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//! Bitwise OR via the [`BitOr`] trait.
use super::U512;
use core::ops::BitOr;
/// Computes the bitwise OR of two 512-bit integers, producing a
/// result where each bit is set if either corresponding input bit
/// is set.
///
/// Applied independently to each of the eight `u64` limbs.
///
/// # Examples
///
/// ```
/// use cnfy_uint::u512::U512;
///
/// let a = U512::from_be_limbs([0, 0, 0, 0, 0, 0, 0, 0xF0]);
/// let b = U512::from_be_limbs([0, 0, 0, 0, 0, 0, 0, 0x0F]);
/// assert_eq!(a | b, U512::from_be_limbs([0, 0, 0, 0, 0, 0, 0, 0xFF]));
/// ```
impl BitOr for U512 {
type Output = U512;
#[inline]
fn bitor(self, rhs: U512) -> U512 {
U512([
self.0[0] | rhs.0[0],
self.0[1] | rhs.0[1],
self.0[2] | rhs.0[2],
self.0[3] | rhs.0[3],
self.0[4] | rhs.0[4],
self.0[5] | rhs.0[5],
self.0[6] | rhs.0[6],
self.0[7] | rhs.0[7],
])
}
}
#[cfg(test)]
mod ai_tests {
use super::*;
/// OR with self is identity.
#[test]
fn self_identity() {
let a = U512::from_be_limbs([0x1234, 0x5678, 0x9ABC, 0xDEF0, 1, 2, 3, 4]);
assert_eq!(a | a, a);
}
/// OR with zero is identity.
#[test]
fn or_zero() {
let a = U512::from_be_limbs([0x1234, 0x5678, 0x9ABC, 0xDEF0, 1, 2, 3, 4]);
assert_eq!(a | U512::ZERO, a);
}
/// OR with MAX is MAX.
#[test]
fn or_max() {
let a = U512::from_be_limbs([0x1234, 0x5678, 0x9ABC, 0xDEF0, 1, 2, 3, 4]);
assert_eq!(a | U512::MAX, U512::MAX);
}
/// OR combines disjoint bits.
#[test]
fn disjoint_bits() {
let a = U512::from_be_limbs([0, 0, 0, 0, 0, 0, 0, 0xF0]);
let b = U512::from_be_limbs([0, 0, 0, 0, 0, 0, 0, 0x0F]);
assert_eq!(a | b, U512::from_be_limbs([0, 0, 0, 0, 0, 0, 0, 0xFF]));
}
/// OR is commutative.
#[test]
fn commutative() {
let a = U512::from_be_limbs([1, 2, 3, 4, 5, 6, 7, 8]);
let b = U512::from_be_limbs([8, 7, 6, 5, 4, 3, 2, 1]);
assert_eq!(a | b, b | a);
}
}