✎ javacard:jcvm:7.5.37_if_scmp_cond [wiki]

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==== 7.5.37 if_scmp<cond> ====

Branch if short comparison succeeds 

Format 

if_scmp 

branch 

Forms 

if_scmpeq = 106 (0x6a) if_scmpne = 107 (0x6b) if_scmplt = 108 (0x6c) if_scmpge = 109 (0x6d) if_scmpgt = 110 (0x6e) if_scmple = 111 (0x6f) 

Stack 

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

Description 

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

 

  *eq  succeeds if and only if value1 = value2    

  *ne  succeeds if and only if value1  value2    

  *lt  succeeds if and only if value1 < value2    

  *le  succeeds if and only if value1 &#163; value2    

  *gt  succeeds if and only if value1 > value2    

  *ge  succeeds if and only if value1 &#8805; value2    

If the comparison succeeds, branch is used as signed 8-bit offset, and execution proceeds at that offset from the address of the opcode of this if_scmp instruction. The target address must be that of an opcode of an instruction within the method that contains this if_scmp instruction. 

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

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