/// Trait to interact with immediate operands.
pub(crate) trait Imm {
/// Get immediate operand as slice of bytes.
fn bytes(&self) -> &[u8];
}
macro_rules! impl_imm {
($name:ident, $size:expr, from: $( $from:ty ),* $(,)?) => {
/// Immediate operand.
pub struct $name([u8; $size]);
impl Imm for $name {
/// Get immediate operand as slice of bytes.
fn bytes(&self) -> &[u8] {
&self.0
}
}
$(
impl From<$from> for $name {
fn from(imm: $from) -> Self {
let mut buf = [0u8; $size];
let imm = imm.to_ne_bytes();
buf[0..imm.len()].copy_from_slice(&imm);
$name(buf)
}
}
)*
}
}
impl_imm!(Imm8, 1, from: u8, i8);
impl_imm!(Imm16, 2, from: u16, i16, u8, i8);
impl_imm!(Imm32, 4, from: u32, i32, u16, i16, u8, i8);
impl_imm!(Imm64, 8, from: u64, i64, u32, i32, u16, i16, u8, i8);