Merge rust-num#173

173: Release 0.3.1 r=cuviper a=cuviper



Co-authored-by: Josh Stone <cuviper@gmail.com>

Cargo.toml

@@ -5,7 +5,7 @@ documentation = "https://docs.rs/num-bigint"
 homepage = "https://github.com/rust-num/num-bigint"
 keywords = ["mathematics", "numerics", "bignum"]
 categories = [ "algorithms", "data-structures", "science" ]
-license = "MIT/Apache-2.0"
+license = "MIT OR Apache-2.0"
 name = "num-bigint"
 repository = "https://github.com/rust-num/num-bigint"
 version = "0.3.1"

README.md

@@ -64,3 +64,18 @@ table offers a brief comparison to a few alternatives.
 [`rust-gmp`]: https://crates.io/crates/rust-gmp
 [`ramp`]: https://crates.io/crates/ramp
 [`apint`]: https://crates.io/crates/apint
+
+## License
+
+Licensed under either of
+
+ * [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)
+ * [MIT license](http://opensource.org/licenses/MIT)
+
+at your option.
+
+### Contribution
+
+Unless you explicitly state otherwise, any contribution intentionally submitted
+for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
+dual licensed as above, without any additional terms or conditions.

RELEASES.md

@@ -1,3 +1,25 @@
+# Release 0.3.1 (2020-11-03)
+
+- [Addition and subtraction now uses intrinsics][141] for performance on `x86`
+  and `x86_64` when built with Rust 1.33 or later.
+- [Conversions `to_f32` and `to_f64` now return infinity][163] for very large
+  numbers, rather than `None`. This does preserve the sign too, so a large
+  negative `BigInt` will convert to negative infinity.
+- [The optional `arbitrary` feature implements `arbitrary::Arbitrary`][166],
+  distinct from `quickcheck::Arbitrary`.
+- [The division algorithm has been optimized][170] to reduce the number of
+  temporary allocations and improve the internal guesses at each step.
+- [`BigInt` and `BigUint` will opportunistically shrink capacity][171] if the
+  internal vector is much larger than needed.
+
+**Contributors**: @cuviper, @e00E, @ejmahler, @notoria, @tczajka
+
+[141]: https://github.com/rust-num/num-bigint/pull/141
+[163]: https://github.com/rust-num/num-bigint/pull/163
+[166]: https://github.com/rust-num/num-bigint/pull/166
+[170]: https://github.com/rust-num/num-bigint/pull/170
+[171]: https://github.com/rust-num/num-bigint/pull/171
+
 # Release 0.3.0 (2020-06-12)
 
 ### Enhancements