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c37398010a
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>
80 lines
3.2 KiB
Plaintext
80 lines
3.2 KiB
Plaintext
Iterations: 100
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Instructions: 2000
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Total Cycles: 682
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Total uOps: 2100
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Dispatch Width: 4
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uOps Per Cycle: 3.08
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IPC: 2.93
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Block RThroughput: 5.3
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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 0.50 lea eax, [rsi + rdi]
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1 1 0.33 test al, 3
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1 1 1.00 jne .LBB5_1
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1 1 0.33 movabs rax, 9223372036854775804
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1 1 0.33 and rax, rsi
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1 1 0.33 cmp rax, 9
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1 1 1.00 jae .LBB5_3
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1 0 0.25 xor eax, eax
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1 1 1.00 U ret
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1 1 0.33 add rax, -9
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1 1 0.33 movabs rcx, -6148914691236517205
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2 4 1.00 mul rcx
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1 1 0.50 shr rdx
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1 1 0.50 lea rax, [rdx + 2*rdx]
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1 1 0.33 sub rsi, rax
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1 1 0.33 or rax, -4
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1 1 0.33 add rsi, rdi
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1 1 0.33 add rax, rsi
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1 1 0.33 add rax, -8
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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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- - 6.65 6.67 - 6.68 - -
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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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- - 0.90 0.10 - - - - lea eax, [rsi + rdi]
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- - 0.93 - - 0.07 - - test al, 3
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- - - - - 1.00 - - jne .LBB5_1
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- - 0.51 0.47 - 0.02 - - movabs rax, 9223372036854775804
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- - - - - 1.00 - - and rax, rsi
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- - - 0.09 - 0.91 - - cmp rax, 9
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- - - - - 1.00 - - jae .LBB5_3
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- - - - - - - - xor eax, eax
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- - - - - 1.00 - - ret
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- - 0.43 0.47 - 0.10 - - add rax, -9
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- - 0.42 0.39 - 0.19 - - movabs rcx, -6148914691236517205
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- - 1.00 1.00 - - - - mul rcx
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- - 0.69 - - 0.31 - - shr rdx
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- - 0.54 0.46 - - - - lea rax, [rdx + 2*rdx]
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- - 0.07 0.91 - 0.02 - - sub rsi, rax
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- - 0.91 0.05 - 0.04 - - or rax, -4
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- - 0.08 0.90 - 0.02 - - add rsi, rdi
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- - 0.09 0.91 - - - - add rax, rsi
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- - 0.08 0.92 - - - - add rax, -8
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- - - - - 1.00 - - ret
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