* Some recent versions of GCC try very hard to make it impossible to

use ebx in inline assembly.  For the beta, just don't inline the 64
bit atomic compare and swap on IA32 (cmpxchg8 requires use of ebx).
Any caller of the function will fall back to the non-inline version.

This commit was SVN r5957.

Author: Brian Barrett

src/include/sys/ia32/atomic.h

@@ -102,6 +102,12 @@ static inline int ompi_atomic_cmpset_32(volatile int32_t *addr,
 
 #if OMPI_GCC_INLINE_ASSEMBLY
 
+#if 0
+
+/* some versions of GCC won't let you use ebx period (even though they
+   should be able to save / restore for the life of the inline
+   assembly).  For the beta, just use the non-inline version */
+
 #ifndef ll_low /* GLIBC provides these somewhere, so protect */
 #define ll_low(x)       *(((unsigned int*)&(x))+0)
 #define ll_high(x)      *(((unsigned int*)&(x))+1)
@@ -135,6 +141,7 @@ static inline int ompi_atomic_cmpset_64(volatile int64_t *addr,
 		    : "cc", "memory", "ebx");
     return (int) ret;
 }
+#endif /* if 0 */
 
 #endif /* OMPI_GCC_INLINE_ASSEMBLY */