instruction

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Published: Oct 30, 2018 License: Apache-2.0 Imports: 2 Imported by: 0

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Overview

Package instruction defines WASM instruction types.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Block

type Block struct {
	NoImmediateArgs
	Type   *types.ValueType
	Instrs []Instruction
}

Block represents a WASM block instruction.

func (Block) BlockType

func (i Block) BlockType() *types.ValueType

BlockType returns the type of the block's return value.

func (Block) Instructions

func (i Block) Instructions() []Instruction

Instructions returns the instructions contained in the block.

func (Block) Op

func (Block) Op() opcode.Opcode

Op returns the opcode of the instruction

type BrIf

type BrIf struct {
	Index uint32
}

BrIf represents a WASM br_if instruction.

func (BrIf) ImmediateArgs

func (i BrIf) ImmediateArgs() []interface{}

ImmediateArgs returns the block index to break to.

func (BrIf) Op

func (BrIf) Op() opcode.Opcode

Op returns the opcode of the instruction.

type Call

type Call struct {
	Index uint32
}

Call represents a WASM call instruction.

func (Call) ImmediateArgs

func (i Call) ImmediateArgs() []interface{}

ImmediateArgs returns the function index.

func (Call) Op

func (Call) Op() opcode.Opcode

Op returns the opcode of the instruction.

type End

type End struct {
	NoImmediateArgs
}

End represents the special WASM end instruction.

func (End) Op

func (End) Op() opcode.Opcode

Op returns the opcode of the instruction.

type GetLocal

type GetLocal struct {
	Index uint32
}

GetLocal represents the WASM get_local instruction.

func (GetLocal) ImmediateArgs

func (i GetLocal) ImmediateArgs() []interface{}

ImmediateArgs returns the index of the local variable to push onto the stack.

func (GetLocal) Op

func (GetLocal) Op() opcode.Opcode

Op returns the opcode of the instruction.

type I32Const

type I32Const struct {
	Value int32
}

I32Const represents the WASM i32.const instruction.

func (I32Const) ImmediateArgs

func (i I32Const) ImmediateArgs() []interface{}

ImmediateArgs returns the i32 value to push onto the stack.

func (I32Const) Op

func (I32Const) Op() opcode.Opcode

Op returns the opcode of the instruction.

type I32Eqz

type I32Eqz struct {
	NoImmediateArgs
}

I32Eqz represents the WASM i32.eqz instruction.

func (I32Eqz) Op

func (I32Eqz) Op() opcode.Opcode

Op returns the opcode of the instruction.

type I32GeS

type I32GeS struct {
	NoImmediateArgs
}

I32GeS represents the WASM i32.ge_s instruction.

func (I32GeS) Op

func (I32GeS) Op() opcode.Opcode

Op returns the opcode of the instruction.

type I32GtS

type I32GtS struct {
	NoImmediateArgs
}

I32GtS represents the WASM i32.gt_s instruction.

func (I32GtS) Op

func (I32GtS) Op() opcode.Opcode

Op returns the opcode of the instruction.

type I32LeS

type I32LeS struct {
	NoImmediateArgs
}

I32LeS represents the WASM i32.le_s instruction.

func (I32LeS) Op

func (I32LeS) Op() opcode.Opcode

Op returns the opcode of the instruction.

type I32LtS

type I32LtS struct {
	NoImmediateArgs
}

I32LtS represents the WASM i32.lt_s instruction.

func (I32LtS) Op

func (I32LtS) Op() opcode.Opcode

Op returns the opcode of the instruction.

type I64Const

type I64Const struct {
	Value int64
}

I64Const represents the WASM i64.const instruction.

func (I64Const) ImmediateArgs

func (i I64Const) ImmediateArgs() []interface{}

ImmediateArgs returns the i64 value to push onto the stack.

func (I64Const) Op

func (I64Const) Op() opcode.Opcode

Op returns the opcode of the instruction.

type Instruction

type Instruction interface {
	Op() opcode.Opcode
	ImmediateArgs() []interface{}
}

Instruction represents a single WASM instruction.

type Loop

type Loop struct {
	NoImmediateArgs
	Type   *types.ValueType
	Instrs []Instruction
}

Loop represents a WASM loop instruction.

func (Loop) BlockType

func (i Loop) BlockType() *types.ValueType

BlockType returns the type of the loop's return value.

func (Loop) Instructions

func (i Loop) Instructions() []Instruction

Instructions represents the instructions contained in the loop.

func (Loop) Op

func (Loop) Op() opcode.Opcode

Op returns the opcode of the instruction.

type NoImmediateArgs

type NoImmediateArgs struct {
}

NoImmediateArgs indicates the instruction has no immediate arguments.

func (NoImmediateArgs) ImmediateArgs

func (NoImmediateArgs) ImmediateArgs() []interface{}

ImmediateArgs returns the immedate arguments of an instruction.

type Nop

type Nop struct {
	NoImmediateArgs
}

Nop represents a WASM no-op instruction.

func (Nop) Op

func (Nop) Op() opcode.Opcode

Op returns the opcode of the instruction.

type Return

type Return struct {
	NoImmediateArgs
}

Return represents a WASM return instruction.

func (Return) Op

func (Return) Op() opcode.Opcode

Op returns the opcode of the instruction.

type SetLocal

type SetLocal struct {
	Index uint32
}

SetLocal represents the WASM set_local instruction.

func (SetLocal) ImmediateArgs

func (i SetLocal) ImmediateArgs() []interface{}

ImmediateArgs returns the index of the local variable to set with the top of the stack.

func (SetLocal) Op

func (SetLocal) Op() opcode.Opcode

Op returns the opcode of the instruction.

type StructuredInstruction

type StructuredInstruction interface {
	Instruction
	BlockType() *types.ValueType
	Instructions() []Instruction
}

StructuredInstruction represents a structured control instruction like br_if.

type Unreachable

type Unreachable struct {
	NoImmediateArgs
}

Unreachable reprsents an unreachable opcode.

func (Unreachable) Op

func (Unreachable) Op() opcode.Opcode

Op returns the opcode of the instruction.

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