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| author | Paul Pluzhnikov <ppluzhnikov@google.com> | 2012-05-02 13:58:40 -0700 |
|---|---|---|
| committer | Paul Pluzhnikov <ppluzhnikov@google.com> | 2012-05-02 13:58:40 -0700 |
| commit | b93d565a5117afc5dde458438d5d16621b9c4dd4 (patch) | |
| tree | be796188dda31c1aadd08d24d5f254155e7e127e /nptl/sysdeps/i386 | |
| parent | 0be196addae0e464aa32fcccc9d679c2f83f01b4 (diff) | |
| download | glibc-b93d565a5117afc5dde458438d5d16621b9c4dd4.tar.gz | |
Avoid "anonymous" code in pthread_spin_lock.
Diffstat (limited to 'nptl/sysdeps/i386')
| -rw-r--r-- | nptl/sysdeps/i386/pthread_spin_lock.S (renamed from nptl/sysdeps/i386/pthread_spin_lock.c) | 53 |
1 files changed, 21 insertions, 32 deletions
diff --git a/nptl/sysdeps/i386/pthread_spin_lock.c b/nptl/sysdeps/i386/pthread_spin_lock.S index c059e0123a..ba9b18e492 100644 --- a/nptl/sysdeps/i386/pthread_spin_lock.c +++ b/nptl/sysdeps/i386/pthread_spin_lock.S @@ -1,6 +1,5 @@ -/* Copyright (C) 2002,2003,2004 Free Software Foundation, Inc. +/* Copyright (C) 2012 Free Software Foundation, Inc. This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public @@ -16,33 +15,23 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#include "pthreadP.h" - -#ifndef LOCK_PREFIX -# ifdef UP -# define LOCK_PREFIX /* nothing */ -# else -# define LOCK_PREFIX "lock;" -# endif -#endif - - -int -pthread_spin_lock (lock) - pthread_spinlock_t *lock; -{ - asm ("\n" - "1:\t" LOCK_PREFIX "decl %0\n\t" - "jne 2f\n\t" - ".subsection 1\n\t" - ".align 16\n" - "2:\trep; nop\n\t" - "cmpl $0, %0\n\t" - "jg 1b\n\t" - "jmp 2b\n\t" - ".previous" - : "=m" (*lock) - : "m" (*lock)); - - return 0; -} +#include <lowlevellock.h> + + .globl pthread_spin_lock + .type pthread_spin_lock,@function + .align 16 +pthread_spin_lock: + mov 4(%esp), %eax +1: LOCK + decl 0(%eax) + jne 2f + xor %eax, %eax + ret + + .align 16 +2: rep + nop + cmpl $0, 0(%eax) + jg 1b + jmp 2b + .size pthread_spin_lock,.-pthread_spin_lock |