Divides the source operand of type vector_int32_t into two parts in units of 256B, reads one part of the elements, converts them to vector_int64_t type, and writes the result to the destination operand.
asc_int322int64: writes the upper half of the source operand to the destination operand.
asc_int322int64_v2: writes the lower half of the source operand to the destination operand.
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For details about vector data registers and mask registers, see .
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