diff options
Diffstat (limited to 'ports/sysdeps/alpha/alphaev67/ffs.S')
| -rw-r--r-- | ports/sysdeps/alpha/alphaev67/ffs.S | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/ports/sysdeps/alpha/alphaev67/ffs.S b/ports/sysdeps/alpha/alphaev67/ffs.S new file mode 100644 index 0000000000..36215485b8 --- /dev/null +++ b/ports/sysdeps/alpha/alphaev67/ffs.S @@ -0,0 +1,50 @@ +/* Copyright (C) 2000, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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/>. */ + +/* Finds the first bit set in an integer. */ + +#include <sysdep.h> + + .arch ev6 + .set noreorder + .set noat + + +ENTRY(__ffs) +#ifdef PROF + ldgp gp, 0(pv) + lda AT, _mcount + jsr AT, (AT), _mcount + .prologue 1 +#else + .prologue 0 +#endif + + zap $16, 0xF0, $16 + cttz $16, $0 + addq $0, 1, $0 + cmoveq $16, 0, $0 + + nop + nop + nop + ret + +END(__ffs) + +weak_alias (__ffs, ffs) +libc_hidden_builtin_def (ffs) |