Struct OpcodeCosts

pub struct OpcodeCosts {

    pub bit: u32,
    pub add: u32,
    pub mul: u32,
    pub div: u32,
    pub load: u32,
    pub store: u32,
    pub op_const: u32,
    pub local: u32,
    pub global: u32,
    pub integer_comparison: u32,
    pub conversion: u32,
    pub unreachable: u32,
    pub nop: u32,
    pub current_memory: u32,
    pub grow_memory: u32,
    pub control_flow: ControlFlowCosts,
    pub sign: u32,
}

Available on crate feature std only.

Definition of a cost table for Wasm opcodes.

This is taken (partially) from parity-ethereum.

Fields

bit: u32

Bit operations multiplier.

add: u32

Arithmetic add operations multiplier.

mul: u32

Mul operations multiplier.

div: u32

Div operations multiplier.

load: u32

Memory load operation multiplier.

store: u32

Memory store operation multiplier.

op_const: u32

Const operation multiplier.

local: u32

Local operations multiplier.

global: u32

Global operations multiplier.

integer_comparison: u32

Integer operations multiplier.

conversion: u32

Conversion operations multiplier.

unreachable: u32

Unreachable operation multiplier.

nop: u32

Nop operation multiplier.

current_memory: u32

Get current memory operation multiplier.

grow_memory: u32

Grow memory cost, per page (64kb)

control_flow: ControlFlowCosts

Control flow operations multiplier.

sign: u32

Sign ext operations costs

Trait Implementations

impl Add for OpcodeCosts

type Output = OpcodeCosts

The resulting type after applying the + operator.

fn add(self, rhs: OpcodeCosts) -> OpcodeCosts

Performs the + operation.

impl Clone for OpcodeCosts

fn clone(&self) -> OpcodeCosts

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl DataSize for OpcodeCosts

const IS_DYNAMIC: bool = false

If true, the type has a heap size that can vary at runtime, depending on the actual value.

const STATIC_HEAP_SIZE: usize = 0usize

The amount of space a value of the type always occupies. If IS_DYNAMIC is false, this is the total amount of heap memory occupied by the value. Otherwise this is a lower bound.

fn estimate_heap_size(&self) -> usize

Estimates the size of heap memory taken up by this value.

impl Debug for OpcodeCosts

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for OpcodeCosts

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for OpcodeCosts

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Distribution<OpcodeCosts> for Standard

Available on crate feature testing only.

fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> OpcodeCosts

Generate a random value of T, using rng as the source of randomness.

fn sample_iter<R>(self, rng: R) -> DistIter<Self, R, T>

where R: Rng, Self: Sized,

Create an iterator that generates random values of T, using rng as the source of randomness.

fn map<F, S>(self, func: F) -> DistMap<Self, F, T, S>

where F: Fn(T) -> S, Self: Sized,

Create a distribution of values of ‘S’ by mapping the output of Self through the closure F

impl FromBytes for OpcodeCosts

fn from_bytes(bytes: &[u8]) -> Result<(Self, &[u8]), Error>

Deserializes the slice into Self.

fn from_vec(bytes: Vec<u8>) -> Result<(Self, Vec<u8>), Error>

Deserializes the Vec<u8> into Self.

impl PartialEq for OpcodeCosts

fn eq(&self, other: &OpcodeCosts) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for OpcodeCosts

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToBytes for OpcodeCosts

fn to_bytes(&self) -> Result<Vec<u8>, Error>

Serializes &self to a Vec<u8>.

fn serialized_length(&self) -> usize

Returns the length of the Vec<u8> which would be returned from a successful call to to_bytes() or into_bytes(). The data is not actually serialized, so this call is relatively cheap.

fn into_bytes(self) -> Result<Vec<u8>, Error>

where Self: Sized,

Consumes self and serializes to a Vec<u8>.

fn write_bytes(&self, writer: &mut Vec<u8>) -> Result<(), Error>

Writes &self into a mutable writer.

impl Zero for OpcodeCosts

fn zero() -> Self

Returns the additive identity element of Self, 0.

fn is_zero(&self) -> bool

Returns true if self is equal to the additive identity.

fn set_zero(&mut self)

Sets self to the additive identity element of Self, 0.

impl Copy for OpcodeCosts

impl Eq for OpcodeCosts

impl StructuralPartialEq for OpcodeCosts