..., value1, value2
...reference comparison succeeds
| if_acmp<cond> | |
| branchbyte1 | |
| branchbyte2 |
Forms
if_acmpeq = 165 (0xa5) if_acmpne = 166 (0xa6)
Description
Both value1 and value2 must be of type reference. They are both popped from the operand stack and compared. The results of the comparison are as follows:
If the comparison succeeds, the unsigned branchbyte1 and branchbyte2 are used to construct a signed 16-bit offset, where the offset is calculated to be (branchbyte1 << 8) | branchbyte2. Execution then proceeds at that offset from the address of the opcode of this if_acmp<cond> instruction. The target address must be that of an opcode of an instruction within the method that contains this if_acmp<cond> instruction.
Otherwise, if the comparison fails, execution proceeds at the address of the instruction following this if_acmp<cond> instruction.
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Java Virtual Machine Specification (HTML generated by dkramer on February 25, 1997)
Copyright © 1996 Sun Microsystems, Inc.
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value2