summaryrefslogtreecommitdiff
path: root/ports/sysdeps/m68k/ffs.c
diff options
context:
space:
mode:
authorJoseph Myers <joseph@codesourcery.com>2012-07-01 13:06:41 +0000
committerJoseph Myers <joseph@codesourcery.com>2012-07-01 13:06:41 +0000
commite64ac02c24b43659048622714afdc92fedf561fa (patch)
tree37162878b72d302de351788bec4c9360c9d55f1d /ports/sysdeps/m68k/ffs.c
parenta20c2b3c87aebc7d4b090c622d36480263b80042 (diff)
downloadglibc-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.c47
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