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s390x/tcg: MVC: Use is_destructive_overlap()

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Let's use the new helper, that also detects destructive overlaps when
wrapping.

We'll make the remaining code (e.g., fast_memmove()) aware of wrapping
later.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2019-09-03 13:38:12 +02:00
parent d573ffde0c
commit b7dd1f7fd4
1 changed files with 1 additions and 1 deletions
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target/s390x/mem_helper.c
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@ -330,7 +330,7 @@ static uint32_t do_helper_mvc(CPUS390XState *env, uint32_t l, uint64_t dest,
*/
if (dest == src + 1) {
fast_memset(env, dest, cpu_ldub_data_ra(env, src, ra), l, ra);
} else if (dest < src || src + l <= dest) {
} else if (!is_destructive_overlap(env, dest, src, l)) {
fast_memmove(env, dest, src, l, ra);
} else {
for (i = 0; i < l; i++) {