diff options
Diffstat (limited to 'sysdeps/x86_64/bits/atomic.h')
| -rw-r--r-- | sysdeps/x86_64/bits/atomic.h | 44 |
1 files changed, 4 insertions, 40 deletions
diff --git a/sysdeps/x86_64/bits/atomic.h b/sysdeps/x86_64/bits/atomic.h index 4a0d40b34c..4b8d2ab095 100644 --- a/sysdeps/x86_64/bits/atomic.h +++ b/sysdeps/x86_64/bits/atomic.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2002-2004, 2006, 2007, 2009 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. @@ -55,41 +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; }) - -# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ - ({ __typeof (*mem) ret; \ - __asm __volatile (LOCK_PREFIX "cmpxchgq %q2, %1" \ - : "=a" (ret), "=m" (*mem) \ - : "r" ((long int) (newval)), "m" (*mem), \ - "0" ((long int) (oldval))); \ - ret; }) -#endif #define __arch_c_compare_and_exchange_val_8_acq(mem, newval, oldval) \ @@ -184,13 +153,8 @@ typedef uintmax_t uatomic_max_t; "i" (offsetof (tcbhead_t, multiple_threads))); \ 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, mem, value) -#endif #define __arch_exchange_and_add_cprefix \ "cmpl $0, %%fs:%P4\n\tje 0f\n\tlock\n0:\t" |