[PATCH 07/12] target/s390x: Fix relative long instructions with large offsets

[Ilya Leoshkevich]

The expression "imm * 2" in gen_ri2() can wrap around if imm is large
enough.

Fix by casting imm to int64_t, like it's done in disas_jdest().

Fixes: e8ecdfeb30f0 ("Fix EXECUTE of relative branches")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 target/s390x/tcg/translate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index a6079ab7b4f..6661b27efa4 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -5794,7 +5794,7 @@ static TCGv gen_ri2(DisasContext *s)
 
     disas_jdest(s, i2, is_imm, imm, ri2);
     if (is_imm) {
-        ri2 = tcg_constant_i64(s->base.pc_next + imm * 2);
+        ri2 = tcg_constant_i64(s->base.pc_next + (int64_t)imm * 2);
     }
 
     return ri2;
-- 
2.41.0