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[PATCH v2 1/2] target/s390x: Use mutable temporary value for op_ts

From: Ilya Leoshkevich
Subject: [PATCH v2 1/2] target/s390x: Use mutable temporary value for op_ts
Date: Mon, 18 Mar 2024 21:27:10 +0100

From: Ido Plat <ido.plat@ibm.com>

Otherwise TCG would assume the register that holds t1 would be constant
and reuse whenever it needs the value within it.

Cc: qemu-stable@nongnu.org
Fixes: f1ea739bd598 ("target/s390x: Use tcg_constant_* in local contexts")
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
[iii: Adjust a newline and capitalization, add tags]
Signed-off-by: Ido Plat <ido.plat@ibm.com>
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
 target/s390x/tcg/translate.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 0d0c672c959..57b7db1ee96 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -4781,9 +4781,10 @@ static DisasJumpType op_trXX(DisasContext *s, DisasOps 
 static DisasJumpType op_ts(DisasContext *s, DisasOps *o)
-    TCGv_i32 t1 = tcg_constant_i32(0xff);
+    TCGv_i32 ff = tcg_constant_i32(0xff);
+    TCGv_i32 t1 = tcg_temp_new_i32();
-    tcg_gen_atomic_xchg_i32(t1, o->in2, t1, get_mem_index(s), MO_UB);
+    tcg_gen_atomic_xchg_i32(t1, o->in2, ff, get_mem_index(s), MO_UB);
     tcg_gen_extract_i32(cc_op, t1, 7, 1);
     return DISAS_NEXT;

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