Enum LabelUse

pub enum LabelUse {
    Branch14,
    Branch19,
    Branch26,
    Ldr19,
    Adr21,
    PCRel32,
}

Different forms of label references for different instruction formats.

Variants

Branch14

14-bit branch offset (conditional branches). PC-rel, offset is imm << 2. Immediate is 14 signed bits, in bits 18:5. Used by tbz and tbnz.

Branch19

19-bit branch offset (conditional branches). PC-rel, offset is imm << 2. Immediate is 19 signed bits, in bits 23:5. Used by cbz, cbnz, b.cond.

Branch26

26-bit branch offset (unconditional branches). PC-rel, offset is imm << 2. Immediate is 26 signed bits, in bits 25:0. Used by b, bl.

Ldr19

19-bit offset for LDR (load literal). PC-rel, offset is imm << 2. Immediate is 19 signed bits, in bits 23:5.

Adr21

21-bit offset for ADR (get address of label). PC-rel, offset is not shifted. Immediate is 21 signed bits, with high 19 bits in bits 23:5 and low 2 bits in bits 30:29.

PCRel32

32-bit PC relative constant offset (from address of constant itself), signed. Used in jump tables.

Trait Implementations

impl Clone for LabelUse

fn clone(&self) -> LabelUse

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for LabelUse

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

Formats the value using the given formatter.

impl PartialEq for LabelUse

fn eq(&self, other: &LabelUse) -> 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 LabelUse

impl Eq for LabelUse

impl StructuralPartialEq for LabelUse