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-rw-r--r--libc/string/ffsll.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/libc/string/ffsll.c b/libc/string/ffsll.c
new file mode 100644
index 000000000..a7662900b
--- /dev/null
+++ b/libc/string/ffsll.c
@@ -0,0 +1,36 @@
+/* Copyright (C) 1991, 1992, 1997, 1998 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <limits.h>
+#include <string.h>
+
+/* Find the first bit set in I. */
+int ffsll (long long int i)
+{
+ unsigned long long int x = i & -i;
+
+ if (x <= 0xffffffff)
+ return ffs (i);
+ else
+ return 32 + ffs (i >> 32);
+}
+
+#if ULONG_MAX != UINT_MAX
+strong_alias_untyped(ffsll, ffsl)
+#endif