Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/hppa/translate.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/target/hppa/translate.c b/target/hppa/translate.c
index 753748082b..7e723dcd24 100644
--- a/target/hppa/translate.c
+++ b/target/hppa/translate.c
@@ -3122,6 +3122,17 @@ static bool do_addb(DisasContext *ctx, unsigned r, TCGv_reg in1,
     DisasCond cond;
     bool d = false;
 
+    /*
+     * For hppa64, the ADDB conditions change, dropping ZNV, SV, OD
+     * in favor of double-word EQ, LT, LE.
+     */
+    if (ctx->is_pa20) {
+        d = c >= 5;
+        if (d) {
+            c &= 3;
+        }
+    }
+
     in2 = load_gpr(ctx, r);
     dest = tcg_temp_new();
     sv = NULL;
-- 
2.34.1