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use crate::cc::ConditionCode;
use crate::r#type::BitWidth;
use std::fmt::Debug;
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum Constant {
Bool(bool, BitWidth),
Int(u64, BitWidth),
}
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum Part<I>
where
I: Copy + Debug + Eq,
{
Instruction(I),
Constant(Constant),
ConditionCode(ConditionCode),
}
impl<I> From<Constant> for Part<I>
where
I: Copy + Debug + Eq,
{
#[inline]
fn from(c: Constant) -> Part<I> {
Part::Constant(c)
}
}
impl<I> From<ConditionCode> for Part<I>
where
I: Copy + Debug + Eq,
{
#[inline]
fn from(c: ConditionCode) -> Part<I> {
Part::ConditionCode(c)
}
}
macro_rules! accessors {
( $( $variant:ident , $result:ty , $getter:ident , $is:ident , $unwrap:ident ; )* ) => {
$(
#[inline]
#[allow(missing_docs)]
pub fn $getter(&self) -> Option<$result> {
match *self {
Self::$variant(x, ..) => Some(x),
_ => None
}
}
#[inline]
#[allow(missing_docs)]
pub fn $is(&self) -> bool {
self.$getter().is_some()
}
#[inline]
#[allow(missing_docs)]
pub fn $unwrap(&self) -> $result {
self.$getter().expect(concat!("failed to unwrap `", stringify!($variant), "`"))
}
)*
}
}
impl Constant {
pub fn as_int(&self) -> Option<u64> {
match *self {
Constant::Bool(..) => None,
Constant::Int(x, _) => Some(x),
}
}
pub fn as_bool(&self) -> Option<bool> {
match *self {
Constant::Bool(b, _) => Some(b),
Constant::Int(..) => None,
}
}
pub fn bit_width(&self, root_width: u8) -> u8 {
match *self {
Constant::Bool(_, w) | Constant::Int(_, w) => {
if let Some(w) = w.fixed_width() {
w
} else {
debug_assert!(w.is_polymorphic());
root_width
}
}
}
}
}
impl<I> Part<I>
where
I: Copy + Debug + Eq,
{
accessors! {
Instruction, I, as_instruction, is_instruction, unwrap_instruction;
Constant, Constant, as_constant, is_constant, unwrap_constant;
ConditionCode, ConditionCode, as_condition_code, is_condition_code, unwrap_condition_code;
}
}