# move-result

## Purpose

Move the single-word non-object result of the most recent invoke-kind into the indicated register. This must be done as the instruction immediately after an invoke-kind whose (single-word, non-object) result is not to be ignored; anywhere else is invalid.

## Details

Op & Format | Mnemonic / Syntax | Arguments
--- | --- | ---
0a 11x | move-result vAA | `A:` destination register (8 bits)

## Constraints

- A must be a valid register index in the current stack frame.
- The instruction must be immediately preceded (in the code array) by an invoke-kind instruction.
- The instruction must be immediately reached (in the actual control flow) through returning from this invoke-kind instruction (it must not be jumped to).
- The result delivered by the invoke-kind instruction must not be a reference value or require a register pair.

## Behavior

- The result delivered by the invoke-kind instruction is moved to register vA, that is, vA' = result.
- If register v(A-1) is the lower half of a register pair, register v(A-1)' becomes undefined.
- If register v(A+1) is the upper half of a register pair, register v(A+1)' becomes undefined.

## Exceptions

None.

## Notes

This instruction can also be thought of as reading the contents of a special "result" register that is made valid and defined by executing a non-void return instruction or a filled-new-array instruction. The execution of any other instruction (including this one) renders this special register invalid.