... and don't perform any move in case the length is zero. Signed-off-by: David Hildenbrand <da...@redhat.com> --- target/s390x/mem_helper.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c index 041d01d63d..de5e69b500 100644 --- a/target/s390x/mem_helper.c +++ b/target/s390x/mem_helper.c @@ -1973,10 +1973,13 @@ uint32_t HELPER(mvcs)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) s390_program_interrupt(env, PGM_SPECIAL_OP, ILEN_AUTO, ra); } + l = wrap_length(env, l); if (l > 256) { /* max 256 */ l = 256; cc = 3; + } else if (!l) { + return cc; } /* XXX replace w/ memcpy */ @@ -2002,10 +2005,13 @@ uint32_t HELPER(mvcp)(CPUS390XState *env, uint64_t l, uint64_t a1, uint64_t a2) s390_program_interrupt(env, PGM_SPECIAL_OP, ILEN_AUTO, ra); } + l = wrap_length(env, l); if (l > 256) { /* max 256 */ l = 256; cc = 3; + } else if (!l) { + return cc; } /* XXX replace w/ memcpy */ -- 2.21.0