Class JumpInstruction

java.lang.Object

de.inetsoftware.jwebassembly.module.WasmInstruction

de.inetsoftware.jwebassembly.module.JumpInstruction

class JumpInstruction
extends WasmInstruction

Placeholder for a jump to inspect the stack. It is like a nop operation.

Nested Class Summary

Nested classes/interfaces inherited from class WasmInstruction

WasmInstruction.Type

Field Summary

Fields

Modifier and Type	Field	Description
private int	jumpPos
private int	popCount
private AnyType	pushValueType

Constructor Summary

Constructors

Constructor	Description
JumpInstruction(int jumpPos, int popCount, AnyType pushValueType, int javaCodePos, int lineNumber)	Create an instance of a nop instruction

Method Summary

Modifier and Type	Method	Description
(package private) int	getJumpPosition()	Get the jump position
(package private) int	getPopCount()	Get the count of values that are removed from the stack.
(package private) AnyType[]	getPopValueTypes()
(package private) AnyType	getPushValueType()	Get the ValueType if this instruction push a value on the stack.
(package private) WasmInstruction.Type	getType()	Get the type of instruction
void	writeTo(ModuleWriter writer)	Write this instruction to the WASM module.

Methods inherited from class WasmInstruction

getCodePosition, getLineNumber, setCodePosition

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

jumpPos

private int jumpPos

popCount

private int popCount

pushValueType

private AnyType pushValueType

Constructor Details

JumpInstruction

JumpInstruction(int jumpPos,
 int popCount,
 AnyType pushValueType,
 int javaCodePos,
 int lineNumber)

Create an instance of a nop instruction

Parameters:

jumpPos - the position of the jump

popCount - the the count of values that are removed from the stack.

pushValueType - optional type of a push value

javaCodePos - the code position/offset in the Java method

lineNumber - the line number in the Java source code

Method Details

getType

WasmInstruction.Type getType()

Get the type of instruction

Specified by:

getType in class WasmInstruction

Returns:

the type

writeTo

public void writeTo(@Nonnull
 ModuleWriter writer)
             throws IOException

Write this instruction to the WASM module.

Specified by:

writeTo in class WasmInstruction

Parameters:

writer - the target writer

Throws:

IOException - if any I/O error occur

getPushValueType

AnyType getPushValueType()

Get the ValueType if this instruction push a value on the stack.

Specified by:

getPushValueType in class WasmInstruction

Returns:

the ValueType or null if no value is push

getPopCount

int getPopCount()

Get the count of values that are removed from the stack.

Specified by:

getPopCount in class WasmInstruction

Returns:

the count

getJumpPosition

int getJumpPosition()

Get the jump position

Returns:

the position

getPopValueTypes

AnyType[] getPopValueTypes()

Specified by:

getPopValueTypes in class WasmInstruction