# Changelog

All notable changes to this project will be documented in this file.

This project adheres to [Semantic Versioning](https://semver.org).

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## [Unreleased]

## [1.4.3] - 2023-08-25

- Optimize AArch64 128-bit atomic store/swap/fetch_and/fetch_or when the `lse128` target feature is enabled at compile-time. ([#68](https://github.com/taiki-e/portable-atomic/pull/68))

- Optimize AArch64 128-bit atomic load/store when the `rcpc3` target feature is enabled at compile-time. ([#68](https://github.com/taiki-e/portable-atomic/pull/68))

- Optimize inline assemblies on ARM, AArch64, and MSP430.

## [1.4.2] - 2023-07-27

- Optimize `AtomicBool` on RISC-V/LoongArch64. This is the same as [rust-lang/rust#114034](https://github.com/rust-lang/rust/pull/114034), but is available for all rustc versions.

## [1.4.1] - 2023-07-15

- Improve compatibility with the future version of Miri.

## [1.4.0] - 2023-07-11

- Allow using embedded-related cfgs as Cargo features. ([#94](https://github.com/taiki-e/portable-atomic/pull/94), thanks @Dirbaio)

  Originally, we were providing these as cfgs instead of features, but based on a strong request from the embedded ecosystem, we have agreed to provide them as features as well. See [#94](https://github.com/taiki-e/portable-atomic/pull/94) for more.

  cfgs are kept and can be used as aliases for features.

- Acknowledge all x86_64 Apple targets support 128-bit atomics.

  Our code already recognizes this via `cfg(target_feature)`, so this only affects docs and users using pre-1.69 stable rustc.

  See also [rust-lang/rust#112150](https://github.com/rust-lang/rust/pull/112150).

- Optimize 128-bit atomics on aarch64/s390x.

## [1.3.3] - 2023-05-31

- Fix build error on aarch64 ILP32 ABI targets (tier 3).

- Optimize 128-bit atomics on s390x.

## [1.3.2] - 2023-05-09

- Fix bug in powerpc64/s390x 128-bit atomic RMWs on old nightly.

- Optimize 128-bit atomics on powerpc64/s390x.

## [1.3.1] - 2023-05-07

- Documentation improvements.

## [1.3.0] - 2023-05-06

- Add `require-cas` feature. ([#100](https://github.com/taiki-e/portable-atomic/pull/100))

  If your crate supports no-std environment and requires atomic CAS, enabling this feature will allow the `portable-atomic` to display helpful error messages to users on targets requiring additional action on the user side to provide atomic CAS.

  ```toml
  [dependencies]
  portable-atomic = { version = "1.3", default-features = false, features = ["require-cas"] }
  ```

  See [#100](https://github.com/taiki-e/portable-atomic/pull/100) for more.

- Support `portable_atomic_unsafe_assume_single_core` cfg on Xtensa targets without atomic CAS. ([#86](https://github.com/taiki-e/portable-atomic/pull/86))

- Fix bug in AArch64 128-bit SeqCst load when FEAT_LSE2 is enabled at compile-time. This is [the same bug that was fixed in the recently released GCC 13.1](https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108891). LLVM also has the same bug, which had not yet been fixed when the patch was created; I will open a bug report if necessary after looking into the situation in LLVM. ([a29154b](https://github.com/taiki-e/portable-atomic/commit/a29154b21da270e90cb86f6865b591ab36eade7d))

- Fix compile error on `bpf{eb,el}-unknown-none` (tier 3) and `mipsel-sony-psx` (tier 3) when `critical-section` feature is disabled.

- Various optimizations
  - Optimize x86_64 128-bit outline-atomics. This improves performance by up to 15% in concurrent RMW/store for cases where the `cmpxchg16b` target feature is not available at compile-time. ([40c4cd4](https://github.com/taiki-e/portable-atomic/commit/40c4cd4f682f1cb153f18d4d6a88795bafaf5667))
  - Optimize x86_64 128-bit load that uses cmpxchg16b. ([40c4cd4](https://github.com/taiki-e/portable-atomic/commit/40c4cd4f682f1cb153f18d4d6a88795bafaf5667))
  - Optimize aarch64 128-bit load that uses FEAT_LSE. ([40c4cd4](https://github.com/taiki-e/portable-atomic/commit/40c4cd4f682f1cb153f18d4d6a88795bafaf5667))
  - Optimize pre-ARMv6 Linux/Android atomics. ([efacc89](https://github.com/taiki-e/portable-atomic/commit/efacc89c210d7a34ef5e879821112189da5d1901))
  - Support outline-atomics for powerpc64 128-bit atomics. This is currently disabled by default, and can be enabled by `--cfg portable_atomic_outline_atomics`. ([#90](https://github.com/taiki-e/portable-atomic/pull/90))
  - Optimize aarch64 outline-atomics on linux-musl. On linux-musl, outline-atomics is enabled by default only when dynamic linking is enabled. When static linking is enabled, this can be enabled by `--cfg portable_atomic_outline_atomics`. See the [`atomic128` module's readme](https://github.com/taiki-e/portable-atomic/blob/HEAD/src/imp/atomic128/README.md#run-time-feature-detection) for more. ([8418235](https://github.com/taiki-e/portable-atomic/commit/84182354e4a149074e28bda4683d538e5fb617ce), [31d0862](https://github.com/taiki-e/portable-atomic/commit/31d08623d4e21af207ff2343f5553b9b5a030452))

## [1.2.0] - 2023-03-25

- Make 64-bit atomics lock-free on ARM Linux/Android targets that do not have 64-bit atomics (e.g., armv5te-unknown-linux-gnueabi, arm-linux-androideabi, etc.) when the kernel version is 3.1 or later. ([#82](https://github.com/taiki-e/portable-atomic/pull/82))

- Fix aarch64 128-bit atomics performance regression on Apple hardware. ([#89](https://github.com/taiki-e/portable-atomic/pull/89))

- Optimize 128-bit atomics on aarch64, x86_64, powerpc64, and s390x.

## [1.1.0] - 2023-03-24

- Add `Atomic{I,U}*::bit_{set,clear,toggle}` and `AtomicPtr::bit_{set,clear,toggle}`. ([#72](https://github.com/taiki-e/portable-atomic/pull/72))

  They correspond to x86's `lock bt{s,r,c}`, and the implementation calls them on x86/x86_64.

- Add `AtomicU*::{fetch_neg,neg}` methods. Previously it was only available on `AtomicI*` and `AtomicF*`.

- Add `as_ptr` method to all atomic types. ([#79](https://github.com/taiki-e/portable-atomic/pull/79))

- Make `AtomicF{32,64}::as_bits` const on Rust 1.58+. ([#79](https://github.com/taiki-e/portable-atomic/pull/79))

- Relax ordering in `Serialize` impl to reflect the [upstream change](https://github.com/serde-rs/serde/pull/2263).

- Optimize x86_64 outline-atomics for 128-bit atomics.
  - Support outline-atomics for cmpxchg16b on Rust 1.69+ (i.e., on Rust 1.69+, x86_64 128-bit atomics is lock-free on all Intel chips and almost all AMD chips, even if cmpxchg16b is not available at compile-time.). Previously it was only nightly. ([#80](https://github.com/taiki-e/portable-atomic/pull/80))
  - portable-atomic no longer enables outline-atomics on target where run-time feature detection is not available. ([#80](https://github.com/taiki-e/portable-atomic/pull/80))

- Optimize aarch64 outline-atomics for 128-bit atomics.
  - Support more targets and improve performance. ([#63](https://github.com/taiki-e/portable-atomic/pull/63), [#64](https://github.com/taiki-e/portable-atomic/pull/64), [#67](https://github.com/taiki-e/portable-atomic/pull/67), [#69](https://github.com/taiki-e/portable-atomic/pull/69), [#75](https://github.com/taiki-e/portable-atomic/pull/75), [#76](https://github.com/taiki-e/portable-atomic/pull/76), [#77](https://github.com/taiki-e/portable-atomic/pull/77))
    See the [`atomic128` module's readme](https://github.com/taiki-e/portable-atomic/blob/HEAD/src/imp/atomic128/README.md#run-time-feature-detection) for a list of platforms that support outline-atomics.
    Most of these improvements have already been [submitted and accepted in rust-lang/stdarch](https://github.com/rust-lang/stdarch/pulls?q=is%3Apr+author%3Ataiki-e+std_detect) and will soon be available in `std::arch::is_aarch64_feature_detected`.
  - portable-atomic no longer enables outline-atomics on target where run-time feature detection is not available.

- Performance improvements. ([#70](https://github.com/taiki-e/portable-atomic/pull/70), [#81](https://github.com/taiki-e/portable-atomic/pull/81), [6c189ae](https://github.com/taiki-e/portable-atomic/commit/6c189ae1792ce0c08b4f56b6e6c256c223475ce2), [13c92b0](https://github.com/taiki-e/portable-atomic/commit/13c92b015a8e8646a4b885229157547354d03b9e), etc.)

- Improve support for old nightly. ([#73](https://github.com/taiki-e/portable-atomic/pull/73), [872feb9](https://github.com/taiki-e/portable-atomic/commit/872feb9d7f3a4ca7cf9b63935265d46498fcae99))

- Documentation improvements.

## [1.0.1] - 2023-01-21

- Optimize `Atomic{I,U}*::{fetch_not,not}` methods. ([#62](https://github.com/taiki-e/portable-atomic/pull/62))

## [1.0.0] - 2023-01-15

- Add `critical-section` feature to use [critical-section](https://github.com/rust-embedded/critical-section) on targets where atomic CAS is not natively available. ([#51](https://github.com/taiki-e/portable-atomic/pull/51), thanks @Dirbaio)

  This is useful to get atomic CAS when `--cfg portable_atomic_unsafe_assume_single_core` can't be used, such as multi-core targets, unprivileged code running under some RTOS, or environments where disabling interrupts needs extra care due to e.g. real-time requirements.

  See [documentation](https://github.com/taiki-e/portable-atomic#optional-features-critical-section) for more.

- Remove `outline-atomics` feature. This was no-op since 0.3.19.

- Documentation improvements.

## [0.3.20] - 2023-05-07

The latest version of portable-atomic is 1.x. This release makes portable-atomic 0.3 is built on top of portable-atomic 1.x to make bug fixes and improvements such as [support for new targets](https://github.com/taiki-e/portable-atomic/pull/86) in 1.x available to the ecosystem that depends on older portable-atomic. portable-atomic 0.3 is still maintained passively, but upgrading to portable-atomic 1.x is recommended. (There are no breaking changes from 0.3, except that a deprecated no-op `outline-atomics` Cargo feature has been removed.) ([#99](https://github.com/taiki-e/portable-atomic/pull/99))

## [0.3.19] - 2022-12-25

- Add `AtomicI*::{fetch_neg,neg}` and `AtomicF*::fetch_neg` methods. ([#54](https://github.com/taiki-e/portable-atomic/pull/54))

  `AtomicI*::neg` are equivalent to the corresponding `fetch_*` methods, but do not return the previous value. They are intended for optimization on platforms that have atomic instructions for the corresponding operation, such as x86's `lock neg`.

  Currently, optimizations by these methods (`neg`) are only guaranteed for x86/x86_64.

- Add `Atomic{I,U}*::{fetch_not,not}` methods. ([#54](https://github.com/taiki-e/portable-atomic/pull/54))

  `Atomic{I,U}*::not` are equivalent to the corresponding `fetch_*` methods, but do not return the previous value. They are intended for optimization on platforms that have atomic instructions for the corresponding operation, such as x86's `lock not`, MSP430's `inv`.

  Currently, optimizations by these methods (`not`) are only guaranteed for x86/x86_64 and MSP430.

  (Note: `AtomicBool` already has `fetch_not` and `not` methods.)

- Enable outline-atomics for 128-bit atomics by default. ([#57](https://github.com/taiki-e/portable-atomic/pull/57)) See [#57](https://github.com/taiki-e/portable-atomic/pull/57) for more.

- Improve support for old nightly compilers.

## [0.3.18] - 2022-12-15

- Fix build error when not using `portable_atomic_unsafe_assume_single_core` cfg on AVR and MSP430 custom targets. ([#50](https://github.com/taiki-e/portable-atomic/pull/50))

  Since 0.3.11, atomic CAS was supported without the cfg on AVR and MSP430 builtin targets, but that change was not applied to custom targets.

## [0.3.17] - 2022-12-14

- Optimize x86_64 128-bit atomic load/store on AMD CPU with AVX. ([#49](https://github.com/taiki-e/portable-atomic/pull/49))

- Improve support for custom targets on old rustc.

## [0.3.16] - 2022-12-09

- Add `Atomic{I,U}*::{add,sub,and,or,xor}` and `AtomicBool::{and,or,xor}` methods. ([#47](https://github.com/taiki-e/portable-atomic/pull/47))

  They are equivalent to the corresponding `fetch_*` methods, but do not return the previous value. They are intended for optimization on platforms that implement atomics using inline assembly, such as the MSP430.

  Currently, optimizations by these methods (`add`,`sub`,`and`,`or`,`xor`) are only guaranteed for MSP430; on x86/x86_64, LLVM can optimize in most cases, so cases, where this would improve things, should be rare.

- Various improvements to `portable_atomic_unsafe_assume_single_core` cfg. ([#44](https://github.com/taiki-e/portable-atomic/pull/44), [#40](https://github.com/taiki-e/portable-atomic/pull/40))

  - Support disabling FIQs on pre-v6 ARM under `portable_atomic_disable_fiq` cfg.
  - Support RISC-V supervisor mode under `portable_atomic_s_mode` cfg.
  - Optimize interrupt restore on AVR and MSP430. ([#40](https://github.com/taiki-e/portable-atomic/pull/40))
  - Documentation improvements.

  See [#44](https://github.com/taiki-e/portable-atomic/pull/44) for more.

## [0.3.15] - 2022-09-09

- Implement workaround for std cpuid bug due to LLVM bug ([rust-lang/rust#101346](https://github.com/rust-lang/rust/issues/101346), [llvm/llvm-project#57550](https://github.com/llvm/llvm-project/issues/57550)).

  - Our use case is likely not affected, but we implement this just in case.
  - We've confirmed that the uses of inline assembly in this crate are not affected by this LLVM bug.

## [0.3.14] - 2022-09-04

- Optimize atomic load/store on no-std pre-v6 ARM when `portable_atomic_unsafe_assume_single_core` cfg is used. ([#36](https://github.com/taiki-e/portable-atomic/pull/36))

- Support pre-power8 powerpc64le. powerpc64le's default cpu version is power8, but you can technically compile it for the old cpu using the unsafe `-C target-cpu` rustc flag.

## [0.3.13] - 2022-08-15

- Use track_caller when debug assertions are enabled on Rust 1.46+.

- Make powerpc64 128-bit atomics compatible with Miri and ThreadSanitizer on LLVM 15+.

- Document that 128-bit atomics are compatible with Miri and ThreadSanitizer on recent nightly.

## [0.3.12] - 2022-08-13

- Support atomic CAS on no-std pre-v6 ARM targets (e.g., thumbv4t-none-eabi) under unsafe cfg `portable_atomic_unsafe_assume_single_core`. ([#28](https://github.com/taiki-e/portable-atomic/pull/28))

## [0.3.11] - 2022-08-12

- Always provide atomic CAS for MSP430 and AVR. ([#31](https://github.com/taiki-e/portable-atomic/pull/31))

  This previously required unsafe cfg `portable_atomic_unsafe_assume_single_core`, but since all MSP430 and AVR are single-core, we can safely provide atomic CAS based on disabling interrupts.

- Support `fence` and `compiler_fence` on MSP430. (On MSP430, the standard library's fences are currently unavailable due to LLVM errors.)

- Update safety requirements for unsafe cfg `portable_atomic_unsafe_assume_single_core` to mention use of privileged instructions to disable interrupts.

- Atomic operations based on disabling interrupts on single-core systems are now considered lock-free.

  The previous behavior was inconsistent because we consider the pre-v6 ARM Linux's atomic operations provided in a similar way by the Linux kernel to be lock-free.

- Respect `-Z allow-features`.

## [0.3.10] - 2022-08-03

- Optimize AArch64 128-bit atomic load when the `lse` target feature is enabled at compile-time. ([#20](https://github.com/taiki-e/portable-atomic/pull/20))

## [0.3.9] - 2022-08-03

- Fix build error on old Miri.

- Documentation improvements.

## [0.3.8] - 2022-08-02

- Make AArch64 and s390x 128-bit atomics compatible with Miri and ThreadSanitizer.

## [0.3.7] - 2022-07-31

- Provide stable equivalent of [`#![feature(strict_provenance_atomic_ptr)]`](https://github.com/rust-lang/rust/issues/99108). ([#23](https://github.com/taiki-e/portable-atomic/pull/23))

  - `AtomicPtr::fetch_ptr_{add,sub}`
  - `AtomicPtr::fetch_byte_{add,sub}`
  - `AtomicPtr::fetch_{or,and,xor}`

  These APIs are compatible with strict-provenance on `cfg(miri)`. Otherwise, they are compatible with permissive-provenance.
  Once `#![feature(strict_provenance_atomic_ptr)]` is stabilized, these APIs will be strict-provenance compatible in all cases from the version in which it is stabilized.

- Provide stable equivalent of [`#![feature(atomic_bool_fetch_not)]`](https://github.com/rust-lang/rust/issues/98485). ([#24](https://github.com/taiki-e/portable-atomic/pull/24))

  - `AtomicBool::fetch_not`

- Optimize x86_64 128-bit RMWs. ([#22](https://github.com/taiki-e/portable-atomic/pull/22))

- Optimize x86_64 outline-atomics.

- Optimize inline assemblies on ARM and AArch64.

- Revert [thumbv6m atomic load/store changes made in 0.3.5](https://github.com/taiki-e/portable-atomic/pull/18). This is because [rust-lang/rust#99595](https://github.com/rust-lang/rust/pull/99595) has been reverted, so this is no longer needed.

## [0.3.6] - 2022-07-26

- Fix build failure due to the existence of the `specs` directory.

- Documentation improvements.

- Optimize inline assemblies on x86_64, RISC-V, and MSP430.

## [0.3.5] - 2022-07-23

**Note:** This release has been yanked due to a bug fixed in 0.3.6.

- Provide thumbv6m atomic load/store which is planned to be removed from the standard library in [rust-lang/rust#99595](https://github.com/rust-lang/rust/pull/99595). ([#18](https://github.com/taiki-e/portable-atomic/pull/18))

- Optimize inline assemblies on AArch64, RISC-V, and powerpc64.

## [0.3.4] - 2022-06-25

- Optimize x86_64 128-bit atomic store.

## [0.3.3] - 2022-06-24

- Allow CAS failure ordering stronger than success ordering. ([#17](https://github.com/taiki-e/portable-atomic/pull/17))

## [0.3.2] - 2022-06-19

- Optimize x86_64 128-bit atomic load/store on Intel CPU with AVX. ([#16](https://github.com/taiki-e/portable-atomic/pull/16))

- Support native 128-bit atomic operations for powerpc64 (le or pwr8+, currently nightly-only).

- Fix behavior differences between stable and nightly. ([#15](https://github.com/taiki-e/portable-atomic/pull/15))

## [0.3.1] - 2022-06-16

- Optimize AArch64 128-bit atomic load/store when the `lse2` target feature is enabled at compile-time. ([#11](https://github.com/taiki-e/portable-atomic/pull/11))

- Relax ordering in `Debug` impl to reflect std changes. ([#12](https://github.com/taiki-e/portable-atomic/pull/12))

## [0.3.0] - 2022-03-25

- Support native 128-bit atomic operations for s390x (currently nightly-only).

- Add `AtomicF{32,64}::fetch_abs`.

- Add `#[must_use]` to constructors.

- Use 128-bit atomic operation mappings same as LLVM on AArch64.

- Remove `parking_lot` optional feature to allow the use of this crate within global allocators.

## [0.2.1] - 2022-03-17

- Implement AArch64 outline-atomics.

## [0.2.0] - 2022-03-10

- Remove `i128` feature. `Atomic{I,U}128` are now always enabled.

- Add `outline-atomics` feature. Currently, this is the same as the 0.1's `i128-dynamic`, except that `fallback` feature is not implicitly enabled.

- Remove `i128-dynamic` feature in favor of `outline-atomics` feature.

- Add `AtomicF{32,64}::as_bits`.

## [0.1.4] - 2022-03-02

- Support native 128-bit atomic operations for AArch64 at Rust 1.59+. This was previously supported only on nightly. ([#6](https://github.com/taiki-e/portable-atomic/pull/6))

## [0.1.3] - 2022-02-28

- Fix inline assembly for RISC-V without A-extension.

## [0.1.2] - 2022-02-26

**Note:** This release has been yanked due to a bug fixed in 0.1.3.

- Add `parking_lot` feature to use parking_lot in global locks of fallback implementation.

- Fix bug in cmpxchg16b support. ([#5](https://github.com/taiki-e/portable-atomic/pull/5))

## [0.1.1] - 2022-02-25

**Note:** This release has been yanked due to a bug fixed in 0.1.3.

- Fix doc cfg on `Atomic{I,U}128`.

## [0.1.0] - 2022-02-24

**Note:** This release has been yanked due to a bug fixed in 0.1.3.

Initial release

[Unreleased]: https://github.com/taiki-e/portable-atomic/compare/v1.4.3...HEAD
[1.4.3]: https://github.com/taiki-e/portable-atomic/compare/v1.4.2...v1.4.3
[1.4.2]: https://github.com/taiki-e/portable-atomic/compare/v1.4.1...v1.4.2
[1.4.1]: https://github.com/taiki-e/portable-atomic/compare/v1.4.0...v1.4.1
[1.4.0]: https://github.com/taiki-e/portable-atomic/compare/v1.3.3...v1.4.0
[1.3.3]: https://github.com/taiki-e/portable-atomic/compare/v1.3.2...v1.3.3
[1.3.2]: https://github.com/taiki-e/portable-atomic/compare/v1.3.1...v1.3.2
[1.3.1]: https://github.com/taiki-e/portable-atomic/compare/v1.3.0...v1.3.1
[1.3.0]: https://github.com/taiki-e/portable-atomic/compare/v1.2.0...v1.3.0
[1.2.0]: https://github.com/taiki-e/portable-atomic/compare/v1.1.0...v1.2.0
[1.1.0]: https://github.com/taiki-e/portable-atomic/compare/v1.0.1...v1.1.0
[1.0.1]: https://github.com/taiki-e/portable-atomic/compare/v1.0.0...v1.0.1
[1.0.0]: https://github.com/taiki-e/portable-atomic/compare/v0.3.19...v1.0.0
[0.3.20]: https://github.com/taiki-e/portable-atomic/compare/v0.3.19...v0.3.20
[0.3.19]: https://github.com/taiki-e/portable-atomic/compare/v0.3.18...v0.3.19
[0.3.18]: https://github.com/taiki-e/portable-atomic/compare/v0.3.17...v0.3.18
[0.3.17]: https://github.com/taiki-e/portable-atomic/compare/v0.3.16...v0.3.17
[0.3.16]: https://github.com/taiki-e/portable-atomic/compare/v0.3.15...v0.3.16
[0.3.15]: https://github.com/taiki-e/portable-atomic/compare/v0.3.14...v0.3.15
[0.3.14]: https://github.com/taiki-e/portable-atomic/compare/v0.3.13...v0.3.14
[0.3.13]: https://github.com/taiki-e/portable-atomic/compare/v0.3.12...v0.3.13
[0.3.12]: https://github.com/taiki-e/portable-atomic/compare/v0.3.11...v0.3.12
[0.3.11]: https://github.com/taiki-e/portable-atomic/compare/v0.3.10...v0.3.11
[0.3.10]: https://github.com/taiki-e/portable-atomic/compare/v0.3.9...v0.3.10
[0.3.9]: https://github.com/taiki-e/portable-atomic/compare/v0.3.8...v0.3.9
[0.3.8]: https://github.com/taiki-e/portable-atomic/compare/v0.3.7...v0.3.8
[0.3.7]: https://github.com/taiki-e/portable-atomic/compare/v0.3.6...v0.3.7
[0.3.6]: https://github.com/taiki-e/portable-atomic/compare/v0.3.5...v0.3.6
[0.3.5]: https://github.com/taiki-e/portable-atomic/compare/v0.3.4...v0.3.5
[0.3.4]: https://github.com/taiki-e/portable-atomic/compare/v0.3.3...v0.3.4
[0.3.3]: https://github.com/taiki-e/portable-atomic/compare/v0.3.2...v0.3.3
[0.3.2]: https://github.com/taiki-e/portable-atomic/compare/v0.3.1...v0.3.2
[0.3.1]: https://github.com/taiki-e/portable-atomic/compare/v0.3.0...v0.3.1
[0.3.0]: https://github.com/taiki-e/portable-atomic/compare/v0.2.1...v0.3.0
[0.2.1]: https://github.com/taiki-e/portable-atomic/compare/v0.2.0...v0.2.1
[0.2.0]: https://github.com/taiki-e/portable-atomic/compare/v0.1.4...v0.2.0
[0.1.4]: https://github.com/taiki-e/portable-atomic/compare/v0.1.3...v0.1.4
[0.1.3]: https://github.com/taiki-e/portable-atomic/compare/v0.1.2...v0.1.3
[0.1.2]: https://github.com/taiki-e/portable-atomic/compare/v0.1.1...v0.1.2
[0.1.1]: https://github.com/taiki-e/portable-atomic/compare/v0.1.0...v0.1.1
[0.1.0]: https://github.com/taiki-e/portable-atomic/releases/tag/v0.1.0
