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s390x/tcg: Fix VECTOR SHIFT RIGHT ARITHMETIC BY BYTE 

We forgot to propagate the highest bit accross the high doubleword in
two cases (shift >=64).

Fixes: 5f724887e3 ("s390x/tcg: Implement VECTOR SHIFT RIGHT ARITHMETIC")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20191021085715.3797-4-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
master
David Hildenbrand 2019-10-21 10:57:12 +02:00 committed by Cornelia Huck
parent 8b95251947
commit b57b336876
1 changed files with 4 additions and 2 deletions
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6
target/s390x/vec_int_helper.c
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@ -70,15 +70,17 @@ static void s390_vec_sar(S390Vector *d, const S390Vector *a, uint64_t count)
d->doubleword[0] = a->doubleword[0];
d->doubleword[1] = a->doubleword[1];
} else if (count == 64) {
tmp = (int64_t)a->doubleword[0] >> 63;
d->doubleword[1] = a->doubleword[0];
d->doubleword[0] = 0;
d->doubleword[0] = tmp;
} else if (count < 64) {
tmp = a->doubleword[1] >> count;
d->doubleword[1] = deposit64(tmp, 64 - count, count, a->doubleword[0]);
d->doubleword[0] = (int64_t)a->doubleword[0] >> count;
} else {
tmp = (int64_t)a->doubleword[0] >> 63;
d->doubleword[1] = (int64_t)a->doubleword[0] >> (count - 64);
d->doubleword[0] = 0;
d->doubleword[0] = tmp;
}
}