JVM, Class Files, and the CLEmitter - Introduction to Compiler Construction in a Java World - page 337

where opcode is the mnemonic of the instruction to be added, and arg is the index of the
local variable.

Mnemonic Operation Operand Stack

iinc Increment

local variable No change

by constant

The above instruction can be added to the code section of a method by sending the
CLEmitter instance the following message:

publicvoidaddIINCInstruction(intindex,
intconstVal)

where index is the local variable index, and constVal is the constant by which to increment.

Mnemonic Operation Operand Stack

bipush Push byte ) ;value
sipush Push short ) ;value

The above instructions can be added to the code section of a method by sending the
CLEmitter instance the following message:

publicvoidaddOneArgInstruction(intopcode,
intarg)

where opcode is the mnemonic of the instruction to be added, and arg is byte or short
value to push.
ldc 15 instruction can be added to the code section of a method using one of the following
CLEmitter functions:

publicvoidaddLDCInstruction(inti)
publicvoidaddLDCInstruction(longl)
publicvoidaddLDCInstruction(floatf)
publicvoidaddLDCInstruction(doubled)
publicvoidaddLDCInstruction(Strings)

where the argument is the type of the item.

D.5.11 Stack Instructions

Mnemonic Operation Operand Stack

pop Pop the top operand stack
value

;value )

pop2 Pop the top one or two
operand stack values

;value2;value1 )

;value )

dup Duplicate the top operand
stack value

;value ) ;value;value

15 The CLEmitter interface implicitly adds ldc_w and ldc2_w instructions where necessary.