c7a63bc2c8
Fixes found by reading all 17 muh files + 6 CCCL counterpart policy_selectors as full source code input: 1. topk: BLOCK_LOAD_DIRECT → BLOCK_LOAD_VECTORIZE (CCCL SM90+ uses VECTORIZE). bits_per_pass was wrong (muh: ks<=4→9, CCCL: ks>=2→11). items now computed dynamically (4*4/key_size) not hardcoded. 2. reduce: added determinism dispatch — three modes matching CCCL: gpu_to_gpu (BLOCK_REDUCE_RAKING, vec_size=1, LOAD_DEFAULT), run_to_run (WARP_REDUCTIONS, LOAD_LDG, default), not_guaranteed (WARP_REDUCTIONS_NONDETERMINISTIC). Added bi100_det_float32 and bi100_det_float64 tuning structs with SM90 benchmark reference values. 3. batch_memcpy: flat single-tier → SmallBuffer+LargeBuffer two-tier matching CCCL structure (128 threads small, 256 threads large, warp_threshold=128, block_threshold=8192). 4. transform: single BulkPolicy → three-policy structure (VectorizedPolicy + AsyncCopyPolicy + PrefetchPolicy) matching CCCL. items_per_thread computed from bytes_in_flight / (threads * elem_size). 5. compile_test: 17 checks → 33 checks. Now verifies exact values: reduce determinism modes, topk VECTORIZE + bits=11, batch_memcpy two-tier thresholds, transform three-policy structure. 6. gen_patch: added fallback extraction for inline policy_selector values (topk now generates SAMPLING_BLOCK_SIZE patch). 7. MUH_PROJECT_CHECKPOINT.md: 'PRD设计阶段还没有代码' → actual status. 7 files changed, 413 insertions, 265 deletions.