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This is a subset of the Rust `zerocopy` crate, version v0.8.50 (released
2026-05-31), licensed under "BSD-2-Clause OR Apache-2.0 OR MIT", from:
https://github.com/google/zerocopy/tree/v0.8.50
The files are copied as-is, with no modifications whatsoever (not even
adding the SPDX identifiers).
The `benches` folder is added (i.e. not just `src` like in other cases)
since the files there are included in the rendered documentation,
as well as the `rustdoc` CSS style file that is needed to make those
visually more understandable.
For copyright details, please see:
https://github.com/google/zerocopy/blob/v0.8.50/README.md?plain=1
https://github.com/google/zerocopy/blob/v0.8.50/LICENSE-BSD
https://github.com/google/zerocopy/blob/v0.8.50/LICENSE-APACHE
https://github.com/google/zerocopy/blob/v0.8.50/LICENSE-MIT
The next two patches modify these files as needed for use within the
kernel. This patch split allows reviewers to double-check the import
and to clearly see the differences introduced.
The following script may be used to verify the contents:
for path in $(cd rust/zerocopy/ && find . -type f); do
curl --silent --show-error --location \
https://github.com/google/zerocopy/raw/v0.8.50/$path \
| diff --unified rust/zerocopy/$path - && echo $path: OK
done
Cc: Joshua Liebow-Feeser <joshlf@google.com>
Cc: Jack Wrenn <jswrenn@google.com>
Link: https://patch.msgid.link/20260608141439.182634-9-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
66 lines
2.3 KiB
Plaintext
66 lines
2.3 KiB
Plaintext
Iterations: 100
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Instructions: 1300
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Total Cycles: 377
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Total uOps: 1400
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Dispatch Width: 4
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uOps Per Cycle: 3.71
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IPC: 3.45
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Block RThroughput: 3.5
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Instruction Info:
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[1]: #uOps
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[2]: Latency
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[3]: RThroughput
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[4]: MayLoad
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[5]: MayStore
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[6]: HasSideEffects (U)
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[1] [2] [3] [4] [5] [6] Instructions:
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1 1 0.33 mov rcx, rsi
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1 1 0.33 cmp rsi, 6
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1 1 1.00 jne .LBB5_2
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1 5 0.50 * mov eax, dword ptr [rdi]
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1 5 0.50 * movzx ecx, word ptr [rdi + 4]
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1 1 0.50 shl rcx, 32
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1 1 0.33 or rcx, rax
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1 1 0.50 shl rcx, 16
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1 1 0.33 inc rcx
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1 0 0.25 xor eax, eax
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1 1 0.33 cmp rsi, 6
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2 2 0.67 cmove rax, rcx
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1 1 1.00 U ret
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Resources:
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[0] - SBDivider
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[1] - SBFPDivider
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[2] - SBPort0
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[3] - SBPort1
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[4] - SBPort4
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[5] - SBPort5
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[6.0] - SBPort23
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[6.1] - SBPort23
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Resource pressure per iteration:
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[0] [1] [2] [3] [4] [5] [6.0] [6.1]
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- - 3.66 3.67 - 3.67 1.00 1.00
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Resource pressure by instruction:
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[0] [1] [2] [3] [4] [5] [6.0] [6.1] Instructions:
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- - 0.63 0.36 - 0.01 - - mov rcx, rsi
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- - 0.05 0.05 - 0.90 - - cmp rsi, 6
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- - - - - 1.00 - - jne .LBB5_2
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- - - - - - - 1.00 mov eax, dword ptr [rdi]
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- - - - - - 1.00 - movzx ecx, word ptr [rdi + 4]
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- - 0.97 - - 0.03 - - shl rcx, 32
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- - 0.02 0.35 - 0.63 - - or rcx, rax
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- - 0.98 - - 0.02 - - shl rcx, 16
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- - - 0.98 - 0.02 - - inc rcx
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- - - - - - - - xor eax, eax
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- - 0.03 0.93 - 0.04 - - cmp rsi, 6
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- - 0.98 1.00 - 0.02 - - cmove rax, rcx
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- - - - - 1.00 - - ret
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