| --- src/atomic_ops/sysdeps/gcc/powerpc.h.orig 2006-03-28 22:49:14.000000000 +0000 |
| +++ src/atomic_ops/sysdeps/gcc/powerpc.h 2007-06-08 23:10:07.000000000 +0000 |
| @@ -63,6 +63,8 @@ |
| /* seems to be that a data dependent branch followed by an isync is */ |
| /* cheaper. And the documentation is fairly explicit that this also */ |
| /* has acquire semantics. */ |
| +/* ppc64 uses ld not lwz */ |
| +#if defined(__powerpc64__) || defined(__ppc64__) || defined(__64BIT__) |
| AO_INLINE AO_t |
| AO_load_acquire(volatile AO_t *addr) |
| { |
| @@ -72,7 +74,7 @@ |
| /* registers. I always got "impossible constraint" when I */ |
| /* tried the "y" constraint. */ |
| __asm__ __volatile__ ( |
| - "lwz %0,%1\n" |
| + "ld %0,%1\n" |
| "cmpw cr7,%0,%0\n" |
| "bne- cr7,1f\n" |
| "1: isync\n" |
| @@ -80,7 +82,25 @@ |
| : "m"(*addr) : "memory", "cc"); |
| return result; |
| } |
| +#else |
| +AO_INLINE AO_t |
| +AO_load_acquire(volatile AO_t *addr) |
| +{ |
| + AO_t result; |
| |
| + /* FIXME: We should get gcc to allocate one of the condition */ |
| + /* registers. I always got "impossible constraint" when I */ |
| + /* tried the "y" constraint. */ |
| + __asm__ __volatile__ ( |
| + "lwz %0,%1\n" |
| + "cmpw cr7,%0,%0\n" |
| + "bne- cr7,1f\n" |
| + "1: isync\n" |
| + : "=r" (result) |
| + : "m"(*addr) : "memory", "cc"); |
| + return result; |
| +} |
| +#endif |
| #define AO_HAVE_load_acquire |
| |
| /* We explicitly specify store_release, since it relies */ |
