1 files changed, 42 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/x86_64/ffsll.c b/REORG.TODO/sysdeps/x86_64/ffsll.c
new file mode 100644
index 0000000000..47111ce61b
--- /dev/null
+++ b/REORG.TODO/sysdeps/x86_64/ffsll.c
@@ -0,0 +1,42 @@
+/* ffsll -- find first set bit in a word, counted from least significant end.
+   For AMD x86-64.
+   This file is part of the GNU C Library.
+   Copyright (C) 1991-2017 Free Software Foundation, Inc.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>.
+
+   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	ffsll
+
+int
+ffsll (long long int x)
+{
+  long long int cnt;
+  long long int tmp;
+
+  asm ("bsfq %2,%0\n"		/* Count low bits in X and store in %1.  */
+       "cmoveq %1,%0\n"		/* If number was zero, use -1 as result.  */
+       : "=&r" (cnt), "=r" (tmp) : "rm" (x), "1" (-1));
+
+  return cnt + 1;
+}
+
+#ifndef __ILP32__
+#undef	ffsl
+weak_alias (ffsll, ffsl)
+#endif