diff options
Diffstat (limited to 'libc/sysdeps/i386/i486/bits/atomic.h')
| -rw-r--r-- | libc/sysdeps/i386/i486/bits/atomic.h | 36 |
1 files changed, 4 insertions, 32 deletions
diff --git a/libc/sysdeps/i386/i486/bits/atomic.h b/libc/sysdeps/i386/i486/bits/atomic.h index b633ce984..b59a556db 100644 --- a/libc/sysdeps/i386/i486/bits/atomic.h +++ b/libc/sysdeps/i386/i486/bits/atomic.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2002-2004,2006,2007,2009,2011 Free Software Foundation, Inc. +/* Copyright (C) 2002-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -55,33 +55,10 @@ typedef uintmax_t uatomic_max_t; #endif -#if __GNUC_PREREQ (4, 1) -# define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ +#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ __sync_val_compare_and_swap (mem, oldval, newval) -# define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ +#define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ (! __sync_bool_compare_and_swap (mem, oldval, newval)) -#else -# define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ - ({ __typeof (*mem) ret; \ - __asm __volatile (LOCK_PREFIX "cmpxchgb %b2, %1" \ - : "=a" (ret), "=m" (*mem) \ - : "q" (newval), "m" (*mem), "0" (oldval)); \ - ret; }) - -# define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ - ({ __typeof (*mem) ret; \ - __asm __volatile (LOCK_PREFIX "cmpxchgw %w2, %1" \ - : "=a" (ret), "=m" (*mem) \ - : "r" (newval), "m" (*mem), "0" (oldval)); \ - ret; }) - -# define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ - ({ __typeof (*mem) ret; \ - __asm __volatile (LOCK_PREFIX "cmpxchgl %2, %1" \ - : "=a" (ret), "=m" (*mem) \ - : "r" (newval), "m" (*mem), "0" (oldval)); \ - ret; }) -#endif #define __arch_c_compare_and_exchange_val_8_acq(mem, newval, oldval) \ @@ -254,13 +231,8 @@ typedef uintmax_t uatomic_max_t; } \ __result; }) -#if __GNUC_PREREQ (4, 1) -# define atomic_exchange_and_add(mem, value) \ +#define atomic_exchange_and_add(mem, value) \ __sync_fetch_and_add (mem, value) -#else -# define atomic_exchange_and_add(mem, value) \ - __arch_exchange_and_add_body (LOCK_PREFIX, __arch, mem, value) -#endif #define __arch_exchange_and_add_cprefix \ "cmpl $0, %%gs:%P4\n\tje 0f\n\tlock\n0:\t" |