Enum cranelift_codegen::data_value::DataValue

pub enum DataValue {
    I8(i8),
    I16(i16),
    I32(i32),
    I64(i64),
    I128(i128),
    U8(u8),
    U16(u16),
    U32(u32),
    U64(u64),
    U128(u128),
    F32(Ieee32),
    F64(Ieee64),
    V128([u8; 16]),
    V64([u8; 8]),
}

Represent a data value. Where Value is an SSA reference, DataValue is the type + value that would be referred to by a Value.

Variants

I8(i8)

I16(i16)

I32(i32)

I64(i64)

I128(i128)

U8(u8)

U16(u16)

U32(u32)

U64(u64)

U128(u128)

F32(Ieee32)

F64(Ieee64)

V128([u8; 16])

V64([u8; 8])

Implementations

impl DataValue

pub fn from_integer(
    imm: i128,
    ty: Type
) -> Result<DataValue, DataValueCastFailure>

Try to cast an immediate integer (a wrapped i64 on most Cranelift instructions) to the given Cranelift Type.

pub fn ty(&self) -> Type

Return the Cranelift IR Type for this DataValue.

Examples found in repository

src/data_value.rs (line 157)

    pub unsafe fn write_value_to(&self, p: *mut u128) {
        let size = self.ty().bytes() as usize;
        self.write_to_slice(std::slice::from_raw_parts_mut(p as *mut u8, size));
    }

pub fn is_vector(&self) -> bool

Return true if the value is a vector (i.e. DataValue::V128).

pub fn write_to_slice(&self, dst: &mut [u8])

Write a DataValue to a slice.

Panics:

Panics if the slice does not have enough space to accommodate the DataValue

Examples found in repository

src/data_value.rs (line 158)

    pub unsafe fn write_value_to(&self, p: *mut u128) {
        let size = self.ty().bytes() as usize;
        self.write_to_slice(std::slice::from_raw_parts_mut(p as *mut u8, size));
    }

pub fn read_from_slice(src: &[u8], ty: Type) -> Self

Read a DataValue from a slice using a given Type.

Panics:

Panics if the slice does not have enough space to accommodate the DataValue

Examples found in repository

src/data_value.rs (lines 163-166)

    pub unsafe fn read_value_from(p: *const u128, ty: Type) -> Self {
        DataValue::read_from_slice(
            std::slice::from_raw_parts(p as *const u8, ty.bytes() as usize),
            ty,
        )
    }

pub unsafe fn write_value_to(&self, p: *mut u128)

Write a DataValue to a memory location.

pub unsafe fn read_value_from(p: *const u128, ty: Type) -> Self

Read a DataValue from a memory location using a given Type.

pub fn bitwise_eq(&self, other: &DataValue) -> bool

Performs a bitwise comparison over the contents of DataValue.

Returns true if all bits are equal.

This behaviour is different from PartialEq for NaN floats.

Trait Implementations

impl Clone for DataValue

fn clone(&self) -> DataValue

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DataValue

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

Formats the value using the given formatter.

impl Display for DataValue

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

Formats the value using the given formatter.

impl From<[u8; 16]> for DataValue

fn from(data: [u8; 16]) -> Self

Converts to this type from the input type.

impl From<[u8; 8]> for DataValue

fn from(data: [u8; 8]) -> Self

Converts to this type from the input type.

impl From<Ieee32> for DataValue

fn from(data: Ieee32) -> Self

Converts to this type from the input type.

impl From<Ieee64> for DataValue

fn from(data: Ieee64) -> Self

Converts to this type from the input type.

impl From<Offset32> for DataValue

fn from(o: Offset32) -> Self

Converts to this type from the input type.

impl From<i128> for DataValue

fn from(data: i128) -> Self

Converts to this type from the input type.

impl From<i16> for DataValue

fn from(data: i16) -> Self

Converts to this type from the input type.

impl From<i32> for DataValue

fn from(data: i32) -> Self

Converts to this type from the input type.

impl From<i64> for DataValue

fn from(data: i64) -> Self

Converts to this type from the input type.

impl From<i8> for DataValue

fn from(data: i8) -> Self

Converts to this type from the input type.

impl From<u128> for DataValue

fn from(data: u128) -> Self

Converts to this type from the input type.

impl From<u16> for DataValue

fn from(data: u16) -> Self

Converts to this type from the input type.

impl From<u32> for DataValue

fn from(data: u32) -> Self

Converts to this type from the input type.

impl From<u64> for DataValue

fn from(data: u64) -> Self

Converts to this type from the input type.

impl From<u8> for DataValue

fn from(data: u8) -> Self

Converts to this type from the input type.

impl PartialEq<DataValue> for DataValue

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd<DataValue> for DataValue

fn partial_cmp(&self, other: &DataValue) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryInto<[u8; 16]> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<[u8; 16], Self::Error>

Performs the conversion.

impl TryInto<[u8; 8]> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<[u8; 8], Self::Error>

Performs the conversion.

impl TryInto<Ieee32> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<Ieee32, Self::Error>

Performs the conversion.

impl TryInto<Ieee64> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<Ieee64, Self::Error>

Performs the conversion.

impl TryInto<i128> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<i128, Self::Error>

Performs the conversion.

impl TryInto<i16> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<i16, Self::Error>

Performs the conversion.

impl TryInto<i32> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<i32, Self::Error>

Performs the conversion.

impl TryInto<i64> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<i64, Self::Error>

Performs the conversion.

impl TryInto<i8> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<i8, Self::Error>

Performs the conversion.

impl TryInto<u128> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<u128, Self::Error>

Performs the conversion.

impl TryInto<u16> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<u16, Self::Error>

Performs the conversion.

impl TryInto<u32> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<u32, Self::Error>

Performs the conversion.

impl TryInto<u64> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<u64, Self::Error>

Performs the conversion.

impl TryInto<u8> for DataValue

type Error = DataValueCastFailure

The type returned in the event of a conversion error.

fn try_into(self) -> Result<u8, Self::Error>

Performs the conversion.