Enum RelaxationKind 

pub enum RelaxationKind {
    NoOp,
    ReplaceWithNop,
    CallToJal,
    Hi20ToCLui,
    Hi20Delete,
    Lo12Rs1ToZero,
}

Variants

NoOp

Leave the instruction alone. Used when we only want to change the kind of relocation used.

ReplaceWithNop

Replace with nop

CallToJal

Rewrite auipc+jalr to jal.

Hi20ToCLui

Rewrite 4-byte lui rd, imm to 2-byte c.lui rd, nzimm.

Hi20Delete

Delete the lui instruction entirely when %hi(value) is zero.

Lo12Rs1ToZero

Rewrite the rs1 field of an I-type or S-type instruction from the deleted lui’s rd to x0.

Implementations

impl RelaxationKind

pub fn apply( self, section_bytes: &mut [u8], offset_in_section: &mut u64, _addend: &mut i64, )

pub fn next_modifier(&self) -> RelocationModifier

pub fn hi20_is_zero(value: u64) -> bool

Returns true if the HI20 value is zero, meaning the lui instruction can be deleted entirely and the following LO12 instruction’s rs1 changed to x0.

pub fn hi20_fits_clui(value: u64) -> bool

Returns true if the HI20 value (i.e. (value + 0x800) >> 12) fits in the c.lui 6-bit signed non-zero immediate range: [-32, -1] ∪ [1, 31].

pub fn rd_valid_for_clui(rd: u32) -> bool

Returns true if the rd register is valid for c.lui.

pub fn clui_rel_info() -> RelocationKindInfo

Returns the RelocationKindInfo to use when a HI20 relocation has been relaxed to c.lui.

Trait Implementations

impl Clone for RelaxationKind

fn clone(&self) -> RelaxationKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RelaxationKind

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

Formats the value using the given formatter.

impl PartialEq for RelaxationKind

fn eq(&self, other: &RelaxationKind) -> 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 Copy for RelaxationKind

impl Eq for RelaxationKind

impl StructuralPartialEq for RelaxationKind