From: Ilya Leoshkevich <[email protected]> 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: [email protected] Fixes: e023e832d0ac ("s390x: translate engine for s390x CPU") Reviewed-by: David Hildenbrand <[email protected]> Reviewed-by: Richard Henderson <[email protected]> Signed-off-by: Ilya Leoshkevich <[email protected]> Message-Id: <[email protected]> Signed-off-by: Thomas Huth <[email protected]> (cherry picked from commit a2025557ed4d8d5e6a4d0dd681717c390f51f5be) Signed-off-by: Michael Tokarev <[email protected]> diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c index f005539861..9e9fa3cef0 100644 --- a/target/s390x/tcg/translate.c +++ b/target/s390x/tcg/translate.c @@ -2525,6 +2525,12 @@ 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; -- 2.39.2
