Enum tinywasm::types::Instruction

source ·

pub enum Instruction {
Show 197 variants
    BrLabel(u32),
    Unreachable,
    Nop,
    Block(BlockArgs, usize),
    Loop(BlockArgs, usize),
    If(BlockArgs, Option<usize>, usize),
    Else(usize),
    EndBlockFrame,
    EndFunc,
    Br(u32),
    BrIf(u32),
    BrTable(u32, usize),
    Return,
    Call(u32),
    CallIndirect(u32, u32),
    Drop,
    Select(Option<ValType>),
    LocalGet(u32),
    LocalSet(u32),
    LocalTee(u32),
    GlobalGet(u32),
    GlobalSet(u32),
    I32Load(MemoryArg),
    I64Load(MemoryArg),
    F32Load(MemoryArg),
    F64Load(MemoryArg),
    I32Load8S(MemoryArg),
    I32Load8U(MemoryArg),
    I32Load16S(MemoryArg),
    I32Load16U(MemoryArg),
    I64Load8S(MemoryArg),
    I64Load8U(MemoryArg),
    I64Load16S(MemoryArg),
    I64Load16U(MemoryArg),
    I64Load32S(MemoryArg),
    I64Load32U(MemoryArg),
    I32Store(MemoryArg),
    I64Store(MemoryArg),
    F32Store(MemoryArg),
    F64Store(MemoryArg),
    I32Store8(MemoryArg),
    I32Store16(MemoryArg),
    I64Store8(MemoryArg),
    I64Store16(MemoryArg),
    I64Store32(MemoryArg),
    MemorySize(u32, u8),
    MemoryGrow(u32, u8),
    I32Const(i32),
    I64Const(i64),
    F32Const(f32),
    F64Const(f64),
    RefNull(ValType),
    RefFunc(u32),
    RefIsNull,
    I32Eqz,
    I32Eq,
    I32Ne,
    I32LtS,
    I32LtU,
    I32GtS,
    I32GtU,
    I32LeS,
    I32LeU,
    I32GeS,
    I32GeU,
    I64Eqz,
    I64Eq,
    I64Ne,
    I64LtS,
    I64LtU,
    I64GtS,
    I64GtU,
    I64LeS,
    I64LeU,
    I64GeS,
    I64GeU,
    F32Eq,
    F32Ne,
    F32Lt,
    F32Gt,
    F32Le,
    F32Ge,
    F64Eq,
    F64Ne,
    F64Lt,
    F64Gt,
    F64Le,
    F64Ge,
    I32Clz,
    I32Ctz,
    I32Popcnt,
    I32Add,
    I32Sub,
    I32Mul,
    I32DivS,
    I32DivU,
    I32RemS,
    I32RemU,
    I32And,
    I32Or,
    I32Xor,
    I32Shl,
    I32ShrS,
    I32ShrU,
    I32Rotl,
    I32Rotr,
    I64Clz,
    I64Ctz,
    I64Popcnt,
    I64Add,
    I64Sub,
    I64Mul,
    I64DivS,
    I64DivU,
    I64RemS,
    I64RemU,
    I64And,
    I64Or,
    I64Xor,
    I64Shl,
    I64ShrS,
    I64ShrU,
    I64Rotl,
    I64Rotr,
    F32Abs,
    F32Neg,
    F32Ceil,
    F32Floor,
    F32Trunc,
    F32Nearest,
    F32Sqrt,
    F32Add,
    F32Sub,
    F32Mul,
    F32Div,
    F32Min,
    F32Max,
    F32Copysign,
    F64Abs,
    F64Neg,
    F64Ceil,
    F64Floor,
    F64Trunc,
    F64Nearest,
    F64Sqrt,
    F64Add,
    F64Sub,
    F64Mul,
    F64Div,
    F64Min,
    F64Max,
    F64Copysign,
    I32WrapI64,
    I32TruncF32S,
    I32TruncF32U,
    I32TruncF64S,
    I32TruncF64U,
    I32Extend8S,
    I32Extend16S,
    I64Extend8S,
    I64Extend16S,
    I64Extend32S,
    I64ExtendI32S,
    I64ExtendI32U,
    I64TruncF32S,
    I64TruncF32U,
    I64TruncF64S,
    I64TruncF64U,
    F32ConvertI32S,
    F32ConvertI32U,
    F32ConvertI64S,
    F32ConvertI64U,
    F32DemoteF64,
    F64ConvertI32S,
    F64ConvertI32U,
    F64ConvertI64S,
    F64ConvertI64U,
    F64PromoteF32,
    I32ReinterpretF32,
    I64ReinterpretF64,
    F32ReinterpretI32,
    F64ReinterpretI64,
    I32TruncSatF32S,
    I32TruncSatF32U,
    I32TruncSatF64S,
    I32TruncSatF64U,
    I64TruncSatF32S,
    I64TruncSatF32U,
    I64TruncSatF64S,
    I64TruncSatF64U,
    TableInit(u32, u32),
    TableGet(u32),
    TableSet(u32),
    TableCopy {
        from: u32,
        to: u32,
    },
    TableGrow(u32),
    TableSize(u32),
    TableFill(u32),
}

Expand description

A WebAssembly Instruction

These are our own internal bytecode instructions so they may not match the spec exactly. Wasm Bytecode can map to multiple of these instructions.

§Differences to the spec

br_table stores the jump lables in the following br_label instructions to keep this enum small.
Lables/Blocks: we store the label end offset in the instruction itself and have seperate EndBlockFrame and EndFunc instructions to mark the end of a block or function. This makes it easier to implement the label stack (we call it BlockFrameStack) iteratively.

See https://webassembly.github.io/spec/core/binary/instructions.html