Enum cranelift_codegen::isa::x64::encoding::rex::LegacyPrefixes

pub enum LegacyPrefixes {
    None,
    _66,
    _F0,
    _66F0,
    _F2,
    _F3,
    _66F3,
}

We may need to include one or more legacy prefix bytes before the REX prefix. This enum covers only the small set of possibilities that we actually need.

Variants

None

No prefix bytes.

_66

Operand Size Override – here, denoting “16-bit operation”.

_F0

The Lock prefix.

_66F0

Operand size override and Lock.

_F2

REPNE, but no specific meaning here – is just an opcode extension.

_F3

REP/REPE, but no specific meaning here – is just an opcode extension.

_66F3

Operand size override and same effect as F3.

Trait Implementations

impl Default for LegacyPrefixes

fn default() -> Self

Returns the “default value” for a type.