cranelift::prelude::isa::x64::encoding::rex

Struct RexFlags

pub struct RexFlags(/* private fields */);
Expand description

A small bit field to record a REX prefix specification:

  • bit 0 set to 1 indicates REX.W must be 0 (cleared).
  • bit 1 set to 1 indicates the REX prefix must always be emitted.

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impl RexFlags

pub fn set_w() -> RexFlags

By default, set the W field, and don’t always emit.

pub fn clear_w() -> RexFlags

Creates a new RexPrefix for which the REX.W bit will be cleared.

pub fn must_clear_w(&self) -> bool

True if 64-bit operands are used.

pub fn always_emit(&mut self) -> &mut RexFlags

Require that the REX prefix is emitted.

pub fn must_always_emit(&self) -> bool

True if the REX prefix must always be emitted.

pub fn always_emit_if_8bit_needed(&mut self, reg: Reg) -> &mut RexFlags

Emit the rex prefix if the referenced register would require it for 8-bit operations.

pub fn emit_one_op<BS>(&self, sink: &mut BS, enc_e: u8)
where BS: ByteSink + ?Sized,

Emit a unary instruction.

pub fn emit_two_op<BS>(&self, sink: &mut BS, enc_g: u8, enc_e: u8)
where BS: ByteSink + ?Sized,

Emit a binary instruction.

pub fn emit_three_op<BS>( &self, sink: &mut BS, enc_g: u8, enc_index: u8, enc_base: u8, )
where BS: ByteSink + ?Sized,

Emit a ternary instruction.

Trait Implementations§

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impl Clone for RexFlags

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fn clone(&self) -> RexFlags

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
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impl From<(OperandSize, Reg)> for RexFlags

Generate Rex flags for an OperandSize/register tuple.

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fn from(_: (OperandSize, Reg)) -> RexFlags

Converts to this type from the input type.
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impl From<OperandSize> for RexFlags

Generate the proper Rex flags for the given operand size.

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fn from(size: OperandSize) -> RexFlags

Converts to this type from the input type.
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impl Copy for RexFlags

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.