[Support] Investigate making KnownBits saturated add/sub implementations optimal

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Description

Contributor guide

Research direction

Examine the test code in KnownBitsTest.cpp to understand the current implementation's optimality checks. Then, review the KnownBits saturated add/sub implementations in KnownBits.h or related files to identify potential inefficiencies. Compare with known optimal algorithms for saturated arithmetic (e.g., using carry bits or min/max).

Tech stack

cpp

Domain

compilers

Issue type

Research

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

2

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-3 hours

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++Git

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

70