diff options
Diffstat (limited to 'libc/sysdeps/linux/arc/bits/atomic.h')
| -rw-r--r-- | libc/sysdeps/linux/arc/bits/atomic.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arc/bits/atomic.h b/libc/sysdeps/linux/arc/bits/atomic.h new file mode 100644 index 000000000..d4abf4eb7 --- /dev/null +++ b/libc/sysdeps/linux/arc/bits/atomic.h @@ -0,0 +1,57 @@ +/* + * Copyright (C) 2013 Synopsys, Inc. (www.synopsys.com) + * + * Licensed under LGPL v2.1 or later, see the file COPYING.LIB in this tarball. + */ + +#include <stdint.h> +#include <sysdep.h> + +typedef int8_t atomic8_t; +typedef uint8_t uatomic8_t; +typedef int_fast8_t atomic_fast8_t; +typedef uint_fast8_t uatomic_fast8_t; + +typedef int32_t atomic32_t; +typedef uint32_t uatomic32_t; +typedef int_fast32_t atomic_fast32_t; +typedef uint_fast32_t uatomic_fast32_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + +void __arc_link_error (void); + +#define atomic_full_barrier() \ + __asm__ __volatile__("": : :"memory") + +/* Atomic compare and exchange. */ + +#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ + ({ __arc_link_error (); oldval; }) + +#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ + ({ __arc_link_error (); oldval; }) + +#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ + ({ \ + __typeof(oldval) prev; \ + \ + __asm__ __volatile__( \ + "1: llock %0, [%1] \n" \ + " brne %0, %2, 2f \n" \ + " scond %3, [%1] \n" \ + " bnz 1b \n" \ + "2: \n" \ + : "=&r"(prev) \ + : "r"(mem), "ir"(oldval), \ + "r"(newval) /* can't be "ir". scond can't take limm for "b" */\ + : "cc", "memory"); \ + \ + prev; \ + }) + +#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ + ({ __arc_link_error (); oldval; }) |