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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>
148 lines
7.6 KiB
Plaintext
148 lines
7.6 KiB
Plaintext
Iterations: 100
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Instructions: 5400
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Total Cycles: 6595
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Total uOps: 6800
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Dispatch Width: 4
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uOps Per Cycle: 1.03
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IPC: 0.82
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Block RThroughput: 17.0
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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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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 r13
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2 5 1.00 * push r12
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2 5 1.00 * push rbx
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1 1 0.33 sub rsp, 32
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1 1 0.33 mov rbx, rdi
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1 5 0.50 * mov rax, qword ptr [rdi]
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1 5 0.50 * mov r12, qword ptr [rdi + 16]
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1 1 0.33 mov rcx, rax
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1 1 0.33 sub rcx, r12
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1 1 0.33 cmp rsi, rcx
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1 1 1.00 jbe .LBB6_3
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1 1 0.33 mov r15, r12
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1 1 0.33 add r15, rsi
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1 1 1.00 jae .LBB6_6
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1 0 0.25 xor eax, eax
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1 1 1.00 jmp .LBB6_5
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1 5 0.50 * mov rax, qword ptr [rbx + 8]
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1 1 0.50 lea r15, [r12 + rsi]
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1 1 0.50 lea rcx, [r12 + 2*r12]
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1 1 0.50 lea rdi, [rax + 2*rcx]
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1 1 0.33 add rsi, rsi
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1 1 0.50 lea rdx, [rsi + 2*rsi]
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1 0 0.25 xor esi, esi
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4 7 1.00 * call qword ptr [rip + memset@GOTPCREL]
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1 1 1.00 * mov qword ptr [rbx + 16], r15
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1 1 0.33 mov al, 1
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1 1 0.33 add rsp, 32
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1 6 0.50 * pop rbx
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1 6 0.50 * pop r12
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1 6 0.50 * pop r13
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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 U ret
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1 1 0.33 mov r13, rsi
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1 1 0.50 lea rcx, [rax + rax]
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1 1 0.33 cmp r15, rcx
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3 3 1.00 cmova rcx, r15
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1 1 0.33 cmp rcx, 5
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1 1 0.33 mov r14d, 4
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2 2 0.67 cmovae r14, rcx
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1 5 0.50 * mov rdx, qword ptr [rbx + 8]
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1 1 0.50 lea rdi, [rsp + 8]
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1 1 0.33 mov rsi, rax
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1 1 0.33 mov rcx, r14
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3 5 1.00 call <alloc::raw_vec::RawVecInner>::finish_grow
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2 6 0.50 * cmp dword ptr [rsp + 8], 1
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1 1 1.00 je .LBB6_2
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1 5 0.50 * mov rax, qword ptr [rsp + 16]
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1 1 1.00 * mov qword ptr [rbx + 8], rax
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1 1 1.00 * mov qword ptr [rbx], r14
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1 1 0.33 mov rsi, r13
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1 1 1.00 jmp .LBB6_4
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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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- - 12.00 12.00 10.00 13.00 11.00 11.00
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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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- - - - 1.00 - 0.49 0.51 push r15
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- - - - 1.00 - 0.51 0.49 push r14
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- - - - 1.00 - 0.50 0.50 push r13
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- - - - 1.00 - 0.50 0.50 push r12
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- - - - 1.00 - 0.50 0.50 push rbx
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- - 0.01 0.99 - - - - sub rsp, 32
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- - - - - 1.00 - - mov rbx, rdi
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- - - - - - 0.50 0.50 mov rax, qword ptr [rdi]
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- - - - - - 0.50 0.50 mov r12, qword ptr [rdi + 16]
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- - - 1.00 - - - - mov rcx, rax
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- - - 0.99 - 0.01 - - sub rcx, r12
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- - - - - 1.00 - - cmp rsi, rcx
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- - - - - 1.00 - - jbe .LBB6_3
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- - 0.01 0.98 - 0.01 - - mov r15, r12
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- - 0.99 0.01 - - - - add r15, rsi
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- - - - - 1.00 - - jae .LBB6_6
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- - - - - - - - xor eax, eax
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- - - - - 1.00 - - jmp .LBB6_5
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- - - - - - 0.50 0.50 mov rax, qword ptr [rbx + 8]
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- - 1.00 - - - - - lea r15, [r12 + rsi]
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- - 0.98 0.02 - - - - lea rcx, [r12 + 2*r12]
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- - 0.99 0.01 - - - - lea rdi, [rax + 2*rcx]
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- - - 1.00 - - - - add rsi, rsi
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- - 0.99 0.01 - - - - lea rdx, [rsi + 2*rsi]
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- - - - - - - - xor esi, esi
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- - - - 1.00 1.00 1.00 1.00 call qword ptr [rip + memset@GOTPCREL]
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- - - - 1.00 - 0.50 0.50 mov qword ptr [rbx + 16], r15
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- - 0.01 0.99 - - - - mov al, 1
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- - 1.00 - - - - - add rsp, 32
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- - - - - - 0.50 0.50 pop rbx
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- - - - - - 0.50 0.50 pop r12
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- - - - - - 0.50 0.50 pop r13
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- - - - - - 0.50 0.50 pop r14
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- - - - - - 0.50 0.50 pop r15
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- - - - - 1.00 - - ret
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- - 1.00 - - - - - mov r13, rsi
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- - 0.01 0.99 - - - - lea rcx, [rax + rax]
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- - 0.99 0.01 - - - - cmp r15, rcx
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- - 2.00 0.01 - 0.99 - - cmova rcx, r15
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- - 0.01 0.99 - - - - cmp rcx, 5
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- - 0.01 0.99 - - - - mov r14d, 4
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- - 1.00 0.01 - 0.99 - - cmovae r14, rcx
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- - - - - - 0.50 0.50 mov rdx, qword ptr [rbx + 8]
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- - 0.01 0.99 - - - - lea rdi, [rsp + 8]
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- - - 1.00 - - - - mov rsi, rax
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- - - 0.01 - 0.99 - - mov rcx, r14
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- - - - 1.00 1.00 0.50 0.50 call <alloc::raw_vec::RawVecInner>::finish_grow
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- - - 0.99 - 0.01 0.50 0.50 cmp dword ptr [rsp + 8], 1
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- - - - - 1.00 - - je .LBB6_2
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- - - - - - 0.50 0.50 mov rax, qword ptr [rsp + 16]
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- - - - 1.00 - 0.49 0.51 mov qword ptr [rbx + 8], rax
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- - - - 1.00 - 0.51 0.49 mov qword ptr [rbx], r14
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- - 0.99 0.01 - - - - mov rsi, r13
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- - - - - 1.00 - - jmp .LBB6_4
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