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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>
114 lines
5.6 KiB
Plaintext
114 lines
5.6 KiB
Plaintext
Iterations: 100
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Instructions: 3700
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Total Cycles: 3486
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Total uOps: 4600
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Dispatch Width: 4
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uOps Per Cycle: 1.32
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IPC: 1.06
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Block RThroughput: 12.0
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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 rax, rdi
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1 1 0.33 movabs rcx, 1537228672809129301
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1 1 0.33 cmp rsi, rcx
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1 1 1.00 ja .LBB5_5
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1 1 0.33 test rsi, rsi
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1 1 1.00 je .LBB5_2
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2 5 1.00 * push r15
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2 5 1.00 * push r14
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2 5 1.00 * push rbx
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1 1 0.50 lea rcx, [rsi + rsi]
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1 1 0.50 lea rbx, [rcx + 2*rcx]
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1 1 0.33 mov r14, rax
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1 1 0.33 mov r15, rsi
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4 7 1.00 * call qword ptr [rip + __rustc::__rust_no_alloc_shim_is_unstable_v2@GOTPCREL]
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1 1 0.33 mov esi, 2
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1 1 0.33 mov rdi, rbx
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4 7 1.00 * call qword ptr [rip + __rustc::__rust_alloc_zeroed@GOTPCREL]
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1 1 0.33 mov rsi, r15
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1 1 0.33 mov rcx, rax
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1 1 0.33 mov rax, r14
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1 1 0.33 test rcx, rcx
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1 6 0.50 * pop rbx
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1 6 0.50 * pop r14
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1 6 0.50 * pop r15
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1 1 1.00 je .LBB5_5
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1 1 1.00 * mov qword ptr [rax], rsi
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1 1 1.00 * mov qword ptr [rax + 8], rcx
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1 1 1.00 * mov qword ptr [rax + 16], rsi
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1 1 1.00 U ret
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1 1 0.33 movabs rcx, -9223372036854775808
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1 1 1.00 * mov qword ptr [rax], rcx
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1 1 1.00 U ret
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1 1 0.33 mov ecx, 2
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1 1 1.00 * mov qword ptr [rax], rsi
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1 1 1.00 * mov qword ptr [rax + 8], rcx
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1 1 1.00 * mov qword ptr [rax + 16], rsi
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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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- - 6.99 6.99 12.00 10.02 8.00 9.00
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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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- - 0.01 0.98 - 0.01 - - mov rax, rdi
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- - 0.98 0.02 - - - - movabs rcx, 1537228672809129301
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- - 0.02 0.98 - - - - cmp rsi, rcx
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- - - - - 1.00 - - ja .LBB5_5
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- - 0.98 - - 0.02 - - test rsi, rsi
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- - - - - 1.00 - - je .LBB5_2
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- - - - 1.00 - - 1.00 push r15
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- - - - 1.00 - 1.00 - push r14
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- - - - 1.00 - - 1.00 push rbx
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- - - 1.00 - - - - lea rcx, [rsi + rsi]
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- - - 1.00 - - - - lea rbx, [rcx + 2*rcx]
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- - 1.00 - - - - - mov r14, rax
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- - 1.00 - - - - - mov r15, rsi
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- - - - 1.00 1.00 2.00 - call qword ptr [rip + __rustc::__rust_no_alloc_shim_is_unstable_v2@GOTPCREL]
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- - - 0.01 - 0.99 - - mov esi, 2
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- - 0.01 0.99 - - - - mov rdi, rbx
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- - - - 1.00 1.00 - 2.00 call qword ptr [rip + __rustc::__rust_alloc_zeroed@GOTPCREL]
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- - 0.01 - - 0.99 - - mov rsi, r15
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- - 0.99 0.01 - - - - mov rcx, rax
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- - - 0.99 - 0.01 - - mov rax, r14
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- - 0.99 0.01 - - - - test rcx, rcx
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- - - - - - - 1.00 pop rbx
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- - - - - - 1.00 - pop r14
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- - - - - - - 1.00 pop r15
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- - - - - 1.00 - - je .LBB5_5
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- - - - 1.00 - 1.00 - mov qword ptr [rax], rsi
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- - - - 1.00 - - 1.00 mov qword ptr [rax + 8], rcx
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- - - - 1.00 - 1.00 - mov qword ptr [rax + 16], rsi
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- - - - - 1.00 - - ret
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- - 0.01 0.99 - - - - movabs rcx, -9223372036854775808
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- - - - 1.00 - - 1.00 mov qword ptr [rax], rcx
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- - - - - 1.00 - - ret
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- - 0.99 0.01 - - - - mov ecx, 2
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- - - - 1.00 - 1.00 - mov qword ptr [rax], rsi
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- - - - 1.00 - - 1.00 mov qword ptr [rax + 8], rcx
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- - - - 1.00 - 1.00 - mov qword ptr [rax + 16], rsi
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- - - - - 1.00 - - ret
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