Unspecified destination length of vector instructions with just one broadcast immediate input
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Kulasko commented
As far as I've seen, the assembler and emulator both handle this case as a scalar operation, so I propose adding a note of this case in chapter 3.2 (Coding of operands) under "Combining vectors with different lengths", as the length of the destination register is defined there.
AgnerF commented
The next update will say:
An immediate operand will be broadcast to the vector length of the destination. If there are no other source operands then the destination will be a scalar.