From: Ilya Leoshkevich <i...@linux.ibm.com>
When the mask is zero, access exceptions should still be recognized for
1 byte at the second-operand address. CC should be set to 0.
Cc: qemu-sta...@nongnu.org
Fixes: e023e832d0ac ("s390x: translate engine for s390x CPU")
Reviewed-by: David Hildenbrand <da...@redhat.com>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com>
Message-Id: <20230724082032.66864-5-...@linux.ibm.com>
Signed-off-by: Thomas Huth <th...@redhat.com>
---
target/s390x/tcg/translate.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index d6e8acee99..244e61ad2e 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -2515,6 +2515,12 @@ static DisasJumpType op_icm(DisasContext *s, DisasOps *o)
ccm = ((1ull << len) - 1) << pos;
break;
+ case 0:
+ /* Recognize access exceptions for the first byte. */
+ tcg_gen_qemu_ld_i64(tmp, o->in2, get_mem_index(s), MO_UB);
+ gen_op_movi_cc(s, 0);
+ return DISAS_NEXT;
+
default:
/* This is going to be a sequence of loads and inserts. */
pos = base + 32 - 8;
--
2.39.3
