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Enable fixed point u128 (#6214)

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* Add fixed u128.

* remove move

* Change sat_from_integer impl.

* checked_pow is always positive

* Revert.

* rename fixed file

* Rename to FixedI

* rename fixed file

* Add newline.

* Use Multiplier in impls.

* Renames negate() to saturating_negate().

* Uncomment test.

* Add Signed to macro.

* Add some tests for Saturating trait.
This commit is contained in:
Marcio Diaz
2020-06-06 13:04:39 +02:00
committed by GitHub
parent 0761a8e0c3
commit 7c051caa42
11 changed files with 424 additions and 342 deletions
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substrate/primitives/arithmetic/src/lib.rs
+18 -2
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@@ -37,10 +37,10 @@ pub mod biguint;
pub mod helpers_128bit;
pub mod traits;
mod per_things;
mod fixed;
mod fixed_point;
mod rational128;
pub use fixed::{FixedPointNumber, Fixed64, Fixed128, FixedPointOperand};
pub use fixed_point::{FixedPointNumber, FixedPointOperand, FixedI64, FixedI128, FixedU128};
pub use per_things::{PerThing, InnerOf, Percent, PerU16, Permill, Perbill, Perquintill};
pub use rational128::Rational128;
@@ -88,6 +88,7 @@ where
#[cfg(test)]
mod tests {
use super::*;
use crate::traits::Saturating;
use sp_std::cmp::Ordering;
#[test]
@@ -131,4 +132,19 @@ mod tests {
// maximum capacity of their type, e.g. PerU16.
let _ = PerU16::from_rational_approximation(17424870u32, 17424870);
}
#[test]
fn saturating_mul_works() {
assert_eq!(Saturating::saturating_mul(2, i32::min_value()), i32::min_value());
assert_eq!(Saturating::saturating_mul(2, i32::max_value()), i32::max_value());
}
#[test]
fn saturating_pow_works() {
assert_eq!(Saturating::saturating_pow(i32::min_value(), 0), 1);
assert_eq!(Saturating::saturating_pow(i32::max_value(), 0), 1);
assert_eq!(Saturating::saturating_pow(i32::min_value(), 3), i32::min_value());
assert_eq!(Saturating::saturating_pow(i32::min_value(), 2), i32::max_value());
assert_eq!(Saturating::saturating_pow(i32::max_value(), 2), i32::max_value());
}
}