# Changelog The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html). ## [Unreleased] ## [1.7.1] - 2021-01-17 ### Fixed - Docs.rs now generates docs for `bytemuck` and `num-traits` optional features. ## [1.7.0] - 2021-01-17 ### Added - Added optional implementations of `bytemuck` traits `Zeroable` and `Pod` under `bytemuck` cargo feature. By [@charles-r-earp]. - Added optional implementations of `num-traits` traits `ToPrimitive` and `FromPrimitive` under `num-traits` cargo feature. By [@charles-r-earp]. - Added implementations of `Binary`, `Octal`, `LowerHex`, and `UpperHex` string format traits to format raw `f16`/`bf16` bytes to string. ### Changed - `Debug` trait implementation now formats `f16`/`bf16` as float instead of raw bytes hex. Use newly implemented formatting traits to format in hex instead of `Debug`. Fixes [#37]. ## [1.6.0] - 2020-05-09 ### Added - Added `LOG2_10` and `LOG10_2` constants to both `f16` and `bf16`, which were added to `f32` and `f64` in the standard library in 1.43.0. By [@tspiteri]. - Added `to_le/be/ne_bytes` and `from_le/be/ne_bytes` to both `f16` and `bf16`, which were added to the standard library in 1.40.0. By [@bzm3r]. ## [1.5.0] - 2020-03-03 ### Added - Added the `alloc` feature to support the `alloc` crate in `no_std` environments. By [@zserik]. The `vec` module is now available with either `alloc` or `std` feature. ## [1.4.1] - 2020-02-10 ### Fixed - Added `#[repr(transparent)]` to `f16`/`bf16` to remove undefined behavior. By [@jfrimmel]. ## [1.4.0] - 2019-10-13 ### Added - Added a `bf16` type implementing the alternative [`bfloat16`](https://en.wikipedia.org/wiki/Bfloat16_floating-point_format) 16-bit floating point format. By [@tspiteri]. - `f16::from_bits`, `f16::to_bits`, `f16::is_nan`, `f16::is_infinite`, `f16::is_finite`, `f16::is_sign_positive`, and `f16::is_sign_negative` are now `const` fns. - `slice::HalfBitsSliceExt` and `slice::HalfBitsSliceExt` extension traits have been added for performing efficient reinterpret casts and conversions of slices to and from `[f16]` and `[bf16]`. These traits will use hardware SIMD conversion instructions when available and the `use-intrinsics` cargo feature is enabled. - `vec::HalfBitsVecExt` and `vec::HalfFloatVecExt` extension traits have been added for performing efficient reinterpret casts to and from `Vec` and `Vec`. These traits are only available with the `std` cargo feature. - `prelude` has been added, for easy importing of most common functionality. Currently the prelude imports `f16`, `bf16`, and the new slice and vec extension traits. - New associated constants on `f16` type to replace deprecated `consts` module. ### Fixed - Software conversion (when not using `use-intrinsics` feature) now matches hardware rounding by rounding to nearest, ties to even. Fixes [#24], by [@tspiteri]. - NaN value conversions now behave like `f32` to `f64` conversions, retaining sign. Fixes [#23], by [@tspiteri]. ### Changed - Minimum rustc version bumped to 1.32. - Runtime target host feature detection is now used if both `std` and `use-intrinsics` features are enabled and the compile target host does not support required features. - When `use-intrinsics` feature is enabled, will now always compile and run without error correctly regardless of compile target options. ### Deprecated - `consts` module and all its constants have been deprecated; use the associated constants on `f16` instead. - `slice::from_bits` has been deprecated; use `slice::HalfBitsSliceExt::reinterpret_cast` instead. - `slice::from_bits_mut` has been deprecated; use `slice::HalfBitsSliceExt::reinterpret_cast_mut` instead. - `slice::to_bits` has been deprecated; use `slice::HalfFloatSliceExt::reinterpret_cast` instead. - `slice::to_bits_mut` has been deprecated; use `slice::HalfFloatSliceExt::reinterpret_cast_mut` instead. - `vec::from_bits` has been deprecated; use `vec::HalfBitsVecExt::reinterpret_into` instead. - `vec::to_bits` has been deprecated; use `vec::HalfFloatVecExt::reinterpret_into` instead. ## [1.3.1] - 2019-10-04 ### Fixed - Corrected values of constants `EPSILON`, `MAX_10_EXP`, `MAX_EXP`, `MIN_10_EXP`, and `MIN_EXP` in `consts` module, as well as setting `consts::NAN` to match value of `f32::NAN` converted to `f16`. By [@tspiteri]. ## [1.3.0] - 2018-10-02 ### Added - `slice::from_bits_mut` and `slice::to_bits_mut` for conversion between mutable `u16` and `f16` slices. Fixes [#16], by [@johannesvollmer]. ## [1.2.0] - 2018-09-03 ### Added - `slice` and optional `vec` (only included with `std` feature) modules for conversions between `u16` and `f16` buffers. Fixes [#14], by [@johannesvollmer]. - `to_bits` added to replace `as_bits`. Fixes [#12], by [@tspiteri]. ### Fixed - `serde` optional dependency no longer uses its default `std` feature. ### Deprecated - `as_bits` has been deprecated; use `to_bits` instead. - `serialize` cargo feature is deprecated; use `serde` instead. ## [1.1.2] - 2018-07-12 ### Fixed - Fixed compilation error in 1.1.1 on rustc < 1.27, now compiles again on rustc >= 1.10. Fixes [#11]. ## [1.1.1] - 2018-06-24 - **Yanked** ### ***Yanked*** *Not recommended due to introducing compilation error on rustc versions prior to 1.27.* ### Fixed - Fix subnormal float conversions when `use-intrinsics` is not enabled. By [@Moongoodboy-K]. ## [1.1.0] - 2018-03-17 ### Added - Made `to_f32` and `to_f64` public. Fixes [#7], by [@PSeitz]. ## [1.0.2] - 2018-01-12 ### Changed - Update behavior of `is_sign_positive` and `is_sign_negative` to match the IEEE754 conforming behavior of the standard library since Rust 1.20.0. Fixes [#3], by [@tspiteri]. - Small optimization on `is_nan` and `is_infinite` from [@tspiteri]. ### Fixed - Fix comparisons of +0 to -0 and comparisons involving negative numbers. Fixes [#2], by [@tspiteri]. - Fix loss of sign when converting `f16` and `f32` to `f16`, and case where `f64` NaN could be converted to `f16` infinity instead of NaN. Fixes [#5], by [@tspiteri]. ## [1.0.1] - 2017-08-30 ### Added - More README documentation. - Badges and categories in crate metadata. ### Changed - `serde` dependency updated to 1.0 stable. - Writing changelog manually. ## [1.0.0] - 2017-02-03 ### Added - Update to `serde` 0.9 and stable Rust 1.15 for `serialize` feature. ## [0.1.1] - 2017-01-08 ### Added - Add `serde` support under new `serialize` feature. ### Changed - Use `no_std` for crate by default. ## 0.1.0 - 2016-03-17 ### Added - Initial release of `f16` type. [#2]: https://github.com/starkat99/half-rs/issues/2 [#3]: https://github.com/starkat99/half-rs/issues/3 [#5]: https://github.com/starkat99/half-rs/issues/5 [#7]: https://github.com/starkat99/half-rs/issues/7 [#11]: https://github.com/starkat99/half-rs/issues/11 [#12]: https://github.com/starkat99/half-rs/issues/12 [#14]: https://github.com/starkat99/half-rs/issues/14 [#16]: https://github.com/starkat99/half-rs/issues/16 [#23]: https://github.com/starkat99/half-rs/issues/23 [#24]: https://github.com/starkat99/half-rs/issues/24 [#37]: https://github.com/starkat99/half-rs/issues/37 [@tspiteri]: https://github.com/tspiteri [@PSeitz]: https://github.com/PSeitz [@Moongoodboy-K]: https://github.com/Moongoodboy-K [@johannesvollmer]: https://github.com/johannesvollmer [@jfrimmel]: https://github.com/jfrimmel [@zserik]: https://github.com/zserik [@bzm3r]: https://github.com/bzm3r [@charles-r-earp]: https://github.com/charles-r-earp [Unreleased]: https://github.com/starkat99/half-rs/compare/v1.7.1...HEAD [1.7.1]: https://github.com/starkat99/half-rs/compare/v1.7.0...v1.7.1 [1.7.0]: https://github.com/starkat99/half-rs/compare/v1.6.0...v1.7.0 [1.6.0]: https://github.com/starkat99/half-rs/compare/v1.5.0...v1.6.0 [1.5.0]: https://github.com/starkat99/half-rs/compare/v1.4.1...v1.5.0 [1.4.1]: https://github.com/starkat99/half-rs/compare/v1.4.0...v1.4.1 [1.4.0]: https://github.com/starkat99/half-rs/compare/v1.3.1...v1.4.0 [1.3.1]: https://github.com/starkat99/half-rs/compare/v1.3.0...v1.3.1 [1.3.0]: https://github.com/starkat99/half-rs/compare/v1.2.0...v1.3.0 [1.2.0]: https://github.com/starkat99/half-rs/compare/v1.1.2...v1.2.0 [1.1.2]: https://github.com/starkat99/half-rs/compare/v1.1.1...v1.1.2 [1.1.1]: https://github.com/starkat99/half-rs/compare/v1.1.0...v1.1.1 [1.1.0]: https://github.com/starkat99/half-rs/compare/v1.0.2...v1.1.0 [1.0.2]: https://github.com/starkat99/half-rs/compare/v1.0.1...v1.0.2 [1.0.1]: https://github.com/starkat99/half-rs/compare/v1.0.0...v1.0.1 [1.0.0]: https://github.com/starkat99/half-rs/compare/v0.1.1...v1.0.0 [0.1.1]: https://github.com/starkat99/half-rs/compare/v0.1.0...v0.1.1