JVM, Class Files, and the CLEmitter - Introduction to Compiler Construction in a Java World - page 332

D.5.6 Bit Instructions

Mnemonic Operation Operand Stack

ishl Shift left int ;value1;value2 ) ;result
ishr Arithmetic shift right int ;value1;value2 ) ;result
iushr Logical shift right int ;value1;value2 ) ;result
lshl Shift left long ;value1;value2 ) ;result
lshr Arithmetic

shift right ;value1;value2 ) ;result

long

lushr Logical shift right long ;value1;value2 ) ;result
ior Boolean OR int ;value1;value2 ) ;result
lor Boolean OR long ;value1;value2 ) ;result
iand Boolean AND int ;value1;value2 ) ;result
land Boolean AND long ;value1;value2 ) ;result
ixor Boolean XOR int ;value1;value2 ) ;result
lxor Boolean XOR long ;value1;value2 ) ;result

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

publicvoidaddNoArgInstruction(intopcode)

where opcode is the mnemonic of the instruction to be added.

D.5.7 Comparison Instructions

Mnemonic Operation Operand Stack

dcmpg Compare double ; result is
1 if at least one value is
NaN

;value1;value2 ) ;result

dcmpl Compare double ; result is
1 if at least one value is
NaN

;value1;value2 ) ;result

fcmpg Compare float ; result is 1
if at least one value is NaN

;value1;value2 ) ;result

fcmpl Compare float ; result is
1 if at least one value is
NaN

;value1;value2 ) ;result

lcmp Compare long ;value1;value2 ) ;result

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

publicvoidaddNoArgInstruction(intopcode)

where opcode is the mnemonic of the instruction to be added.