s390x/tcg: Implement VECTOR CHECKSUM
Time to introduce read_vec_element_i32 and write_vec_element_i32. Take proper care of properly adding the carry. We can perform both additions including the carry via tcg_gen_add2_i32(). Reviewed-by: NRichard Henderson <richard.henderson@linaro.org> Signed-off-by: NDavid Hildenbrand <david@redhat.com>
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