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| author | Ulrich Drepper <drepper@redhat.com> | 2003-03-20 10:18:24 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2003-03-20 10:18:24 +0000 |
| commit | f79466a8e909930237d882da8916bbbb1401edf6 (patch) | |
| tree | 460afefe452e8550b56d9a01d90dc129012dfd27 /sysdeps/powerpc/bits | |
| parent | 5132931e18d50a1caf7399aa46dafd0142a7c7ae (diff) | |
| download | glibc-f79466a8e909930237d882da8916bbbb1401edf6.zip glibc-f79466a8e909930237d882da8916bbbb1401edf6.tar.gz glibc-f79466a8e909930237d882da8916bbbb1401edf6.tar.bz2 | |
Update.
2003-03-20 Ulrich Drepper <drepper@redhat.com>
* include/atomic.h: Define atomic_exchange and
atomic_decrement_if_positive if not already defined. Add some
__builtin_expect.
* sysdeps/i386/i486/bits/atomic.h: Define atomic_exchange.
* sysdeps/x86_64/bits/atomic.h: Likewise.
* sysdeps/ia64/bits/atomic.h: Pretty printing. Define atomic_exchange.
* sysdeps/powerpc/bits/atomic.h: Pretty printing. Define
atomic_exchange, atomic_exchange_and_add, and
atomic_decrement_if_positive
Diffstat (limited to 'sysdeps/powerpc/bits')
| -rw-r--r-- | sysdeps/powerpc/bits/atomic.h | 66 |
1 files changed, 58 insertions, 8 deletions
diff --git a/sysdeps/powerpc/bits/atomic.h b/sysdeps/powerpc/bits/atomic.h index af61563..13001cb 100644 --- a/sysdeps/powerpc/bits/atomic.h +++ b/sysdeps/powerpc/bits/atomic.h @@ -53,11 +53,11 @@ typedef uintmax_t uatomic_max_t; (abort (), 0) #ifdef UP -#define __ARCH_ACQ_INSTR "" -#define __ARCH_REL_INSTR "" +# define __ARCH_ACQ_INSTR "" +# define __ARCH_REL_INSTR "" #else -#define __ARCH_ACQ_INSTR "isync" -#define __ARCH_REL_INSTR "sync" +# define __ARCH_ACQ_INSTR "isync" +# define __ARCH_REL_INSTR "sync" #endif /* @@ -86,7 +86,7 @@ typedef uintmax_t uatomic_max_t; }) #ifdef __powerpc64__ -#define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \ +# define __arch_compare_and_exchange_64_acq(mem, newval, oldval)\ ({ \ unsigned long __tmp; \ __asm __volatile (__ARCH_REL_INSTR "\n" \ @@ -103,14 +103,64 @@ typedef uintmax_t uatomic_max_t; }) #else /* powerpc32 */ -#define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \ +# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \ (abort (), 0) #endif + +#define atomic_exchange(mem, value) \ + ({ if (sizeof (*mem) != 4) \ + abort (); \ + int __val, __tmp; \ + __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", "memory"); \ + __val; }) + + +#define atomic_exchange_and_add(mem, value) \ + ({ if (sizeof (*mem) != 4) \ + 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; \ + }) + + +/* Decrement *MEM if it is > 0, and return the old value. */ +#define atomic_decrement_if_positive(mem) \ + ({ if (sizeof (*mem) != 4) \ + abort (); \ + int __val, __tmp; \ + __asm __volatile ("1: lwarx %0,0,%3\n" \ + " cmpwi 0,%0,0\n" \ + " addi %1,%0,-1\n" \ + " ble 2f\n" \ + " stwcx. %1,0,%3\n" \ + " bne- 1b\n" \ + "2: " __ARCH_ACQ_INSTR \ + : "=&b" (__val), "=&r" (__tmp), "=m" (*mem) \ + : "r" (mem), "2" (*mem) \ + : "cr0"); \ + __val; \ + }) + + + #define atomic_full_barrier() __asm ("sync" ::: "memory") #ifdef __powerpc64__ -#define atomic_read_barrier() __asm ("lwsync" ::: "memory") +# define atomic_read_barrier() __asm ("lwsync" ::: "memory") #else -#define atomic_read_barrier() __asm ("sync" ::: "memory") +# define atomic_read_barrier() __asm ("sync" ::: "memory") #endif #define atomic_write_barrier() __asm ("eieio" ::: "memory") |