[Qemu-devel] [RFC 04/30] target-i386: add cmpxchg helpers

["Emilio G. Cota" <cota@braap.org>]

Signed-off-by: Emilio G. Cota <cota@braap.org>
---
 target-i386/helper.h     |  4 ++++
 target-i386/mem_helper.c | 15 +++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/target-i386/helper.h b/target-i386/helper.h
index 1320edc..af84836 100644
--- a/target-i386/helper.h
+++ b/target-i386/helper.h
@@ -74,8 +74,12 @@ DEF_HELPER_3(boundw, void, env, tl, int)
 DEF_HELPER_3(boundl, void, env, tl, int)
 DEF_HELPER_1(rsm, void, env)
 DEF_HELPER_2(into, void, env, int)
+DEF_HELPER_4(cmpxchgb, tl, env, tl, tl, tl)
+DEF_HELPER_4(cmpxchgw, tl, env, tl, tl, tl)
+DEF_HELPER_4(cmpxchgl, tl, env, tl, tl, tl)
 DEF_HELPER_2(cmpxchg8b, void, env, tl)
 #ifdef TARGET_X86_64
+DEF_HELPER_4(cmpxchgq, tl, env, tl, tl, tl)
 DEF_HELPER_2(cmpxchg16b, void, env, tl)
 #endif
 DEF_HELPER_1(single_step, void, env)
diff --git a/target-i386/mem_helper.c b/target-i386/mem_helper.c
index c2f4769..3b17326 100644
--- a/target-i386/mem_helper.c
+++ b/target-i386/mem_helper.c
@@ -56,6 +56,21 @@ void helper_lock_init(void)
 }
 #endif
 
+#define GEN_CMPXCHG_HELPER(NAME)                                      \
+target_ulong glue(helper_, NAME)(CPUX86State *env, target_ulong addr, \
+                                 target_ulong old, target_ulong new)  \
+{                                                                     \
+    return glue(glue(cpu_, NAME), _data_ra)(env, addr, old, new, GETPC()); \
+}
+
+GEN_CMPXCHG_HELPER(cmpxchgb)
+GEN_CMPXCHG_HELPER(cmpxchgw)
+GEN_CMPXCHG_HELPER(cmpxchgl)
+#ifdef TARGET_X86_64
+GEN_CMPXCHG_HELPER(cmpxchgq)
+#endif
+#undef GEN_CMPXCHG_HELPER
+
 void helper_cmpxchg8b(CPUX86State *env, target_ulong a0)
 {
     uint64_t d;
-- 
2.5.0