diff options
Diffstat (limited to 'linuxthreads/sysdeps/powerpc')
| -rw-r--r-- | linuxthreads/sysdeps/powerpc/pt-machine.h | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/linuxthreads/sysdeps/powerpc/pt-machine.h b/linuxthreads/sysdeps/powerpc/pt-machine.h index c7d0670d82..c4af484e1b 100644 --- a/linuxthreads/sysdeps/powerpc/pt-machine.h +++ b/linuxthreads/sysdeps/powerpc/pt-machine.h @@ -1,6 +1,6 @@ /* Machine-dependent pthreads configuration and inline functions. powerpc version. - Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -26,8 +26,9 @@ #endif /* For multiprocessor systems, we want to ensure all memory accesses - are completed before we reset a lock. */ -#define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory") + are completed before we reset a lock. On other systems, we still + need to make sure that the compiler has flushed everything to memory. */ +#define MEMORY_BARRIER() __asm__ ("sync" : : : "memory") /* Get some notion of the current stack. Need not be exactly the top of the stack, just something somewhere in the current frame. */ @@ -48,17 +49,17 @@ __compare_and_swap (long int *p, long int oldval, long int newval) { int ret; - sync(); - __asm__ __volatile__( - "0: lwarx %0,0,%1 ;" - " xor. %0,%3,%0;" - " bne 1f;" - " stwcx. %2,0,%1;" - " bne- 0b;" - "1: " + MEMORY_BARRIER (); + __asm__ ( + "0: lwarx %0,0,%1 ;" + " xor. %0,%3,%0;" + " bne 1f;" + " stwcx. %2,0,%1;" + " bne- 0b;" + "1: " : "=&r"(ret) : "r"(p), "r"(newval), "r"(oldval) : "cr0", "memory"); - MEMORY_BARRIER(); + MEMORY_BARRIER (); return ret == 0; } |