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.