diff options
Diffstat (limited to 'REORG.TODO/sysdeps/x86_64/nptl/pthread_spin_lock.S')
| -rw-r--r-- | REORG.TODO/sysdeps/x86_64/nptl/pthread_spin_lock.S | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/x86_64/nptl/pthread_spin_lock.S b/REORG.TODO/sysdeps/x86_64/nptl/pthread_spin_lock.S new file mode 100644 index 0000000000..36ba181d9b --- /dev/null +++ b/REORG.TODO/sysdeps/x86_64/nptl/pthread_spin_lock.S @@ -0,0 +1,34 @@ +/* Copyright (C) 2012-2017 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/>. */ + +#include <lowlevellock.h> +#include <sysdep.h> + +ENTRY(pthread_spin_lock) +1: LOCK + decl 0(%rdi) + jne 2f + xor %eax, %eax + ret + + .align 16 +2: rep + nop + cmpl $0, 0(%rdi) + jg 1b + jmp 2b +END(pthread_spin_lock) |