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-rw-r--r--sysdeps/powerpc/ffs.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/sysdeps/powerpc/ffs.c b/sysdeps/powerpc/ffs.c
new file mode 100644
index 0000000000..d9d7f267af
--- /dev/null
+++ b/sysdeps/powerpc/ffs.c
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+/* Find first set bit in a word, counted from least significant end.
+ For PowerPC.
+ Copyright (C) 1991, 1992, 1997 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 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 <bstring.h>
+
+#undef ffs
+
+#ifdef __GNUC__
+
+int
+ffs (int x)
+{
+ int cnt;
+
+ asm ("cntlzw %0,%1" : "=r" (cnt) : "r" (x & -x));
+ return 32 - cnt;
+}
+
+#else
+#include <sysdeps/generic/ffs.c>
+#endif