158 lines
3.9 KiB
Rust
158 lines
3.9 KiB
Rust
/// Compute a + b + carry, returning the result and the new carry over.
|
|
#[inline(always)]
|
|
pub const fn adc(a: u64, b: u64, carry: u64) -> (u64, u64) {
|
|
let ret = (a as u128) + (b as u128) + (carry as u128);
|
|
(ret as u64, (ret >> 64) as u64)
|
|
}
|
|
|
|
/// Compute a - (b + borrow), returning the result and the new borrow.
|
|
#[inline(always)]
|
|
pub const fn sbb(a: u64, b: u64, borrow: u64) -> (u64, u64) {
|
|
let ret = (a as u128).wrapping_sub((b as u128) + ((borrow >> 63) as u128));
|
|
(ret as u64, (ret >> 64) as u64)
|
|
}
|
|
|
|
/// Compute a + (b * c) + carry, returning the result and the new carry over.
|
|
#[inline(always)]
|
|
pub const fn mac(a: u64, b: u64, c: u64, carry: u64) -> (u64, u64) {
|
|
let ret = (a as u128) + ((b as u128) * (c as u128)) + (carry as u128);
|
|
(ret as u64, (ret >> 64) as u64)
|
|
}
|
|
|
|
macro_rules! impl_binops_additive {
|
|
($lhs:ident, $rhs:ident) => {
|
|
impl<'b> Sub<&'b $rhs> for $lhs {
|
|
type Output = $lhs;
|
|
|
|
#[inline]
|
|
fn sub(self, rhs: &'b $rhs) -> $lhs {
|
|
&self - rhs
|
|
}
|
|
}
|
|
|
|
impl<'b> Add<&'b $rhs> for $lhs {
|
|
type Output = $lhs;
|
|
|
|
#[inline]
|
|
fn add(self, rhs: &'b $rhs) -> $lhs {
|
|
&self + rhs
|
|
}
|
|
}
|
|
|
|
impl<'a> Sub<$rhs> for &'a $lhs {
|
|
type Output = $lhs;
|
|
|
|
#[inline]
|
|
fn sub(self, rhs: $rhs) -> $lhs {
|
|
self - &rhs
|
|
}
|
|
}
|
|
|
|
impl<'a> Add<$rhs> for &'a $lhs {
|
|
type Output = $lhs;
|
|
|
|
#[inline]
|
|
fn add(self, rhs: $rhs) -> $lhs {
|
|
self + &rhs
|
|
}
|
|
}
|
|
|
|
impl Sub<$rhs> for $lhs {
|
|
type Output = $lhs;
|
|
|
|
#[inline]
|
|
fn sub(self, rhs: $rhs) -> $lhs {
|
|
&self - &rhs
|
|
}
|
|
}
|
|
|
|
impl Add<$rhs> for $lhs {
|
|
type Output = $lhs;
|
|
|
|
#[inline]
|
|
fn add(self, rhs: $rhs) -> $lhs {
|
|
&self + &rhs
|
|
}
|
|
}
|
|
|
|
impl SubAssign<$rhs> for $lhs {
|
|
#[inline]
|
|
fn sub_assign(&mut self, rhs: $rhs) {
|
|
*self = &*self - &rhs;
|
|
}
|
|
}
|
|
|
|
impl AddAssign<$rhs> for $lhs {
|
|
#[inline]
|
|
fn add_assign(&mut self, rhs: $rhs) {
|
|
*self = &*self + &rhs;
|
|
}
|
|
}
|
|
|
|
impl<'b> SubAssign<&'b $rhs> for $lhs {
|
|
#[inline]
|
|
fn sub_assign(&mut self, rhs: &'b $rhs) {
|
|
*self = &*self - rhs;
|
|
}
|
|
}
|
|
|
|
impl<'b> AddAssign<&'b $rhs> for $lhs {
|
|
#[inline]
|
|
fn add_assign(&mut self, rhs: &'b $rhs) {
|
|
*self = &*self + rhs;
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
macro_rules! impl_binops_multiplicative_mixed {
|
|
($lhs:ident, $rhs:ident, $output:ident) => {
|
|
impl<'b> Mul<&'b $rhs> for $lhs {
|
|
type Output = $output;
|
|
|
|
#[inline]
|
|
fn mul(self, rhs: &'b $rhs) -> $output {
|
|
&self * rhs
|
|
}
|
|
}
|
|
|
|
impl<'a> Mul<$rhs> for &'a $lhs {
|
|
type Output = $output;
|
|
|
|
#[inline]
|
|
fn mul(self, rhs: $rhs) -> $output {
|
|
self * &rhs
|
|
}
|
|
}
|
|
|
|
impl Mul<$rhs> for $lhs {
|
|
type Output = $output;
|
|
|
|
#[inline]
|
|
fn mul(self, rhs: $rhs) -> $output {
|
|
&self * &rhs
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
macro_rules! impl_binops_multiplicative {
|
|
($lhs:ident, $rhs:ident) => {
|
|
impl_binops_multiplicative_mixed!($lhs, $rhs, $lhs);
|
|
|
|
impl MulAssign<$rhs> for $lhs {
|
|
#[inline]
|
|
fn mul_assign(&mut self, rhs: $rhs) {
|
|
*self = &*self * &rhs;
|
|
}
|
|
}
|
|
|
|
impl<'b> MulAssign<&'b $rhs> for $lhs {
|
|
#[inline]
|
|
fn mul_assign(&mut self, rhs: &'b $rhs) {
|
|
*self = &*self * rhs;
|
|
}
|
|
}
|
|
};
|
|
}
|