1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
use crate::{integers::uint::*, traits::bits::Xor};
use snarkvm_fields::PrimeField;
use snarkvm_r1cs::{ConstraintSystem, SynthesisError};
macro_rules! uint_xor_impl {
($($gadget: ident),*) => ($(
impl<F: PrimeField> Xor<F> for $gadget {
fn xor<CS: ConstraintSystem<F>>(&self, mut cs: CS, other: &Self) -> Result<Self, SynthesisError> {
let new_value = match (self.value, other.value) {
(Some(a), Some(b)) => Some(a ^ b),
_ => None,
};
let bits = self
.bits
.iter()
.zip(other.bits.iter())
.enumerate()
.map(|(i, (a, b))| a.xor(cs.ns(|| format!("xor of bit_gadget {}", i)), b))
.collect::<Result<_, _>>()?;
Ok(Self {
bits,
negated: false,
value: new_value,
})
}
}
)*)
}
uint_xor_impl!(UInt8, UInt16, UInt32, UInt64, UInt128);