Thanks for using Compiler Explorer
Sponsors
Jakt
C++
Ada
Analysis
Android Java
Android Kotlin
Assembly
C
C3
Carbon
C++ (Circle)
CIRCT
Clean
CMake
CMakeScript
COBOL
C++ for OpenCL
MLIR
Cppx
Cppx-Blue
Cppx-Gold
Cpp2-cppfront
Crystal
C#
CUDA C++
D
Dart
Elixir
Erlang
Fortran
F#
Go
Haskell
HLSL
Hook
Hylo
ispc
Java
Julia
Kotlin
LLVM IR
LLVM MIR
Modula-2
Nim
Objective-C
Objective-C++
OCaml
OpenCL C
Pascal
Pony
Python
Racket
Ruby
Rust
Snowball
Scala
Solidity
Spice
Swift
LLVM TableGen
Toit
TypeScript Native
V
Vala
Visual Basic
Zig
Javascript
GIMPLE
rust source #1
Output
Compile to binary object
Link to binary
Execute the code
Intel asm syntax
Demangle identifiers
Verbose demangling
Filters
Unused labels
Library functions
Directives
Comments
Horizontal whitespace
Debug intrinsics
Compiler
BPF gcc (trunk)
mrustc (master)
rustc 1.0.0
rustc 1.1.0
rustc 1.10.0
rustc 1.11.0
rustc 1.12.0
rustc 1.13.0
rustc 1.14.0
rustc 1.15.1
rustc 1.16.0
rustc 1.17.0
rustc 1.18.0
rustc 1.19.0
rustc 1.2.0
rustc 1.20.0
rustc 1.21.0
rustc 1.22.0
rustc 1.23.0
rustc 1.24.0
rustc 1.25.0
rustc 1.26.0
rustc 1.27.0
rustc 1.27.1
rustc 1.28.0
rustc 1.29.0
rustc 1.3.0
rustc 1.30.0
rustc 1.31.0
rustc 1.32.0
rustc 1.33.0
rustc 1.34.0
rustc 1.35.0
rustc 1.36.0
rustc 1.37.0
rustc 1.38.0
rustc 1.39.0
rustc 1.4.0
rustc 1.40.0
rustc 1.41.0
rustc 1.42.0
rustc 1.43.0
rustc 1.44.0
rustc 1.45.0
rustc 1.45.2
rustc 1.46.0
rustc 1.47.0
rustc 1.48.0
rustc 1.49.0
rustc 1.5.0
rustc 1.50.0
rustc 1.51.0
rustc 1.52.0
rustc 1.53.0
rustc 1.54.0
rustc 1.55.0
rustc 1.56.0
rustc 1.57.0
rustc 1.58.0
rustc 1.59.0
rustc 1.6.0
rustc 1.60.0
rustc 1.61.0
rustc 1.62.0
rustc 1.63.0
rustc 1.64.0
rustc 1.65.0
rustc 1.66.0
rustc 1.67.0
rustc 1.68.0
rustc 1.69.0
rustc 1.7.0
rustc 1.70.0
rustc 1.71.0
rustc 1.72.0
rustc 1.73.0
rustc 1.74.0
rustc 1.75.0
rustc 1.76.0
rustc 1.77.0
rustc 1.8.0
rustc 1.9.0
rustc beta
rustc nightly
rustc-cg-gcc (master)
x86-64 GCCRS (GCC master)
x86-64 GCCRS (GCCRS master)
Options
Source code
/* pub fn all_nonzero(v: &[u8]) -> bool { if v.len() > 32 { #[cfg(target_feature = "avx2")] return all_nonzero_long_avx2(v); } v.iter().copied().min() != Some(0) } */ // SAFETY: must have v.len() > 32 #[target_feature(enable = "avx2")] pub unsafe fn all_nonzero_long_avx2(v: &[u8]) -> bool { use std::arch::x86_64::{ _mm256_min_epu8, _mm256_loadu_si256, _mm256_cmpeq_epi8, _mm256_movemask_epi8, _mm256_setzero_si256 }; // Move slice start to the next 32-byte boundary even if it was already // aligned, and move end 32 bytes down. v.len() > 32 so there is at // least one 32-byte boundary strictly inside the slice, and the // unaligned loads are valid. let range = v.as_ptr_range(); let mut ptr = ((range.start as usize & !31) + 32) as *const _; let end = (range.end as usize - 32) as *const _; let mut min0 = _mm256_loadu_si256(range.start as *const _); let mut min1 = _mm256_loadu_si256(end); if (ptr as usize ^ end as usize) & 32 == 0 { min0 = _mm256_min_epu8(*ptr, min0); ptr = ptr.add(1); } while ptr < end { min1 = _mm256_min_epu8(*ptr, min1); ptr = ptr.add(1); min0 = _mm256_min_epu8(*ptr, min0); ptr = ptr.add(1); } let min = _mm256_min_epu8(min0, min1); // All values are nonzero if all their minimums are. let cmp = _mm256_cmpeq_epi8(min, _mm256_setzero_si256()); let any = _mm256_movemask_epi8(cmp); any == 0 }
Become a Patron
Sponsor on GitHub
Donate via PayPal
Source on GitHub
Mailing list
Installed libraries
Wiki
Report an issue
How it works
Contact the author
CE on Mastodon
About the author
Statistics
Changelog
Version tree