Bump portable-atomic from 1.7.0 to 1.8.0 in /src/rust

[dependabot]

Bumps portable-atomic from 1.7.0 to 1.8.0.

Changelog

Sourced from portable-atomic's changelog.

[1.8.0] - 2024-09-20

• Improve diagnostics when method that requires CAS is unavailable. (#181)

  Before:

  error[E0599]: no method named `compare_exchange` found for struct `portable_atomic::AtomicUsize` in the current scope
    --> src/race.rs:60:24
     |
  60 |             self.inner.compare_exchange(0, value.get(), Ordering::AcqRel, Ordering::Acquire);
     |                        ^^^^^^^^^^^^^^^^ method not found in `AtomicUsize`
  

  After:

  error[E0277]: `compare_exchange` requires atomic CAS but not available on this target by default
      --> src/race.rs:60:24
       |
  60   |             self.inner.compare_exchange(0, value.get(), Ordering::AcqRel, Ordering::Acquire);
       |                        ^^^^^^^^^^^^^^^^ this associated function is not available on this target by default
       |
       = help: the trait `HasCompareExchange` is not implemented for `&portable_atomic::AtomicUsize`
       = note: consider enabling one of the `unsafe-assume-single-core` or `critical-section` Cargo features
       = note: see <https://docs.rs/portable-atomic/latest/portable_atomic/#optional-features> for more.
  

• Improve compile error messages for some other cases (19716ac, 61dcaaa)

• Various improvements to RISC-V.

  • riscv64: Support 128-bit atomics when Zacas extension enabled. (173) This is currently marked as experimental because LLVM marking the corresponding target feature as experimental.
  • riscv32: Support 64-bit atomics when Zacas extension enabled. (173) This is currently marked as experimental because LLVM marking the corresponding target feature as experimental.
  • Improvements for RISC-V without A-extension:
    • Support zaamo target feature. When building for single-core RISC-V without A-extension, this is equivalent to force-amo feature (8abba4b)
    • Support zabha target feature. (694364a)
    • Strengthen SeqCst store to improve compatibility with code that uses atomic instruction mapping that differs from LLVM and GCC. (5b10b15)

• Improve support of run-time detection and outline-atomics:

  • aarch64: Support run-time detection of FEAT_LRCPC3/FEAT_LSE128 for load/store. (#174)
  • aarch64: Support run-time detection of FEAT_LSE2 on OpenBSD. (4f8c735)
  • aarch64: Support run-time detection of FEAT_LSE/FEAT_LSE2 on illumos (currently disabled by default because illumos AArch64 port is experimental). (#175)
  • powerpc64: Support run-time detection on OpenBSD 7.6+ (currently disabled by default for compatibility with old versions). (09a967b)

• aarch64: Support FEAT_LRCPC3/FEAT_LSE128 with pre-16 LLVM. (#178)

• aarch64: Improve compile-time detection of FEAT_LSE2/FEAT_LRCPC3/FEAT_LSE128. (10d47de)

• Relax minimal version of serde (supported via optional feature) to 1.0.60.

Commits

• dd39953 Release portable-atomic 1.8.0
• a0b3e1b Update changelog
• fc902d0 Tweak docs
• dc1dc70 Invert llvm cfgs
• 3cc4c94 detect: Support run-time detection on AArch64 illumos
• 27cdc16 Add detect/README.md
• c5ded94 Update comments
• 8355f4b bench: Ignore clippy::duplicated_attributes lint
• e2718de arm_linux: Use atomic64! macro from macros.rs
• 84833aa Add imp/atomic{64,128}/mod.rs to reduce uses of #[path]
• Additional commits viewable in compare view

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