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Add a symbolic link to the top-level license file; this is dereferenced
by cargo publish, and the LICENSE appears as a regular file in the
published crate.
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Changes since 1.5.0:
- The Rust crate is now compatible with Miri.
- ~1% performance improvement on Arm NEON contributed by @divinity76 (#384).
- Various fixes and improvements in the CMake build.
- The MSRV of b3sum is now 1.74.1. (The MSRV of the library crate is
unchanged, 1.66.1.)
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vld1q_u8 and vst1q_u8 has no alignment requirements.
This improves performance on Oracle Cloud's VM.Standard.A1.Flex by 1.15% on a 16*1024 input, from 13920 nanoseconds down to 13800 nanoseconds (approx)
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```
/home/travis/build/php/php-src/ext/hash/blake3/upstream_blake3/c/blake3.c: In function ‘compress_subtree_to_parent_node’:
/home/travis/build/php/php-src/ext/hash/blake3/upstream_blake3/c/blake3.c:354:22: error: logical ‘and’ of mutually exclusive tests is always false [-Werror=logical-op]
354 | while (num_cvs > 2 && num_cvs <= MAX_SIMD_DEGREE_OR_2) {
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cc1: all warnings being treated as errors
make: *** [Makefile:1910: ext/hash/blake3/upstream_blake3/c/blake3.lo] Error 1
```
Fixes https://github.com/BLAKE3-team/BLAKE3/issues/379.
Closes https://github.com/BLAKE3-team/BLAKE3/pull/380.
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Basically all of the `actions-rs/*` actions are unmaintained. See
<https://github.com/actions-rs/toolchain/issues/216> for more
information. Due to their age they generate several warnings in
CI runs.
To get rid of those warnings the occurrences of
`actions-rs/toolchain` are replaced by `dtolnay/rust-toolchain`.
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Specify language requirement as a [compile-feature] and force compiler
extensions off ensuring portability problems are detected early on.
Note that we do not use the `C_STANDARD` property, because it doesn't
propagate to dependent targets and would prohibit users from compiling
their code base with consistent flags / language configuations if they
were to target a newer C standard. Similarly we do not configure
`C_STANDARD_REQUIRED` as [compile-features] do not interact with
it--they are enforced regardless.
[compile-feature]: https://cmake.org/cmake/help/latest/manual/cmake-compile-features.7.html#compile-feature-requirements
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add_subdirectory or FetchContent
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clang-cl is LLVM's MSVC-compatible compiler frontend for Windows ABI.
If clang-cl is in use, `CMAKE_C_COMPILER_ID` is `Clang` even though
it doesn't take Unix-like command line options but MSVC-like options.
`if(MSVC)` is the correct predicate to check if we should pass MSVC-ish
command line options.
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ARMv8 CPUs are guaranteed to support NEON instructions. However, for
32bit ARMv8 triplets GCC needs to explicitly be configured to enable
NEON intrinsics.
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Previously we only disabled these warnings for SSE2, which is assumed
enabled on x86-64, but it looks like new nightly compilers are also
assuming SSE4.1 on macOS. Disabling these warnings across all the
detection functions accounts for that, and it also gets rid of some
warnings that you'd see if you used RUSTFLAGS='-C target-cpu=native'.
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Changes since 1.4.1:
- The Rust crate's Hasher type has gained new helper methods for common
forms of IO: update_reader, update_mmap, and update_mmap_rayon. The
latter matches the default behavior of b3sum. The mmap methods are
gated by the new "mmap" Cargo feature.
- Most of the Rust crate's public types now implement the Zeroize trait.
This is gated by the new "zeroize" Cargo feature.
- The Rust crate's Hash types now implements the serde Serialize and
Deserialize traits. This is gated by the new "serde" Cargo feature.
- The C library now uses atomics to cache detected CPU features under
most compilers other than MSVC. Previously this was a non-atomic
write, which was probably "benign" but made TSan unhappy.
- NEON support is now disabled by default on big-endian AArch64.
Previously this was a build error if the caller didn't explicitly
disable it.
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Added a new cargo feature `serde` that when enabled will derive
`serde::Serialize` and `serde::Deserialize` for the `blake3::Hash`
struct.
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...because this would otherwise hit
#error "This implementation only supports little-endian ARM."
in c/blake3_neon.c.
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This makes them consistent with how the existing update() and
update_rayon() methods work, with the difference being that it's it's
io::Result<&mut Self> instead of just &mut Self.
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New methods:
- update_reader
- update_mmap
- update_mmap_rayon
These are more discoverable, more convenient, and safer.
There are two problems I want to avoid by taking a `Path` instead of a
`File`. First, exposing `Mmap` objects to the caller is fundamentally
unsafe, and making `maybe_mmap_file` private avoids that issue. Second,
taking a `File` raises questions about whether memory mapped reads
should behave like regular file reads. (Should they respect the current
seek position? Should they update the seek position?) Taking a `Path`
from the caller and opening the `File` internally avoids these
questions.
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As part of this change, I don't think we need the `zeroize_crate`
workaround anymore if we use the relateively new `dep:` syntax in
Cargo.toml.
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https://twitter.com/burntsushi5/status/1695483429997945092
https://github.com/rust-lang/compiler-team/issues/648
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As usual, the driver here is the MSRV of clap. I should've checked this
when I updated the Cargo.lock file.
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If multiple threads try to compute a hash simultaneously before the library has been used for the first time,
the logic in get_cpu_features that detects CPU features will write to g_cpu_features without synchronization,
which is a race condition and flagged by ThreadSanitizer.
This change marks g_cpu_features as an atomic variable to address the race condition.
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