From: Ilya Leoshkevich <iii@linux.ibm.com>
To: Richard Henderson <richard.henderson@linaro.org>,
David Hildenbrand <david@redhat.com>,
Cornelia Huck <cohuck@redhat.com>, Thomas Huth <thuth@redhat.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>,
qemu-s390x@nongnu.org, qemu-devel@nongnu.org,
Ilya Leoshkevich <iii@linux.ibm.com>
Subject: [PATCH v2 2/3] s390x/tcg: Fix BRCL with a large negative offset
Date: Sat, 12 Mar 2022 10:25:40 +0100 [thread overview]
Message-ID: <20220312092541.585282-3-iii@linux.ibm.com> (raw)
In-Reply-To: <20220312092541.585282-1-iii@linux.ibm.com>
When RI2 is 0x80000000, qemu enters an infinite loop instead of jumping
backwards. Fix by adding a missing cast, like in in2_ri2().
Fixes: 7233f2ed1717 ("target-s390: Convert BRANCH ON CONDITION")
Reviewed-by: David Hildenbrand <david@redhat.com>
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 41c8696185..5acfc0ff9b 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -1201,7 +1201,7 @@ static DisasJumpType help_branch(DisasContext *s, DisasCompare *c,
bool is_imm, int imm, TCGv_i64 cdest)
{
DisasJumpType ret;
- uint64_t dest = s->base.pc_next + 2 * imm;
+ uint64_t dest = s->base.pc_next + (int64_t)imm * 2;
TCGLabel *lab;
/* Take care of the special cases first. */
--
2.35.1
next prev parent reply other threads:[~2022-03-12 9:33 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-12 9:25 [PATCH v2 0/3] Fix BRASL and BRCL with large negative offsets Ilya Leoshkevich
2022-03-12 9:25 ` [PATCH v2 1/3] s390x/tcg: Fix BRASL with a large negative offset Ilya Leoshkevich
2022-03-12 9:25 ` Ilya Leoshkevich [this message]
2022-03-12 9:25 ` [PATCH v2 3/3] tests/tcg/s390x: Test BRASL and BRCL with large negative offsets Ilya Leoshkevich
2022-03-12 14:27 ` Richard Henderson
2022-03-14 10:26 ` David Hildenbrand
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