refactor backend and move power modeling to backend.

[XZman]

No description provided.

[Copilot]

Pull request overview

This PR refactors NeuSim’s power/DVFS logic by moving the heavy power modeling implementation into the backend, keeping the frontend modules as orchestration + backward-compatible facades, and introducing a dedicated power-gating config module under neusim/configs/.

Changes:

• Moved power/energy modeling functions into neusim/npusim/backend/power_model.py and relocated DVFS policy + DVFS power lookup into backend modules.
• Converted frontend DVFS modules to simple re-export facades and updated frontend power analysis to import/re-export backend functionality.
• Added neusim/configs/power_gating/PowerGatingConfig.py (+ tests) and updated docs to point to the new config location.

Reviewed changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
README.md	Updates documentation references to the new power gating config location.
neusim/npusim/frontend/power_analysis_lib.py	Becomes an orchestration facade that re-exports backend power/DVFS functions and pulls PowerGatingConfig from configs.
neusim/npusim/frontend/dvfs_power_getter.py	Now a backward-compatible re-export facade to backend DVFS power getter.
neusim/npusim/frontend/dvfs_policy_lib.py	Now a backward-compatible re-export facade to backend DVFS policy lib.
neusim/npusim/backend/power_model.py	New backend home for core energy/power modeling functions.
neusim/npusim/backend/dvfs_power_getter.py	New backend home for DVFS V/f tables and power lookup logic.
neusim/npusim/backend/dvfs_policy_lib.py	New backend home for DVFS policy selection logic.
neusim/npusim/backend/tests/test_power_model.py	Adds unit tests for backend power model primitives.
neusim/npusim/backend/tests/test_dvfs_power_getter.py	Adds unit tests for backend DVFS power lookup.
neusim/npusim/backend/tests/test_dvfs_policy_lib.py	Adds unit tests for backend DVFS policy logic.
neusim/configs/power_gating/PowerGatingConfig.py	Introduces centralized power-gating config model + presets.
neusim/configs/power_gating/tests/test_power_gating_config.py	Adds tests for power-gating presets and sensitivity parsing.
CONTRIBUTING.md	Updates repo structure docs to reflect backend/frontend responsibility split.
CLAUDE.md	Adds repository guidance (dev commands, architecture notes).

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