+2006-11-18 Joseph Myers <joseph@codesourcery.com>
+
+ * config/rs6000/rs6000.h (TARGET_NO_LWSYNC): Define.
+ * config/rs6000/rs6000-c.c (rs6000_cpu_cpp_builtins): Define
+ __NO_LWSYNC__ if TARGET_NO_LWSYNC.
+ * config/rs6000/sync.md (lwsync): Emit plain sync if
+ TARGET_NO_LWSYNC.
+
2006-11-17 DJ Delorie <dj@redhat.com>
* reload1.c (reloads_unique_chain): New.
/* Used by lwarx/stwcx. errata work-around. */
if (rs6000_cpu == PROCESSOR_PPC405)
builtin_define ("__PPC405__");
+ /* Used by libstdc++. */
+ if (TARGET_NO_LWSYNC)
+ builtin_define ("__NO_LWSYNC__");
/* May be overridden by target configuration. */
RS6000_CPU_CPP_ENDIAN_BUILTINS();
#define TARGET_E500_SINGLE 0
#define TARGET_E500_DOUBLE 0
+/* E500 processors only support plain "sync", not lwsync. */
+#define TARGET_NO_LWSYNC TARGET_E500
+
/* Sometimes certain combinations of command options do not make sense
on a particular target machine. You can define a macro
`OVERRIDE_OPTIONS' to take account of this. This macro, if
[(set (mem:BLK (match_scratch 0 "X"))
(unspec_volatile:BLK [(mem:BLK (match_scratch 1 "X"))] UNSPEC_LWSYNC))]
""
- ".long 0x7c2004ac"
+{
+ if (TARGET_NO_LWSYNC)
+ return "sync";
+ else
+ return ".long 0x7c2004ac";
+}
[(set_attr "type" "sync")])
+2006-11-18 Joseph Myers <joseph@codesourcery.com>
+
+ * config/cpu/powerpc/atomic_word.h (_GLIBCXX_WRITE_MEM_BARRIER):
+ Use plain sync if __NO_LWSYNC__.
+
2006-11-14 Joseph Myers <joseph@codesourcery.com>
* testsuite/26_numerics/complex/13450.cc: Do not test long double
typedef int _Atomic_word;
#define _GLIBCXX_READ_MEM_BARRIER __asm __volatile ("isync":::"memory")
+#ifdef __NO_LWSYNC__
+#define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory")
+#else
#define _GLIBCXX_WRITE_MEM_BARRIER __asm __volatile ("lwsync":::"memory")
+#endif
#endif