..., value
...reference not null
| ifnonnull | |
| branchbyte1 | |
| branchbyte2 |
Description
The value must of type reference. It is popped from the oper-and stack. If value is not null, 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 ifnonnull instruction. The target address must be that of an opcode of an instruction within the method that contains this ifnonnull instruction.
Otherwise, execution proceeds at the address of the instruction following this ifnonnull instruction.
Contents | Prev | Next | Index
Java Virtual Machine Specification (HTML generated by dkramer on February 25, 1997)
Copyright © 1996 Sun Microsystems, Inc.
All rights reserved
Please send any comments or corrections to doug.kramer@sun.com