ifeq : jump if zero : index : visitJumpInsn()

Description

ifeq pops the top int off the operand stack. If the int equals zero, execution branches to the address (pc + branchoffset), where pc is the address of the ifeq opcode in the bytecode and branchoffset is a 16-bit signed integer parameter following the ifeq opcode in the bytecode. If the int on the stack does not equal 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
    ifeq Label      ; if the value of local variable 1 is zero, jump to Label
    return          ; return if local variable 1 is nonzero
Label:
    ; execution continues here if local variable 1 equals zero...

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).

See also

ifnull iflt ifle ifne ifnonnull ifgt ifge

Stack

Before	After
value	...
...	...

Bytecode

Type	Description
u1	ifeq opcode = 0x99 (153)
s2	branchoffset