memcmp implementation for x86-64 using SSE2.
[glibc.git] / string / ffsll.c
blob9dd269afb732a7eae64bce0f352646793e86cf58
1 /* Copyright (C) 1991, 1992, 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Torbjorn Granlund (tege@sics.se).
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
20 #include <limits.h>
21 #define ffsl __something_else
22 #include <string.h>
24 #undef ffsll
26 /* Find the first bit set in I. */
27 int
28 ffsll (i)
29 long long int i;
31 unsigned long long int x = i & -i;
33 if (x <= 0xffffffff)
34 return ffs (i);
35 else
36 return 32 + ffs (i >> 32);
39 #if ULONG_MAX != UINT_MAX
40 #undef ffsl
41 weak_alias (ffsll, ffsl)
42 #endif