Class WasmMemoryInstruction

java.lang.Object

de.inetsoftware.jwebassembly.module.WasmInstruction

de.inetsoftware.jwebassembly.module.WasmMemoryInstruction

class WasmMemoryInstruction
extends WasmInstruction

WasmInstruction for load and store to the linear memory.

Nested Class Summary

Nested classes/interfaces inherited from class WasmInstruction

WasmInstruction.Type

Field Summary

Fields

Modifier and Type	Field	Description
private int	alignment
private int	offset
private MemoryOperator	op
private ValueType	type

Constructor Summary

Constructors

Constructor	Description
WasmMemoryInstruction(MemoryOperator op, ValueType type, int offset, int alignment, int javaCodePos, int lineNumber)	Create an instance of a load/store to the linear memory instruction

Method Summary

Modifier and Type	Method	Description
(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

op

private MemoryOperator op

type

private ValueType type

offset

private int offset

alignment

private int alignment

Constructor Details

WasmMemoryInstruction

WasmMemoryInstruction(MemoryOperator op,
 ValueType type,
 int offset,
 int alignment,
 int javaCodePos,
 int lineNumber)

Create an instance of a load/store to the linear memory instruction

Parameters:

op - the operation

type - the type of the static field

offset - the base offset which will be added to the offset value on the stack

alignment - the alignment of the value on the linear memory (0: 8 Bit; 1: 16 Bit; 2: 32 Bit)

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

getPopValueTypes

AnyType[] getPopValueTypes()

Specified by:

getPopValueTypes in class WasmInstruction