diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2004-09-08 06:09:02 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2004-09-08 06:09:02 +0000 |
| commit | 7ba0e52c39ae2a57933a856ce363ab0361ad1ed9 (patch) | |
| tree | aaabd4f3d63a9a27d7c8f4fb1105bcc3c5ef26a2 /sysdeps/powerpc/bits/atomic.h | |
| parent | f510d815bec80c004b194aaf4847fa40069cfd18 (diff) | |
| download | glibc-7ba0e52c39ae2a57933a856ce363ab0361ad1ed9.tar.gz glibc-7ba0e52c39ae2a57933a856ce363ab0361ad1ed9.tar.xz glibc-7ba0e52c39ae2a57933a856ce363ab0361ad1ed9.zip | |
Update.
* sysdeps/powerpc/bits/atomic.h (atomic_increment): Define. (atomic_decrement): Define. * sysdeps/powerpc/bits/atomic.h: Implement atomic_increment_val and atomic_decrement_val. * sysdeps/powerpc/powerpc32/bits/atomic.h: Likewise. * sysdeps/powerpc/powerpc64/bits/atomic.h: Likewise. * csu/tst-atomic.c (do_test): Add tests of atomic_increment_val and atomic_decrement_val.
Diffstat (limited to 'sysdeps/powerpc/bits/atomic.h')
| -rw-r--r-- | sysdeps/powerpc/bits/atomic.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/sysdeps/powerpc/bits/atomic.h b/sysdeps/powerpc/bits/atomic.h index 4b6a761b72..31f27e9e10 100644 --- a/sysdeps/powerpc/bits/atomic.h +++ b/sysdeps/powerpc/bits/atomic.h @@ -147,6 +147,32 @@ typedef uintmax_t uatomic_max_t; __val; \ }) +#define __arch_atomic_increment_val_32(mem) \ + ({ \ + __typeof (*(mem)) __val; \ + __asm __volatile ("1: lwarx %0,0,%2\n" \ + " addi %0,%0,1\n" \ + " stwcx. %0,0,%2\n" \ + " bne- 1b" \ + : "=&b" (__val), "=m" (*mem) \ + : "b" (mem), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + +#define __arch_atomic_decrement_val_32(mem) \ + ({ \ + __typeof (*(mem)) __val; \ + __asm __volatile ("1: lwarx %0,0,%2\n" \ + " subi %0,%0,1\n" \ + " stwcx. %0,0,%2\n" \ + " bne- 1b" \ + : "=&b" (__val), "=m" (*mem) \ + : "b" (mem), "m" (*mem) \ + : "cr0", "memory"); \ + __val; \ + }) + #define __arch_atomic_decrement_if_positive_32(mem) \ ({ int __val, __tmp; \ __asm __volatile ("1: lwarx %0,0,%3\n" \ @@ -222,6 +248,34 @@ typedef uintmax_t uatomic_max_t; __result; \ }) +#define atomic_increment_val(mem) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*(mem)) == 4) \ + __result = __arch_atomic_increment_val_32 (mem); \ + else if (sizeof (*(mem)) == 8) \ + __result = __arch_atomic_increment_val_64 (mem); \ + else \ + abort (); \ + __result; \ + }) + +#define atomic_increment(mem) ({ atomic_increment_val (mem); (void) 0; }) + +#define atomic_decrement_val(mem) \ + ({ \ + __typeof (*(mem)) __result; \ + if (sizeof (*(mem)) == 4) \ + __result = __arch_atomic_decrement_val_32 (mem); \ + else if (sizeof (*(mem)) == 8) \ + __result = __arch_atomic_decrement_val_64 (mem); \ + else \ + abort (); \ + __result; \ + }) + +#define atomic_decrement(mem) ({ atomic_decrement_val (mem); (void) 0; }) + /* Decrement *MEM if it is > 0, and return the old value. */ #define atomic_decrement_if_positive(mem) \ |