13377xto 2023 Verified 【2024-2026】

| # | Category | Description | Detection Method | Fix | |---|----------|-------------|------------------|-----| | 1 | DFE Control‑Path | : A race condition between CFG write and DFE execution caused a one‑cycle stall that violated the no‑interleaved‑CFG property. | Formal model checking (counter‑example of 7‑cycle window). | Inserted a pipeline barrier after each CFG write. | | 2 | Core Pipeline | ROB‑Overflow : Under extreme branch‑misprediction bursts, the ROB could overflow before retire. | Coverage‑directed random simulation (2 M instruction bursts). | Increased ROB size to 224 entries and added early‑retire heuristic. | | 3 | Memory Coherence | Shared‑Dirty Violation : Simultaneous dirty state of a cache line in core and DFE caused coherence protocol dead‑lock. | Emulation (hardware‑accelerated stress test). | Added a dirty‑interlock arbitration in the L2 directory. | | 4 | Power‑Gating | Spurious Wake‑up : Power‑gated DFE domain sometimes woke up due to spurious wake‑signal toggling during low‑power entry. | Formal property “no‑wake‑up‑without‑request”. | Implemented glitch‑filtering on wake‑signal net. |

After conducting our verification process, we are pleased to confirm that: 13377xto 2023 verified

While the architectural innovations promise up to performance gains on mixed workloads, they also expand the verification state space dramatically. Traditional verification flows that rely solely on simulation are insufficient for guaranteeing correctness across the full spectrum of corner cases introduced by the DFE’s dynamic re‑configuration. | # | Category | Description | Detection