24b43659048622714afdc92fedf561fa.tar.gz |
Move all files into ports/ subdirectory in preparation for merge with glibcglibc-2.16-ports-before-merge
Diffstat (limited to 'ports/sysdeps/m68k/ffs.c')
-rw-r--r-- | ports/sysdeps/m68k/ffs.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/ports/sysdeps/m68k/ffs.c b/ports/sysdeps/m68k/ffs.c new file mode 100644 index 0000000000..3f45a03eaf --- /dev/null +++ b/ports/sysdeps/m68k/ffs.c @@ -0,0 +1,47 @@ +/* ffs -- find first set bit in a word, counted from least significant end. + For mc68020, mc68030, mc68040. + This file is part of the GNU C Library. + Copyright (C) 1991, 1992, 1997, 1998, 2004, 2005 Free Software Foundation, Inc. + Contributed by Torbjorn Granlund (tege@sics.se). + + 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/>. */ + +#define ffsl __something_else +#include <string.h> + +#undef ffs + +#if defined (__GNUC__) && defined (__mc68020__) + +int +__ffs (x) + int x; +{ + int cnt; + + asm ("bfffo %1{#0:#0},%0" : "=d" (cnt) : "dm" (x & -x)); + + return 32 - cnt; +} +weak_alias (__ffs, ffs) +libc_hidden_builtin_def (ffs) +#undef ffsl +weak_alias (__ffs, ffsl) + +#else + +#include <string/ffs.c> + +#endif |