141.

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ifgt

jump if greater than zero

Jasmin Syntax

     ifgt <label> 

<label> is a label name. To define the location of the label, use the <label> name followed by a colon:

 <label>: 

<label> then becomes associated the address of the following instruction. Labels can only be assigned one location in a method. On the other hand, a single <label> can be the target of multiple branch instructions.

Stack

Before	After
value	...
...

Description

ifgt pops the top int off the operand stack. If the int is greater than zero, execution branches to the address (pc + branchoffset), where pc is the address of the ifgt opcode in the bytecode and branchoffset is a 16-bit signed integer parameter following the ifgt opcode in the bytecode. If the int on the stack does is less than or equal to zero, execution continues at the next instruction.

If you are using Jasmin, branchoffset is computed for you from the address of <label>.

Example

     iload_1         ; push the int value in local variable 1 onto the stack     ifgt Label      ; if the value on the stack is greater than zero, jump to Label     return          ; return if local variable 1 is less than or equal to zero Label:     ; execution continues here if local variable 1 is greater than zero... 

Bytecode

Type	Description
u1	ifgt opcode = 0x9D (157)
s2	branchoffset

See Also

ifnull, ifeq, ifle, ifne, ifnonnull, iflt, ifge

Notes

Addresses are measured in bytes from the start of the bytecode (i.e. address 0 is the first byte in the bytecode of the currently executing method).

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Java Virtual Machine, by Jon Meyer and Troy Downing, O'Reilly Associates