[Qemu-devel] [RFC 23/30] target-arm: add atomic_xchg helper

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

Signed-off-by: Emilio G. Cota <cota@braap.org>
---
 target-arm/helper.c | 10 ++++++++++
 target-arm/helper.h |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/target-arm/helper.c b/target-arm/helper.c
index b38bfbd..adab296 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -9444,3 +9444,13 @@ uint32_t HELPER(cmpxchgq)(CPUARMState *env, uint32_t addr, uint64_t old,
     read = cpu_cmpxchgq_data_ra(env, addr, old, new, GETPC());
     return read != old;
 }
+
+uint32_t HELPER(atomic_xchgb)(CPUARMState *env, uint32_t addr, uint32_t val)
+{
+    return cpu_atomic_xchgb_data_ra(env, addr, val, GETPC());
+}
+
+uint32_t HELPER(atomic_xchgl)(CPUARMState *env, uint32_t addr, uint32_t val)
+{
+    return cpu_atomic_xchgl_data_ra(env, addr, val, GETPC());
+}
diff --git a/target-arm/helper.h b/target-arm/helper.h
index f3d6f26..7a36bb3 100644
--- a/target-arm/helper.h
+++ b/target-arm/helper.h
@@ -542,6 +542,9 @@ DEF_HELPER_4(cmpxchgw, i32, env, i32, i64, i32)
 DEF_HELPER_4(cmpxchgl, i32, env, i32, i64, i32)
 DEF_HELPER_5(cmpxchgq, i32, env, i32, i64, i32, i32)
 
+DEF_HELPER_3(atomic_xchgb, i32, env, i32, i32)
+DEF_HELPER_3(atomic_xchgl, i32, env, i32, i32)
+
 #ifdef TARGET_AARCH64
 #include "helper-a64.h"
 #endif
-- 
2.5.0