dotnet/runtime

Have more C++ intrinsics usage in runtime and JIT

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#69,401 opened on May 16, 2022

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area-CodeGen-coreclrhelp wanted

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Description

We should start adding more C++ intrinsics helper methods and start consuming them in runtime and JIT codebase for throughput increase. E.g. https://github.com/dotnet/runtime/pull/69333 changes the genLog2() implementation of Arm64 to use BitScanForward.

category:implementation theme:throughput skill-level:intermediate cost:medium impact:small

Contributor guide

Research direction
Study existing C++ intrinsic usages in the runtime and JIT codebase. Identify methods that can benefit from intrinsics, like bit manipulation or vector operations. Review PR #69333 for reference. Then implement similar improvements.
Tech stack
cpp
Domain
backend
Issue type
Performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++Gitcompiler fundamentals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35