diff --git a/target/hppa/translate.c b/target/hppa/translate.c
index 2cb91956da..ceb739c54a 100644
--- a/target/hppa/translate.c
+++ b/target/hppa/translate.c
@@ -1126,6 +1126,9 @@ static void do_add(DisasContext *ctx, unsigned rt, TCGv_i64 in1,
     if (is_tsv || cond_need_sv(c)) {
         sv = do_add_sv(ctx, dest, in1, in2);
         if (is_tsv) {
+            if (!d) {
+                tcg_gen_ext32s_i64(sv, sv);
+            }
             /* ??? Need to include overflow from shift.  */
             gen_helper_tsv(tcg_env, sv);
         }
@@ -1217,6 +1220,9 @@ static void do_sub(DisasContext *ctx, unsigned rt, TCGv_i64 in1,
     if (is_tsv || cond_need_sv(c)) {
         sv = do_sub_sv(ctx, dest, in1, in2);
         if (is_tsv) {
+            if (!d) {
+                tcg_gen_ext32s_i64(sv, sv);
+            }
             gen_helper_tsv(tcg_env, sv);
         }
     }