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implement division and remainder operations

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Signed-off-by: xermicus <cyrill@parity.io>
This commit is contained in:
xermicus
2024-05-08 23:21:16 +02:00
parent 864e40901f
commit 6af889c1ff
6 changed files with 310 additions and 173 deletions
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crates/integration/src/tests.rs
+96
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@@ -296,3 +296,99 @@ fn caller() {
let expected = Address::from(&mock_runtime::State::CALLER);
assert_eq!(received, expected);
}
#[test]
fn unsigned_division() {
let one = U256::from(1);
let two = U256::from(2);
let five = U256::from(5);
for (n, d, q) in [
(five, five, one),
(five, one, five),
(U256::ZERO, U256::MAX, U256::ZERO),
(five, two, two),
(one, U256::ZERO, U256::ZERO),
] {
let state = assert_success(Contract::division_arithmetics_div(n, d), true);
let received = U256::from_be_bytes::<32>(state.output.data.try_into().unwrap());
assert_eq!(received, q);
}
}
#[test]
fn signed_division() {
let one = I256::try_from(1).unwrap();
let two = I256::try_from(2).unwrap();
let minus_two = I256::try_from(-2).unwrap();
let five = I256::try_from(5).unwrap();
let minus_five = I256::try_from(-5).unwrap();
for (n, d, q) in [
(five, five, one),
(five, one, five),
(I256::ZERO, I256::MAX, I256::ZERO),
(I256::ZERO, I256::MINUS_ONE, I256::ZERO),
(five, two, two),
(five, I256::MINUS_ONE, minus_five),
(I256::MINUS_ONE, minus_two, I256::ZERO),
(minus_five, minus_five, one),
(minus_five, two, minus_two),
(I256::MINUS_ONE, I256::MIN, I256::ZERO),
(one, I256::ZERO, I256::ZERO),
] {
let state = assert_success(Contract::division_arithmetics_sdiv(n, d), true);
let received = I256::from_be_bytes::<32>(state.output.data.try_into().unwrap());
assert_eq!(received, q);
}
}
#[test]
fn unsigned_remainder() {
let one = U256::from(1);
let two = U256::from(2);
let five = U256::from(5);
for (n, d, q) in [
(five, five, U256::ZERO),
(five, one, U256::ZERO),
(U256::ZERO, U256::MAX, U256::ZERO),
(U256::MAX, U256::MAX, U256::ZERO),
(five, two, one),
(two, five, two),
(U256::MAX, U256::ZERO, U256::ZERO),
] {
let state = assert_success(Contract::division_arithmetics_mod(n, d), true);
let received = U256::from_be_bytes::<32>(state.output.data.try_into().unwrap());
assert_eq!(received, q);
}
}
#[test]
fn signed_remainder() {
let one = I256::try_from(1).unwrap();
let two = I256::try_from(2).unwrap();
let minus_two = I256::try_from(-2).unwrap();
let five = I256::try_from(5).unwrap();
let minus_five = I256::try_from(-5).unwrap();
for (n, d, q) in [
(five, five, I256::ZERO),
(five, one, I256::ZERO),
(I256::ZERO, I256::MAX, I256::ZERO),
(I256::MAX, I256::MAX, I256::ZERO),
(five, two, one),
(two, five, two),
(five, minus_five, I256::ZERO),
(five, I256::MINUS_ONE, I256::ZERO),
(five, minus_two, one),
(minus_five, two, I256::MINUS_ONE),
(minus_two, five, minus_two),
(minus_five, minus_five, I256::ZERO),
(minus_five, I256::MINUS_ONE, I256::ZERO),
(minus_five, minus_two, I256::MINUS_ONE),
(minus_two, minus_five, minus_two),
(I256::MIN, I256::MINUS_ONE, I256::ZERO),
(I256::ZERO, I256::ZERO, I256::ZERO),
] {
let state = assert_success(Contract::division_arithmetics_smod(n, d), true);
let received = I256::from_be_bytes::<32>(state.output.data.try_into().unwrap());
assert_eq!(received, q);
}
}