1 files changed, 11 insertions, 0 deletions
diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c
index 34d730ba73..d5497cbcba 100644
--- a/target/s390x/misc_helper.c
+++ b/target/s390x/misc_helper.c
@@ -455,6 +455,17 @@ void HELPER(per_check_exception)(CPUS390XState *env)
     }
 }
 
+/* Check if an address is within the PER starting address and the PER
+   ending address.  The address range might loop.  */
+static inline bool get_per_in_range(CPUS390XState *env, uint64_t addr)
+{
+    if (env->cregs[10] <= env->cregs[11]) {
+        return env->cregs[10] <= addr && addr <= env->cregs[11];
+    } else {
+        return env->cregs[10] <= addr || addr <= env->cregs[11];
+    }
+}
+
 void HELPER(per_branch)(CPUS390XState *env, uint64_t from, uint64_t to)
 {
     if ((env->cregs[9] & PER_CR9_EVENT_BRANCH)) {