Enum LegacyPrefix

pub enum LegacyPrefix {
    NoPrefix,
    _66,
    _F0,
    _66F0,
    _F2,
    _F3,
    _66F3,
}

A prefix byte for an instruction.

Variants

NoPrefix

No prefix bytes.

_66

An operand size override typically denoting “16-bit operation” or “SSE instructions”. But the reference manual is more nuanced:

The operand-size override prefix allows a program to switch between 16- and 32-bit operand sizes. Either size can be the default; use of the prefix selects the non-default. Some SSE2/SSE3/SSSE3/SSE4 instructions and instructions using a three-byte sequence of primary opcode bytes may use 66H as a mandatory prefix to express distinct functionality.

_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.

Implementations

impl LegacyPrefix

pub fn contains_66(&self) -> bool

Trait Implementations

impl PartialEq for LegacyPrefix

fn eq(&self, other: &LegacyPrefix) -> 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 TryFrom<u8> for LegacyPrefix

type Error = u8

The type returned in the event of a conversion error.

fn try_from(byte: u8) -> Result<Self, Self::Error>

Performs the conversion.

impl StructuralPartialEq for LegacyPrefix