==== 7.5.36 if_acmp<cond>_w ====

Branch if reference comparison succeeds (wide index) 

Format 

if_acmp_w 

branchbyte1 

branchbyte2 

Forms 

if_acmpeq_w = 160 (0xa0) if_acmpne_w = 161 (0xa1) 

Stack 

..., value1, value2 -> ... 

Description 

Both value1 and value2 must be of type reference. They are both popped from the operand stack and compared. The results of the comparisons are as follows: 

 

  *eq   succeeds if and only if value1 = value2    

  *ne  succeeds if and only if value1  value2    

If the comparison succeeds, the unsigned bytes branchbyte1 and branchbyte2 are used to construct a signed 16-bit branchoffset, where branchoffset is (branchbyte1 _w instruction. The target address must be that of an opcode of an instruction within the method that contains this if_acmp_w instruction. 

Otherwise, execution proceeds at the address of the instruction following this if_acmp_w instruction.