[itsbo5]

What

Identifies NID Ye20uNnlglA as abs in libc and implements it under abs_nid_postfix in Math.cpp. Removes the unknown stub from Export.cpp and adds unit tests in GuestMath.cpp.

Tested

GuestMath unit tests covering abs_nid_postfix with positive, negative, zero, and boundary integer values.

Checklist

• Based on current main; no other open PR implements the same functions
• One topic per PR; follow-ups go in a new PR
• No comments in code except technical debt
• Unimplemented paths throw (NotImplemented_nid_no_patch); silent stubs are listed in TechnicalDebt
• No notes, investigation .md files or images added to the repository (attach them to this PR)
• New third-party code is a submodule built from source
• Generic behaviour, not specific to one title
• Depends on: none
• AI-assisted: yes

[github-actions]

Other open pull requests touch the same code. Merging one will break the other, or both implement the same thing. If this one builds on them, list them in Depends on.

Pull request	Conflicting files (lines on main)	Same exports	Same new files
#2301	core/libs/prx/libc/Export.cpp L45-53

[Kikoarl]

Tested on Linux (CachyOS x86_64, Intel RPL-S iGPU / Mesa 26.3.0-devel / Vulkan 1.4.363, GCC 16.2.1) at 5ceff58e:

• Build: Built cleanly in RAM (/tmp/anyps5_build) with zero warnings/errors.
• Conventions: python3 tools/check_conventions.py --base origin/main --head HEAD -> PASS (0 errors).
• Verification: Verified GuestMath.cpp tests for abs. Cleanly exposed in libc exports following standard POSIX/C library behavior.

LGTM!

[popcoder565]

Native Windows run, since no Windows results were posted. Setup: Windows 10 (19045), MinGW-w64 GCC 15.2.0 (WinLibs r7), Release. Head 5ceff58e, merged onto main f8c2f07 in one build with 9 other PRs that had no Windows run.

• This PR's tests pass: guest_math.
• Full ctest in that build: 512 of 513. The one failure is agc_driver_depth_fast_clear_submit from fix(agc): storage access to a depth surface's stencil plane through its stencil aspect #2325, which fails intermittently on its own too. The test comes from feat(agc): depth planes sampled as 2D arrays, cubes and integer views #425, where I reported it.

No title was run.

🤖 Addressed by Claude Code

[oneandonlydean]

Closing: no title is shown to stop at abs (Ye20uNnlglA) on main, the same reason #1952 and #1981 were closed. Reopen with the not implemented line from main when a title reaches it.