Merge commit 'upstream/2.20'

[msp430-binutils.git] / gold / ffsll.c

diff --git a/gold/ffsll.c b/gold/ffsll.c
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+++ b/gold/ffsll.c
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+/* ffsll.c -- version of ffsll for gold.  */
+
+/* Copyright 2009 Free Software Foundation, Inc.
+   Written by Ian Lance Taylor <iant@google.com>.
+
+   This file is part of gold.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "config.h"
+
+#include <string.h>
+
+extern int ffsll (long long);
+
+/* This file implements ffsll for systems which don't have it.  We use
+   ffsll if possible because gcc supports it as a builtin which will
+   use a machine instruction if there is one.  */
+
+int
+ffsll (long long arg)
+{
+  unsigned long long i;
+  int ret;
+
+  if (arg == 0)
+    ret = 0;
+  else
+    {
+      ret = 1;
+      for (i = (unsigned long long) arg; (i & 1) == 0; i >>= 1)
+       ++ret;
+    }
+  return ret;
+}