path: root/tcg-runtime.c
diff options
authorRichard Henderson <rth@twiddle.net>2016-06-29 21:10:59 -0700
committerRichard Henderson <rth@twiddle.net>2016-10-26 08:29:01 -0700
commit7ebee43ee3e2fcd7b5063058b7ef74bc43216733 (patch)
tree366db1d66ff70d8332b6fb38b07085a0f79c6293 /tcg-runtime.c
parentc482cb117cc418115ca9c6d21a7a2315414c0a40 (diff)
tcg: Add atomic128 helpers
Force the use of cmpxchg16b on x86_64. Wikipedia suggests that only very old AMD64 (circa 2004) did not have this instruction. Further, it's required by Windows 8 so no new cpus will ever omit it. If we truely care about these, then we could check this at startup time and then avoid executing paths that use it. Reviewed-by: Emilio G. Cota <cota@braap.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg-runtime.c')
1 files changed, 18 insertions, 0 deletions
diff --git a/tcg-runtime.c b/tcg-runtime.c
index aa55d12e12..e9521531cd 100644
--- a/tcg-runtime.c
+++ b/tcg-runtime.c
@@ -133,4 +133,22 @@ static void *atomic_mmu_lookup(CPUArchState *env, target_ulong addr,
#define DATA_SIZE 8
#include "atomic_template.h"
+/* The following is only callable from other helpers, and matches up
+ with the softmmu version. */
+#ifdef CONFIG_ATOMIC128
+#undef EXTRA_ARGS
+#define EXTRA_ARGS , TCGMemOpIdx oi, uintptr_t retaddr
+#define ATOMIC_NAME(X) \
+ HELPER(glue(glue(glue(atomic_ ## X, SUFFIX), END), _mmu))
+#define ATOMIC_MMU_LOOKUP atomic_mmu_lookup(env, addr, DATA_SIZE, retaddr)
+#define DATA_SIZE 16
+#include "atomic_template.h"
+#endif /* CONFIG_ATOMIC128 */
#endif /* !CONFIG_SOFTMMU */