gungraun 0.18.0

High-precision, one-shot and consistent benchmarking framework/harness for Rust. All Valgrind tools at your fingertips.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

//! Provide the assembly optimized implementation of `valgrind_do_client_request_expr`

use core::arch::asm;

/// The optimized implementation of `valgrind_do_client_request_expr`
#[inline(always)]
#[allow(clippy::similar_names)]
pub fn valgrind_do_client_request_expr(
    default: usize,
    request: cty::c_uint,
    arg1: usize,
    arg2: usize,
    arg3: usize,
    arg4: usize,
    arg5: usize,
) -> usize {
    let args: [usize; 6] = [request as usize, arg1, arg2, arg3, arg4, arg5];
    let result;
    // SAFETY: These assembly instructions do nothing when not run under valgrind
    unsafe {
        asm! {
            "rol rdi,3",
            "rol rdi,13",
            "rol rdi,61",
            "rol rdi,51",
            "xchg rbx, rbx",
            lateout("rdx") result,
            in("rax") args.as_ptr(),
            in("rdx") default,
        };
    }
    result
}