From 73588a7223bec40d652fd4c75f1cb4772c5d2612 Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Mon, 10 Feb 2014 20:05:01 +0100 Subject: Move m68k from ports to libc --- sysdeps/m68k/ffs.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 sysdeps/m68k/ffs.c (limited to 'sysdeps/m68k/ffs.c') diff --git a/sysdeps/m68k/ffs.c b/sysdeps/m68k/ffs.c new file mode 100644 index 0000000000..633c0012cb --- /dev/null +++ b/sysdeps/m68k/ffs.c @@ -0,0 +1,48 @@ +/* ffs -- find first set bit in a word, counted from least significant end. + For mc68020, mc68030, mc68040. + This file is part of the GNU C Library. + Copyright (C) 1991-2014 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 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 + . */ + +#define ffsl __something_else +#include + +#undef ffs + +#if defined (__GNUC__) && defined (__mc68020__) + +int +__ffs (x) + int x; +{ + int cnt; + + asm ("bfffo %1{#0:#0},%0" : "=d" (cnt) : "dm" (x & -x)); + + return 32 - cnt; +} +weak_alias (__ffs, ffs) +libc_hidden_def (__ffs) +libc_hidden_builtin_def (ffs) +#undef ffsl +weak_alias (__ffs, ffsl) + +#else + +#include + +#endif -- cgit 1.4.1