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| author | Roland McGrath <roland@gnu.org> | 2003-03-25 22:40:21 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2003-03-25 22:40:21 +0000 |
| commit | 3e195d9371956446c8182af812723300010f0bb8 (patch) | |
| tree | 90c76aae8c7a804f8533385a7cc04b70649b4de2 /sysdeps | |
| parent | bacb02966f9e992d923ea988bb11c51ab297b10c (diff) | |
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2003-03-25 Roland McGrath <roland@redhat.com>
* sysdeps/powerpc/bits/atomic.h (__arch_atomic_exchange_32): New macro.
(__arch_atomic_exchange_64): New macro.
(atomic_exchange): Use them.
(__arch_atomic_exchange_and_add_32): New macro.
(__arch_atomic_exchange_and_add_64): New macro.
(atomic_exchange_and_add): Use them.
Original patch from Steven Munroe <sjmunroe@us.ibm.com>.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/powerpc/bits/atomic.h | 99 |
1 files changed, 75 insertions, 24 deletions
diff --git a/sysdeps/powerpc/bits/atomic.h b/sysdeps/powerpc/bits/atomic.h index 49f1c14b9d..e0f2bd4881 100644 --- a/sysdeps/powerpc/bits/atomic.h +++ b/sysdeps/powerpc/bits/atomic.h @@ -102,38 +102,90 @@ typedef uintmax_t uatomic_max_t; __tmp != 0; \ }) +# define __arch_atomic_exchange_64(mem, value) \ + ({ \ + __typeof (*mem) __val; \ + __asm __volatile (__ARCH_REL_INSTR "\n" \ + "1: ldarx %0,0,%2\n" \ + " stdcx. %3,0,%2\n" \ + " bne- 1b" \ + : "=&r" (__val), "=m" (*mem) \ + : "r" (mem), "r" (value), "1" (*mem) \ + : "cr0"); \ + __val; \ + }) + +# define __arch_atomic_exchange_and_add_64(mem, value) \ + ({ \ + __typeof (*mem) __val, __tmp; \ + __asm __volatile ("1: ldarx %0,0,%3\n" \ + " addi %1,%0,%4\n" \ + " stdcx. %1,0,%3\n" \ + " bne- 1b" \ + : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ + : "r" (mem), "I" (value), "2" (*mem) \ + : "cr0"); \ + __val; \ + }) + #else /* powerpc32 */ # define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \ (abort (), 0) + +# define __arch_atomic_exchange_64(mem, value) \ + ({ abort (); (*mem) = (value); }) +# define __arch_atomic_exchange_and_add_64(mem, value) \ + ({ abort (); (*mem) = (value); }) #endif +#define __arch_atomic_exchange_32(mem, value) \ + ({ \ + __typeof (*mem) __val; \ + __asm __volatile (__ARCH_REL_INSTR "\n" \ + "1: lwarx %0,0,%2\n" \ + " stwcx. %3,0,%2\n" \ + " bne- 1b" \ + : "=&r" (__val), "=m" (*mem) \ + : "r" (mem), "r" (value), "1" (*mem) \ + : "cr0"); \ + __val; \ + }) -#define atomic_exchange(mem, value) \ - ({ if (sizeof (*mem) != 4) \ - abort (); \ - int __val; \ - __asm __volatile (__ARCH_REL_INSTR "\n" \ - "1: lwarx %0,0,%2\n" \ - " stwcx. %3,0,%2\n" \ - " bne- 1b" \ - : "=&r" (__val), "=m" (*mem) \ - : "r" (mem), "r" (value), "1" (*mem) \ - : "cr0"); \ - __val; }) +#define __arch_atomic_exchange_and_add_32(mem, value) \ + ({ \ + __typeof (*mem) __val, __tmp; \ + __asm __volatile ("1: lwarx %0,0,%3\n" \ + " addi %1,%0,%4\n" \ + " stwcx. %1,0,%3\n" \ + " bne- 1b" \ + : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ + : "r" (mem), "I" (value), "2" (*mem) \ + : "cr0"); \ + __val; \ + }) +#define atomic_exchange(mem, value) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_atomic_exchange_32 ((mem), (value)); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_atomic_exchange_64 ((mem), (value)); \ + else \ + abort (); \ + __result; \ + }) -#define atomic_exchange_and_add(mem, value) \ - ({ if (sizeof (*mem) != 4) \ +#define atomic_exchange_and_add(mem, value) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*mem) == 4) \ + __result = __arch_atomic_exchange_and_add_32 ((mem), (value)); \ + else if (sizeof (*mem) == 8) \ + __result = __arch_atomic_exchange_and_add_64 ((mem), (value)); \ + else \ abort (); \ - int __val, __tmp; \ - __asm __volatile ("1: lwarx %0,0,%3\n" \ - " addi %1,%0,%4\n" \ - " stwcx. %1,0,%3\n" \ - " bne- 1b" \ - : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ - : "r" (mem), "I" (value), "2" (*mem) \ - : "cr0"); \ - __val; \ + __result; \ }) @@ -156,7 +208,6 @@ typedef uintmax_t uatomic_max_t; }) - #define atomic_full_barrier() __asm ("sync" ::: "memory") #ifdef __powerpc64__ # define atomic_read_barrier() __asm ("lwsync" ::: "memory") |