1 files changed, 12 insertions, 0 deletions
diff --git a/target-s390x/int_helper.c b/target-s390x/int_helper.c
index dc16de206c..685830124f 100644
--- a/target-s390x/int_helper.c
+++ b/target-s390x/int_helper.c
@@ -191,3 +191,15 @@ uint64_t HELPER(cvd)(int32_t bin)
 
     return dec;
 }
+
+uint64_t HELPER(popcnt)(uint64_t r2)
+{
+    uint64_t ret = 0;
+    int i;
+
+    for (i = 0; i < 64; i += 8) {
+        uint64_t t = ctpop32((r2 >> i) & 0xff);
+        ret |= t << i;
+    }
+    return ret;
+}